Driver end circuit and driver

文档序号：347409 发布日期：2021-12-03 浏览：9次中文

阅读说明：本技术 驱动器端电路及驱动器 (Driver end circuit and driver ) 是由李暾雨林荣镇严丞辉于 2021-09-10 设计创作，主要内容包括：本申请提供一种驱动器端电路及驱动器。驱动器端电路包括：多个输入端口、多个输出端口、多个驱动器端单元以及至少一个路径切换单元；每个驱动器端单元包括第一结构和第二结构,所述第一结构包括所述驱动器端单元的构成要素中的至少一个,所述第二结构包括驱动器端单元中除第一结构以外的构成要素；所述路径切换单元连接在所述第一结构之前,用于在不同时刻下改变内部导通路径,以使每个输入端口在预定周期内,完成通过不同驱动器端单元的第一结构以及该输入端口对应的驱动器端单元的第二结构,连接至该输入端口对应的输出端口。本申请的方案,能够平均化各输出端口的偏差,从而改善驱动器端的输出特性。(The application provides a driver side circuit and a driver. The driver-side circuit includes: a plurality of input ports, a plurality of output ports, a plurality of driver side units, and at least one path switching unit; each driver-side unit includes a first structure including at least one of constituent elements of the driver-side unit and a second structure including constituent elements of the driver-side unit other than the first structure; the path switching unit is connected in front of the first structure and used for changing an internal conduction path at different times so that each input port is connected to the output port corresponding to the input port through the first structures of different driver end units and the second structure of the driver end unit corresponding to the input port in a preset period. The scheme of the application can average the deviation of each output port, thereby improving the output characteristic of the driver end.)

1. A driver side circuit, comprising: a plurality of input ports, a plurality of output ports, a plurality of driver side units, and at least one path switching unit;

each driver-side unit includes a first structure including at least one of constituent elements of the driver-side unit and a second structure including constituent elements of the driver-side unit other than the first structure;

at least one path switching unit is connected in front of the first structure and used for changing the internal conduction path at different times, so that each input port is connected to the output port corresponding to the input port through the first structures of different driver end units and the second structure of the driver end unit corresponding to the input port in a preset period.

2. The circuit of claim 1, wherein the first structure comprises a resistor and the second structure comprises an amplifier and a transistor element;

each input port is connected to the input end of the second structure of the corresponding driver end unit, and the first output end of the second structure of the driver end unit is connected with the output port corresponding to the input port;

a second output end of a second structure in the plurality of driver end units is correspondingly connected with a plurality of input ends of the path switching unit; a plurality of output ends of the path switching unit are correspondingly connected with one ends of resistors in the driver end units, and the other ends of the resistors are grounded;

the path switching unit is used for changing an internal conduction path at different times so that each input port is connected to the output port corresponding to the input port through the second structure of the driver end unit corresponding to the input port and the first structure of the different driver end units in a preset period.

3. The circuit of claim 2,

a first input terminal of the amplifier in each driver side unit, as an input terminal of the second configuration of the driver side unit, is connected to the corresponding input port; a second input end of the amplifier is connected with a second end of the transistor element in the driver end unit; the output end of the amplifier is connected with the control end of the transistor element in the driver end unit;

a first terminal of the transistor element in each driver terminal unit, as a first output terminal of the second structure in the driver terminal unit, is connected to a corresponding output port; the second end of the transistor element is used as the second output end of the second structure in the driver end unit and is correspondingly connected with the input end of the path switching unit.

4. The circuit of claim 1, wherein the first structure comprises an amplifier and a resistor; the second structure comprises a transistor element; the path switching unit comprises a first path switching unit and a second path switching unit;

the input ports are correspondingly connected with the input ends of the first path switching unit, and the output ends of the first path switching unit are correspondingly connected with the input end of a first structure in the driver end units;

the output end of a first structure in the plurality of driver end units is correspondingly connected with the input ends of the second path switching unit, and the output ends of the second path switching unit are correspondingly connected with the input end of a second structure in the plurality of driver end units; the output end of the second structure in the plurality of driver end units is correspondingly connected with the plurality of output ports;

the first path switching unit and the second path switching unit are used for changing the internal conduction path at different times, so that each input port is connected to the output port corresponding to the input port through the first structures of different driver end units and the second structure of the driver end unit corresponding to the input port in a preset period.

5. The circuit of claim 4,

a first input terminal of the amplifier in each driver terminal unit, which is used as an input terminal of the first structure in the driver terminal unit, is correspondingly connected to the plurality of output terminals of the first path switching unit; a second input terminal of the amplifier and an output terminal of the amplifier, as a set of output terminals of the first structure, are correspondingly connected to a set of input terminals of the second path switching unit;

one end of the resistor in each driver end unit is connected with the second input end of the amplifier in the driver end unit, and the other end of the resistor is grounded;

the control end and the second end of the transistor element in each driver end unit are used as a group of ports of a second structure in the driver end unit and are correspondingly connected to a group of output ends of the second path switching unit; the first terminal of the transistor element, which is the output terminal of the second structure in the driver terminal unit, is connected to the corresponding output port.

6. The circuit of claim 1, wherein the first structure comprises amplifier, resistor and transistor elements, and the second structure is empty; the path switching unit comprises a first path switching unit and a second path switching unit;

the output end of a first structure in the plurality of driver end units is correspondingly connected with the plurality of input ends of the second path switching unit, and the plurality of output ends of the second path switching unit are correspondingly connected with the plurality of output ports;

the first path switching unit and the second path switching unit are used for changing the internal conduction path at different times, so that each input port is connected to the corresponding output port of the input port through the first structures of different driver end units in a preset period.

7. The circuit of claim 6,

a first input terminal of the amplifier in each driver terminal unit, which is used as an input terminal of the first structure in the driver terminal unit, is correspondingly connected to the plurality of output terminals of the first path switching unit; a second input terminal of the amplifier is connected to a second terminal of the transistor element and one terminal of the resistor in the driver terminal unit; the output end of the amplifier is connected with the control end of the transistor element;

the other end of the resistor in each driver end unit is grounded; the first end of the transistor element in each driver end unit is used as the output end of the first structure in the driver end unit and correspondingly connected to the input end of the second path switching unit.

8. The circuit of claim 1, wherein the path switching unit is configured to change the internal conduction path at different times to complete multiple cycles within a predetermined period; each cycle comprises that each input port is connected to the output port corresponding to the input port through the first structure of different driver end units and the second structure of the driver end unit corresponding to the input port.

9. The circuit of claim 1, wherein the predetermined period comprises a duration of an interval between the driver-side circuit receiving two adjacent input signals.

10. The circuit of any of claims 1-9, wherein the number of the plurality of input ports, the plurality of output ports, and the plurality of driver-side units are all two.

11. A driver, comprising: a control circuit, a drive signal generation circuit, and the driver-side circuit of any one of claims 1 to 10, and a plurality of light-emitting elements; wherein the content of the first and second substances,

the driving signal generating circuit provides input signals to a plurality of input ports of the driver side circuit under the control of the control circuit; the driver end circuit outputs driving signals to the plurality of light emitting elements through a plurality of output ports, respectively, according to the input signal; the plurality of light emitting elements are connected to a plurality of output ports of the driver end circuit in a one-to-one correspondence.

Technical Field

The present invention relates to semiconductor technologies, and more particularly, to a driver side circuit and a driver.

Background

In semiconductor integrated circuit technology, with the continuous development of process technology, the chip size is smaller and smaller, the integration level is higher and higher, and thus the process requirements on the chip are higher and higher.

Currently, a driver-side circuit is provided in a semiconductor-integrated driving circuit, and the driver-side circuit is generally adapted to a driven element to output a driving signal adapted to the driven element. In connection with a light emitting device driving scenario, for example, in an LED driving circuit, an LED driving end circuit is provided for performing voltage-to-current processing to adapt to the requirements of the LED on the driving signal. And a driver side circuit configured by corresponding structural elements according to a scene of an application.

However, the structural elements usually have deviations, for example, the semiconductor process has process deviations, so that the output of the driver end circuit where the structural elements are located has deviations, which affects the output characteristics of the driver end, and further affects the actual driving effect.

Disclosure of Invention

The application provides a driver end circuit and a driver, which are used for averaging the deviation of each output port so as to improve the output characteristic of the driver end.

In a first aspect, the present application provides a driver side circuit comprising: a plurality of input ports, a plurality of output ports, a plurality of driver side units, and at least one path switching unit;

In one possible design, the first structure includes a resistor, and the second structure includes an amplifier and a transistor element;

In one possible design, the first input terminal of the amplifier in each driver-side unit, as the input terminal of the second structure of the driver-side unit, is connected to the corresponding input port; a second input end of the amplifier is connected with a second end of the transistor element in the driver end unit; the output end of the amplifier is connected with the control end of the transistor element in the driver end unit;

In one possible design, the first structure includes an amplifier and a resistor; the second structure comprises a transistor element; the path switching unit comprises a first path switching unit and a second path switching unit;

In one possible design, the first input terminal of the amplifier in each driver terminal unit, which is the input terminal of the first structure in the driver terminal unit, is correspondingly connected to the plurality of output terminals of the first path switching unit; a second input terminal of the amplifier and an output terminal of the amplifier, as a set of output terminals of the first structure, are correspondingly connected to a set of input terminals of the second path switching unit;

one end of the resistor in each driver end unit is connected with the second input end of the amplifier in the driver end unit, and the other end of the resistor is grounded;

In one possible design, the first structure includes amplifier, resistor and transistor elements, and the second structure is empty; the path switching unit comprises a first path switching unit and a second path switching unit;

In one possible design, the first input terminal of the amplifier in each driver terminal unit, which is the input terminal of the first structure in the driver terminal unit, is correspondingly connected to the plurality of output terminals of the first path switching unit; a second input terminal of the amplifier is connected to a second terminal of the transistor element and one terminal of the resistor in the driver terminal unit; the output end of the amplifier is connected with the control end of the transistor element;

In one possible design, the path switching unit is configured to change the internal conduction path at different times to complete multiple cycles within a predetermined period; each cycle comprises that each input port is connected to the output port corresponding to the input port through the first structure of different driver end units and the second structure of the driver end unit corresponding to the input port.

In one possible design, the predetermined period includes a time interval between the driver-side circuit receiving two adjacent input signals.

In one possible design, the number of the plurality of input ports, the number of the plurality of output ports, and the number of the plurality of driver-side units are all two.

In a second aspect, the present application provides a driver comprising: a control circuit, a drive signal generation circuit, and the driver side circuit as described in the first aspect above, and a plurality of light emitting elements; wherein the content of the first and second substances,

The application provides a driver terminal circuit and a driver, through set up at least one route switching unit before the first structure of driver end unit to change the inside conduction route of route switching unit under different moments, so that every input port of driver terminal circuit in predetermined cycle, accomplish through the first structure of different driver end units and the second structure of the driver end unit that this input port corresponds, be connected to the output port that this input port corresponds. In the scheme, the path switching unit is used for changing an internal path to control the input signal of each input port, the input signal is alternately output after passing through the first structures of the different driver end units, and the output deviation averaging between the input ports is realized, so that the output characteristic of the driver end is improved, and the actual driving effect is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of a driver end circuit in the related art;

fig. 2 is a schematic structural diagram of a driver end circuit according to an embodiment of the present disclosure;

fig. 3a and fig. 3b are schematic structural diagrams of a driver end circuit according to a second embodiment of the present application;

fig. 4a and 4b are schematic structural diagrams of a driver end circuit according to a third embodiment of the present application;

fig. 5a and 5b are schematic structural diagrams of a driver end circuit according to a fourth embodiment of the present disclosure.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples representing devices and methods consistent with aspects of the present application.

The terms "comprising" and "having" are used in this application to mean an open-ended inclusion, and to mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects. Further, the different elements and regions in the drawings are only schematically shown, and thus the present application is not limited to the dimensions or distances shown in the drawings.

The driver side circuit and the driver provided by the embodiments of the present application can be applied to various driver scenarios, and for example, the driver side circuit and the driver can be applied to the driver side circuit scenarios including but not limited to LEDs.

Fig. 1 is a schematic diagram of a driver end circuit in the related art. As shown in fig. 1, includes: an input port 11, a driver port 12, an output port 13 and an LED device 14. Wherein the driver end 12 includes a plurality of driver end units (two driver end units are shown as an example, it is understood that the present invention is not limited to the examples shown in the drawings). The driver-side circuit typically adapts a driven element to output a driving signal adapted to the driven element. The LED driving circuit is provided with an LED driving end circuit for executing voltage-to-current processing to adapt to the requirements of the LED device on the driving signal.

The LED is a solid light source, and when a forward voltage is applied across the LED, minority carriers and majority carriers in the semiconductor recombine, and excess energy released causes photons to be emitted. Different materials are adopted to manufacture the light emitting diodes with different colors. In practice, LEDs cannot directly use the conventional mains grid voltage. Therefore, in order to satisfy the voltage and current requirements of LED driving, voltage conversion processing is required to make the LED normally operate. The main function of the LED driver is to convert the ac voltage to a constant current source to match the voltage and current driven by the LED.

In practical applications, the output characteristics of each output port of the driver side circuit are affected due to Process Variation (Process rounding). For example, in the case where the driving requirements of the LEDs are the same, it is desirable that the output ports of the driver side circuit output the same driving signal. However, even if the input signals to the input ports of the driver side circuit are the same due to the process variations, the process variations are reflected in the driving output from the output ports of the driver side circuit, and the output characteristics of the driver side circuit are affected.

In view of the above, an embodiment of the present application provides a driver end circuit and a driver. The deviation of each output port of the driver side circuit is alternated by controlling the change of the internal path of the path switching unit, so as to achieve the effect of averaging the deviation, thereby improving the output characteristic of the driver side circuit. The present application will be described in detail with reference to examples. The following specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Example one

Fig. 2 is a schematic structural diagram of a driver end circuit according to an embodiment of the present disclosure. The embodiment provides a driver-side circuit for averaging an output deviation of the driver-side circuit, as shown in fig. 2, the driver-side circuit including: a plurality of input ports 21, a plurality of driver-side units 22, a plurality of output ports 23, and at least one path switching unit 24. It should be noted that the drawings are merely examples, and the number, position, and the like of each configuration are not limited.

Each driver end unit 22 includes a first structure 222 and a second structure 221, the first structure 222 including at least one of the constituent elements of the driver end unit 22, the second structure 221 including a constituent element other than the first structure 222 in the driver end unit 22;

at least one path switching unit 24 is connected before the first structure 222, and is configured to change the internal conduction path at different times, so that each input port 21 is connected to the output port 23 corresponding to the input port 21 through the first structure 222 of a different driver end unit 22 and the second structure 221 of the driver end unit 22 corresponding to the input port 21 in a predetermined period.

The path switching unit is used for selectively changing an internal conduction path, namely changing a signal path between each input and each output of the path switching unit. In one example, the path switching unit may include, but is not limited to, a multiple-input multiple-output data selector.

In connection with the illustrated structure, for example:

in a first period, a first input signal and a second input signal are respectively input to the second structure of the driver end unit 1 and the second structure of the driver end unit 2 through the input port 1 and the input port 2, and then input to the input ends of the path switching unit 24, at this time, the conduction path inside the path switching unit 24 includes a conduction path between the second structure of the driver end unit 1 and the first structure of the driver end unit 1, and a conduction path between the second structure of the driver end unit 2 and the first structure of the driver end unit 2, so that the first input signal is under the action of the first structure of the driver end unit 1, and the second input signal is under the action of the first structure of the driver end unit 2, and finally reaches the output port 1 and the output port 2 to output the first output signal and the second output signal respectively. In this period, the first output signal and the second output signal reflect the process deviation of the first structure of the driver-side unit 1 and the first structure of the driver-side unit 2, respectively.

In the second period, the first input signal and the second input signal are respectively input to the second structure of the driver-side unit 1 and the second structure of the driver-side unit 2 through the input port 1 and the input port 2, and then input to the respective input terminals of the path switching unit 24, at this time, the conduction path inside the path switching unit 24 includes a conduction path between the second structure of the driver-side unit 1 and the first structure of the driver-side unit 2, and a conduction path between the second structure of the driver-side unit 2 and the first structure of the driver-side unit 1, so that the first input signal is under the action of the first structure of the driver-side unit 2, and the second input signal is under the action of the first structure of the driver-side unit 1, and finally reaches the output port 1 and the output port 2 to output the first output signal and the second output signal, respectively. In this period, the first output signal and the second output signal reflect the process deviation of the first structure of the driver-side unit 2 and the first structure of the driver-side unit 1, respectively.

That is, the internal conduction path is changed by the path switching unit 24 at different timings (which may be switched at each timing, or may refer to a timing at the end of a different period) so that each input port 21 completes the averaged output by the first structure 222 of a different driver-side unit 22 and the second structure 221 of the driver-side unit 22 corresponding to the input port 21 in a predetermined cycle, so that the output deviation of the output port 23 corresponding to the input port 21 is obtained. As used herein, a signal "passes through" a structure, including but not limited to a signal flowing through the structure and a signal flowing through the structure to another structure in a subsequent sequence, such as a load.

In one example, the path switching unit 24 is used to change the internal conduction path at different times to complete multiple cycles within a predetermined period; each cycle comprises that each input port is connected to the output port corresponding to the input port through the first structure of different driver end units and the second structure of the driver end unit corresponding to the input port. In the embodiment, a plurality of cycles are realized in a preset period, the alternating frequency of structural elements is increased, and therefore output flicker is reduced.

In one example, the predetermined period may include a period of an interval between the driver-side circuit receiving two adjacent input signals. That is, at least one cycle is completed in the interval duration between two input signals to achieve output offset averaging and improve the output characteristics of the driver side circuit.

Specifically, the input signal of the driver side circuit may be a signal having a duty ratio, and as used herein, the duration of an interval between two adjacent input signals refers to an interval between two adjacent input times of a single input signal.

In practical applications, the number of structures, such as the input port, the output port, and the driver-side unit, may be determined according to needs, for example, in an LED driving scenario, the number of LEDs may be determined. In one example, the number of the plurality of input ports, the plurality of output ports, and the plurality of driver side units may each be two.

In the driver-side circuit provided in this embodiment, at least one path switching unit is disposed before the first structure of the driver-side unit, so as to change the internal conduction path of the path switching unit at different times, so that each input port of the driver-side circuit is connected to the output port corresponding to the input port through the first structure of different driver-side units and the second structure of the driver-side unit corresponding to the input port within a predetermined period. In the scheme, the path switching unit is used for changing an internal path to control the input signal of each input port, the input signal is alternately output after passing through the first structures of the different driver end units, and the output deviation averaging between the input ports is realized, so that the output characteristic of the driver end is improved, and the actual driving effect is improved.

Example two

Fig. 3a and fig. 3b are schematic structural diagrams of a driver end circuit according to a second embodiment of the present application. The embodiment provided by the application is based on the first embodiment, and takes a scene of LED driving as an example, and the specific structural elements included in the first structure are related to each other. The embodiment provides a driver-side circuit for improving the problem of the output deviation of the driver-side circuit. As shown in fig. 3a, in the first embodiment, the first structure 222 includes a resistor, and the second structure 221 includes an amplifier and a transistor element;

each input port 21 is connected to an input terminal of the second structure 221 of the corresponding driver-side unit 22, and a first output terminal of the second structure 221 of the driver-side unit 22 is connected to the output port 23 corresponding to the input port 21;

a second output terminal of the second structure 221 in the driver terminal units 22 is correspondingly connected to the input terminals of the path switching unit 24; a plurality of output ends of the path switching unit 24 are correspondingly connected with one ends of the resistors in the driver end units 22, and the other ends of the resistors are grounded;

the path switching unit 24 is configured to change the internal conduction path at different times, so that each input port 21 is connected to the output port 23 corresponding to the input port 21 through the second structure of the driver-side unit 22 corresponding to the input port 21 and the first structure 222 of the different driver-side unit 22 in a predetermined period.

Combining a scene example: the present embodiment is exemplified in connection with a LED driving scenario, and in practical applications, the structural elements of the driver end unit applied in the LED driving scenario may include a resistor, an amplifier, and a transistor element. The present embodiment exemplifies a scheme in an alternating manner in which the first structure includes a resistor and the second structure includes an amplifier and a transistor element.

In connection with the example in the figure, the input port 21 includes an input port 1 and an input port 2, the corresponding driver end units are a driving end unit 1 and a driver end unit 2, respectively, and the corresponding output ports 23 are an output port 1 and an output port 2, respectively. The first structure in the driver terminal unit 1 includes a resistor R1, and the second structure of the driver terminal unit 1 includes an amplifier AMP1 and a transistor MOS 1; the first structure in the driver terminal unit 2 includes a resistor R2, and the second structure in the driver terminal unit 2 includes an amplifier AMP2 and a transistor MOS 2; that is, in the present embodiment, the component for the alternating deviation is the resistance.

In one example, a first input of the amplifier in each driver-side unit 22, which is the input of the second structure of that driver-side unit, is connected to the corresponding input port; the second input end of the amplifier is connected with the second end of the transistor in the driver end unit; the output end of the amplifier is connected with the control end of the transistor in the driver end unit;

the first terminal of the transistor element in each driver-side unit 22, as the first output terminal of the second structure in that driver-side unit, is connected to the corresponding output port; a second terminal of the transistor element, which is a second output terminal of the second structure in the driver terminal unit, is correspondingly connected to the input terminal of the path switching unit 24.

By way of example, the input port 1 is connected to a first input terminal of the amplifier AMP1 of the second configuration in the corresponding driver terminal unit 1, a second input terminal of the amplifier AMP1 is connected to a second terminal of the transistor element MOS1 of the second configuration in the driver terminal unit 1 corresponding to the input port 1, and an output terminal of the amplifier AMP1 is connected to a control terminal, i.e., a gate, of the transistor element MOS 1; the input port 2 is connected to a first input terminal of the amplifier AMP2 of the second configuration in the corresponding driver terminal unit 2, a second input terminal of the amplifier AMP2 is connected to a second terminal of the transistor element MOS2 of the second configuration in the driver terminal unit 2 to which the input port 2 corresponds, and an output terminal of the amplifier AMP2 is connected to a control terminal, i.e., a gate, of the transistor element MOS 2.

The second terminal of the transistor MOS1 in the second structure of the driver terminal unit 1 corresponds to one input terminal of the connection path switching unit 24, and the first terminal of the MOS1 corresponds to the output port 1 corresponding to the input port 1; one output end of the path switching unit 24 is correspondingly connected to one end of the resistor R1 in the first structure of the driver end unit 1, and the other end of the resistor R1 is grounded; the second end of the MOS2 in the second structure of the driver end unit 2 corresponds to one input end of the connection path switching unit 24, and the first end of the MOS2 corresponds to the output port 2 corresponding to the input port 2; the output terminal of the path switching unit 24 is connected to one terminal of the resistor R2 in the first structure of the driver terminal unit 2, and the other terminal of the resistor R2 is grounded.

The path switching unit 24 is configured to change the internal conduction path at different times, so that the input port 1 is connected to the output port 1 corresponding to the input port 1 through the second structure in the driver-side unit 1 corresponding to the input port 1 and the first structure of a different driver-side unit in a predetermined period; the input port 2 is also made to be similarly connectable to the output port 2 corresponding to the input port 2 through the second configuration in the driver-side unit 2 corresponding to the input port 2 and the first configuration of the different driver-side unit in a predetermined cycle.

Wherein the first input terminal of the amplifier AMP1 in the second configuration of the driver side unit 1, as the input terminal of the second configuration of the driver side unit 1, is connected to the input port 1; the first input terminal of the amplifier AMP2 in the second configuration of the driver-side unit 2, as an input terminal in the second configuration of the driver-side unit 2, is connected to the corresponding input port 2; a first terminal of the transistor element MOS1 of the second structure in the driver-side unit 1, as a first output terminal of the second structure in the driver-side unit 1, is connected to the corresponding output port 1; a second terminal of the transistor MOS1 of the second structure in the driver terminal unit 1, which is a second output terminal of the second structure in the driver terminal unit 1, is correspondingly connected to the input terminal of the path switching unit 24; similarly, the first terminal of the transistor element MOS2 of the second structure in the driver-side unit 2, as the first output terminal of the second structure in the driver-side unit 2, is connected to the corresponding output port 2; a second terminal of the transistor MOS2 of the second structure in the driver side unit 2, which is a second output terminal of the second structure in the driver side unit 2, is correspondingly connected to the input terminal of the path switching unit 24.

In connection with the illustrated structure, for example, path switching unit 24 is responsive to a control signal. An example of the operation of the driver-side circuit is as follows:

in the first period, as shown in fig. 3a, the internal conduction path of the path switching unit 24 includes: a conductive path between a second terminal of MOS1 and a first terminal of R1, and a conductive path between a second terminal of MOS2 and a first terminal of R2.

Accordingly, the input port 1 receives the input signal in1, the input signal in1 is transmitted to the input end of the driver end unit 1, passes through the amplifier AMP1 and the transistor MOS1 in the second structure of the driver end unit 1, and realizes the V-I conversion function under the action of R1, and is transmitted to the output port 1 from the first end of the MOS1, and outputs the current signal I (OUT1) + I (Δ 1); where I (Δ 1) characterizes an output deviation due to a process deviation of R1, and the output current signal is transmitted as a driving signal to the LED device 1 connected to the output port 1. Specifically, due to the existence of semiconductor process deviation, there is a current output deviation I (Δ 1) in the output signal of the driver-side unit 1, and at this time, the output current IOUT1 in the first period can be obtained through the output port 1: OUT1 ═ I (OUT1) + I (Δ 1); where I (OUT1) is the ideal output under process variation without taking into account resistance.

Similarly, the input port 2 receives an input signal in2, the input signal in2 is transmitted to the input end of the driver end unit 2, passes through the amplifier AMP2 and the transistor MOS2 in the second structure of the driver end unit 2, and realizes the V-I conversion function under the action of R2, and is transmitted to the output port 2 from the first end of the MOS2, and outputs a current signal I (OUT2) + I (Δ 2); where I (Δ 2) characterizes an output deviation due to the process deviation of R2, and the output current signal is transmitted as a driving signal to the LED device 2 connected to the output port 2. Due to the existence of semiconductor process variations, the output current through the driver-side unit 2 varies by I (Δ 2), and the output current IOUT2 in the first period is obtained through the output port 2: IOUT2 ═ I (OUT2) + I (Δ 2); where I (OUT2) is the ideal output under process variation without taking into account resistance.

In the second period, as shown in fig. 3b, the internal conduction path of the path switching unit 24 is changed. Specifically, the internal conduction path of the path switching unit 24 includes: a conductive path between a second terminal of MOS1 and a first terminal of R2, and a conductive path between a second terminal of MOS2 and a first terminal of R1.

Accordingly, the input port 1 receives the input signal in1, the input signal in1 is transmitted to the input end of the driver end unit 1, passes through the amplifier AMP1 and the transistor MOS1 in the second structure of the driver end unit 1, and realizes the V-I conversion function under the action of R2, and is transmitted to the output port 1 from the first end of the MOS1, and outputs the current signal I (OUT1) + I (Δ 2); where I (Δ 2) characterizes an output deviation due to a process deviation of R2, and the output current signal is transmitted as a driving signal to the LED device 1 connected to the output port 1. Specifically, due to the existence of the semiconductor process deviation, there is a current output deviation I (Δ 2) in the output signal of the driver-side unit 1, and at this time, the output current IOUT1 in the second period can be obtained through the output port 1: IOUT1 ═ I (OUT1) + I (Δ 2); where I (OUT1) is the ideal output under process variation without taking into account resistance.

Similarly, the input port 2 receives an input signal in2, the input signal in2 is transmitted to the input end of the driver end unit 2, passes through the amplifier AMP2 and the transistor MOS2 in the second structure of the driver end unit 2, and realizes the V-I conversion function under the action of R1, and is transmitted to the output port 2 from the first end of the MOS2, and outputs a current signal I (OUT2) + I (Δ 1); where I (Δ 1) characterizes an output deviation due to the process deviation of R1, and the output current signal is transmitted as a driving signal to the LED device 2 connected to the output port 2. Due to the existence of the semiconductor process deviation, the output current through the driver-side unit 2 is deviated by I (Δ 1), and the output current IOUT2 in the second period is obtained through the output port 2: IOUT2 ═ I (OUT2) + I (Δ 1); where I (OUT2) is the ideal output under process variation without taking into account resistance.

With reference to the above example, it can be understood that, in the present embodiment, by changing the internal conduction path of the path switching unit, the resistances of different driver end units are alternated, so that each output port outputs the deviation corresponding to the alternating structural element with different driver end units at different times, thereby implementing deviation averaging and improving the output characteristics of the entire driver end circuit. For example, in the above example, two driver end units are included, and accordingly, the alternation of the resistance can be realized through two time periods, so as to average the deviation caused by the resistance.

In the driver side circuit provided in this embodiment, considering the output deviation due to the resistance, the resistance is alternately replaced as the first structure, and the remaining structural elements are not alternately replaced as the second structure, and the internal conduction path of the path switching unit is changed to alternately output the driving signal under the resistance action of the different driver side units at different times, thereby achieving the effect of averaging the output deviation of the driver side circuit and improving the output characteristics of the driver side circuit.

EXAMPLE III

Fig. 4a and 4b are schematic structural diagrams of a driver end circuit according to a third embodiment of the present application. The embodiment provided by the application is based on the first embodiment, and also takes a scene of driving the LEDs as an example, and relevant examples are performed on specific structural elements included in the first structure. The embodiment provides a driver-side circuit for improving the problem of the output deviation of the driver-side circuit. As shown in fig. 4a, in the first embodiment, the first structure 222 in the driver-side unit of the driver-side circuit includes an amplifier and a resistor, and the second structure 221 includes a transistor element; the path switching unit 24 includes a first path switching unit 41 and a second path switching unit 42;

the input port 21 is correspondingly connected with a plurality of input ends of the first path switching unit 41, and a plurality of output ends of the first path switching unit 41 are correspondingly connected with input ends of a first structure in the driver end unit 22;

the output end of the first structure 222 in the plurality of driver end units 22 is correspondingly connected with the input ends of the second path switching unit 42, and the output ends of the second path switching unit 42 are correspondingly connected with the input ends of the second structure 221 in the plurality of driver end units 22; the output ends of the second structures 221 in the plurality of driver end units 22 are correspondingly connected with the plurality of output ports 23;

the first path switching unit 41 and the second path switching unit 42 are configured to change the internal conduction path at different times, so that each input port 21 is connected to the output port 23 corresponding to the input port 21 through the first structure 222 of a different driver-side unit 22 and the second structure 221 of the driver-side unit 22 corresponding to the input port 21 in a predetermined period.

Combining a scene example: the present embodiment is exemplified in connection with a LED driving scenario, and in practical applications, the structural elements of the driver end unit applied in the LED driving scenario may include a resistor, an amplifier, and a transistor element. This embodiment exemplifies a scheme in an alternate manner in which the first structure includes an amplifier and a resistor, and the second structure includes a transistor element.

In connection with the example in the figure, the input port 21 includes an input port 1 and an input port 2, the corresponding driver end units are a driving end unit 1 and a driver end unit 2, respectively, and the corresponding output ports 23 are an output port 1 and an output port 2, respectively. The first structure in the driver terminal unit 1 includes an amplifier AMP1 and a resistor R1, and the second structure of the driver terminal unit 1 includes a transistor MOS 1; the first structure in the driver terminal unit 2 includes an amplifier AMP2 and a resistor R2, and the second structure in the driver terminal unit 2 includes a transistor MOS 2; that is, in the present embodiment, the components for the alternating deviation are an amplifier and a resistor.

In one example, a first input terminal of the amplifier in each driver-side unit 22, which is an input terminal of the first structure 222 in the driver-side unit 22, is correspondingly connected to a plurality of output terminals of the first path switching unit 41; a second input terminal of the amplifier and an output terminal of the amplifier, which are a set of output terminals of the first structure 222, are correspondingly connected to a set of input terminals of the second path switching unit 42;

one end of the resistor in each driver-side unit 22 is connected to the second input terminal of the amplifier in that driver-side unit 22, and the other end of the resistor is grounded; the control terminal and the second terminal of the transistor element in each driver-side unit 22, which are a set of ports of the second structure 221 in the driver-side unit, are correspondingly connected to a set of output terminals of the second path switching unit 42; the first terminals of the transistor elements are connected as output terminals of the second structure 221 in the driver terminal unit 22 to the corresponding output port 23.

In connection with the illustrated example, the input port 1 is correspondingly connected to one input end of the first path switching unit 41, and one output end of the first path switching unit 41 is correspondingly connected to a first input end of the amplifier AMP1 in the first configuration of the driver terminal unit 1; the input port 2 is correspondingly connected to an input terminal of the first path switching unit 41, and an output terminal of the first path switching unit 41 is correspondingly connected to a first input terminal of the amplifier AMP2 in the first configuration of the driver terminal unit 2.

The output terminal of the amplifier AMP1 in the first structure of the driver terminal unit 1 is used as the first output terminal of the first structure of the driver terminal unit 1 and is correspondingly connected to the first input terminal of the group of input terminals of the second path switching unit 42, and the first output terminal of the group of output terminals of the second path switching unit 42 is correspondingly connected to the control terminal, i.e., the gate terminal, of the transistor element MOS1 in the second structure of the driver terminal unit 1; after the second input terminal of the amplifier AMP1 is connected to the first terminal of the resistor R1, the second output terminal as the first structure in the driver terminal unit 1 is correspondingly connected to the second input terminal of the same group of input terminals of the second path switching unit 42, and the second output terminal of the same group of output terminals of the second path switching unit 42 is correspondingly connected to the second terminal of the transistor element MOS 1; a first terminal of the transistor MOS1 is connected to the output port 1 as an output terminal of the second configuration of the driver terminal unit 1.

The output terminal of the amplifier AMP2 in the first configuration of the driver terminal unit 2 is connected as the first output terminal of the first configuration of the driver terminal unit 2 to the first input terminal of the set of input terminals of the second path switching unit 42, and the first output terminal of the set of output terminals of the second path switching unit 42 is connected to the control terminal, i.e., the gate terminal, of the transistor element MOS2 in the second configuration of the driver terminal unit 2; after the second input terminal of the amplifier AMP2 is connected to the first terminal of the resistor R2, the second output terminal of the first structure in the driver terminal unit 2 is correspondingly connected to the second input terminal of the same group of input terminals of the second path switching unit 42, and the second output terminal of the same group of output terminals of the second path switching unit 42 is correspondingly connected to the second terminal of the transistor element MOS2 in the second structure of the driver terminal unit 2; a first terminal of the transistor MOS2 is connected to the output port 2 as an output terminal of the second configuration of the driver terminal unit 2.

The first path switching unit 41 and the second path switching unit 42 are configured to change the internal conduction path at different times, so that the input port 1 is connected to the output port 1 corresponding to the input port 1 through the first structure in different driver-side units and the second structure of the driver-side unit 1 corresponding to the input port 1 in a predetermined period; the input port 2 is also made to be similarly connectable to the output port 2 corresponding to the input port 2 through the first configuration in the different driver-side unit and the second configuration of the driver-side unit 2 corresponding to the input port 2 in a predetermined cycle.

Wherein, a first input terminal of the amplifier AMP1 in the first configuration of the driver terminal unit 1, as an input terminal of the first configuration 222 of the driver terminal unit 1, is correspondingly connected to one output terminal of the first path switching unit 41; a second input terminal of the amplifier AMP1 and an output terminal of the amplifier AMP1 as a set of output terminals of the first configuration of the driver terminal unit 1 are correspondingly connected to a set of input terminals of the second path switching unit 42; a first input terminal of the amplifier AMP2 in the first configuration of the driver-side unit 2, as an input terminal of the first configuration of the driver-side unit 2, is correspondingly connected to one output terminal of the first path switching unit 41; a second input terminal of the amplifier AMP2 and an output terminal of the amplifier AMP2, which are a set of output terminals of the first configuration of the driver terminal unit 2, are correspondingly connected to a set of input terminals of the second path switching unit 42.

One end of the resistor R1 in the first configuration of the driver terminal unit 1 is connected to the second input terminal of the amplifier AMP1 in the first configuration of the driver terminal unit 1, and the other end of the resistor R1 is grounded; one end of the resistor R2 in the first configuration of the driver terminal unit 2 is connected to the second input terminal of the amplifier AMP2 in the first configuration of the driver terminal unit 2, and the other end of the resistor R2 is grounded; the control terminal and the second terminal of the transistor element MOS1 in the second configuration of the driver terminal unit 1, which are a set of ports of the second configuration in the driver terminal unit 1, are correspondingly connected to a set of output terminals of the second path switching unit 42; a first terminal of the transistor element MOS1, an output terminal as the second structure in the driver terminal unit 1 is connected to the corresponding output port 1; the control terminal and the second terminal of the transistor element MOS2 in the second configuration of the driver-side unit 2, as a set of ports of the second configuration in the driver-side unit 2, are correspondingly connected to a set of output terminals of the second path switching unit 42; a first terminal of the transistor element MOS2, an output terminal as the second structure in the driver terminal unit 2, is connected to the corresponding output port 2.

In the present embodiment, the path switching unit 24 includes a first path switching unit 41 and a second path switching unit 42. In connection with the illustrated structure, for example, path switching unit 24 is responsive to a control signal. An example of the operation of the driver-side circuit is as follows:

in the first period, as shown in fig. 4a, the internal conduction path of the first path switching unit 41 includes: a conductive path between input port 1 and a first input terminal of amplifier AMP1, and a conductive path between input port 2 and a first input terminal of amplifier AMP 2. The internal conduction path of the second path switching unit 42 includes: a conduction path between the output terminal of the amplifier AMP1 and the control terminal of the transistor element MOS1, and a conduction path between the second input terminal of the amplifier AMP1 and the second terminal of the transistor element MOS 1; a conduction path between the output terminal of the amplifier AMP2 and the control terminal of the transistor element MOS2, and a conduction path between the second input terminal of the amplifier AMP2 and the second terminal of the transistor element MOS2 are also included.

Accordingly, the input port 1 receives the input signal in1, the input signal in1 is transmitted to the input terminal of the first path switching unit 41, and is transmitted from the output terminal of the first path switching unit 41 to the input terminal of the driver terminal unit 1, and V-I conversion function is realized through the resistor R1 and the amplifier AMP1 of the first structure in the driver terminal unit 1, and the transistor element MOS1, so as to obtain a set of output signals. An output signal of the input signal in1 after passing through the amplifier AMP1 and the resistor R1 is transmitted to an input end of the second path switching unit 42, and by using the selected output characteristic of the path switching unit 42, the output signal is transmitted to the transistor element MOS1 in the second structure of the driver terminal unit 1, and is transmitted to the output port 1 from the first end of the transistor element MOS1, so as to obtain an output current signal I (OUT1) + I (Δ 1); where I (Δ 1) represents an output deviation due to a process deviation of the amplifier AMP1 and the resistor R1, and the output current signal is transmitted as a driving signal to the LED device 1 connected to the output port 1. Specifically, due to the existence of semiconductor process deviation, there is a current output deviation I (Δ 1) in the output signal passing through the driver end unit 1, and at this time, the actual output current IOUT1 in the first period of time can be obtained through the output port 1: IOUT1 ═ I (OUT1) + I (Δ 1); where I (OUT1) is the ideal output without regard to process variations of amplifier and resistance.

Similarly, the input port 2 receives the input signal in2, the input signal in2 is transmitted to the input terminal of the first path switching unit 41, and is transmitted from the output terminal of the first path switching unit 41 to the input terminal of the driver terminal unit 2, and V-I conversion function is realized through the resistor R2 and the amplifier AMP2 of the first structure in the driver terminal unit 2, and the transistor element MOS2, so as to obtain a set of output signals. The output signal after passing through the amplifier AMP2 and the resistor R2 is transmitted to the input terminal of the second path switching unit 42, and by using the selected output characteristic of the path switching unit 42, the output signal is transmitted to the transistor element MOS2 in the second structure of the driver terminal unit 2, and is transmitted to the output port 2 from the first terminal of the transistor element MOS2, so as to obtain an output current signal I (OUT2) + I (Δ 2); where I (Δ 2) represents an output deviation due to a process deviation of the amplifier AMP2 and the resistor R2, and the output current signal is transmitted as a driving signal to the LED device 2 connected to the output port 2. Specifically, due to the existence of semiconductor process deviation, there is a current output deviation I (Δ 2) in the output signal passing through the driver-side unit 2, and at this time, the actual output current IOUT2 in the first period of time can be obtained through the output port 2: IOUT2 ═ I (OUT2) + I (Δ 2); where I (OUT2) is the ideal output without regard to process variations of amplifier and resistance.

In the second period, as shown in fig. 4b, the internal conduction paths of the first path switching unit 41 and the second path switching unit 42 are changed. Specifically, the internal conduction path of the first path switching unit 41 includes: a conductive path between input port 1 and a first input terminal of amplifier AMP2, and a conductive path between input port 2 and a first input terminal of amplifier AMP 1. The internal conduction path of the second path switching unit 42 includes: a conduction path between the output terminal of the amplifier AMP1 and the control terminal of the transistor element MOS2, and a conduction path between the second input terminal of the amplifier AMP1 and the second terminal of the transistor element MOS 2; a conduction path between the output terminal of the amplifier AMP2 and the control terminal of the transistor element MOS1, and a conduction path between the second input terminal of the amplifier AMP2 and the second terminal of the transistor element MOS1 are also included.

Accordingly, the input port 1 receives the input signal in1, the input signal in1 is transmitted to the input terminal of the first path switching unit 41, and is transmitted from the output terminal of the first path switching unit 41 to the input terminal of the driver terminal unit 2, and V-I conversion function is realized through the resistor R2 and the amplifier AMP2 of the first structure in the driver terminal unit 2, and the transistor element MOS1, so as to obtain a set of output signals. The output signal after passing through the amplifier AMP2 and the resistor R2 is transmitted to the input terminal of the second path switching unit 42, and by using the selected output characteristic of the path switching unit 42, the output signal is transmitted to the transistor element MOS1 in the second structure of the driver terminal unit 1, and is transmitted to the output port 1 from the first terminal of the transistor element MOS1, so as to obtain an output current signal I (OUT1) + I (Δ 2); where I (Δ 2) represents an output deviation due to a process deviation of the amplifier AMP2 and the resistor R2, and the output current signal is transmitted as a driving signal to the LED device 1 connected to the output port 1. Specifically, due to the existence of the semiconductor process deviation, there is a current output deviation I (Δ 2) in the output signal passing through the driver-side unit 2, and at this time, the actual output current IOUT1 passing through the second period can be obtained through the output port 1: IOUT1 ═ I (OUT1) + I (Δ 2); where I (OUT1) is the ideal output without regard to process variations of amplifier and resistance.

Similarly, the input port 2 receives the input signal in2, the input signal in2 is transmitted to the input terminal of the first path switching unit 41, is transmitted from the output terminal of the first path switching unit 41 to the input terminal of the driver terminal unit 1, and implements a V-I conversion function through the resistor R1 and the amplifier AMP1 of the first structure in the driver terminal unit 1, and the transistor element MOS2, to obtain a set of output signals. The output signal after passing through the amplifier AMP1 and the resistor R1 is transmitted to the input terminal of the second path switching unit 42, and by using the selected output characteristic of the path switching unit 42, the output signal is transmitted to the transistor element MOS2 in the second structure of the driver terminal unit 2, and is transmitted to the output port 2 from the first terminal of the transistor element MOS2, so as to obtain an output current signal I (OUT2) + I (Δ 1); where I (Δ 1) represents an output deviation due to a process deviation of the amplifier AMP1 and the resistor R1, and the output current signal is transmitted as a driving signal to the LED device 2 connected to the output port 2. Specifically, due to the existence of semiconductor process deviation, there is a current output deviation I (Δ 1) in the output signal passing through the driver end unit 1, and at this time, the actual output current IOUT2 passing through the second period can be obtained through the output port 2: IOUT2 ═ I (OUT2) + I (Δ 1); where I (OUT2) is the ideal output without regard to process variations of amplifier and resistance.

With reference to the above example, it can be understood that in the present embodiment, by changing the internal conduction path of the path switching unit, the amplifiers and the resistors of different driver end units are alternated, so that each output port outputs the deviation corresponding to the alternating structural element with different driver end units at different times, thereby implementing deviation averaging and improving the output characteristics of the whole driver end circuit. For example, in the above example, two driver terminal units are included, and accordingly, the alternation of the amplifier and the resistor of the first structure can be realized by two periods, so as to average the deviation caused by the amplifier and the resistor.

In the driver-side circuit provided in this embodiment, the amplifier and the resistor are alternately replaced as the first structure in consideration of the output deviation caused by the amplifier and the resistor, and the remaining structural elements are not alternately replaced as the second structure, and the internal conduction path of the path switching unit is changed to alternately output the driving signal under the action of the amplifier and the resistor of the different driver-side units at different times, thereby achieving the effect of averaging the output deviation of the driver-side circuit and improving the output characteristics of the driver-side circuit.

Example four

Fig. 5a and 5b are schematic structural diagrams of a driver end circuit according to a fourth embodiment of the present disclosure. The embodiment provided by the application is based on the first embodiment, and also takes a scene of driving the LEDs as an example, and relevant examples are performed on specific structural elements included in the first structure. The embodiment provides a driver-side circuit for improving the problem of the output deviation of the driver-side circuit. As shown in fig. 5a, in the third embodiment, the first structure 222 in the driver end unit of the driver end circuit includes an amplifier, a transistor element, and a resistor, and the second structure 221 is empty; the path switching unit 24 still includes a first path switching unit 41 and a second path switching unit 42;

the plurality of input ports 21 are correspondingly connected with the plurality of input ends of the first path switching unit 41, and the plurality of output ends of the first path switching unit 41 are correspondingly connected with the input ends of the first structures 222 in the plurality of driver end units 22;

the output ends of the first structures 222 in the plurality of driver end units 22 are correspondingly connected with the plurality of input ends of the second path switching unit 42, and the plurality of output ends of the second path switching unit 42 are correspondingly connected with the plurality of output ports 23;

the first path switching unit 41 and the second path switching unit 42 are configured to change the internal conduction path at different times so that each input port 21 is connected to the output port 23 corresponding to the input port 21 through the first structure of the different driver-side unit 22 in a predetermined period.

Combining a scene example: the present embodiment is exemplified in connection with a LED driving scenario, and in practical applications, the structural elements of the driver end unit applied in the LED driving scenario may include a resistor, an amplifier, and a transistor element. This embodiment exemplifies a scheme in an alternating manner in which a first structure includes an amplifier, a transistor element, and a resistor, and a second structure is empty.

In connection with the example in the figure, the input port 21 includes an input port 1 and an input port 2, the corresponding driver-side unit 22 is the driver-side unit 1 and the driver-side unit 2, respectively, and the corresponding output port 23 is the output port 1 and the output port 2, respectively. The first structure in the driver terminal unit 1 includes an amplifier AMP1, a transistor element MOS1, and a resistor R1, and the second structure of the driver terminal unit 1 is empty; the first structure in the driver terminal unit 2 includes an amplifier AMP2, a transistor element MOS2, and a resistor R2, and the second structure in the driver terminal unit 2 is empty; that is, in the present embodiment, the components for the alternating deviation are an amplifier, a transistor element, and a resistor.

In one example, a first input terminal of the amplifier in each driver-side unit 22, which is an input terminal of the first structure in the driver-side unit 22, is correspondingly connected to a plurality of output terminals of the first path switching unit 41; a second input terminal of the amplifier is connected to a second terminal of the transistor element and one terminal of the resistor in the driver terminal unit 22; the output end of the amplifier is connected with the control end of the transistor element;

the other end of the resistor in each driver side unit 22 is grounded; the first terminal of the transistor element in each driver terminal unit 22, which is the output terminal of the first structure in the driver terminal unit 22, is correspondingly connected to the input terminal of the second path switching unit 41.

A first input terminal of the amplifier AMP1 in the first configuration of the driver-side unit 1 serves as an input terminal of the first configuration of the driver-side unit 1; the second input terminal of the amplifier AMP1 in the first configuration of the driver terminal unit 1 is connected to the second terminal of the transistor element MOS1 and the first terminal of the resistor R1; the other end of the resistor R1 is grounded; an output terminal of the amplifier AMP1 is connected to a control terminal of the transistor element MOS 1; a first input terminal of the amplifier AMP2 in the first configuration of the driver terminal unit 2 serves as an input terminal of the first configuration of the driver terminal unit 2; the second input terminal of the amplifier AMP2 in the first configuration of the driver terminal unit 2 is connected to the second terminal of the transistor element MOS2 and the first terminal of the resistor R2; the output end of the amplifier AMP2 is connected with the control end of the transistor element MOS 2; the other end of the resistor R2 is connected to ground.

The first path switching unit 41 and the second path switching unit 42 are configured to change the internal conduction path at different times, so that the input port 1 is connected to the corresponding output port 1 of the input port 1 through the first structures of different driver-side units in a predetermined period; the input port 2 is also made to be similarly connectable to the output port 2 corresponding to the input port 2 through the first configuration of the different driver-side unit in a predetermined period.

Wherein the first terminal of the transistor element MOS1 in the first configuration of the driver terminal unit 1, the output terminal as the first configuration of the driver terminal unit 1, is connected to one input terminal of the second path switching unit 42; one output end of the second path switching unit 42 is correspondingly connected with the output port 1; a first terminal of the transistor MOS2 in the first configuration of the driver-side unit 2, an output terminal as the first configuration in the driver-side unit 2 being connected to the other input terminal of the second path switching unit 42; the other output end of the second path switching unit 42 is correspondingly connected with the output port 2.

in the first period, as shown in fig. 5a, the internal conduction path of the first path switching unit 41 includes: a conductive path between input port 1 and a first input terminal of amplifier AMP1, and a conductive path between input port 2 and a first input terminal of amplifier AMP 2. The internal conduction path of the second path switching unit 42 includes: a conduction path between the first terminal of the transistor element MOS1 and the output port 1, and a conduction path between the first terminal of the transistor element MOS2 and the output port 2.

Correspondingly, the input port 1 receives an input signal in1, the input signal in1 is transmitted to the input end of the first path switching unit 41, the output end of the first path switching unit 41 is transmitted to the input end of the driver end unit 1, and a V-I conversion function is realized through the amplifier AMP1 with the first structure, the transistor element MOS1 and the resistor R1 in the driver end unit 1, so as to obtain a group of output signals; the output current signal I (OUT1) + I (Delta 1) is transmitted to the output port 1 from the first end of the transistor element MOS 1; here, I (Δ 1) represents an output deviation due to a process deviation of the amplifier AMP1, the transistor element MOS1, and the resistor R1, and the output current signal is transmitted as a drive signal to the LED device 1 connected to the output port 1. Specifically, due to the existence of semiconductor process deviation, there is a current output deviation I (Δ 1) in the output signal passing through the driver end unit 1, and at this time, the actual output current IOUT1 in the first period of time can be obtained through the output port 1: IOUT1 ═ I (OUT1) + I (Δ 1); where I (OUT1) is the ideal output without regard to process variations of amplifiers, transistors and resistors.

Similarly, an input signal in2 is received through the input port 2, the input signal in2 is transmitted to the input end of the first path switching unit 41, and is transmitted from the output end of the first path switching unit 41 to the input end of the driver end unit 2, and a V-I conversion function is realized through the amplifier AMP2 of the first structure, the transistor element MOS2 and the resistor R2 in the driver end unit 2, so as to obtain a set of output current signals; the output current signal I (OUT2) + I (Delta 2) is transmitted to the output port 2 from the first end of the transistor element MOS 2; here, I (Δ 2) represents an output deviation due to a process deviation of the amplifier AMP2, the transistor element MOS2, and the resistor R2, and the output current signal is transmitted as a drive signal to the LED device 2 connected to the output port 2. Specifically, due to the existence of semiconductor process variations, the signal passing through the output of the driver-side unit 2 has a current output variation I (Δ 2), and at this time, the actual output current IOUT2 in the first period of time can be obtained through the output port 2: IOUT2 ═ I (OUT2) + I (Δ 2); where I (OUT2) is the ideal output without regard to process variations of amplifiers, transistors and resistors.

In the second period, as shown in fig. 5b, the internal conduction paths of the first path switching unit 41 and the second path switching unit 42 are changed. Specifically, the internal conduction path of the first path switching unit 41 includes: a conductive path between input port 1 and a first input terminal of amplifier AMP2, and a conductive path between input port 2 and a first input terminal of amplifier AMP 1. The internal conduction path of the second path switching unit 42 includes: a conduction path between the first terminal of the transistor element MOS1 and the output port 2, and a conduction path between the first terminal of the transistor element MOS2 and the output port 1.

Correspondingly, the input port 1 receives an input signal in1, the input signal in1 is transmitted to the input end of the first path switching unit 41, the output end of the first path switching unit 41 is transmitted to the input end of the driver end unit 2, and a V-I conversion function is realized through the amplifier AMP2 with the first structure, the transistor element MOS2 and the resistor R2 in the driver end unit 2, so as to obtain a group of output signals; the output current signal I (OUT1) + I (Delta 2) is transmitted to the output port 1 from the first end of the transistor element MOS 2; here, I (Δ 2) represents an output deviation due to a process deviation of the amplifier AMP2, the transistor element MOS2, and the resistor R2, and the output current signal is transmitted as a drive signal to the LED device 1 connected to the output port 1. Specifically, due to the existence of the semiconductor process deviation, there is a current output deviation I (Δ 2) in the output signal passing through the driver-side unit 2, and at this time, the actual output current IOUT1 passing through the second period can be obtained through the output port 1: IOUT1 ═ I (OUT1) + I (Δ 2); where I (OUT1) is the ideal output without regard to process variations of amplifiers, transistors and resistors.

Similarly, the input port 2 receives an input signal in2, the input signal in2 is transmitted to the input end of the first path switching unit 41, is transmitted from the output end of the first path switching unit 41 to the input end of the driver end unit 1, and is subjected to a V-I conversion function through the amplifier AMP1 of the first structure, the transistor element MOS1 and the resistor R1 in the driver end unit 1, so as to obtain a set of output signals; the output current signal I (OUT2) + I (Delta 1) is transmitted to the output port 2 from the first end of the transistor element MOS 1; here, I (Δ 1) represents an output deviation due to a process deviation of the amplifier AMP1, the transistor element MOS1, and the resistor R1, and the output current signal is transmitted as a drive signal to the LED device 2 connected to the output port 2. Specifically, due to the existence of semiconductor process deviation, there is a current output deviation I (Δ 1) in the output signal passing through the driver end unit 1, and at this time, the actual output current IOUT2 passing through the second period can be obtained through the output port 2: IOUT2 ═ I (OUT2) + I (Δ 1); where I (OUT2) is the ideal output without regard to process variations of amplifiers, transistors and resistors.

With reference to the above example, it can be understood that the present embodiment alternates the amplifiers, transistors and resistors of different driver end units by changing the internal conduction path of the path switching unit, so that each output port outputs the deviation corresponding to the alternate structural elements with different driver end units at different times, thereby achieving deviation averaging and improving the output characteristics of the entire driver end circuit. For example, in the above example, two driver terminal units are included, and accordingly, the alternation of the amplifier, the transistor, and the resistor of the first configuration may be realized by two periods, thereby averaging the deviations caused by the amplifier, the transistor, and the resistor.

In the driver-side circuit provided in this embodiment, the amplifier, the transistor, and the resistor are alternately replaced as the first structure in consideration of the output deviation caused by the amplifier, the transistor, and the resistor, and the remaining structural elements are not alternately replaced as the second structure.

EXAMPLE five

An embodiment of the present application provides a driver, which includes: a control circuit, a drive signal generation circuit, and a driver side circuit as described in any of the preceding embodiments, and a plurality of light emitting elements; wherein the content of the first and second substances,

In the driver provided by the application, the driver-side circuit is provided with at least one path switching unit in front of the first structure of the driver-side unit, so that the internal conduction path of the path switching unit is changed at different times, and each input port of the driver-side circuit is connected to the output port corresponding to the input port through the first structures of different driver-side units and the second structure of the driver-side unit corresponding to the input port in a predetermined period. In the scheme, the path switching unit is used for changing an internal path to control the input signal of each input port, the input signal is alternately output after passing through the first structures of the different driver end units, and the output deviation averaging between the input ports is realized, so that the output characteristic of the driver end is improved, and the actual driving effect is improved.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

22页详细技术资料下载

上一篇：一种医用注射器针头装配设备

下一篇：一种轻触开关草坪灯控制芯片

Driver end circuit and driver

相关技术

网友询问留言