阅读说明：本技术 控制电路及其应用的显示面板 (Control circuit and display panel applying same ) 是由 王添鸿 奚苏萍 于 2019-09-24 设计创作，主要内容包括：本申请提供一种控制电路及其应用的显示面板,所述控制电路,包括多级移位寄存器,每一移位寄存器包括：一第一开关,所述第一开关的一控制端用以接收一第一控制讯号,所述第一开关的一第一端用以接收所述第一控制讯号,所述第一开关的一第二端电性耦接一第一节点；一第二开关,所述第二开关的一控制端电性耦接所述第一节点,所述第二开关的一第一端用以接收一第一时钟讯号,所述第二开关的一第二端用以接收一第二控制讯号；以及一第三开关,所述第三开关的一控制端电性耦接一第二节点,所述第三开关的一第一端用以接收所述第二控制讯号,所述第三开关的一第二端电性连接一第一低预设电位。(The application provides a control circuit and display panel who uses thereof, control circuit includes multistage shift register, and each shift register includes: a first switch, a control terminal of the first switch being configured to receive a first control signal, a first terminal of the first switch being configured to receive the first control signal, and a second terminal of the first switch being electrically coupled to a first node; a second switch, a control terminal of the second switch being electrically coupled to the first node, a first terminal of the second switch being configured to receive a first clock signal, and a second terminal of the second switch being configured to receive a second control signal; and a third switch, a control end of the third switch is electrically coupled to a second node, a first end of the third switch is used for receiving the second control signal, and a second end of the third switch is electrically connected to a first low preset potential.)

1. A control circuit comprising a plurality of stages of shift registers, each shift register comprising: a first switch, a control terminal of the first switch being configured to receive a first control signal, a first terminal of the first switch being configured to receive the first control signal, and a second terminal of the first switch being electrically coupled to a first node;

a second switch, a control terminal of the second switch being electrically coupled to the first node, a first terminal of the second switch being configured to receive a first clock signal, and a second terminal of the second switch being configured to receive a second control signal; and

a third switch, a control end of the third switch is electrically coupled to a second node, a first end of the third switch is used for receiving the second control signal, and a second end of the third switch is electrically connected to a first low preset potential.

2. The control circuit of claim 1, further comprising a fourth switch, a control terminal of the fourth switch receiving a third control signal, a first terminal of the fourth switch being electrically coupled to the first node, and a second terminal of the fourth switch being electrically connected to a second low default potential.

3. The control circuit of claim 2, further comprising a fifth switch, wherein a control terminal of the fifth switch is electrically coupled to the second node, a first terminal of the fifth switch is electrically coupled to the first node, and a second terminal of the fifth switch is electrically connected to the second low default potential.

4. The control circuit of claim 2, further comprising a sixth switch, a control terminal of the sixth switch being configured to receive the first clock signal, a first terminal of the sixth switch being configured to receive the first clock signal, and a second terminal of the sixth switch being electrically coupled to a third node.

5. The control circuit of claim 4, further comprising a seventh switch, a control terminal of the seventh switch being configured to receive an input signal, a first terminal of the seventh switch being electrically coupled to the third node, and a second terminal of the seventh switch being electrically connected to the second low default potential.

6. The control circuit of claim 4, further comprising an eighth switch, a control terminal of the eighth switch being electrically coupled to the third node, a first terminal of the eighth switch being configured to receive the first clock signal, and a second terminal of the eighth switch being electrically coupled to the second node.

7. The control circuit of claim 5, further comprising a ninth switch, a control terminal of the ninth switch being configured to receive the input signal, a first terminal of the ninth switch being electrically coupled to the second node, and a second terminal of the ninth switch being electrically connected to the second low default potential.

8. The control circuit of claim 4, further comprising a tenth switch having a control terminal for receiving a second clock signal, a first terminal for receiving the second clock signal, and a second terminal electrically coupled to the third node.

9. The control circuit of claim 1, further comprising a storage capacitor having one end electrically coupled to the first node and another end electrically configured to receive the second control signal.

10. A display panel, comprising:

a first substrate; and

a second substrate disposed opposite to the first substrate;

the method is characterized in that: also included is a control circuit comprising a plurality of shift registers, each shift register comprising:

a first switch, a control terminal of the first switch being configured to receive a first control signal, a first terminal of the first switch being configured to receive the first control signal, and a second terminal of the first switch being electrically coupled to a first node;

a second switch, a control terminal of the second switch being electrically coupled to the first node, a first terminal of the second switch being configured to receive a first clock signal, and a second terminal of the second switch being configured to receive a second control signal;

a third switch, a control end of the third switch being electrically coupled to a second node, a first end of the third switch being configured to receive the second control signal, and a second end of the third switch being electrically connected to a first low default voltage;

a fourth switch, a control terminal of the fourth switch being configured to receive a third control signal, a first terminal of the fourth switch being electrically coupled to the first node, and a second terminal of the fourth switch being electrically connected to a second low default potential;

a fifth switch, a control terminal of the fifth switch being electrically coupled to the second node, a first terminal of the fifth switch being electrically coupled to the first node, and a second terminal of the fifth switch being electrically connected to the second low preset potential;

a sixth switch, a control terminal of the sixth switch being configured to receive the first clock signal, a first terminal of the sixth switch being configured to receive the first clock signal, and a second terminal of the sixth switch being electrically coupled to a third node;

a seventh switch, a control terminal of which is configured to receive an input signal, a first terminal of which is electrically coupled to the third node, and a second terminal of which is electrically connected to the second low preset potential;

a control terminal of the eighth switch is electrically coupled to the third node, a first terminal of the eighth switch is configured to receive the first clock signal, and a second terminal of the eighth switch is electrically coupled to the second node;

a ninth switch, a control terminal of which is configured to receive the input signal, a first terminal of which is electrically coupled to the second node, and a second terminal of which is electrically connected to the second low default potential; and

a tenth switch, a control terminal of the tenth switch being configured to receive a second clock signal, a first terminal of the tenth switch being configured to receive the second clock signal, and a second terminal of the tenth switch being electrically coupled to the third node.

Technical Field

The present disclosure relates to display technologies, and particularly to a control circuit and a display panel using the same.

Background

A Liquid Crystal Display (LCD) is a flat panel Display device that displays images by using the characteristics of Liquid Crystal materials, and has advantages of being light and thin, low in driving voltage, low in power consumption, and the like compared to other Display devices. However, the driving circuit of the flat panel liquid crystal display is mainly composed of an external connection IC of the panel, but this method cannot reduce the cost of the product and also cannot make the panel thinner.

And a gate driving circuit, a source driving circuit, and a pixel array are generally provided in the liquid crystal display device. The pixel array is provided with a plurality of pixel circuits, and each pixel circuit is turned on and off according to a scanning signal provided by the grid driving circuit and displays a data picture according to a data signal provided by the source driving circuit. In terms of the gate driving circuit, the gate driving circuit usually has a plurality of stages of shift registers, and outputs a scan signal to the pixel array by transferring the scan signal from one stage of shift register to the next stage of shift register, so as to sequentially turn on the pixel circuits, so that the pixel circuits receive data signals.

Therefore, in the manufacturing process of the driving circuit, the Gate driving circuit is directly manufactured On the Array substrate to replace a driving chip manufactured by an external connection IC, and the application of the technology called Gate On Array (GOA) can be directly manufactured around the panel, so that the manufacturing procedure is reduced, the product cost is reduced, and the panel is thinner.

Under traditional GOA circuit module, this application proposes newly-increased a TFT device can effectively compensate the electric potential of pull-down maintenance unit well node for pull-down maintenance module is more effectual to be carried out the pull-down maintenance effect, especially under the high temperature condition, can effectually avoid because of the output anomaly that node voltage is not enough leads to.

Disclosure of Invention

In order to solve the above technical problem, an object of the present application is to provide a control circuit, including a plurality of shift registers, each shift register including: a first switch, a control terminal of the first switch being configured to receive a first control signal, a first terminal of the first switch being configured to receive the first control signal, and a second terminal of the first switch being electrically coupled to a first node; a second switch, a control terminal of the second switch being electrically coupled to the first node, a first terminal of the second switch being configured to receive a first clock signal, and a second terminal of the second switch being configured to receive a second control signal; and a third switch, a control end of the third switch is electrically coupled to a second node, a first end of the third switch is used for receiving the second control signal, and a second end of the third switch is electrically connected to a first low preset potential.

The purpose of the application and the technical problem to be solved are realized by adopting the following technical scheme.

In an embodiment of the present application, the electronic device further includes a fourth switch, a control terminal of the fourth switch is configured to receive a third control signal, a first terminal of the fourth switch is electrically coupled to the first node, and a second terminal of the fourth switch is electrically connected to a second low default potential.

In an embodiment of the present application, the electronic device further includes a fifth switch, a control terminal of the fifth switch is electrically coupled to the second node, a first terminal of the fifth switch is electrically coupled to the first node, and a second terminal of the fifth switch is electrically connected to the second low default potential.

In an embodiment of the present application, the electronic device further includes a sixth switch, a control terminal of the sixth switch is configured to receive the first clock signal, a first terminal of the sixth switch is configured to receive the first clock signal, and a second terminal of the sixth switch is electrically coupled to a third node.

In an embodiment of the present application, the electronic device further includes a seventh switch, a control terminal of the seventh switch is configured to receive an input signal, a first terminal of the seventh switch is electrically coupled to the third node, and a second terminal of the seventh switch is electrically connected to the second low default potential.

In an embodiment of the present application, the apparatus further includes an eighth switch, a control terminal of the eighth switch is electrically coupled to the third node, a first terminal of the eighth switch is configured to receive the first clock signal, and a second terminal of the eighth switch is electrically coupled to the second node.

In an embodiment of the present application, the electronic device further includes a ninth switch, a control terminal of the ninth switch is configured to receive the input signal, a first terminal of the ninth switch is electrically coupled to the second node, and a second terminal of the ninth switch is electrically connected to the second low default potential.

In an embodiment of the present application, the apparatus further includes a tenth switch, a control terminal of the tenth switch is configured to receive a second clock signal, a first terminal of the tenth switch is configured to receive the second clock signal, and a second terminal of the tenth switch is electrically coupled to the third node.

In an embodiment of the present application, the apparatus further includes a storage capacitor, one end of the storage capacitor is electrically coupled to the first node, and the other end of the storage capacitor is electrically configured to receive the second control signal.

The purpose of the application and the technical problem to be solved can be further realized by adopting the following technical measures.

Another object of the present application is to provide a display panel, including: a first substrate; and a second substrate disposed opposite to the first substrate; also included is a control circuit comprising a plurality of shift registers, each shift register comprising: a first switch, a control terminal of the first switch being configured to receive a first control signal, a first terminal of the first switch being configured to receive the first control signal, and a second terminal of the first switch being electrically coupled to a first node; a second switch, a control terminal of the second switch being electrically coupled to the first node, a first terminal of the second switch being configured to receive a first clock signal, and a second terminal of the second switch being configured to receive a second control signal; a third switch, a control end of the third switch being electrically coupled to a second node, a first end of the third switch being configured to receive the second control signal, and a second end of the third switch being electrically connected to a first low default voltage; a fourth switch, a control terminal of the fourth switch being configured to receive a third control signal, a first terminal of the fourth switch being electrically coupled to the first node, and a second terminal of the fourth switch being electrically connected to a second low default potential; a fifth switch, a control terminal of the fifth switch being electrically coupled to the second node, a first terminal of the fifth switch being electrically coupled to the first node, and a second terminal of the fifth switch being electrically connected to the second low preset potential; a sixth switch, a control terminal of the sixth switch being configured to receive the first clock signal, a first terminal of the sixth switch being configured to receive the first clock signal, and a second terminal of the sixth switch being electrically coupled to a third node; a seventh switch, a control terminal of which is configured to receive an input signal, a first terminal of which is electrically coupled to the third node, and a second terminal of which is electrically connected to the second low preset potential; a control terminal of the eighth switch is electrically coupled to the third node, a first terminal of the eighth switch is configured to receive the first clock signal, and a second terminal of the eighth switch is electrically coupled to the second node; a ninth switch, a control terminal of which is configured to receive the input signal, a first terminal of which is electrically coupled to the second node, and a second terminal of which is electrically connected to the second low default potential; and a tenth switch, a control terminal of the tenth switch being configured to receive a second clock signal, a first terminal of the tenth switch being configured to receive the second clock signal, and a second terminal of the tenth switch being electrically coupled to the third node.

The application provides that the potential of a node in the pull-down maintaining unit can be effectively compensated by adding a TFT device, so that the pull-down maintaining module can more effectively perform pull-down maintaining action, and particularly under the high-temperature condition, the output abnormity caused by insufficient node voltage can be effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic diagram of a control circuit according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a waveform output of a control circuit according to an embodiment of the present application;

FIG. 3 is a waveform output diagram of a prior art control circuit at 160 degrees Celsius;

fig. 4 is a schematic diagram illustrating waveform output of a control circuit at a temperature of 160 degrees according to an embodiment of the present disclosure.

Detailed Description

Refer to the drawings wherein like reference numbers refer to like elements throughout. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.

The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments that can be used to practice the present application. In the present application, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", and the like are merely referring to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting.

In the drawings, the thickness of layers, films, panels, regions, etc. are exaggerated for clarity. In the drawings, the thickness of some layers and regions are exaggerated for understanding and convenience of description. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.

The drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the drawings, elements having similar structures are denoted by the same reference numerals. In addition, the size and thickness of each component shown in the drawings are arbitrarily illustrated for understanding and ease of description, but the present application is not limited thereto.

In addition, in the description, unless explicitly described to the contrary, the word "comprise" will be understood to mean that the recited components are included, but not to exclude any other components. Further, in the specification, "on.

To further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the following detailed description is provided with reference to the accompanying drawings and specific embodiments for a control circuit and a display panel using the same according to the present application, and the detailed implementation, structure, features and effects thereof are described below.

Fig. 1 is a schematic diagram of a control circuit according to an embodiment of the present application, and referring to fig. 1, in an embodiment of the present application, a control circuit 100 includes a plurality of shift registers, each shift register including: a first switch T1, a control terminal T1a of the first switch T1 being configured to receive a first control signal Gn-2, a first terminal T1b of the first switch T1 being configured to receive the first control signal Gn-2, a second terminal T1c of the first switch T1 being electrically coupled to a first node P1 (n); a second switch T2, a control terminal T2a of the second switch T2 being electrically coupled to the first node P1(n), a first terminal T2b of the second switch T2 being configured to receive a first clock signal CKn, a second terminal T2c of the second switch T2 being configured to receive a second control signal Gn; and a third switch T3, a control terminal T3a of the third switch T3 is electrically coupled to a second node P2(n), a first terminal T3b of the third switch T3 is configured to receive the second control signal Gn, and a second terminal T3c of the third switch T3 is electrically connected to a first low default potential VSS.

In an embodiment of the present application, the apparatus further includes a fourth switch T4, a control terminal T4a of the fourth switch T4 is configured to receive a third control signal Gn +2, a first terminal T4b of the fourth switch T4 is electrically coupled to the first node P1(n), and a second terminal T4c of the fourth switch T4 is electrically connected to a second low predetermined voltage VGL.

In an embodiment of the present application, the apparatus further includes a fifth switch T5, a control terminal T5a of the fifth switch T5 is electrically coupled to the second node P2(n), a first terminal T5b of the fifth switch T5 is electrically coupled to the first node P1(n), and a second terminal T5c of the fifth switch T5 is electrically connected to the second low predetermined voltage VGL.

In an embodiment of the present invention, the electronic device further includes a sixth switch T6, a control terminal T6a of the sixth switch T6 is configured to receive the first clock signal CKn, a first terminal T6b of the sixth switch T6 is configured to receive the first clock signal CKn, and a second terminal T6c of the sixth switch T6 is electrically coupled to a third node P3 (n).

In an embodiment of the present invention, the apparatus further includes a seventh switch T7, a control terminal T7a of the seventh switch T7 is configured to receive an input signal Qn, a first terminal T7b of the seventh switch T7 is electrically coupled to the third node P3(n), and a second terminal T7c of the seventh switch T7 is electrically connected to the second low predetermined voltage VGL.

In an embodiment of the present application, the electronic device further includes an eighth switch T8, a control terminal T8a of the eighth switch T8 is electrically coupled to the third node P3(n), a first terminal T8b of the eighth switch T8 is configured to receive the first clock signal CKn, and a second terminal T8c of the eighth switch T8 is electrically coupled to the second node P2 (n).

In an embodiment of the present application, the apparatus further includes a ninth switch T9, a control terminal T9a of the ninth switch T9 is configured to receive the input signal Qn, a first terminal T9b of the ninth switch T9 is electrically coupled to the second node P2(n), and a second terminal T9c of the ninth switch T9 is electrically connected to the second low predetermined voltage VGL.

In an embodiment of the present application, the apparatus further includes a tenth switch T10, a control terminal T10a of the tenth switch T10 is configured to receive a second clock signal XCKn, a first terminal T10b of the tenth switch T10 is configured to receive the second clock signal XCKn, and a second terminal T10c of the tenth switch T10 is electrically coupled to the third node P3 (n).

In an embodiment of the present invention, the present invention further includes a storage capacitor 110, wherein one end of the storage capacitor 110 is electrically coupled to the first node P1(n), and the other end is electrically configured to receive the second control signal Gn.

Referring to fig. 1, in an embodiment of the present application, a display panel 10 includes: a first substrate (not shown); and a second substrate (not shown) disposed opposite to the first substrate (not shown): also included is a control circuit 100 comprising a plurality of stages of shift registers, each shift register comprising: a first switch T1, a control terminal T1a of the first switch T1 being configured to receive a first control signal Gn-2, a first terminal T1b of the first switch T1 being configured to receive the first control signal Gn-2, a second terminal T1c of the first switch T1 being electrically coupled to a first node P1 (n); a second switch T2, a control terminal T2a of the second switch T2 being electrically coupled to the first node P1(n), a first terminal T2b of the second switch T2 being configured to receive a first clock signal CKn, a second terminal T2c of the second switch T2 being configured to receive a second control signal Gn; a third switch T3, a control terminal T3a of the third switch T3 being electrically coupled to a second node P2(n), a first terminal T3b of the third switch T3 being configured to receive the second control signal Gn, a second terminal T3c of the third switch T3 being electrically connected to a first low default potential VSS; a fourth switch T4, a control terminal T4a of the fourth switch T4 being configured to receive a third control signal Gn +2, a first terminal T4b of the fourth switch T4 being electrically coupled to the first node P1(n), a second terminal T4c of the fourth switch T4 being electrically connected to a second low predetermined voltage VGL; a fifth switch T5, a control terminal T5a of the fifth switch T5 being electrically coupled to the second node P2(n), a first terminal T5b of the fifth switch T5 being electrically coupled to the first node P1(n), a second terminal T5c of the fifth switch T5 being electrically connected to the second low predetermined voltage VGL; a sixth switch T6, a control terminal T6a of the sixth switch T6 being configured to receive the first clock signal CKn, a first terminal T6b of the sixth switch T6 being configured to receive the first clock signal CKn, a second terminal T6c of the sixth switch T6 being electrically coupled to a third node P3 (n); a seventh switch T7, a control terminal T7a of the seventh switch T7 being configured to receive an input signal Qn, a first terminal T7b of the seventh switch T7 being electrically coupled to the third node P3(n), a second terminal T7c of the seventh switch T7 being electrically connected to the second low predetermined voltage VGL; an eighth switch T8, a control terminal T8a of the eighth switch T8 being electrically coupled to the third node P3(n), a first terminal T8b of the eighth switch T8 being configured to receive the first clock signal CKn, a second terminal T8c of the eighth switch T8 being electrically coupled to the second node P2 (n); a ninth switch T9, a control terminal T9a of the ninth switch T9 being configured to receive the input signal Qn, a first terminal T9b of the ninth switch T9 being electrically coupled to the second node P2(n), a second terminal T9c of the ninth switch T9 being electrically connected to the second low predetermined voltage VGL; a tenth switch T10, a control terminal T10a of the tenth switch T10 being configured to receive a second clock signal XCKn, a first terminal T10b of the tenth switch T10 being configured to receive the second clock signal XCKn, a second terminal T10c of the tenth switch T10 being electrically coupled to the third node P3 (n); and a storage capacitor 110, wherein one end of the storage capacitor 110 is electrically coupled to the first node P1(n), and the other end is electrically configured to receive the second control signal Gn.

Referring to fig. 1, in an embodiment of the present application, in a conventional GOA circuit, a TFT controlled by XCKn, named T10, is added to a pull-down unit module (T3, T4, T5, T6, T7, T8, T9). When CKn is low, T6 is closed, the P3(n) and P2(n) nodes are floating, when XCKn is high, P3(n) is high, T7 is opened, the P2(n) node is pulled down to the low potential (-15V) of CKn, and at the same time, two TFTs of T3 and T5 are completely closed.

Fig. 2 is a schematic diagram illustrating a waveform output of the control circuit 100 according to an embodiment of the present application, please refer to fig. 1 and 2, in which waveforms of nodes P3(n) and P2(n) in the novel GOA circuit module according to an embodiment of the present application; when CKn is high, the highest P3(n) node is about 39V, and the highest P2(n) node is about 28V, so that three TFTs T8, T3 and T5 can be turned on more effectively, and Qn and Gn can be maintained at VGL and VSS more effectively compared with the conventional circuit.

FIG. 3 is a waveform output diagram of a control circuit at a temperature of 160 degrees according to the prior art. Referring to fig. 3, in the conventional circuit, at a high temperature (160 ℃), the node voltages of P3(n) and P2(n) are both lower than 0V, so that Qn and Gn cannot be effectively pulled down to VGL and VSS potentials, which causes a Gate waveform output by the GOA to generate a muiti-pulse (muti-pulse) condition, and thus, an image is abnormal.

Fig. 4 is a schematic diagram illustrating waveform output of a control circuit at a temperature of 160 degrees according to an embodiment of the present disclosure. Referring to fig. 1 and 4, the high voltage of the P3(n) and P2(n) nodes of the novel GOA circuit is about 28V at high temperature (160 ℃), and the pull-down sustain function can still be effectively performed.

The application provides that the potential of a node in the pull-down maintaining unit can be effectively compensated by adding a TFT device, so that the pull-down maintaining module can more effectively perform pull-down maintaining action, and particularly under the high-temperature condition, the output abnormity caused by insufficient node voltage can be effectively avoided.

As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.