阅读说明：本技术 扫描电路、驱动电路、触控显示面板、接收切换电路及驱动方法 (Scanning circuit, driving circuit, touch display panel, receiving switching circuit and driving method ) 是由 许世峰 谢晓冬 何敏 钟腾飞 张新秀 庞斌 李媛 于 2018-11-30 设计创作，主要内容包括：一种扫描电路、驱动电路、触控显示面板、接收切换电路及驱动方法。该扫描电路(10),包括功能切换电路(100)和多个级联的移位寄存器单元(200)。多个级联的移位寄存器单元(200)的每个包括控制端(CTRL1)和移位扫描输出端(OUT1),且配置为响应于控制端(CTRL1)接收的控制信号在移位扫描输出端(OUT1)输出第一输出信号；功能切换电路(100)包括模式切换输入端(SW)、控制信号输出端(CTRL2)和模式扫描输出端(OUT2),且控制信号输出端(CTRL2)和模式扫描输出端(OUT2)分别与多个级联的移位寄存器单元(200)的控制端(CTRL1)和移位扫描输出端(OUT1)连接。功能切换电路(100)配置为响应于模式切换输入端(SW)接收的模式切换输入信号,在控制信号输出端(CTRL2)输出控制信号至多个级联的移位寄存器单元(200)的控制端(CTRL1),或者在模式扫描输出端(OUT2)输出第二输出信号至多个级联的移位寄存器单元(200)的移位扫描输出端(OUT1)。该扫描电路不需要大量增加驱动指纹识别单元的通道数量,即可实现显示屏内任意位置的指纹识别和触控功能。(A scanning circuit, a driving circuit, a touch display panel, a receiving switching circuit and a driving method are provided. The scanning circuit (10) comprises a function switching circuit (100) and a plurality of cascaded shift register units (200). Each of the plurality of cascaded shift register cells (200) includes a control terminal (CTRL1) and a shift scan output terminal (OUT1), and is configured to output a first output signal at the shift scan output terminal (OUT1) in response to a control signal received by the control terminal (CTRL 1); the function switching circuit (100) comprises a mode switching input terminal (SW), a control signal output terminal (CTRL2) and a mode scanning output terminal (OUT2), and the control signal output terminal (CTRL2) and the mode scanning output terminal (OUT2) are respectively connected with the control terminals (CTRL1) and the shift scanning output terminals (OUT1) of the plurality of cascaded shift register units (200). The function switching circuit (100) is configured to output a control signal at a control signal output (CTRL2) to a control terminal (CTRL1) of the plurality of cascaded shift register cells (200), or to output a second output signal at a mode scan output (OUT2) to a shift scan output (OUT1) of the plurality of cascaded shift register cells (200), in response to a mode switching input signal received at the mode switching input (SW). The scanning circuit can realize the fingerprint identification and touch control functions of any position in the display screen without greatly increasing the number of channels for driving the fingerprint identification unit.)

A scanning circuit comprises a function switching circuit and a plurality of cascaded shift register units; wherein the content of the first and second substances,

each of the plurality of cascaded shift register cells comprises a control terminal and a shift scan output terminal, and is configured to output a first output signal at the shift scan output terminal in response to a control signal received by the control terminal;

the function switching circuit comprises a mode switching input end, a control signal output end and a mode scanning output end, the control signal output end and the mode scanning output end are respectively connected with the control ends and the shifting scanning output ends of the plurality of cascaded shifting register units,

wherein the function switching circuit is configured to output the control signal to the control terminals of the plurality of cascaded shift register cells at the control signal output terminal or output a second output signal to the shift scan output terminals of the plurality of cascaded shift register cells at the mode scan output terminal in response to a mode switching input signal received at the mode switching input terminal.

The scanning circuit according to claim 1, wherein the function switching circuit includes an inverting circuit and an output control circuit; wherein the content of the first and second substances,

the inverting circuit is connected with the mode switching input end and the control signal output end and is configured to invert the mode switching input signal received by the mode switching input end to be output to the control signal output end as the control signal;

the output control circuit is connected to the mode switching input and the mode scan output, and is configured to output the second output signal at the mode scan output in response to the mode switching input signal received at the mode switching input.

The scan circuit according to claim 2, wherein the inverter circuit includes a first transistor and a second transistor; wherein the content of the first and second substances,

a gate of the first transistor is connected to the mode switching input terminal to receive the mode switching input signal, a first pole of the first transistor is connected to the control signal output terminal, and a second pole of the first transistor is connected to a first voltage terminal to receive a first voltage;

the grid electrode and the first pole of the second transistor are electrically connected with each other and are connected with the second voltage end to receive the second voltage, and the second pole of the second transistor is connected with the control signal output end.

The scan circuit of claim 3, wherein the output control circuit comprises a third transistor,

wherein a gate of the third transistor is coupled to the mode switching input terminal to receive the mode switching input signal, a first pole of the third transistor is coupled to the second voltage terminal to receive the second voltage, and a second pole of the third transistor is coupled to the mode scan output terminal.

The scan circuit of any of claims 1 to 4, wherein each of the plurality of cascaded shift register cells comprises an input circuit, an output circuit, a first node reset circuit, and an output reset circuit; wherein the content of the first and second substances,

the input circuit is connected with an input end, a first node and the control end and is configured to respond to the control signal received by the control end and output an input signal received by the input end to the first node;

the output circuit is connected with the first node and the shift scanning output end and is configured to output the first output signal at the shift scanning output end under the control of the level of the first node;

the first node reset circuit is connected with a reset terminal and the first node and is configured to reset the first node in response to a reset signal received by the reset terminal;

the output reset circuit is connected with the reset terminal and the shift scanning output terminal, and is configured to reset the shift scanning output terminal in response to the reset signal received by the reset terminal.

The scan circuit of claim 5,

the input circuit comprises a fourth transistor, wherein a gate of the fourth transistor and the control terminal are connected to receive the control signal, a first pole of the fourth transistor and the input terminal are connected to receive the input signal, and a second pole of the fourth transistor and the first node are connected;

the output circuit comprises a fifth transistor and a first capacitor, wherein the grid electrode of the fifth transistor is connected with the first node, the first pole of the fifth transistor is connected with the first clock signal end to receive the first clock signal as the first output signal, and the second pole of the fifth transistor is connected with the shift scanning output end; a first end of the first capacitor is connected with the first node, and a second end of the first capacitor is connected with the shift scanning output end;

the first node reset circuit comprises a sixth transistor, wherein a gate of the sixth transistor is connected to the reset terminal to receive the reset signal, a first pole of the sixth transistor is connected to the first node, and a second pole of the sixth transistor is connected to the first voltage terminal to receive a first voltage;

the output reset circuit includes a seventh transistor, wherein a gate of the seventh transistor is connected to the reset terminal to receive the reset signal, a first pole of the seventh transistor is connected to the shift scan output terminal, and a second pole of the seventh transistor is connected to the first voltage terminal to receive the first voltage.

The scan circuit of any of claims 1-6,

a mode switching input terminal of the function switching circuit receives a first function input signal as the mode switching input signal;

in the plurality of cascaded shift register units, the input end of the 1 st-stage shift register unit receives a second function input signal as an input signal;

except the 1 st stage shift register unit, the input ends of the other shift register units at each stage are connected with the shift scanning output end of the shift register unit at the upper stage;

except the shift register unit of the last 1 stage, the reset terminals of the shift register units of other stages are connected with the shift scanning output terminal of the shift register unit of the next stage.

A driver circuit comprising M cascaded scan circuits as claimed in any one of claims 1 to 7, M being an integer greater than 1.

The drive circuit according to claim 8, further comprising M first function input signal lines and M second function input signal lines; wherein the content of the first and second substances,

the x-th first function input signal line is connected with a mode switching input end in the x-th scanning circuit to provide a first function input signal as the mode switching input signal, and the x-th second function input signal line is connected with an input end of a 1-stage shift register unit in the x-th scanning circuit to provide a second function input signal;

wherein x is an integer of 1 or more and M or less.

The driving circuit according to claim 9, wherein the M first functional input signal lines are further connected in one-to-one correspondence with a plurality of output terminals of a first functional scanning circuit to receive a plurality of output signals shifted and output by the first functional scanning circuit as the first functional input signals.

The drive circuit according to any one of claims 8 to 10,

the input end of the 1 st stage shift register unit of the x-th stage scanning circuit is also connected with the shift scanning output end of the last 1 st stage shift register unit of the x-1 th stage scanning circuit;

the reset terminal of the last 1 stage shift register unit of the x-th stage scanning circuit is connected with the shift scanning output terminal of the 1 st stage shift register unit of the x + 1-th stage scanning circuit,

x is an integer of 2 or more and M or less.

The drive circuit according to any one of claims 8 to 11, further comprising a reset signal line and a plurality of unidirectional input circuits,

the reset signal line is respectively connected with the reset end of each shift register unit of each stage of scanning circuit through the plurality of unidirectional input circuits so as to provide a total reset signal;

the input ends of the plurality of unidirectional input circuits are connected with the reset signal line, and the output ends of the plurality of unidirectional input circuits are connected with the reset ends of the plurality of cascaded shift register units in a one-to-one correspondence manner.

The drive circuit of claim 12, wherein each of the plurality of unidirectional input circuits comprises a diode,

and the first pole of the diode is connected with the reset signal line, and the second pole of the diode is connected with the reset end of the shift register unit.

Touch display panel comprising a driving circuit according to any of claims 8-13 and (M P) Q fingerprint identification units arranged in an array,

the fingerprint identification unit is divided into M × N touch units which are arranged in an array, and each touch unit comprises P × Q fingerprint identification units which are arranged in an array;

each of the M scanning circuits comprises P cascaded shift register units;

the M rows of touch units are connected with the M scanning circuits in a one-to-one corresponding mode, and the P rows of fingerprint identification units included in each touch unit are connected with the P cascaded shift register units included in each scanning circuit in a one-to-one corresponding mode;

wherein N, P and Q are integers which are more than 1.

The touch display panel according to claim 14, wherein each of the fingerprint identification units comprises a driving electrode and a detection electrode, wherein M × P rows of the driving electrodes of the fingerprint identification units included in the M rows of touch units are connected to shift scan output terminals of M × P cascaded shift register units included in the M scan circuits in the driving circuit in a one-to-one correspondence manner through M × P driving lines to receive driving signals.

The touch display panel according to claim 15, further comprising a reception switching circuit, wherein N × Q columns of detection electrodes of the fingerprint identification unit included in the N columns of the touch units are connected to the reception switching circuit through N × Q detection lines to transmit detection signals;

the receiving switching circuit is configured to connect the Q detection lines of each row of touch units with the same touch detection signal line in response to a switching control signal to transmit the detection signal output by the row of touch units to the same touch detection signal line,

connecting the Q detection lines of the touch units in different rows with different touch detection signal lines to transmit detection signals output by the touch units in different rows to the different touch detection signal lines,

and connecting the Q detection lines of the selected row of touch units with different fingerprint detection signal lines so as to output detection signals output by the fingerprint identification units of the Q rows of touch units to the different fingerprint detection signal lines.

The touch display panel according to claim 16, wherein the reception switching circuit includes N × Q reception switching sub-circuits connected in one-to-one correspondence with the N × Q detection lines of the N × Q columns of fingerprint identification units, and configured to output, in response to the switching control signal, the detection signals of the Q detection lines of the touch units of each column to the same touch detection signal line, the detection signals of the Q detection lines of the touch units of the different columns to the different touch detection signal lines, and the detection signals of the Q detection lines of the fingerprint identification units of the Q columns included in the selected one column of touch units to the different fingerprint detection signal lines.

The touch display panel of claim 17, wherein each of the N x Q receive switch sub-circuits includes a first receive switch sub-circuit and a second receive switch sub-circuit, respectively; wherein the content of the first and second substances,

the N × Q first receiving switching sub-circuits are correspondingly connected with the first switch control lines and the N × Q detection lines one by one and are configured to respond to first switching control signals provided by the first switch control lines and transmit detection signals of the N × Q detection lines to corresponding fingerprint detection signal lines;

the N × Q second receiving switching sub-circuits are correspondingly connected with the second switch control lines and the N × Q detection lines one by one, and are configured to respond to second switching control signals provided by the second switch control lines and transmit detection signals of the N × Q detection lines to corresponding touch detection signal lines.

The touch display panel of claim 18, wherein the first switch control line and the second switch control line are the same switch control line,

the first receiving switching sub-circuit and the second receiving switching sub-circuit realize opposite transistor types.

A reception switching circuit configured to connect Q detection lines of each row of touch cells to the same touch detection signal line in response to a switching control signal to transmit a detection signal output from the row of touch cells to the same touch detection signal line,

connecting the Q detection lines of the touch units in different rows with different touch detection signal lines to transmit detection signals output by the touch units in different rows to the different touch detection signal lines,

and connecting the Q detection lines of the selected row of touch units with different fingerprint detection signal lines so as to output detection signals output by the fingerprint identification units of the Q rows of touch units to the different fingerprint detection signal lines.

The reception switching circuit according to claim 20, wherein the reception switching circuit includes N × Q reception switching sub-circuits connected in one-to-one correspondence with N × Q detection lines of N × Q columns of fingerprint identification units, and is configured to output, in response to the switching control signal, detection signals of the Q detection lines of each column of touch units to the same touch detection signal line, to output detection signals of the Q detection lines of the touch units of the different columns to the different touch detection signal line, and to output detection signals of the Q detection lines of the fingerprint identification units of Q columns included in the selected one column of touch units to the different fingerprint detection signal line.

The receive switching circuit of claim 21, wherein each of the N x Q receive switching sub-circuits comprises a first receive switching sub-circuit and a second receive switching sub-circuit, respectively; wherein the content of the first and second substances,

the N × Q first receiving switching sub-circuits are correspondingly connected with the first switch control lines and the N × Q detection lines one by one and are configured to respond to first switching control signals provided by the first switch control lines and transmit detection signals of the N × Q detection lines to corresponding fingerprint detection signal lines;

the N × Q second receiving switching sub-circuits are correspondingly connected with the second switch control lines and the N × Q detection lines one by one, and are configured to respond to second switching control signals provided by the second switch control lines and transmit detection signals of the N × Q detection lines to corresponding touch detection signal lines.

The receive switching circuitry of claim 22, wherein the first and second switch control lines are the same switch control line, the first and second receive switching sub-circuits implementing opposite transistor types.

A driving method of the scanning circuit according to any one of claims 1 to 7, comprising:

the function switching circuit outputs the control signal to the control terminals of the plurality of cascaded shift register cells at the control signal output terminal in response to the mode switching input signal received at the mode switching input terminal,

the plurality of cascaded shift register units output the first output signal at the shift scan output terminal in response to the control signal received at the control terminal;

the function switching circuit outputs the second output signal at the mode scan output to the shift scan outputs of the plurality of cascaded shift register cells in response to the mode switching input signal received at the mode switching input.

A driving method of the touch display panel according to any one of claims 14 to 19, comprising:

in a touch control stage, responding to the mode switching input signal, each stage of scanning circuits of the driving circuit outputs the second output signal to the M x N touch control units step by step as a driving signal, and determines a first function input signal line corresponding to a touch control position according to detection signals of the M x N touch control units;

in a fingerprint identification stage, a corresponding second function input signal line is determined according to the first function input signal line, a second function input signal provided by the second function input signal line is input to a corresponding scanning circuit in the driving circuit in response to the control signal, and each level of shift register units in the corresponding scanning circuit are driven to output the first output signal step by step as the driving signal to each fingerprint identification unit in the M x N touch control units.

The driving method according to claim 25, the touch display panel further comprising a reception switching circuit, the driving method further comprising:

in the touch control stage, in response to a switching control signal, the reception switching circuit connects the Q detection lines of each row of touch control units with the same touch control detection signal line to transmit the detection signal output by the same row of touch control units to the same touch control detection signal line, connects the Q detection lines of different rows of touch control units with different touch control detection signal lines to transmit the detection signal output by the different rows of touch control units to the different touch control detection signal lines, and

in the fingerprint identification stage, Q detection lines of a row of selected touch units are connected with different fingerprint detection signal lines so as to output detection signals output by the row of touch units to the different fingerprint detection signal lines.

A driving method of the reception switching circuit according to any one of claims 20 to 23, comprising:

connecting Q detection lines of each row of touch units with the same touch detection signal line in response to the switching control signal to transmit detection signals output from the same row of touch units to the same touch detection signal line, connecting Q detection lines of different rows of touch units with different touch detection signal lines to transmit detection signals output from the different rows of touch units to the different touch detection signal lines,

and connecting the Q detection lines of the selected row of touch units with different fingerprint detection signal lines so as to output the detection signals output by the row of touch units to the different fingerprint detection signal lines.