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Gate drive circuit and display panel and display device comprising same

A gate drive circuit and display panel technology, applied in static indicators, electrical digital data processing, instruments, etc., can solve the problems of increased parasitic capacitance, increased load capacitance, and affecting the overall performance of touch electrodes, achieving good performance Effect

Active Publication Date: 2014-10-01
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the parasitic capacitance between the touch electrode (that is, the common electrode) and other electrodes (such as the gate) increases, and the load capacitance equivalent to self-capacitance increases, which affects the overall performance of the touch electrode.

Method used

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  • Gate drive circuit and display panel and display device comprising same
  • Gate drive circuit and display panel and display device comprising same
  • Gate drive circuit and display panel and display device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a gate drive circuit for a display panel with a self-capacitive touch function, such as image 3As shown, the driving circuit includes: a driving unit 11, configured to receive a plurality of input signals Sin, generate and output a first gate signal S1; a modulation unit 12, including a control terminal 120, a first input terminal 121, a second input terminal 122 and output terminal 123; wherein, the first input terminal 121 receives the first grid signal S1, the second input terminal 122 receives the modulation signal Sa, the control terminal 120 receives the control signal Sc, and the output terminal 123 outputs the second grid signal S2 . The modulation unit 12 selects whether to modulate the first gate signal S1 through the modulation signal Sc according to the received control signal Sc, and outputs the second gate signal S2, so as to reduce the load of the self-capacitance.

[0038] Wherein, the first gate signal S1 is an original gate d...

Embodiment 2

[0043] This embodiment is a refinement of Embodiment 1.

[0044] Specifically, such as Figure 5 As shown, the modulation unit 12 may include a thin film transistor 124, the control terminal 120 of the modulation unit 12 is the gate of the thin film transistor 124, the first input terminal 121 of the modulation unit 12 is coupled to the output terminal 123 of the modulation unit 12, and the modulation unit 12 The second input terminal 122 of the TFT 124 is the first pole of the thin film transistor 124 , and the second pole of the thin film transistor 124 is coupled to the output terminal 123 of the modulation unit 12 . Wherein, coupling may mean direct electrical connection or indirect electrical connection.

[0045] Here, the first pole and the second pole of the thin film transistor 124 are its source and drain respectively, and which one is the source and which is the drain depends on whether the type of the thin film transistor 124 is P-type or N-type, which is not limit...

Embodiment 3

[0049] This embodiment is also a detailed refinement of the first embodiment.

[0050] Such as Figure 6a As shown, the modulation unit 12 may further specifically include a gating circuit 125 and an adding circuit 126, the gating circuit 125 receives the control signal Sc through the control terminal 120 of the modulation unit 12, and receives the modulation signal through the second input terminal 122 of the modulation unit 12 Sa, and output the modulated signal Sa to the addition circuit 126 when the control signal Sc is valid. The addition circuit 126 receives the first gate signal S1 through the first input terminal 121 of the modulation unit 12, and superimposes the modulation signal Sa output by the gating circuit 12 with the first gate signal S1, and passes the output terminal of the modulation unit 12 123 outputs the second gate signal S2.

[0051] This embodiment presents a specific optional structure of the modulating unit 12, so that when the display panel needs ...

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PUM

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Abstract

The invention provides a gate drive circuit of a display panel with a self-capacitance touch function. The drive circuit comprises a driving unit and a modulation unit. The driving unit is used for receiving multiple input signals, generating a first gate signal and outputting the first gate signal. The modulation unit comprises a control end, a first input end, a second input end and an output end, wherein the first input end is used for receiving the first gate signal; the second input end is used for receiving a modulating signal; the control end is used for receiving a control signal; the output end is used for outputting a second gate signal. The modulation unit determines whether to modulate the first gate signal through the modulating signal according to the received control signal and outputs the second gate signal to reduce a self-capacitance load. The invention further provides the display panel and a display device comprising the gate drive circuit. By the adoption of the gate drive circuit, influences of stray capacitance of the display panel or the display device on the display panel or the display device are reduced, and the performance of the display panel and the display device is improved.

Description

technical field [0001] The present invention relates to the field of touch control, in particular to a gate drive circuit of a display panel with a self-capacitance touch function, a display panel, and a display device. Background technique [0002] Currently, in the field of display panels, display panels with touch functions have become more and more mainstream display products, and various integration methods of display panels and touch panels have emerged, which can be described as various, such as incell, Out-of-the-box (oncell) and plug-in. On the other hand, if it is classified from the working principle, the display panel with touch function can be roughly divided into capacitive, resistive, infrared, etc., and the capacitive touch display panel mainly includes self-capacitance and mutual capacitance. Two types of formulas. Each type of touch display panel has its own advantages and disadvantages. For example, in the in-cell display panel based on self-capacitance...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G3/36G06F3/044
Inventor 符鞠建李嘉灵马从华
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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