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Touch display driving method, touch display driving device and touch display screen

A technology of touch drive and touch display, applied in the field of touch display drive device, touch display drive method, and touch display screen, capable of solving problems such as poor display

Active Publication Date: 2019-06-25
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors found that, in the process of displaying on the touch display substrate shared by the above-mentioned common electrodes and touch electrodes, display defects similar to block shapes are prone to occur.

Method used

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  • Touch display driving method, touch display driving device and touch display screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a touch display substrate, which is especially suitable for a touch display substrate controlled based on a TDDI chip. The touch display substrate includes: a base and a plurality of electrode blocks 1 arranged on the base.

[0032] Wherein, the substrate may be a rigid substrate or a flexible substrate, and the material of the substrate may include glass, polyimide, and the like. The electrode block 1 is preferably a self-capacitance electrode block, that is, it serves as both a touch electrode and a sensing electrode. In the touch stage, the touch drive voltage is input to the electrode block 1. When a finger touches the touch screen composed of a touch display substrate, a coupling capacitance is induced between the finger and the electrode block 1, and the voltage of the electrode block 1 changes, thereby passing The touch condition can be determined by detecting the voltage change of the electrode block 1 . Specifically, in this embodimen...

Embodiment 2

[0037] Such as figure 1 As shown, this embodiment provides a touch display driving method, which can be used to drive the touch display substrate provided in Embodiment 1.

[0038] Wherein, the arrangement of the electrode blocks 1 and the arrangement of the control area 2 in the touch display substrate can be in many ways. In order to illustrate the touch display driving method of this embodiment more clearly, the electrode blocks 1 in the touch display substrate are arranged in an array, the control area 2 is also arranged in an array, and the control area 2 includes multiple The electrode block 1 will be described as an example.

[0039] In the touch display driving method of this embodiment, each frame time includes a display phase and a touch phase. When the touch display substrate is in the display stage, write the common voltage to the electrode block 1 for the touch display substrate to display; The electrode block 1 inputs touch driving voltage. Wherein, when the ...

Embodiment 3

[0050] This embodiment provides a touch display driving method, which is similar to the touch display driving method provided in Embodiment 2, and can be used to drive the touch display substrate provided in Embodiment 1.

[0051] In particular, in this embodiment, each control area 2 of the touch display substrate includes edge positions close to adjacent control areas 2 . In the touch display driving method of this embodiment, the step of writing the touch driving voltage to the electrode block 1 includes:

[0052] At an edge position in the same control area 2 , a touch driving voltage lower than the common voltage is input to part of the electrode blocks 1 , and a touch driving voltage greater than the common voltage is input to part of the electrode blocks 1 .

[0053] It can be understood that, according to the coupling effect principle, the electrode block 1 closer to the adjacent control area 2 is more likely to cause the coupling effect. Therefore, in this embodiment...

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PUM

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Abstract

The invention provides a touch display driving method, a touch display driving device and a touch display screen, and belongs to the technical field of display. The touch display driving method is used for driving a touch display substrate, the touch display substrate comprises a base, and a plurality of electrode blocks are arranged on the base. The electrode blocks are multiplexed into common electrodes and touch driving electrodes in a time-sharing manner. The touch display driving method comprises the steps that when a touch display substrate is in a display stage, common voltage is written into an electrode block. When the touch display substrate is in a touch stage, writing a touch driving voltage into the electrode block. The touch display substrate is divided into a plurality of control areas, and each control area comprises a plurality of electrode blocks. The step of writing the touch driving voltage into the electrode block specifically comprises the steps that in the same control area, the touch driving voltage larger than the common voltage is input into part of the electrode blocks, and the touch driving voltage smaller than the common voltage is input into part of the electrode blocks.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a touch display driving method, a touch display driving device, and a touch display screen. Background technique [0002] TDDI (Touch and Display Driver Integration; touch and display driver integration) technology integrates touch sensing and display driving functions into a single chip, which has the advantages of reducing the cost of touch display substrates, improving touch sensitivity, reducing display noise, and thicker Lightweight and other advantages. [0003] The touch technology in TDDI technology generally adopts the self-capacitance mode, and usually the common electrodes of the touch display substrate are shared with the touch electrodes, that is, multiple electrode blocks are set, and each electrode block is connected to a signal line separately. , the common voltage Vcom is input to the electrode block, and the electrode block is used as a common elec...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
Inventor 李鹏涛马青于洁韩锐赵铁磊
Owner BOE TECH GRP CO LTD