Touch display device

A technology of a touch display device and a touch layer, which is applied in the fields of instruments, electrical digital data processing, and data processing input/output processes, etc., can solve problems such as poor touch operation experience, and achieve the effect of improving the touch point reporting rate.

Active Publication Date: 2020-08-28
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For capacitive touch screens, the higher the touch report rate, the smoother the user's touch operation, on the contrary, the lower the touch report rate, the worse the touch operation experience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0084] see figure 1 , which is a schematic diagram of the touch display device of the present application. The touch display device includes an OLED display panel 10 , a touch layer 20 , a polarizer 30 and a protective cover 40 .

[0085] The OLED display panel 10 includes a substrate 100 , a TFT array layer 101 , an OLED array layer 102 and an encapsulation layer 103 .

[0086] The substrate 100 is a flexible substrate. The thin film transistor array layer 101 is disposed on the substrate 100, and the thin film transistor array layer 101 includes a plurality of thin film transistors arranged in an array. The OLED array layer 102 is disposed on a side of the TFT array layer 101 away from the substrate 100 . The organic light emitting diode array layer 102 includes a plurality of organic light emitting diodes arranged in an array, and the plurality of organic light emitting diodes includes a plurality of independent anodes, an organic light emitting layer disposed on each an...

no. 2 example

[0090] see image 3 , which is figure 1 A schematic diagram of the first structure of the touch layer of the touch display device shown. The first electrodes 204 of the plurality of touch units 207 arranged in the same row in the first direction are electrically connected to form a first electrode channel, and the second electrodes of the plurality of touch units 207 arranged in the same row in the second direction 205 are electrically connected to form a second electrode channel. Both ends of each first electrode channel are connected to the first lead 208 , and one end of each second electrode channel is connected to the second lead 209 , that is, the touch layer adopts a 2T1R structure.

[0091] In this embodiment, the first electrodes are driving electrodes, and the second electrodes are sensing electrodes. There are 17 first electrode channels in the second direction, and 37 second electrode channels in the first direction, wherein the 1st second electrode channel to t...

no. 3 example

[0095] see Figure 4 , which is figure 1 A schematic diagram of the second structure of the touch layer of the touch display device shown. Figure 4 Touch layer shown with image 3 The touch layers shown are basically similar, Figure 4 and image 3 The structure of the touch layer shown is different in that one end of each first electrode channel is connected to the first lead 208 , and one end of each second electrode channel is connected to the second lead 209 , that is, the touch layer adopts a 1T1R structure. The layout design of the first electrode and the second electrode in this embodiment is consistent with image 3 The shown touch layer is the same, and the way of group scanning is also the same as that of the second embodiment.

[0096] In this embodiment, the node mutual capacitance M that takes the longest time to charge to 95% of the input voltage on the touch layer is located at a position far from the input signal of the touch chip, for example, at the fir...

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Abstract

The invention provides a touch display device. The touch display device comprises a touch layer, the touch layer comprises a plurality of touch units; wherein each touch unit comprises a first electrode and a second electrode, the first electrode is electrically insulated from the second electrode, in each touch unit, the resistance of the first electrode is greater than 0 ohm and less than or equal to 50 ohm, and the parasitic capacitance of the first electrode is greater than 0 picofarad and less than or equal to 18 picofarad; the resistance of the second electrode is greater than 0 ohm andless than or equal to 50 ohm, and the parasitic capacitance of the second electrode is greater than 0 picofarad and less than or equal to 18 picofarad. The resistance and the parasitic capacitance ofthe first electrode in each touch unit and the resistance and the parasitic capacitance of the second electrode in each touch unit are optimized at the same time; therefore, the time required for charging the node mutual capacitance between the first electrode and the second electrode in each touch unit to the preset voltage is shortened, and the touch reporting rate of the touch display device isincreased.

Description

technical field [0001] The present application relates to the field of touch technology, in particular to a touch display device. Background technique [0002] Capacitive touch screens are widely used in various electronic interactive scene devices due to their high durability and long life, and support for multi-touch functions. For a capacitive touch screen, the higher the touch report rate, the smoother the user's touch operation, and on the contrary, the lower the touch report rate, the worse the touch operation experience. [0003] Therefore, it is necessary to provide a technical solution to improve the reporting rate of the touch display device. Contents of the invention [0004] The purpose of the present application is to provide a touch display device with a high touch reporting rate. [0005] In order to achieve the above object, the present application provides a touch display device including a touch layer, the touch layer includes a plurality of touch units...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0412G06F3/0446G06F2203/04112G06F3/0448G06F2203/04111G06F3/0443
Inventor 叶剑
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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