Double-sided touch display device

Patent metadata

Field	Value
Publication number	US-2016018923-A1
Application number	US-201414422746-A
Country	US
Kind code	A1
Filing date	Apr 30, 2014
Priority date	Dec 27, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

The present invention relates to the field of display technology, and particularly to a double-sided touch display device which comprises a touch feedback electrode, a first touch receiving electrode and a second touch receiving electrode, wherein the first touch receiving electrode and the second touch receiving electrode are provided at both sides of the touch feedback electrode, respectively. The double-sided touch display device achieve functions of both double-sided touch and transparent display, and has a simple structure and low production cost.

First claim

1 . A double-sided touch display device, comprising a touch feedback electrode, a first touch receiving electrode and a second touch receiving electrode, wherein the first touch receiving electrode and the second touch receiving electrode are provided at both sides of the touch feedback electrode, respectively.

2 . The double-sided touch display device according to claim 1 , comprising a color filter substrate and an array substrate which are arranged oppositely, the first touch receiving electrode is arranged on the color filter substrate, the second touch receiving electrode is arranged on the array substrate, and both the first touch receiving electrode and the second touch receiving electrode are arranged crosswise relative to the touch feedback electrode to generate mutual capacitances.

3 . The double-sided touch display device according to claim 2 , wherein the touch feedback electrode is arranged at a side of the array substrate close to the color filter substrate; the first touch receiving electrode is arranged at a side of the color filter substrate away from the array substrate or at a side of the color filter substrate close to the array substrate, the second touch receiving electrode is arrange at a side of the array substrate away from the color filter substrate or at the side of the array substrate close to the color filter substrate, and the second touch receiving electrode is insulated from the touch feedback electrode at cross areas.

4 . The double-sided touch display device according to claim 2 , wherein the array substrate comprises a second substrate and a thin film transistor, a pixel electrode and a common electrode which are arranged on the second substrate, the thin film transistor comprises a gate, a source and a drain, the pixel electrode and the drain are electrically connected, and the touch feedback electrode and the common electrode are formed from the same layer of film in one patterning process.

5 . The double-sided touch display device according to claim 4 , wherein a liquid crystal layer is provided between the color filter substrate and the array substrate, a side light source, which comprises a light source and a light guide plate arranged at a side of the light source close to the array substrate, is provided at a side of the array substrate, and light emitted from the light source enters into the array substrate after guided by the light guide plate.

6 . The double-sided touch display device according to claim 5 , wherein the second substrate is made of polymethyl methacrylate, and is doped with photoinduced reflection particles therein to allow the light emitted from the side light source toward the second substrate to be reflected and refracted.

7 . The double-sided touch display device according to claim 6 , wherein the photoinduced reflection particles are nanoscale metal oxide, nanoscale non-metal oxide, nanoscale metal salt or nanoscale rare-earth metal.

8 . The double-sided touch display device according to claim 1 , comprising an array substrate, in which a light-emitting device is provided, the first touch receiving electrode and the second touch receiving electrode are arranged on the array substrate, and both the first touch receiving electrode and the second touch receiving electrode are arranged crosswise with respect to the touch feedback electrode to generate mutual capacitances.

9 . The double-sided touch display device according to claim 8 , wherein the touch feedback electrode is arranged above or below the light-emitting device; the first touch receiving electrode and the second touch receiving electrode are respectively provided at upper and lower sides of the array substrate, and the first touch receiving electrode and the second touch receiving electrode are respectively insulated from the touch feedback electrode at cross areas.

10 . The double-sided touch display device according to claim 8 , wherein the light-emitting device is a WOLED device or an OLED device.

11 . The double-sided touch display device according to claim 10 , wherein the light-emitting device is the WOLED device, and a color filter layer is further provided on the array substrate and arranged at a light-emitting side of the WOLED device.

12 . The double-sided touch display device according to claim 10 , wherein the WOLED device/OLED device comprises a pixel electrode which is an anode or a cathode of the WOLED device/OLED device, and the touch feedback electrode and the pixel electrode are formed from the same layer of film in one patterning process.

13 - 16 . (canceled)

17 . The double-sided touch display device according to claim 2 , wherein the first touch receiving electrode comprises a plurality of first touch receiving electrode rows arranged in parallel, each of which comprises a plurality of first touch receiving sub-electrodes which are electrically connected in sequence, the second touch receiving electrode comprises a plurality of second touch receiving electrode rows arranged in parallel, each of which comprises a plurality of second touch receiving sub-electrodes which are electrically connected in sequence, the touch feedback electrode comprises a plurality of touch feedback electrode columns arranged in parallel, each of which comprises a plurality of touch feedback sub-electrodes which are electrically connected in sequence, and arrangement directions of the first touch receiving electrode rows and the second touch receiving electrode rows are the same, and are perpendicular to that of the touch feedback electrode columns, respectively.

18 . The double-sided touch display device according to claim 17 , wherein the touch feedback sub-electrodes included in each touch feedback electrode column have the same number as and are in one-to-one correspondence in position with the first touch receiving electrode rows and/or the second touch receiving electrode rows; the first touch receiving sub-electrodes included in each first touch receiving electrode row and/or the second touch receiving sub-electrodes included in each second touch receiving electrode row have the same number as and are in one-to-one correspondence in position with the touch feedback electrode columns.

19 . The double-sided touch display device according to claim 17 , wherein the first touch receiving sub-electrode, the second touch receiving sub-electrode and the touch feedback sub-electrode each have a shape of rhombus.

20 . The double-sided touch display device according to claim 17 , further comprising a touch controller and a central controller, the first touch receiving electrode, the second touch receiving electrode and the touch feedback electrode are all electrically connected to the touch controller, and the touch controller is configured to receive instructions from the central controller and transfer the instructions to the touch feedback electrode, so as to instruct the touch feedback electrode to perform scanning column by column, meanwhile, to input an initial signal to one end of each of the first touch receiving electrode rows and/or one end of each of the second touch receiving electrode rows, to read a terminal signal from the other end of each of the first touch receiving electrode rows and/or the other end of each of the second touch receiving electrode rows, and to determine coordinates of a touch point based on a difference in the terminal signals read from the respective first touch receiving electrode rows and/or the respective second touch receiving electrode rows, and to transmit the coordinates to the central controller.

21 . The do

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhang Wenlin
• Cao Zhanfeng
• Hui Guanbao

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G09G3/36

  using liquid crystals · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04104

  Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger · CPC title