Touch display and manufacturing method thereof

• US 9,829,751 B2
• Filed: 05/21/2015
• Issued: 11/28/2017
• Est. Priority Date: 03/04/2009
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Zhou, Weifeng, Guo, Jian, Ming, Xing
• Primary Examiner(s): Toledo, Fernando L
• Assistant Examiner(s): Newton, Valerie N
• Application Number:
  US14/718,489
• Publication Number:
  US 20150253609A1
• Time in Patent Office: 922 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods

Abstract

A touch display comprises a color filter substrate, an array substrate opposite to the color filter via a plurality of spacers and a voltage detection circuit. The color filter substrate comprises an upper substrate and a common electrode formed on the upper substrate, and the array substrate comprises a lower substrate and a gate line, a data line and a pixel electrode formed on the lower substrate. The plurality of spacers comprise a first spacer formed between the gate line and the common electrode and a second spacer formed between the data line and the common electrode , which are capable of electrically connecting the common electrode with the gate line and the data line respectively under an external pressure more than a threshold value. The voltage detection circuit is connected with the gate line and the data line so as to detect whether the voltage on the gate line and the voltage on the data line become equal to the voltage of the common electrode.

Claims

1. A method of manufacturing a touch display, comprising:

providing a color filter substrate, the color filter substrate comprising an upper substrate and a common electrode formed on the upper substrate;

providing an array substrate, the array substrate comprising a lower substrate, and a gate line, a data line and a pixel electrode formed on the lower substrate, wherein a plurality of spacers are formed on the array substrate and comprise a first spacer connected with the gate line and a second spacer connected with the data line; and

assembling the color substrate and the array substrate to form the touch display,

wherein the first and second spacers abut against the common electrode on the color filter substrate and are capable of electrically connecting the common electrode with the gate line and the data line respectively under an external pressure more than a threshold value.

2. A method of manufacturing a touch display, comprising:

providing a color filter substrate, the color filter substrate comprising an upper substrate, a common electrode formed on the upper substrate, and a plurality of spacers formed on the common electrode and connected with the common electrode;

providing an array substrate, the array substrate comprising a lower substrate, and a gate line, a data line and a pixel electrode formed on the lower substrate; and

assembling the color substrate and the array substrate to form the touch display,

wherein the plurality of spacers comprise a first spacer abutting against the gate line on the array substrate and a second spacer abutting against the data line on the array substrate, which are capable of electrically connecting the common electrode with the gate line and the data line respectively under an external pressure more than a threshold value.

3. The method of manufacturing the touch display according to claim 2, wherein providing the color filter substrate comprises the following steps:

forming a color filter unit on the upper substrate;

forming the common electrode on the upper substrate with the color filter unit;

forming a black matrix with a plurality of black matrix via holes on the upper substrate with the common electrode; and

forming the plurality of spacers on the upper substrate with the black matrix, wherein the spacers are connected with the common electrode through the black matrix via holes.

4. The method of manufacturing the touch display according to claim 2, wherein the step of providing the color filter substrate comprises the following steps:

forming a black matrix on the upper substrate;

forming a color filter unit on the upper substrate with the black matrix;

forming the common electrode on the upper substrate with the color filter unit; and

forming the plurality of spacers on the upper substrate with the common electrode.

5. The method of manufacturing the touch display according to claim 2, wherein providing the array substrate comprises the following steps:

forming the gate line, the data line and a thin film transistor on the lower substrate;

depositing a passivation layer on the lower substrate, and forming a plurality of passivation layer via holes in the passivation layer at positions corresponding to the spacers by patterning, so that the spacers abut against the gate line and the data line through the passivation layer via holes; and

depositing a transparent conductive film on the lower substrate, and forming the pixel electrode and a conductive protection layer by patterning, the conductive protection layer being remained at the passivation layer via holes.

6. The method of manufacturing the touch display according to claim 2, further comprising:

providing a voltage detection circuit, wherein the voltage detection circuit is connected with the gate line and the data line so as to detect whether the voltage on the gate line and the voltage on the data line become equal to the voltage of the common electrode.

7. The method of manufacturing the touch display according to claim 6, wherein the voltage detection circuit is provided on the array substrate.