Liquid crystal display

• US 8,558,822 B2
• Filed: 03/04/2010
• Issued: 10/15/2013
• Est. Priority Date: 03/05/2009
• Status: Active Grant

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Lin, Lin, Chen, Shyh-Jeng, Wang, Wen-Hung
• Primary Examiner(s): Lao, Lun-Yi
• Assistant Examiner(s): Abebe, Sosina
• Application Number:
  US12/717,413
• Publication Number:
  US 20100225626A1
• Time in Patent Office: 1,321 Days
• Field of Search: 345/205, 345/98, 345/211, 345/204, 345/100, 349/40, 349/106
• US Class Current: 345/205
• CPC Class Codes: G02F 1/136204 Arrangements to prevent high voltage or static electricity failures
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2330/04 Display protection
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: H01L 23/60 Protection against electrostatic charges or discharges, e.g. Faraday shields
• CPC Class Codes: H01L 27/0251 for MOS devices
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

A liquid crystal display includes an array substrate, a color filter substrate facing the array substrate, and a liquid crystal layer provided between the array substrate and the color filter substrate. The array substrate includes a driving device, at least one conductive wiring, and a transient voltage suppressor. The driving device includes a driver. The driver has at least one common voltage terminal. The conductive wiring has a connection point and is coupled to the common voltage terminal of the driver. The transient voltage suppressor is coupled to a ground terminal and the connection point, and the connection point is near the common voltage terminal.

Claims

1. A liquid crystal display, comprising:

an array substrate;

a color filter substrate facing the array substrate;

a liquid crystal layer provided between the array substrate and the color filter substrate;

a driving device provided on the array substrate and comprising a driver, the driver having a first common voltage terminal and a second common voltage terminal for outputting a common voltage;

a first conductive wiring and a second conductive wiring provided on the array substrate, wherein the first conductive wiring is disposed on a first side and within a non-active display region of the array substrate, the second conductive wiring is disposed on a second side and within a non-active display region of the array substrate, the second side is opposite the first side, the first conductive wiring comprises a first connection point and is coupled to the first common voltage terminal of the driving device, and the second conductive wiring comprises a second connection point and is coupled to the second common voltage terminal of the driving device; and

a first transient voltage suppressor and a second transient voltage suppressor both coupled to a ground terminal, the first transient voltage suppressor being coupled to the first conductive wiring on the first side through the first connection point, and the second transient voltage suppressor being coupled to the second conductive wiring on the second side through the second connection point;

wherein the first transient voltage suppressor is coupled to the driver of the driving device through the first connection point of the first conductive wiring, the first connection point is near the first common voltage terminal, the second transient voltage suppressor is coupled to the driver of the driving device through the second connection point of the second conductive wiring, and the second connection point is near the second common voltage terminal.

2. The liquid crystal display according to claim 1, further comprising a pixel array, and wherein the driving device further comprises a driving circuit coupled to the pixel array for controlling the pixel array.

3. The liquid crystal display according to claim 2, wherein the non-active display region surrounding the pixel array, and the first transient voltage suppressor, the second transient voltage suppressor, and the driver are all located in the non-active display region.

4. The liquid crystal display according to claim 2, wherein the first transient voltage suppressor, the second transient voltage suppressor, and the driver are all located on the same side of the array substrate.

5. The liquid crystal display according to claim 4, wherein the distance between the first transient voltage suppressor and the first common voltage terminal is less than ¼

of the length of the side of the array substrate.

6. The liquid crystal display according to claim 2, wherein the array substrate is connected to a flexible printed circuit board, and the first transient voltage suppressor and the second transient voltage suppressor are both located on the flexible printed circuit board.

7. The liquid crystal display according to claim 6, wherein the flexible printed circuit board further comprises an auxiliary wiring, and the auxiliary wiring is coupled between the first transient voltage suppressor and the first connection point, coupled between the second transient voltage suppressor and the second connection point, and coupled to a common electrode terminal.

8. The liquid crystal display according to claim 1, wherein the sustained voltage of the first transient voltage suppressor and the second transient voltage suppressor under a normal state is larger than or equal to the operating voltage of the driver.

9. The liquid crystal display according to claim 1, wherein the voltage provided by the first transient voltage suppressor and the second transient voltage suppressor under a cutoff state is smaller than the sustained voltage of the driver.