LCD PANEL HAVING SHARED SHORTING BARS FOR ARRAY INSPECTION AND PANEL INSPECTION

• US 20100127258A1
• Filed: 08/09/2009
• Published: 05/27/2010
• Est. Priority Date: 11/26/2008
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Original Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Inventors: Kang, Liang-Hao, Tsai, Yi-Cheng
• Application Number:
  US12/538,154
• Publication Number:
  US 20100127258A1
• Time in Patent Office: Days
• US Class Current: 257/48
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136254 Checking; Testing
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

An LCD panel includes a panel area, a plurality of shorting bars, a plurality of panel test pads, and a plurality of array test pads. The panel area includes a plurality of scan lines and a plurality of data lines. The plurality of shorting bars is located inside the panel area. The plurality of scan lines and the plurality of data lines are electrically connected to corresponding shorting bars of the plurality of shorting bars through a switch circuit. The plurality of panel test pads is located inside the panel area. The plurality of panel test pads is electrically connected to the plurality of shorting bars respectively. The plurality of array test pads is located outside the panel area. The plurality of array test pads is electrically connected to corresponding panel test pads of the plurality of panel test pads.

Claims

1. An LCD panel having shared shorting bars for an array inspection and a panel inspection, comprising:

a panel area, comprising a plurality of scan lines and a plurality of data lines;

a plurality of shorting bars, disposed inside the panel area, the plurality of scan lines and the plurality of data lines electrically connected to corresponding shorting bars of the plurality of shorting bars through a switch circuit;

a plurality of panel test pads, disposed inside the panel area, the plurality of panel test pads electrically connected to the plurality of shorting bars respectively; and

a plurality of array test pads, disposed outside the panel area, the plurality of array test pads electrically connected to corresponding panel test pads of the plurality of panel test pads.

2. The LCD panel of claim 1, wherein the plurality of data lines further comprises a plurality of red pixel data lines, a plurality of green pixel data lines, and a plurality of blue pixel data lines.

3. The LCD panel of claim 2, wherein the plurality of shorting bars comprises:

a first shorting bar, electrically connected to odd red pixel data lines of the plurality of red pixel data lines;

a second shorting bar, electrically connected to odd green pixel data lines of the plurality of green pixel data lines;

a third shorting bar, electrically connected to odd blue pixel data lines of the plurality of blue pixel data lines;

a fourth shorting bar, electrically connected to even red pixel data lines of the plurality of red pixel data lines;

a fifth shorting bar, electrically connected to even green pixel data lines of the plurality of green pixel data lines;

a sixth shorting bar, electrically connected to even blue pixel data lines of the plurality of blue pixel data lines;

a seventh shorting bar, electrically connected to odd scan lines of the plurality of scan lines; and

an eighth shorting bar, electrically connected to even scan lines of the plurality of scan lines.

4. The LCD panel of claim 3, wherein the plurality of panel test pads comprises:

a first data test pad, electrically connected to the first shorting bar;

a second data test pad, electrically connected to the second shorting bar;

a third data test pad, electrically connected to the third shorting bar;

a fourth data test pad, electrically connected to the fourth shorting bar;

a fifth data test pad, electrically connected to the fifth shorting bar;

a sixth data test pad, electrically connected to the sixth shorting bar;

a first scan test pad, electrically connected to the seventh shorting bar; and

a second scan test pad, electrically connected to the eighth shorting bar.

5. The LCD panel of claim 4, wherein the plurality of array test pads comprises:

an odd data test pad, electrically connected to the first data test pad, the second data test pad, and the third data test pad;

an even data test pad, electrically connected to the fourth data test pad, the fifth data test pad, and the sixth data test pad;

an odd scan test pad, electrically connected to the first scan test pad; and

an even scan test pad, electrically connected to the second scan test pad.

6. The LCD panel of claim 1, wherein the switch circuit comprises:

a first set of switches, electrically connected between the plurality of scan lines and the correspond shorting bars of the plurality of shorting bars; and

a second set of switches, electrically connected between the plurality of data lines and the corresponding shorting bars of the plurality of shorting bars.

7. The LCD panel of claim 6, wherein the plurality of panel test pads further comprises:

a common voltage test pad, electrically connected to a common voltage source of the LCD panel;

a first switch test pad, electrically connected to control ends of the first set of the switches; and

a second switch test pad, electrically connected to control ends of the second set of the switches.

8. The LCD panel of claim 7, wherein the plurality of array test pads further comprises:

a common voltage test pad, electrically connected to the common voltage test pad of the plurality of panel test pads;

a first switch test pad, electrically connected to the first switch test pad of the plurality of panel test pads; and

a second switch test pad, electrically connected to the second switch test pad of the plurality of panel test pads.

9. The LCD panel of claim 7, wherein the panel area further comprises a plurality of pixel electrodes electrically connected to the common voltage source of the LCD panel.

10. The LCD panel of claim 1, wherein the switch circuit is turned on for electrically connecting the plurality of shorting bars and the plurality of array test pads when the array inspection of the LCD panel is executed.

11. The LCD panel of claim 10, wherein the plurality of array test pads is cut after the array inspection of the LCD panel.

12. The LCD panel of claim 11, wherein the switch circuit is turned on for electrically connecting the plurality of shorting bars and the plurality of panel test pads when the panel inspection of the LCD panel is executed.

13. The LCD panel of claim 1, wherein the switch circuit is turned on during the array inspection of the LCD panel and the panel inspection of the LCD panel.

14. The LCD panel of claim 1, wherein the plurality of data lines is divided into a group of odd data lines and a group of even data lines for the array inspection of the LCD panel and the panel inspection of the LCD panel.

15. The LCD panel of claim 14, wherein the plurality of data lines is further divided into a group of red pixel data lines, a group of green data lines and a group of blue pixel data lines for the panel inspection of the LCD panel.