Liquid crystal display panel capable of easily adjusting grayscale voltage

• US 20070132689A1
• Filed: 12/08/2006
• Published: 06/14/2007
• Est. Priority Date: 12/08/2005
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Innolux Display Corporation (InnoLux Corporation)
• Inventors: Li, Li-Ya, Chen, Yi-Yin
• Application Number:
  US11/636,225
• Publication Number:
  US 20070132689A1
• Time in Patent Office: Days
• US Class Current: 345/89
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/029 by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
• 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 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A liquid crystal display panel includes a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate. The first substrate and the second substrate cooperatively form a multiplicity of pixels. The first substrate also includes a pixel pad electrically connected to one of the pixels. According to this configuration, a grayscale voltage of the liquid crystal display panel can be conveniently adjusted.

Claims

1. A liquid crystal display panel, comprising:

a first substrate;

a second substrate opposite to said first substrate and cooperating with said first substrate to define a plurality of pixels, wherein the pixels are arranged in a matrix for displaying of images; and

a liquid crystal layer sandwiched between said first substrate and said second substrate;

wherein said first substrate comprises a pixel pad, and said pixel pad electrically connects to a predetermined one of the pixels.

2. The liquid crystal display panel in claim 1, wherein each of the pixels comprises three sub-pixels configured to provide the colors red, green, and blue respectively, and said pixel pad comprises three sub-pixel pads electrically connected respectively to the three sub-pixels of said predetermined one of the pixels.

3. The liquid crystal display panel in claim 1, wherein said first substrate comprises a plurality of thin film transistors and a driving circuit, and said driving circuit is adjacent to said pixel pad.

4. A liquid crystal display panel, comprising:

a first substrate;

a second substrate opposite to said first substrate;

a plurality of pixels cooperatively defined by said first substrate and said second substrate, the pixels arranged in a matrix; and

a liquid crystal layer sandwiched between said first substrate and said second substrate;

wherein said first substrate comprises a pixel pad, and said pixel pad is electrically connected to a predetermined one of the pixels; and

when a voltage is applied to said one of the pixels, said pixel pad carries a corresponding voltage, and a gamma value of said liquid crystal display panel can be adjusted by detecting said corresponding voltage and adjusting the voltage applied to said one of the pixels accordingly.

5. The liquid crystal display panel in claim 4, wherein each of the pixels comprises three sub-pixels configured to provide the colors red, green, and blue respectively, and said pixel pad comprises three sub-pixel pads electrically connected respectively to the three sub-pixels of said predetermined one of the pixels.

6. The liquid crystal display panel in claim 4, wherein said first substrate comprises a plurality of thin film transistors and a driving circuit, and said driving circuit is adjacent to said pixel pad.

7. The liquid crystal display panel in claim 6, wherein said driving circuit is configured to provide a voltage to the pixels, and the voltage provided to the pixels is adjustable.

8. A method of measuring grayscale voltages of an LCD panel without using and optical instrument, comprising steps of:

providing a first substrate;

providing a second substrate opposite to said first substrate;

providing a plurality of pixels cooperatively defined by said first substrate and said second substrate, the pixels arranged in a matrix; and

providing a liquid crystal layer sandwiched between said first substrate and said second substrate;

wherein said first substrate comprises a pixel pad, and said pixel pad is electrically connected to a predetermined one of the pixels;

applying a voltage is to said one of the pixels so tat said one of the pixels carries a corresponding voltage;

detecting said corresponding voltage and adjusting the voltage applied to said one of the pixels accordingly; and

adjusting a gamma value of said liquid crystal display panel.