System and method for flat panel display brightness correction

• US 20060114218A1
• Filed: 05/16/2005
• Published: 06/01/2006
• Est. Priority Date: 11/18/2004
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Tsai, Chung-Kuang, Ho, Chia-Pu
• Application Number:
  US11/130,013
• Publication Number:
  US 20060114218A1
• Time in Patent Office: Days
• US Class Current: 345/102
• 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 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A system and a method for flat panel display brightness correction, removing brightness difference between flat panel displays in one product line. The brightness correction system comprises a converter for control of color temperature and brightness of an image frame, and a backlight controller for generating corrected light for display in the image frame.

Claims

1. A flat panel display, comprising:

a timing controller for generating a digital signal based on a control signal;

a converter for transforming an image signal to a corresponding output signal;

a memory device for storing a brightness parameter;

a backlight controller for generating a brightness control signal according to the brightness parameter;

an inverter for receiving the brightness control signal to generate a corresponding current; and

a display panel, adapted to receive the output signal and the corresponding current, for generating a visual output.

2. The flat panel display as claimed in claim 1, wherein the converter comprises an arithmetic circuit.

3. The flat panel display as claimed in claim 1, wherein the converter is configured to provide gamma correction, white balance, or color temperature compensation.

4. The flat panel display as claimed in claim 1, wherein the memory device comprises Electrically Erasable Programmable Read-Only Memory (EEPROM) or FLASH ROM.

5. The flat panel display as claimed in claim 1, wherein the display panel comprises:

a column driver configured to receive the image signal from the converter; and

a row driver configured to receive the control signal to synchronize scan lines.

6. A method for correcting brightness of a plurality of flat panel displays, comprising:

driving the plurality of flat panel displays based on a predetermined condition;

determining brightness of each flat panel display;

identifying the lowest brightness among the brightness determined; and

calculating a set of brightness parameters for each flat panel display according to the lowest brightness;

adjusting the brightness of each flat panel display in accordance with the set of brightness parameters for each flat panel display.

7. The method as claimed in claim 6, further comprising determining the predetermined condition comprising the following steps:

processing white balance for each flat panel display such that the color temperatures thereof are equal; and

providing a selected voltage or current to drive the flat panel displays to display full white screens.

8. The method as claimed in claim 7, wherein determining brightness of each flat panel display further comprises determining brightness of each full white screen.