Display apparatuses and methods for color temperature adjustment thereof

• US 20060279520A1
• Filed: 06/13/2006
• Published: 12/14/2006
• Est. Priority Date: 06/14/2005
• Status: Abandoned Application

• Current Assignee: BenQ Corporation (Qisda Corporation)
• Original Assignee: BenQ Corporation (Qisda Corporation)
• Inventors: Chen, Min-Jye
• Application Number:
  US11/452,657
• Publication Number:
  US 20060279520A1
• Time in Patent Office: Days
• US Class Current: 345/102
• 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 2360/18 Use of a frame buffer in a display terminal, inclusive of the display panel
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A method for color temperature adjustment. A first color temperature parameter and a second color temperature parameter are acquired. It is determined whether the difference between the first and second color temperature parameters falls into an acceptable range. When the difference between the first and second color temperature parameters falls into the acceptable range, a first voltage value corresponding to a voltage level currently directed to a backlight module of a display apparatus is stored in a storage device of the display apparatus.

Claims

1. A method for color temperature adjustment comprising:

acquiring a first color temperature parameter and a second color temperature parameter;

determining whether the difference between the first and second color temperature parameters falls into an acceptable range; and

storing a first voltage value corresponding to a voltage level currently directed to a backlight module of a display apparatus in a storage device of the display apparatus when the difference between the first and second color temperature parameters falls into the acceptable range,

enabling the display apparatus to direct a voltage level corresponding to the stored voltage value to the backlight module thereof when the display apparatus powers on.

2. The method as claimed in claim 1 wherein the first and second color temperature parameters are measured by CIE chromaticity coordinates.

3. The method as claimed in claim 1 wherein the first color temperature parameter represents color temperature detected by a color temperature metrology apparatus, and the second color temperature parameter represents a base color temperature.

4. The method as claimed in claim 1 further comprising:

determining a second voltage value contingent upon the difference between the first and second color temperature parameters when the difference between the first and second color temperature parameters does not fall into the acceptable range; and

directing a voltage level corresponding to the second voltage value to the backlight module of the display apparatus.

5. The method as claimed in claim 1 wherein the first color temperature parameter corresponds to a color temperature flag, indicating that images with a particular color temperature type are displayed.

6. The method as claimed in claim 5 wherein the storing step further comprises storing the color temperature flag in the storage device of the display apparatus, the color temperature flag corresponding to the first voltage value.

7. The method as claimed in claim 1 wherein the backlight module is composed of a plurality of white light-emitting diodes (LEDs), and the first voltage value corresponds to the voltage level currently directed to the white LEDs.

8. The method as claimed in claim 1 wherein the backlight module is composed of a plurality of red, green and blue light-emitting diodes (LEDs), and the first voltage value comprising three sub-voltage values correspond to voltage levels currently directed to the red, green and blue LEDs.

9. A machine-readable storage medium for storing a computer program which, when executed by a processing unit, performs a method of color temperature adjustment, the method comprising:

acquiring a first color temperature parameter and a second color temperature parameter;

determining whether the difference between the first and second color temperature parameters falls into an acceptable range; and

storing a first voltage value corresponding to a voltage level currently directed to a backlight module of a display apparatus in a storage device of the display apparatus when the difference between the first and second color temperature parameters falls into the acceptable range,

enabling the display apparatus to direct a voltage level corresponding to the stored voltage value to the backlight module thereof when the display apparatus powers on.

10. A display apparatus for color temperature adjustment comprising:

a backlight module;

a storage apparatus storing a first voltage level; and

a processing unit coupled to the backlight module and the storage device, acquiring the first voltage value and directing a voltage level corresponding to the voltage value to the backlight module.

11. The display apparatus as claimed in claim 10 wherein the processing unit acquires a first color temperature parameter and a second color temperature parameter, determines whether the difference between the first and second color temperature parameters falls into an acceptable range, and stores the first voltage value corresponding to the voltage level currently directed to the backlight module in the storage device when the difference between the first and second color temperature parameters falls into the acceptable range.

12. The display apparatus as claimed in claim 11 wherein the first and second color temperature parameters are measured by CIE chromaticity coordinates.

13. The display. apparatus as claimed in claim 11 wherein the first color temperature parameter represents color temperature detected by a color temperature metrology apparatus, and the second color temperature parameter represents a base color temperature.

14. The display apparatus as claimed in claim 11 wherein the processing unit determines a second voltage value contingent upon the difference between the first and second color temperature parameters when the difference between the first and second color temperature parameters does not fall into the acceptable range, and directs a voltage level corresponding to the second voltage value to the backlight module.

15. The display apparatus as claimed in claim 11 wherein the first color temperature parameter corresponds to a color temperature flag, indicating that images with a particular color temperature type are displayed.

16. The display apparatus as claimed in claim 15 wherein the processing unit stores the color temperature flag in the storage device, the color temperature flag corresponding to the first voltage value.

17. The display apparatus as claimed in claim 10 wherein the backlight module is composed of a plurality of light-emitting diodes (LEDs).

18. The display apparatus as claimed in claim 10 wherein the backlight module is composed of a plurality of white light-emitting diodes (LEDs), and the first voltage value corresponds to the voltage level currently directed to the white LEDs.

19. The display apparatus as claimed in claim 10 wherein the backlight module is composed of a plurality of red, green and blue light-emitting diodes (LEDs), and the first voltage value comprising three sub-voltage values correspond to voltage levels currently directed to the red, green and blue LEDs.