Display device capable of dynamically compensating effect of environmental light

• US 20030038815A1
• Filed: 02/07/2002
• Published: 02/27/2003
• Est. Priority Date: 08/23/2001
• Status: Abandoned Application

• Current Assignee: Compal Electronics Incorporated
• Original Assignee: Compal Electronics Incorporated
• Inventors: Tsai, Wen-Sung
• Application Number:
  US09/683,729
• Publication Number:
  US 20030038815A1
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G09G 1/285 Interfacing with colour displays, e.g. TV receiver
• 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 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

A display device is provided for a computer system. The display device includes a screen for displaying a color picture image formed by at least two light sources, at least one sensor for detecting light around the screen and generating a corresponding detecting signal, a gray level adjusting device for adjusting brightness of light emitted by the light sources according to the detecting signal so as to reduce an impact of light around the screen to the color picture image on the screen, and a controller for controlling operations of the display device.

Claims

1. A display device for a computer system comprising:

a screen for displaying a color picture image for a user in front of the screen, the color picture image formed by light emitted from at least two light sources of different colors;

at least one sensor for detecting light around the screen and generating a corresponding detecting signal;

a gray level adjusting device for adjusting brightness of light emitted by the light sources according to the detecting signal so as to reduce an impact of around the screen to the color picture image on the screen; and

a controller for controlling operations of the display device.

2. The display device of claim 1 wherein the sensor is disposed at a front side of the display device for sensing light emitted toward the screen.

3. The display device of claim 1 wherein the gray level adjusting device adjusts the brightness of the light emitted by the light sources so as to generate an expected picture image.

4. The display device of claim 1 wherein the controller is a display card of the computer system.

5. The display device of claim 1 wherein the computer system is a portable computer, and the display device is a liquid crystal display installed on the portable computer.

6. A display device for a computer system comprising:

a screen for displaying a picture image for a user in front of the screen;

at least one sensor for detecting light emitted to a sensing surface of the sensor and generating a corresponding detecting signal; and

a controller for adjusting the picture image displayed on the screen according to the detecting signal;

wherein the sensing surface of the sensor faces backwards so as to detect light emitted from the back of the display device.

7. The display device of claim 6 wherein the sensor is capable of detecting a brightness of light emitted to the sensing surface.

8. The display device of claim 6 wherein the sensor is capable of detecting a color of light emitted to the sensing surface.

9. The display device of claim 7 wherein the controller adjusts a brightness of the picture image according to the detecting signal.

10. The display device of claim 9 wherein when the brightness of light detected by the sensor is greater than a predetermined value, the controller will correspondingly increase the brightness of the picture image.

11. The display device of claim 8 wherein the controller adjusts a color of the picture image according to the detecting signal.

12. The display device of claim 11 wherein the controller adjusts the color of the picture image so as to generate an expected picture image.

13. The display device of claim 6 wherein the controller is a display card of the computer system.

14. The display device of claim 6 wherein the computer system is a portable computer, and the display device is a liquid crystal display installed on the portable computer.