System and Method for Information Handling System LCD White Balance Alignment

• US 20080252589A1
• Filed: 04/16/2007
• Published: 10/16/2008
• Est. Priority Date: 04/16/2007
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Chung, Tze Fung, Koh, Yee Teck
• Granted Patent: US 8,102,358 B2
• Time in Patent Office: Days
• US Class Current: 345/102
• 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 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

LCD panel white balance adjustment provides a desired brightness with minimal impact on optical performance by maximizing Red, Green and Blue gains of the LCD panel for a predetermined color temperature and then adjusting brightness with backlight current. For example, Red, Green and Blue gain settings are set at substantially their maximum value to achieve a color temperature of 6500 degrees and then brightness for the LCD panel is adjusted to substantially 200 nits with the gains remaining at maximized values.

Claims

1. A method for performing a white balance alignment of an information handling system LCD panel, the method comprising:

setting R, G and B gains of the LCD panel to substantially maximized values that provide a predetermined color temperature; and

setting backlight brightness to a value that provides a predetermined brightness level.

2. The method of claim 1 wherein setting backlight brightness further comprises setting a maximum current allowed to the backlight, the maximum current illuminating the backlight at the predetermined brightness level.

3. The method of claim 2 wherein the backlight comprises a cold cathode fluorescent light.

4. The method of claim 1 wherein the color temperature comprises approximately 6500.

5. The method of claim 1 wherein the predetermined brightness level comprises approximately 200 nits.

6. An information handling system comprising:

a housing having a rotatable lid;

plural processing components disposed in the housing and operable to generate visual information;

an LCD panel disposed in the lid and interfaced with the processing components, the LCD panel having a backlight and plural pixels, the LCD panel operable to present the visual information as visual images with backlight directed through the pixels;

a controller associated with the LCD panel and interfaced with the pixels, the controller operable to alter the pixels to control backlight that passes through the pixels according to red, green and blue gain settings; and

flash memory associated with the controller, the flash memory storing controller settings, the controller settings comprising red, green and blue gain settings that are substantially maximized at a predetermined color temperature and a backlight brightness setting having a predetermined brightness level.

7. The information handling system of claim 6 wherein the color temperature comprises approximately 6500 degrees.

8. The information handling system of claim 6 wherein the backlight brightness predetermined level comprises a maximum current level.

9. The information handling system of claim 6 wherein the backlight brightness predetermined level comprises approximately 200 nits.

10. The information handling system of claim 6 wherein the backlight comprises a cold cathode fluorescent light.

11. A system for performing a white balance alignment of an information handling system LCD panel, the system comprising:

a color detector operable to measure an LCD panel color temperature;

a brightness detector operable to measure an LCD panel brightness;

an LCD panel settings manager interfaced with the color detector and the brightness detector, the LCD panel settings manager operable to configure an LCD panel with a substantially maximum LCD panel R, G, and B gain at a predetermined color temperature and to configure a backlight current at a predetermined brightness level with the maximum R, G and B gains.

12. The system of claim 11 wherein the color temperature comprise approximately 6500 degrees.

13. The system of claim 11 wherein the predetermined brightness level comprises approximately 200 nits.

14. The system of claim 11 wherein the backlight comprises a cold cathode fluorescent light.