METHOD AND SYSTEM FOR ADJUSTING LIGHT OUTPUT FROM A LIGHT SOURCE

• US 20120104954A1
• Filed: 10/27/2010
• Published: 05/03/2012
• Est. Priority Date: 10/27/2010
• Status: Active Grant

• Current Assignee: Epistar Corporation
• Original Assignee: Taiwan Semiconductor Manufacturing Company Limited
• Inventors: HUANG, Hsin-Chieh
• Granted Patent: US 8,786,197 B2
• Time in Patent Office: Days
• US Class Current: 315/158
• CPC Class Codes: G01J 1/44 Electric circuits for command of an exposure part G03B7/02
• CPC Class Codes: H05B 41/36 Controlling
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A system having a light guide adapted to collect light from a light source, a light detector attached to the light guide, a controller electrically connected to an output of the light detector, and a driver for driving the light source detachably connected to an output of the controller. The driver includes a memory that stores a calibration value for the light source.

Claims

1. A light adjusting system comprising:

a light guide adapted to collect light from a light source;

a light detector coupled with the light guide;

a controller electrically connected to an output of the light detector; and

a driver for driving the light source detachably connected to an output of the controller, the driver comprising a memory adapted to store a calibration value for the light source, the controller being adapted to control the driver responsive to the output of the light detector.

2. The system of claim 1, the light source being an LED.

3. The device of claim 1, the driver connected to the controller via wired connection.

4. The system of claim 1, the driver connected to the controller via a wireless connection.

5. The system of claim 1, the driver connected to the controller via an optical connection.

6. The system of claim 5, wherein the optical connection is an optical fiber or a light pipe.

7. The system of claim 1, the driver adapted to adjust an intensity of the light source.

8. The system of claim 1, the light detector being at least one of a charge-coupled device or a complementary metal oxide semiconductor (CMOS) sensor.

9. The system of claim 1, the light detector being at least one of a light intensity detector or a light color detector.

10. A display system comprising:

a display device comprising;

at least one LED; and

at least one driver for driving the LED, the driver comprising a memory adapted to store a calibration value for the LED;

a light guide adapted to collect light from the at least one LED;

a light detector attached to the light guide; and

a controller electrically connected to an output of the light detector and detachably connected to an input of the driver.

11. The display system of claim 10, the driver connected to the controller via a wired connection.

12. The display system of claim 10, the driver connected to the controller via a wireless connection.

13. The display system of claim 10, the controller connected to the driver via an optical connection.

14. The display system of claim 13, wherein the optical connection is an optical fiber or a light pipe.

15. The display system of claim 10, wherein the light detector is at least one of a light intensity detector or a light color detector.

16. A method comprising:

measuring a light output at a display surface of a display device;

comparing the measured light output to a predetermined threshold value;

adjusting a light source in the display device so that the measured light output substantially matches the predetermined threshold value; and

storing a calibration value based on the adjusted light output.

17. The method of claim 16, the predetermined threshold value being a preset value for the display device.

18. The method of claim 16, the predetermined threshold value based on a measured value of a light output at a predetermined portion of the display surface.

19. The method of claim 16, the predetermined threshold value based on a measured value of a light output at a display surface of a different display.

20. The method of claim 16, the method further comprises attaching a portable light-detecting portion for measuring the light output of the display surface before measuring the light output of the display surface and detaching the portable light-detecting portion after storing the calibration.