Color correction apparatus

• US 8,169,388 B2
• Filed: 07/02/2007
• Issued: 05/01/2012
• Est. Priority Date: 07/02/2007
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Chen, Wei, Zhong, John, Yin, Victor, Galbraith, Walter J. Jr.
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): PARKER, JEFFREY ALAN
• Application Number:
  US11/772,801
• Publication Number:
  US 20090009442A1
• Time in Patent Office: 1,765 Days
• Field of Search: 345/102, 345/88, 345/87, 345/84, 345/83, 345/55, 345/30, 362/97.1, 362/97.2
• US Class Current: 345/83
• CPC Class Codes: G02B 6/0023 provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white

Abstract

A display system provides a display assembly having a display screen. LEDs are presorted into a plurality of groups, each group of LEDs having substantially the same color that is different than the color of another group. LEDs are selected from one of the groups. The selected LEDs are mounted in the display assembly to illuminate the display screen. A non-electronic color adjuster is mounted in the light path from the selected LEDs to shift the light color to a predetermined color.

Claims

1. A display system, comprising:

a display assembly having a display screen;

a first plurality of LEDs that are;

selected to each produce substantially the same color; and

mounted in the display assembly to illuminate the display screen;

an optical system configured to distribute light to a viewing area of the display screen, wherein the optical system is positioned in a light path from the first plurality of LEDs to the display screen; and

a first non-electronic color adjuster in the light path from the first plurality of LEDs to the optical system, wherein the first non-electronic color adjustor comprises a first color-tinted film configured to shift the light color of the first plurality of LEDs to a first desired color.

2. The display system of claim 1 wherein the first non-electronic color adjuster adjusts the light color of the first plurality of LEDs to a desired white point color.

3. The display system of claim 1 wherein the first non-electronic color adjuster further comprises a second color-tinted film and wherein the first and second color-tinted films shift the light color of the first plurality of LEDs to the first desired color.

4. The display system of claim 1:

further comprising a removable light strip; and

wherein the first plurality of LEDs are mounted on the removable light strip.

5. The display system of claim 1 wherein the first plurality of LEDs are side firing LEDs.

6. The display system of claim 1 further comprising:

a second plurality of LEDs that produce different colored light than the first plurality of LEDs; and

a second non-electronic color adjuster in the light path from the second plurality of LEDs, wherein the second non-electronic color adjustor comprises a second color-tinted film configured to shift the light color of the second plurality of LEDs to a second desired color.

7. A display system, comprising:

a display assembly having an LCD display screen;

a first plurality of LEDs that are;

selected from a bin, wherein a bin comprises a plurality of LEDs that each produce substantially the same color and wherein each bin comprises a color that is different from the other bins; and

mounted in the display assembly to illuminate the LCD display screen;

an optical system configured to distribute light to a viewing area of the display screen, wherein the optical system is positioned in a light path from the first plurality of LEDs to the LCD display screen; and

a first non-electronic color adjuster in the light path from the first plurality of LEDs and between the first plurality of LEDs and the optical system, wherein the first non-electronic color adjustor comprises a first color-tinted film configured to shift the light color of the first plurality of LEDs to a first desired color.

8. The display system of claim 7 wherein the first non-electronic color adjuster adjusts the light color of the first plurality of LEDs to a desired white point color.

9. The display system of claim 7 wherein the first non-electronic color adjuster further comprises a second color-tinted film and wherein the first and second color-tinted films shift the light color of the first plurality of LEDs to the first desired color.

10. The display system of claim 7:

further comprising a removable light strip; and

wherein the first plurality of LEDs are mounted on the removable light strip.

11. The display system of claim 8 wherein the first plurality of LEDs are side firing LEDs.

12. The display system of claim 7 further comprising:

a second plurality of LEDs that are selected from a second bin; and

a second non-electronic color adjuster in the light path from the second plurality of LEDs and between the second plurality of LEDs and the LCD display screen, wherein the second non-electronic color adjustor comprises a second color-tinted film configured to shift the light color of the second plurality of LEDs to a second desired color.

13. A method of correcting the color output of a display system, wherein the display system comprises a display assembly and a display screen, the method comprising:

mounting a first plurality of LEDs in the display assembly to illuminate the display screen, wherein the first plurality of LEDs comprises LEDs of substantially the same color;

mounting an optical system configured to distribute light to a viewing area of the display screen, wherein the optical system is positioned in a light path from the first plurality of LEDs to the display screen; and

mounting a first non-electronic color adjuster in the light path from the first plurality of LEDs to the optical system, wherein the first non-electronic color adjustor comprises a first color-tinted film configured to shift the light color of the first plurality of LEDs to a first desired color.

14. The method of claim 13 wherein the first non-electronic color adjuster shifts the light color of the first plurality of LEDs to a desired white point color.

15. The method of claim 13 wherein the first non-electronic color adjuster further comprises a second color-tinted film and wherein the first and second color-tinted films shift the light color of the first plurality of LEDs to the first desired color.

16. The method of claim 13 wherein mounting the first plurality of LEDs further comprises:

mounting the first plurality of LEDs on a removable light strip; and

mounting the removable light strip in the display assembly.

17. The method of claim 13 wherein the LEDs further comprise side firing LEDs.

18. The method of claim 13 further comprising:

mounting a second plurality of LEDs in the display assembly to illuminate the display screen, wherein the second plurality of LEDs comprises LEDs of substantially the same color and wherein the color of the second plurality of LEDs is different from the color of the first plurality of LEDs; and

mounting a second non-electronic color adjuster in the light path from the second plurality of LEDs, wherein the second non-electronic color adjustor comprises a second color-tinted film configured to shift the light color of the second plurality of LEDs to a second desired color.

19. A method of manufacturing a display system capable of color output correction, the display system comprising a display assembly and an LCD display screen, the method comprising:

mounting a first plurality of LEDs in the display assembly to illuminate the LCD display screen, wherein the first plurality of LEDs comprises a plurality of LEDs from one of a plurality of bins, wherein a bin comprises a plurality of LEDs that each produce substantially the same color and wherein each bin comprises a color that is different from the other bins;

mounting an optical system configured to distribute light to a viewing area of the display screen, wherein the optical system is positioned in a light path from the first plurality of LEDs to the LCD display screen; and

mounting a first non-electronic color adjuster in the light path from the first plurality of LEDs between the first plurality of LEDs and the optical system, wherein the first non-electronic color adjustor comprises a color-tinted film configured to shift the light color of the first plurality of LEDs to a first desired color.

20. The method of claim 19 wherein the first non-electronic color adjuster shifts the light color of the first plurality of LEDs to a desired white point color.

21. The method of claim 19 wherein the first non-electronic color adjuster further comprises a second color-tinted film and wherein the first and second color-tinted films shift the light color of the first plurality of LEDs to the first desired color.

22. The method of claim 19 wherein mounting the first plurality of LEDs further comprises:

mounting the first plurality of LEDs on a removable light strip; and

mounting the removable light strip in the display assembly.

23. The method of claim 19 wherein the LEDs further comprise side firing LEDs.

24. The method of claim 19 further comprising:

mounting a second plurality of LEDs in the display assembly to illuminate the LCD display screen, wherein the second plurality of LEDs comprises LEDs from another of the plurality of bins; and

mounting a second non-electronic color adjuster in the light path from the second plurality of LEDs between the second plurality of LEDs and the LCD display screen, wherein the second non-electronic color adjustor comprises a second color-tinted film to shift the light color of the second plurality of LEDs to a second desired color.