Projector systems with reduced flicker

• US 7,230,584 B2
• Filed: 05/20/2003
• Issued: 06/12/2007
• Est. Priority Date: 05/20/2003
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Clairvoyante, Inc. (Samsung Electronics Co. Ltd.)
• Inventors: Elliott, Candice Hellen Brown
• Primary Examiner(s): Patel; Nitin
• Application Number:
  US10/442,552
• Publication Number:
  US 20040233339A1
• Time in Patent Office: 1,484 Days
• Field of Search: 345/88, 345/103, 345/589, 345/596, 345/605, 345/694, 345 30- 33, 345/63, 362/318, 362/293, 359/234, 359/618, 359/722, 359/891, 359/885, 348/743, 315/364, 315/408, 353 84- 85, 356/418
• US Class Current: 345/32
• CPC Class Codes: H04N 9/3114 by using a sequential colour filter producing one colour at a time
• CPC Class Codes: H04N 9/3129 scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20

Abstract

An image display system is disclosed comprising an output unit and a means for displaying a plurality of color frames on the output unit. Each color frame is subpixelated and displayed over time. One of the color planes is a color plane of a low luminance color, and the low luminance color plane is displayed with greater frequency over time than other displayed color frames.

Claims

1. An image system comprising:

an output unit; and

means for displaying a plurality of color frames on the output unit, wherein each color frame is subpixelated and displayed over time, one of the color fields is a color field of a low luminance color, and the low luminance color field is displayed with greater frequency over time than the other displayed color fields, wherein the means for displaying comprise a set of color filters placed upon a color wheel such that the regions of low luminance color filter upon said color wheel is greater in number than the other color filters.

2. The image display system of claim 1, wherein the means for displaying further comprises:

a set of monochromatic light emitting diodes for a direct view output unit.

3. The image display system of claim 1, wherein the low luminance color field is substantially blue and the blue color field is displayed twice as often as other color fields.

4. The image display system of claim 3, wherein the blue color field is displayed with approximately half of the intensity of the other color fields.

5. The image display system of claim 3, wherein the blue color field is displayed at a first intensity at a first time and the blue color field is displayed at a second intensity at a second time interspersed by a non-blue color field.

6. The image display system of claim 3, further comprising:

at least one high luminance color filter placed upon said color wheel such that the at least one high luminance color filter is placed opposite said low luminance color filter upon the color wheel.

7. The image display system of claim 6, wherein the at least one high luminance color filters one of a group comprising either white or clear filter.

8. An image system comprising:

an output unit;

a means for displaying each of a plurality of color frames, each color frame is subpixelated and displayed over time, one of the color fields is a color field of a low luminance color and the low luminance color is displayed for a time period less than other displayed color, wherein the means for displaying each of a plurality of color frames further comprises a set of color filters placed upon a color wheel such that a total angular distance of a low luminance color filter upon the color wheel is smaller in length than the other color filters on the color wheel wherein the low luminance color filter is divided into separate angular regions upon the color wheel.

9. A color wheel for display system comprising:

A set of color filters including at least one low luminance color filter such that a total angular distance of the low luminance color filter is smaller in length than the other color filters, wherein the set of color filters includes at least one high luminance color filter such that at least one high luminance color filter is placed opposite the low luminance color filter upon the color wheel wherein the at least one high luminance color filter is one of a group comprising either white or clear color filter.

10. The color wheel of claim 9, wherein the low luminance color filter is divided into separate angular regions.

11. The color wheel of claim 9, wherein the set of color filters includes at least one low radiance color filter such that at least one low radiance color filter is placed opposite the low luminance color filter upon the color wheel.

12. The color wheel of claim 9, wherein the at least one low radiance color filter is a black color filter.

13. The color wheel of claim 9, wherein the set of color filter includes at least one low radiance color filter such that one of at least one low radiance color filter is placed in opposition to the low luminance color filter and a least one separate low radiance color filter is placed in opposition to higher luminance color filters.