Video display system

• US 8,350,790 B2
• Filed: 03/13/2009
• Issued: 01/08/2013
• Est. Priority Date: 11/01/2003
• Status: Active Grant

• Current Assignee: Ignite USA (Ignite)
• Original Assignee: Olympus Corporation, Silicon Quest Kabushiki-Kaisha
• Inventors: Endo, Taro, Maeda, Yoshihiro, Ichikawa, Hirotoshi, Ishii, Fusao
• Primary Examiner(s): NGUYEN, KIMNHUNG T
• Application Number:
  US12/381,635
• Publication Number:
  US 20090180039A1
• Time in Patent Office: 1,397 Days
• Field of Search: 345 87- 89, 345/690, 345 82- 84, 348/383, 359/630, 359/631
• US Class Current: 345/84
• CPC Class Codes: G02B 26/0841 the reflecting element being moved or deformed by electrostatic means
• CPC Class Codes: H04N 5/144 Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20
• CPC Class Codes: H04N 9/3111 for displaying the colours sequentially, e.g. by using sequentially activated light sources sequential projection in colour photography G03B33/08
• CPC Class Codes: H04N 9/312 Driving therefor driving of electronic spatial light modulators in displays other than projection devices G09G3/34, G09G3/36; control of liquid crystal elements G02F1/133; control of micromechanical modulators G02B26/08

Abstract

A video display system includes a plurality of primary color light sources; and a spatial light modulator (SLM) for modulating an illumination light emitted from at least one of the plurality of primary light sources. The video display system further includes a display controller for controlling a process to display a sequence of video images within a period of one frame comprising each of a plurality of primary colors and each of a plurality of complementary colors to minimize a number of emissions of each of the plurality of primary color light sources and also displaying the video images of the colors of the plurality of primary colors and the plurality of complementary colors in sequence.

Claims

1. A video display system, comprising:

a plurality of primary color light sources;

a spatial light modulator (SLM) for modulating an illumination light emitted from at least one of the plurality of primary light sources, wherein a display controller for controlling a process to display a sequence of video images within a period of one frame comprising each of a plurality of primary colors and each of a plurality of complementary colors to minimize a number of emissions of each of the plurality of primary color light sources and also displaying the video images of the colors of the plurality of primary colors and the plurality of complementary colors in sequence;

the display controller controlling a display of the sequence of video images within the period of one frame according to a order of;

(a) the video image of a first primary color,

(b) the video image of a first complementary color containing the first primary color,

(c) the video image of a second primary color contained in the first complementary color, and

(d) the video image of a second complementary color containing, the second primary color.

2. The video display system according to claim 1, wherein:

the plurality of primary colors comprising three colors of a red (R) color, a green (G) color and a blue (B) color, and the plurality of complementary colors comprising three colors of cyan (C) color, a magenta (M) color and a yellow (Y) color.

3. A video display system, comprising:

a plurality of primary color light sources; and

a spatial light modulator (SLM) for modulating an illumination light emitted from at least one of the plurality of primary light sources, wherein a display controller for controlling a process to display a sequence of video images within a period of one frame comprising of each of a plurality of primary colors and each of a plurality of complementary colors to maximize a number of emissions of each of the plurality of primary color light sources and also displaying the video images of the colors of the plurality of primary Colors and the plurality of complementary colors in sequence; and

the display controller controlling a display of the sequence of video images within the period of one frame according to a order of;

(a) the video image of a first primary color,

(b) the video image of a first complementary color containing the first primary color,

(c) the video image of a second primary color contained in the first complementary color, and

(d) the video image of a second complementary color containing the second primary color.

4. The video display system according to claim 3, wherein:

the plurality of primary colors comprising three colors of a red (R) color, a green (G) color and a blue (B) color, and the plurality of complementary colors comprising, three colors of can t C) color, a magenta (M) color and a yellow (Y) color.

5. A video display system comprising:

a plurality of primary color light sources; and

a spatial light modulator (SLM) for modulating an illumination light emitted from at least one of the plurality of primary light sources, wherein a display controller for controlling a process to display a sequence of video images within a period of one frame comprising of each of a plurality of primary colors and each of a plurality of complementary colors to maximize a number of emissions of each of the plurality of primary color light sources and also displaying the video images of the colors of the plurality of primary colors and the plurality of complementary colors in sequence;

the display controller controlling a display of the sequence of video images within the period of one frame according to the order of;

(a) the video image of as first primary color,

(b) the video image of a first complementary color containing the first primary color,

(c) the video image of a second primary color that is in a complementary relationship with the first complementary color, and

(d) the video image of a second complementary color containing the second primary color.

6. A video display system comprising:

a plurality of primary color light sources; and

a spatial light modulator (SLM) for modulating an illumination light emitted from at least one of the of primary light sources, wherein a display controller for controlling a process to disease sequence of video images within a period of one frame comprising of each of a plurality of primary colors and each of a plurality of complementary colors to maximize a number of emissions of each of the plurality of primary color light sources and also displaying the video images of the colors of the plurality of primary colors and the plurality of complementary colors in sequence;

the display controller controlling a display of the sequence of video images within the period of one frame according to the order of;

(a) the first video image of a first primary color,

(b) the video image of a first complementary color that is in a complementary relationship with the first primary color,

(c) the second video image of the first primary color,

(d) the video image of a second complementary color containing the first primary color,

(e) the video image of a second primary color not contained in the second complementary color,

(f) the video image of a third complementary color

(g) the video image of a third primary color.

7. The video display system according to claim 6, wherein:

the display controlling the display of the video image of the first primary color based on a color visibility to the human eye.

8. The video display system according to claim 6, wherein:

the display controlling the display of the video image of the first primary color based on a brightness of each color in the video image represented by an input video signal.

9. A video display system comprising:

plurality of primary color light sources; and

a spatial light modulator (SLM) for modulating an illumination light emitted from at least one of the plurality of primary light sources, wherein a display controller for, controlling a process to display a sequence of video images within a period of one frame comprising of each of a plurality of primary colors and each of a plurality of complementary colors to maximize a number of emissions of each of the plurality of primary color light sources and also displaying the video images of the colors of the plurality of primary colors and the plurality of complementary colors in sequence;

the display controller controls a period for displaying the video image of a first complementary color complementary to the first primary color between a display period P1 for the first video image of the first primary color and a display period P2 for the second video image of the first primary color, where the display periods P1 and P2 are obtained by dividing a display period with the period of one frame for the video image of the first primary color into two periods;

the display controller controls a period for displaying the video image of a second complementary color complementary to the second primary color between a display period P3 for the first video image of the second primary color and a display period P4 for the second video image of the second primary color, where the display periods P3 and P4 are obtained by dividing the display period for the video image of the second primary color within the period of one frame into two periods, and the display controller controls a period for displaying the video image of a third complementary color complementary to the third primary color between a display period P5 for the first video image of the third primary color and a display period P6 for the second video image of the third primary color, where the display periods P5 and P6 are obtained, by dividing the display period for the video image of the third primary color within the period of one frame into two periods.

10. A video display system, comprising:

an image processing unit receives continuously an input video signal including input frame signals for generating an output video signal having a higher frame rate than the input video signal; and

a spatial light modulator (SLM) applies the output video signal for modulating an illumination light, wherein the image processing unit further receives an individual frame signal of the input video signal into a frame for sequentially displaying a plurality of sub-frame video images in different colors within a display frame, and the image processing unit further generates the output video signal includes a frame signal for sequentially displaying the sub-frame video images of different colors, wherein

a number of gray scale levels of a sub-frame video image of each color of the output video signal is smaller, or smaller in a part of sub-frame images, than a number of gray scale levels of a sub-frame video image of each color of the input video signal.

11. The video display system according to claim 10, wherein:

the image processing unit receives the input video signal comprising the sub-frame video images further comprise at;

least three colors of a red (R) color, a green (G) color and a blue (B) color, and

the image processing unit generates the output video signal comprising the sub-frame video images for displaying images of at least three primary colors of red, green and blue colors and three complimentary colors of cyan (C), magenta (M) and yellow (Y) colors.

12. The video display system according to claim 10, wherein:

the image processing units receives the input video signals comprising sub-frame video images for displaying at least three colors of a red (R)color, a green (G) color and a blue (B) color, and the image processing unit generates the output video signal includes a frame signal to sequentially display the sub-frame video images of at least the red, green and blue colors, and a frame signal to display the sub-frame video image of one color among a white (W) color, a gray (Gy) color and a black (K) color.

13. The video display system according to claim 10, wherein:

the image processing unit receives the video input signal including a frame signal to sequentially display sub-frame video images of a plurality of colors comprising sub-frame signals for at least three primary colors of a red (R) color, a green (G) color and a blue (B) color, and the image processing unit generates the output video signal includes a frame signal including sub-frame signals to sequentially display the sub-frame video images of at least the three primary colors and at least one complementary color, wherein the sub-frame video image of the at least one complementary color is sandwiched between the sub-frame video images of two adjacent primary colors for sequentially displaying a frame signal of the output video signal.

14. The video display system according to claim 13, wherein:

the image processing units generates the output video signals including the sub-frame signals of a first complementary color containing a first primary color subsequent to the sub-frame signal of the first primary color, and the sub-frame signal of a second primary color without the first complementary color subsequent to the sub-frame signal of the first complementary color.

15. The video display system according to claim 10, wherein:

the image processing unit generates the output video signal including at least a sub-frame signal for displaying a video image of one color having a fewer number of gray scale levels than the sub-frame signals for displaying video images of other colors.

16. The video display system according to claim 10, wherein:

the image processing unit generates the output video signal including at least a sub-frame signal for displaying a video image of one color having it larger number of times of displaying per frame period than the sub-frame signals for displaying video images of other colors.

17. The video display system according to claim 10, wherein;

the image processing unit generates the output video signal including at least a sub-frame signal for displaying a video image of one color having two-bit, or less, gray scale data per pixel.

18. The video display system according to claim 10, wherein:

the image processing unit generates the output video signal including one sub-frame signal for displaying video images of the plurality of colors sequentially having a sub-frame rate greater than or equal to 540 Hz.

19. The video display system according to claim 10, wherein:

the image processing unit generates the output video signal including o sub-frame signal for displaying video images of the plurality of colors sequentially having a sub-frame rate greater than or equal to 1080 Hz.

20. The video display system according to claim 10, wherein:

the SLM further comprising a mirror device implemented with a plurality of deflectable micromirrors.

21. A video display system comprising:

an image processing unit receives continuously an input video signal including input frame signals for generating an output video signal including output frame signals having a higher frame rate than the input frame signals; and

a spatial light modulator (SLM) applies the output frame signals for modulating an illumination light, wherein the input frame signal comprises signals to sequentially display sub-frame video images of a plurality of colors,

the image processing units generates the output video signal includes sub-frame signals of the plurality of colors applied to the SLM to carry out a modulation process to sequentially display the sub-frame video images of the plurality of colors; and

a number of gray scale levels of a sub-frame video image of each color of the output video signal is smaller, or smaller in a part of sub-frame images, than a number of gray scale levels of a sub-frame video image of each color of the input video signal.

22. The video display system according to claim 21 further comprising:

a plurality of semiconductor light sources emitting different color lights, wherein

each of the plurality of semiconductor light sources synchronously emits light with the sub-frame signals of the frame signals included in the output video signal for displaying video image of a same color synchronously.

23. The video display system according to claim 21 further comprising:

as plurality of semiconductor light sources emitting different color lights, wherein an emission cycle of each of the semiconductor light sources for emitting each color is shorter than a cycle of the sub-frame signal for displaying the sub-frame video images of the corresponding same colors according to a frame signal of the input video signal.

24. The video display system according to claim 21, wherein:

the image processing unit receives the sub-frame video signals for displaying the sub-frame video images of a plurality of colors further include a sub-frame video signal for displaying a sub-frame video image of a blue (B) color having a smaller number of gray scale levels than the number of gray scale levels for displaying the sub-frame video images of other colors.

25. The video display system according to claim 21, wherein:

the image processing unit receives the sub-frame video signals for displaying the sub-frame video images of a plurality of colors includes the sub-frame signals for displaying sub-frame video image of one color among white (W), gray (Gy) and black (K), with a smaller number of gray scale levels than the number of gray scale levels of the sub-frame signals for displaying video images of other colors.

26. The video display system according to claim 21, further comprising:

a plurality of semiconductor light sources for emitting different color lights, wherein said plurality of semiconductor light sources further emits a white illumination light by simultaneously emitting the plurality of semiconductor light sources.

27. The video display system according to claim 21, wherein:

a plurality of the semiconductor light sources of different colors emit a color-combined illumination light, wherein each of the plurality of semiconductor light sources for each of said colors are controlled to synchronously change an emission pattern according to the output sub-frame video signal for displaying sub-frame video image of a corresponding color.

28. The video display system according to claim 21, wherein:

the SLM further comprising a mirror device implemented with a plurality of deflectable micromirrors.