Video display system

• US 8,493,298 B2
• Filed: 03/13/2009
• Issued: 07/23/2013
• Est. Priority Date: 11/01/2003
• Status: Active Grant

• Current Assignee: Ignite USA (Ignite), Olympus Corporation
• Original Assignee: Olympus Corporation, Silicon Quest Kabushiki-Kaisha
• Inventors: Endo, Taro, Maeda, Yoshihiro, Arai, Kazuma, Ishii, Fusao
• Primary Examiner(s): NGUYEN, KIMNHUNG T
• Application Number:
  US12/381,591
• Publication Number:
  US 20090201418A1
• Time in Patent Office: 1,593 Days
• Field of Search: 345 84- 89, 345/102, 345/690, 348/453, 348/771
• US Class Current: 345/84
• 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
• CPC Class Codes: H04N 9/3155 for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406
• CPC Class Codes: H04N 9/3164 using multiple light sources
• CPC Class Codes: H04N 9/3182 Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607

Abstract

A video display system includes 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 display unit for displaying a video image in accordance with the output frame signals, wherein each of the input frame signals has 2^M gray scale levels for each pixel, the image processing unit further generates the output frame signals including at least a first output frame signal having 2^N gray scale levels with N<M for each pixel and a second output frame signal having [2^M-2^N] or fewer gray scale levels for each pixel.

Claims

1. 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;

a display unit for displaying a video image in accordance with the output frame signals, wherein each of the input frame signals has 2^M gray scale levels for each pixel;

the image processing unit further generates the output frame signals including at least a first output frame signal having 2^N gray scale levels with N<

M for each pixel and a second output frame signal having [2^M-2^N] or fewer gray scale levels for each pixel wherein M and N are positive integers; and

the image processing unit further generates the first output frame signal includes a first gray scale data having a same number of gray scale levels as a second gray scale data of the second output frame signal and the first output frame signal and second output frame signal having different output frame period.

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

the image processing unit further generates the second output frame signal including gray scale data for at least two different gray scale levels.

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

the first output frame signal further comprises a frame signal for display images of a first color and the second output frame signal further comprises frame signal for displaying images of a second color.

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

the image processing unit further generates the first output frame signal includes at least two gray scale signals for two different colors with two different gray scale levels.

5. 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;

a display unit for displaying a video image in accordance with the output frame signals, wherein each of the input frame signals has 2^M gray scale levels for each pixel;

the image processing unit further generates the output frame signals including at least a first output frame signal having 2^N gray scale levels with N<

M for each pixel and a second output frame signal having [2^M-2^M] or fewer gray scale levels for each pixel wherein M and N are positive integers; and

the display unit includes an illumination optical system and a spatial light modulator (SLM) for modulating an illumination light irradiated from the illumination optical system and generating the video image in accordance with the output frame signal, wherein the difference between a first gray scale levels of the first output frame signal and a second gray scale levels of the second output frame signal is determined by the difference between the intensity of light of the illumination light irradiated during a first output frame period and the intensity of light of the illumination light irradiated during a second output frame period.

6. The video display system according to claim 5, wherein:

the illumination optical system further comprises a laser light source or light emitting diode (LED) light source.

7. The video display system according to claim 5, wherein:

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

8. 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;

a display unit for displaying a video image in accordance with the output frame signals, wherein each of the input frame signals has 2^M gray scale levels for each pixel;

the image processing unit further generates the output frame signals including at least a first out fit frame signal having 2^N gray scale levels with N<

M for each pixel and a second output frame signal having [2^M-2^N] or fewer gray scale levels for each pixel wherein M and N are positive integers; and

;

the image processing unit further generates the first output frame signal includes a first gray scale data having a same number of gray scale levels as a second gray scale data of the second output frame signal wherein said first output frame signal is applied to display image of a first color and said second output frame signal is applied to display image of a second color.

9. 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;

a display unit for displaying a video image in accordance with the output frame signals, wherein each of the input frame signals has 2^M gray scale levels for each pixel; and

the image processing unit further generates the first output frame signal includes two gray scale signals for a green color and a blue color with a gray scale levels of the green color greater than the gray scale levels of the blue color.

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 including output frame signals having a higher frame rate than the input frame signals;

a display unit for displaying a video image in accordance with the output frame signals, wherein each of the input frame signals has 2^M gray scale levels for each pixel; and

the display unit further displays the video images with a number of gray scales generated from a combination of the video image displayed in accordance with the first output frame signal and the video image displayed in accordance with the second output frame signal.