Device for enhancing contrast in liquid crystal display...

Details Device for enhancing contrast in liquid crystal display... Device for enhancing contrast in liquid crystal display...

2005-09-13

2005-09-13

Lamarre, Guy (Department: 2133)

Computer graphics processing and selective visual display system

Plural physical display element control system

Optical means interposed in viewing path

C345S048000, C345S050000

Reexamination Certificate

active

06943756

ABSTRACT:
A device for enhancing contrast for a liquid crystal display (LCD) projection system is provided. The contrast enhancing device includes an image driver supplying an image signal, a LCD panel for converting the input image signal into an optical image signal, and a contrast control portion positioned on the same optical axis as that of the LCD panel, for controlling an amount of scanned light according to the brightness of a corresponding image. Accordingly, the projection system adopting an image display device as a liquid crystal device provides a remarkably enhanced contrast enhancement effect. In particular, as the brightness of the total image is brighter, the contrast enhancement effect becomes larger.

REFERENCES:
patent: 3724938 (1973-04-01), Nepela
patent: 4635051 (1987-01-01), Bos
patent: 5048931 (1991-09-01), Magocs
patent: 5181117 (1993-01-01), Choi et al.
patent: 5231496 (1993-07-01), Takui
patent: 5303054 (1994-04-01), Chen
patent: 5597223 (1997-01-01), Watanabe et al.
patent: 5622418 (1997-04-01), DAijogo et al.
patent: 5634704 (1997-06-01), Shikama et al.
patent: 5801792 (1998-09-01), Smith et al.
patent: 5889614 (1999-03-01), Cobben et al.
patent: 5952992 (1999-09-01), Helms
patent: 6243152 (2001-06-01), Knox et al.
patent: 6327093 (2001-12-01), Nakanishi et al.
patent: 62-54226 (1987-03-01), None
patent: 63-298221 (1988-12-01), None
patent: 04199123 (1990-11-01), None
patent: 5-188345 (1993-07-01), None
patent: 7-15692 (1995-01-01), None
patent: 7-168147 (1995-07-01), None
patent: 10-73797 (1998-03-01), None
patent: 0163077 (1998-09-01), None

Affiliated with

Also associated with

Rating

Device for enhancing contrast in liquid crystal display... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for enhancing contrast in liquid crystal display..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for enhancing contrast in liquid crystal display... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3421062