Reducing sparkle artifacts with post gamma correction slew...

Details Reducing sparkle artifacts with post gamma correction slew... Reducing sparkle artifacts with post gamma correction slew...

2001-06-27

2009-02-24

Dharia, Prabodh M (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S089000, C345S098000

Reexamination Certificate

active

07495640

ABSTRACT:
An apparatus for reducing sparkle artifacts (10) in a liquid crystal imager includes a device (16) for gamma correcting a video drive signal for providing a gamma corrected video drive signal and a slew rate limiter (22) for slew rate limiting the gamma corrected video drive signal. The apparatus also includes a deinterlacer (12) and a color space converter (14) for color space converting a deinterlaced video drive signal, wherein the device for gamma correcting corrects the color space converted video drive signal. One or more of the video drive signals, for example R, G and B, is slew rate limited after gamma correction to limit the difference in brightness levels between adjacent pixels.

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Zhang, Yanli, “Control of Disclinations and Walls in New Types of Display Devices”, dissertation, Dec. 2005 URL: http://www.ohiolink.edu/etd/view.cgi?acc—num=kent1132453741 [Fig. 5 and Section 5.1 seem relevant.].

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