REDUCING SPARKLE ARTIFACTS WITH POST GAMMA CORRECTION SLEW RATE LIMITING

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 al...

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Bibliographische Detailangaben
1. Verfasser:	WILLIS, DONALD, HENRY
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Zusammenfassung:	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.