Image signal processing apparatus and method and image...

Details Image signal processing apparatus and method and image... Image signal processing apparatus and method and image...

2007-05-15

2007-05-15

Lao, Lun-Yi (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S076000, C345S082000, C348S607000, C315S169300

Reexamination Certificate

active

10762252

ABSTRACT:
To provide a bright, high-image-quality image display apparatus, in an overlap scanning mode in which two scan-wiring lines are selected simultaneously in each horizontal scanning period, high-frequency emphasis filtering is performed on a video signal so that a gain at a spatial frequency corresponding to ½ of a vertical critical resolution is within the range of 0 dB to +6 dB. It is even preferable that a gain of this high-frequency emphasis filtering at a spatial frequency corresponding to 7/10 of the vertical critical resolution be higher than or equal to +3 dB. For example, this high-frequency emphasis filtering can be implemented by a 3-tap FIR filter having filter coefficients (h1, h2, h3)=(−x/2, 1+x, −x/2).

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