Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2007-10-09
2007-10-09
Nguyen, Kevin M. (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S696000, C345S698000
Reexamination Certificate
active
10682010
ABSTRACT:
Apparatus for converting orthogonal data to a format suitable for displaying the image on a diamond-shaped pixel array. A stream of digital data formatted for being displayed on an orthogonal pixel array is received at an IIR (Infinite Impulse Response) filter. The digital data stream is conditioned so that it can be sub-sampled and used on a diamond-shaped pixel array with minimal distortion. The sub-sampling comprises dropping even pixels in odd numbered orthogonal rows and dropping odd pixels on all even numbered rows. A tap is included at the IIR filter for providing a partially filtered version of the data stream to circuitry for reducing “ringing” of the image. The circuitry also detects edges in the image and emphasizes vertical transitions when a vertical edge is detected and emphasizes horizontal transitions when a vertical edge is not detected.
REFERENCES:
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patent: 5280277 (1994-01-01), Hornbeck
patent: 5905817 (1999-05-01), Matama
patent: 6522356 (2003-02-01), Watanabe
patent: 6928196 (2005-08-01), Bradley et al.
Brady III Wade James
Nguyen Kevin M.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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