Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-06-20
2006-06-20
Lao, Lun-Yi (Department: 2677)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S098000, C345S204000
Reexamination Certificate
active
07064738
ABSTRACT:
On an interface of a liquid crystal display device, which converts the number of pixels of image signals inputted from an external signal source, such as a host computer, into image signals having a smaller number of pixels and fetches the image signs into drain drivers at double edges of a clock signal of low frequency, a clock surveillance unit is mounted, which includes a clock synthesizer and a clock comparator circuit, and which detects the presence or the absence of an irregularity in the timing of a pixel clock signal inputted from the external signal source and outputs a determination of the normal/irregular status of the pixel clock signal. When it is determined that the pixel clock signal is irregular, the supply of image data to the drain drivers from a parallel-serial converter is stopped, so that the generation of an irregularity in the display produced by the liquid crystal display device can be obviated.
REFERENCES:
patent: 5642069 (1997-06-01), Waite
patent: 5682112 (1997-10-01), Fukushima
patent: 5969558 (1999-10-01), Abe
patent: 5986641 (1999-11-01), Shimamoto
patent: 6414528 (2002-07-01), Usui
Antonelli, Terry Stout and Kraus, LLP.
Lao Lun-Yi
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