Appeal No. 97-1656 Page 2
Application No. 08/314,26
BACKGROUND
The invention relates to an on-screen display (“OSD”) for
a television (“TV”). (Appeal Br. at 2.) The OSD
simultaneously displays channel or volume data along with
teletext data on a cathode ray tube. (Spec. at 2.) In one
embodiment of the invention, a single chip microprocessor
incorporates plural OSD devices, which are independently
controlled. In an alternate embodiment, a single chip
microprocessor employs a single OSD and controls priorities,
interrupts, and masks for the display. (Spec. at 24.)
Claim 1, which is representative for our purposes,
follows:
1. A single chip microcomputer having at least one
built-in on screen display device for simultaneously
displaying on a display a plurality of display tasks which are
processed asynchronously, comprising:
a plurality of on screen display devices each capable of
displaying in plural blocks of display data, information from
independent sources;
controlling means for independently controlling said on
screen display devices; and
mixing means for mixing output signals from said on
screen display devices, with each other.
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