Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1993-05-05
1997-05-27
Saras, Steven
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345192, 345193, G09G 522
Patent
active
056336560
ABSTRACT:
An apparatus for controlling an on-screen menu for television and display monitors. The apparatus includes a first data bus having a plurality of data lines including a least significant bit line. The first data bus transmits display information, the display information including alphanumeric data and attribute data relating to the parameters of the on-screen menu. A display buffer for storing both types of display information is coupled to the first data bus. The display buffer generates the alphanumeric data when a select signal is in a prescribed logic state, and generates the attribute data when the select signal is the complement of the prescribed logic state. A latch circuit for generating the select signal is coupled to the first data bus. By generating the select signal, the latch circuit causes the display buffer to generate the attribute data at a different time from the alphanumeric data. The latch circuit may then latch the attribute data by means of its connection to the first data bus. A read-only memory is coupled to the first data bus and generates a character signal in response to the alphanumeric data. A second data bus coupled to the read-only memory transmits the character signal to a shift register which then converts the parallel signal to a serial signal and transmits the serial signal to the display.
REFERENCES:
patent: 4384285 (1983-05-01), Long et al.
patent: 4653020 (1987-03-01), Cheselka et al.
patent: 4672371 (1987-06-01), Bugg
patent: 4831369 (1989-05-01), Lecourtier
patent: 4864518 (1989-09-01), Kurita
patent: 4922237 (1990-05-01), Inoue
Hsu Hung-Chang
Lin Chyi-Cheng
Acer Peripherals Inc.
Saras Steven
Villeneuve Joseph M.
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