Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-06-04
2000-04-18
Shalwala, Bipin
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 60, 345208, 3151692, G09G 328, G09G 336, G09C 500
Patent
active
060521058
ABSTRACT:
A wave generation circuit is disclosed, in which a complex waveform can be generated without increasing the ROM data amount or increasing the reading rate. Waveform data relating to a waveform and the generation thereof are stored in a ROM for each cycle. An address signal for reading the waveform data sequentially is produced sequentially by an address generation circuit. The waveform data read out are sequentially reproduced into a waveform signal by a waveform data output circuit. In a wave generating circuit including the ROM and the address generation circuit, the waveform data includes the extension information instructing to extend and reproduce the waveform data for a particular cycle. An extension and control circuit included in the wave generation circuit decides on the presence or absence of the extension information from the read waveform data, and in the presence of the extension information, controls the waveform data output circuit to maintain the output of a corresponding waveform signal while at the same time controlling the address generation circuit to retard the generation of the address signal. The wave generation circuit can generate a single waveform data in an extended form according to the extension information when the same data continues for a plurality of cycles, thereby reducing the waveform data amount and the ROM capacity.
REFERENCES:
patent: 3851211 (1974-11-01), Greeson, Jr.
patent: 3936808 (1976-02-01), O'Neill, Jr.
patent: 4499460 (1985-02-01), Person et al.
patent: 4727570 (1988-02-01), Tarbouriech
patent: 4819186 (1989-04-01), Ohta et al.
patent: 5068651 (1991-11-01), Takebe et al.
patent: 5670993 (1997-09-01), Greene et al.
patent: 5680600 (1997-10-01), Childers et al.
Ishida Katsuhiro
Kanazawa Yoshikazu
Kuriyama Hirohito
Tajima Masaya
Ueda Toshio
Fujitsu Limited
Lewis David L.
Shalwala Bipin
LandOfFree
Wave generation circuit for reading ROM data and generating wave does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wave generation circuit for reading ROM data and generating wave, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wave generation circuit for reading ROM data and generating wave will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2339774