Display control apparatus using PLL

Details Display control apparatus using PLL Display control apparatus using PLL

1995-11-08

1999-08-31

Lao, Lun-Yi

Computer graphics processing and selective visual display system

Display driving control circuitry

348537, 348540, G09G 518

Patent

active

059459832

ABSTRACT:
A display control apparatus for forming dot clocks for display corresponding to a video signal from a first sync signal and executing a display control is constructed by a comparator for comparing the first sync signal and frequency division signals, a clock forming circuit for forming the dot clocks for display on the basis of a result of the comparator, a memory in which frequency division parameters of the dot clocks for display have been stored, a frequency division signal forming circuit for forming the frequency division signals from the frequency division parameters and the dot clocks for display, a counter for counting the first sync signal, and a changing circuit for changing the frequency division parameters stored in the memory in the case where a count value of the counter reaches a predetermined value.

REFERENCES:
patent: 4203076 (1980-05-01), Yamashita
patent: 4698601 (1987-10-01), Aizawa
patent: 4701795 (1987-10-01), Andrews et al.
patent: 4748510 (1988-05-01), Umezawa
patent: 4780759 (1988-10-01), Matsushima
patent: 4795239 (1989-01-01), Yamashita et al.
patent: 4962376 (1990-10-01), Inoue et al.
patent: 5019907 (1991-05-01), Murakoshi et al.
patent: 5068731 (1991-11-01), Takeuchi
patent: 5233446 (1993-08-01), Inoue et al.
patent: 5426468 (1995-06-01), Jenison

Affiliated with

Also associated with

Rating

Display control apparatus using PLL does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Display control apparatus using PLL, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display control apparatus using PLL will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2427505