Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1995-08-31
1998-11-17
Nguyen, Chanh
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345131, G09G 500
Patent
active
058382968
ABSTRACT:
Video magnification apparatus modifies (shrinks or enlarges) video graphic images in a horizontal and vertical direction during a transfer of video graphics data signals from a graphics memory to a television screen. A first magnification modifying device modifies the magnification of a graphic by a vertical magnification factor by generating graphic line address output signals that selectively prevent a transmission of predetermined horizontal lines of the graphic upon the reception of a vertical magnification factor that is less than unity. The first device also causes a transmission of predetermined horizontal lines of the graphic to be selectively repeated upon the reception of a vertical magnification factor that is greater than unity. A second magnification modifying device is responsive to the transmissions of the horizontal lines of the graphic indicated for transmission by the output signals of the first magnification modifying means for modifying the magnification of the graphic in a horizontal direction by a horizontal magnification factor. The second magnification modifying device selects N predetermined pixels of each received X pixel group that are multiplexed into a transmitting X pixel group for transmission in each output signal of the apparatus for a magnification factor equal to or less than unity. Still further, the second device repeats pixels of each received X pixel group a number of times corresponding to an integer magnification factor that is greater than unity for transmission in each output signal of the apparatus.
REFERENCES:
patent: 4420770 (1983-12-01), Rahman
patent: 4580165 (1986-04-01), Patton et al.
patent: 4737772 (1988-04-01), Nishi et al.
patent: 4754270 (1988-06-01), Murauchi
patent: 4757384 (1988-07-01), Nonweiler et al.
patent: 4791491 (1988-12-01), Minowa
patent: 4876600 (1989-10-01), Pietzsch et al.
patent: 4893258 (1990-01-01), Sakuragi
patent: 4907284 (1990-03-01), Ohuchi
patent: 4951038 (1990-08-01), Yamamura
patent: 4965670 (1990-10-01), Klinefelter
patent: 5027212 (1991-06-01), Marlton
patent: 5056143 (1991-10-01), Greaves et al.
patent: 5065231 (1991-11-01), Greaves et al.
patent: 5179642 (1993-01-01), Komatsu
patent: 5185597 (1993-02-01), Pappas et al.
patent: 5235677 (1993-08-01), Needle et al.
patent: 5258826 (1993-11-01), Wakeland et al.
patent: 5258843 (1993-11-01), Truong
patent: 5313231 (1994-05-01), Yin et al.
patent: 5323173 (1994-06-01), Sakuma et al.
patent: 5355175 (1994-10-01), Okada et al.
patent: 5357286 (1994-10-01), Hwang
patent: 5389947 (1995-02-01), Wood et al.
patent: 5396298 (1995-03-01), Hosokawa et al.
Amano Richard S.
Butler Donald S.
General Instrument Corporation
Nguyen Chanh
LandOfFree
Apparatus for changing the magnification of video graphics prior does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for changing the magnification of video graphics prior, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for changing the magnification of video graphics prior will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-888682