Computer graphics processing and selective visual display system – Display peripheral interface input device – Stylus
Patent
1995-08-04
1999-07-13
Mengistu, Amare
Computer graphics processing and selective visual display system
Display peripheral interface input device
Stylus
345173, G09G 500
Patent
active
059233206
ABSTRACT:
Disclosed is a liquid-crystal display having the capability of a tablet which offers high image quality and a high response speed. An active matrix type liquid-crystal display having the capability of a tablet comprises: an active matrix type liquid-crystal display composed of a device substrate having a plurality of scan electrodes, a plurality of data electrodes, a plurality of pixel electrodes, and a plurality of switching devices, and an opposed substrate holding a liquid crystal in cooperation with the device substrate; a voltage detector that when brought into contact with a display surface of the liquid-crystal display, detects pulses, which are applied consecutively to the scan electrodes and data electrodes, through electrostatic coupling between the detector and the scan electrodes or between the detector and the data electrodes and that outputs a detected signal; and a position detector for detecting a contact position of the detector on the basis of the detected signal. Herein, the device substrate is situated on the side of the observer of the display. The positions of data electrodes lying in the vicinity of a stylus are detected during a data electrode position detection period defined as a period during which no pulses are applied to scan electrodes. Positions of scan electrodes lying in the vicinity of the stylus are identified by detecting display scanning pulses that are applied consecutively to a plurality of scan electrodes in order to cause the switching devices to conduct consecutively during a display data writing period.
REFERENCES:
patent: 5192826 (1993-03-01), Aoki
patent: 5241308 (1993-08-01), Young
patent: 5283556 (1994-02-01), Ise
patent: 5392058 (1995-02-01), Tagawa
patent: 5442373 (1995-08-01), Nomura et al.
patent: 5491706 (1996-02-01), Tagawa et al.
patent: 5506375 (1996-04-01), Kikuchi
patent: 5534892 (1996-07-01), Tagawa
patent: 5552568 (1996-09-01), Onodaka et al.
Itokazu Masafumi
Murakami Hiroshi
Nakabayashi Ken-ichi
Oda Masami
Oura Michiya
Fujitsu Limited
Mengistu Amare
Osorio Ricardo
LandOfFree
Liquid-crystal display having the capability of a tablet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid-crystal display having the capability of a tablet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid-crystal display having the capability of a tablet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2280362