Input/output display panel with light pen

Details Input/output display panel with light pen Input/output display panel with light pen

1990-04-16

1992-09-29

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340712, 359 59, 359 72, G09G 302

Patent

active

051516888

ABSTRACT:
An information input and output apparatus includes an active matrix type display device and switching device. In the information input and output apparatus, the display device displays an image according to an image signal, and has plural pixel electrodes formed in a matrix shape on a transparent substrate. The switching device drives the display device in response to a predetermined voltage to be applied to one of row electrode lines and a predetermined voltage to be applied as the image signal to one of column electrode lines. A photoconductive layer is formed between each of the row electrode lines and each of the column electrode lines at each intersection of the row electrode lines and the column electrode lines in a structure relation to receive light projected from the light pen. When light projected from a light pen is incident onto the photoconductive layer, the resistance thereof decreases. Then, a detection circuit detects a position of the light pen located on the display means responsive to a signal corresponding to the decrease of the resistance of the photoconductive layer which is induced to each of the column electrode lines.

REFERENCES:
patent: 4177354 (1979-12-01), Mathews
patent: 4679909 (1987-07-01), Hamada et al.
patent: 4841290 (1989-06-01), Nakano et al.
patent: 4952031 (1990-08-01), Tsunoda et al.

Affiliated with

Also associated with

Rating

Input/output display panel with light pen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Input/output display panel with light pen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Input/output display panel with light pen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1971270