Flat panel display device having on-screen data input function
First Claim
1. A flat panel display device having a data input function, comprising:
- a display panel having a plurality of first scanning conductors, a plurality of data conductors, and an array of display elements disposed at intersections of said scanning conductors and said data conductors;
first scanning circuit means coupled to said first scanning conductors and data drive circuit means coupled to said data conductors, for driving said display elements to display data;
a plurality of second scanning conductors and a plurality of data output conductors formed on said display panel, said second scanning conductors and data output conductors being positioned to mutually intersect such that at least a first part of said intersections are disposed respectively closely adjacent to corresponding ones of said display elements;
a plurality of photo-sensing elements formed on said display panel, respectively coupled between said intersections of said second scanning conductors and data output conductors, and;
second scanning circuit means coupled to said second scanning conductors and output data processing circuit means coupled to said data output conductors, for sensing changes in electrical characteristics of said photo-sensing elements resulting from selective variation of levels of light incident thereon and interpreting said changes as input data.
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Accused Products
Abstract
An "active matrix" type of liquid crystal matrix display panel, in which diodes are employed as switching elements coupled to each liquid crystal display element, photo-sensing elements such as photo-diodes are formed upon the display panel to enable data input to the panel by variation of the electrical characteristics of the photo-sensing elements by selectively varying the level of light incident thereon. The photo-sensing elements, when composed of photo-diodes, can be formed during the same manufacturing process and in the same manufacturing steps as those in which the diode switching elements are formed, so that no appreciable increase in manufacturing cost is entailed by adding such a data input function.
142 Citations
11 Claims
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1. A flat panel display device having a data input function, comprising:
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a display panel having a plurality of first scanning conductors, a plurality of data conductors, and an array of display elements disposed at intersections of said scanning conductors and said data conductors; first scanning circuit means coupled to said first scanning conductors and data drive circuit means coupled to said data conductors, for driving said display elements to display data; a plurality of second scanning conductors and a plurality of data output conductors formed on said display panel, said second scanning conductors and data output conductors being positioned to mutually intersect such that at least a first part of said intersections are disposed respectively closely adjacent to corresponding ones of said display elements; a plurality of photo-sensing elements formed on said display panel, respectively coupled between said intersections of said second scanning conductors and data output conductors, and; second scanning circuit means coupled to said second scanning conductors and output data processing circuit means coupled to said data output conductors, for sensing changes in electrical characteristics of said photo-sensing elements resulting from selective variation of levels of light incident thereon and interpreting said changes as input data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification