DISPLAY DEVICE WITH LOCATION DETECTION FUNCTION AND INPUT LOCATION DETECTION SYSTEM
First Claim
1. A display device that has a position detection function capable of detecting light that is output from an input pointer and thereby detects an input position by the input pointer, comprising:
- a plurality of optical sensor elements disposed in a matrix so as to correspond to an image display surface of the display device;
a plane coordinate detecting unit that detects positions on an array of the respective optical sensor elements disposed in a matrix where an input from the input pointer was received;
a received light intensity detecting unit that detects intensities of light received by the optical sensor elements;
a coordinate and intensity combining unit that derives intensities of the received light at respective coordinate positions by combining the positions on a coordinate plane where the input was received, which were obtained by the plane coordinate detecting unit, and the intensities of light received on the coordinate plane, which were obtained by the received light intensity detecting unit; and
an input position detecting unit that detects an input position of the input pointer three-dimensionally by calculating a distance of the input pointer from the image display surface based on information of the received light intensities obtained by the coordinate and intensity combining unit.
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Accused Products
Abstract
An input position detection system (1) according to the present invention includes a laser pointer (50) that emits infrared light, and a liquid crystal display device (10) that detects a position of an input from the input pointer (50) by detecting the infrared light. The liquid crystal display device (10) includes optical sensor elements (30), a received light intensity calculation circuit (31), a coordinate extracting circuit (32), a combining and calculating circuit (33), an input signal calculation circuit (35), and the like. The combining and calculating circuit (33) calculates the intensities of received light at respective coordinate positions on the basis of the information obtained by the coordinate extracting circuit (32) and the received light intensity calculation circuit (31). The input signal calculation circuit (35) calculates a distance of the laser pointer (50) from an image display surface, and detects the three-dimensional position of the laser pointer on the basis of the received light intensity information. The input position detection system thus handles three-dimensional pointing with a higher degree of accuracy.
22 Citations
12 Claims
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1. A display device that has a position detection function capable of detecting light that is output from an input pointer and thereby detects an input position by the input pointer, comprising:
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a plurality of optical sensor elements disposed in a matrix so as to correspond to an image display surface of the display device; a plane coordinate detecting unit that detects positions on an array of the respective optical sensor elements disposed in a matrix where an input from the input pointer was received; a received light intensity detecting unit that detects intensities of light received by the optical sensor elements; a coordinate and intensity combining unit that derives intensities of the received light at respective coordinate positions by combining the positions on a coordinate plane where the input was received, which were obtained by the plane coordinate detecting unit, and the intensities of light received on the coordinate plane, which were obtained by the received light intensity detecting unit; and an input position detecting unit that detects an input position of the input pointer three-dimensionally by calculating a distance of the input pointer from the image display surface based on information of the received light intensities obtained by the coordinate and intensity combining unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification