Optical position detecting device and display device with position detecting function
First Claim
1. An optical position detecting device comprising:
- a plurality of detection light source sections which emits a detection light;
a light source driving section that turns on a part of the plurality of detection light source sections in a first period and that turns on the other part thereof in a second period;
a first light detector that has a first sensitivity peak in a first wavelength band and that detects the detection light reflected by an object so as to provide first detection light intensity;
a second light detector that has a second sensitivity peak in a second wavelength band that is different from the first wavelength band and that detects the detection light reflected by the object so as to provide second detection light intensity; and
a position detecting section that detects a position of the object based on the first detection light intensity and the second detection light intensity in the first and second periods.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical position detecting device includes: a plurality of detection light source sections which emits a detection light; a light source driving section which turns on a part of the plurality of detection light source sections in a first period, and turns on the other part thereof in a second period; a first light detecting section which detects the detection light reflected by a object; a second light detecting section which has a sensitivity peak in a wavelength band which is different from that of the first light detecting section and detects the detection light reflected by the object; and a position detecting section which detects the position of the object on the basis of the intensity of the detection light in the first light detecting section and the intensity of the detection light in the second light detecting section in the first and second periods.
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Citations
8 Claims
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1. An optical position detecting device comprising:
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a plurality of detection light source sections which emits a detection light; a light source driving section that turns on a part of the plurality of detection light source sections in a first period and that turns on the other part thereof in a second period; a first light detector that has a first sensitivity peak in a first wavelength band and that detects the detection light reflected by an object so as to provide first detection light intensity; a second light detector that has a second sensitivity peak in a second wavelength band that is different from the first wavelength band and that detects the detection light reflected by the object so as to provide second detection light intensity; and a position detecting section that detects a position of the object based on the first detection light intensity and the second detection light intensity in the first and second periods. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification