Electroluminescent display device
First Claim
1. An electroluminescent display device comprising:
- a display portion comprising a plurality of display electroluminescent elements disposed in a matrix;
a first light source portion comprising a plurality of light source electroluminescent elements disposed along a first side of the display portion;
a first light detecting portion comprising a plurality of detection light sensors disposed along a side opposite from the first side;
a second light source portion comprising a plurality of light source electroluminescent elements disposed along a second side of the display portion;
a second light detecting portion comprising a plurality of detection light sensors disposed along a side opposite from the second side;
a reference light sensor disposed in the first light detecting portion or the second light detecting portion; and
a comparator connected to the reference light sensor and at least two of the detection light sensors of a corresponding light detecting portion in which the reference light sensor is disposed.
1 Assignment
0 Petitions
Accused Products
Abstract
This invention provides an organic EL display device having a touch panel function and improves accuracy in positional detection on a display portion. A display panel is formed of first and second light source portions disposed along first and second sides of a display portion, and first and second light detecting portions disposed in sides opposite from the first and second sides respectively. A plurality of display pixels having organic EL elements for display is disposed in a matrix on the display portion. A plurality of organic EL elements for light sources is disposed in a row in each of the first and second light source portions. A plurality of detection light sensors and a reference light sensor are disposed in a row in each of the first and second light detecting portions. A comparator for comparing an output of each of the detection light sensors and an output of the reference light sensor is provided.
44 Citations
16 Claims
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1. An electroluminescent display device comprising:
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a display portion comprising a plurality of display electroluminescent elements disposed in a matrix;
a first light source portion comprising a plurality of light source electroluminescent elements disposed along a first side of the display portion;
a first light detecting portion comprising a plurality of detection light sensors disposed along a side opposite from the first side;
a second light source portion comprising a plurality of light source electroluminescent elements disposed along a second side of the display portion;
a second light detecting portion comprising a plurality of detection light sensors disposed along a side opposite from the second side;
a reference light sensor disposed in the first light detecting portion or the second light detecting portion; and
a comparator connected to the reference light sensor and at least two of the detection light sensors of a corresponding light detecting portion in which the reference light sensor is disposed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electroluminescent display device comprising:
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a display portion comprising a plurality of display electroluminescent elements disposed in a matrix;
a first light source portion comprising a plurality of light source electroluminescent elements disposed along a first side of the display portion;
a first light detecting portion comprising a plurality of detection light sensors disposed along a side opposite from the first side;
a second light source portion comprising a plurality of light source electroluminescent elements disposed along a second side of the display portion;
a second light detecting portion comprising a plurality of detection light sensors disposed along a side opposite from the second side;
a pair of first light reflecting boards for leading light emitted by the first light source portion to the first light detecting portion;
a pair of second light reflecting boards for leading light emitted by the second light source portion to the second light detecting portion;
a reference light sensor disposed in the first light detecting portion or the second light detecting portion; and
a comparator connected to the reference light sensor and at least two of the detection light sensors of a corresponding light detecting portion in which the reference light sensor is disposed. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification