Area sensor and display apparatus provided with an area sensor
First Claim
1. An area sensor comprising a sensor portion, the sensor portion comprising:
- a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer.
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Accused Products
Abstract
An area sensor of the present invention has a function of displaying an image in a sensor portion by using light-emitting elements and a reading function using photoelectric conversion devices. Therefore, an image read in the sensor portion can be displayed thereon without separately providing an electronic display on the area sensor. Furthermore, a photoelectric conversion layer of a photodiode according to the present invention is made of an amorphous silicon film and an N-type semiconductor layer and a P-type semiconductor layer are made of a polycrystalline silicon film. The amorphous silicon film is formed to be thicker than the polycrystalline silicon film. As a result, the photodiode according to the present invention can receive more light.
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Citations
48 Claims
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1. An area sensor comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer. - View Dependent Claims (5, 9, 13, 17, 21)
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2. An area sensor comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein a light emitted from the electroluminescence element is reflected from a subject to be radiated to the photodiode, the photodiode generates an image signal from the light radiated to the photodiode, the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer. - View Dependent Claims (6, 10, 14, 18, 22, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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3. An area sensor comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the plurality of thin film transistors control light emission of the electroluminescence element, a light emitted from the electroluminescence element is reflected from a subject to be radiated to the photodiode, the photodiode and the plurality of thin film transistors generate an image signal from the light radiated to the photodiode, the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer. - View Dependent Claims (7, 11, 15, 19, 23)
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4. An area sensor comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the pixel includes a photodiode, an electroluminescence element, a switching TFT, an electroluminescence driving TFT, a reset TFT, a buffer TFT and a selective TFT, the switching TFT and the electroluminescence driving TFT control light emission of the electroluminescence element, light emitted from the electroluminescence element is reflected from a subject to be radiated to the photodiode, the photodiode and the plurality of thin film transistors generate an image signal from the light radiated to the photodiode, the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer. - View Dependent Claims (8, 12, 16, 20, 24)
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25. A display apparatus comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer.
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26. A display apparatus comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein a light emitted from the electroluminescence element is reflected from a subject to be radiated to the photodiode, the photodiode generates an image signal from the light radiated to the photodiode, the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer.
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27. A display apparatus comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the plurality of thin film transistors control light emission of the electroluminescence element, a light emitted from the electroluminescence element is reflected from a subject to be radiated to the photodiode, the photodiode and the plurality of thin film transistors generate an image signal from the light radiated to the photodiode, the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer.
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28. A display apparatus comprising a sensor portion, the sensor portion comprising:
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a plurality of pixels, each of the plurality of pixels comprising a photodiode, an electroluminescence element and a plurality of thin film transistors, wherein the pixel includes a photodiode, an electroluminescence element, a switching TFT, an electroluminescence driving TFT, a reset TFT, a buffer TFT and a selective TFT, the switching TFT and the electroluminescence driving TFr control light emission of the electroluminescence element, light emitted from the electroluminescence element is reflected from a subject to be radiated to the photodiode, the photodiode and the plurality of thin film transistors generate an image signal from the light radiated to the photodiode, the photodiode includes a photoelectric conversion layer that is in contact with a part of a P-type semiconductor layer and an N-type semiconductor layer and is made of an amorphous semiconductor film and the photoelectric conversion layer is thicker than the P-type semiconductor layer and the N-type semiconductor layer.
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Specification