Image input-output device with color layer between photodetector and display elements to improve the accuracy of reading images in color
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsJun Koyama, Shunpei Yamazaki
Life of this patent
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Abstract
An image input-output device includes a pixel which displays an image and reads an image. The pixel includes a photodetector element, a color layer, and a display element. The color layer is provided over the photodetector element and the display element is provided over the color layer, so that the distance between the photodetector element and the color layer is reduced. Accordingly, light is likely to enter the predetermined photodetector element through the predetermined color layer, and thus, even a color object can be read correctly.
Claims21
An image input-output device comprising:
- a substrate;
- and
- a pixel which is provided over the substrate, and configured to display an image and configured to read an image,
- wherein the pixel includes:
- a first transistor and a second transistor;
- a photodetector element having an anode and a cathode, one of which is electrically connected to a gate electrode of the second transistor;
- a first protective film provided over the first transistor, the second transistor, and the photodetector element;
- a color layer and a light blocking layer provided over and in contact with a top surface of the first protective film, a top surface of the color layer being aligned with a top surface of the light blocking layer;
- a second protective film provided over and in contact with a top surface of the color layer and a top surface of the light blocking layer;
- and
- a liquid crystal element provided over the second protective film, and
- wherein the liquid crystal element includes:
- a first electrode provided over and in contact with a top surface of the second protective film;
- a second electrode;
- and
- a liquid crystal layer to which a voltage is configured to be applied by the first electrode and the second electrode.
An image input-output device comprising:
- a substrate;
- and
- a pixel which is provided over the substrate, and configured to display an image and configured to read an image,
- wherein the pixel includes:
- a first transistor and a second transistor;
- a photodetector element having an anode and a cathode, one of which is electrically connected to a gate electrode of the second transistor;
- a first protective film provided over the first transistor, the second transistor, and the photodetector element;
- a color layer and a light blocking layer having a tapered cross section provided over and in contact with a top surface of the first protective film, a top surface of the color layer being aligned with a top surface of the light blocking layer;
- a second protective film provided over and in contact with a top surface of the color layer and a top surface of the light blocking layer;
- and
- a liquid crystal element provided over the second protective film, and
- wherein the liquid crystal element includes:
- a first electrode provided over and in contact with a top surface of the second protective film;
- a second electrode;
- and
- a liquid crystal layer to which a voltage is configured to be applied by the first electrode and the second electrode.
Dependencies are inferred from the claim text.