Photosensitive structure, photosensitive display substrate, and fabrication and control methods of the photosensitive display substrate
First Claim
1. A photosensitive structure, comprising:
- a first conductive layer;
a second conductive layer;
a photoconductive material layer, sandwiched between the first conductive layer and the second conductive layer, wherein;
in response to a light illumination, the photoconductive material layer is capable of changing from an insulating state to a conductive state, andthe photoconductive material layer includes meshes formed by a first plurality of photoconductive material lines and a second plurality of photoconductive material lines that are crossly configured, each mesh corresponding to a pixel cell;
one or more first constant voltage sources, configured in a periphery of the first conductive layer to charge the first conductive layer in a plurality of different directions to maintain a first voltage on the first conductive layer;
a plurality of current measurement units, each disposed between the first constant voltage source and the first conductive layer and each configured to measure a charging current between the first constant voltage source and the first conductive layer, wherein the plurality of current measurement units are configured to output a plurality of current signals corresponding to the one or more first constant voltage sources; and
a touch signal determination unit, connected to the plurality of current measurement units to determine a touch position based on the plurality of current signals from the plurality of current measurement units,wherein the second conductive layer includes meshes corresponding to the meshes in the photoconductive material layer.
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Abstract
The present disclosure provides a photosensitive structure, a photosensitive display substrate, and fabrication and control methods of the photosensitive display substrate. The photosensitive structure includes a first conductive layer; a second conductive layer; and a photoconductive material layer, sandwiched there-between. In response to a light illumination, the photoconductive material layer is capable of changing from an insulating state to a conductive state. One or more first constant voltage sources are configured in a periphery of the first conductive layer to charge the first conductive layer in different directions to maintain a first voltage there-on. Each current measurement unit is disposed between one first constant voltage source and the first conductive layer and configured to measure a charging current between the first constant voltage source and the first conductive layer, and configured to output current signals corresponding to the first constant voltage sources. A touch signal determination unit is connected to the current measurement units to determine a touch position.
5 Citations
19 Claims
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1. A photosensitive structure, comprising:
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a first conductive layer; a second conductive layer; a photoconductive material layer, sandwiched between the first conductive layer and the second conductive layer, wherein; in response to a light illumination, the photoconductive material layer is capable of changing from an insulating state to a conductive state, and the photoconductive material layer includes meshes formed by a first plurality of photoconductive material lines and a second plurality of photoconductive material lines that are crossly configured, each mesh corresponding to a pixel cell; one or more first constant voltage sources, configured in a periphery of the first conductive layer to charge the first conductive layer in a plurality of different directions to maintain a first voltage on the first conductive layer; a plurality of current measurement units, each disposed between the first constant voltage source and the first conductive layer and each configured to measure a charging current between the first constant voltage source and the first conductive layer, wherein the plurality of current measurement units are configured to output a plurality of current signals corresponding to the one or more first constant voltage sources; and a touch signal determination unit, connected to the plurality of current measurement units to determine a touch position based on the plurality of current signals from the plurality of current measurement units, wherein the second conductive layer includes meshes corresponding to the meshes in the photoconductive material layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of fabricating a photosensitive display substrate, comprising:
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forming a first conductive layer over a base substrate; forming a photoconductive material layer over the first conductive layer, the photoconductive material layer including meshes formed by a first plurality of photoconductive material lines and a second plurality of photoconductive material lines that are crossly configured, each mesh corresponding to a pixel cell; forming a color filter layer in the pixel cells; forming a second conductive layer over the color filter layer and over the photoconductive material layer, the second conductive layer including meshes corresponding to the meshes in the photoconductive material layer; and forming a light-shielding layer over the second conductive layer to provide a projected area covering the first and second plurality of photoconductive material lines of the photoconductive material layer in a direction perpendicular to a surface of the base substrate.
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18. A control method in a photosensitive display device, the method comprising:
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providing the photosensitive structure including a first conductive layer having a rectangular shape with four corners A, B, C, and D, a second conductive layer, and a photoconductive material layer sandwiched by the first conductive layer and the second conductive layer; supplying power, by one or more first constant voltage sources configured in the periphery of the first conductive layer, to charge the first conductive layer in a plurality of different directions to maintain a first voltage on the first conductive layer; receiving a light illumination passing through one of the first and second conductive layers to have a light illuminated area in the photoconductive material layer; measuring a charging current between the first conductive layer and each of the one or more first constant voltage sources in response to the light illumination, by a plurality of current measurement units connected to the four corners A, B, C, and D, to output a plurality of current signals denoted as i_A, i_B, i_C, and i_D corresponding to the one or more first constant voltage sources; and determining a touch position, by a touch signal determination unit connected to the plurality of current measurement units, based over the plurality of current signals, the touch position being determined by - View Dependent Claims (19)
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Specification