Light-sensing apparatuses, methods of driving the light-sensing apparatuses, and optical touch screen apparatuses including the light-sensing apparatuses
First Claim
1. A light-sensing apparatus, comprising:
- a light-sensing pixel array including a plurality of light-sensing pixels in a plurality of rows and a plurality of columns, each of the light-sensing pixels including a light sensor transistor configured to sense light and a switch transistor configured to output a light-sensing signal from a source of the light sensor transistor; and
a plurality of gate lines configured to apply a gate voltage to the light-sensing pixels, a gate of the light sensor transistor in a first row of the plurality of rows being connected directly to a gate line in a second row of the plurality of rows, wherein the switch transistor and the light sensor transistor are connected in series, and a drain of the light sensing transistor is connected to a driving voltage line.
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Accused Products
Abstract
A light-sensing apparatus in which a light sensor transistor in a light-sensing pixel is formed of an oxide semiconductor transistor for sensing light, a method of driving the light-sensing apparatus, and an optical touch screen apparatus including the light-sensing apparatus. The light-sensing apparatus includes a light-sensing pixel array having a plurality of light-sensing pixels arranged in rows and columns, and a plurality of gate lines which are arranged in a row direction and respectively provide a gate voltage to the light-sensing pixel. Each of the light-sensing pixels includes a light sensor transistor for sensing light and a switch transistor for outputting a light-sensing signal from the light sensor transistor, and gates of the light sensor transistors of the light-sensing pixels arranged in an arbitrary row are connected to a gate line arranged in a row previous or next to the arbitrary row.
18 Citations
29 Claims
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1. A light-sensing apparatus, comprising:
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a light-sensing pixel array including a plurality of light-sensing pixels in a plurality of rows and a plurality of columns, each of the light-sensing pixels including a light sensor transistor configured to sense light and a switch transistor configured to output a light-sensing signal from a source of the light sensor transistor; and a plurality of gate lines configured to apply a gate voltage to the light-sensing pixels, a gate of the light sensor transistor in a first row of the plurality of rows being connected directly to a gate line in a second row of the plurality of rows, wherein the switch transistor and the light sensor transistor are connected in series, and a drain of the light sensing transistor is connected to a driving voltage line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optical touch screen apparatus, comprising:
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a pixel array including a plurality of display pixels in a plurality of rows and columns, each of the display pixels including a display cell and a first switch transistor configured to turn the display cell ON or OFF, and at least one light-sensing pixel in the plurality of rows and the plurality of columns, the light-sensing pixel including a light sensor transistor configured to sense light and a second switch transistor configured to output a light-sensing signal from a source of the light sensor transistor; and a plurality of gate lines extending in a row direction and configured to apply a gate voltage to the display pixels and the light-sensing pixel, a gate of the light sensor transistor in a first row of the plurality of rows being connected directly to a gate line in a second row of the plurality of rows, wherein the second switch transistor and the light sensor transistor are connected in series, and a drain of the light sensor transistor is connected to a driving voltage line. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An optical touch screen apparatus, comprising:
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a pixel array including a plurality of display pixels in a plurality of rows and columns, each of the display pixels including a display cell and a first switch transistor configured to turn the display cell ON or OFF, and at least one light-sensing pixel in the plurality of rows and the plurality of columns, the light-sensing pixel including a light sensor transistor configured to sense light, and second and third switch transistors each configured to output a light-sensing signal from a source of the light sensor transistor; and a plurality of gate lines extending in a row direction and configured to apply a gate voltage to the display pixels and the light-sensing pixel, a gate of the light sensor transistor in a first row of the plurality of rows being connected directly, to a gate line in a second row of the plurality of rows, wherein the second switch transistor and the third switch transistor are each connected in series with the light sensor transistor, and a drain of the light sensor transistor is connected to a driving voltage line. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification