Display with infrared backlight source and multi-touch sensing function
First Claim
1. A touch-sensing display screen comprising:
- an upper transparent substrate;
a lower transparent substrate opposite the upper transparent substrate;
a backlight unit having an infrared light source configured to radiate infrared light through the upper transparent substrate in a first direction;
a transparent window disposed in alignment with the infrared light source and between the upper and lower transparent substrates;
a portion of the infrared light radiated in the first direction being reflected back through the upper transparent substrate and through the transparent window in a second direction by an object touching a surface of the upper transparent substrate;
a pixel area on the lower transparent substrate having a pixel thin-film transistor configured to activate a pixel electrode; and
an infrared light-sensing thin-film transistor in the pixel area configured to sense the infrared light received through the upper transparent substrate and the transparent window in the second direction, and output an infrared light-sense signal in response thereto,wherein the infrared light-sensing thin-film transistor has a source electrode connected with a first driving voltage supply line supplying a first voltage, a gate electrode connected with a second driving voltage supply line supplying a second voltage different from the first voltage, and a drain electrode.
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Accused Products
Abstract
A touch-sensing display screen includes an upper transparent substrate, a lower substrate opposite the upper substrate, and a backlight unit having an infrared light source configured to radiate infrared light through the upper substrate in a first direction. A transparent window is disposed in alignment with the infrared light source and between the upper and lower transparent substrates. A portion of the infrared light radiated in the first direction is reflected back through the upper substrate and through the transparent window in a second direction by an object touching a surface of the upper transparent substrate. A pixel thin-film transistor on the lower substrate is configured to activate a pixel electrode, and an infrared light-sensing thin-film transistor is configured to sense the infrared light received through the upper substrate in the second direction, and output an infrared light-sense signal in response thereto.
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Citations
21 Claims
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1. A touch-sensing display screen comprising:
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an upper transparent substrate; a lower transparent substrate opposite the upper transparent substrate; a backlight unit having an infrared light source configured to radiate infrared light through the upper transparent substrate in a first direction; a transparent window disposed in alignment with the infrared light source and between the upper and lower transparent substrates; a portion of the infrared light radiated in the first direction being reflected back through the upper transparent substrate and through the transparent window in a second direction by an object touching a surface of the upper transparent substrate; a pixel area on the lower transparent substrate having a pixel thin-film transistor configured to activate a pixel electrode; and an infrared light-sensing thin-film transistor in the pixel area configured to sense the infrared light received through the upper transparent substrate and the transparent window in the second direction, and output an infrared light-sense signal in response thereto, wherein the infrared light-sensing thin-film transistor has a source electrode connected with a first driving voltage supply line supplying a first voltage, a gate electrode connected with a second driving voltage supply line supplying a second voltage different from the first voltage, and a drain electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A display having a multi-touch sensing function, comprising:
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a display panel including a transparent window which transmits an infrared light, which is reflected from an opaque object, and a plurality of infrared ray sensors which sense the infrared light, which is incident via the transparent window; and a backlight unit radiating the infrared light to the display panel, wherein the display panel includes; a first transparent substrate where the transparent window is formed; a second transparent substrate where the infrared ray sensors are formed; and a liquid crystal layer which is formed between the first transparent substrate and the second transparent substrate, and wherein the second transparent substrate includes; a plurality of data lines to which a data voltage is supplied; a plurality of gate lines which are arranged to cross the data lines and to be sequentially supplied with a scanning pulse; a plurality of read-out lines arranged parallel to the data lines and configured to output an infrared ray sensing signal corresponding to the infrared light, which is reflected from the opaque object; a pixel electrode formed at a pixel area, the pixel area defined by the data line, the gate line, and the read-out line; a plurality of first thin film transistors formed at a crossing part of the gate lines to supply the data voltage to the pixel electrode in response to the scanning pulse; a plurality of first driving voltage supplying lines arranged parallel to the gate lines to supply a high-level driving voltage to a source electrode of the infrared ray sensor; a plurality of second driving voltage supplying lines arranged parallel to the gate lines and the first driving voltage lines, to supply a low-level driving voltage to a gate electrode of the infrared ray sensor. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification