TOUCH SCREEN LIQUID CRYSTAL DISPLAY
First Claim
1. An integrated liquid crystal display touch screen comprising:
- a first polarizer;
a second polarizer;
a first substrate having display control circuitry formed thereon, the first substrate being disposed between the first polarizer and the second polarizer;
a second substrate disposed between the first polarizer and the second polarizer and adjacent the first substrate; and
at least one touch sensing element disposed between the first polarizer and the second polarizer and not between the first and second substrates.
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Accused Products
Abstract
Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate. Alternatively, some touch sensing elements can be between the color filter and array plates with other touch sensing elements not between the plates. In another alternative, all touch sensing elements can be between the color filter and array plates. The latter alternative can include both conventional and in-plane-switching (IPS) LCDs. In some forms, one or more display structures can also have a touch sensing function. Techniques for manufacturing and operating such displays, as well as various devices embodying such displays are also disclosed.
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Citations
44 Claims
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1. An integrated liquid crystal display touch screen comprising:
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a first polarizer;
a second polarizer;
a first substrate having display control circuitry formed thereon, the first substrate being disposed between the first polarizer and the second polarizer;
a second substrate disposed between the first polarizer and the second polarizer and adjacent the first substrate; and
at least one touch sensing element disposed between the first polarizer and the second polarizer and not between the first and second substrates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electronic device incorporating an integrated liquid crystal display touch screen, wherein the liquid crystal display touch screen comprises:
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a first polarizer;
a second polarizer;
a first substrate having display control circuitry formed thereon, the first substrate being disposed between the first polarizer and the second polarizer;
a second substrate disposed between the first polarizer and the second polarizer and adjacent the first substrate; and
at least one touch sensing element disposed between the first polarizer and the second polarizer and not between the first and second substrates. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A mobile telephone incorporating an integrated liquid crystal display touch screen, wherein the liquid crystal display touch screen comprises:
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a first polarizer;
a second polarizer;
a first substrate having display control circuitry formed thereon, the first substrate being disposed between the first polarizer and the second polarizer;
a second substrate disposed between the first polarizer and the second polarizer and adjacent the first substrate; and
at least one touch sensing element disposed between the first polarizer and the second polarizer and not between the first and second substrates. - View Dependent Claims (34, 35, 36, 37, 38)
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39. A method of fabricating an integrated liquid crystal display touch screen comprising:
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patterning a first ITO layer on a top glass of a liquid crystal display;
placing a dielectric layer on the first ITO layer; and
patterning a second ITO layer on the dielectric layer. - View Dependent Claims (40, 41, 42, 43)
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44. A method of fabricating an integrated liquid crystal display touch screen comprising:
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patterning a plurality of touch sensing electrodes on a top glass of a liquid crystal display; and
patterning a plurality of thin film transistors on the top glass, wherein the thin film transistors are configured as input and output transistors for the touch sensing electrodes.
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Specification