MULTI-TOUCH DETECTING APPRATUS AND METHOD FOR LCD DISPLAY APPARATUS
First Claim
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1. A multi-touch detecting apparatus comprising:
- a liquid crystal display (LCD) module which comprises an LCD panel and a backlight unit (BLU);
a plurality of infrared light sources which emits infrared light toward the LCD module;
an infrared light detecting camera which is disposed proximate a rear surface of the LCD panel and detects infrared light reflected from an object on the LCD panel; and
a control unit which turns off the BLU when the infrared light detecting camera is turned on.
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Abstract
A multi-touch detecting apparatus includes a liquid crystal display (LCD) module which includes an LCD panel and a backlight unit (BLU), a plurality of infrared light sources which emits infrared light toward the LCD module, an infrared light detecting camera which is disposed proximate a rear surface of the LCD panel, and detects infrared light reflected from an object on the LCD panel, and a control unit which turns off the BLU when the infrared light detecting camera is turned on.
110 Citations
34 Claims
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1. A multi-touch detecting apparatus comprising:
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a liquid crystal display (LCD) module which comprises an LCD panel and a backlight unit (BLU); a plurality of infrared light sources which emits infrared light toward the LCD module; an infrared light detecting camera which is disposed proximate a rear surface of the LCD panel and detects infrared light reflected from an object on the LCD panel; and a control unit which turns off the BLU when the infrared light detecting camera is turned on. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A multi-touch detecting method comprising:
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emitting infrared light from an infrared light source toward a liquid crystal display (LCD) module comprising a backlight unit (BLU); turning on an infrared light detecting camera and turning off the BLU; detecting infrared light reflected from an object on the LCD module; and turning off the infrared light detecting camera and turning on the BLU. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A multi-touch detecting apparatus comprising:
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a liquid crystal display (LCD) module comprising an LCD panel, a backlight unit (BLU) and optical sheets disposed between the LCD panel and the BLU; a transparent touch panel which is disposed proximate a front surface of the LCD panel and through which an object establishes a contact with the LCD panel; infrared light sources which emit infrared light to propagate toward the transparent touch panel, wherein a first portion of the emitted infrared light propagates along a first surface of the transparent panel and a second portion of the emitted light propagates along a second surface of the transparent panel; a camera which is disposed proximate the BLU and detects the first and second portions of the infrared light reflected from areas deformed by the object contacting the transparent touch panel; and a control unit which turns off the BLU and turns on the camera, while the camera detects the first and second portions of the infrared light. - View Dependent Claims (33, 34)
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Specification