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TOUCH SENSING SYSTEM AND DISPLAY APPARATUS EMPLOYING THE SAME

  • US 20100231532A1
  • Filed: 09/02/2009
  • Published: 09/16/2010
  • Est. Priority Date: 03/12/2009
  • Status: Active Grant
First Claim
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1. A touch sensing system which senses a touch position on a screen, comprising:

  • a light source that emits light;

    a light deflection unit that deflects the light emitted from the light source;

    a light guide plate which is arranged opposite to the screen and which guides the light deflected by the light deflection unit to different positions on the screen according to an incident position of the deflected light;

    a light detector that receives at least part of the guided light that is reflected from the touch position on the screen; and

    a controller that calculates the touch position on the screen based on a point of time when the light detector detects the light.

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