Touch input system using light guides
First Claim
Patent Images
1. A touch input system comprising:
- a light-emitting device that emits light;
a bent light guide that receives the light emitted by the light-emitting device and guides the light to travel in a direction across a face of a display screen; and
, a light detector that detects the light.
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Abstract
A touch input system includes a light-emitting device, a bent light guide and a light detector. The light-emitting device emits light. The bent light guide receives the light emitted by the light-emitting device and guides the light to travel in a direction across a face of a display screen. The light detector detects the light.
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Citations
20 Claims
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1. A touch input system comprising:
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a light-emitting device that emits light;
a bent light guide that receives the light emitted by the light-emitting device and guides the light to travel in a direction across a face of a display screen; and
,a light detector that detects the light. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A touch input system comprising:
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a display screen;
at least one light emitter situated along a first edge of the display screen and along a second edge of the display screen;
at least one photo detector; and
,at least one bent light guide located along a third edge of the display screen and along a fourth edge of the display screen, wherein the third edge of the display is opposite the first edge of the display, and wherein the fourth edge of the display is opposite the second edge of the display;
wherein the at least one bent light guide guides light originating from the at least one light emitter across the display screen to the at least one photo detector. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for providing touch input to a device, the method comprising:
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emitting light from a light-emitting device;
using a bent light guide to change direction of light emitted from the light-emitting device so that the light travels in a direction across a face of a display screen; and
,detecting the light with a light detector. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification