Touch screen with light-enhancing layer
First Claim
Patent Images
1. A touch indication device comprising:
- a light guide structure for passing light of a light source via total internal reflection;
a touch surface which disturbs the total internal reflection when touched, causing light to leave the light guide structure; and
a light enhancement layer for converting the light leaving the light guide and sending the converted light to a light detector wherein the light enhancement layer is comprised of phosphor and converts the color of the light leaving the light guide.
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Abstract
A touch indication device comprises a light guide structure for passing light of a light source via total internal reflection. A touch surface disturbs the total internal reflection when touched, causing light to leave the light guide structure. A light enhancement layer converts the light leaving the light guide and sends the converted light to a light detector. The light enhancement layer amplifies the intensity and/or changes the color of the light leaving the light guide. The detector determines the position of the touch on the touch surface based on the light from the light enhancement layer.
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Citations
14 Claims
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1. A touch indication device comprising:
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a light guide structure for passing light of a light source via total internal reflection; a touch surface which disturbs the total internal reflection when touched, causing light to leave the light guide structure; and a light enhancement layer for converting the light leaving the light guide and sending the converted light to a light detector wherein the light enhancement layer is comprised of phosphor and converts the color of the light leaving the light guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification