Method of Detecting Touch Position, Touch Position Detecting Apparatus for Performing the Method and Display Apparatus Having the Touch Position Detecting Apparatus
First Claim
1. A method of detecting a touch position on a touch-sensitive panel, the method comprising:
- emitting light from each of a plurality of light emitting parts respectively disposed at corners of a light waveguide having a rectangular plate shape, wherein each of the plurality of light emitting parts emits light once in a period;
receiving a quantity of light by light receiving parts disposed along first and second side surfaces of the light waveguide, the second side surface facing the first side surface, wherein the quantity of light received depends upon the presence of a touch; and
detecting a position of the touch based on the quantity of the light received in the light receiving parts.
2 Assignments
0 Petitions
Accused Products
Abstract
A light waveguide has a rectangular plate shape and is configured to totally reflect internal light arriving at an angle greater than a critical angle. Light emitting parts are disposed at corners of the light waveguide. Each of the light emitting parts emits light once in a period. A first light receiving part is disposed along a first side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to a second side surface facing the first side surface of the light waveguide. The second light receiving part is disposed along the second side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to the first side surface. A detecting part detects a touch position based on an amount of the light received by the first and second light receiving parts.
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Citations
20 Claims
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1. A method of detecting a touch position on a touch-sensitive panel, the method comprising:
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emitting light from each of a plurality of light emitting parts respectively disposed at corners of a light waveguide having a rectangular plate shape, wherein each of the plurality of light emitting parts emits light once in a period; receiving a quantity of light by light receiving parts disposed along first and second side surfaces of the light waveguide, the second side surface facing the first side surface, wherein the quantity of light received depends upon the presence of a touch; and detecting a position of the touch based on the quantity of the light received in the light receiving parts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A touch position detecting apparatus comprising:
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a light waveguide having a rectangular plate shape and having an index of refraction greater than an index of refraction of air; a plurality of light emitting parts respectively disposed at corners of the light waveguide, wherein each of the plurality of light emitting parts emits light once in a period; a first light receiving part disposed along a first side surface of the light waveguide, and receiving a quantity of light emitted from the light emitting parts adjacent to a second side surface of the light waveguide wherein the quantity of light received depends upon the presence of a touch, the second side surface facing the first side surface; a second light receiving part disposed along the second side surface of the light waveguide, and receiving a quantity light emitted from the light emitting parts adjacent to the first side surface of the light waveguide, wherein the quantity of light received depends upon the presence of a touch; and a detecting part detecting a position of the touch based on the quantity of the light received by the first and second light receiving parts. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A display apparatus comprising:
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a light waveguide having a rectangular plate shape and having an index of refraction greater than an index of refraction of air; a plurality of light emitting parts respectively disposed at corners of the light waveguide, wherein each of the plurality of light emitting parts emits light once in a period; a first light receiving part disposed along a first side surface of the light waveguide, and receiving a quantity of light emitted from the light emitting parts adjacent to a second side surface of the light waveguide wherein the quantity of light received depends upon the presence of a touch, the second side surface facing the first side surface; a second light receiving part disposed along the second side surface of the light waveguide, and receiving a quantity of light emitted from the light emitting parts adjacent to the first side surface of the light waveguide, wherein the quantity of light received depends upon the presence of a touch; a detecting part detecting a position of the touch based on the quantity of light received by the first and second light receiving parts; a thin-film transistor (TFT) substrate disposed under the light waveguide to receive an image signal according to the touch position; and a liquid crystal layer formed between the light waveguide and the TFT substrate. - View Dependent Claims (18, 19, 20)
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Specification