OPTICAL TOUCH APPARATUS AND OPERATING METHOD THEREOF
First Claim
1. An optical touch apparatus, comprising:
- a light emitting module, set at a first side of a surface of the optical touch apparatus, for emitting at least one sensing beam comprising a plurality of sensing rays;
a light sensing module, set at a second side different from the first side on the surface, the light sensing module comprising a plurality of light sensors;
a noise suppressing module, set at the second side and in front of the plurality of light sensors of the light sensing module, if an emitting angle of a specific sensing ray among the plurality of sensing rays toward a light sensor of the plurality of light sensors is larger than a default value, the specific sensing ray being considered as noise and the noise suppressing module blocking the specific sensing ray from emitting into the light sensor; and
a processing module, coupled to the light sensing module, after the light sensing module generates a sensing result according to the condition of the light sensing module receiving the at least one sensing beam, the processing module determining the position of a touch point according to the sensing result.
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Abstract
An optical touch apparatus is disclosed. The optical touch apparatus comprises a light emitting module, a noise suppressing module, a light sensing module, and a processing module. The light emitting module emits at least one sensing beam, and the at least one sensing beam comprises a plurality of sensing rays. If an emitting angle of a specific sensing ray among the plurality of sensing rays toward a light sensor of the light sensing module is larger than a default value, the noise suppressing module will block the specific sensing ray from emitting into the light sensor. After the light sensing module generates a sensing result according to the condition of the light sensing module receiving the at least one sensing beam, the processing module will determine the position of a touch point according to the sensing result.
30 Citations
28 Claims
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1. An optical touch apparatus, comprising:
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a light emitting module, set at a first side of a surface of the optical touch apparatus, for emitting at least one sensing beam comprising a plurality of sensing rays; a light sensing module, set at a second side different from the first side on the surface, the light sensing module comprising a plurality of light sensors; a noise suppressing module, set at the second side and in front of the plurality of light sensors of the light sensing module, if an emitting angle of a specific sensing ray among the plurality of sensing rays toward a light sensor of the plurality of light sensors is larger than a default value, the specific sensing ray being considered as noise and the noise suppressing module blocking the specific sensing ray from emitting into the light sensor; and a processing module, coupled to the light sensing module, after the light sensing module generates a sensing result according to the condition of the light sensing module receiving the at least one sensing beam, the processing module determining the position of a touch point according to the sensing result. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An optical touch apparatus, comprising:
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a light emitting module, set at a first side of a surface of the optical touch apparatus, for emitting at least one sensing beam comprising a plurality of sensing rays; a light sensing module, set at a second side different from the first side on the surface; a noise suppressing module, set at the first side and in front of a plurality of light emitters of the light emitting module, if an emitting angle of a specific sensing ray among the plurality of sensing rays toward the light sensing module is larger than a default value, the specific sensing ray being considered as noise and the noise suppressing module blocking the specific sensing ray from emitting into the light sensor; and a processing module, coupled to the light sensing module, after the light sensing module generates a sensing result according to the condition of the light sensing module receiving the at least one sensing beam, the processing module determining the position of a touch point according to the sensing result. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of operating an optical touch apparatus, the optical touch apparatus comprising a light emitting module, a light sensing module, a noise suppressing module, and a processing module, the light emitting module and the light sensing module being set at a first side and a second side of a surface of the optical touch apparatus respectively, the noise suppressing module being set at the second side and in front of a plurality of light sensors of the light sensing module, the method comprising the steps of:
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the light emitting module emitting at least one sensing beam comprising a plurality of sensing rays; if an emitting angle of a specific sensing ray among the plurality of sensing rays toward a light sensor of the plurality of light sensors is larger than a default value, the specific sensing ray being considered as noise and the noise suppressing module blocking the specific sensing ray from emitting into the light sensor; the light sensing module generating a sensing result according to the condition of the light sensing module receiving the at least one sensing beam; and the processing module determining the position of a touch point according to the sensing result. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of operating an optical touch apparatus, the optical touch apparatus comprising a light emitting module, a light sensing module, a noise suppressing module, and a processing module, the light emitting module and the light sensing module being set at a first side and a second side of a surface of the optical touch apparatus respectively, the noise suppressing module being set at the first side and in front of a plurality of light emitters of the light emitting module, the method comprising the steps of:
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the light emitting module emitting at least one sensing beam comprising a plurality of sensing rays; if an emitting angle of a specific sensing ray among the plurality of sensing rays toward the light sensing module is larger than a default value, the specific sensing ray being considered as noise and the noise suppressing module blocking the specific sensing ray from emitting into the light sensor; the light sensing module generating a sensing result according to the condition of the light sensing module receiving the at least one sensing beam; and the processing module determining the position of a touch point according to the sensing result. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification