Optical touch device and related image detecting component and locating method
First Claim
1. A locating method applied to an optical touch device, the optical touch device comprising at least one image detecting component for detecting an imaging position of an object and generating a touch position of the object on a plane according to the imaging position, the at least one image detecting component comprising a plurality of pixels, the locating method comprising:
- dividing the plurality of pixels into a first group and a second group along a first direction;
analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is simultaneously detected by the first group and the second group, wherein a first algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the first group, and a second algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the second group;
utilizing the first algorithm and the second algorithm to respectively calculate a first subgroup imaging position of the darkness point on the first group and a second subgroup imaging position of the darkness point on the second group;
setting the dimension ratio of the darkness point relative to the first group and the dimension ratio of the darkness point relative to the second group as weight indices; and
multiplying the first subgroup imaging position and the second subgroup imaging position respectively by the corresponding weight indices and adding up two multiplication results, so as to obtain the imaging position of the darkness point.
1 Assignment
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Accused Products
Abstract
A locating method applied to an optical touch device is disclosed. The optical touch device includes at least one image detecting component for detecting an imaging position of an object and generating a touch position of the object on a plane according to the imaging position. The at least one image detecting component includes a plurality of pixels. The locating method includes dividing the pixels into a first group and a second group along a first direction, analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is simultaneously detected by the first group and the second group, and calculating the imaging position of the darkness point inside the image detecting component according to the dimension ratios.
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Citations
27 Claims
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1. A locating method applied to an optical touch device, the optical touch device comprising at least one image detecting component for detecting an imaging position of an object and generating a touch position of the object on a plane according to the imaging position, the at least one image detecting component comprising a plurality of pixels, the locating method comprising:
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dividing the plurality of pixels into a first group and a second group along a first direction; analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is simultaneously detected by the first group and the second group, wherein a first algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the first group, and a second algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the second group; utilizing the first algorithm and the second algorithm to respectively calculate a first subgroup imaging position of the darkness point on the first group and a second subgroup imaging position of the darkness point on the second group; setting the dimension ratio of the darkness point relative to the first group and the dimension ratio of the darkness point relative to the second group as weight indices; and multiplying the first subgroup imaging position and the second subgroup imaging position respectively by the corresponding weight indices and adding up two multiplication results, so as to obtain the imaging position of the darkness point. - View Dependent Claims (2, 3, 4, 5)
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6. An optical touch device comprising:
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a frame comprising a first sidewall, a second sidewall, a third sidewall and a fourth sidewall, the first sidewall being opposite to the third sidewall, the second sidewall being opposite to the fourth sidewall, and a sensory area being formed inside the frame; a light source module for providing light to the sensory area; a first image detecting component disposed between two adjacent ends of the first sidewall and the second sidewall, a field of view of the first image detecting component covering the third sidewall and the fourth sidewall; and a second image detecting component disposed between two adjacent ends of the second sidewall and the third sidewall, a field of view of the second image detecting component covering the first sidewall and the fourth sidewall; wherein the first image detecting component and the second image detecting component respectively comprise a plurality of pixels, the plurality of pixels is at least divided into a first group and a second group along a first direction, dimension ratios of a darkness point relative to the first group and the second group are respectively analyzed when the darkness point formed by an object is simultaneously detected by the first group and the second group, so as to calculate an imaging position of the darkness point according to the dimension ratios, and to generate a touch position of the object on a plane according to the imaging position, a first algorithm is utilized to calculate the imaging position of the darkness point inside the first image detecting component when the darkness point formed by the object is detected by the first group of the first image detecting component, and a second algorithm is utilized to calculate the imaging position of the darkness point inside the first image detecting component when the darkness point formed by the object is detected by the second group of the first image detecting component, the first image detecting component utilizes the first algorithm and the second algorithm to respectively calculate temporary imaging positions or subgroup imaging positions of the darkness point, sets the dimension ratios of the darkness point relative to the first group and the second group respectively as weight indices, multiplies the temporary imaging positions or the subgroup imaging positions of the darkness point by the corresponding weight indices and adds up two multiplication results, so as to obtain the imaging position of the darkness point. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. An image detecting component applied to an optical touch device, the image detecting component comprising:
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a light receiving unit, the light receiving unit comprising a plurality of pixels for receiving an optical signal from an object, the plurality of pixels being divided into a first group and a second group along a first direction; a digital signal processing unit electrically connected to the light receiving unit for processing the optical signal detected by the plurality of pixels; and a central processing unit electrically connected to the digital signal processing unit, the central processing unit analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is simultaneously detected by the first group and the second group, and calculating an imaging position of the darkness point according to the dimension ratios, so as to generate a touch position of the object on a plane according to the imaging position, wherein the central processing unit utilizes a first algorithm to calculate the imaging position of the darkness point on the light receiving unit when the darkness point formed by the object is detected by the first group, and further utilizes a second algorithm to calculate the imaging position of the darkness point on the light receiving unit when the darkness point formed by the object is detected by the second group, the central processing unit utilizes the first algorithm and the second algorithm to respectively calculate temporary imaging positions or subgroup imaging positions of the darkness point, sets the dimension ratios of the darkness point relative to the first group and the second group respectively as weight indices, multiplies the temporary imaging positions or the subgroup imaging positions of the darkness point by the corresponding weight indices and adds up two multiplication results, so as to obtain the imaging position of the darkness point. - View Dependent Claims (16, 17, 18, 19)
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20. A locating method applied to an optical touch device, the optical touch device comprising at least one image detecting component for detecting an imaging position of an object and generating a touch position of the object on a plane according to the imaging position, the at least one image detecting component comprising a plurality of pixels, the locating method comprising:
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dividing the plurality of pixels into a first group and a second group along a first direction; analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is simultaneously detected by the first group and the second group, wherein a first algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the first group, and a second algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the second group; utilizing the first algorithm and the second algorithm to respectively calculate a first temporary imaging position and a second temporary imaging position of the darkness point inside the image detecting component; setting the dimension ratio of the darkness point relative to the first group and the dimension ratio of the darkness point relative to the second group as weight indices; and multiplying the first temporary imaging position and the second temporary imaging position respectively by the corresponding weight indices and adding up two multiplication results, so as to obtain the imaging position of the darkness point. - View Dependent Claims (21, 22, 23, 24)
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25. A locating method applied to an optical touch device, the optical touch device comprising at least one image detecting component for detecting an imaging position of an object and generating a touch position of the object on a plane according to the imaging position, the at least one image detecting component comprising a plurality of pixels, the locating method comprising:
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dividing the plurality of pixels into a first group and a second group along a first direction; analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is with simultaneously detected by the first group and the second group, wherein a first algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the first group, and a second algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the second group; and
calculating the imaging position of the darkness point inside the image detecting component according to the dimension ratios;wherein the plurality of pixels is divided into the first group, the second group and a third group along the first direction, the third group is located between the first group and the second group, a third algorithm is utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the third group, and the third algorithm comprises; utilizing the first algorithm and the second algorithm to respectively calculate a first temporary imaging position and a second temporary imaging position of the darkness point formed by the object to obtain a first value and a second value; multiplying the first value by a first weight α
to obtain a third value, and multiplying the second value by a second weight (1-α
) to obtain a fourth value, wherein a is greater than or equal to 0 and is further smaller than or equal to 1; andadding up the third value and the fourth value to obtain the imaging position of the darkness point. - View Dependent Claims (26, 27)
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Specification