Optical Touch Display System
First Claim
1. An optical touch display system, comprising:
- a touch region;
a light source, disposed on a periphery of the touch region, the light source positioned at least partially above the touch region, such that light rays emitted from the light source may traverse the touch region;
a reflector, disposed on at least a part of the periphery of the touch region, for reflecting the light rays emitted from the light source and generating a mirrored image of a set of touch points;
an image sensor, disposed above the light source, for receiving light rays of the light source, reflected from the set of touch points on the touch region and the reflector, and generating a two-dimensional image accordingly;
wherein the two-dimensional image comprises a set of optical images, the set of optical images comprising a set of real images corresponding to the set of touch points, and a set of virtual images corresponding to the set of touch points, generated by the light rays from the light source reflected by the reflector; and
a processing device, for generating a set of output coordinates corresponding to the set of touch points according to positions of the set of real images and the set of virtual images in the two-dimensional image.
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Accused Products
Abstract
Optical touch display system includes a light source, a reflector, an image sensor, and a processing device. The light source emits light to at least one object directly and emits light to the at least one object via the reflector at the same time. Then the image sensor receives light reflected from the at least one object directly and light reflected via the reflector simultaneously to form a set of imaging objects which have similar color parameters on an image. Then the processing device produces a set of still image parameters of the image objects such as gravity centers and border boundaries. Based on the still image parameters, the processing device determines the coordinates of the least one object on the optical touch display.
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Citations
29 Claims
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1. An optical touch display system, comprising:
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a touch region; a light source, disposed on a periphery of the touch region, the light source positioned at least partially above the touch region, such that light rays emitted from the light source may traverse the touch region; a reflector, disposed on at least a part of the periphery of the touch region, for reflecting the light rays emitted from the light source and generating a mirrored image of a set of touch points; an image sensor, disposed above the light source, for receiving light rays of the light source, reflected from the set of touch points on the touch region and the reflector, and generating a two-dimensional image accordingly; wherein the two-dimensional image comprises a set of optical images, the set of optical images comprising a set of real images corresponding to the set of touch points, and a set of virtual images corresponding to the set of touch points, generated by the light rays from the light source reflected by the reflector; and a processing device, for generating a set of output coordinates corresponding to the set of touch points according to positions of the set of real images and the set of virtual images in the two-dimensional image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical touch display system, comprising:
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a touch region; a light source, on a periphery of the touch region, the light source positioned at least partially above the touch region, such that light rays emitted from the light source may traverse the touch region; an image sensor, disposed above the light source, for receiving light rays of the light source, reflected from a set of touch points on the touch region, and generating a two-dimensional image accordingly ; wherein the two-dimensional image comprises a set of optical images corresponding to the set of touch points; a distance measurement device, connected to the light source and the image sensor, for controlling the light source and the image sensor, and generating a set of image distances corresponding to the set of optical images according to coordinates of the set of optical images in the two-dimensional image along a first direction; an angle measurement device, connected to the image sensor, for generating a set of image angles corresponding to the set of optical images according to coordinates of the set of optical images in the two-dimensional image along a second direction; and a processor, for generating a set of output coordinates according to the set of image distances and the set of image angles. - View Dependent Claims (16, 17, 18)
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19. An optical touch display system, comprising:
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a touch region; a light source, disposed on a periphery of the touch region, the light source positioned at least partially above the touch region, such that light rays emitted from the light source may traverse the touch region; a first image sensor, disposed above the light source, for receiving light rays of the light source, reflected from a set of touch points on the touch region, and generating a first two-dimensional image accordingly; wherein the first two-dimensional image comprises a first set of real images corresponding to the set of touch points; a second image sensor, disposed on the periphery of the touch region, for receiving light rays of the light source, reflected from the set of touch points on the touch region, and generating a second two-dimensional image accordingly; wherein the second two-dimensional image comprises a second set of real images corresponding to the set of touch points; a distance measurement device, connected to the light source and the first image sensor, for controlling the first image sensor and the light source, and generating a first set of image distances corresponding to the first set of real images according to coordinates of the first set of real images in the two-dimensional image along a first direction; and a processor, for generating a first set of real-image lines according to the first set of real images and a position of the first image sensor in the first two-dimensional image, and generating a second set of real-image lines according to the second set of real images and a position of the second image sensor in the second two-dimensional image, and the processing device generates a set of candidate coordinates corresponding to the set of touch points according to the first set of real-image lines and the second set of real-image lines, and generates a set of output coordinates corresponding to the set of touch points according to the set of candidate coordinates and the first set of image distances. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification