COORDINATE SENSOR, ELECTRONIC DEVICE, DISPLAY DEVICE, LIGHT-RECEIVING UNIT
1 Assignment
0 Petitions
Accused Products
Abstract
A coordinate sensor (10) includes at least two line sensors (1) that are disposed in x-axis and y-axis directions, and right-angle prisms (2) each of which changes a light path of light that has passed through an image display region of a liquid crystal panel (20). Each of the line sensors (1) is disposed outside the image display region and has a light-receiving surface (1a) parallel to an image display surface of the liquid crystal panel (20). The right angle prisms (2) cause light which travels in the x-axis and y-axis directions and which has passed through the image display region to be guided to the light-receiving surfaces (1a) of the line sensors (1). The coordinate sensor (10) receives the light which has thus passed through the image display region of the liquid crystal panel (20) so as to detect a coordinate, on the image display region, that is indicated by an object to be detected such as a finger. Consequently, a thin coordinate sensor that enables easy alignment with no reduction in aperture ratio and no restriction on operation speed can be realized at low cost.
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Citations
56 Claims
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1-18. -18. (canceled)
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19. A coordinate sensor which detects, based on a difference in amount of light received by light-receiving elements, an indicated coordinate, on an image display region of an image display member, that is indicated by an object to be detected, comprising:
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at least two line sensors including a line sensor having light-receiving elements disposed in an x-axis direction and a line sensor having light-receiving elements disposed in a y-axis direction; and light path changing sections that are paired with the respective line sensors and that are disposed outside the image display region in the x-axis direction and the y-axis direction, the light path changing sections changing a light path of light that enters the light path changing sections, said at least two line sensors being disposed outside the image display region and having light-receiving surfaces parallel to an image display surface of the image display member, and the light path changing sections each being provided on the image display member and causing light that enters the light path changing sections after radially traveling along the image display surface within a plane parallel to the image display surface to be guided to a light-receiving surface of a corresponding one of said at least two line sensors. - View Dependent Claims (21, 22, 23, 28, 29, 30, 32, 33, 34, 35)
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20. A coordinate sensor which detects, based on a difference in amount of light received by light-receiving elements, an indicated coordinate, on an image display region of an image display member, that is indicated by an object to be detected, comprising:
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at least two line sensors including a line sensor having light-receiving elements disposed in an x-axis direction and a line sensor having light-receiving elements disposed in a y-axis direction; and light path changing sections that are paired with the respective line sensors and that are disposed outside the image display region in the x-axis direction and the y-axis direction, the light path changing sections changing a light path of light that enters the light path changing sections, said at least two line sensors being disposed outside the image display region and having light-receiving surfaces parallel to an image display surface of the image display member, the light path changing sections each being provided on the image display member and causing light that enters the light path changing sections from above the image display region and that travels over the image display region along the image display surface to be guided to a light-receiving surface of a corresponding one of said at least two line sensors, and said at least two line sensors including line sensors disposed in parallel in the x-axis direction and line sensors disposed in parallel in the y-axis direction, and receiving light that enters the light path changing sections. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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24-27. -27. (canceled)
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31. (canceled)
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36-41. -41. (canceled)
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42. A display device with a built-in coordinate sensor which display device includes an electronic display panel including an array substrate, the display device detecting, based on a difference in amount of light received by light-receiving elements, an indicated coordinate, on an image display region of the electronic display panel, that is indicated by an object to be detected, comprising:
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at least two line sensors including a line sensor having light-receiving elements disposed in an x-axis direction and a line sensor having light-receiving elements disposed in a y-axis direction; light path changing sections that are paired with the respective line sensors and that are disposed outside the image display region in the x-axis direction and the y-axis direction, the light path changing sections changing a light path of light that enters the light path changing sections, and a light guide member located at least in the image display region on the electronic display panel, the light guide member causing light that enters the image display region to propagate in the x-axis direction and the y-axis direction in the image display region and to be guided to the light path changing sections, said at least two line sensors being provided, outside the image display region, on a circuit formation surface of the array substrate and having light-receiving surfaces parallel to an image display surface of the electronic display panel, and the light path changing sections each guiding the light that enters the light path changing sections to a light-receiving surface of a corresponding one of said at least two line sensors. - View Dependent Claims (43, 44)
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45-46. -46. (canceled)
Specification