Image Display Device and Image Display System
2 Assignments
0 Petitions
Accused Products
Abstract
An image display device and an image display system which can establish visible light communication without interfering with an image displayed at a predetermined frame rate are provided. A controller 12 controls a spatial light modulator in accordance with an image signal to display the image, and also modulates an intensity of a visible light output from a backlight 13 with a frequency higher than the frame rate of the image signal to have the visible light output from the backlight 13 carry additional information. A light receiver 15 receives the visible light and demodulates to extract the additional information. An additional information generator 16 outputs the additional information.
143 Citations
86 Claims
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1-43. -43. (canceled)
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44. An image display device, comprising:
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a display section which includes a light source and displays an image based on a visible light output from the light source; and a controller for having the display section display the image at a predetermined frame rate, modulating an intensity of the visible light with a frequency higher than the frame rate, and having the visible light carry predetermined information. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. An image display system formed of a plurality of image display devices, wherein:
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each image display device includes a display section which includes a light source and displays an image based on a visible light output from the light source, a controller for having the display section display the image at a predetermined frame rate, modulating an intensity of the visible light with a frequency higher than the frame rate, and having the visible light carry additional information added to the image signal, and a light receiver for receiving a visible light for showing an image displayed on the display section and extracting additional information from the received visible light; and communication using visible lights is established among the plurality of image display devices. - View Dependent Claims (81, 82)
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83. An image display system, comprising:
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an image display device which includes a display section which includes a light source and displays an image based on a visible light output from the light source, and a controller for having the display section display the image at a predetermined frame rate, modulating an intensity of the visible light with a frequency higher than the frame rate, and having the visible light carry additional information added to the image signal; a light receiver for receiving a visible light for showing an image displayed on the display section and extracting additional information from the received visible light; and an additional information generator for outputting additional information extracted by the light receiver.
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84. An image display system formed of an image display device and a viewer device, wherein:
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the image display device includes a display section which includes a light source and displays an image based on a visible light output from the light source, and a controller for modifying an intensity of the visible light from the light source using multiple types of information for modulating an intensity with multiple types of frequencies higher than the frame rate of the image and controlling the light source such that visible lights having the intensity modified using the multiple types of information are respectively output from different display areas; and the viewer device includes a light receiver for receiving visible lights output from the display areas of the display section which are reflected off an object, and a position specifying section for specifying a position of the object based on a phase difference among the reflected light received by the light receiver. - View Dependent Claims (86)
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85. An image display system formed of an image display device and a viewer device, wherein:
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the image display device includes a display section which includes a light source for outputting multiple types of visible lights having different wavelengths, and which displays an image based on a visible light output from the light source, and a controller for controlling the light source such that a type of a visible light varies for each of the display areas using information for modulating an intensity with frequencies higher than the frame rate of the image; and the viewer device includes a light receiver for receiving visible lights output from the display areas of the display section which are reflected off an object, and a position specifying section for specifying a position of the object based on a phase difference among the reflected light received by the light receiver.
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Specification