Back lighting device
First Claim
1. A back lighting device, comprising:
- a light-conducting plate made of a light-transmissive material;
a linear light source provided in proximity to the end portion of at least one side of said light-conducting plate; and
one of a reflecting plate and a reflecting film that covers said linear light source and which comprises, in order from the light source side, one of a specular reflecting plate and a specular reflecting film, an air layer and one of a light diffusing/reflecting plate and a light diffusing/reflecting film in superposition, wherein one surface of said light-conducting plate is provided with a light diffusing capability and is covered with one of a specular reflecting plate and a light diffusing/reflecting plate.
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Accused Products
Abstract
A back lighting device which comprises a light conducting plate made of a light-transmissive material, a linear light source provided in proximity to the end portion of at least one side of the light conducting plate, a reflecting plate or film that covers the linear light source and which consists, in order from the light source side, of a specular reflecting plate or film, an air layer and a light diffusing/reflecting plate or film in superposition. One surface of the light conducting plate is provided with a light diffusing capability and covered with a specular or light diffusing/reflecting plate. Thereby, it is possible to provide a back lighting device that has a high efficiency of power to luminance conversion and which hence is capable of achieving high luminance.
138 Citations
19 Claims
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1. A back lighting device, comprising:
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a light-conducting plate made of a light-transmissive material; a linear light source provided in proximity to the end portion of at least one side of said light-conducting plate; and one of a reflecting plate and a reflecting film that covers said linear light source and which comprises, in order from the light source side, one of a specular reflecting plate and a specular reflecting film, an air layer and one of a light diffusing/reflecting plate and a light diffusing/reflecting film in superposition, wherein one surface of said light-conducting plate is provided with a light diffusing capability and is covered with one of a specular reflecting plate and a light diffusing/reflecting plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13)
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10. A back lighting device comprising:
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a light conducting plate made of a light-transmissive material; a linear light source provided in proximity to the end portion of at least one side of said light conducting plate; and a light reflecting plate or film that covers part of said linear light source in such a way that the distance between the outer surface of said light source and the inner surface of said light reflecting plate or film is greater in substantially the center area of the outer side than in the other areas of said outer side or that said light reflecting plate or film is positioned in said outer side area in contact with the outer surface of said linear light source, said "outer side" being opposite the "inner side" where the surface of said linear light source faces the light conducting plate one surface of said light conducting plate being provided with a light diffusing capability and covered with a specular or light diffusing/reflecting plate. - View Dependent Claims (11, 12)
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14. A back lighting device, comprising:
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a light-conducting plate made of a light-transmissive material; a linear light source provided in proximity to the end portion of at least one side of said light-conducting plate; and one of a reflecting plate and a reflecting film that covers said linear light source and which includes one of a specular reflecting plate and a specular reflecting film, said one of a specular reflecting plate and a specular reflecting film being adjacent and directly opposed to and confronting said linear light source, wherein one surface of said light conducting plate is provided with a light diffusing capability and is covered with one of a specular reflecting plate and a light diffusing/reflecting plate, and wherein at least a portion of said linear light source is out of contact with said one of a reflecting plate and a reflecting film. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification