Backlit lighting device, liquid crystal display device utilizing same, and liquid crystal display device manufacturing method
First Claim
Patent Images
1. A liquid crystal display device comprising:
- a backlit lighting device having a light guide plate, a light source installed on the side surface of said light guide plate and a light directional diffusing elements section of said light guide plate; and
a liquid crystal element;
wherein said light directional diffusing elements section is formed on at least one of an upper surface and a lower surface of said light guide plate near said light source and has a configuration of multiple light directional diffusing elements arranged in parallel to one another and substantially in parallel to an optical axis of light from said light source so as to make said light from said light source directional along a light guide plate surface and to diffuse said light from said light source along a flat surface of said light guide plate; and
wherein light emitted from said backlit lighting device irradiates onto said liquid crystal element.
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Abstract
Light directional diffusing elements such as hologram elements are formed on the upper surface or lower surface of a light guide plate near the light source, and dots are formed of multiple small protrusions or small depressions on the light guide plate upper or lower surface to change the direction the light transmits from the input surface of the upper surface of light guide plate to a specified angle to irradiate towards a display element, to obtain a liquid crystal display technology for an easy to assemble backlit lighting device with greater brightness and fewer dark spots.
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Citations
30 Claims
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1. A liquid crystal display device comprising:
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a backlit lighting device having a light guide plate, a light source installed on the side surface of said light guide plate and a light directional diffusing elements section of said light guide plate; and
a liquid crystal element;
wherein said light directional diffusing elements section is formed on at least one of an upper surface and a lower surface of said light guide plate near said light source and has a configuration of multiple light directional diffusing elements arranged in parallel to one another and substantially in parallel to an optical axis of light from said light source so as to make said light from said light source directional along a light guide plate surface and to diffuse said light from said light source along a flat surface of said light guide plate; and
wherein light emitted from said backlit lighting device irradiates onto said liquid crystal element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 23, 24, 25, 26, 27, 28)
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17. A backlit lighting device comprising:
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a light guide plate, a light source installed on the side surface of said light guide plate, and light directional diffusing elements section of said light guide plate;
wherein said light directional diffusing elements section is formed on at least one of an upper surface and a lower surface of said light guide plate near said light source and has a configuration of multiple light directional diffusing elements arranged in parallel to one another and substantially in parallel to an optical axis of light from said light source so as to make said light from said light source directional along a light guide plate surface and to diffuse said light from said light source along a flat surface of said light guide plate. - View Dependent Claims (18, 19, 29, 30)
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20. A manufacturing method for liquid crystal display devices comprising:
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a step to form a light source on a side surface of a light guide plate;
a step to form alight directional diffusing elements section of said light guide plate, wherein said light directional diffusing elements section is formed on at least one of an upper surface and a lower surface of said light guide plate near said light source and has a configuration of multiple light directional diffusing elements arranged in parallel to one another and substantially in parallel to an optical axis of light from said light source so as to make said light from said light source directional along a light guide plate surface and to diffuse said light from said light source along a flat surface of said light guide plate; and
a step to irradiate the-light emitted from said light guide plate onto a liquid crystal display element of the liquid crystal display devices. - View Dependent Claims (21, 22)
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Specification