Backlight generating apparatus of a liquid crystal display device
First Claim
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1. A backlight generating apparatus of an LCD device comprising:
- a diffusing plate;
a light-passing plate and a reflecting plate sequentially stacked onto one another, said light-passing plate having a sloped surface which opposes said diffusing plate;
diffusing material having a selected index of refraction sandwiched between said light-passing plate and said diffusing plate; and
a lamp placed on an edge of said light-passing plate which is closest to said diffusing plate.
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Abstract
A backlight generating apparatus of an LCD device comprising a light-passing plate which is sloped with respect to a diffusing plate by a predetermined angle. The space between the two plates is filled with a diffusing material having a larger index of refraction than that of the light-passing plate. The present invention employs a diffusing plate with a transmissivity of over 30% to increase light efficiency, improve brightness, and decrease power consumption.
41 Citations
13 Claims
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1. A backlight generating apparatus of an LCD device comprising:
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a diffusing plate; a light-passing plate and a reflecting plate sequentially stacked onto one another, said light-passing plate having a sloped surface which opposes said diffusing plate; diffusing material having a selected index of refraction sandwiched between said light-passing plate and said diffusing plate; and a lamp placed on an edge of said light-passing plate which is closest to said diffusing plate. - View Dependent Claims (2, 3, 4)
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5. A backlight generating apparatus of an LCD device comprising:
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a light-passing plate having a sloped upper surface and a lower surface; a diffusing plate stacked on the sloped upper surface of said light-passing plate so that an aperture is created between said light-passing plate and said diffusing plate; a reflecting plate opposing the lower surface of said light-passing plate; and diffusing material disposed in the aperture between said diffusing plate and said light-passing plate having a lower surface that matches the slope of the upper surface of said light-passing plate. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A backlight generating apparatus of an LCD device comprising:
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a light-passing plate having a sloped upper surface and a lower surface; a diffusing plate stacked on the sloped upper surface of said light-passing plate so that an aperture is created between said light-passing plate and said diffusing plate; diffusing material disposed in the aperture between said diffusing plate and said light-passing plate having a lower surface that matches the slope of the upper surface of said light-passing plate; a lamp disposed proximate to an edge of said light-passing plate such that light generated by the lamp is processed through said light-passing plate and then irregularly reflected on the sloped face of said light-passing plate and part of the light is refracted by said diffusing material; and means for re-reflecting light reflected by said light-passing plate and for directing the re-reflected light to said diffusing material.
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Specification