Backlight unit and liquid crystal display apparatus employing the same
First Claim
1. A backlight unit comprising:
- a plurality of light-emitting device units disposed on a base plate in an array, each light-emitting device unit including a collimator to collimate light emitted by a light-emitting device so that the light propagates in a principal propagation direction;
a plurality of side reflectors disposed in the principal propagation direction opposite to the corresponding light-emitting device units, to reflect the light incident from the corresponding light-emitting device units in lateral directions;
a reflective diffusion plate to reflect and diffuse the light reflected by the side reflectors; and
a transmissive diffusion plate that is disposed behind the light-emitting device units in the principal propagation direction, to transmit and diffuse the incident and reflected light.
1 Assignment
0 Petitions
Accused Products
Abstract
A backlight unit and a liquid crystal display (LCD) apparatus employing the backlight unit. The backlight unit includes a plurality of light-emitting device units disposed on a base plate in an array, each light-emitting device unit including a collimator to collimate light emitted by a light-emitting device so that the light propagates in a principal propagation direction of light emitted from light-emitting device, a plurality of side reflectors disposed in an array above the array of corresponding light-emitting device units and to reflect lateral light incident from the corresponding light-emitting device units, a reflective diffusion plate to reflect and diffuse light incident from the side reflectors, and a transmissive diffusion plate that is disposed above the light-emitting device units, to transmit and diffuse the incident and reflected light.
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Citations
31 Claims
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1. A backlight unit comprising:
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a plurality of light-emitting device units disposed on a base plate in an array, each light-emitting device unit including a collimator to collimate light emitted by a light-emitting device so that the light propagates in a principal propagation direction;
a plurality of side reflectors disposed in the principal propagation direction opposite to the corresponding light-emitting device units, to reflect the light incident from the corresponding light-emitting device units in lateral directions;
a reflective diffusion plate to reflect and diffuse the light reflected by the side reflectors; and
a transmissive diffusion plate that is disposed behind the light-emitting device units in the principal propagation direction, to transmit and diffuse the incident and reflected light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A liquid crystal display apparatus comprising:
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a liquid crystal panel; and
a backlight including;
a plurality of light-emitting device units disposed on a base plate in an array, each light-emitting device unit including a collimator to collimate light emitted by a light-emitting device so that the light propagates in a principal propagation direction, a plurality of side reflectors disposed in an array above the array of corresponding light-emitting device units, to reflect in lateral directions the light incident from the corresponding light-emitting device units, a reflective diffusion plate to reflect and diffuse light reflected by the side reflectors, and a transmissive diffusion plate that is disposed above the light-emitting device units, to transmit and diffuse the incident and reflected light toward the liquid crystal panel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of providing a backlight to a panel, the method comprising:
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emitting light by an array of light-emitting device units disposed on a base plate in an array, each light-emitting device unit including a collimator to collimate light emitted by a light-emitting device so that the light propagates in a principal propagation direction;
reflecting in lateral directions the light incident from the light-emitting units, by a plurality of side reflectors disposed above each light-emitting device unit;
reflecting and diffusing the lateral reflected light; and
transmitting and diffusing the light in the principal propagation direction.
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22. A backlight unit comprising:
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a base plate;
a reflective diffusing plate formed on the base plate;
a plurality of light-emitting device units disposed on the reflective diffusing plate and spaced apart from each other to emit light in a principal propagation direction;
a transmission diffusion plate spaced apart from the reflecting diffusing plate; and
a plurality of side reflectors formed on the transmissive diffusion plate to reflect the light from corresponding ones of the plurality of light-emitting device units, in a lateral direction. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A method to form a backlight unit comprising:
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forming a base plate;
forming a reflective diffusing plate formed on the base plate;
placing a plurality of light-emitting device units on the reflective diffusing plate to be spaced apart from each other so that the light-emitting device units emit light in a principal propagation direction;
forming a transmission diffusion plate to be spaced apart from the reflecting diffusing plate; and
forming a plurality of side reflectors formed on the transmissive diffusion plate to reflect the light from each of corresponding light-emitting device units, in lateral directions.
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Specification