Backlight device for liquid crystal display devices
AssigneeLG.Philips LCD Co., Ltd.
InventorsSeong-Man Jeon, Je-Hong Kim
Life of this patent
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Abstract
The present invention discloses a backlight device for a liquid crystal display device, which includes at least a lamp; at least a lamp housing surrounding the lamp and having an opening on a side; at least a light guide plate connected to the opening of the lamp housing, the light guide plate guiding light from the lamp; a reflector arranged on the rear surface of the light guide plate, the reflector reflecting the light from the lamp in a direction to the light guide plate; a pre-collimator disposed in the lamp housing between the lamp and the light guide plate; a diffusion sheet disposed on the front surface of the light guide plate; and a prism sheet disposed on the diffusion sheet.
Claims22
A backlight device for a liquid crystal display device, comprising:
- at least a lamp;
- at least a lamp housing surrounding the lamp and having an opening on a side;
- at least a light guide plate connected to the opening of the lamp housing, the light guide plate guiding light from the lamp;
- a reflector arranged on the rear surface of the light guide plate, the reflector reflecting the light from the lamp in a direction to the light guide plate;
- a pre-collimator disposed in the lamp housing between the lamp and the light guide plate;
- a diffusion sheet disposed on the front surface of the light guide plate;
- and
- a prism sheet disposed on the diffusion sheet;
- wherein the lamp housing has lower and upper portions;
- and
- wherein the lower and upper portions have first and second V-shaped grooves in the inner surfaces thereof.
A backlight device for a liquid crystal display device, comprising:
- at least a lamp;
- at least a lamp housing surrounding the lamp and having an opening on a side;
- at least a light guide plate connected to the opening of the lamp housing, the light guide plate guiding light from the lamp;
- a reflector arranged on the rear surface of the light guide plate, the reflector reflecting the light from the lamp in a direction to the light guide plate;
- a pre-collimator disposed in the lamp housing between the lamp and the light guide plate;
- a diffusion sheet disposed on the front surface of the light guide plate;
- and
- a prism sheet disposed on the diffusion sheet;
- wherein the lamp housing has lower and upper portions;
- and
- wherein the lower portion has a V-shaped groove in the inner surfaces thereof and the upper portion has a hole covered by a hole cover.
A backlight device for a liquid crystal display device, comprising:
- at least a lamp;
- at least a lamp housing surrounding the lamp and having an opening on a side;
- at least a light guide plate connected to the opening of the lamp housing, the light guide plate guiding light from the lamp;
- a reflector arranged on the rear surface of the light guide plate, the reflector reflecting the light from the lamp in a direction to the light guide plate;
- a pre-collimator disposed in the lamp housing between the lamp and the light guide plate;
- a diffusion sheet disposed on the front surface of the light guide plate;
- and
- a prism sheet disposed on the diffusion sheet;
- wherein the lamp housing has lower and upper portions;
- and
- wherein the lower and upper portions have Z-bands each having a step.
Dependencies are inferred from the claim text.