Backlight unit and liquid crystal display device
First Claim
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1. A backlight unit for use in a liquid crystal display device, comprising:
- a reflection plate;
a plurality of fluorescent tubes; and
a diffusion plate, whereinthe reflection plate includesa rectangular-shaped bottom plate section,four side plate sections respectively formed upright from four sides of the bottom plate section with a skew in the direction of moving away from the bottom plate section, andan edge plate section that protrudes from a tip end of each of the side plate sections toward outside thereof,an open space is formed by the bottom plate section and the four side plate sections in the tip end direction of the side plate sections,the fluorescent tubes are disposed above the bottom plate section in the space,a side which is one of the sides of the edge plate section in the thickness direction and is located away from the bottom plate section is formed as a first abutment plane against which the diffusion plate is abutted,at a portion of at least one of the four side plate sections closer to an inner surface of the edge plate section facing the space, a rib is protruded from the inner surface in the space,an end portion where the rib is away from the bottom plate section is extended on a plane same as the first abutment plane, and is formed as a second abutment plane for abutment by the diffusion plate, andthe diffusion plate is disposed by being abutted against the first abutment plane at four sides, and by being abutted against the second abutment plane thereat.
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Abstract
A backlight unit for use in a liquid crystal display device is disclosed. The backlight unit which may include a reflection plate; a plurality of fluorescent tubes; and a diffusion plate. The reflection plate may include a rectangular-shaped bottom plate section, four side plate sections respectively formed upright from four sides of the bottom plate section with a skew in the direction of moving away from the bottom plate section, and an edge plate section that protrudes from a tip end of each of the side plate sections toward outside thereof.
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Citations
13 Claims
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1. A backlight unit for use in a liquid crystal display device, comprising:
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a reflection plate; a plurality of fluorescent tubes; and a diffusion plate, wherein the reflection plate includes a rectangular-shaped bottom plate section, four side plate sections respectively formed upright from four sides of the bottom plate section with a skew in the direction of moving away from the bottom plate section, and an edge plate section that protrudes from a tip end of each of the side plate sections toward outside thereof, an open space is formed by the bottom plate section and the four side plate sections in the tip end direction of the side plate sections, the fluorescent tubes are disposed above the bottom plate section in the space, a side which is one of the sides of the edge plate section in the thickness direction and is located away from the bottom plate section is formed as a first abutment plane against which the diffusion plate is abutted, at a portion of at least one of the four side plate sections closer to an inner surface of the edge plate section facing the space, a rib is protruded from the inner surface in the space, an end portion where the rib is away from the bottom plate section is extended on a plane same as the first abutment plane, and is formed as a second abutment plane for abutment by the diffusion plate, and the diffusion plate is disposed by being abutted against the first abutment plane at four sides, and by being abutted against the second abutment plane thereat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A liquid crystal display device, comprising:
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a chassis; a liquid crystal panel equipped inside the chassis with a display screen thereof facing a front aperture of the chassis; and a backlight unit disposed inside the chassis and at the rear of the liquid crystal panel, wherein the backlight unit includes a reflection plate, a plurality of fluorescent tubes, and a diffusion plate, the reflection plate includes a rectangular-shaped bottom plate section, four side plate sections respectively formed upright from four sides of the bottom plate section with a skew in the direction of moving away from the bottom plate section, and an edge plate section that protrudes from a tip end of each of the side plate sections toward outside thereof, an open space is formed by the bottom plate section and the four side plate sections in the direction of the liquid crystal panel, the fluorescent tubes are disposed above the bottom plate section in the space, a side which is one of the sides of the edge plate section in the thickness direction and is located away from the bottom plate section is formed as a first abutment plane against which the diffusion plate is abutted, at a portion of at least one of the four side plate sections closer to an inner surface of the edge plate section facing the space, a rib is protruded from the inner surface in the space, an end portion where the rib is away from the bottom plate section is extended on a plane same as the first abutment plane, and is formed as a second abutment plane for abutment by the diffusion plate, and the diffusion plate is disposed by being abutted against the first abutment plane at four sides, and by being abutted against the second abutment plane thereat. - View Dependent Claims (12)
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11. A reflection plate configuring a backlight unit for use in a liquid crystal display device, being made of a material with a high reflection coefficient, and comprising:
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a rectangular-shaped bottom plate section; four side plate sections respectively formed upright from four sides of the bottom plate section with a skew in the direction of moving away from the bottom plate section; and an edge plate section that protrudes from a tip end of each of the side plate sections toward outside thereof, wherein a space for placement of a fluorescent tube is formed open by the bottom plate section and the four side plate sections in the tip end direction of the side plate sections, a side which is one of the sides of the edge plate section in the thickness direction and is located away from the bottom plate section is formed as a first abutment plane, at a portion of at least one of the four side plate sections closer to an inner surface of the edge plate section facing the space, a rib is protruded from the inner surface in the space, and an end portion where the rib is away from the bottom plate section is formed as a second abutment plane being extended on a plane same as the first abutment plane. - View Dependent Claims (13)
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Specification
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Current AssigneeSony Corporation (Sony Group Corp.)
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Original AssigneeSony Corporation (Sony Group Corp.)
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InventorsHayashimoto, Seiji
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Primary Examiner(s)Le; Uyen-Chau N
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Assistant Examiner(s)TRAN, HOANG Q
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Application NumberUS11/906,763Publication NumberTime in Patent Office839 DaysField of Search349/67US Class Current349/67CPC Class CodesG02F 1/133604 with lampsG02F 1/133605 including specially adapted...G02F 1/133608 including particular frames...
