Lighting device, display device and television receiver
First Claim
1. A lighting device, comprising:
- a light source;
a chassis housing the light source;
a reflection sheet disposed within the chassis and reflecting light; and
a heat insulator disposed between the chassis and the reflection sheet;
whereinthe chassis is disposed such that a main plate surface thereof is aligned along a vertical direction;
the chassis includes at least an upper portion and a lower portion;
the heat insulator includes an upper portion overlapping area overlapping the upper portion of the chassis and a lower portion overlapping area overlapping the lower portion of the chassis, the upper portion overlapping area is smaller than the lower portion overlapping area;
the heat insulator has a shape such that an area thereof decreases from bottom to top in the vertical direction; and
the upper portion overlapping area is formed such that an area thereof gradually decreases from bottom to top in the vertical direction.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention is intended to provide a lighting device that shortens time required to obtain peak brightness. A backlight unit 16 according to the invention includes: cold cathode tubes 22 as a light source; a chassis 18 housing the cold cathode tubes 22; a reflection sheet 21 disposed within the chassis 18 and reflecting light; and a heat insulator 27 disposed between the chassis 18 and the reflection sheet 21. Because the heat insulator 27 is disposes between the chassis 18 and the reflection sheet 21, heat in the chassis 18 is less likely to escape to the outside. Therefore, the temperature inside the chassis 18 can be efficiently increased with the heat generated by the cold cathode tubes 22.
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Citations
22 Claims
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1. A lighting device, comprising:
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a light source; a chassis housing the light source; a reflection sheet disposed within the chassis and reflecting light; and a heat insulator disposed between the chassis and the reflection sheet;
whereinthe chassis is disposed such that a main plate surface thereof is aligned along a vertical direction; the chassis includes at least an upper portion and a lower portion; the heat insulator includes an upper portion overlapping area overlapping the upper portion of the chassis and a lower portion overlapping area overlapping the lower portion of the chassis, the upper portion overlapping area is smaller than the lower portion overlapping area; the heat insulator has a shape such that an area thereof decreases from bottom to top in the vertical direction; and the upper portion overlapping area is formed such that an area thereof gradually decreases from bottom to top in the vertical direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A lighting device, comprising:
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a light source; a chassis housing the light source; a reflection sheet disposed within the chassis and reflecting light; and a heat insulator disposed between the chassis and the reflection sheet;
whereinthe chassis is disposed such that a main plate surface thereof is aligned along a vertical direction; the chassis includes at least an upper portion and a lower portion; the heat insulator includes an upper portion overlapping area overlapping the upper portion of the chassis and a lower portion overlapping area overlapping the lower portion of the chassis, the upper portion overlapping area is smaller than the lower portion overlapping area; the heat insulator has a shape such that an area thereof decreases from bottom to top in the vertical direction; and the upper portion overlapping area is formed such that an area thereof decreases stepwise from bottom to top in the vertical direction. - View Dependent Claims (14, 15, 16, 17)
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18. A lighting device, comprising:
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a light source; a chassis housing the light source; a reflection sheet disposed within the chassis and reflecting light; and a heat insulator disposed between the chassis and the reflection sheet;
whereinthe chassis has a bottom plate disposed on a side opposite to a light output side with respect to the light source; the reflection sheet and the heat insulator are disposed so as to extend over a substantially entire area of the bottom plate; the chassis has a side plate rising from the bottom plate toward the light output side, and the reflection sheet and the heat insulator have bottom portions disposed along the bottom plate and rising portions rising from the respective bottom portion toward the light output side and disposed along the side plate; the chassis has a receiving plate jutting outward from a distal end of the side plate; and the reflection sheet and the heat insulator have extending portions extending from an edge of the distal end along the receiving plate. - View Dependent Claims (19, 20, 21, 22)
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Specification