Backlight device and liquid-crystal display device
First Claim
1. A backlight device, comprising:
- a light-guide plate that conducts incident light from an end face to a front side;
a light source that irradiates light toward the end face;
a back face chassis that is provided on a side of a back face of the light-guide plate; and
a heat radiation member formed by a monolithic material and provided on a side of a back face of the back face chassis and dissipates heat from the light source,the heat radiation member having chassis contact portions formed by a plurality of rectangular surfaces that protrudes toward the back face chassis such that the chassis contact portions make partial contact with the back face of the back face chassis at multiple sites, whereinthe chassis contact portions further from the light source have larger contact areas with the back face chassis than the chassis contact portions closer to the light source.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are a backlight device and a liquid-crystal display device whereby, while carrying out a radiation countermeasure of a light source, uniformity of temperature of a back face chassis is effected. The backlight device comprises: a light-guide plate (12) which emits toward the front face side light which enters from an end face; a light source (14a) which projects light toward the end face; a back face chassis (9) which is disposed on the back face side of the light-guide plate; and a heat radiation member (8a) which is disposed on the back face side of the back face chassis, and which dissipates heat from the light source. The heat radiation member further comprises chassis contact portions (38a-38c) which make partial contact with the back face of the back face chassis at multiple sites.
19 Citations
7 Claims
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1. A backlight device, comprising:
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a light-guide plate that conducts incident light from an end face to a front side; a light source that irradiates light toward the end face; a back face chassis that is provided on a side of a back face of the light-guide plate; and a heat radiation member formed by a monolithic material and provided on a side of a back face of the back face chassis and dissipates heat from the light source, the heat radiation member having chassis contact portions formed by a plurality of rectangular surfaces that protrudes toward the back face chassis such that the chassis contact portions make partial contact with the back face of the back face chassis at multiple sites, wherein the chassis contact portions further from the light source have larger contact areas with the back face chassis than the chassis contact portions closer to the light source. - View Dependent Claims (2, 3, 4)
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5. A backlight device, comprising:
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a light-guide plate that conducts incident light from an end face to a front side; a light source that irradiates light toward the end face; a back face chassis that is provided on a side of a back face of the light-guide plate; and a heat radiation member that is provided on a side of a back face of the back face chassis, holds the light source at a site extended toward the end face, and dissipates heat from the light source, the heat radiation member having a chassis holding portion that determines a position of the back face chassis, wherein a bend portion that an end edge of the back face chassis is bent to the side of the back face of the back face chassis is included and an inner side of the bend portion and the chassis holding portion are engaged to prevent movement of the back face chassis in a vertical direction of the back face chassis. - View Dependent Claims (6, 7)
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Specification