Backlight unit and liquid crystal display device having the same
First Claim
Patent Images
1. A backlight unit comprising:
- a discrete light source section configured to have individual light sources having different spectra or different light emission quantities;
a light guide section configured to have one end surface which is provided with an incident plane which receives a light emitted from the discrete light source section, a light guiding area which guides the light having entered from the incident plane, and a light emission plane which emits the light guided in the light guiding area;
a heat conduction section configured to conduct heat generated in the discrete light source section; and
a heat dissipation section disposed on a back side of the light emission plane and configured to dissipate heat conducted through the heat conduction section;
whereinthe heat conduction section has a substantially L-shaped heat conduction member which is bent along the light guide section and is substantially L-shaped in cross section.
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Accused Products
Abstract
A backlight unit has a light source, a reflection sheet, a light guide plate, an air space, and a diffuser, wherein the reflection sheet, the light guide plate, the air space, and the diffuser are overlaid in this order. The light source is configured to arrange individual light sources having different spectra or different light emission quantities near an incident plane of the light guide plate, and on a plane facing the reflection sheet of the light guide plate, scatter dots are disposed which take light propagating through the light guide plate out of the reflection sheet side. The backlight unit and a liquid crystal display device including the same have excellent display quality.
60 Citations
49 Claims
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1. A backlight unit comprising:
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a discrete light source section configured to have individual light sources having different spectra or different light emission quantities; a light guide section configured to have one end surface which is provided with an incident plane which receives a light emitted from the discrete light source section, a light guiding area which guides the light having entered from the incident plane, and a light emission plane which emits the light guided in the light guiding area; a heat conduction section configured to conduct heat generated in the discrete light source section; and a heat dissipation section disposed on a back side of the light emission plane and configured to dissipate heat conducted through the heat conduction section;
whereinthe heat conduction section has a substantially L-shaped heat conduction member which is bent along the light guide section and is substantially L-shaped in cross section. - 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 backlight unit provided with a discrete light source section configured to have individual light sources having different spectra or different light emission quantities, a light guide section configured to have one end surface provided with an incident plane which receives a light emitted from the discrete light source section, a light guiding area which guides the light having entered from the incident plane, and a light emission plane which emits the light guided in the light guiding area, a heat conduction section configured to conduct heat generated in the discrete light source section, and a heat dissipation section disposed on a back side of the light emission plane and configured to dissipate heat conducted through the heat conduction section; a liquid crystal display panel disposed on a light emission plane side of the light guide plate; and an accommodating section configured to accommodate the backlight unit and the liquid crystal display panel which is made of a high heat radiating material to thermally contact with the backlight unit to dissipate heat generated in the discrete light source section;
whereinthe heat conduction section has a substantially L-shaped heat conduction member which is bent along the light guide section and is substantially L-shaped in cross section. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A backlight unit comprising:
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a discrete light source section configured to have individual light sources having different spectra or different light emission quantities; a light guide section configured to have one end surface provided with an incident plane which receives a light emitted from the discrete light source section, a light guiding area which guides the light having entered from the incident plane, and a light emission plane which emits the light guided in the light guiding area; a heat conduction section configured to conduct heat generated in the discrete light source section; and a heat insulating section configured to have a contact surface which covers and thermally contacts with a portion of an outer surface of the heat conduction section and to insulate heat as a temperature of the heat conduction section substantially uniformly. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification