Backlight device, liquid crystal display device, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9316862-B2
Application number	US-76939407-A
Country	US
Kind code	B2
Filing date	Jun 27, 2007
Priority date	Jun 30, 2006
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A backlight device illuminates a transmissive liquid crystal panel from a rear surface thereof, and includes light source substrates, a reflecting sheet, a diffusing-guiding plate, and an optical-function-sheet layered body. The substrates have light-emitting elements for illuminating illumination light. The reflecting sheet has the substrates mounted to one surface thereof, has an opening formed in correspondence with the light-emitting elements, allows the light-emitting elements to be exposed at another surface of the reflecting sheet from the opening, and reflects the illumination light from the light-emitting elements by the another surface. The plate faces the another surface side of the sheet at a predetermined interval from the reflecting sheet, and diffuses in a layer thereof the illumination light incident from the reflecting sheet. The layered body is combined to the plate, includes laminated optical function sheets, and guides the illumination light to the panel.

First claim

What is claimed is:

1. A backlight device that illuminates a transmissive liquid crystal panel from a rear surface side thereof, the backlight device comprising:
a plurality of light source substrates having a plurality of light-emitting elements for emitting illumination light;
a reflecting sheet having the plurality of light source substrates mounted directly to one surface of the reflecting sheet, the reflecting sheet having an opening formed at a location in correspondence with the light-emitting elements mounted to the light source substrates, the reflecting sheet allowing the light-emitting elements to be exposed at another surface of the reflecting sheet from the opening and reflecting the illumination light from the light-emitting elements by said another surface;
a diffusing-guiding plate facing said another surface of the reflecting sheet at a predetermined interval from the reflecting sheet, the diffusing-guiding plate diffusing in a layer thereof the illumination light incident from the reflecting sheet; and
an optical-function-sheet layered body that is combined with the diffusing-guiding plate, that includes a plurality of laminated optical function sheets, and that guides the illumination light to the transmissive liquid crystal panel;
wherein a wiring pattern is disposed in direct contact with surfaces of the light source substrates at a first side of the light source substrates that is furthest from the light-emitting elements, and a heat-dissipating pattern is disposed in direct contact with surfaces of the light source substrates at a second side of the light source substrates, the second side being furthest from the wiring pattern.

2. The backlight device according to claim 1 , wherein each light source substrate is a glass epoxy substrate.

3. The backlight device according to claim 1 , wherein the wiring pattern is connected to a land that is disposed at the surface of each light source substrate at said second side through a through hole.

4. The backlight device according to claim 3 , wherein a connector or a harness is mounted to the surface of each light source substrate at said first side of the corresponding light source substrate.

5. A backlight device that supplies illumination light to a transmissive liquid crystal panel, the backlight device comprising:
a plurality of light source substrates having a plurality of light-emitting elements for emitting the illumination light;
a reflecting sheet having a first surface, a second surface, and a plurality of openings, the first surface having the plurality of light source substrates provided thereon, wherein the plurality of light source substrates are attached to and held by the first surface of the reflecting sheet, the second surface being disposed opposite to the first surface and reflecting the illumination light emitted from the plurality of light-emitting elements, the openings connecting the first and second surfaces and being disposed in correspondence with the light-emitting elements so as to allow the light-emitting elements to be exposed from the second surface;
a diffusing-guiding plate provided so as to directly face the second surface of the reflecting sheet at a predetermined distance from the second surface, the diffusing-guiding plate diffusing the illumination light emitted from the light-emitting elements and the illumination light incident from the second surface of the reflecting sheet in an interior of the diffusing-guiding plate; and
an optical-function-sheet layered body that is combined with the diffusing-guiding plate, that includes a plurality of laminated optical function sheets, and that guides the illumination light to the transmissive liquid crystal panel;
wherein a wiring pattern is disposed in direct contact with surfaces of the light source substrates at a first side of the light source substrates that is furthest from the light-emitting elements, and a heat-dissipating pattern is disposed in direct contact with surfaces of the light source substrates at a second side of the light source substrates that is opposite the first side.

6. A liquid crystal display device comprising:
a transmissive liquid crystal panel; and
a backlight device that illuminates the transmissive liquid crystal panel from a rear surface side thereof,
wherein,
the backlight device includes a plurality of light source substrates having a plurality of light-emitting elements for emitting illumination light,
a reflecting sheet having the plurality of light source substrates mounted directly to one surface of the reflecting sheet, the reflecting sheet having an opening formed at a location in correspondence with the light-emitting elements mounted to the light source substrates, the reflecting sheet allowing the light-emitting elements to be exposed at another surface of the reflecting sheet from the opening, and reflecting the illumination light from the light-emitting elements by said another surface,
a diffusing-guiding plate facing said another surface side of the reflecting sheet at a predetermined interval from the reflecting sheet, the diffusing-guiding plate diffusing in a layer thereof the illumination light incident from the reflecting sheet, and
an optical-function-sheet layered body that is combined with the diffusing-guiding plate, that includes a plurality of laminated optical function sheets, and that guides the illumination light to the transmissive liquid crystal panel;
wherein a wiring pattern is disposed in direct contact with surfaces of the light source substrates at a first side of the light source substrates that is furthest from the light-emitting elements, and a heat-dissipating pattern is disposed in direct contact with surfaces of the light source substrates at a second side of the light source substrates, the second side being furthest from the wiring pattern.

7. The liquid crystal display device according to claim 6 , wherein the wiring pattern is connected to a land that is disposed at the surface of each light source substrate at said second side, through a through hole.

8. A liquid crystal display device comprising:
a transmissive liquid crystal panel; and
a backlight device that supplies illumination light to the transmissive liquid crystal panel, wherein,
the backlight device includes a plurality of light source substrates having a plurality of light-emitting elements for emitting the illumination light,
a reflecting sheet having a first surface, a second surface, and a plurality of openings, the first surface having the plurality of light source substrates provided thereon, wherein the plurality of light source substrates are attached to and held by the first surface of the reflecting sheet, the second surface being disposed opposite to the first surface and reflecting the illumination light emitted from the plurality of light-emitting elements, the openings connecting the first and second surfaces and being disposed in correspondence with the light-emitting elements so as to allow the light-emitting elements to be exposed from the second surface,
a diffusing-guiding plate provided so as to directly face the second surface of the reflecting sheet at a predetermined distance from the second surface, the diffusing-guiding plate diffusing the illumination light emitted from the light-emitting elements and the illumination light incident from the reflecting sheet in an interior of the diffusing-guiding plate, and
an optical-function-sheet layered body that is combined with the diffusing-guiding plate, that includes a plurality of laminated optical function sheets, and that guides the illumination light to the transmissive liquid crystal panel;
wherein a wiring pattern is disposed in direct contact with surfaces of the light source substr

Assignees

• Shibata Hirokazu
• Ode Tatsuya
• Sony Corp

Inventors

• Shibata Hirokazu
• Ode Tatsuya

Classifications

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133608

  including particular frames or supporting means · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title