Sharp Kabushiki Kaisha Corporation

Japan Aviation Electronics Industry, Limited

Yoshiki Takata

Kenichi Iwamoto

Takaaki Kudo

Naofumi Ikenaga

Tatsuya Kudari

Hiroki Azuma

Katsuaki Yamada

Kentaroh Aoki

Toshihide Tsubata

Shigeaki Mizushima

Mitsuaki Hirata

Mitsuhiro Shigeta

Naoshi Yamada

Nobuhiko Nakai

Yusuke Ota

Yuhsuke Ohta

A display device properly corrects chromaticity of display images with achieving high brightness. A liquid crystal display deviceincludes a liquid crystal paneland a backlight unit. The liquid crystal display deviceincludes a pair of boardsand a liquid crystal layerformed of liquid crystals that change their optical characteristics by implication of an electric field. The backlight unitexits light toward the liquid crystal panel. One of the boardsof the liquid crystal panelincludes a color filterincluding color portions R, G, B, Y each in red, green, blue, yellow. The backlight unitincludes LEDsas a light source and each of the LEDs includes an LED chipas a light emission source and a phosphor that is excited by light from the LED chipand emits light. The phosphor includes at least a YAG-based phosphor.

Display device and television receiver

It is an object of the present invention to maintain high brightness of output light while ensuring sufficient color reproducibility in a liquid crystal display device. A liquid crystal display deviceor' according to the present invention includes a backlight deviceorand a liquid crystal panel. The backlight unitorincludes LEDsoras light sources. The backlight unitorirradiates the liquid crystal panelwith light. The liquid crystal panelincludes a pair of substratesand, and a liquid crystal layer. The CF substrateof the liquid crystal panelincludes a color filter. The color filterincludes a plurality of the respective color sections R, G, B, and Y that exhibit the colors of red, green, blue, and yellow, respectively. The color filteris configured such that the chromaticity of a blue color of output light obtained by passing light from the LEDsorthrough the color sections R, G, B, and Y in the color filterlies outside a common region Aof a NTSC chromaticity region Aaccording to a NTSC standard and a EBU chromaticity region Aaccording to a EBU standard in both a CIE1931 chromaticity diagram and a CIE1976 chromaticity diagram.

It is an object of present invention to improve wiring workability in a lighting device and to prevent the entry of dust or the like into the device. A backlight unit according to the present technology includes a chassis having hole portions, LEDs housed in the chassis as light sources, relaying and connecting part electrically connected to the LEDs from outside the chassis through the hole portion and relaying electric power supply to the LEDs, and a covering member covering a clearance between the hole portions and the relaying and connecting parts inserted therethrough.

Lighting device, display device and television device

A lighting deviceincludes a light source, a chassishousing the light sourceand an optical memberprovided to face the light source. The optical memberincludes a light source overlapping portion DN that overlaps a light source installation area of the chassiswhere the light sourceis arranged and an empty area overlapping portion DN that overlaps an empty area LN of the chassiswhere no light sourceis arranged. A light reflecting portionis formed on at least the light source overlapping portion DA such that light reflectance of the light source overlapping portion DA is relatively higher than that of the empty area overlapping portion DN. A color adjustment portionis formed on the optical memberto adjust color of the light source overlapping portion DA and the empty area overlapping portion DN.

Lighting device, display device and television receiver

An object is to improve a reliability of an electrical connection in a lighting device. A backlight unitin accordance with the present invention is provided with an LED boardwhich has an LEDserving as a light source and is formed in an elongated shape, a chassisin which the LED boardis accommodated, a light guide memberin which an end portion is arranged opposite to the LEDof the LED board, and a connectormounted to the chassisand configured to establish electrical connection with an external device, the LED boardis provided with a terminalwhich is electrically connected to the LED, and the connectorincludes a connection terminalbeing in contact with the terminalof the LED boardand slidable along a long-side direction of the LED boardand relative to the terminalof the LED board

To improve a workability in assembling and disassembling of parts of a lighting device. A backlight unitincludes an LED boardhaving LEDs, a chassis, a light guide memberhaving an end portion arranged to face the LEDs, a power supply boardarranged outside the chassisand supplying drive power to the LEDs, and a connectormounted to the chassisand supplying power between the power supply boardand the LEDs. The connectorincludes an LED board supporting portionthat supports the LED board, a power supply board supporting portionhaving a plate surface along which the power supply boardis inserted into and removed from and that supports the inserted power supply board, and a connection terminalthat comes in contact with the power supply boardwith allowing relative slide in an inserting and removing direction of the power supply board

A display deviceof the present invention includes a relay connectorconfigured to relay power supply from the power boardmounted to a chassisto a discharge tube. The relay connectorincludes a holderand a relay terminal. The holder has insulation properties and is mounted to the chassis. The relay terminalis electrically connected to the power boardand the discharge tube, and attached to the holder. The relay terminal includes a pair of flexible portionsthat hold the power board therebetween and are electrically connected to the power board. The flexible portionsare formed such that the longitudinal directions thereof cross the longitudinal direction of the discharge tube

Lighting device, relay connector, display device and television receiver

In a power board, relay terminals penetrate a circuit board through fitting holes, and are connected to output terminals. The fitting holes are thus formed as through holes on the circuit board, and thereby on-board connectors provided for connection to the relay terminals on a chassis can be arranged on the back surface of the circuit board on the opposite side of the chassis. Electronic components free from restriction of the positional relationship with the chassis can be mounted on the back surface of the circuit board, as are the on-board connectors.

Power board, on-board connector, lighting device, display device and television receiver

A lighting deviceincludes at least one point light source, an optical memberprovided on a light output side of the lighting devicefrom the point light source. The optical memberis formed of a member having a substantially uniform light reflectance. A first light reflecting portionis formed on a portion of the optical memberthat overlaps the point light source, and the first light reflecting portionreflects light from the point light source. A second light reflecting portionis provided to reflect the light that is reflected by the first light reflecting portionto be directed to the first light reflecting portion

In a discharge tube, a conductive ferrule is provided on an end portion of a glass tube. The ferrule includes a body that is to be mounted to the outer circumference of the glass tube and has a contact portion to be electrically conductively fixed to a relay connector (or a bearing device). Further included is a conductive portion that extends from the body so as to have elastic contact with an outer lead. The outer lead will not be under load due to the weight of the discharge tube, but the conductive portion solely has elastic contact therewith. Thus, stress concentration on the outer lead can be prevented.

Discharge tube, ferrule, lighting device, display device and television receiver

A chassis assembly comprises a chassisand lamp clips. The chassishas mounting holesto. Each lamp clipincludes a main bodyto be mounted to the chassis, a lamp gripping portionsprovided on the main bodyso as to grip cold cathode tubes, and mounting portionstoprotruding from the main bodytoward the chassisside. The mounting portionstoare to be inserted in the respective mounting holesto. Rims of the mounting holestoare sandwiched between the main bodyand the respective mounting portionsto. Three mounting portionstoand three mounting holestoare provided in relative positions so as to restrict mounting of the lamp clipto the chassisin an orientation other than a predefined orientation.

Chassis assembly, illumination device, display device, and television receiver apparatus

A lighting device includes a light source lamp, and a light-diffusing layer including a diffusing plate or a diffusing sheet, the light source lamp including a folded portion (curved portion), such as U-shaped tube, and the lighting device for display devices having any of, or a combination of: the folded portion of the light source lamp is covered with a lamp frame; an optical member provided with a light-reducing or light-shielding treatment is around the folded portion of the light source lamp; the folded portion of the light source lamp is outside an effective display region; the folded portion of the light source lamp includes a member reducing or shielding light; and a reflective member with a light-reducing treatment around the folded portion of the light source lamp. As a result, at least part of light generated from the curved portion of the light source lamp is reduced or shielded.

Lighting device for display devices, liquid crystal display device, and light source lamp

A lamp holding apparatus includes a mounting plate having a pair of locking portions protruding to a base side. The locking portion is inserted into a mounting hole provided at the base and capable of being locked to a peripheral edge on its back side. Abutting portions, which protrude to the base side and abut the base at the time of mounting, are provided on a bottom surface of the mounting plate that is an opposing surface to the base. The abutting portions are provided at three spots with one of the locking portions interposed therebetween. At the time of mounting, the abutting portions abut the base, and the mounting plate is elastically deformed to be warped, whereby the locking surface of the locking portion is kept locked to a peripheral edge of a back side of the mounting hole by its elastic force.

Lamp holding tool, lighting device for display device using the same, display device using the same and liquid crystal display device using lighting device for display device

A lamp holding apparatus for mounting a lamp to a lamp mounting member includes a mounting plate provided with a locking portion which protrudes to a base side, inserted into a mounting hole provided at the base and is lockable to a peripheral edge of a back side thereof. The mounting plate is provided with a pin which protrudes to an opposite side from the base side and is capable of being gripped by an operator at a time of being attached to and detached from the base. The locking portion is disposed at a position corresponding to a back side of the pin. As a result, when the locking portion is inserted into the mounting hole while gripping the pin, both the locking portion and the mounting hole are easily positioned. Thus, at a time of insertion, bending forces are reduced.

Lamp holding apparatus, backlight device for display device including same, display device including same and liquid crystal display device including backlight device for display device

Discharge tubes, each of which includes a glass tube and a ferrule that has a substantially cylindrical shape and is fitted to each end portion of the glass tube, are supported by a plurality of pairs of relay connectors (or supporting members) provided on the front side of a chassis having substantially a plate-shaped configuration. When a discharge tube is supported by relay connectors, stoppers provided on the relay connectors lock the ferrules so that axial movement of the discharge tube relative to the relay connectors is restricted.

Growing community of inventors

Suzuka, Japan

Yoshiki Takata