Sharp Kabushiki Kaisha Corporation

Nobuhiro Kasai

Hiroyuki Moriwaki

Koji Yabuta

Shunsei Fukuchi

Manabu Abiru

A display deviceincludes a display panel, a light source row, a light guide plate, a chassisand a recess portionthat is fitted the chassis. The light guide plateincludes a positioning projection portionthat is fitted to the recess portion. The positioning projection portionprojects outwardly from a side edge surfaceof the light guide plate. The positioning projection portionhas a projection, and among rays of light emitted from an end light sourceX included in the light source rowand entering the light guide plate through a light entrance surface, narrow-angle light Ldirected outward at an angle &#x3b1; (a critical angle &#x3b8;c) with respect to an optical axis Lenters the projection. The positioning projection portionincludes a first edge surfaceand a second edge surface. The first edge surfaceis parallel to a side edge surfaceand the narrow-angle light Lreaches the first edge surface. The second edge surfaceis between the side edge surfaceand the first end surfaceand is inclined such that an external angle &#x3b2; between the first edge surfaceand the second edge surfaceis equal to or smaller than the critical angle &#x3b8;c.

Display device and television device

A liquid crystal display deviceincludes an LED, a liquid crystal panel, a light guide plateincluding a light exit surface, an opposing surface, and a light entrance surface, a chassishaving a bottom plate, a frame, an LED board, a heat dissipation memberhaving heat dissipation properties, and a fixing screw. The heat dissipation memberincludes a contact portionbeing in contact with an end portion of the opposing surfaceon a light entrance surfaceside, a bottom portionarranged on and along the bottom plateand a stand-up portionprojecting from the bottom portiontoward the liquid crystal panel. The LED boardis mounted on a surface of the stand-up portion. The fixing screwis passed through the contact portionand a tip portion thereof is fixed in the opposing surfacesuch that the stand-up portionand the LED boardare fixed relative to the light guide plate

Display device comprising a heat dissipation member having a stand-up portion projecting toward a display panel and television device

A backlight device includes: a flat chassis member; a light guide plate stacked on the chassis member; and a light source member attached to the chassis member so as to face a light incident face that is located at a side face of the light guide plate. The light guide plate has, at at least one side face adjacent to the light incident face, a convex part protruding outwardly of the side face, the chassis member has a protruding part to sandwich the convex part, and at least a part of the protruding part is covered with an elastic member that presses the convex part toward the light source member.

Backlight device and liquid crystal display including the same

A backlight unit includes: an LED; a chassis including a bottom plate provided on a side opposite to a light exit side; and a first reflection sheet. The first reflection sheet includes a quadrangular bottom portion extending along the bottom plate, and two raised portions raised from each of two adjacent sides of the quadrangular bottom portion toward the light exit side, a joint provided between two adjacent side edges of the raised portions. The side edge of a first one of the raised portions includes a facing portion facing the side edge of a second one of the raised portions in a direction in which the first one of the raised portions is raised from the quadrangular bottom portion, and the first one of the raised portions and facing portion bulge toward the light exit side to have an arched shape.

Lighting device, display device and television receiver

The invention is intended to provide a lighting device that shortens time required to obtain peak brightness. A backlight unitaccording to the invention includes: cold cathode tubesas a light source; a chassishousing the cold cathode tubes; a reflection sheetdisposed within the chassisand reflecting light; and a heat insulatordisposed between the chassisand the reflection sheet. Because the heat insulatoris disposes between the chassisand the reflection sheet, heat in the chassisis less likely to escape to the outside. Therefore, the temperature inside the chassiscan be efficiently increased with the heat generated by the cold cathode tubes

Disclosed are an illumination device to be located immediately below an object to be illuminated, wherein a plurality of point-like light sources are arranged, and a display device provided with the illumination device. Even in a structure wherein the light emitted from point-like light sources is diffused and planarly emitted, in order to provide an illumination device which can uniformly and planarly emit the light without reducing the light intensity at the overlapped portion of the light emitted from the point-like light sources, point-like light sources (LED light sources) each diffusing the light to be emitted in a square-shaped light emission distribution, and an illumination device (LED backlight device) wherein the point-like light sources are arranged in a planar manner so that the square-shaped light emission distributions of the light diffused by the point-like light sources are overlapped in parallel.

Illumination device, display device, television receiving device, and LED light source utilizing square shaped emission distributions

In a lighting deviceaccording to the present invention, a first boardand a second boardon which a plurality of light sourcesare mounted are arranged in a first board arrangement areaand a second board arrangement areaof a chassis, respectively, in respective predetermined orientations. The first boardincludes a first board-side interlock portioninterlocked with a first chassis-side interlock portionprovided in the first board arrangement area, and the second boardincludes a second board-side interlock portioninterlocked with a second chassis-side interlock portionprovided in the second board arrangement area. In arranging the first boardin the second board arrangement area, the first board-side interlock portionis not interlocked with the second chassis-side interlock portion

A frame, a light source device and a display device that are capable of preventing a wrinkle or distortion from occurring in optical members. The frame includes a first holding face () opposed to a border portion on one face in a thickness direction of a first optical member (&#x3b2;) having a plate shape that includes a female engagement portion (&#x3b2;) disposed on its border portion, a male engagement portion (&#x3b4;) having a convex shape that is arranged to be engaged with the female engagement portion (&#x3b2;), and a second holding face () opposed to an end face in a plane direction of a second optical member () having a sheet shape or a film shape that is smaller than the first optical member.

Frame, light source device, display device, and television receiver

A backlight unit () for a display device () provided with a liquid crystal display panel () comprises a chassis (), a diffusion plate () supported by the chassis, and point-like light sources supported by mounting substrates () provided on the chassis. The point-like light sources comprise LEDs () mounted on the mounting substrates. The mounting substrates are connected to each other by connectors () to form rows () of the mounting substrates, and the rows () are arranged side by side. The rows of the mounting substrates each consist of two, short and long mounting substrates, and the rows are arranged in a mixed state in such a manner that each row consisting of the two, short and long mounting substrates is reversed with respect to each other. As a result, the positions of the connectors are not aligned rectilinearly in the direction in which the rows of the mounting substrate are arranged.

Illumination device, display device, and television receiver

An illuminating device includes a hot-cathode fluorescent tube (discharge tube) and a light emitting surface that emits light from the hot-cathode fluorescent tube. An auxiliary light emitting portion is provided in the vicinity of a non-lighting region of the hot-cathode fluorescent tube. The auxiliary light emitting portion includes an optical fiber having an incident portion for receiving light from the hot-cathode fluorescent tube, and a light guide plate that receives light from the optical fiber and emits the incident light toward the light emitting surface.

Display backlight device with auxiliary light emitting element

Provided is a backlight device which can suppress a damage of a display panel or a diffusion sheet while suppressing the size of the device. The backlight device () includes: a diffusion sheet (); and a support member () having a support plane () for supporting the diffusion sheet and arranged below the diffusion sheet. The diffusion sheet has a center of gravity (G) set at the arrow C direction, i.e., at the side opposite to a liquid crystal display panel () as compared to a contact position (tip end (P)) between the lower surface () of the diffusion sheet and the support plane of the support member when the diffusion sheet is not warped.

Backlight device, display device, and television receiver

A light source device and a display device in which wrinkle or warpage of sheet-shaped or film-shaped optical members is prevented or minimized. A light source device () includes sheet-shaped or film-shaped optical members () arranged to control properties of light that passes therethrough and a chassis () to which the sheet-shaped or film-shaped optical members () are attached, the chassis () includes a plurality of fitting protrusions (hooks) () that are vertically movable and are pushed upward by pushing mechanisms in a normal usage state, a plurality of fitting holes () each having a through hole shape are disposed adjacent to upper sides of the sheet-shaped or film-shaped optical members () in the normal usage state, and the optical members () are hung on the fitting protrusions () of the chassis () in the fitting holes ().

Light source device and display device

It is an object of the invention to display white and black colors simultaneously in addition to a color display, in a birefringence control type liquid crystal display device using a high polymer film in optical compensation plate. In the birefringence control type liquid crystal display device using a high polymer film in the optical compensation plate, the product d.DELTA.n of a cell gap d and a refractive index anisotropy .DELTA.n of the liquid crystal cell is set in a range of 1700 nm to 1950 nm, the difference (d.DELTA.n-d.sub.R n.sub.R) of the d.DELTA.n of the liquid crystal cell and the product d.sub.R .DELTA.n.sub.R of a refractive index anisotropy .DELTA.n.sub.R and a film thickness d.sub.R of the phase difference plate is set in a range of 750 nm to 850 nm, the crossing angle of the orientation direction of the upper side of the liquid crystal layer and the slow axis of the phase difference plate is set in a range of 80.degree. to 100.degree., the crossing angle of the absorption axes of the upper and lower polarizers is set in a range of 50.degree. to 70.degree., and the crossing angle of the absorption axis of each polarizer and the orientation direction of liquid crystal molecules adjacent thereto is set in a range of 30.degree. to 50.degree..

Birefringence control type liquid crystal display device

A touch-sensitive panel for outputting data corresponding to pressed positions on a touching plate included in the touch-sensitive panel and for sending the output data to a display device includes a plurality of first electrodes arranged on the touching plate, a plurality of second electrodes being opposed to the plurality of first electrodes and being capable of conducting to the plurality of first electrodes located at the pressed positions when the touching plate is pressed, a first connecting plate for connecting the plurality of first electrodes to the display device, a second connecting plate for connecting the plurality of second electrodes to the display device, an anisotropic electrically conductive bonding layer having a plurality of through holes and arranged on the first connecting plate, and a conductive layer including conductive particles, the conductive layer being laid between the plurality of first electrodes and the anisotropic electrically conductive bonding layer, the conductive particles being in the through holes.

Growing community of inventors

Osaka, Japan

Nobuhiro Kasai