Abstract: A display device 10 includes a display panel 11, a light source row 170, a light guide plate 16, a chassis 14 and a recess portion 134b that is fitted the chassis 14. The light guide plate 16 includes a positioning projection portion 160 that is fitted to the recess portion 134b. The positioning projection portion 160 projects outwardly from a side edge surface 16e of the light guide plate 16. The positioning projection portion 160 has a projection, and among rays of light emitted from an end light source 17X included in the light source row 170 and entering the light guide plate through a light entrance surface 16b, narrow-angle light L2 directed outward at an angle ? (a critical angle ?c) with respect to an optical axis L1 enters the projection. The positioning projection portion 160 includes a first edge surface 161 and a second edge surface 162. The first edge surface 161 is parallel to a side edge surface 16e and the narrow-angle light L2 reaches the first edge surface 161.

Abstract: A liquid crystal display device 10 includes an LED 17, a liquid crystal panel 11, a light guide plate 16 including a light exit surface 16a, an opposing surface 16c, and a light entrance surface 16b, a chassis 14 having a bottom plate 14a, a frame 13, an LED board 18, a heat dissipation member 19 having heat dissipation properties, and a fixing screw 40. The heat dissipation member 19 includes a contact portion 19c being in contact with an end portion of the opposing surface 16c on a light entrance surface 16b side, a bottom portion 19b arranged on and along the bottom plate 14a and a stand-up portion 19a projecting from the bottom portion 19b toward the liquid crystal panel 11. The LED board 18 is mounted on a surface of the stand-up portion 19a. The fixing screw 40 is passed through the contact portion 19c and a tip portion thereof is fixed in the opposing surface 16c such that the stand-up portion 19a and the LED board 18 are fixed relative to the light guide plate 16.

Abstract: 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.

Abstract: A display device 10 includes a display panel 11, a light source row 170, a light guide plate 16, a chassis 14 and a recess portion 134b that is fitted the chassis 14. The light guide plate 16 includes a positioning projection portion 160 that is fitted to the recess portion 134b. The positioning projection portion 160 projects outwardly from a side edge surface 16e of the light guide plate 16. The positioning projection portion 160 has a projection, and among rays of light emitted from an end light source 17X included in the light source row 170 and entering the light guide plate through a light entrance surface 16b, narrow-angle light L2 directed outward at an angle ? (a critical angle ?c) with respect to an optical axis L1 travels into the projection. The positioning projection portion 160 includes a first edge surface 161 and a second edge surface 162. The first edge surface 161 is parallel to a side edge surface 16e and the narrow-angle light L2 does not reach the first edge surface 161.

Abstract: A liquid crystal display device 10 includes an LED 17, a liquid crystal panel 11, a light guide plate 16 including at least one side-surface as a light entrance surface 16b, a chassis 14 having a bottom plate 14a, a frame 13, an LED board 18, a heat dissipation member 19 having heat dissipation properties, and a fixing screw 40. The frame 13 and the chassis 14 sandwich the liquid crystal panel 11, the LED 17, and the light guide plate 16 therebetween. The heat dissipation member 19 includes a bottom portion 19b arranged on the bottom plate 14a and a stand-up portion 19a projecting from the bottom portion 19b toward the liquid crystal panel 11. The LED board 18 is mounted on a surface of the stand-up portion 19a. The fixing screw 40 is passed through the stand-up portion 19a and the LED board 18 and a tip portion thereof is fixed in the light entrance surface 16b so that the fixing screw fixes the stand-up portion and the LED board 18 to the light guide plate 16.

Abstract: A display device 10 includes a display panel 11, a light source row 170, a light guide plate 16, a chassis 14 and a recess portion 134b that is fitted the chassis 14. The light guide plate 16 includes a positioning projection portion 160 that is fitted to the recess portion 134b. The positioning projection portion 160 projects outwardly from a side edge surface 16e of the light guide plate 16. The positioning projection portion 160 has a projection, and among rays of light emitted from an end light source 17X included in the light source row 170 and entering the light guide plate through a light entrance surface 16b, narrow-angle light L2 directed outward at an angle ? (a critical angle ?c) with respect to an optical axis L1 enters the projection. The positioning projection portion 160 includes a first edge surface 161 and a second edge surface 162. The first edge surface 161 is parallel to a side edge surface 16e and the narrow-angle light L2 reaches the first edge surface 161.

Abstract: A liquid crystal display device 10 includes an LED 17, a liquid crystal panel 11, a light guide plate 16 including a light exit surface 16a, an opposing surface 16c, and a light entrance surface 16b, a chassis 14 having a bottom plate 14a, a frame 13, an LED board 18, a heat dissipation member 19 having heat dissipation properties, and a fixing screw 40. The heat dissipation member 19 includes a contact portion 19c being in contact with an end portion of the opposing surface 16c on alight entrance surface 16b side, a bottom portion 19b arranged on and along the bottom plate 14a and a stand-up portion 19a projecting from the bottom portion 19b toward the liquid crystal panel 11. The LED board 18 is mounted on a surface of the stand-up portion 19a. The fixing screw 40 is passed through the contact portion 19c and a tip portion thereof is fixed in the opposing surface 16c such that the stand-up portion 19a and the LED board 18 are fixed relative to the light guide plate 16.

Abstract: 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.

Abstract: The invention is intended to provide a lighting device that shortens time required to obtain peak brightness. A backlight unit 16 according to the invention includes: cold cathode tubes 22 as a light source; a chassis 18 housing the cold cathode tubes 22; a reflection sheet 21 disposed within the chassis 18 and reflecting light; and a heat insulator 27 disposed between the chassis 18 and the reflection sheet 21. Because the heat insulator 27 is disposes between the chassis 18 and the reflection sheet 21, heat in the chassis 18 is less likely to escape to the outside. Therefore, the temperature inside the chassis 18 can be efficiently increased with the heat generated by the cold cathode tubes 22.

Abstract: 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.

Abstract: 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.

Abstract: This illumination device is provided with light sources (15) arranged in one direction along a line or side-by-side, a light-guide plate (14) which guides light incident from an incidence surface (14a) on the side circumferential surface across from the light sources (15) and emits planar illumination light from an exit surface (14b) on the front surface, a chassis (13) which covers and supports the light sources (15) and the periphery of the light-guide plate (14), a scattering pattern (18) which is formed on the back surface (14c) of the light-guide plate (14), and positioning units (14g) which are provided jutting from the side peripheral surface of the light-guide plate (14) for positioning the light-guide plate (14) by fitting with the inner surface of the chassis (13), wherein the scattering pattern (18) is provided so as to extend on the positioning units (14g).

Abstract: In a lighting device 12 according to the present invention, a first board 20a and a second board 20b on which a plurality of light sources 17 are mounted are arranged in a first board arrangement area 30a and a second board arrangement area 30b of a chassis 14, respectively, in respective predetermined orientations. The first board 20a includes a first board-side interlock portion 31a interlocked with a first chassis-side interlock portion 32a provided in the first board arrangement area 30a, and the second board 20b includes a second board-side interlock portion 31b interlocked with a second chassis-side interlock portion 32b provided in the second board arrangement area 30b. In arranging the first board 20a in the second board arrangement area 30b, the first board-side interlock portion 31a is not interlocked with the second chassis-side interlock portion 32b.

Abstract: 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 (611) opposed to a border portion on one face in a thickness direction of a first optical member (701?, 701?) having a plate shape that includes a female engagement portion (7011?, 7011?) disposed on its border portion, a male engagement portion (62?, 62?, 62?, 62?) having a convex shape that is arranged to be engaged with the female engagement portion (7011?, 7011?), and a second holding face (612a, 612b, 612c, 612d) opposed to an end face in a plane direction of a second optical member (702) having a sheet shape or a film shape that is smaller than the first optical member.

Abstract: A backlight unit (49) for a display device (69) provided with a liquid crystal display panel (59) comprises a chassis (41), a diffusion plate (43) supported by the chassis, and point-like light sources supported by mounting substrates (21) provided on the chassis. The point-like light sources comprise LEDs (22) mounted on the mounting substrates. The mounting substrates are connected to each other by connectors (25) to form rows (26) of the mounting substrates, and the rows (26) 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 (20) includes: a diffusion sheet (25); and a support member (31) having a support plane (31a) for supporting the diffusion sheet and arranged below the diffusion sheet. The diffusion sheet has a center of gravity (G1) set at the arrow C direction, i.e., at the side opposite to a liquid crystal display panel (12) as compared to a contact position (tip end (P1)) between the lower surface (25d) of the diffusion sheet and the support plane of the support member when the diffusion sheet is not warped.

Abstract: 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 (2b) includes sheet-shaped or film-shaped optical members (26a, 26b, 26c) arranged to control properties of light that passes therethrough and a chassis (11b) to which the sheet-shaped or film-shaped optical members (26a, 26b, 26c) are attached, the chassis (11b) includes a plurality of fitting protrusions (hooks) (114a, 114b, 114c) that are vertically movable and are pushed upward by pushing mechanisms in a normal usage state, a plurality of fitting holes (261) each having a through hole shape are disposed adjacent to upper sides of the sheet-shaped or film-shaped optical members (26a, 26b, 26c) in the normal usage state, and the optical members (26a, 26b, 26c) are hung on the fitting protrusions (114a, 114b, 114c) of the chassis (11b) in the fitting holes (261).

Abstract: Uneven brightness is less likely to occur in lighting devices. A lighting device includes a light source unit U, light guide blocks 31 to 35, a chassis 60, and positioning portions S. The light source unit U includes a plurality sets of light sources P arranged along a centerline Lc. Each set of light sources P is a pair of LEDs 45 disposed so as to be equally distanced from the centerline Lc and face each other. The light guide blocks 31 to 35, each provided corresponding to each one of the sets of light sources P, are disposed between the set of light sources P. The light sources have two end surfaces E in a longitudinal direction that face the LEDs 45. The chassis 60 houses the light source unit U and the light guide blocks 31 to 35. The positioning portions S position a middle portion of the respective light guide blocks 31 to 35 in the longitudinal direction on the centerline Lc.