Abstract: A lighting device of higher heat radiation performance is provided. A lighting device 21 includes: a light guide plate 31 having an end surface 33 as a light entrance surface; a base 40 having an attachment surface 41 that faces the end surface 33 of the light guide plate 31; an LED board 35 having a light emitting surface and provided on the attachment surface 41 such that the light emitting surface faces the end surface 33 of the light guide plate 31; and a pair of heat conduction walls 42 and 43 each arranged on either side of the LED board 35 on the attachment surface 41 of the base 40 and conducting heat generated from the LED board 35 to the base 40. In the lighting device 21, the heat generated form the LED board 35 is conducted to the base side via the heat conduction walls 42 and 43 to be radiated. This enhances heat radiation performance of the LED board 35 that is a heat generation source.

Abstract: In an edge-light type lighting device, expansion or contraction of the light guide plate is eliminated without bending or warping, and light sources and light entrance surfaces are not contacted with each other and not damaged. A backlight unit 24 includes an LED board 30, an LED light source 28 on a surface of the board 30, a plate-shaped light guide plate 20 having a light entrance surfaces 20a that are opposite side surfaces thereof and provided such that each entrance surface 20a faces the LED light source 28 on the LED board 30, and a holding member 19 provided to hold the LED board 30 and the light guide plate 20 in a thickness direction thereof. The holding member 19 includes a deformation allowance portion 36a that allows the guide plate 20 to be deformed in a planar direction thereof and a restriction portion 36b configured to restrict contact between the LED light source 28 and the entrance surface 20a of the guide plate 20.

Abstract: In a lighting device, uneven brightness may be suppressed at low cost. A backlight unit 12 includes: an LED 17; a chassis 14 including a bottom plate 14a provided on a side opposite to a light exit side relative to the LED 17, the chassis 14 housing the LED 17; and a first reflection sheet 22 reflecting light. The first reflection sheet 22 includes a quadrangular bottom 24 extending along the bottom plate 14a, and two raised portions 25 and 26 each of which is raised from each of adjacent two sides of the bottom 24 toward the light exit side, a joint J provided between adjacent two side edges 25a and 26b of the raised portions 25 and 26.

Abstract: An LED package (PG) includes: an LED chip (11); and a support base (15) which has a bottom surface (15B) and an inclined surface (15S) that is inclined with respect to the bottom surface (15B), and which supports the LED chip (11) at the inclined surface (15S).

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: 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 backlight unit (49) of a display device (69) including a liquid crystal display panel (59) includes a chassis (41), a diffusion plate (43) which is supported by the chassis, and a point light source for irradiating the diffusion plate with light. The point light source includes an LED (22) mounted on a mounting substrate (21). A plurality of the LEDs are provided and respectively covered with diffusion lenses (24). Optical axes (OA) of the diffusion lenses are tilted relative to the diffusion plate, and the diffusion lenses having different tilts of the optical axes exist on the chassis in a mixed manner. The diffusion lenses having the optical axes which tilt in opposite directions are paired, and the pairs are arranged in a matrix.

Abstract: A backlight unit (49) of a display device (69) provided with a liquid crystal display panel (59) includes: a chassis (41); a diffusion plate (43) supported by the chassis; light emitting modules (MJ) arranged on mounting substrates (21) on the chassis, the light emitting module being provided with light emitting elements (22) and diffusion lenses (24) which cover the light emitting elements (22); and a reflective sheet (42) for totally covering the chassis and reflecting the light, which is emitted from the light emitting modules (MJ), toward the diffusion plate. A cover section (42C) is formed on the reflective sheet, and the cover section (42C) receives and covers a connector (25) that electrically connects the mounting substrates to each other.

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: The present invention provides a lighting device configured to produce light with a substantially averaged overall color. The lighting device 12 of the present invention includes a plurality of point light sources 17 and a chassis 14 that houses the point light sources 17. The point light sources 17 are classified in two or more color ranges A, B, and C according to colors of light. Each color range has a range defined by a square with sides each having a length of 0.01 in the EIC 1931 color space chromaticity diagram. The point light sources 17 in the different color ranges A, B, and C are housed in the chassis 14.

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: In a case where (i) a direction in which exit surfaces (2a) of light sources (2) face corresponding entrance surfaces (1d) of light guides (1) is assumed to be a first direction and (ii) a direction perpendicular to the first direction on the a substrate (4) is assumed to be a second direction, each of reflecting sections (7) is provided in at least part of a strip area, on the substrate (4), between the exit surfaces (2a) and the entrance surfaces (1d), the strip area having (i) a distance, equal to a distance between the exit surface (2a) and the entrance surface (1d), in the first direction, and (ii) a second distance in the second direction.

Abstract: The present invention relates to a backlight unit 12 including a light guide plate 18 that receives rays of light from an LED 16 and outputs the rays of light from a light exit surface 36. The backlight unit 12 includes a board mounting portion 30, a clip 23 and a holding member 47. The board mounting portion is provided at an end of the light guide plate 18 to be mounted on an LED board 17. The clip 23 fixes the board mounting portion 30 to the LED board 17. The holding member 47 is fixed collectively with the clip 23 to improve rigidity of the board mounting portion 30.

Abstract: A backlight unit 12 includes a light guide plate 18, an LED 16, an LED board 17, a light exit portion 31, a board mounting portion 36, a clip 23 and a plate spring 47. The light guide plate 18 and the LED 16 extend in the front-to-rear direction. The rear part of the light guide plate 18 is fixed to the LED board 17 with a front part of the light guide plate 18 separating from the LED board 17. The light exit portion 31 is provided at a front part of the light guide plate 18. The light exit portion 31 has a light exit surface 36 from which light from the LED 16 exits and travel toward an optical member 15. The board-mounting portion 30 is provided at a rear part of the light guide plate 18 and mounted to the LED board 17. The clip 23 fixes the board-mounting portion 30 to the LED board 17. The plate spring 47 pushes a rear part of the board-mounting portion 30 located more to the rear than the clip 23 such that the rear part separates from the LED board 17.

Abstract: Each of first reflecting sheets (3) is provided so as to cover that opposite surface of a corresponding lightguide (5) which is opposite to a light exit surface (5c) of the corresponding lightguide (5). Each of second reflecting sheets (4) is provided, on that opposite surface of a corresponding first reflecting sheet (3) which is opposite to a surface thereof facing a corresponding lightguide 5, over a corresponding first gap (1), each of which first gaps (1) is defined between adjacent two of the lightguides (5) that do not to overlap each other. Each of the second reflecting sheets (4) covers a region where no first reflecting sheet (3) is provided in the corresponding first gap (1), and extended over the adjacent two of the lightguides (5).

Abstract: An illuminating device (3) includes a hot-cathode fluorescent tube (discharge tube) (20) and a light emitting surface (15a) that emits light from the hot-cathode fluorescent tube (20). An auxiliary light source portion (21) is provided in the vicinity of a non-lighting region (B) of the hot-cathode fluorescent tube (20). The auxiliary light source portion (21) includes an optical fiber (23) having an incident portion (23a) for receiving light from the hot-cathode fluorescent tube (20), and a light guide plate (22) that receives light from the optical fiber (23) and emits the incident light toward the light emitting surface (15a).

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: A light source device and a display device capable of preventing or minimizing occurrence of warpage, bend or distortion in a thin-plate-shaped optical member. A light source device (2) includes a chassis (11), a light source (22) that is disposed on a front side of the chassis (11), an optical member (24) having a thin plate shape that is disposed on a front side of the light source (22) and arranged to control properties of light the light source (22) emits, and a boss (114) that includes a rotation mechanism, is disposed in a protruding manner along a side of the chassis (11) that is a lower side when the thin-plate-shaped optical member (24) is in a normal usage state, and is arranged to support at least one side of the optical member (24) that is a lower side when the optical member (24) is in the normal usage state.

Abstract: An air cleaning system for an engine includes a main air cleaner for supplying cleaned air to an intake system of the engine and a sub-air cleaner for supplying cleaned air to an exhaust system of the engine. The main air cleaner includes a main air cleaner housing divided into a dirty air chamber and a clean air chamber by a first air cleaning element. The sub-air cleaner is disposed in the dirty air chamber, and has its own second air cleaning element, physically separated from the first air cleaning element.