Abstract: The illumination device includes a light source unit having a plurality of LEDs arranged in a linear shape, a light-emergent face extending to one side from the vicinity of an area straightly under the light source unit, and a first reflective body extending to the same side to which the light-emergent face extends from the vicinity of an area straightly over the light source unit, wherein the first reflection body has a first reflection face configured to get close to the light-emergent face as the first reflective body extends from the vicinity of an area straightly over the light source unit, and the light source unit is provided such that an optical axis of the LED is inclined to the first reflective face side with respect to a direction parallel to the light-emergent face.

Abstract: There is provided an illuminator comprising a plurality of light source units that include: a light guide plate; and a plurality of point light sources arranged on a lateral side of the light guide plate, each of the light source units being configured as that light introduced from the plurality of point light sources to the light guide plate is adapted to exit from a main surface of the light guide plate, wherein the plurality of light source units are radially positioned at a reference point of the base frame.

Abstract: A light emitting device comprises: a light guiding plate including two facing principal surfaces and circumferential end surfaces connecting the principal surfaces; and a point-like light source facing at least one surface of the circumferential end surfaces of the light guiding plate. One surface of the circumferential end surfaces except the surface where the light source is arranged is a light emitting surface, the thickness of the light guiding plate facing the light source is smaller than the thickness of a portion constituting the light emitting surface and is smaller than the thickness of a light emitting surface of the light source, a diffusing unit is formed on at least one of the principal surfaces; and a reflection member covering peripheries of the light source and the light guiding plate except portions constituting the light emitting surfaces of the light source and the light guiding plate is provided.

Abstract: A sidelight type spread illuminating apparatus includes a light guiding plate; a plurality of circuit boards arranged so as to face a side end face of the light guiding plate; a light source mounted on the circuit boards; and a connector that electrically connects the circuit boards adjacent to each other. The connector includes a socket and a plug that are removable therebetween. The socket and the plug are configured to be removable in a direction parallel to each mounting surface of the light sources of the circuit boards in a state that either the socket or the plug is fixed to ends of the circuit boards adjacent to each other.

Abstract: There is provided an illuminator comprising a plurality of light source units that include: a light guide plate; and a plurality of point light sources arranged on a lateral side of the light guide plate, each of the light source units being configured as that light introduced from the plurality of point light sources to the light guide plate is adapted to exit from a main surface of the light guide plate, wherein the plurality of light source units are radially positioned at a reference point of the base frame.

Abstract: A planar illumination device comprises a light guide plate, a point-like light source arranged on an incoming-light face of the light guide plate, an inner frame formed substantially in a U-shape on a top view, and an outer frame having a seat portion and side walls wherein the light guide plate is accommodated in the inner frame and mounted on the seat portion of the outer frame, while the point-like light source is arranged along the incoming-light face of the light guide plate and held between the incoming-light face and the side wall of the outer frame. At the inner frame, an elastic action portion which is elastically deformed so as to make a partial contact with the outer frame and energizes the light guide plate toward the point-like light source is provided.

Abstract: A planar illumination device comprises a light guide plate, a point-like light source arranged on an incoming-light face of the light guide plate, an inner frame formed substantially in a U-shape on a top view, and an outer frame having a seat portion and side walls wherein the light guide plate is accommodated in the inner frame and mounted on the seat portion of the outer frame, while the point-like light source is arranged along the incoming-light face of the light guide plate and held between the incoming-light face and the side wall of the outer frame. At the inner frame, an elastic action portion which is elastically deformed so as to make a partial contact with the outer frame and energizes the light guide plate toward the point-like light source is provided.

Abstract: A planar illumination device comprises a light guide plate, a point-like light source arranged on an incoming-light face of the light guide plate, an inner frame formed substantially in a U-shape on a top view, and an outer frame having a seat portion and side walls wherein the light guide plate is accommodated in the inner frame and mounted on the seat portion of the outer frame, while the point-like light source is arranged along the incoming-light face of the light guide plate and held between the incoming-light face and the side wall of the outer frame. At the inner frame, an elastic action portion which is elastically deformed so as to make a partial contact with the outer frame and energizes the light guide plate toward the point-like light source is provided.

Abstract: A spread illuminating apparatus includes: a light conductor plate having a light inlet surface and a light outlet surface; a point light source disposed at the light inlet surface of the light conductor plate; and a light diffuser sheet disposed on the light outlet surface of the light conductor plate, wherein the light diffuser sheet has one end thereof extending beyond the light inlet surface and thereby covers at least a part of the point light source, whereby light which conventionally does not enter the light conductor plate directly from the light inlet surface is adapted to impinge on the light diffuser sheet and to fall incident on the light inlet surface and is efficiently utilized. A recess may be formed at the one end of the light diffuser sheet so as to expose a part of the light exit surface of the light conductor plate.

Abstract: A planar illumination device comprises a light guide plate, a point-like light source arranged on an incoming-light face of the light guide plate, an inner frame formed substantially in a U-shape on a top view, and an outer frame having a seat portion and side walls wherein the light guide plate is accommodated in the inner frame and mounted on the seat portion of the outer frame, while the point-like light source is arranged along the incoming-light face of the light guide plate and held between the incoming-light face and the side wall of the outer frame. At the inner frame, an elastic action portion which is elastically deformed so as to make a partial contact with the outer frame and energizes the light guide plate toward the point-like light source is provided.

Abstract: A spread illuminating apparatus includes: a point light source; a light conductor plate having a prism array formed at a side surface thereof at which the point light source is disposed; a frame which houses the point light source and the light conductor plate and which includes an elastically active area to urge the light conductor plate toward the point light source; and a heat-resistant transparent spacer which is composed of an elastic layer preferably made of heat resistant silicone rubber and a non-elastic layer made of polyethylene terephthalate and which is disposed between the point light source and the prism array of the light conductor plate such that the elastic layer makes contact with the point light source and the non-elastic layer makes contact with the prism array.

Abstract: More efficient radiation of heat from a point-like light source is enabled, and thinning is promoted, while higher and more uniform brightness of a planar illumination device is accommodated. A radiation path is formed through which the heat generated from the point-like light source is transmitted to a radiator plate made of metal through an electrode terminal of the point-like light source, a land portion of a front side face of an FPC, a through hole of a conductor pattern, and a high heat-conductive resin. The radiation path for efficient radiation from a conductor pattern of the FPC to the radiator plate made of metal is extended, and direct radiation area is sufficiently ensured. Particularly even if a large-current type LED is used for the point-like light source, sufficient radiation effect can be obtained.

Abstract: A spread illuminating apparatus includes a point light source, a light conductor plate having a light inlet surface facing the point light source, and a housing frame to hold the point light source and the light conductor plate, wherein the housing frame includes an inner frame member and an outer frame member to enclose the inner frame member, the point light source is disposed at an end wall of the outer frame member, the light conductor plate is held in the inner frame member by joint mechanisms such that the light inlet surface of the light conductor plate is positioned inward of a forefront face of the inner frame member with a predetermined distance therefrom, and wherein the inner frame member is housed in the outer frame member with a predetermined constant clearance provided between the point light source and the light inlet surface of the light conductor plate.

Abstract: A planar illumination device in which workability of a filling work of a heat conduction agent is improved and a heat generated from a point-like light source is efficiently radiated so as to achieve high brightness. In a planar illumination device 1 according to the present invention, a recess portion 23 is formed on a part of a face on which a point-like light source 3 is mounted in a double-sided flexible print circuit board 10, a bottom face 22 of the recess portion 23 is made of a conductor pattern 7R on the opposite side 10R of a side 10F on which the point-like light source is mounted in the double-sided flexible print circuit board 10, and a heat conducting resin 11 is filled in a space constituted by the recess portion 23 and the mounting face 3b of the point-like light source 3. The double-sided flexible print circuit board 10 is preferably mounted on a radiator plate 5a using a heat conducting tape 12.

Abstract: In a spread illuminating apparatus including: an LED at a side surface of a light conductor plate; and an FPC having a land formed on a side thereof for mounting the LED, throughholes are formed at the land, and solder is contained at least partly in each of the throughholes, whereby the LED can be mounted solidly on the FPC with a high precision in height position from the FPC, and at the same time the heat emitted from the LED can be efficiently conducted to a conductive pattern at the rear side of the FPC through an electrode terminal of the LED and the throughholes filled with the solder composed of a metallic material having a high heat conductance.

Abstract: A spread illuminating apparatus includes LEDs as point light sources fixedly mounted on a flexible printed circuit, a light conductor plate having a light inlet surface, a light reflector plate disposed under the light conductor plate, a light absorbing member constituted by a black tape, and a sheet metal case having walls on all four sides and housing the component members described above. An end of the light reflector plate located toward the LEDs is positioned beyond the light inlet surface of the light conductor plate, and recesses are provided at the end of the light reflector plate. A black tape as a light absorbing member is disposed on the outer surface of the light reflector plate along the light inlet surface, and a light absorbing region is formed such that the black tape is exposed through the recess.

Abstract: Higher brightness of a planar lighting apparatus is promoted by improving close contact between a light-emitting face of an LED and a side end face of a light guide plate. A planar lighting apparatus 20 according to the present invention comprises a light guide plate 2 and an LED 10 arranged on a incoming-light face 3, which is a side end face of the light guide plate 2, and a incoming-light face 15 of an LED 10 has a recess portion 14a formed by the surface of a translucent resin for sealing. On the incoming-light face 3 of the light guide plate 2, a projection portion 3a correspondent to the shape of the recess portion 14a of the LED 10 is integrally formed, and the LED 10 is arranged so that the recess portion 14a is complemented by the projection portion 3a and the actual light-emitting face 15 including the recess portion 14a of the LED 10 and the incoming-light face 3 of the light guide plate 2 are brought into close contact without a gap between them.

Abstract: In a spread illuminating apparatus, at least one point light source is disposed at an end wall of an outer frame member, and a subassembly is constituted by a light conductor plate and an inner frame member via first joint means. The subassembly has interface surfaces to make contact with the end wall of the outer frame member, a light inlet face of the light conductor plate is positioned to recede from the interface surface by a predetermined dimension, the first joint means each includes a elastic member to press the light conductor plate toward the interface surfaces, and the subassembly is jointed to the outer frame member via second joint means each constituted by an elastic member to press the interface surfaces toward the end wall of the outer frame member.

Abstract: A spread illuminating apparatus includes: a light conductor plate having a light inlet surface and a light outlet surface; a point light source disposed at the light inlet surface of the light conductor plate; and a light diffuser sheet disposed on the light outlet surface of the light conductor plate, wherein the light diffuser sheet has one end thereof extending beyond the light inlet surface and thereby covers at least a part of the point light source, whereby light which conventionally does not enter the light conductor plate directly from the light inlet surface is adapted to impinge on the light diffuser sheet and to fall incident on the light inlet surface and is efficiently utilized. A recess may be formed at the one end of the light diffuser sheet so as to expose a part of the light exit surface of the light conductor plate.

Abstract: A spread illuminating apparatus includes LEDs as point light sources fixedly mounted on a flexible printed circuit, a light conductor plate having a light inlet surface, a light reflector plate disposed under the light conductor plate, a light absorbing member constituted by a black tape, and a sheet metal case having walls on all four sides and housing the component members described above. An end of the light reflector plate located toward the LEDs is positioned beyond the light inlet surface of the light conductor plate, and recesses are provided at the end of the light reflector plate. A black tape as a light absorbing member is disposed on the outer surface of the light reflector plate along the light inlet surface, and a light absorbing region is formed such that the black tape is exposed through the recess.