Abstract: Disclosed herein is a light emitting device, including: a light emitting diode; an sealing resin member having an arrangement face and configured to seal the light emitting diode; and a lens disposed on the arrangement face of the sealing resin member and formed so as to have a circular shape as viewed in the direction of an optical axis of light emitted from the light emitting diode, the lens having a concave portion formed at a central portion in such a manner as to be concave toward the sealing resin member.

Abstract: A light emitting device includes a plurality of light emitting diodes, a plurality of sealing resins, and a lens body formed in substantially a shape of a flat plate for guiding the light. The lens body is also disposed in a state of extending over the disposition surface of each sealing resin. The lens body includes a plurality of lens parts and a plurality of light guiding parts for reflecting the light by inside surfaces of the light guiding parts. The plurality of lens parts and the plurality of light guiding parts of the lens body are formed integrally with each other. The lens parts are disposed on the respective disposition surfaces of the sealing resins, and a plurality of light emitting function parts for sending out the light reflected by the inside surfaces of the light guiding parts are formed in the light guiding parts.

Abstract: A light emitting device includes: a light guide unit; a light source; a light control member having a light incidence face on a back face, a light outgoing face on a surface and a light dispersion structure, and disposed so as to cover the gap on the neighboring two light guide plates; and a diffusion member disposed above the light guide unit and the light control member. The light dispersion structure includes a plurality of grooves extending in a direction along the side end face of the light guide plate and having curved wall faces, and emits leakage light from the gap in outgoing light of the light emitting element to a region wider than a region opposed to the gap, in the diffusion member.

Abstract: Provided are an illumination device and a lens employed in the device for controlling light travelling direction, the device being capable of illuminating brightly and uniformly a certain limited region (region-to-be-illuminated) corresponding to an object such as subject for photography. The illumination device emits light H coming from a light emitting element (point-like light source) employing a LED as a light emitting source via the lens. A light control emission face of the lens emits light (rays), which is included in light H introduced into the lens through an incidence face thereof and travelling within the lens to the light control emission face without undergoing inner-reflection at any surface of the light control emission face, as illumination light.

Abstract: A light emitting apparatus is provided which includes a plurality of light sources for emitting a light, and a light guide plate having a substantially plate shape orthogonal to the optical axis direction of the light source, which includes a light incident face into which a light exited from the light source is incident and a light exit face from which the light incident from the light incident face is exited. Irregularities each made of a first slope forming an angle ?a with the plane of the light incident face and a second slope forming an angle ?b with the plane of the light incident face are continuously formed on the light incident face.

Abstract: There is provided a light control member including a plate-like member including a first surface formed flat and a second surface facing the first surface and having at least three prism line groups constituted of a plurality of linear prisms arranged in substantially parallel. In the prism line group, each one of the linear prisms constituting each of the prism line groups intersect at one intersection, and the linear prism is formed into a convex shape having a substantially curved outer edge as viewed from the longitudinal direction.

Abstract: An illumination device, surface light source device, and an illumination unit are provided that provide increased and uniform emission brightness. The device includes parallel fluorescent lamps between a reflection sheet and light flux control member. A back face of the light flux control member includes recesses and curved surfaces connected to locations corresponding to those of the fluorescent lamps. Each recess and curved surface includes light entering surfaces. An entering surface causes light coming to areas corresponding to the fluorescent lamps, included in the light reaching a light diffusing member, to diverge smoothly. Another light entering surface and convex curved surface causes light coming to areas, which do not correspond to the fluorescent lamps, adjacent to areas corresponding to the fluorescent lamps to have light intensity increased to that of the light coming to the areas corresponding to the fluorescent lamps.

Abstract: A planar light source device of the present invention includes a light guide plate and a plurality of light-emitting diodes. The light guide plate includes a plurality of plate-form light guide members whose side surfaces are formed in a serrated shape. The serrated-shaped side surfaces of adjacent light guide members are connected in a planar direction so as to be engaged with each other. The plurality of light-emitting diodes emit light toward each of the light guide members. With this configuration, it is possible to securely prevent irregularity of brightness, when changing the luminance in the display screen in unit of blocks.

Abstract: A light emitting device assembly includes: a light emitting device; and a light output member provided on the light emitting element and having an upper surface on which a curved part that outputs light from the light emitting device is provided, wherein a value of a x coordinate of a curved part center axis is a positive value, a locus of an edge of a curved part forms a circle or oval around the curved part center axis, light on a Z-axis output from an origin is output from the curved part at an angle ?0 (?0>0) formed with the Z-axis within a XZ-plane, and function F(?,??) expressed by F(?,??)=(??+????)/????(1) monotonously increases, takes the maximum value at ?=?0 (<0), and then, monotonously decreases as a value of ? increases from the minimum value.

Abstract: A surface light source device of side light type illuminating an LCD panel and comprising a guide plate, a primary light source, a reflection sheet, and a prism sheet for light control. A plurality of fine light scattering elements and rough area M are formed on an emission face of the guide plate. The rough area M is formed among the light scattering elements and has scattering power weaker than that of the light scattering elements. The dot-like light scattering elements are distributed according to a certain pattern that is designed to promote emission. Emission is promoted where the light scattering elements are formed and also in the area M. Accordingly, fine periodic bright-dark unevenness and glaring are reduced and the prism sheet, disposed on the emission face, is prevented from sticking to the emission face.

Abstract: Light from light emitting element enters into a flux control member through a recess on an inner face of the light flux control member, being emitted from an emission control face (outer face). At least so far as light falls within a half-intensity-angular-range, the light satisfies Condition 1 ((?5/?1)>1 except for light in the vicinity of a normal direction of the emission control face) and Condition 2 (Value of ?5/?1>1 gets smaller gradually with increasing of ?1). It is noted that ?1, ?5 are angles made at being inner-incident to the emission control face and at being emitting from the same, respectively. The emission control face has a planar outline shape which is anisotropic around optical axis L, thereby causing value of ?5 /?1 to have a change depending on direction angle ? around optical axis L, with the result that highly uniform light is supplied to a required anisotropic irradiation range.

Abstract: Light from a LED (point-like light source) is expanded smoothly to a desirable range at a high efficiency by a light flux control member. The light flux control member is provided with a lens portion located at a part corresponding to the LED and a mount portion (body portion) detachably supporting the lens portion. The lens portion has a back face provided with a recess located as to correspond to the LED. The recess expands light from the LED smoothly and efficiently to a broad range, bringing an emission from a front face (fore face) toward a wide range. A member-to-be-illuminated supplied with the emission is illuminated uniformly. LEDs and recesses are made enable to be arranged flexibly without need of an increased number of molds.

Abstract: An increased emission brightness provides a clear image display. Light from luminescent lamp 10 travels into light guide plate 2 through incidence face 3, being emitted from emission face 4 for irradiating LCD panel 5. Back face 7 of light guide plate 2 serves as light gathering function surfaces 14, 15 reflecting light as to gather the light around a normal direction of emission face 4 which provides an emission promotion surface having first and second slopes 17 and 18 for promoting the light introduce through incidence face 3, the first slopes 17 being configurated as to gently decrease thickness of light guide plate 2 with an increasing distance from incidence face 3 while second slopes 18 are configurated as to sharply increase thickness of light guide plate 2 with an increasing distance from thinner-plate-thickness-side end portions of slopes 17.

Abstract: Disclosed herein is a light emitting device, including: a light emitting diode; an sealing resin member having an arrangement face and configured to seal the light emitting diode; and a lens disposed on the arrangement face of the sealing resin member and formed so as to have a circular shape as viewed in the direction of an optical axis of light emitted from the light emitting diode, the lens having a concave portion formed at a central portion in such a manner as to be concave toward the sealing resin member.

Abstract: A light emitting device includes a plurality of light emitting diodes, a plurality of sealing resins, and a lens body formed in substantially a shape of a flat plate for guiding the light. The lens body is also disposed in a state of extending over the disposition surface of each sealing resin. The lens body includes a plurality of lens parts and a plurality of light guiding parts for reflecting the light by inside surfaces of the light guiding parts. The plurality of lens parts and the plurality of light guiding parts of the lens body are formed integrally with each other. The lens parts are disposed on the respective disposition surfaces of the sealing resins, and a plurality of light emitting function parts for sending out the light reflected by the inside surfaces of the light guiding parts are formed in the light guiding parts.

Abstract: Light from a LED (point-like light source) is expanded smoothly to a desirable range at a high efficiency by a light flux control member. The light flux control member is provided with a lens portion located at a part corresponding to the LED and a mount portion (body portion) detachably supporting the lens portion. The lens portion has a back face provided with a recess located as to correspond to the LED. The recess expands light from the LED smoothly and efficiently to a broad range, bringing an emission from a front face (fore face) toward a wide range. A member-to-be-illuminated supplied with the emission is illuminated uniformly. LEDs and recesses are made enable to be arranged flexibly without need of an increased number of molds.

Abstract: Provided is a light emitting device having an inner-propagation-medium which caused directivity-to-optical-axis-direction to be relaxed. Light of a LED travels in the inner-propagation-medium, being emitted from an inside area of or outside area in a lens surface directly or via an inclined reflection face. A light emitter provides an output light having an intensity profile with a half-intensity-angular-range not greater than 20°, which expresses directivity of the output light. The outside area in the lens surface performs a traveling-direction-expanding-function which is not only relatively intensive as compared that performed by the inside area in the lens surface, and but also relatively intensive as compared that performed in an imaginary case where the outside area gives a planar surface perpendicular to an optical axis. The half-intensity-angular-range of the intensity profile of the light emitting device is not smaller than 30° with respect to the optical axis and not greater than 70°.

Abstract: At least one LED emits light received by a light flux control member and subsequently emitted from an emission race thereof. Each LED is in a recess formed in the light flux control member and configured to satisfy the following conditions, for at least light emitted toward within a half-intensity-angular-range from the corresponding LED, where ?1 is the emission angle of any light emitted from the emission face of the light flux control member: (1) ?5/?1>1, except for light emitted toward within an angular-neighborhood of a normal direction with respect to the emission face; and (2) ?5/?1 decreases gradually as ?1 increases. If a plurality of LED's are employed, differences in emitting color among individual LED's are made less conspicuous and uniform illumination free from uneven brightness is realizable.

Abstract: Primary light from primary light source (LED) is supplied toward a light an input face of an light control member. The light input face is provided with a plurality of projections for light input promotion. Each projection is composed of a generally spherical top portion and tapered column-like portion. Height of each projection may greater than a distance as far as an adjacent projection. An light output face of the light control member may be provided with of a plurality of projections having a function of causing an inner incident light to be deflected as to approach a frontal direction on being emitted, or may be formed of a roughened surface. A light flux control member may be interposed between the primary light source and the light control member.

Abstract: A surface light source device is provided with a primary light source and light guide plate. The light guide plate has an incidence side face opposite to which the primary light source employing LEDs or the like is disposed, an emission face for emitting light, which has been incident to the incidence side face, during the propagation process, and a back face oppositely located with respect to the emission face. The back face may be provided with a plurality of prism projections running generally vertically to the incidence side face. The primary light source has an effective light emitting surface provided with length L in a thickness direction of the light guide plate, which is not smaller than thickness t of the light guide plate at the incidence side face. This causes primary light to be incident to the incidence side face as to cover from an upper edge to lower edge thereof, preventing dark parts from being generated.