Abstract: A light emitting device has a light emitter defining an optical axis; and a luminous flux control member with an incident surface in a back surface and intersecting the optical axis, a reflection surface opposite the back surface, an emission surface connecting the back surface to the reflection surface, and a first recessed portion formed on the back surface farther from the optical axis than the incident surface and having a first inclined surface closer to the reflection surface with increasing distance from the optical axis, a front end of the first inclined surface such that a substantial portion of light emitted from the center region of the light emitter and reflected by the reflection surface do not strike the first inclined surface, and such that a substantial portion of light emitted from the light emitter and not reflected by the reflection surface strikes the first inclined surface.

Abstract: A planar light source device has: a housing, a substrate, a plurality of light-emitting devices each having a light-emitting element and a light-beam control member; and a light diffusing member. The housing has: a bottom surface and two inclined surfaces. In the light distribution characteristics of a light-emitting device, a light ray with the largest angle relative to the optical axis in an angular range within which a luminous intensity equal to or more than 70% of the maximum luminous intensity is exhibited reaches the inclined surfaces. A first angle between the optical axis of the light-emitting element and a light ray having the maximum luminous intensity emitted from the light-emitting device is larger than a second angle between the optical axis of the light-emitting element and a straight line connecting the luminescence center of the light-emitting element to the opening-side end portion of the housing.

Abstract: A light flux control member comprises a surface of incidence, which is the inner surface of a concave portion disposed on the back side, having an inner side surface and an inner ceiling surface; two reflective surfaces disposed on the front side, whereby a portion of the light incident on at least the inner ceiling surface is reflected in two directions, which are approximately perpendicular to the optical axis of the light-emitting element; and two light emission surfaces, disposed with the two reflective surfaces therebetween, wherefrom the light reflected by the two reflective surfaces and the light incident on the inner side surface are respectively emitted to the exterior. Each of the two light emission surfaces has, disposed in a region reached directly by light incident on either of the inner side surfaces, a first sloped surface that approaches the optical axis as the X-axis is approached.

Abstract: According to the present invention, a luminous flux control member of a light emitting device has an incident surface, a back surface, a reflection surface, an emission surface, and a first recessed portion. The first recessed portion includes a first inclined surface. With respect to a direction along the optical axis, a front end of the first inclined surface is positioned further toward the back side than light which is emitted from the center of a light emitting surface of a light emitting element, incident on the incident surface, reflected from the reflection surface, and transmitted toward the emission surface, and is positioned further toward the front side than light which is directly transmitted toward the emission surface without being emitted from an end on the light emitting surface of the light emitting element, incident on the incident surface, and passing by the reflection surface.

Abstract: A light flux control member has: a rear surface extending in the Y-axis direction; and a first incident plane, a second incident plane, and a third incident plane disposed on the rear surface side, said third incident plane reflecting light incident to the first incident plane. The light flux control member further has: a first reflecting plane disposed on the front side and reflecting, to one direction in the Y-axis direction, light incident to the first incident plane, light incident to the first incident plane and reflected on the third incident plane, and light incident to the third incident plane; and a second reflecting plane for reflecting light incident to the second incident plane to the other direction in the Y-axis direction. The light flux control member still further has two exit planes disposed sandwiching the first reflecting plane and the second reflecting plane and facing each other.

Abstract: The luminous intensity of light which is emitted from the light-emitting device and of which the angle with respect to the optical axis has the absolute value of from 0 to 60° is not more than 1.5% with respect to the maximum luminous intensity of light emitted from the light-emitting device. An angular range in which light of a luminous intensity of not less than 70% of the maximum luminous intensity is emitted, the absolute value of the maximum angle with respect to the optical axis is ?, an output surface is disposed so as to intersect a straight line of which the major angle, among the angles formed by the optical axis and a straight line passing a bottom surface-side end portion of the inclined surface and intersecting the optical axis, is not less than ?.

Abstract: A planar light source device has: a housing, a substrate, a plurality of light-emitting devices each having a light-emitting element and a light-beam control member; and a light diffusing member. The housing has: a bottom surface and two inclined surfaces. In the light distribution characteristics of a light-emitting device, a light ray with the largest angle relative to the optical axis in an angular range within which a luminous intensity equal to or more than 70% of the maximum luminous intensity is exhibited reaches the inclined surfaces. A first angle between the optical axis of the light-emitting element and a light ray having the maximum luminous intensity emitted from the light-emitting device is larger than a second angle between the optical axis of the light-emitting element and a straight line connecting the luminescence center of the light-emitting element to the opening-side end portion of the housing.

Abstract: A light flux control member has: a rear surface extending in the Y-axis direction; and a first incident plane, a second incident plane, and a third incident plane disposed on the rear surface side, said third incident plane reflecting light incident to the first incident plane. The light flux control member further has: a first reflecting plane disposed on the front side and reflecting, to one direction in the Y-axis direction, light incident to the first incident plane, light incident to the first incident plane and reflected on the third incident plane, and light incident to the third incident plane; and a second reflecting plane for reflecting light incident to the second incident plane to the other direction in the Y-axis direction. The light flux control member still further has two exit planes disposed sandwiching the first reflecting plane and the second reflecting plane and facing each other.

Abstract: A light beam control member according to the present invention comprises: an incidence surface including a first incidence surface arranged spaced apart from a center axis, and a second incidence surface arranged by surrounding the first incidence surface; an upper total reflection surface arranged opposite the incidence surface, and causing the light incident on the incidence surface to reflect in a direction away from the center axis; a lower total reflection surface arranged between the center axis and the first incidence surface and surrounding the center axis, and causing part of the light incident on the first incidence surface to reflect toward the upper total reflection surface; and an emission surface arranged outside the upper total reflection surface and surrounding the center axis, and causing the light reflected from the upper total reflection surface to be emitted to the outside.

Abstract: This light flux control member comprises: two entry surfaces disposed on two sides of a virtual plane serving as a boundary and containing the optical axis of the light-emitting element; a first protruding strip disposed between the two entry surfaces and along the virtual plane, into which light that has exited the light-emitting element enters; two total reflection surfaces, each formed at a position facing the light-emitting element with one of the entry surfaces sandwiched therebetween; two light-guide portions disposed at opposite positions with the first protruding strip sandwiched therebetween; and an exit surface formed on the external surface of each of the light-guide portions. A second light flux control member is disposed so as to cover the first protruding strip and includes a diffuse transmission portion whereby light that has entered and exited the first protruding strip is transmitted while being diffused.

Abstract: A light redirecting member includes an incidence surface; a first total reflection surface, two light guiding parts; two second total reflection surfaces disposed at respctivee end portions of the two light guiding parts such that a distance between the second total reflection surface and a virtual plane increases as the second total reflection surface extends from the end portions; and two emission surfaces. The virtual plane includes the optical axis and a first virtual line which intersects the optical axis and extends in an extending direction of the two light guiding parts, the two second total reflection surfaces being surfaces on which light which is incident on the incidence surface and directly reaches the two second total reflection surfaces is incident at an angle equal to or greater than a critical angle, the two second total reflection surfaces being configured to reflect the light.

Abstract: This surface light source is provided with a light diffusing plate and a plurality of light emitting devices. The plurality of light emitting devices each include a plurality of light emitting elements that are aligned in the second direction and have mutually different colors of emitted light, and a luminous flux control member that controls the distribution of the light emitted from the plurality of light emitting elements. The luminous flux control member includes an incident surface, total reflection surfaces, and two light guiding sections. The arrangement order of the plurality of light emitting elements in a given light emitting device differs from the arrangement order of the plurality of light emitting elements in another light emitting device adjacent thereto in the first direction or the second direction.

Abstract: A light beam control member according to the present invention comprises: an incidence surface including a first incidence surface arranged spaced apart from a center axis, and a second incidence surface arranged by surrounding the first incidence surface; an upper total reflection surface arranged opposite the incidence surface, and causing the light incident on the incidence surface to reflect in a direction away from the center axis; a lower total reflection surface arranged between the center axis and the first incidence surface and surrounding the center axis, and causing part of the light incident on the first incidence surface to reflect toward the upper total reflection surface; and an emission surface arranged outside the upper total reflection surface and surrounding the center axis, and causing the light reflected from the upper total reflection surface to be emitted to the outside.

Abstract: This light flux control member comprises: two entry surfaces disposed on two sides of a virtual plane serving as a boundary and containing the optical axis of the light-emitting element; a first protruding strip disposed between the two entry surfaces and along the virtual plane, into which light that has exited the light-emitting element enters; two total reflection surfaces, each formed at a position facing the light-emitting element with one of the entry surfaces sandwiched therebetween; two light-guide portions disposed at opposite positions with the first protruding strip sandwiched therebetween; and an exit surface formed on the external surface of each of the light-guide portions. A second light flux control member is disposed so as to cover the first protruding strip and includes a diffuse transmission portion whereby light that has entered and exited the first protruding strip is transmitted while being diffused.

Abstract: A light flux controlling member includes: an incidence surface; a first total reflection surface, and two light guiding parts; two second total reflection surfaces disposed at respective end portions of the two light guiding parts and formed such that a distance between the second total reflection surface and a virtual plane increases as the second total reflection surface extends from the end portions, the virtual plane including the optical axis and a first virtual line which intersects the optical axis and extends in an extending direction of the two light guiding parts, the two second total reflection surfaces being surfaces on which light which is incident on the incidence surface and directly reaches the two second total reflection surfaces is incident at an angle equal to or greater than a critical angle, the two second total reflection surfaces being configured to reflect the light; and two emission surfaces.

Abstract: A luminous flux control member (200) of the present invention has: a light input surface (210); total reflection surfaces (220), which are formed at positions facing a light emitting element with the light input surface (210) therebetween; two light guide sections (230), which are formed such that respective cross-sectional areas thereof are reduced in the direction to be away from the light input surface (210) and the total reflection surface (220), said light guide sections being formed at facing positions with the light input surface (210) and the total reflection surface (220) therebetween; and two light output surfaces (240), which are formed on the outer surfaces of the two light guide sections (230), respectively.

Abstract: A member for controlling luminous flux (100) has an incidence surface (110) and an emitting surface (120). The incidence surface (110) is a pyramidal surface having a recessed shape relative to the bottom of the member for controlling luminous flux (100), and having rounded borders between the individual facets. The horizontal cross-section of the incidence surface (110) is substantially similar in shape to that of an n-hedral irradiated surface (410). In the horizontal cross-section of the emitting surface (120), each of the straight lines connecting together adjacent angles of the n angles that correspond to the n angles of the irradiated surface (410) is substantially parallel to the side that corresponds to the horizontal cross-section of the incidence surface (110). The horizontal cross-section of the emitting surface (120) is the same as the n-hedron formed by the straight lines in the cross section, or fits inside the n-hedron.

Abstract: A luminous flux control member (200) of the present invention has: a light input surface (210); total reflection surfaces (220), which are formed at positions facing a light emitting element with the light input surface (210) therebetween; two light guide sections (230), which are formed such that respective cross-sectional areas thereof are reduced in the direction to be away from the light input surface (210) and the total reflection surface (220), said light guide sections being formed at facing positions with the light input surface (210) and the total reflection surface (220) therebetween; and two light output surfaces (240), which are formed on the outer surfaces of the two light guide sections (230), respectively.

Abstract: A light-emitting device combining a first luminous flux control member having a total reflection surface and emitting light from an emission surface in a narrow angle range centered mainly on an optical axis, and a second luminous flux control member arranged to surround the total reflection surface of the first luminous flux control member. The second luminous flux control member (102) of the light-emitting device is provided with a second incidence surface (126a) and a second emitting surface (126b). Of the light emitted from the light-emitting element (200), the light incident to the second incidence surface (126a) is within a range of angles ? larger than a largest angle to the optical axis of the light incident to the first luminous flux control member (101).

Abstract: An illuminating apparatus (100) has: a light source unit (140), which includes a light emitting element (110), and a luminous flux control member (120); a columnar light guide rod (160), which is composed of a transparent material; and a cover (170), which is disposed to cover the light source unit (140) and the light guide rod (160), said cover being disposed with respect to the light source unit (140) and the light guide rod (160) with an air layer therebetween. The light source unit (140) is disposed such that an output surface (126) of the luminous flux control member (120) faces an end surface (162) of the light guide rod (160).