Enplas Corporation

Kyouhei Yamada

Noriyuki Kawahara

Akinobu Seki

Masayo Takizawa

Satoshi Ikeya

Hiroshi Takatori

Masato Nakamura

Takuhito Ohse

Ryo Nonaka

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.

Light emitting device having luminous flux control member with recess radially distant from a light incident surface

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.

Planar light source device and display device

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.

Light flux control member, light emitting device, and a surface light source device

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.

Light flux controlling member, light emitting device and illuminating device

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.

Light flux control member, light-emitting device, and illumination device

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.

Display device with surface light source having light redirecting member

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

Luminous flux control member, light emitting apparatus, and illuminating apparatus

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

Member for controlling luminous flux, light-emitting device, and illumination device

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 () of the light-emitting device is provided with a second incidence surface () and a second emitting surface (). Of the light emitted from the light-emitting element (), the light incident to the second incidence surface () is within a range of angles &#x3b8; larger than a largest angle to the optical axis of the light incident to the first luminous flux control member (). The second emitting surface () controls the light incident to the second incidence surface () to have light distribution characteristics different from those of the light emitted from the first luminous flux control member (), and emits the light.

Light-emitting device and illumination device

Disclosed is a light emitting device to reduce the number of components and elements of a light emitting device and a lighting device having the light emitting device, and simplify and miniaturize the structures of these devices. With this light flux controlling member (), a total reflecting surface () functions like a reflecting member, light from a light emitting element (LED, for example) () that is incident from an input surface () and that arrives at the total reflecting surface () is total-reflected by the total reflecting surface () toward the output surface () side (including a first output surface () and second output surface ()), and the illuminating light from the second output surface () is superimposed upon the illuminating light from the first output surface (), so that the light from the light emitting element (LED, for example) () is used efficiently and illuminates the illumination target surface () over a wide range.

Light flux controlling member, light emitting device, and lighting device

A fluid handling unithas an outside large-diameter cylindrical portion, an outside small-diameter cylindrical portionand an inside cylindrical portionwhich are integral-molded so as to be integrated with each other. The inside cylindrical portionhas a plurality of slits, which are extend from the lower end of the inside cylindrical portionto the upper end thereof, for establishing a communication between an inside fluid housing chamber, which is formed in the inside cylindrical portion, and an outside fluid housing chamberwhich is formed between the inside cylindrical portionand the outside small-diameter cylindrical portion. The plurality of slitsare designed to cause the most part of a liquid in the inside fluid housing chamberto enter the outside fluid housing chamberdue to capillarity when the quantity of the liquid fed into the fluid handling unitis not larger than a predetermined quantity, and to allow the liquid in the outside fluid housing chamberto enter the inside fluid housing chamber when the quantity of the liquid fed into the fluid handling unitexceeds the predetermined quantity.

Fluid handling unit and fluid handling apparatus using same

A fluid handling unithas an inside cylindrical portionwhich is arranged in an outside small-diameter cylindrical portionso as to be eccentric with respect to the outside small-diameter cylindrical portion, and a plurality of slitsfor establishing a communication between an inside fluid housing chamberand an outside fluid housing chamber. The most part of liquid in the inside fluid housing chamberenters the outside fluid housing chamber, in which the height of the liquid level varies in circumferential directions, when the quantity of the fed liquid is not larger than a predetermined quantity. The liquid in the outside fluid housing chamberenters the inside fluid housing chamberwhen the quantity of the fed liquid exceeds the predetermined quantity.

A fluid handling apparatushas a plurality of fluid handling subassembliesarrayed on a plate body. Each of the fluid handling subassemblies includes: an injecting sectionfor injecting a fluid; a fluidized sectionfor allowing the fluid to continuously flow downwards; a fluid housing chamberfor receiving the fluid from the fluidized section; a wall portionformed between the fluid housing chamber and the fluidized section; slitsfor allowing the fluid to enter the fluid housing chamber; and a surface-area increasing meansfor increasing the area of a contact surface with the fluid in the fluidized section. The slits extend from a lower end positioned in the vicinity of the lower end of the fluidized section, to an upper end higher than the upper end of the fluidized section, for allowing the injecting section and fluidized section to be communicated with the fluid housing chamber.

Growing community of inventors

Saitama, Japan

Kyouhei Yamada