Abstract: A backlight module, a control method and control device thereof, and a corresponding display device are disclosed. With this backlight module, switching between a narrow view angle and a wide view angle is achieved without the additional need for carrying any auxiliary tools. A light exit region of the backlight module includes a first light exit region and a second light exit region located on a periphery of the first light exit region. The backlight module includes a first light source component and a second light source component. Light emitted from the first light source component is emitted out through the first light exit region, and light emitted from the second light source component is at least partially emitted out through the second light exit region. Switch control ends for the first light source component and the second light source component are not electrically connected.

Abstract: A light-emitting apparatus is disclosed. The light-emitting apparatus includes at least one light guide member, at least one light source unit disposed at at least one of two opposite end portions of the light guide member, a first reflection unit disposed on a first inner surface portion of the light guide member, and a plurality of light output units disposed on a second inner surface portion of the light guide member, located opposite the first inner surface portion, while being spaced apart from each other.

Abstract: A light path adjustment mechanism includes a carrier, an optical plate member, a support, a first axis, a second axis, a first actuator and a second actuator. The carrier includes an inner frame and an outer frame, the optical plate member is disposed on the inner frame and has a reflective surface and an opposite surface opposite the reflective surface. The first axis is disposed between the inner frame and the outer frame, and the second axis is disposed between the outer frame and the support. The first actuator and the second actuator are disposed on one side of the carrier facing away from the reflective mirror, and the opposite surface of the reflective mirror and the first axis are spaced at a distance.

Abstract: A light guide plate includes a first light emitting surface and a second light emitting surface. The first light emitting surface and the second light emitting surface are connected by an inclined surface. The first light emitting surface is connected to the light incident surface of the light guide plate and is higher than the second light emitting surface, and the inclined surface is provided with a protruding structure. According to the technical solutions in the embodiments of the present disclosure, part of the light projected onto the inclined surface is reflected back to the light guide plate by the protruding structure and reflected back and forth between the bottom surface of the light guide plate and the inclined surface to be sufficiently mixed and homogenized. A part of the homogenized light emits from the second light emitting surface to compensate for a longitudinal brightness difference.

Abstract: An electronic device may be provided with a display. An opaque layer may be formed on an inner surface of a display cover layer in an inactive area of the display. An optical component window may be formed from the opening and may be aligned with an ambient light sensor such as a color ambient light sensor. The color ambient light sensor may have photodetectors on a light detector integrated circuit. Electrostatic shielding may be incorporated into the color ambient light sensor to prevent perturbations in the output of the color ambient light sensor due to the presence of electrostatic charge in the vicinity of the optical component window. The shielding may include a grounded shield layer on a surface of an ambient light sensor support structure that faces the display cover layer and may include a transparent shield layer overlapping the photodetectors.

Abstract: In one embodiment, an overhead street light (a luminaire) is formed that has an asymmetric light intensity distribution, where the peak intensity is greatest along the direction of the street, lower directly across the street, and much lower on the house side of the street. Around the edge of a circular transparent light guide are white light LEDs that inject light into the light guide. To help control the asymmetry of the light intensity distribution, sawtooth-shaped grooves are formed in the light guide surface opposite to the light-emission surface and parallel to the street. Gaussian diffusers are used to partially diffuse the light. By proper selection of the grooves, the Gaussian diffuser, and the relative amounts of light emitted by LED segments around the light guide, the desired asymmetrical light intensity distribution is achieved while a direct view of the light exit surface appears as a uniform light.

Abstract: A lighting device, such as a LED module, comprising an elongated support structure having a longitudinal direction and electrically-powered light radiation sources distributed along the support structure, the support structure including at least one light-permeable layer, one or more optical signal sources coupled with the light-permeable layer, for injecting therein an optical signal propagating in the longitudinal direction, and one or more optical signal detectors coupled with the light-permeable layer, for detecting the optical signal injected by the optical signal source(s).

Abstract: A lead frame includes an electrode, a hanger lead, and an outer frame and is formed integrally with a supporting member supporting the electrode, so that a package having a depression in which a light-emitting element will be mounted is formed. The depression is open on the upper side, its side walls are mainly constituted of the supporting member, and at least a part of its bottom surface includes the electrode. The electrode is disposed in a supporting member forming region. The hanger lead extends from the outer frame to reach the supporting member forming region. A chamfered surface is formed on at least a part of an upper side corner of an end of the hanger lead.

Abstract: A light guide composition includes a substrate and a first microstructure layer. The substrate has a first main surface. The first microstructure layer is disposed on the first main surface. A refractive index of the substrate with respect to a first light wavelength is greater than a refractive index of the first microstructure layer with respect to the first light wavelength, a refractive index of the substrate with respect to a second light wavelength is smaller than a refractive index of the first microstructure layer with respect to the second light wavelength, and the first light wavelength is smaller than the second light wavelength.

Abstract: According to one embodiment, an illumination device includes a light source, clad, and a plurality of cores. The clad includes a first edge at a light source side, a second edge opposite to the first edge, and a plurality of grooves formed by a plurality of partitions extending in parallel to each other from the first edge to the second edge. The cores are accommodated in the grooves, and each core includes an incident surface on which light from the light source is incident and an exit surface exposed from the groove to emit the light incident on the incident surface.

Abstract: An edge-lit luminaire designed to be of minimal weight and to distribute illumination evenly upon an environment is provided. In some embodiments, the luminaire comprises a frame, a plurality of panels, a light source, and power circuitry. More specifically, the panels are arranged at desired angles so as to maximize the evenness with which light is emitted from the light source, which is secured to interior sides of one or more edges of the frame. In use, the frame is lightweight and configured to mount within or suspend from a ceiling.

Abstract: An environmentally-sealed refractive lighting optic includes a single light-emitting diode (LED) printed circuit card that includes a plurality of LED components and a single, refractive optic element retained directly to the LED printed circuit card in a self-sealing manner without mechanical fasteners. The refractive optic element is configured to environmentally seal the LED components on the LED printed circuit card. Further, the refractive optic element may include a liquid silicone rubber material or an optically-clear low-pressure molded room temperature vulcanizing (RTV) silicone material.

Abstract: Methods for improving color uniformity across an LCD backlight unit having a viewable area, a downconversion film element and blue LEDS comprise increasing blue light absorption while reflecting red and green light in at least one edge of the viewable area.

Abstract: The present application discloses a liquid crystal display apparatus, a backlight module based on quantum dots and a method of manufacturing the same. Wherein the backlight module use the edge type structure and dispose the backlight source emitting monochromatic light in a side of the light guide plate, and formed a plurality of recessed portions on the lower surface of the light guide plate, the surface region of the recessed portions is coated the transparent dielectric layer doped with the dichroic quantum dots, a and metal reflecting layer successively.

Abstract: Disclosed herein is a liquid crystal display device having a thin thickness and a reduced size of a bezel. According to an exemplary embodiment, the liquid crystal display device includes: a liquid crystal display panel including a display area and a non-display area enclosing the display area; a light guide plate disposed under the liquid crystal display panel and having a polygonal plane shape including a first side, a second side, a third side, and a fourth side; and a light source adjacent to the first side of the light guide plate, wherein at least one of the second side, the third side, and the fourth side of the light guide plate overlaps the display area.

Abstract: The present disclosure provides a light guide plate, a manufacturing method thereof, a backlight source and a display device. The light guide plate includes: a first surface, a second surface, and at least one blazed gating structure that is on the second surface of the light guide plate, wherein light incident from the first surface of the light guide plate forms a total reflection in the light guide plate after the light irradiates the at least one blazed gating structure and is diffracted by the at least one blazed grating structure.

Abstract: A backlight module and a display device are provided. The backlight module comprises: a light guide plate having a light incident surface; and a light source disposed on at least one side of the light guide plate. A light exit surface of the light source faces the light incident surface of the light guide plate. At least one through hole is disposed in the light guide plate, and a light adjustment component is disposed in the at least one through hole.

Abstract: A display device is provided. The display device comprises a display surface with several segments that can be backlit, which are configured in such a way that, if subsets of the segments are backlit together, a different one of several symbols is in each case depicted by the display surface, a number of light sources corresponding to the number of symbols, a layer structure of several flat light transmitting layers made of a transparent or translucent material, preferably plastic, wherein the light transmitting layers are stacked with the main surfaces facing each other and are in each case configured in such a way that, primarily, light of exactly one of the light sources is transmitted from a narrow side of the light transmitting layer provided for light entrance to another narrow side of the light transmitting layer as a light exit to at least one segment of the associated symbol.

Abstract: The invention relates to the field of seismology and volcanology, especially the monitoring of the sites in question, called “unstable sites”, and more specifically the monitoring of a fault on such a site. In this respect, the invention especially relates to a reflective assembly to be arranged on a monitored site, the site being monitored from an observation point from which an electromagnetic wave is directed towards the reflective assembly. The invention also relates to a method for monitoring a site by means of such a reflective assembly.

Abstract: A backlight unit 12 includes LEDs 17, a light guide plate 19 including a light entry end surface 19b, a light output plate surface 19a, and an opposite plate surface 19c, a wavelength conversion sheet 20, and a reflection sheet 25. The light guide plate 18 includes a parallel plate surface 27 on a central portion of the opposite plate surface 19c and parallel with the light output plate surface 19a, and an inclined plate surface 28 on a part of the outer peripheral side portion and being inclined with respect to the light output plate surface 19a to be closer to the light output plate surface 19a as is closer to the outer peripheral end surface. The wavelength conversion sheet 20 overlaps the light output plate surface 19a and contains a phosphor that wavelength-converts the light from the LEDs 17.

Abstract: A protective cover adaptive to an electronic device is provided. The protective cover comprises a connecting portion, a cover body and a light guide plate. A side of the cover body is connected to the connecting portion and is movable relative to the connecting portion. The light guide plate includes a light input surface, an attachment surface, and a light output surface. The light input surface and the attachment surface are opposite to each other. The light guide plate is connected to the cover body via the attachment surface and light from a light source is transmitted through the light input surface and output from the light output surface.

Abstract: A backlight module and a display apparatus are provided. The backlight module includes: a light bar, a quantum dot encapsulated tube and a light guide plate; the light bar and light guide plate are disposed at two sides of quantum dot encapsulated tube respectively, the light bar and quantum dot encapsulated tube are disposed in parallel, the light bar and quantum dot encapsulated tube are located at a light incident surface side of light guide plate, a plurality of LED lights are disposed on the light bar at a side facing towards the quantum dot encapsulated tube, an LED light corresponding to valid area of quantum dot encapsulated tube is monochromatic LED light, an LED light corresponding to invalid area of quantum dot encapsulated tube is white LED light, and invalid area of quantum dot encapsulated tube is within irradiation range of the white LED light.

Abstract: The invention relates to a light comprising: a primary lightpipe (2); and, a light source (1). The primary lightpipe may have: a lightpipe inlet side (3) constructed and arranged to receive light from the light source and to allow it to enter the primary lightpipe; a back side (6b) being provided with a serrated structure (5) comprising a reflecting surface (10) to reflect light from the light source; and, a front side (6a) constructed and arranged to internally reflect the light received from the light source to the back side of the primary lightpipe and to transmit light received from the reflecting surface.

Abstract: An optical system for influencing a light has a first optical element (1), by means of which a plane (E) is defined, wherein the first optical element (1) has a lateral edge region (11) designed for the entry of the light, and a second optical element (2), wherein the second optical element (2) is arranged parallel to the first optical element (1) and has a light outlet region (21) for the exiting of the light. The lateral edge region (11) of the first optical element (1) is designed to reduce the glare of or bundle the light in the plane (E), and the second optical element (2) has a elongate lens element (3), which extends along a longitudinal axis (L) and is designed to reduce the glare of or bundle the light in an additional plan (E?), which is oriented at least substantially perpendicularly to the plane (E) mentioned first.

Abstract: Systems and methods for increasing dynamic contrast in a liquid crystal display (LCD) may include a segmented backlight that may include one or more segments and one or more sets of light emitting diodes (LEDs). Each set of LEDs may be configured to illuminate a corresponding segment and each segment may include a notch(es) configured as a light barrier to reduce light leakage to non-adjacent segments. The notch(es) may be of variable length, depth, and width and may be three-dimensional, having a width the varies along the depth and length of the notch and a depth that varies along the width and length of the notch. In some embodiments, the notch(es) may be reflective, some degree of opaque, and/or blackened.

Abstract: Systems and methods for a keyboard backlight module are described. In some embodiments, a keyboard backlight module may include: a Light Guide Plate (LGP), a reflector coupled to the LGP, and a light bar at least partially sandwiched between the LGP and the reflector.

Abstract: A backlight structure includes a frame body, a light guide plate, a first optical film, a second optical film, and a fixed member. The frame body has a first frame edge and a second frame edge opposite thereto. The light guide plate is disposed in the frame body and has a first and second short border corresponding respectively to the first frame edge and the second frame edge. The light guide plate has a protrusion protruding from an upper surface of the light guide plate and being adjacent to the second short border. The optical films are disposed over the light guide plate and include a first and second short-edge portion disposed respectively over the first short border and the second short border. The second short-edge portion has a notch matching the protrusion. The fixed member fixes the frame body and the optical films.

Abstract: A reflection structure, a backlight module and a display device, the backlight module comprises a light source and a back plate and the light source is disposed on a side edge of the back plate, the reflection structure comprises: a first reflection plate disposed on the back plate, an end close to the light source of which can extend freely; and at least one second reflection plate disposed on an edge of the first reflection plate, wherein a first end of the second reflection plate overlaps the first reflection plate, a second end of the second reflection plate extends toward the side edge of the back plate, and at least one of the first end and the second end of the second reflection plate can extend freely.

Abstract: The present disclosure discloses an LED package structure and a chip-scale light emitting unit. The chip-scale light emitting unit includes an LED chip, a phosphor sheet, and at least one light guiding group. The phosphor sheet covers entirely a top surface of the LED chip. The phosphor sheet has a light emitting surface arranged away from the LED chip, and the light emitting surface has a central region and a ring-shaped region surrounding the central region. The light guiding group is disposed on the ring-shaped region and covers at least 60% of an area of the ring-shaped region of the phosphor sheet, and the central region is not covered by the light guiding group. The light guiding group includes a plurality of light guiding micro-structures.

Abstract: A light guide plate including a light guide main body and an index matching layer is provided. The light guide main body has a light-emitting surface and a bottom surface opposite to the light-emitting surface. The index matching layer is disposed adjacent to the bottom surface, wherein a refractive index of the light guide main body is n1, and a refractive index of the index matching layer is n2. 1.07*n2?n1?1.7*n2, and 0.1?(n1?n2)?0.7. A thickness of the index matching layer is larger than 500 nm. A backlight module and a display apparatus are also provided.

Abstract: An illumination device includes a plurality of light-emitting elements (LEEs); a light guide extending in a forward direction from a first end to a second end to receive at the first end light emitted by the LEEs and to guide the received light to the second end; an optical extractor optically coupled to the second end to receive the guided light, the optical extractor including a redirecting surface to reflect a first portion of the guided light, the reflected light being output by the optical extractor in a backward angular range, and the redirecting surface having one or more transmissive portions to transmit a second portion of the guided light in the forward direction; and one or more optical elements optically coupled to the transmissive portions, the optical elements to modify the light transmitted through the transmissive portions and to output the modified light in a forward angular range.

Abstract: A lighting fixture includes a first end plate and a second end plate that are coupled to and disposed on opposite sides of a reflector panel. Further, the lighting fixture includes a pair of elongated heat sinks that are coupled to the first end plate and the second end plate on opposite latitudinal ends of the pair of elongated heat sinks. Each elongated heat sink retains a longitudinal edge of a light guide and/or a plurality of LEDs directed towards the longitudinal edge. Further, the lighting fixture includes an optical device that is removably coupled to the lighting fixture such that the first end plate, the second end plate, and the pair of elongated heat sinks retain and overlap a perimeter of an optical device to prevent light leakage. The light guide is oriented horizontally and the optical device is oriented to receive light exiting the light guide.

Abstract: A backlight module includes a light guide plate that includes a light incident surface including a first light incident section and a second light incident section, a light emission surface, and a first reflection surface defining a first acute angle with respect to the first reflection surface; a light bar, which includes first and second light sources respectively corresponding to the first and second light incident section such that light from the first and second light sources is allowed to enter the light guide plate to be selectively reflected by the first reflection surface and emit outward from the light emission surface; and a control circuit, which is electrically connected to the first light source and the second light source for controlling the first light source and the second light source. Also provided is a liquid crystal display that includes the backlight module and may achieve sectionized displaying.

Abstract: A display module including a display panel and a backlight module disposed on a side of the display panel is provided. The backlight module includes a light guide, a light emitting diode, and a first optical film. The light emitting diode has a light emitting surface adjacent to the light guide. The first optical film is located between the light guide and the display panel. The first optical film includes a plurality of first prisms extending along a first direction. The first prisms corresponding to the light emitting surface form a main portion and a peripheral portion located outside the main portion. The main portion has a first height larger than a second height of the peripheral portion.

Abstract: A liquid crystal display includes a display panel having a lower substrate, an upper substrate disposed opposite to the lower substrate, and a liquid crystal layer disposed between the lower and upper substrates, a light source which emits light, a glass light guide plate which diffuses the light from the light source to the display panel, and a first bonding member which bonds the lower substrate to the glass light guide plate.

Abstract: There are provided a light emitting unit using a wavelength conversion member which may be put to practical use, and a display and a lighting apparatus which include the light emitting unit. The light emitting unit includes: a light source; an optical part including a light incident surface, the light incident surface facing the light source; a wavelength conversion member provided between the light source and the light incident surface; and a holding member holding the wavelength conversion member at a position between the light source and the light incident surface of the optical part.

Abstract: A display device includes a display housing and plural display-light-emitting devices. At least one of the plural display-light-emitting devices includes a light guide member, a holding member, and a light source. The light guide member includes a light incident portion, a light exit portion, and a reflecting portion. The light guide member causes light incident upon the light incident portion to be reflected by the reflecting portion so as to guide the light to the light exit portion. The holding member has an opening so as to house the light guide member, includes an elastically deformable holding piece, and holds the light guide member by using the holding piece. The light source is provided at a portion facing the light incident portion. The holding member has a cut that allows the holding piece to be elastically deformed.

Abstract: A display device includes a display panel which displays an image with light, the display panel including a first substrate, a second substrate facing the first substrate, and an image display layer disposed between the first and second substrates; a backlight unit which generates and provides the light to the display panel; and a bottom chassis facing the first substrate to dispose the second substrate therebetween and to define an inner space with the first substrate. The image display layer, the second substrate, and the backlight unit are accommodated in the inner space defined by the first substrate and the bottom chassis.

Abstract: A backlight module includes a lamp set, a light guiding plate, a diffuser, a top prism sheet, and a down prism sheet. The diffuser includes a first end and a second end opposite to each other, the first end of the diffuser is closer to the lamp set than the second end, and the diffuser includes a first end and a second end opposite to each other. The diffuser includes the overlapped portion stacked with the top/down prism sheets and the extended portion extending from the overlapped portion. On the first end of the diffuser, the light beams emitted by the light guiding plate may be processed by the first extended portion, instead of being emitted out directly. This can avoid the bright lines occurred by the backlit so as to reduce the optical leakage. In addition, a display device is also disclosed.

Abstract: A display device includes a display panel, a light guide plate, a first light source and a second light source. The display panel is provided with a plurality of pixel units arranged in an array, the light guide plate includes a first reflection structure and a second reflection structure. The first reflection structure reflects light emitted from the first light source to the pixel units of the display unit and the light is guided to a first view side after passing through the display panel. The second reflection structure reflects light emitted from the second light source to the pixel units of the display panel and the light is guided to a second view side after passing through the display panel. The above display panel is capable of achieving naked eye dual vision display without wearing dedicated glasses.

Abstract: A backlight unit includes a light conversion member; a light guide plate including a light exit surface, a rear surface facing the light exiting surface, and connection surfaces including a first surface and a second surface facing each other to connect the light exit surface and the rear surface; a reflective member; and a light source emitting a first color light incident to the first surface and a portion of the first color light reaches the second surface on which the reflective member is disposed to specularly reflect the portion of the first color light. The light conversion member is disposed on the light exit surface, receives the first color light from the light guide plate, and emits a second color light different from the first color light.

Abstract: A lighting module comprises: a light guide plate comprising a top surface and a bottom surface, wherein the light guide plate is configured to emit a first light upward from the top surface and a second light downward from the bottom surface; a first case covering an one side of the light guide plate; a second case covering an other side of the light guide plate; a first light source which is disposed in the first case and is configured to emit light to the one side of the light guide plate; and a second light source which is disposed in the second case and is configured to emit light to the other side of the light guide plate.

Abstract: A light adjusting sheet includes a base and a first light adjusting structure layer. The base includes a first surface and a second surface opposite to the first surface. The first light adjusting structure layer is disposed on the first surface of the base, and the first light adjusting structure layer includes a plurality of light adjusting structures. Each light adjusting structure includes a major axis, a minor axis and a thickness, wherein the major axis of the light adjusting structure is in parallel with an extending direction. A ratio of a length of the minor axis to a length of the major axis is between 0.093 and 0.6, and the thickness is between 2 ?m to 6 ?m. A backlight module using the light adjusting sheet can achieve high brightness and large viewing angle.

Abstract: A backlight device includes a light guide plate on which a plurality of different light exiting patterns are formed and a display device. According to the backlight device and the display device, positions at which light is extracted on the light guide plate are changed, and thus, a 3-dimensional image of a high resolution may be provided.

Abstract: A display device includes a display panel receiving light and displaying an image, a light guide plate guiding the light to the display panel, a printed circuit board disposed adjacent to one side of the light guide plate and including first and second areas alternately defined therein, light sources mounted on the printed circuit board to correspond to the first area and to supply the light to the light guide plate, a first barrier wall disposed on the printed circuit board and extending in a direction in which the light sources are arranged, and a second barrier wall facing the first barrier wall such that the light sources are disposed between the first and second barrier walls, the second barrier wall disposed on the printed circuit board, and extending in the direction.

Abstract: A backlight unit includes: a lower case including a bottom portion and a side portion on an edge of the bottom portion, a light guide plate accommodated in the lower case, and a light source module including a circuit board between the light guide plate and the side portion of the lower case and a light source on the circuit board, where the light guide plate includes a first light collecting pattern on a lower surface of the light guide plate, and a second light collecting pattern on the lower surface of the light guide plate and between the light source module and the first light collecting pattern.

Abstract: A light generation member includes a light source which includes light source units which generate a first light, a light conversion member which converts the first light to a second light, and a light diffusion member which is elongated in a first direction, in which is defined first grooves respectively corresponding to the light source units, the light diffusion member diffusing the first light generated by the light source unites and providing the diffused first light to the light conversion member. The light diffusion member is between the light conversion member and the light source in a second direction crossing the first direction, and the first grooves defined in the light diffusion member are each elongated in a third direction substantially perpendicular to the first and second directions.

Abstract: A light source module includes a frame having a plurality of mounting surfaces at different levels and side surfaces respectively connected to the plurality of mounting surfaces; a plurality of heat dissipaters respectively disposed on the plurality of mounting surfaces and extending to cover a side surface of the frame; and a light source including a plurality of light emitting devices respectively disposed on the plurality of heat dissipaters and respectively positioned above the plurality of mounting surfaces.

Abstract: A backlight module and a display device are disclosed. The backlight module comprises a lamp group; at least one prism sheet having a first edge near a side of the lamp group; a light shielding sheet having an inner edge corresponding to the side of the lamp group for defining a light emitting region of the backlight module. A distance between the first edge of the prism sheet and the lamp group is greater than or equal to a distance between the inner edge of the light shielding sheet and the lamp group. A light leakage in front of the lamps is improved effectively by increasing the distance between the prism sheet and lamp group, so that light intensity of light emitted from the lamp group is reduced upon reaching the prism sheet.

Abstract: A light guide plate includes a plate body and a wedge-shaped body extended upward along a terminal of the plate body. A top surface of the plate body is connected smoothly with an inclined surface of the wedge-shaped body. The inclined surface is provided with multiple first inclined V-shaped structures arranged at intervals, and the top surface is provided with multiple first vertical V-shaped structures. The present invention also provides a backlight module having the light guide plate. When a light source is right opposite to a first spaced region (or a second spaced region) corresponding to and located between two first inclined V-shaped structures (or two second inclined V-shaped structures), lights emitted from the light source can be uniformed by the first inclined V-shaped structure and the second inclined V-shape structure in order to eliminate an uneven light and dark phenomenon generated on the inclined surface.