Abstract: An ultra thin lighting element including at least one light source (1b). A lightguide element (2c) includes one lightguide layer comprising a plurality of discrete fine optic surface relief structures (3e) on at least one portion of at least one surface. Each surface relief structure (3e) includes basic structural features on the order of about 10 microns or less in height, and on the order of about 10 microns or less in each lateral dimension. The number, arrangement and size of each surface relief structure (3e) and height and lateral dimensions of the structural features of the surface relief structures (3e) being varied to provide a desired degree of outcoupling modulation of light incoupled into the light guide element.

Abstract: The asymmetric prism structure contains multiple asymmetric prisms arranged in parallel where each asymmetric prism has a first slant face, a second slant face, and a bottom face, connected end-to-end together. The first slant face directs light beams propagating perpendicular to the prism direction to a lateral side, and the second slant face directs light beams propagating perpendicular to the prism direction to the other lateral side. The present invention further provides a light guide plate, a backlight module, and a related application utilizing the asymmetric prism structure. When vertical asymmetry is present in the timing sequences for the backlight scanning and the signal to the LCD panel, the asymmetric prism structure can reduce the cross-talk near a side from the error signal, thereby enhancing the video quality.

Abstract: The present invention relates to a light guide plate and a corresponding backlight module. The light guide plate has a plate body, a light-exiting prism structure and a reflecting prism structure. The reflecting prism structure is mounted on a reflecting area on a light-exiting surface of the plate body. The light guide plate and the corresponding backlight module can reduce light leakage at the junction between the light guide and a fixing plastic frame by the reflecting prism structure mounted at sides of the light guide plate.

Abstract: Provided is a lighting device, including: a printed circuit board; one or more light emitting units formed on the printed circuit board; a resin layer which is formed on the printed circuit board, in which the light emitting units are embedded; a diffusion plate formed on an upper side of the resin layer, whereby an entire thickness of the lighting device can be reduced, and when the product is designed, a degree of freedom in design can be improved because flexibility is secured.

Abstract: A light-guiding article has a film substrate that has at least one patterned surface having a plurality of discrete surface features and an incident edge that is substantially orthogonal to the at least one patterned surface. Each surface feature in the plurality of discrete surface features extends along a length direction that is substantially parallel to the incident edge. Taken in cross-section along the length direction, each surface feature has a positively sloped portion, a substantially flat portion, and a negatively sloped portion. A first widthwise cross-section taken at a first position through the positively sloped portion has the same shape as a second widthwise cross-section taken at a second position through the negatively sloped portion.

Abstract: A composite light guide plate comprises a light guide plate and a prism structure adhering to the light guide plate. The light guide plate comprises a light emitting surface. A plurality of first microstructures is formed on the light emitting surface. The prism structure is adhered on the light emitting surface of the light guide plate. The prism structure comprises a first surface in contact with the light emitting surface. A plurality of second microstructures is formed on the first surface. Each second microstructure is corresponding to and in tight contact with one of the first microstructure. An apparatus and a method for manufacturing the composite light guide plate is also provided.

Abstract: A backlight (120) that includes a front reflector (130) and a back reflector (160) that form a hollow light recycling cavity (162) having an output surface (164) is disclosed. The front reflector includes at least four directional recycling films (132). The backlight also includes a semi-specular diffuser disposed between the front reflector and the back reflector, and one or more light sources (166) disposed to emit light into the light recycling cavity.

Abstract: An optical assembly includes a light emitting panel having a light output surface with non-uniform directional light output distribution, and a light redirecting film located to receive light emitted from the light output surface. The light redirecting film has a pattern of individual non-prismatic optical elements of well defined shape with a total of two surfaces that intersect each other, the shape varying at different locations on the light redirecting film to redistribute the light received from the light output surface within a desired light ray angle distribution.

Abstract: A light guide bar and an optical touch panel utilizing the light guide bar are provided. The light guide bar is applied to an optical touch panel with a sensing area. The light guide bar includes a bar body and a plurality of prisms. The bar body has a first receiving end, a light-exiting surface, and a structure surface. The light-exiting surface is opposite to the structure surface and faces the sensing area while the first receiving end is connected between an end of the light-exiting surface and an end of the structure surface. The prisms are formed on the structure surface. Each prism includes a first surface and a second surface respectively having a first angle and a second angle with respect to the structure surface, wherein the second surface is closer to the first receiving end than the first surface, and the second angle is larger than or equal to the first angle.

Abstract: A light guide plate includes a main body portion and inclined light guide portions having at least one recess. The main body portion has a first light incident surface, a bottom surface that is adjacent to the first light incident surface, and a light emitting surface that is opposite to the bottom surface. The inclined light guide portions disposed on the main body portion have a second light incident surface and at least one inclined surface. The second light incident surface is connected to the first light incident surface of the main body portion. The inclined surface is connected to the light emitting surface of the main body portion. At least one recess is formed between the inclined light guide portions. In addition, a wedge-shaped body can further be formed between the main body portion and the inclined light guide portions.

Abstract: A flat illumination device is provided, and includes a frame, a light guide plate, and at least one light source. The frame includes an inner wall, wherein the inner wall has a reflective surface. The light guide plate is disposed in the frame, and has a first surface, a second surface opposite to the first surface, and at least one light incident surface adjoining the first and second surfaces. The first surface faces the reflective surface, and there is a distance between the first surface and the reflective surface. At least one pattern formed from mesh points or microstructures is disposed on at least one of the first surface and the second surface. The light source is disposed in the frame, and is adjacent to the light incident surface for providing light to the light guide plate.

Abstract: An illumination unit of the present invention includes a tabular light guide plate having a light emitting surface for emitting light coming from an LED as planar light, wherein a recessed portion is formed in the opposite surface of the light emitting surface of the light guide plate, and wherein the LED is provided in the recessed portion so that the optical axis of the LED becomes parallel to the light emitting surface of the light guide plate. Then, a dimming pattern is provided at a location corresponding to the LED of the light emitting surface of the light guide plate, and the dimming pattern includes a main portion covering the LED on the light emitting surface side, and protrusions radially extending toward a light emitting direction of the LED around the LED.

Abstract: In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.

Abstract: A surface light source device having a local dimming function and an LCD unit using the device can include a light guide having a top surface including a plurality of linear convexes and a bottom surface including a plurality of dots. The device can also include a reflective sheet located adjacent the bottom surface, a prism sheet located adjacent the top surface, a diffusing sheet located adjacent the prism sheet, and a pair of LED light sources located adjacent both light incident surfaces of the light guide and divided into a plurality of groups. Each light emitted from the groups can be configured to be emitted independently from a respective one of local domains on a light-emitting surface of the device. Therefore, the disclosed subject matter can provide a surface light source device having a local dimming function with a simple structure as with a conventional edge light type device.

Abstract: An optical film is formed with a plurality of optical patterns having peak and valley portions and a lighting device may include such an optical film. Pitches of the optical patterns, heights of the peak portions and depths of the valley portions are irregular, and plan and side structures of the optical patterns have a non-linear non-symmetrical arrangement structure in which the peak and valley portions are irregularly bent. According to an optical film and a lighting device including such an optical film, a moiré phenomenon can be prevented in advance, abrasion resistance can be improved, optical defects such as scratches cannot be observed with the naked eye, a wet-out phenomenon can be prevented, and a viewing angle can be broadened.

Abstract: An apparatus includes a light guide. A first light input section receives light in a first direction into said light guide. First direction-dependent outcoupling structures selectively couple out light propagating in said first direction in said light guide. A second light input section receives light in a second direction into said light guide. Said second direction is different than said first direction. Second direction-dependent outcoupling structures selectively couple out light propagating in said second direction in said light guide.

Abstract: A multi-domain dynamic-driving backlight module is provided, which includes a bezel, a reflective plate, a plurality of light emitting units, and a plurality of light guide plates. The reflective plate is disposed on the bezel. The light guide plates respectively have a short side and a long side extending in a predetermined direction, wherein each of the light emitting surfaces of the light guide plates includes a plurality of patterned structures extending in a direction parallel to the light projection direction of the light emitting units. Each of the light emitting surfaces includes a patterned surface includes a plurality of patterned structures extending in a direction parallel to the light projection direction of the light emitting units.

Abstract: A back reflector for a lightguide in a turning film backlight includes a prism film layer in direct contact with a reflective layer. The lightguide includes a light guiding region having a refractive index that is substantially spatially uniform. The reflective layer may be specular or diffuse and may include a multilayer polymeric film.

Abstract: A light guiding plate and a backlight module and a display device applying the light guiding plate are provided, in which a structure of prisms on a light emergence surface of the light guiding plate is designed by, for example, adopting a mixed structure of prisms in different specifications, regulating the specifications of the prisms, such as a vertex angle and a corresponding reprint ratio, varying the reprint ratio of the prisms with respect to a distance from a light incident surface of the light guiding plate, or combining the aforementioned design solutions, thereby adjusting a light emitting effect of the light guiding plate, increasing uniformity of backlight, and improving display quality of the display device.

Abstract: A surface light source device has a light emitting surface and includes a light guide plate having a light exit surface and a pair of light entrance surfaces. When the angular distribution of luminance in a plane parallel to a first direction is measured on the light emitting surface at varying positions along the first direction, the peak angle ?c in the angular distribution of luminance at a center position Pc in the first direction lies between the peak angle ?a in the angular distribution of luminance at an end position on one side in the first direction and the peak angle ?b in the angular distribution of luminance at an end position on the other side in the first direction.

Abstract: The present invention is a display assembly in which a backlight module generates light beams via a light source. The light source provides the light beams to a light guide of the backlight module. The light guide then provides the light beams to a display panel of the display assembly for illuminating the display panel. One or more optical elements are implemented between the light source and an insertion edge of the light guide for promoting improved light insertion efficiency for the display assembly. Further, the optical element(s) may promote improvements in color quality, luminance and/or uniformity of graphics or graphical depictions displayed by the display assembly.

Abstract: A light guide plate for a backlight. The light guide plate includes: a light source unit for generating light; a light guide plate proximate to the light source unit and including an upper surface and a lower surface; and a light emission pattern configured to diffuse a portion of the light directed toward an image display panel, and a first straight pattern configured to channel the light along a direction substantially parallel to a direction of propagation of the light generated by the light source unit, both the light emission pattern and the first straight pattern being disposed on one of the upper surface and the lower surface of the light guide plate, in which the first straight pattern has peaks and valleys formed in alternating and repeating manner in a direction substantially perpendicular to a direction of propagation of the light generated by the light source unit.

Abstract: Light redirecting film comprises a thin optically transparent substrate having a pattern of individual optical elements formed as projections on a light exit surface of the film. At least some of the projections comprise a dome-shaped surface on the light exit surface.

Abstract: A light-guide illumination device and system comprises a light source, a light redirecting slab and a light guide slab assembly. The light redirecting slab includes a generally planar face having optical redirecting elements, the optical redirecting elements having respective optical coupling surfaces situated distally from the planar face. The light guide slab assembly includes a planar face having an optically transmissive interface layer assembled onto a first planar face of the light guide slab and optically coupled to receive transmitted light directed from the light source. The light guide slab is pressed onto the redirecting slab such that the interface layer is deformed, creating optical bonds at the optical coupling surfaces of the optical redirecting elements, the formed optical bonds providing optical apertures for light transmission therethrough.

Abstract: An optical substrate having a structured light output surface that comprises rows of laterally arranged snaking, wavy or meandering longitudinal prism structures. The prism structures at the light output surface may be viewed as comprising rows of laterally meandering longitudinal prisms and/or sections of curved segments coupled end-to-end to form the overall meandering longitudinal prism structures. The laterally meandering rows of longitudinal prism structures are arranged in parallel laterally (side-by-side), defining parallel peaks and valleys (a facet is defined between each adjacent peak and valley). In one embodiment, the lateral waviness is regular with a constant or variable wavelength and/or wave amplitude (or extent of lateral deformation). The lateral waviness may generally follow a sinusoidal profile, or other curved profile.

Abstract: The backlight module comprises a light guide device, pluralities of light sources and at least one optical film. The light guide device further contains body, first microstructures, second microstructures, flat portions and diffusive beads. The first microstructures are disposed on reflective surface. A first point and a second point are disposed at two ends of the first microstructure with a first width (P1). Each flat portion has a gap (G) defined between two adjacent first microstructures. The second microstructure connects to the body by means of two edge portions. Two edge portions have a second width (P2) defined on the incident surface; wherein a first depth (H1) is defined to be the distance between the crossing point of two edge portions away from the incident surface. Pluralities of diffusive beads have weight Mb. The body has weight Mt. Then the equations of H 1 P 2 * P 1 G ? 0.288 and H 1 P 2 * P 1 G * M t M b ? 96.0 are satisfied.

Abstract: A display device with switchable viewing includes a backlight module and a display panel. The backlight module includes a light guide plate, first optical structures, a reflector, a first light source, and a second light source. The light guide plate includes a bottom surface, a light exit surface, a first light incident surface, and a second light incident surface. The display panel is disposed on the light exit surface. The first optical structures are disposed on the bottom surface and each includes a first inclined surface and a second inclined surface. The angle between the first inclined surface and the bottom surface is smaller than that between the second inclined surface and the bottom surface. Lights from the first light source and the second light source enter the light guide plate from the first light incident surface and the second light incident surface, respectively.

Abstract: A display apparatus including a display panel, a plurality of light sources provided below the display panel to emit light, and an optical plate provided between the display panel and the light sources to diffuse light are disclosed according to one or more embodiments. The optical plate comprises a base including a plurality of regions having different thicknesses, and a convex pattern formed on the base.

Abstract: An optical sheet includes a light-passing base sheet, a plurality of light-passing first patterns formed on a front major surface of the base sheet, and a plurality of light-passing second patterns formed on a rear major surface of the base sheet. The first patterns protrude from the front surface of the base sheet, a top portion of each of the second patterns makes contact with the rear surface of the second patterns while a larger lower surface of each of the second patterns is exposed to serve as a light receiving surface. Voids having relatively low refractive indices are formed between the light-passing second patterns. The optical sheet employs just one base sheet in one embodiment, thereby reducing a manufacturing cost of the optical sheet.

Abstract: Disclosed herein is a light guide, which includes a light-receiving surface and a light-emitting surface. The light-emitting surface includes a plurality of gratings spaced apart from each other by a spacing interval. Each grating has a number of prisms extending in a predetermined direction. The predetermined direction of at least one grating is different from that of another grating. These gratings cooperate together to allow light in a wavelength range to transmit the gratings, and to restrict light in another wavelength range to transmit the gratings. An electrophoretic display apparatus switchable between black-white mode and color mode is disclosed as well.

Abstract: Environmentally sealed optical systems, and methods for sealing them, are disclosed. Such optical systems include area lighting panels and other optical systems. For example, in one exemplary aspect of the invention, a sealed optical system includes a substrate having first and second light sources disposed thereon, and a light-shaping panel with first and second optics formed therein that are positioned (e.g., aligned) to receive light from the first and second light sources, respectively. A sealing membrane is disposed between the substrate and the light-shaping panel, with a first adhesive surface contacting the substrate and a second adhesive surface contacting the light-shaping panel. The sealing membrane has first and second openings formed therein that allow light to pass from the first and second light sources to the first and second optics, respectively, while allowing the sealing membrane to independently seal the light sources from one another and from the external environment.

Abstract: An illuminator is provided including: a light source unit composed of a point light source; a light guide plate including an incidence surface into which light emitted from the light source unit is introduced, and an exit surface out which the light that has been introduced from the incidence surface exits; and a prism body where a plurality of prisms are arranged so as to refract the light that has exited out from the exit surface of the light guide plate, wherein the prism body is arranged at a specific area on the entire exit surface of the light guide plate so as to refract part of the light that has exited out from the exit surface of the light guide plate.

Abstract: A lightguide to be used in a liquid crystal display device includes a light exit surface, a reflection surface opposed to the light exit surface, and a light entrance surface, which is one side surface. In a region of the light exit surface or the reflection surface, which is on a front side of an intermediate portion between two light sources when viewed from the light entrance surface, a plurality of local-area line-shaped protrusions are arranged, which are extending in a first direction. Each of the local-area line-shaped protrusions reflects the entered light so that a component of the entered light which is orthogonal to the first direction is weakened. A length of a local-area line-shaped protrusion farthest from the two adjacent light sources, is larger than a length of a local-area line-shaped protrusion closest to any one of the two adjacent light sources.

Abstract: The present invention provides an optical film comprising a substrate having a first optical surface and a second surface and a micro structure layer on the first optical surface of the substrate, wherein the micro structure layer comprises a plurality of first light-adjusting structures selected from the group consisting of prism columnar structures, conical columnar structures, solid angle structures and orange-segment like structures and a combination thereof and a plurality of second light-adjusting structures selected from the group consisting of arc columnar structures, lens-like structures, and capsule-like structures and a combination thereof, wherein at least a portion of the second light-adjusting structures has a height greater than those of all the first light-adjusting structures. The optical film of the present invention will not suffer the damage caused on the microstructure layers while achieving a light-gathering effect and effectively reducing optical interference.

Abstract: An exemplary prism sheet includes a base including an upper surface and a plurality of lenses disposed on the upper surface. The upper surface is a wavy surface. A liquid crystal display device using the prism sheet is also provided.

Abstract: A liquid crystal display device capable of preventing a split between a light guide plate and a prism sheet disposed at an upper side thereof and improving concentration efficiency, the device including a liquid crystal panel configured to represent an image, a lamp disposed below the liquid crystal panel to provide light to the liquid crystal panel, a light guide plate having the lamp disposed at least at one side thereof, and a birefringence optical sheet disposed between the liquid crystal panel and the light guide plate, and having a first prism pattern with a first refractive index, the pattern facing the liquid crystal panel, and a second prism pattern with a second refractive index higher than the first refractive index, the pattern facing the light guide plate.

Abstract: A display unit in which the view angle in the horizontal direction of emitting light is wider than the view angle in the vertical direction thereof, in which the emitting light has a polarization component in the vertical direction viewable with the use of a polarized sunglass, and which is able to improve display luminance is provided. A luminance enhancement film has a plurality of convex sections which extend toward the horizontal direction and are arranged in the direction crossing the extending direction, and in which the refractive index in the extending direction is larger than the refractive index in the arrangement direction.

Abstract: Light guides and backlight systems are disclosed that include one or more groups of geometric light redirectors whose arrangement and/or orientation across the surface of a light guide varies to improve light emission uniformity and to reduce visual artifacts.

Abstract: An illumination apparatus includes a light guide plate having a plurality of first and second diffusion net points formed on a surface of a light transmissive substrate, and at least one light emitting element disposed to emit light into a light incident surface of the light guide plate. A portion of the first diffusion net points at least partially overlaps the second diffusion net points, and the size of the first diffusion net points is smaller than the size of the second diffusion net points.

Abstract: In a light guide plate and a display apparatus having the light guide plate, a light guide plate includes reflective prisms, in which at least one of the reflective prisms includes an inclined angle adjustable according to an inclined surface of a defective portion thereof and compensates for a distortion of light caused by the defective portion.

Abstract: There is provided an illuminator comprising: a light source that radially emits white lights in a forward direction; and a lens sheet that is arranged facing the light source and that has a plurality of prisms on one side thereof concentrically at an optical axis so as to control orientation of the white lights that are emitted from the light source, wherein the light source is composed of: a luminous element that emits lights with a predetermined wavelength; and a sealing body that covers the luminous element and that includes phosphors therewith, the phosphors being adapted to receive the lights with the predetermined wavelength which are emitted from the luminous element so as to emit fluorescence, and the lens sheet includes prisms that have focal distances each different from the prisms adjacent thereto.

Abstract: A light guide plate includes a first surface, a second surface, at least a light incident surface, and a plurality of groove sets. The second surface is opposite to the first surface. The light incident surface connects the first surface and the second surface. The groove sets are separately disposed on the second surface. Each of the groove sets includes a plurality of curved grooves. Each of the curved grooves has a curved inclined reflective surface and a curved light-back-surface. The curved inclined reflective surface is inclined with respect to the first surface. The curved grooves of each of the groove sets curve towards a same curving direction. The curved inclined reflective surface of one of two curved grooves is connected to the curved light-back-surface of the other one of the two curved grooves. A backlight module is also provided.

Abstract: An LED illuminating device comprises a housing with a base plate, a prism sheet and a circuit board. The prism sheet is mounted in the housing and comprises a number of V-shaped micro-grooves formed thereon along three directions intersecting with each other. The circuit board is fixed on the base plate, wherein a plurality of LED units are arranged on the circuit board, each two adjacent LED units are spaced a preset distance apart from each other and emit light of different colors. Six virtual mixed light sources are formed by reflection of the prism sheet to the circuit board when the light emitted by an LED unit mixes with light emitted from adjacent LED units on the circuit board. Each of the virtual mixed light sources has a color different from the colors of the light emitted from the LED units.

Abstract: A light guide plate is adapted for a backlight module having at least one light emitting device, and the light guide plate includes a light emitting surface, a surface opposite to the light emitting surface, a light incident surface connected with the light emitting surface and the surface, and a plurality of microstructures disposed on the light emitting surface or the surface. 90 percent or more of the surface or the light emitting surface is flat. At least one of the light emitting devices is disposed beside the light incident surface and capable of emitting a light beam. The light incident surface is capable of making the light beam enter the light guide plate and the light emitting surface is capable of making the light beam transmit outside the light guide plate. A backlight module is also provided.

Abstract: A liquid crystal display device including a plurality of pixels arranged in a matrix along a first direction and a second direction which are perpendicular to each other a TFT substrate, a counter substrate, a liquid crystal layer, a plurality of microlenses, and a backlight provided on a side of the plurality of microlenses which is opposite to the TFT substrate. The plurality of microlenses includes a plurality of lenticular lenses extending in the first direction, the plurality of lenticular lenses being arranged side by side along the second direction.

Abstract: A backlight module includes a light guide plate with a main body and a light source with a circuit board and a plurality of light bars. The main body has a light incidence surface and a light emitting surface. The light incidence surface has a plurality of accommodating grooves and the light emitting surface or the light incidence surface has a plurality of light-separation grooves which are perpendicular to the accommodating grooves. The accommodating groove has a first and a second light incidence parts. A reflecting layer is disposed on the surface of the circuit board being located between each two light bars. The light source is disposed on the light incidence surface and light bars are disposed for the accommodating grooves so as a predetermined distance located between the light bar and the second light incidence part is formed a light mixing space to reduce the production of bright lines.

Abstract: The present invention relates to a light guide plate and back light module having the same. The light guide plate includes a light guide plate body and a plurality of microreliefs. The light guide plate body has a light-emitting surface and a reflecting surface. The microreliefs are disposed on the reflecting surface. Each of the microreliefs has an outer surface and a base area. The outer surface is a curved surface, and the base area contacts the reflecting surface. A ratio of the totally height of each of the microreliefs to the diameter of the base area of each of the microreliefs is between 1/7 and ¼. As a result, the light guide plate has higher light extraction efficiency.

Abstract: An exemplary optical plate includes a base and an array of micro-structures. The base includes a first surface and a second surface opposite to the first surface. The micro-structures are provided at the first surface. Each micro-structure includes a base surface substantially coplanar with the first surface of the base and two side surfaces. The base surface has an approximately olive-shaped profile enclosed by two arc-outlines. The two side surfaces extend obliquely from the two arc-outlines and intersect at a ridge of the micro-structure.

Abstract: An optical element includes a first optical member with at least one indentation at a first surface thereof, and a second optical member attached to the first surface. The second optical member conforms to the at least one indentation in the first optical member. The optical element further includes at least one reflector at an interface between the first and second optical members, where the at least one reflector is located at the at least one indentation. The reflector is formed by an interface between a cavity formed between the first and second optical members and at least one of the first and second optical members.

Abstract: The present invention provides a light control film that can prevent generation of a moiré pattern when it is superimposed on another member having a regular structure while securing sufficient front luminance, and a backlight device using the same. The light control film of the present invention has a light control layer provided with an uneven pattern on a surface, and in this uneven pattern, a plurality of convexes having circular bases of approximately the same diameters are arranged so that the bases thereof should not overlap with one another and each should touch one or two or more other bases, and ratio of convexes arranged so that each of circular bases thereof should touch both bases of two convexes of which bases touch each other is controlled to be 50 to 92% among the total convexes arranged. The backlight device of the present invention is a backlight device incorporated with the aforementioned light control film.