Abstract: The present disclosure provides a backlight, a display module and a display device. The backlight includes a plastic frame and light guide plate, the plastic frame includes a panel receiving portion, the light guide plate is located below the panel receiving portion, an orthographic projection of the panel receiving portion in a direction perpendicular to a light emitting surface of the light guide plate is overlapped with an orthographic projection of an edge of the light guide plate in the same projection direction, and an angle between a side surface of the panel receiving portion close to a center of the light guide plate and a lower surface of the panel receiving portion adjacent to the light guide plate is less than 90 degrees.

Abstract: A backlight module and a display device are provided. The backlight module includes a back plate, a carrying member, a light guide plate, at least one optical film and a light source. The carrying member is disposed on the back plate, in which the carrying member includes a first step portion and a second step portion, and the first step portion is elevated higher than the second step portion. The light guide plate is disposed on the back plate. The at least one optical film is disposed above the light guide plate, in which the at least one optical film is held on the second step portion. The light source is disposed on the back plate, in which the light source is disposed adjacent to a light-incident surface of the light guide plate.

Abstract: The present application discloses a liquid crystal display apparatus, includes a backlight source to emit blue light; a composite film layer to receive the blue light and wherein the composite film layer includes an intermediate region, and an edge region, the edge region is disposed around the intermediate region, the intermediate region doped with quantum dot, the edge region doped with phosphors, the composite film layer emit white light after absorbing blue light; and a color filter substrate to receive white light and the color filter substrate includes a color resist layer, wherein the color resist layer includes a first region and a second region, the first region is provided corresponding to the intermediate region, the second region is provided corresponding to the edge region, and the thickness of the first region is smaller than the second thickness of the second region.

Abstract: A display apparatus, comprising: a display panel including a display region displaying an image in front side at a center part of the display panel, and including a non-display region around the display region; a light guide plate arranged in rear side of the display panel, and being opposed to the display panel; an optical sheet arranged between the light guide plate and the display panel; and a support part arranged between the optical sheet and the light guide plate, and supporting an edge part of the optical sheet, wherein the optical sheet is opposed to the display region and the non-display region, and at least a part of the support part is located in the display region over a boundary between the non-display region and the display region.

Abstract: A manufacturing method of a solid-state imaging device includes: preparing a photoelectric conversion device; forming an insulating layer on a surface of the photoelectric conversion device; forming a wire-grid polarizer on a support base; bonding a forming surface of the wire-grid polarizer on the support base to the insulating layer on the surface of the photoelectric conversion device and removing the support base from the wire-grid polarizer.

Abstract: An edge-type backlight module and a liquid crystal display using the same. The edge-type backlight module comprising a printed circuit board having a supporting surface; plural light emitting diodes disposed on the supporting surface, each of the light emitting diodes comprising a light emitting surface and the light emitted by the light emitting diode being emitted from the light emitting surface; a reflective film disposed on the supporting surface; a light guide plate disposed above the reflective film so that the reflective film being disposed between the light guide plate and the supporting surface; a reflective surface disposed on a side edge of the light guide plate and kept a distance from the light emitting diode, the reflective surface used for reflecting the light emitted from the light emitting surface; and a dark surface disposed on the supporting surface for absorbing the light reflected by the reflective surface.

Abstract: A device disclosed herein includes a component having a frame and an array of protruding teeth extending from the frame. Each tooth of the array of protruding teeth has an angled edge. The device also includes a lightguide formed from a film. The lightguide includes an array of strips extending from an area of the film. The array of strips is positioned adjacent the array of protruding teeth, and the component at least partially restrains the film when each strip of the array of strips is folded across an angled edge of a corresponding tooth of the array of protruding teeth.

Abstract: Illumination devices and methods of making same are disclosed. In one embodiment, an illumination apparatus includes a light source, a light guide having a planar first surface, a first end and a second end, and a length therebetween, the light guide positioned to receive light from the light source into the light guide first end, and the light guide configured such that light from the light source provided into the first end of the light guide propagates towards the second end, and a plurality of light turning features that are configured to reflect light propagating towards the second end of the light guide out of the planar first surface of the light guide, each light turning feature having a turning surface and an interferometric stack formed on the turning surface.

Abstract: Disclosed is a backlight module having light sources and a light guide plate, and the light guide plate has an incident side, and the lights emitted by the light sources pass through the incident side and enter into the light guide plate, and the a light direction changing layer is positioned at the incident side, and the light direction changing layer is employed for changing progress directions of the lights entering the incident side to shorten a distance perpendicular to the incident side from an intersection point of the lights emitted by adjacent light sources to the light sources. The present invention also discloses a liquid crystal display.

Abstract: A backlight module includes a light guide plate and a light emitting unit. The light guide plate has a first side surface, a second side surface, and a third side surface. The first side surface is located opposite to the second side surface. A height of the first side surface is greater than a height of the second side surface. The third side surface is located between the first side surface and the second side surface and has a light entrance surface and a light exit surface. The light entrance surface is connected to the first side surface and the light exit surface. The light exit surface is connected to the second side surface. An included angle is formed between the light entrance surface and the light exit surface. The light emitting unit is disposed on the light entrance surface.

Abstract: A backlight unit includes: a wiring board having a light source mounted thereon; a light guide plate; a light-shielding pressure-sensitive adhesive sheet; and a light diffusion sheet. The front surface of the light guide plate includes an effective region serving as the planar light source and a light entering region ranging from the end surface into which the light enters to the effective region. The wiring board and the light-shielding pressure-sensitive adhesive sheet each have a part positioned in the light entering region. The light diffusion sheet is arranged from the effective region to the light entering region, and overlaps with the light-shielding pressure-sensitive adhesive sheet in the light entering region. On a side closer to the effective region with respect to the light-shielding pressure-sensitive adhesive sheet, the light entering region is covered with the light diffusion sheet without a gap.

Abstract: A display housing for a portable computing device that utilizes a plastic cover bonded to an internal metal frame is described. To account for thermal cycling issues and in particular to prevent bond slippage, multiple types of adhesives are employed to join the metal frame and the plastic cover. In particular, a very high bond (VHB) adhesive material is used in certain areas to bond the metal inner frame to the plastic cover and a liquid adhesive is used in other areas. The plastic cover can be translucent to light. A method of coating the plastic cover to block light, such as from a backlight used for the display, is described.

Abstract: A light guide plate and manufacture methods thereof are provided. The light guide plate includes a plate body, an optical adhesive layer, and a light entrance structure layer. The plate body has a light exit surface and a light entrance surface. The light entrance surface is connected to a side of the light exit surface and intersects the light exit surface with an angle. The optical adhesive layer is attached on the light entrance surface while the light entrance structure layer is attached to the optical adhesive layer. The light entrance structure layer includes a substrate and a light-cured or thermal-cured structure. The light-cured or thermal-cured structure is made of light or thermal curable material and firmly formed on a structured surface of the substrate through a light or thermal curing process.

Abstract: A multimode edge-light configured for providing reduced depth and improved multimode edge uniformity is provided. The multimode edge-light may be suitable for sun light readability and use with night vision goggles. The multimode edge-light includes a support base and a first and second set of light-emitting diode (LED) modules electronically connected to the support base. The first set of LED modules is positioned adjacent to the light guide, and the second set of LED modules is positioned separate from the light guide. The multimode edge-light also includes an infrared filter configured for filtering light from only the second set of LED modules positioned on a surface of the support base. In operation of the multimode edge-light, at least a portion of the first set of LED modules and at least a portion of the second set of LED modules are selectively energized for providing a plurality of operation modes.

Abstract: This disclosure provides systems, methods and apparatus for providing illumination by using a light guide to distribute light. In one aspect, the light guide has a surface, such as an edge, into which light is injected. The surface is treated to create a diffusive interface with a light source. For example, the surface may be subjected to abrasion to form a frosted surface that acts as the diffusive interface, or a diffusive structure may be attached to the edge, with the attached diffusive structure functioning as the diffusive interface. The diffusive interface diffuses light entering into the light guide, and can thereby increase the uniformity of light propagating within the light guide. The light guide may be provided with light turning features that redirect light out of the light guide. In some implementations, the redirected light may be applied to illuminate a display.

Abstract: The attenuation of light per unit length in a waveguide as a result of active pixels (i.e., open pixels) may be corrected or mitigated by injecting apodized light into the waveguide. A light injection system and method is provided to enhance the luminous uniformity of the active pixels in a waveguide-based display. Embodiments of the present invention include a slab waveguide having a first edge and a second edge that intersect at a vertex, a first light source disposed along the first edge, and a second light source disposed along the second edge. The first light source, or the second light source, or both, comprises an apodized light source.

Abstract: A backlight module includes a light guide plate and a plurality of light sources. The light guide plate includes a light incident part and a flat panel. The light incident part and the flat panel have a common bottom surface. The maximum height of the wedge-shaped light incident part is greater than a height of the flat panel. The light incident part includes a light incident surface perpendicular to the bottom surface and a sloped surface sloping relative to the light incident surface. The flat panel includes a light emitting surface opposite to the bottom surface. The light incident part further includes a reflective layer on the sloped surface. The plurality of light sources is positioned adjacent to the light incident surface.

Abstract: A direct backlight device including a light source arranged on the rear surface of a light-guiding plate and a liquid crystal display apparatus including the backlight device are provided, in which light extracting efficiency from the light-guiding plate is improved and luminance can be prevented from lowering or can be improved. The backlight device includes a light source arranged on the rear surface opposite to a light-emitting surface, and a reflective-angle modified portion, for example, a concave-convex portion formed by sandblast to modify a reflective angle of light emitted from the light source is provided at least on the light-emitting surface and/or the rear surface. A light reflective angle equal to or smaller than the critical angle is modified to improve the light extracting efficiency from the light-emitting surface.

Abstract: A backlight unit for a display device includes a light source module which emits light, a light guiding plate which guides the light incident from the light source module toward a front surface thereof, and a light beam spread angle regulating sheet disposed between the light source module and a lateral surface of the light guiding plate, where the light beam spread angle regulating sheet regulates a light beam spread angle of the light incident from the light source module.

Abstract: Provided are an optical member and a display device. The display device includes a light source, a plurality of wavelength converting particles, an approximately, and a display panel. The wavelength converting particles convert a wavelength of light emitted from the light source. The accommodating part accommodates the wavelength converting particles and has a curved surface. The display panel is configured to display images using light changed by the wavelength converting particles.

Abstract: Embodiments of the invention relate to a light guide plate, a method for fabricating the same and a backlight unit. The light guide plate comprises a low density region and a plurality of high density regions, wherein the plurality of high density regions are separately disposed on a light incident side of the light guide plate.

Abstract: A method for providing, on a carrier (40), an insulative spacer layer (26) which is patterned such that a cavity (27) is formed which enables connection of an optical semiconductor element (41) to the intended conductor structure (22) when placed inside the cavity (27). The cavity (27) is formed such that it, through its shape, extension and/or depth, accurately defines a location of an optical element (45; 61) in relation to the optical semiconductor element (41). Through the provision of such a patterned insulative spacer layer, compact and cost-efficient optical semiconductor devices can be mass-produced based on such a carrier without the need for prolonged development or acquisition of new and expensive manufacturing equipment.

Abstract: An exemplary backlight module includes a frame, a light guide plate, a light source module and an optical film. The light guide plate is arranged on the frame and includes a light-incident surface and a light-emitting surface adjacent to the light-incident surface. The light source module includes a circuit board arranged between the frame and the light guide plate board, and a light emitting element arranged on the circuit board and facing the light-incident surface. The optical film includes a wavelength shifting portion arranged between the light emitting element and the light guide plate, a second extending portion arranged between the light guide plate and the frame, and a first extending portion connected between the wavelength shifting portion and the second extending portion and arranged between the light guide plate and the circuit board. A display device equipped with the backlight module is also provided.

Abstract: A backlight device for a liquid crystal display containing a substantially planar light guide with a light emission surface and a light-collecting portion opposing the light emission surface. A pair of opposing side portions may define the periphery of the light guide. A first plurality of LEDs are placed so as to direct the emitted light into the light-collecting portion. An NVIS filter is preferably placed adjacent to at least one of the side portions. A second plurality of LEDs are placed to direct the emitted light through the NVIS filter and into a side portion of the light guide. Alternative embodiments can contain NVIS filters and LEDs along additional edge portions of the light guide. Some embodiments may use directing elements or slanted surfaces of the light guide to direct the light from the second plurality of LEDs into the edge portions of the light guide.

Abstract: A light emitting diode (LED) night vision imaging system (NVIS) lens apparatus for use in filtering of a plurality of night-mode LEDs is provided. The lens apparatus includes an optical carrier material having a plurality of apertures disposed and arranged such that, when the lens apparatus is coupled to an LED backlight, each of the plurality of apertures allows light from a corresponding day-mode LED to be transmitted therethrough without filtering. The lens apparatus also includes filter material coupled to and supported by the optical carrier material. The filter material is disposed and arranged on the optical carrier material such that, when the lens apparatus is coupled to the LED backlight, light from each of a plurality of night-mode LEDs is filtered by the filter material. Backlight assemblies and displays are also provided.

Abstract: An LED display frame structure includes a light guide plate and a heat dissipation frame. The heat dissipation frame is mounted around the periphery of the light guide plate. At least one side of the light guide plate is provided with an LED strip and a 7-like heat dissipation plate. The back of the LED strip is provided with a two-sided adhesive strip to be attached to a groove of the 7-like heat dissipation plate. The 7-like heat dissipation plate has a cover plate next to the groove. The cover plate is attached to an adhesive strip of the light guide plate. The present invention can be assembled conveniently and quickly.

Abstract: Some embodiments provide luminance-preserving non-imaging backlights that comprise a luminous source emitting light, an input port that receives the light, an injector and a beam-expanding ejector. The injector includes the input port and a larger output port with a profile that expands away from the input port acting via total internal reflection to keep x-y angular width of the source image inversely proportional to its luminance. The injector is defined by a surface of revolution with an axis on the source and a swept profile that is a first portion of an upper half of a CPC tilted by its acceptance angle. The beam-expanding ejector comprising a planar waveguide optically coupled to the output port of the injector. The ejector includes a smooth upper surface, and a reflective lower surface comprising microstructured facets that refract upwardly reflected light into a collimated direction common to the facets.

Abstract: An input device and display apparatus with multi-light segments has been disclosed. The input device may comprise a rigid light guide layer having alignment structures that define the rigid light guide layer into multiple light segments, a plurality of first layer flexible light guide films and a plurality of second layer flexible light guide films. The alignment structures may be formed together when making the rigid light guide layer in an injection molding process. By coupling multiple light sources into each of the light guides, the display may be configured to display multiple color and multiple symbols, independently. In another embodiment, the light guide may be utilized in a display apparatus without a LCD.

Abstract: A backlight module includes a plurality of first light sources emitting first light and a light guide plate. The first light sources are arranged in a line and spaced from each other. Two adjacent first light sources define a first space therebetween. The light guide plate includes a first light incident surface and a light output surface. The first light incident surface has a plurality of bright areas respectively corresponding to the first light sources and a plurality of dark areas respectively corresponding to the first spaces. A plurality of first reflectors is disposed on the plurality of dark areas of the first incident surface. The light output surface is adjacent and perpendicular to the light incident surface.

Abstract: A light distributor includes a panel (202) having a textured surface (206) and a light distribution surface. A number of LEDs (204) are located in proximity to the textured surface. Some of the light (208, 212) impinging on the textured surface (206) is refracted or reflected (214, 216) into the panel (202) from where it can be transmitted through the distribution surface.

Abstract: A display apparatus includes a display panel, a light guide plate, a frame and an optical film disposed between the display panel and the light guide plate. The display panel is defined to have a display area and a non-display area adjacent to the display area. The frame surrounds the light guide plate, the optical film and the display panel. The frame includes a sidewall and a support structure extending from an inner surface of the sidewall to above the light guide plate. The support structure includes a light shielding part, a first support part configured to support the optical film. The light shielding part is connected to the first support part. A light-pervious area is formed between the light shielding part and the optical film. The first support part is under cover of the non-display area.

Abstract: In one aspect, an illumination apparatus includes a waveguide, embedded in which are a light-emitting source and a photoluminescent material. Output light is emitted from at least a portion of a first surface of the waveguide.

Abstract: Provided is a display device for an embodiment in which a central axis of a light guide plate (LGP) and a central axis of one or more light sources are matched with each other to maximize efficiency of the light sources, and which has an ultra-slim structure. The display device may include: a display panel which displays an image; an LGP which guides light to the display panel; light sources which are disposed on a side of the LGP and provide light to the LGP; a circuit board which is disposed on a side of the display panel with the light sources mounted on a surface thereof, and driving chips which drive the display panel mounted on an opposite surface thereof; and a frame which houses the LGP and the light sources and on which the circuit board and the display panel are mounted.

Abstract: In a light-guide module, a method of manufacturing the light-guide module and a backlight assembly having the light-guide module, the light-guide module includes a light-guide plate (“LGP”) and a thin-film layer. The LGP has a light-incident surface into which lights are incident and a light-exiting surface through which lights exit. The thin-film layer is formed on the LGP. The thin-film layer has a concavo-convex pattern formed on an opposite surface of a surface contacting the LGP. Accordingly, a thin-film layer having a concavo-convex pattern is formed on a light-incident surface of an LGP, so that a reflectance of light incident into the LGP may be decreased. Moreover, a light amount transmitted through the LGP is increased in accordance with a decreasing of reflectance, so that a light transmittance may be increased in total.

Abstract: A light guide member of the present invention is made of a light transmitting material. The light guide includes a light emitting surface 13, which extends in direction x and includes a lens surface 31 for converging light in direction y. The light guide also includes a light incident surface 11 provided at one of the ends spaced from each other in the direction x. The light emitting surface 13 includes a transitional region 13a adjacent to the light incident surface 11, where the transitional region includes the lens surface 31 and a round pillar surface 32. In the transitional region 13a, the lens surface 31 becomes less dominant in area as proceeding in the direction x toward the light incident surface 11.

Abstract: The present invention relates to an apparatus for fabricating a light guide panel which can improve light efficiency and brightness, and a backlight unit having the light guide panel. The backlight unit includes a light source for generating a light, and a light guide panel for guiding the light incident thereon from the light source, the light guide panel having an upper pattern which is formed on a front side thereof for emitting the light guided thus to upward and a lower pattern which is formed on a backside thereof for reflecting or refracting the light, wherein the lower pattern of the light guide panel is formed in an intaglio pattern having a vertical angle at which two inclined planes meet, and one of the two inclined planes the light from the light source incident thereon has an angle of 45˜55°.

Abstract: A guide light plate structure includes a light guide plate and a fluorescent layer. The light guide plate includes a light incident surface, a bottom surface, and a light emitting surface opposite to the bottom surface. The fluorescent layer is formed on the bottom surface. The fluorescent layer is conFIGUREd for being excited by the incident light to emit white light toward the light emitting surface.

Abstract: A self-cleaning material is generally described that may include a substrate having a first surface and a second surface. A self cleaning layer may be disposed on the first surface of the substrate. A diffraction grating may be formed in an exposed surface of the self cleaning layer, where absorption of light by the self cleaning layer incident on the exposed surface may be enhanced by the diffraction grating in accordance with a blaze condition corresponding to the diffraction grating.

Abstract: A light guide panel (LGP) has a light incident surface for receiving light. The LGP is configured at a side of a display surface of a reflective display panel. Besides, the LGP includes a main body, a first film, and a plurality of circular light guide patterns. The first film is configured on one side surface of the main body away from the display surface. The circular light guide patterns are configured on the first film, so that the light transmitted in the LGP exits and substantially moves toward the display surface. Each of the circular light guide patterns has a center and a circumference. An included angle is between two lines that respectively connect the center to the circumference located at two sides of the center, and the included angle is 140°˜179°.

Abstract: To provide a backlight device with which a color hue and a color purity of a display panel can be improved while suppressing the lowering of the brightness of the display panel. A backlight device (20) comprises a pseudo white LED (21), a light guide plate (22), and a dichroic filter (25) which reflects a light with a predetermined wavelength among the light emitted from the pseudo white LED at a predetermined ratio. The dichroic filter is configured so that the light reflectance changes when the incident angle of the light is changed and a tilt angle to a light emitting surface (21e) of the pseudo white LED can be adjusted.

Abstract: A light guide plate has a substantially flat shape and used as a backlight for an electronic appliance. The light guide plate introduces thereinto illuminating light emitted from a light source through part of a side surface thereof and directs the illuminating light out of the light guide plate through light emitting parts formed in a main surface of the light guide plate, in which a light-receiving surface for the illuminating light on the side surface is inclined relative to a plane perpendicular to the main surface. Thus, illuminating light is refracted, enters the light guide plate, and propagates in the light guide plate while undergoing total internal reflection. Light can be effectively directed out of the light guide plate through the light emitting parts.

Abstract: A lighting device includes a housing, a plurality of LEDs arranged on a base of the housing, and a first optical plate positioned above the LEDs. The first optical plate includes a light input surface, a light output surface opposite to the light input surface, and a plurality of elongated arcuate protrusions formed on the light output surface. The elongated arcuate protrusions are substantially parallel to one another. The lighting device may be used as a backlight module.

Abstract: A liquid crystal panel module, a backlight module and a liquid crystal display (LCD) are provided. The liquid crystal panel module includes a liquid crystal panel and a diffraction grating layer. The liquid crystal panel has a plurality of pixels. The diffraction grating layer is disposed on the liquid crystal panel, and a maximum period of a grating of the diffraction grating layer is smaller than 1/10 of a size of the pixels. The backlight module includes a light guide plate, a light emitting element and a diffraction grating film. A light provided by the light emitting element emits from a light emitting surface of the light guide plate and is bended towards the light emitting element after passing through the diffraction grating film. The liquid crystal panel module and the backlight module can be applied to the LCD together or individually.

Abstract: A backlight unit 12 includes LEDs 16 and alight guide plate 18. The LEDs 16 includes a light emitting surface 16a. The light guide plate 18 includes a light entrance surface 34 disposed so as to face the light emitting surface 16a and through which light from the light emitting surface 16a enters and a light exit surface 34 through which the light exits. The light emitting surface 16a and the light entrance surface 34 are formed to be curved and an AR coating process is performed on the light entrance surface 34 as an optical process. An AR coating layer 47 is formed on the light entrance surface 34. Accordingly, improved brightness is achieved.

Abstract: A light-guiding structure with phosphor material layers includes a light-guiding unit, a light-emitting unit and a phosphor unit. The light-emitting unit is disposed beside an outer lateral side of the light-guiding unit. The phosphor unit is connected with the light-guiding unit and is disposed between the light-guiding unit and the light-emitting unit. In addition, the phosphor unit is formed or pasted on the lateral side of the light-guiding unit, and the light-emitting unit has a PCB substrate and a plurality of light-emitting elements electrically disposed on the PCB substrate and facing the light-guiding unit. Hence, light beams generated by the light-emitting elements of the light-emitting unit pass through the phosphor unit to form another light beams, and the light beams are guided into the light-guiding unit. Finally, the light beams are projected out from a light-exiting face of the light-guiding unit.

Abstract: There is provided a light emitting diode (LED) backlight device comprising a light guide plate and a light module composed of a plurality of LEDs. A haze structure is disposed between a light incident surface of the light guide plate and each LED. Haze value of the haze structure is varied with a high value at a position closing to an optical axis of the LEDs and a low value at a position further away from the optical axis of the LEDs.

Abstract: An optical touch apparatus includes at least one light source, at least one light guide unit, at least one optical detector, and a light reducing structure. The light source is disposed beside a display area of a display and capable of providing a light beam. The light guide unit is disposed beside the display area and in a transmission path of the light beam. The light guide unit has a first surface, a second surface, and a light incident surface. The light beam is capable of entering the light guide unit through the light incident surface and being transmitted to a sensing space in front of the display area through the first surface. The optical detector is disposed beside the display area. The light reducing structure covers a portion of the first surface adjacent to the light incident surface.

Abstract: An optical includes an optical body including a plurality of side faces where one of the plurality of side faces defines a light entrance face onto which a blue light is incident. A light exit face is connected to at least one of the side faces, and a yellow fluorescent layer is disposed on the light entrance face and is configured to convert the blue light into a white light.

Abstract: Optical assembly includes a light source adjacent a light input edge and generally parallel and planar first and second surfaces each comprising respective patterns of well defined optical elements that are quite small in relation to the length and width of the optical assembly. At least some of the optical elements of each pattern include a respective sloped surface for directing at least some light emitted from the light source. The respective slope angle of the sloped surface of at least some of the optical elements of one of the patterns is different from the respective slope angle of the sloped surface of at least some of the optical elements of the other pattern such that more of the light is emitted from one of the surfaces than is emitted from the other surface.

Abstract: An edge-light type backlight unit reduces the color unevenness on the display screen caused by the arrangement of point-shaped light sources (e.g., LEDs) in a point-shaped light source unit comprising a set of point-shaped light sources aligned. The backlight unit includes at least one point-shaped light source unit having point-shaped light sources arranged in a single direction in a predetermined order, the light sources emitting monochromatic light of different colors. The unit further comprises a first optical filter for limiting or controlling transmission of the monochromatic light emitted from one of the light sources disposed at one end of the light source unit, and a second optical filter for limiting or controlling transmission of the monochromatic light emitted from another of the light sources disposed at the other end thereof. The first and second filters are selectively formed on a first or second light guide plate or a diffusing plate.