Abstract: A set of optical sheets may perform at least one of diffusion, refraction, and condensation of light. The set of optical sheets may include a first optical sheet that includes a first base film and a first distinction unit disposed outside the first base film. The set of optical sheets may further include a second optical sheet that includes a second base film and a second distinction unit disposed outside the second base film. The second distinction unit may be spaced from the first distinction unit in a plan view of the set of optical sheets if the second base film complete overlaps the first base film.

Abstract: An optical member includes a first optical sheet, and a second optical sheet disposed on the light exit side of the first optical sheet. The optical sheets each include a body portion, and unit shaped elements arranged side by side on the body portion. The ratio of the height of the unit shaped elements relative to the arrangement pitch of the unit shaped elements in the first optical sheet is smaller than that in the second optical sheet.

Abstract: The present invention provides a backlight module, which includes a backplane, a reflector plate arranged inside the backplane, a light guide plate arranged on the reflector plate, an optic film assembly arranged above the light guide plate, a backlight source arranged inside the backplane and corresponding to the light guide plate, a mold frame mounted to the backplane, and a resilient block wall that is arranged above the backlight source and a light incidence end of the light guide plate and is fixed to the mold frame by means of force-fitting, bonding, or snap fitting. The resilient block wall has a bottom face and a side face perpendicular to the bottom face. The bottom face and the side face are set in tight engagement with an upper surface of the light guide plate and the backlight source.

Abstract: A light guide element and a method for manufacturing the same, and a lighting fixture are described. The light guide element includes a light guide body, a plurality of first and second microstructures corresponding to each other. The light guide body includes a first and a second light-emitting surface opposite to and parallel to each other. The first and second microstructures are respectively disposed on the first and second light-emitting surfaces by a first arrangement rule based on a first datum line and a second arrangement rule based on a second datum line. The first datum line is different from the second datum line. In a normal direction of the first light-emitting surface, each second microstructure laps over the corresponding first microstructure in part. When an incident light enters the light guide body, a first and a second mesh patterns are respectively formed on the first and second light-emitting surfaces.

Abstract: Electronic devices may include displays having backlight structures that include optical films. The optical films may help guide light from the backlight structures to display layers that generate display images using the light. The optical films may be attached together at one or more locations. The optical films may be attached to a structural member of the backlight structures. The structural member may be formed along each edge of the optical films and prevent the optical films from sliding within the display. Each optical film may be designed to expand to a common lateral size when the display is operated at a display operating temperature. The optical films may each include an elongated opening such as a slot through which a pin can be placed to partially constrain the movement of the optical films while allowing the optical films to expand or contract under changing thermal conditions in the display.

Abstract: The present invention provides a backlight module and display panel. The backlight module includes a light guiding plate, an optical film, and at least two positioning structure. The at least two positioning structure are placed on the opposite side surfaces of the light guiding plate. Each of the positioning structure includes a main positioning member and a sub positioning member fixedly connected to the main positioning member. The main positioning member is fixedly connected to the side surface of the light guiding plate. The sub positioning member extends for a fixing distance along the main positioning member. The opposite at least two sub positioning member fix the optical film on the emitting surface of the light guiding plate.

Abstract: A light modulator includes a light guide to guide light, a diffraction grating at a surface of the light guide, and a fluid having a refractive index substantially matched to a refractive index of the diffraction grating. The diffraction grating is to couple out a portion of guided light from the light guide using diffractive coupling. The index-matched fluid is to be selectively moved both into contact with the diffractive grating to defeat the diffractive coupling and out of contact with the diffraction grating to facilitate the diffractive coupling to modulate the coupled out guided light.

Abstract: Provided is a backlight unit that is capable of suppressing an uneven brightness. The backlight unit (2) includes a lower lens sheet (91) and an upper lens sheet (92) that are disposed in an inside area of a frame portion of a frame (4) and that are laminated in this order, and a rim tape (10) attached to the frame portion of the frame (4). The upper lens sheet (92) is fixed in position by a wide portion (10a) of the rim tape (10) being affixed to the upper surface of an end (92b) of the upper lens sheet (92), while the lower lens sheet (91) is held without being affixed to the wide portion (10a) of the rim tape (10).

Abstract: A backlight module includes a back bezel, a light guide plate, a plurality of optical films, and a clamping device. The light guide plate is disposed in an area enclosed by a periphery structure of the back bezel, and the optical films are disposed on the light guide plate. The clamping device includes a supporting element, a clamping piece, and a cushion element. The supporting element protrudes from the back bezel. The clamping piece is disposed on the supporting element and extends from the back bezel to the optical films. The cushion element is disposed between the clamping piece and the optical films.

Abstract: A lighting module includes a first side light source; a second side light source; a first light guide plate disposed between the first side light source and the second side light source; a second light guide plate disposed between the first side light source and the second side light source and disposed below the first light guide plate; a reflective plate between the first light guide plate and the second light guide plate; a first case coupled to one side of the first light guide plate, coupled to one side of the second light guide plate, and receiving the first side light source; and a second case coupled to the other side of the first light guide plate, coupled to the other side of the second light guide plate, and receiving the second side light source.

Abstract: The present invention provides a hollow backplane and a backlight module using the backplane. The backplane includes a main body and a heat sink mounted on the main body. The main body includes a bottom board and a side board connected to the bottom board. The bottom board forms a plurality of hollow sections. Reinforcement ribs are arranged in the hollow sections. The heat sink is mounted to the bottom board. The bottom board of hollow backplane is made of plastics and forms hollow sections so as to reduce the weight of the backplane. The reinforcement ribs help maintaining the strength of the backplane. With the strength being maintained, the backplane greatly reduces weight, lowers down cost, and is favorable for weight reduction of liquid crystal display device. Further, the backplane has a simple structure and is easy to manufacture, so as to further lower down the manufacture cost.

Abstract: The present invention provides a backlight module, which comprises a waveguide has an incident surface and light-emitting surface. A light source is arranged on a side of the incident surface. An optical module is arranged above the waveguide and facing the light-emitting surface. The optical module includes a least one optical film having a crease at one side thereof. At least a positioning arrangement is arranged on a side surface of the waveguide other than the incident surface. A space is defined between the positioning arrangement and the side surface of the waveguide. The crease of the optical film is received within the space. The present invention further provides a liquid crystal display module incorporated with a backlight module disclosed. Accordingly, when the optical films is experiencing an expansion or contraction resulted from temperature gradient, the robust can always make the optical films properly seated within the receiving space defined by the positioning arrangement and the waveguide.

Abstract: Discussed are a backlight unit and an LCD device using the same. The backlight unit according to an embodiment includes a light source; a light guide plate facing the light source; a plurality of protrusion patterns provided on the bottom of the light guide plate; an optical sheet disposed on the light guide plate; and a reflector disposed under the light guide plate, wherein each of the plurality of protrusion patterns has a cross-sectional structure comprising a first side that is a portion of the bottom of the light guide plate, a second side that extends from one end of the first side, and a third side that extends from the other end of the first side.

Abstract: An illuminator includes a light guide having a light source that is configured to emit light along a length of the light guide. The light guide further includes outcoupling zones affixed to a rear portion of the light guide, each zones affixed a predetermined distance from each other zone, which are configured to direct at least a portion of the emitted light. The light guide also includes a first diffuser that corresponds to a front portion of the light guide, and which operates to diffuse emitted light exiting the front portion of light guide. The illuminator further includes a secondary diffuser that is located a predetermined distance from the front portion of the light guide forming an air gap there between. The secondary diffuser is configured to further diffuse the at least a portion of the emitted light diffused by the first diffuser after passage through the air gap.

Abstract: A backlight unit and a liquid crystal display device include a shell assembly having a display window, a liquid crystal panel installed in the shell assembly, and a backlight unit providing a backlight source. The backlight unit includes a light-outgoing top surface just opposite to the liquid crystal panel, a light guide plate adjacent to the incident side of the light-outgoing top surface, an optical diaphragm, a reflecting plate arranged on the bottom of the light guide plate, and a light source. The substrate or cooling plate is bent at its side close to the light-outgoing top surface to form a first bent portion; the first bent portion has a first reflecting surface for reflecting the light, making most of the light emitted by the light source enter the light guide plate, thus greatly improving the utilization ratio and transmittance of the light of the light source.

Abstract: Optical films used for 3D autostereoscopic displays include lenses on one surface of the optical film that are registered to prisms on the opposing surface of the optical film. The lenses may be a-cylindrical lenses or cylindrical, and the rotation of the lenses can vary with position on the surface of the optical film. The prisms may be contiguous or non-contiguous. The prisms of the optical film can have a pitch that is different from a pitch of the lenses, or the prism pitch can be substantially the same as the pitch of the lenses.

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: A backlight module provided includes a light source, a first light-guided plate, and a second light-guided plate stacked on the first light-guided plate. The first light-guided plate includes a plate body and an extension disposed on an edge of the plate body and extending towards the second light-guided plate aside a lateral side of the second light-guided plate. The plate body and the extension form a seamless light incident surface. The extension has a reflection surface. The reflection surface connects the light incident surface or the surface of the plate body. The light source is disposed at a light incident surface of the first light-guided plate for projecting light into the light-guided plate.

Abstract: A lighting unit for a display device includes: a plurality of light sources which emits light; a wedge-shaped light guide having an incident surface disposed close to the light sources and an opposing surface disposed opposite the incident surface; and a lens sheet disposed on the light guide, where the lens sheet includes a plurality of lenses, each having an axis in a direction from the incident surface to the opposing surface, where the light guide is thinner at the incident surface than at the opposing surface, and a radius of curvature of each of the lenses is larger at the incident surface than the opposing surface.

Abstract: Extended area lighting devices include a light guide and diffractive surface features on a major surface of the light guide, at least some diffractive surface features adapted to couple guided-mode light out of the light guide. The diffractive features include first and second diffractive features disposed on respective first and second portions of the major surface. A patterned light transmissive layer, including a second light transmissive medium, optically contacts the second diffractive features but not the first diffractive features. A first light transmissive medium optically contacts the first but not the second diffractive features. The first and second portions may define indicia, and the first and second diffractive features provide low distortion for viewing objects through the light guide such that the indicia is not readily apparent to users when guided-mode light does not propagate within the light guide. Optical films having such diffractive features are also disclosed.

Abstract: A backlight unit includes a light source that emits light and a light guide plate disposed adjacent to the light source. The light guide plate includes an incident surface to which light is incident, an exit surface from which light incident through the incident surface exits, a reflection surface facing the exit surface to reflect the incident light, and a plurality of lenticular protrusions disposed on the exit surface. The reflection surface includes an inclined surface proximal to the incident surface and inclined with respect to the exit surface.

Abstract: An LED light guide includes a top surface and an opposite bottom surface, the bottom surface includes a number of concave lens portions, and the top surface includes a number of convex lens portions. The concave lens portions are each aligned with a convex lens portion, and each of the concave lens portions forms a receiving space for accommodating an LED. An LED module and a direct-type LED TV using the LED light guide are also provided.

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 planar light-emitting device includes a light source element and a light guide plate. The light source element is configured to emit light. The light guide plate has a housing hole, a light-emitting face and a light reflecting face. The housing hole houses the light source element. The light reflecting face is formed along a side end portion of the light guide plate. The light reflecting face has an inclined portion that is located next to the housing hole in a first direction of the light guide plate and a flat portion that is located next to the inclined portion in a second direction that is perpendicular to the first direction. The inclined portion has an inclination angle with respect to the flat portion such that the light reflected on the inclined portion is prevented from returning the housing hole.

Abstract: An illumination apparatus, comprising at least one light emitting source embedded in a waveguide material is disclosed. The waveguide material is capable of propagating light generated by light emitting source(s), such that at least a portion of the light is diffused within the waveguide material and exits through at least a portion of its surface.

Abstract: A backlight unit having improved luminance and reduced profile, and a liquid crystal display including the same are disclosed. In one embodiment, the backlight unit includes: i) a light source, ii) a light guiding plate including an incoming surface on which light generated from the light source is incident, an upper surface substantially perpendicularly extended with respect to the incoming surface, and a bottom surface arranged facing the upper surface and iii) an optical sheet formed on the light guiding plate. The upper surface of the light guiding plate includes a guiding surface, an incoming surface, and an emission surface sequentially arranged close to the incoming surface of the light guiding plate, and the optical sheet may be formed to cover the inclined surface and the guiding surface.

Abstract: An optical element that is capable of reventing an increase in size while increasing the light intensity of fluorescent light includes: a light-guide plate (21) that propagates light incident from a light source (1); a phosphor layer (22) that is provided on the light-guide plate (21) and that generates fluorescent light by means of light from the light-guide plate (21); a metal layer (23) that is layered on the phosphor layer (22); and a diffraction grating that is formed at the interface of the phosphor layer (22) and the metal layer (23).

Abstract: Disclosed are an optical member and a display device including the same. The optical member includes a wavelength conversion layer to convert a wavelength of an incident light; a first anti-reflective layer on a first surface of the wavelength conversion layer; and a second anti-reflective layer under a second surface of the wavelength conversion layer opposite to the first surface.

Abstract: A backlight assembly includes a light source unit configured to supply light, a light guide plate configured to guide light incident from the light source unit to an upper surface thereof, a reverse prism sheet disposed on the light guide plate and having a prism-shaped lower surface and an auxiliary film disposed between the light guide plate and the reverse prism sheet, in which the light guide plate includes a light-incident portion on which light is incident from the light source unit and a light-facing portion facing the light-incident portion.

Abstract: The present invention allows light leaked to outside of a light guide plate (50) from a surface area L to pass through a diffusion sheet (70) by covering both the bottom of an optical sheet (75) and the surface area L of the light guide plate (50) located between an LED FPC (25) and the optical sheet (75) with the diffusion sheet (70). This irradiates a liquid crystal display panel (30) with light after the light leaked to outside from the surface area L is diffused by the diffusion sheet (70), so unevenness in the brightness of backlight emitted from a backlight device (240) can be reduced. Thus, the brightness of images displayed on a screen can be made uniform regardless of distance to an LED (60).

Abstract: An improved modular illuminated frame member for framing translucent or transparent display articles. A transparent or translucent display article is framed using one or more modular illuminated frame members. The illuminated frame member contains two or more light emitting diode (LED) lighting modules, which direct light into the edge of alight guide assembly which illuminates the display article. The number of LED lighting modules in the frame member determines the frame member length; frame members with different numbers of LED lighting modules have different lengths. The frame member may be used as a heatsink for the LEDs. Dummy non-illuminated frame members are provided in matching lengths. The frame members may be encased in a further decorative frame. Using a set of modular illuminated frame members and dummy frame members of various lengths, frames for a wide range of display article sizes may be easily assembled.

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: Improved Light Re-directing Elements (ILRE) are provided in which a diffracting region is combined with a light scattering region to correct angular chromatic dispersion. Further embodiments include optical devices and systems using ILRE to reduce moiré, efficiently re-direct light, improve spatial and angular color and luminance uniformity, and reduce wavelength dispersion. In one embodiment, the light scattering region is a volumetric anisotropic light scattering region. Embodiments are included for use of ILRE in light emitting devices, displays and light fixtures.

Abstract: A stamp includes a metal supporting layer, a pattern forming layer and an adhesive layer. The metal supporting layer has a first thermal conductivity. The pattern forming layer is disposed on the metal supporting layer and has a surface with a molding pattern formed thereon. The adhesive layer is disposed between the metal supporting layer and the pattern forming layer to couple the pattern forming layer to the metal supporting layer, and has a second thermal conductivity lower than the first thermal conductivity. Thus, strength of the stamp may be improved, and deformation of the stamp during the process of manufacturing a light guide plate may be reduced or prevented.

Abstract: A light guide plate includes an incident surface on which light outputted from point light sources is incident and an outgoing surface for outputting light incident from the incident surface, wherein a reflection-and-propagation surface for reflecting light toward the outgoing surface is formed in a back surface opposite to the outgoing surface. The outgoing surface is made up of a propagation region adjacent to the incident surface, a diffusion-and-propagation auxiliary region adjacent to the propagation region, and a diffusion-and-propagation region adjacent to the diffusion-and-propagation auxiliary region. Hot spots and bright/dark lines in vicinities of the incident surface are controlled primarily by curved portions of prism upper ends formed in the diffusion-and-propagation region, and viewing-angle characteristics of the light guide plate are controlled primarily by linear portions of the prisms.

Abstract: The present invention provides a light guide plate having reduced hot spots comprising an input surface for receiving light from a plurality of discrete light sources, an output surface for emitting light, a bottom surface opposing to the output surface, and an end surface opposing to the input surface.

Abstract: A lightguide arrangement including a substantially thin, lightguide for transporting and coupling light. At least one light source is coupled to the lightguide. A plurality of micro-optic surface relief forms are arranged on the lightguide. The lightguide is configured to produce one or more active indicative and/or decorative illumination effects via interaction between the one or more light sources and the plurality of micro-optic surface relief forms. A keypad assembly including the lightguide and uses of lightguide constructions.

Abstract: The invention provides an illumination device comprising a waveguide having a first face, a second face, and a waveguide edge. The device further comprises a LED light source, wherein the LED light source is arranged to couple at least part of the light source light into the waveguide element. The device also comprises a first transmissive reflector, arranged at the first face side, and a second transmissive reflector, arranged at the second face side. The LED light source, the waveguide, the first transmissive reflector, and the second transmissive reflector, are arranged to generate the first and second light in a direction away from the first face and in a direction away from the second face, respectively. Such an illumination device may allow lighting of a room, for instance via the ceiling with uplight, and lighting of a specific area in the room with downlight.

Abstract: An electronic device may be provided with a display having backlight structures. The backlight structures may include a light source. Light from the light source may be coupled into an edge of a light guide plate. The backlight structures may include layers such as a diffuser layer and one or more layers of brightness enhancing film. The brightness enhancing film layers may be used to collimate light scattered from the light guide plate and thereby enhance backlight efficiency. Brightness enhancing films may be formed from transparent substrates such as layers of polyester. A patterned polymer layer such as a layer of patterned cured resin may be formed on the transparent substrate of a backlight enhancing film. A roller-based manufacturing process may be used to form the patterned polymer layer on the substrate. The patterned polymer layer may include a series of parallel ridges with rounded peaks.

Abstract: An LED light bar includes a PCB and a plurality of LED lamps mounted to and electrically connected with the PCB. Each of the LED lamps has a light emission face that is perpendicular to the PCB. The LED lamps at two opposite ends are arranged to have the light emission faces thereof angularly shifted in directions away from the light emission faces of the LED lamps in the middle to thereby increase light irradiation range of the LED light bar. With the LED lamps at two ends of the LED light bar being arranged to have light emission faces thereof angularly shifted so as to form a predetermined included angle between the light emission faces of the LED lamps and a light incidence face of the light guide plate, the irradiation range of light from the LED light bar is increased.

Abstract: The present invention provides a method of reducing hot spots in a light guide plate. The method comprises distributing a set of lenses in the core zone and a set of micro-lenses in the mixing zone between Y=Y0 and Y=Y1, wherein the density of the set of micro-lenses varies in the X-axis, having a maximum value at a first location that has a same X value as the center of one of the discrete light sources, and having a minimum value at a second location that has a same X value as the center of two adjacent discrete light sources, and a size and density of the micro-lenses is selected to redirect the light from the discrete light sources toward the Y-axis and provide a ratio L1/L0 that is between 0.9 and 1.1 for any Y?Y1.

Abstract: Disclosed is an imaging directional backlight that cooperates with a spatial light modulator to direct light into a first viewing window for one set of image pixels and into a second viewing window for a second set of image pixels. The waveguide may comprise a stepped structure, where the steps further comprise extraction features hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and hence defines the relative positions of system elements and ray paths. Such an apparatus may be used to achieve an autostereoscopic display with a flat structure, not requiring fast response speed spatial light modulators.

Abstract: A backlight module includes a back bezel, a light guide plate, a plurality of optical films, and a clamping device. The light guide plate is disposed in an area enclosed by a periphery structure of the back bezel, and the optical films are disposed on the light guide plate. The clamping device includes a supporting element, a clamping piece, and a cushion element. The supporting element protrudes from the back bezel. The clamping piece is disposed on the supporting element and extends from the back bezel to the optical films. The cushion element is disposed between the clamping piece and the optical films.

Abstract: An optical member includes; an incident surface on which light is incident, an exit surface which is disposed substantially opposite the incident surface and from which the light exits, a prism pattern disposed on the exit surface, and a diffusion pattern which is aligned with the prism pattern and is disposed in a total internal reflection region in which the light incident on the incident surface is totally internally reflected by the prism pattern and output through the incident surface.

Abstract: An optical component adapted for using in a backlight module providing light sources to a display apparatus is provided in the present disclosure. The optical component includes a first optical layer comprising a plurality of first blind holes extending downward from an upper surface to a first predetermined depth of the optical component, and a second optical layer comprising a plurality of second blind holes extending upward from a lower surface to a second predetermined depth of the optical component. A backlight module and a display apparatus are also provided.

Abstract: An apparatus to widen the light dispersion pattern of a light source shining through an overlay window from the viewing side of an electrical computer system. The overlay window is coupled to a panel of the system. The overlay window includes a transparent material, which has a first surface facing the light source and a second surface facing away from the light source to define a viewing side. An opaque material can be disposed on the first surface to partially cover the first surface to form a viewing window. A first diffusing mechanism is disposed on the first surface, and a second diffusing mechanism is disposed on the second surface. In response to the passage of the light output through the viewing window, the light dispersion pattern of the light output from the viewing side of the overlay window has a viewing angle of up to about 180 degrees.

Abstract: A light guide plate (2) in the planar illumination device (1) in one example of the present invention has: first connecting surfaces (21) that respectively connect adjacent light-output surfaces; and second connecting surfaces (11) that respectively connect adjacent opposite surfaces.

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: An electronic book device integrated with a magnetic pen rack, including a leather cover, a rack, a magnetic pen, a LED light source module, and an electronic book. The rack, of rectangular outline and having an opening at one side, is fixed on the leather cover so as to form a rectangular space for accommodating the electronic book. The rack includes: at least one bolt, used for fixing the electronic book; a first groove, used for accommodating the magnetic pen, the first groove having a first metal contact part for electrically connecting the magnetic pen with the electronic book; and a second groove, used for accommodating the LED light source module, the second groove having a second metal contact part for electrically connecting the LED light source module with the electronic book.

Abstract: This embodiment relates to a backlight module, comprising a first light guide plate and a second light guide plate, wherein a first lower structure layer and a second lower structure layer are disposed on the first light guide plate and the second light guide plate, respectively. The first lower structure layer includes a first primary strip and a first secondary strip, wherein the first primary strip is located between the first secondary strip and one side of the first light guide plate. The second lower structure layer includes a second primary strip and a second secondary strip, wherein the second primary strip is located between the second secondary strip and one side of the second light guide plate. The second primary strip is exposed outside the projection of the first lower structure layer on the second lower structure layer and the first lower structure layer at least partially overlaps the second secondary strip.