Abstract: A display device includes a display panel including a front substrate and a back substrate, a plurality of first brackets attached to a non-display area of a back surface of the back substrate using an adhesive, a frame disposed in the rear of the display panel, an optical layer disposed between the frame and the display panel, a light guide plate disposed between the frame and the optical layer, a light source disposed on the side of the light guide plate, a second bracket disposed on the plurality of first brackets, and a connection frame including a first portion inserted into a hole or a groove of each of the plurality of first brackets and a second portion connected to the second bracket.

Abstract: A back-light unit including a plurality of substrates, a plurality of light sources respectively disposed on the plurality of substrates and configured to emit light, and N (N?2) light guide panels respectively disposed adjacent to the plurality of light sources, a corresponding light guide panel including a light incidence part having a light incidence surface for receiving light emitted from a corresponding light source, and a light emission part for emitting the received incident light. Further, the corresponding light guide panel includes protruding surface patterns protruding from an upper surface the light emission part.

Abstract: Disclosed is an optical sheet for use in liquid crystal displays, which simultaneously functions to uniformly diffuse light emitted from a light guide plate and a diffusion plate and to increase brightness, decreases the loss of light, and enables the fabrication of thinner liquid crystal displays.

Abstract: A supporting member usable with a backlight unit of an image display apparatus includes a supporting portion that is formed of a transparent material, is disposed below the diffuser plate to support the diffuser plate, and has a first end being in contact with the diffuser plate; and a base that is formed at a second end of the supporting portion and fixes the supporting portion to an under chassis of the backlight unit.

Abstract: An anti-abrasion optical diffusion film (2), an LCD device and a light source using the anti-abrasion optical diffusion film (2) are disclosed, in order to solve the problem of the prior art that the diffusion particles are abraded or detached in large area, when an optical diffusion thin film receives external force. The anti-abrasion optical diffusion film (2) includes a substrate (21) and a diffusion coating (22); the diffusion coating (22) includes diffusion adhesive layer (24) and diffusion particles (23). The variation coefficient of the diameter of the particles is 10-100%. The invention improves the anti-abrasion ability of the optical diffusion thin film.

Abstract: A light source unit includes a substrate, a plurality of light emitting elements mounted on the substrate, a first inner wiring portion formed on the substrate and connected to the plurality of light emitting elements, and a second inner wiring portion formed on the substrate insulated from the first inner wiring portion. Two such light source units may be included in a backlight unit having a plurality of light emitting elements. A receiving member accommodates the first light source unit and the second light source unit, and a length of wires arranged along inside edges of the receiving member is reduced.

Abstract: A panel display module and a manufacture method thereof are disclosed. The panel display includes a backlight module, a display panel, a clear cover, and reinforced glue. The backlight module has a light source module and a frame that positions the light source module and other elements to provide structural protection. The display panel is disposed on the light exiting side of the light source module. The clear cover is disposed on one side of the display panel opposite to the light source module. The reinforced glue is distributed encircling the frame and adheres respectively to the frame and to the portion of the clear cover protruding over the display panel. The reinforced glue has a first side adhering onto the frame and a second side adhering onto the clear cover.

Abstract: An electrically conducting wire pattern constructed from nanometer or micrometer dimension wires. The electrically conducting wire pattern can be designed with various geometries, including rectangular, triangular and circular arrays, and combinations of such patterns. The electrically conducting wire pattern can provide improved optically transmissive electrical conductors and can provide improved polarizers for use with various electrical and optical devices and components.

Abstract: The present invention provides a backlight module and a lamp installation device thereof. The backlight module comprises a plurality of lamps therein, and two ends of each of the lamps are clamped, positioned and electrically connected to one of the lamp installation devices, respectively. Each of the lamp installation devices comprises: a mounting end, a lamp clamping portion and an elastic conductive plate. The mounting end is used to mount the lamp installation device on the backlight module; the lamp clamping portion has a pair of elastic clamping plates for engaging with one end of the lamp; and the elastic conductive plate is electrically connected to a terminal of the end of the lamp. The manufacture cost of the lamp installation device of the present invention is relatively low and the installation thereof is simple, while the lamp also can provide a better impact resistance.

Abstract: A light emitting component board group includes first and second light emitting component boards that are rectangular in shape. The first light emitting component board has first short and long sides, and includes a first input connector provided on one of the first short sides, a first light emitting component group, a first output connector provided on another one of the first short sides. The second light emitting component board has second short and long sides, is arranged in adjacent to the first light emitting component board, and includes a second output connector provided close to one of the second short sided that is close to the one of the first short sides, a second light emitting component group, a second input connector provided close to another one of the short sides that is close to the other one of the first short sides.

Abstract: A liquid crystal display and a driving method thereof capable of improving contrast properties by implementing a local dimming and achieving the slimness of the liquid crystal display. The liquid crystal display comprises a liquid crystal display panel, a backlight unit including a light guide plate part in which a plurality of light guide channels are formed, and a plurality of light sources for illuminating light to the light guide channels, a division driving controller for mapping an input picture to a plurality of blocks in which a plurality of data channels are intersected with the plurality of light guide channels, analyzing luminance of the input picture for each block, determining dimming values of the plurality of light sources, and independently modulating the luminance of the input picture for each block based on the analyzed result, and a light source driver for independently controlling luminance of the light sources responding to the dimming values.

Abstract: A backlight module includes an LGP and a linear light source. The LGP includes a light-incident side surface and a top light-emitting surface that has a peripheral region and an effective illumination region. The linear light source includes a circuit board, solid-state light-emitting devices configured on and electrically connected to the circuit board, and a reflector covering a portion of the peripheral region. Light emitted from each solid-state light-emitting device enters the LGP from the light-incident side surface. The reflector includes first reflection parts that correspond to the solid-state light-emitting devices and second reflection parts. Each second reflection part is connected to two adjacent first reflection parts. Each first reflection part and each second reflection part extend towards the effective illumination region from an edge of the top light-emitting surface. An extension length of each first reflection part is shorter than that of each second reflection part.

Abstract: A lighting device comprising: a light emitting module including a plurality of electrically connected light emitting bars each having a plurality of semiconductor light emitting devices; a chassis for containing the light emitting module and having a discharge opening; a reflection sheet arranged in the chassis; and a brightness nonuniformity reduction unit, wherein the light emitting bar includes: a band plate-shaped substrate; a wiring formed on one surface of the substrate; the plurality of semiconductor light emitting devices; and first and second connectors formed in proximity to opposing shorter sides on the one surface of the substrate, wherein the reflection sheet has at least a plurality of corresponding holes through which the plurality of semiconductor light emitting devices are inserted, and wherein the brightness nonuniformity reduction unit is arranged in proximity to a position of the first and second connectors of each light emitting bar.

Abstract: The present invention discloses a backlight module and a LCD using the same. Said backlight module comprises a light guide plate, a reflection sheet and a backplane, wherein said reflection sheet is arranged under the light guide plate; said backplane is arranged under the reflection sheet and partially supports the reflection sheet; and said reflection sheet is bent to form one or more supporting ribs for supporting the backplane to prevent the reflection sheet from drooping. The present invention solves the problem that the reflection sheet is affected by heat and then is easy to droop, by bending the reflection sheet of the backlight module to form the one or more supporting ribs for supporting the reflection sheet, and has the advantages of low cost and no negative influence on other components and system structure of the backlight module.

Abstract: An LCD apparatus comprising an LCD screen, backlight arrangements for providing back illumination to the LCD screen, video processing circuitry and air moving devices, characterized in that the air moving devices are arranged to move air to condition the image displaying surface of the LCD screen. An LCD image displaying apparatus according to the present invention could operate at a brightness level of above 1000 nits, and even 3000 nits, which provides an astounding visual effect in the outdoor environment.

Abstract: A backlight unit with uniform brightness (luminance) is disclosed. The backlight unit includes: a plurality of light sources arranged at a fixed interval; a diffusion plate disposed on the light sources to primarily diffuse light emitted from the light sources; and a diffusion sheet configured to secondarily diffuse the primarily diffused light from the diffusion plate, wherein the surface of the diffusion sheet is divided into first regions not opposite to the light and second regions opposite to the light sources, and the diffusion sheet includes lens pattern portions formed on the second regions.

Abstract: An electronic device may have a liquid crystal display with backlight structures. The backlight structures may produce backlight that passes through display layers in the display. The display layers may include color filter elements, a liquid crystal layer, and a thin-film transistor layer. The color filter elements may be interposed between the thin-film transistor layer and the backlight structures or the thin-film transistor layer may be interposed between the color filter elements and the backlight structures. The backlight structures may be formed from optical fiber, a two-dimensional array of light-emitting diodes, a light guide plate that includes a rectangular recess for receiving optical films, or light guide plate structures that include internal light scattering structures. A light guide plate may be provided with alignment features that mate with alignment features on optical films.

Abstract: A field-sequential display is operated in one of a color mode or a grayscale mode. In the color mode, a video source provides image content in the form of multiple-color image data having a frame rate of X Hz and a display controller uses the multiple-color image data to drive the field-sequential display so as provide multiple-color image content at the field-sequential display. In the grayscale mode, the display controller generates grayscale image data from the multiple-color image data and the display controller then drives the field-sequential display with the grayscale image data at a lower frame rate of Y Hz. While in the grayscale mode, the display controller can take advantage of the enhanced contrast provided by the grayscale image content to reduce or disable backlighting at the field-sequential display. The reduced timing requirements afforded by the lower frame rate, as well as the reduction or elimination of backlighting, can reduce power consumption compared to the color mode.

Abstract: There is provided a LCD module. The LCD module comprises a back plate, a light guiding plate provided on the back plate, an upper frame provided on the light guiding plate in contact with an edge of the light guiding plate, a liquid crystal display panel provided on the upper frame, and a silica gel pad disposed between the upper frame and the liquid crystal display panel. The surface of the silica gel pad that is in contact with the liquid crystal display panel is a curved surface.

Abstract: This lighting unit can control luminance in a plurality of block areas independently, and minimize luminance unevenness caused by discretely arrayed light sources, with a reduced number of parts. The lighting unit comprises: a light guide plate having a first and a second grooves formed therein; a first light source group accommodated in the first groove; and a second light source group accommodated in the second groove; the light guide plate having a first light mixing area, a first light emitting area and a second light mixing area; in the first light mixing area, the thickness of the light guide plate progressively increasing away from the first light source group; in the second light mixing area, the thickness of the light guide plate progressively increasing away from the second light source group; and in the first light emitting area, the light guide plate being flat-plate-like.

Abstract: A computer system, a display system, a method of graphic illumination is provided to give a user an improved appearance, functionality, and aesthetics. A display system may comprise a housing, a light source, and a plurality of micro perforations. The housing may have an interior surface and an exterior surface. The light source may be located within the housing. The plurality of micro perforations may be disposed to extend from the interior surface to the exterior surface of the housing. The plurality of micro perforations may pass through the housing at different angles with respect to a plane of the exterior surface of the housing.

Abstract: A lens includes an upper flat surface having a first outer diameter, a bottom surface having a second outer diameter and a third inner diameter, an external curved surface which connects the upper flat surface and the bottom surface, and an inner curved surface which protrudes toward the upper flat surface from the bottom surface at the third inner diameter.

Abstract: An apparatus controls a backlight of a display panel of a camera system. The apparatus includes a sub-pixel extracting unit, an ambient light luminance calculating unit, and a backlight controller. The sub-pixel extracting unit extracts sub-pixel luminance values from image data, where the image data is indicative of a current image frame defined by a plurality of pixels, and where each of the pixels includes a plurality of sub-pixels. The ambient light luminance calculating unit calculates an ambient light luminance value of the current image frame from the sub-pixel luminance values extracted by the sub-pixel extracting unit. The backlight controller which generates a backlight control signal based on a comparison between the calculated ambient light luminance value of the current image frame and an ambient light luminance value of a previous image frame.

Abstract: A linear white light source 1 includes a base, a plurality of light emitting diode chips linearly disposed on the base and each generating ultraviolet light having a wavelength of not less than 330 nm nor more than 410 nm, and a phosphor layer continuously formed on the base to cover the plurality of light emitting diode chips and containing a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor.

Abstract: The present invention provides a slim bezel backlight module of liquid crystal display device, which includes: a bezel, a back panel, a connection member, and a plastic frame arranged on the back panel. The bezel includes a front plate that forms a displaying opening and a side plate extending downward from one end of the front plate. The back panel includes a bottom board that is opposite to the front plate. The front plate of the bezel forms a first through hole. The plastic frame forms a through hole corresponding to the first through hole. The bottom board of the back panel forms a second through hole corresponding to the first through hole. The connection device includes a connection member and a locking member mating the connection member. The connection member includes a base section and an extension section extending downward from the base section.

Abstract: The present invention provides a slim bezel backlight module of liquid crystal display device, which includes: a bezel, a back panel, a connection member, and a plastic frame arranged on the back panel. The bezel includes a front plate that forms a displaying opening and a side plate extending downward from an end of the front plate. The back panel includes a bottom board that is opposite to the front plate. The front plate of the bezel is recessed to form a first extruded threaded hole having internal threading. The bottom board of the back panel forms a bore corresponding to the first extruded threaded hole. The plastic frame forms a through hole corresponding to the bore. The connection member extends through the through hole and has two ends respectively mating and connecting the first extruded threaded hole of the front plate of the bezel and the bore of the bottom board of the back panel to thereby fix the bezel to the back panel.

Abstract: The present invention discloses a direct type backlight module and a Liquid Crystal Display (LCD) device. A direct type backlight module comprises a diffuser plate located on the light emergent surface and a backplane opposite to the diffuser plate; a support pin is arranged between the backplane and the diffuser plate, and the support pin is rigidly fixed to the backplane. Because the support pin of the present invention is rigidly fixed on the backplane, there is no direct relationship between the present invention and the thicknesses of the backplane and the LED light plate fixed on the backplane, and no noise is produced by the loosed “mushroom head” due to infirm gripping; therefore, the support pin can be firmly fixed. The support pin can be rigidly fixed by modes facilitating the automatic operation like SMT welding and riveting, which is advantageous for promoting the productivity and the conformance rate.

Abstract: Described herein are light sensors that primarily respond to visible light while suppressing infrared light. Also described herein are systems the incorporate such light sensors. Such a system can include a display, a light source to backlight the display and a controller to control the brightness of the light source based on feedback received from such light sensors. Described herein are also methods for controlling backlighting.

Abstract: A lamp clip 20 holds at least one of a plurality of cold cathode tubes 18 that are arranged parallel to each other. The lamp clip 20 includes a pair of arms 30, 31 configured so as to extend along a parallel arrangement direction of the cold cathode tubes 18. The parallel arrangement direction extends from one cold cathode tube 18 to another. The arms 30, 31 have distal ends separated from each other to from an opening 33. The opening 33 allows insertion and removal of the cold cathode tube 18 therethrough, and the arms 30, 31 hold the cold cathode tube 18 therebetween. A plurality of light source receiving surfaces 32 that receive the cold cathode tube 18 are provided so as to be along the parallel arrangement direction on at least one of surfaces of the arms 30, 31 facing the cold cathode tube 18.

Abstract: Disclosed is a liquid crystal display device to realize soft touch and sense touch regardless of illumination of external light or reflected light. The liquid crystal display device includes a liquid crystal panel including a first substrate and a second substrate facing each other, wherein a liquid crystal layer is interposed between the first substrate and the second substrate, an infrared sensor arranged on the first substrate, an infrared filter arranged corresponding to the infrared sensor arranged on the second substrate facing the first substrate, a first polarizing plate adhered to the back surface of the first substrate, a second polarizing plate adhered to the back surface of the second substrate, a light guiding plate arranged under the first polarizing plate, a first light source arranged on one side of the light guiding plate to emit white light, and a second light source arranged on the other side of the light guiding plate to emit infrared light to the light guiding plate.

Abstract: A gate-on voltage/LED driving voltage generator includes an inductor boosting an input voltage through a PWM voltage and the input voltage, a diode and capacitor rectifying the boosted voltage, a first output terminal outputting the rectified voltage to supply an LED driving voltage to an LED, and a second output terminal supplying the rectified voltage to a gate driving circuit. Further, an aging test apparatus of an LCD device, which includes a high LED driving voltage generator in an HVS power board, and an HVI power board, may selectively perform an aging test according to a backlight unit of the LCD. Further, a DC-DC converter having the gate-on voltage/LED driving voltage generator, and the LCD including the DC-DC converter are provided.

Abstract: The present invention discloses a locking piece, a backlight module, and an LCD device. A locking piece for fixing PCB on backplane, the fixed top of the locking piece and the PCB is provided with a clamping structure; and the root of the locking piece is provided with a fixed structure for fixing the locking piece on the backplane. Because the present invention uses independent locking pieces, the locking pieces can be selectively fixed and arranged in the positions for fixing the PCB on the backplane. Thus, the standardization and generalization design is achieved, and the cost is reduced; in addition, because a clamping structure is used between the locking piece and the PCB, compared with the modes of screw fixation, riveting fixation and the like, the clamping mode has high installation efficiency and is beneficial to productivity enhancement and further cost reduction.

Abstract: The present invention provides a back frame, which includes at least first and second primary assembling pieces. The at least two primary assembling pieces are joined to form the back frame. The primary assembling pieces have a vertical section, and the vertical section realizes mating between the back frame and an intermediate frame and a front frame of the flat panel display device. The present invention provides a back frame, a backlight system, and a flat liquid crystal display device that use a fastener extending through a mating hole of a vertical section of the primary assembling piece and a through hole of an intermediate frame and a through hole of a front frame of the flat liquid crystal display device to fix the back frame and the front frame and the intermediate frame of the flat liquid crystal display device together, making the entire frame structure of the flat liquid crystal display device more stable.

Abstract: The present invention provides a back frame of flat panel display device, which includes at least first and second primary assembling pieces. The at least two primary assembling pieces are joined to form the back frame. The primary assembling pieces have positioning sections, and the positioning section cooperate with a back panel of the flat panel display device to position the back frame. The present invention also provides a backlight system and a flat liquid crystal display device. The present invention uses positioning sections formed on the primary assembling pieces to cooperate with a back panel of the flat panel display device to fix the back frame to the back panel so as to facilitate removal of the back frame and further secure the whole structure of the flat liquid crystal display device.

Abstract: The present invention discloses a backlight module, a backplane and an LCD device. The backlight module comprises a backplane, a PCB and locking pieces for fixing the PCB on the backplane; the backplane comprises a frame formed by multiple brackets, and bridges arranged on the brackets. The brackets or the bridges are provided with multiple through holes, and the locking pieces are selectively arranged in the through holes by a fixed structure arranged at the bottom of each locking piece. Because the backplane comprises a frame formed by multiple brackets, the frame is provided with bridges for arranging PCBs and the like, and both the brackets and bridges are formed by combining universal shaped parts. The present invention has the advantage of material saving; the bridges are provided with through holes for arranging hillocks, and the hillocks are arranged in any through hole of the bridges.

Abstract: The present invention discloses a backplane, a backlight module and an LCD device. A backplane, comprising a plurality of ribs which intersect vertically and horizontally to form a plurality of meshes. In the present invention, because ribs are adopted as basic members of the backplane and the comprehensively intersected ribs form the meshes, all components and parts of the backplane module required to be fixed to the backplane can be fixed to the meshes. The ribs are standard and universal; the meshes formed by the ribs are arranged on the whole backplane and can absolutely satisfy the fixation needs of the components and the parts of different positions and different installation dimensions; therefore, for backplanes of different dimensions, as long as the ribs of different lengths are selected, a standard and universal backplane, a backlight module and an LCD device can be formed.

Abstract: The present invention provides a back frame of flat panel display device, which includes at least first and second primary assembling pieces. The at least two primary assembling pieces are joined to form the back frame. The primary assembling pieces have a snap-on engagement section, and the snap-on engagement section mates a front frame of the flat panel display device. The present invention provides a back frame of front panel display device, a backlight system, and a flat liquid crystal display device that form a snap-on engagement section on a primary assembling piece to mate a snap-on engagement of a front frame of the flat panel display device to fix the front frame of the flat panel display device and also to allow of easy disassembling of the flat panel display device.

Abstract: The display device including: a display panel; a backlight; a memory for converting frame rate of an input video signal and outputting a video signal; an interpolation frame generation unit for generating an interpolation frame based on the video signal output from the memory; a histogram generator for generating a histogram based on the input video signal; and a backlight brightness calculation unit for calculating a backlight control signal, the display device further comprising: wherein image data for display, which is obtained by an N-th frame of the input video signal, and image data of the interpolation frame generated based on the N-th frame and an (N+1)-th frame of the input video signal, is input to the display panel; and wherein the backlight control signal calculated based on the histogram generated based on the image data of the N-th frame is used for displaying the image data for display.

Abstract: An illuminating device includes a hot-cathode fluorescent tube (discharge tube) and a light emitting surface that emits light from the hot-cathode fluorescent tube. An auxiliary light emitting portion is provided in the vicinity of a non-lighting region of the hot-cathode fluorescent tube. The auxiliary light emitting portion includes an optical fiber having an incident portion for receiving light from the hot-cathode fluorescent tube, and a light guide plate that receives light from the optical fiber and emits the incident light toward the light emitting surface.

Abstract: A lighting unit 12 of the present invention includes a light source 17, a chassis that covers the light source 17 and a vibration absorber 70 provided in a mat-like form and arranged between the light source 17 and the chassis 14. The vibration absorber 70 is made of gelatinous material. With this configuration, the vibration absorber 70 blocks vibration propagation from the light source 17 to the chassis 14. As a result, a roaring sound is properly eliminated or reduced.

Abstract: Improved apparatus and method for collecting and directing light from a source via a light guide and modulated display assembly in an efficient manner through the design and use of prismatic optical structures, diffusers and/or light redirectors.

Abstract: A backlight assembly includes; a light source including a light emitting surface through which a light exits and an optical member including a first surface disposed adjacent to the light source and a second surface disposed substantially opposite to the first surface, wherein the optical member covers the light source and guides the light therethrough, wherein the optical member includes; an incident surface to which the light is incident, the incident surface being connected with the first surface corresponding to the light source, an optical pattern disposed on the second surface and corresponding to the light source, the optical pattern reflecting a first light of the light incident through the incident surface through total internal reflection and a light guide pattern disposed on the first surface, wherein the light guide pattern directs the reflected first light to an exterior of the optical member.

Abstract: In the present invention, a diffusing sheet for diffusing light outputted from a light guide plate is extended to a stepped upper surface of an LED substrate and disposed at a lateral surface of the light guide plate so that the diffusing sheet can completely cover the light guide plate, thereby preventing undiffused light from being supplied to an liquid crystal display device.

Abstract: An electronic apparatus such as a notebook PC or mobile telephone is provided with a badge comprising a multi-layer panel and a light source mounted within the body to illuminate the badge panel from behind. A control circuit senses the orientation of the part of the casing body controls the light source so as to activate it when body part is in a predetermined range of orientations. The multi-layer panel is designed to present a logo in a first orientation (relative to said body part) when illuminated by ambient light and in a second orientation when illuminated from behind by light source. By this means, the orientation of the graphic elements as viewed by an observer can be correct more of the time than by a conventional badge.

Abstract: A backlight unit including holding members capable of preventing occurrence of a noise caused when the members are brought into contact with an optical member such as a diffusion plate. A backlight unit (4) includes a chassis (14) including a surface (14a) housing light sources (12), an optical member (11) having a flat plate shape and disposed above the light sources, and members (25) holding the optical member and attached to the housing surface, wherein each of the holding members includes a portion (25a) holding the optical member, and paired leg portions (25b and 25c) extending from the holding portion, elastically deformable in a direction in which the leg portions approach/leave each other and including paired foot portions (25d) disposed at lower ends of the leg portions, at least one of the paired foot portions being placed in a manner slidable on the housing surface in the approaching/leaving direction.

Abstract: A backlight assembly including direct-type lamps and an edge-type lamp and a liquid crystal display having the backlight assembly. The direct-type lamps are arranged with a predetermined interval to emit light, and the edge-type lamp is provided at a side portion of a light guide plate provided above or below the direct-type lamps. The light guide plate and a light guide pattern output light, which is emitted from the edge-type lamp, through a space between two adjacent direct-type lamps. The backlight assembly supplies light to the light receiving region such that brightness is uniformly distributed throughout the light receiving region regardless of the position of the direct-type lamps.

Abstract: In a lamp clip 30, a locking portion 32 locked from the rear side to the hole edge of a locking hole 41 formed in a chassis 22 through an insertion hole 43 formed in an optical sheet 27 is provided. In the chassis 22, a through-hole 42 having a hole area larger than that of the locking hole 41 is provided continuously from the locking hole 41. The locking portion 32 is allowed to move between a fixed position where the locking portion 32 is located in the locking hole 41 and an attaching and detaching position where the locking portion 32 is located in the through-hole 42. The insertion hole 43 of the optical sheet 27 has a hole area larger than that of the locking hole 41. The optical sheet 27 is allowed to slide from an initial position where the insertion hole 43 communicates with the through-hole 42 in a direction along a moving direction of the locking portion 32.

Abstract: Light guide devices comprising an intermediate layer of low refractive index between higher refractive index elements are described. The light guide devices are suitable for use in backlights.

Abstract: In order to accurately illuminate an object to be illuminated with planar light having little unevenness in intensity, a backlight unit (2) having a simple structure and simple assembly is provided with a reflection sheet (8) which covers a chassis (5) and a substrate (6) and which has through-holes (81) penetrated by light sources (7), wherein the through-holes (811) formed in the center become larger than the through-holes (814) formed at the edges.

Abstract: Provided is a liquid crystal display device that has excellent visibility while using a protective film comprising a polyester film. The liquid crystal display device comprises a backlight light source, and a liquid crystal cell disposed between two polarizers; the backlight light source being a white light-emitting diode; each of the polarizers comprising a polarizing film and protective films laminated on both sides of the polarizing film; and at least one of the protective films being a polyester film having a retardation of 3,000 to 30,000 nm.