Abstract: A lens interchangeable digital camera includes an image sensor in which a subject image is formed on an imaging surface through an imaging optical system including a zoom lens and a sensor movement type shake correction mechanism that performs a sensor movement operation of moving the image sensor in a direction to cancel a shake. A zoom operation determination unit determines whether or not a zoom operation in which the zoom lens moves is being performed. In a case where the zoom operation determination unit determines that the zoom operation is being performed, an operation deciding unit prohibits a shift operation which is at least a part of a sensor movement operation which is allowed while the zoom operation is stopped.

Abstract: A stereoscopic image display device includes a display panel that includes pixels, a polarization controller that generates a first output voltage and a second output voltage, and a polarization control layer that controls a path of light emitted by the display panel, based on the first output voltage and the second output voltage. The first output voltage has a first voltage level in a first mode, and a second voltage level that differs from the first voltage level in a second mode. The second output voltage has the first voltage level in the first mode, and has the first voltage level or a third voltage level that differs from the first and second voltage levels in the second mode.

Abstract: An autostereoscopic three-dimensional display system for surgical robotics has an autostereoscopic three-dimensional display configured to receive and display video from a surgical robotics camera, and a first sensor assembly and a second sensor assembly. A processor is configured to detect and track an eye position or a head position of a user relative to the display based on processing output data of the first sensor assembly, and to detect and track a gaze of the user based on processing output data of the second sensor assembly. The processor further is configured to modify or control an operation of the display system based on the detected gaze of the user. A spatial relationship of the display also can be automatically adjusted in relation to the user based on the detected eye or head position of the user to optimize the user's visualization of three-dimensional images on the display.

Abstract: The present disclosure provides a display panel and a display apparatus. The display panel includes sub-pixel islands, the sub-pixel island includes a first small pixel island and a second small pixel island arranged along a first direction, and each of the small pixel islands includes at least two small pixel groups. The display panel further includes a first cylindrical lens and a second cylindrical lens arranged along the first direction. A distance between two small pixel groups in the first small pixel island is smaller than a distance between two small pixel groups in the second small pixel island, a radius of curvature of the first cylindrical lens is smaller than a radius of curvature of the second cylindrical lens, the first cylindrical lens and the second cylindrical lens are located at centers of the first small pixel island and the second small pixel island along the first direction respectively.

Abstract: A floating display device which includes a display light source, an optical imaging sheet and a micro-lens array sheet is provided. The micro-lens array sheet has a plurality of micro-lenses arranged in an array. The optical imaging sheet has a plurality of sub-imaging units arranged in an array corresponding to the micro-lenses. The sub-imaging unit includes a plurality of first sub-imaging units and a plurality of second sub-imaging units. Each of the first sub-imaging units has a first main imaging pattern, and each of the second sub-imaging unit has a second main imaging pattern. The first main imaging pattern and the second main imaging pattern have the same pattern. Wherein, the second sub-imaging units are arranged to form an auxiliary imaging pattern. At least a number of the second sub-imaging units respectively include a base imaging pattern, and the base imaging pattern is located around the second main imaging pattern.

Abstract: Systems and methods for generating real images via retroreflection are provided. An image source may project light beams, which are received at a beam splitter. The beam splitter, positioned between a retroreflector and a viewing area, may reflect the light beams toward the retroreflector. In turn, the light beams may be reflected back from the retroreflector and toward and through the beam splitter to generate a real image that appears to a viewer to be floating in the viewing area. A controller may control the image source to adjust the real image based on a control parameter detected by at least one sensor.

Abstract: A WS12-releasing contact lens is described as well as method of manufacturing the same. The WS12-releasing contact lens comprises a polymeric lens body and WS12 releasably adhered to the polymeric lens body, and releases from 0.05 ?g to 0.5 ?g WS12 after 1 hour in a release media or when worn by a human subject. The WS12-releasing contact lens can be comfortably worn by a symptomatic contact lens wearer and can increase the duration of comfortable lens wearing time and/or reduce lens awareness events and/or reduce contact lens dryness in a symptomatic contact lens wearer.

Abstract: Eyewear is provided including a frame, and a camera connected with the frame, in which the camera is configured to be controlled by a remote controller. The camera may be configured to capture video and/or a photo. The eyewear may include data storage, and the camera may be connected to the data storage. A wrist watch may be configured to act both as a time piece and a controller of the camera. The eyewear may also include a heads up display and/or a video file player. The eyewear may also include an electro-active lens.

Abstract: An eye mask for practicing winter sports is provided. The eye mask has a lens assembly having a frame, a structural lens, a Guest-Host-type liquid crystal (LC) film adapted to modify a transparency level thereof and laminated to the structural lens, and a photovoltaic cell for supplying the LC film. The structural lens is applied to the frame. The frame has a higher stiffness than the structural lens.

Abstract: The invention relates to an ophthalmic article (1), in particular for sunglasses, comprising at least one substrate (9) and a photochromic filter compound (15), the ophthalmic article (1) having a first transmission spectrum in an activated state of the photochromic filter compound (15) and a second transmission spectrum in a deactivated state of the photochromic filter compound, such that: ?—the first and the second transmission spectra at wavelengths lower than 380 nm is lower than 1%, ?—the first and the second transmission spectra have a relative first maximum between 460 nm and 510 nm, ?—the first and the second transmission spectrum have a relative first minimum between 560 nm and 610 nm, and where ?—Tvactivated is the luminous transmittance according to ISO_13666 in the activated state of the photochromic filter compound. ?—Tvdeactivated is the luminous transmittance according to ISO_13666 in the deactivated state of the photochromic filter compound.

Abstract: The invention discloses a special lens for sports scenes. The lens body has a blue-green absorption layer, an auxiliary absorption layer and a green-red absorption layer. The blue-green absorption layer, the auxiliary absorption layer and the green-red absorption layer are pasted together by glue or fixed together by hot-melt pressing process. The blue-green absorption layer is injection-molded by adding 1.2 g of blue light absorber and 1.04 g of phthalocyanine dye per 100 g of substrate material. The auxiliary absorption layer is injection-molded by adding 2.4 g of phthalocyanine dye and 2.4 g of azo nickel metal compound per 100 g of the substrate material. The green-red absorption layer is injection-molded by adding 1.04 g of azo nickel metal compound and 1.2 g of blue light absorber per 100 g of the substrate material. The invention makes the blue and green colors of the object more vivid and improves the contrast and clarity of the color of the object.

Abstract: A method, system and/or spectacle eyewear device for modifying the color vision of a person while viewing a color image emitted in linearly polarized light by a display device includes a first lens and a second lens, wherein the lenses each include a color-selective partial polarization filter and the polarization axes the filters are orientated non-parallel to each other and are configured so that a person experiences binocular rivalry due to spectral binocular disparity with respect to the polarized light emitted by the display device. In some variations the polarization axes of the filters are oriented in such a way that the intensity of binocular rivalry is maintained for rotations of the polarized light and/or display device by 45 degrees and by 90 degrees. In some variations the lenses appear substantially identical when viewed in non-polarized light. In some variations the person has color blindness or color vision deficiency.

Abstract: A head-mounted device includes a frame and a sensor coupled to the frame. The sensor includes a first conductive plate coupled to the frame and a first contact pad coupled to the frame and electrically coupled to the first conductive plate. The first contact pad includes an electrically conductive material embedded in a non-electrically conductive material, and the first contact pad is resiliently flexible and is configured for facial engagement. The sensor is configured to generate a signal that indicates a change in a capacitance of the sensor, and a controller is configured to change a power state of the head-mounted device based on the signal.

Abstract: Techniques for providing eyewear or other head-worn personal electronic apparatus with electrical components are disclosed. The electrical components can provide electrical technology to eyewear or other head-worn personal electronic apparatus without having to substantially compromise aesthetic design principles. The electrical components can be partially or completely internal to eyewear or other head-worn personal electronic apparatus. The electrical components can operate independently or together with other electrical components provided elsewhere. Apparatus for presenting after-market electrical components are also disclosed.

Abstract: The present disclosure provides a polarizer structure, including a first polarizer, a first electrode, and a second electrode, the first electrode and the second electrode are respectively attached to two opposite surfaces of the first polarizer, and the first electrode and the second electrode are configured to enable or disable a polarization function of the first polarizer according to applied voltage. The present disclosure further provides a terminal device and a method for controlling amount of incoming light of a terminal device.

Abstract: A transfer apparatus includes a transfer layer formed of a thermally switchable material that undergoes a phase change when heated. A first side of the transfer layer is placed in contact with a chiplet during a transfer operation. An optical absorber material is thermally coupled the transfer layer. An optical energy source is operable to apply optical energy to the optical absorber material to selectively heat a region of the transfer layer that corresponds to a location of the chiplet. The region holds the chiplet when the optical energy is removed during the transfer operation. The region is subsequently heated during the transfer operation to release the chiplet. The transfer layer can be reused for repeated transfer operations.

Abstract: A transfer system includes a transfer layer formed of a thermally switchable material that undergoes a phase change when heated. A side of the transfer layer is placed in contact with an outward-facing side of a chiplet during a transfer operation. An optical absorber material is located on at least one of the outward facing side of the chiplet or an inward facing side of the chiplet. An optical energy source is operable to apply optical energy to the optical absorber material through the transfer layer to selectively heat a region of the transfer layer that corresponds to a location of the chiplet. The region holds the chiplet when the optical energy is removed during the transfer operation. The region is subsequently heated during the transfer operation to release the chiplet.

Abstract: Examples described herein relate to an optical device that entails phase shifting an optical signal. The optical device includes an optical waveguide having a first semiconductor material region and a second semiconductor material region formed adjacent to each other and defining a junction therebetween. Further, the optical device includes an insulating layer formed on top of the optical waveguide. Moreover, the optical device includes a III-V semiconductor layer formed on top of the insulating layer causing an optical mode of an optical signal passing through the optical waveguide to overlap with the first semiconductor material region, the second semiconductor material region, the insulating layer, and the III-V semiconductor layer thereby resulting in a phase shift in the optical signal passing through the optical waveguide.

Abstract: A display panel and a display device are provided. The display panel includes a dimming liquid crystal cell and a display liquid crystal cell. The dimming liquid crystal cell includes a first substrate, a second substrate, a dimming liquid crystal layer, a first electrode layer, and a second electrode layer. A first resistance reduction metal layer is disposed on the first substrate, and the first resistance reduction metal layer is electrically connected to the first electrode layer.

Abstract: A display device includes: a liquid crystal display panel provided with pixels; a light source provided with light emission points and configured to emit light; an acquirer configured to acquire viewpoint information of a user; and a controller configured to control image display based on the viewpoint information. The viewpoint information includes information related to the positions of viewpoints and information indicating an arrangement direction of the viewpoints. The controller performs display drive of at least some or all of pixels positioned on straight lines connecting the light emission points to the viewpoints based on a relative rotation angle between the liquid crystal display panel and the arrangement direction and a relative positional relation between the viewpoints and the light emission points. The ratio of the pitch of the pixels to the pitch of the light emission points is 1:4n or 1:6n. n is a natural number.

Abstract: An electronic device, including a display module, a viewing angle switchable panel, a switching element, and a driving element, is provided. The display module has multiple first units and multiple second units. The first units have a first color, and the second units have a second color. The first color and the second color are different. The switching element is used to switch the viewing angle switchable panel between a first viewing angle mode and a second viewing angle mode. The driving element is used to provide a first data voltage to at least one of the first units of the display module in the first viewing angle mode, and provide a second data voltage to the at least one of the first units in the second viewing angle mode. The first data voltage and the second data voltage are different.

Abstract: A curved display panel and a curved display device are disclosed in the present application. The curved display panel includes a plurality of sub-pixels. The curved display panel has a central line and a central display area, and the central display area is symmetrical with respect to the central line. Aperture ratios of the sub-pixels located in the central display area gradually increase along a direction from a position away from the central line to the central line, and a difference between the aperture ratios of adjacent two of the sub-pixels is less than or equal to 2%. The split-screen probability of the curved display panel is reduced in the present application.

Abstract: An electronic structure includes a substrate, a plurality of electronic units disposed on the substrate, and a circuit structure electrically connected with at least one of the plurality of electronic units. The substrate has a first flat part and a curved part connected with the first flat part. Two adjacent ones of the plurality of electronic units on the first flat part have a first pitch in a first direction parallel to a surface of the first flat part Another two adjacent ones of the plurality of electronic units on the curved part have a second pitch different from the first pitch in a second direction parallel to a surface of the curved part. In a normal direction of the first flat part, at least a portion of the circuit structure overlaps a region between another two of the plurality of electronic units on the first flat part.

Abstract: A display module and a display device are disclosed. The display module includes a display panel and a back panel. The back panel includes a first sub-panel disposed on a backside of the display panel, and the first sub-panel includes a plurality of first regions spaced apart and a second region adjacent to the first regions, wherein a thickness of the first sub-panel in the first regions is greater than 0 and less than a thickness of the first sub-panel in the second region.

Abstract: A dual side view display includes a waveguide with an inside transparent layer and an outside transparent layer spaced apart from and parallel to the inside transparent layer, and a plurality of inside view liquid crystal (LC) pixels and a plurality of outside view LC pixels disposed within the waveguide. The plurality of outside view LC pixels are disposed within the waveguide parallel to and in-plane with the plurality of inside view LC pixels. The plurality of inside LC pixels includes a plurality of outside blocking layers configured to block light scattered in the plurality of inside view LC pixels from propagating through the outside transparent layer. Also, the plurality of outside view LC pixels includes a plurality of inside blocking layers configured to block light scattered in the plurality of outside view LC pixels from propagating through the inside transparent layer.

Abstract: The present application discloses a display device and electronic device. The display device is configured by sequentially configuring the corresponding first bias current, second bias current, and third bias in a start period, a sustain period, and an end period. The current value of the first bias current is greater than the current value of the second bias current, and/or the current value of the third bias current is greater than the current value of the second bias current, which improves the display quality and reduces display power consumption.

Abstract: A display module and a seamless splicing display device are disclosed. The display module includes: a display panel including a central display area and a bezel area adjacent to the central display area, wherein the display panel is provided with a bezel driving circuit and an array substrate driving circuit; a compensation display component disposed on the display panel, located in the bezel area, and electrically connected with the bezel driving circuit; and a metal wiring located on a lateral surface of the display panel and connected with the bezel driving circuit and the array substrate driving circuit.

Abstract: A manufacturing method of a display device, the display device, and a spliced display device are disclosed. The display device includes a liquid crystal display panel (LCD display panel), a plurality of pad units, a plurality of conductive units, and a plurality of mini light-emitting diodes (mini-LEDs). The mini-LEDs are manufactured in a bezel area of the LCD display panel to allow the bezel area of the LCD display panel which does not emit light and display originally to display by the mini-LEDs, thereby improving a screen ratio of the display device and improving product competitiveness of the spliced display device.

Abstract: A spliced panel is disclosed. At least two display panels are spliced to each other. Each of the at least two display panels includes a bending part and a non-bending part. The bending part is bent from a side of the non-bending part to a back surface of the at least two display panels. The non-bending part is configured to display an image. In the at least two display panels spliced to each other, the bending part of one of the at least two display panels is correspondingly spliced to the bending part of another of the at least two display panels to form a support structure. A light-emitting diode (LED) substrate is disposed on the support structure.

Abstract: A spliced screen and a display terminal are disclosed. In the spliced screen, a structural component is disposed on two adjacent display panels and covers a splicing gap between the two adjacent display panels. A lamp plate is disposed on a surface of the structural component. When the spliced screen displays an image, a plurality of luminescent bodies disposed on the lamp plate close to the display panels also emit light, thereby preventing black strips from appearing on the image. In the spliced screen, a viewing angle of the display panels and a viewing angle of the lamp plate are same, so that a brightness of the display panels and a brightness of the lamp plates are same when the spliced screen is viewed from a lateral side. As such, display quality is improved.

Abstract: The embodiments of the application provide a tiled display, which includes a housing, a backlight unit arranged on a side of the housing, at least two supports provided in the housing and located on a light output side of the backlight unit, and at least two tiling liquid crystal display panels. The liquid crystal display panels are fixed on the housing and located on a side of the support away from the backlight unit. A bezel at the tiling of two adjacent liquid crystal display panels is arranged on the support, and a width of the bezel is greater than or equal to a width of the support.

Abstract: Display units for digital out of home advertising with orientation monitoring features are disclosed. The units include an electronic display, an orientation detection device, and a controller. The controller receives orientation data from the orientation detection device, determines a baseline orientation of the display unit, and where a subsequently detected orientation is not within a predetermined margin of the baseline orientation, electronically generates an alert.

Abstract: Embodiments of the present application disclose a display panel and a preparation method thereof, and a display device. The display panel comprises a polymer liquid crystal cell and a light source. The polymer liquid crystal cell comprises a first region close to the light source and a second region away from the light source, and the second region has a higher haze than the first region, thereby reducing the light emitting intensity close to the light source region and increasing the light emitting intensity away from the light source region, so that light guide and light emitting in each region of the polymer liquid crystal cell uniform.

Abstract: A display device includes a first polarizer, a dimming liquid crystal panel, a second polarizer, and a display panel stacked in sequence. The dimming liquid crystal panel includes a first substrate, a second substrate, a first liquid crystal layer, and a plurality of support pillars. Each of the support pillars includes a first end and a second end that are opposite to each other. The first end and the second end respectively abut the first substrate and the second substrate.

Abstract: An LED display panel and a display device are provided. The LED display panel includes at least one LED package module. The LED package module includes: a substrate; an electrode unit disposed on the substrate, the electrode unit comprising an anode layer and a cathode layer disposed opposite to the anode layer; at least one LED chip disposed on the anode layer and the cathode layer; a light shielding structure disposed on the substrate, wherein the light shielding structure comprises a plurality of baffles, the baffles are surrounded to form at least one cavity, and the LED chip is disposed in the cavity; a sealing glue layer disposed on the substrate.

Abstract: A display panel and a display device are provided. The display panel includes a substrate and a display unit. The display unit includes a pixel region and a light-shielding region. The pixel region includes at least a first sub-pixel, a second sub-pixel, and a third sub-pixel sequentially disposed on the substrate at intervals. The first sub-pixel, the second sub-pixel, and the third sub-pixel are formed of a first color resist material, a second color resist material, and a third color resist material, respectively. The light-shielding region surrounds the first sub-pixel, the second sub-pixel, and the third sub-pixel, and includes a first light-shielding layer and a second light-shielding layer. The first light-shielding layer has a first lower light-shielding region, and the second light-shielding layer has a first upper light-shielding region. The first lower light-shielding region and the first upper light-shielding region are formed of different color resist materials.

Abstract: A display module and an electronic apparatus. The display module may comprise: a display panel, which is provided with a display area and a non-display area arranged around the display area; a cover plate, which is located at the display side of the display panel, wherein the cover plate has a light-shielding area; and a bonding structure, which is located between the display panel and the cover plate, and two opposite surfaces of the bonding structure in a thickness direction are respectively bonded to the display panel and the cover plate. The bonding structure comprises a buffer layer; an orthographic projection of the bonding structure on a reference plane is at least partially overlapped with an orthographic projection of the non-display area on the reference plane, and is at least partially overlapped with an orthographic projection of the light-shielding area on the reference plane.

Abstract: A display system comprising a backlight device having a light emitting array, a liquid crystal panel, and a color filter having one or more absorbing dyes, wherein the one or more absorbing dyes are located in at least one color set of subpixels in the color filter. The one or more absorbing dyes may be a soluble, blue light, green light, or red light absorbing dye included in blue, green, or red subpixels of the color filter. A blue light absorbing dye may reduce transmission in a wavelength range of 415-435 nm, a green light absorbing dye may reduce transmission in a wavelength range of 490-570 nm, and a red light absorbing dye may reduce transmission of wavelengths less than 620 nm.

Abstract: A display panel is provided. The display panel includes a base substrate; a bank layer on the base substrate, the bank layer defining a plurality of bank apertures; a quantum dots material layer on the base substrate, the quantum dots material layer comprising a plurality of quantum dots blocks respectively in at least some of the plurality of bank apertures; a barrier coating layer in a respective one of the plurality of bank apertures; and an encapsulating layer on a side of the barrier coating layer closer to the base substrate. At least a portion of the barrier coating layer is in direct contact with a portion of the encapsulating layer.

Abstract: The present application discloses a display module and a display device. The display module includes a light grating assembly. The light grating assembly includes alternately arranged first regions and second regions, and liquid crystal molecules and dye molecules distributed in the first regions and the second regions. Arrangement of the liquid crystal molecules and the dye molecules are controlled to make the first regions light-transmissive and the second regions light-transmissive under a first mode and not light-transmissive under a second mode to form alternately light and dark stripes under the second mode.

Abstract: A display device is provided. The display device includes a back frame, a display module, and a polarizer. The back frame has a cavity, and the display module is disposed in the cavity. The polarizer is arranged on the display module and a body of the back frame surrounding the display module. The polarizer is extended to the back frame in the non-display area, thereby removing a front frame in the prior art, reducing a thickness of the display device, and increasing an area of the display area.

Abstract: An object of the present invention is to provide: a decorative sheet having a small tint change depending on observation directions and having excellent visibility of a pattern in any observation direction during observation from a front direction and an oblique direction; and a display device and an automobile interior material including the decorative sheet. The decorative sheet according to the present invention includes: a circularly polarized light reflection layer; and a decorative layer that is disposed on the circularly polarized light reflection layer and where an opening portion is provided.

Abstract: A light source module, a liquid crystal display device, and a display apparatus are provided. The light source module disposes a plurality of micro structures disposed at intervals on a light guide surface of a light guide plate and disposes a sum of areas of the micro structures on an unit area on the light guide surface gradually increasing from a light incident side to a light exiting side, which can improve uniformity of light exiting brightness of each region of the light guide plate.

Abstract: A light source module, a liquid crystal display device, and a display apparatus are provided. The light source module can provide a reflective liquid crystal display panel with an area light source similar to ambient light to improve light exiting brightness of a reflective liquid crystal display panel such that the reflective liquid crystal display panel also has a better display effect in a dark environment. Furthermore, the embodiment of the present application also disposes light sources on outer sides of at least two sides of a light guide plate in the light source module, which can improve light exiting brightness of the light guide plate.

Abstract: A backlight driving circuit and a display device are provided. The backlight driving circuit includes a light-emitting unit, a detection module, a power supply chip, and a voltage regulating module. The detection module receives a preset voltage and is electrically connected to a second electrode of the light-emitting unit to output a control voltage. The power supply chip is configured to output a reference voltage. The voltage regulating module receives the control voltage and the reference voltage, and is electrically connected to a first electrode of the light-emitting unit and a ground terminal to output a power supply voltage to the first electrode of the light-emitting unit.

Abstract: A display device includes a display panel, a backlight unit, and a light conversion sheet between the display panel and the backlight unit. The backlight unit includes a substrate and light-emitting sections arranged on the substrate, one or more light sources are disposed in each of the light-emitting sections, the light conversion sheet includes first partition walls and light conversion sections arranged to correspond to the light-emitting sections, a first partition wall of the first partition walls is disposed between adjacent light conversion sections of the light conversion sections. Each of the light conversion sections includes first quantum dots emitting a first light and second quantum dots emitting a second light having a color different from a color of the first light, and the at least one light source provides light of a predetermined wavelength to the light conversion sheet.

Abstract: A curved surface backlight module and a curved surface display device are provided. The backlight module includes a plurality of light-emitting units. The light-emitting units include reflector cups. The plurality of reflector cups include first reflector cups located in an edge partition and second reflector cups located in a central partition. The first reflector cups are asymmetric with respect to a first curved surface normal corresponding to a position at where the first reflector cups are located. A maximum brightness center of the first reflectors of the edge partition can be made to emit light parallel to a user's viewing direction, and brightness attenuation at an edge of a display device can be relieved.

Abstract: The present application discloses a display backplane and a display device. The display backplane includes a plurality of light-emitting sub-areas; each of the light-emitting sub-areas is provided with at least two light-emitting portions; a first light-guiding portion is arranged in each of the light-emitting sub-areas and is located between the at least two light-emitting portions, and a side of the first light-guiding portion close to the light-emitting elements has a second light-reflecting surface, and an orthographic projection of a portion of a side of the first light-guiding portion away from the substrate on the substrate falls within an orthographic projection of a portion of a side of the first light-guiding portion close to the substrate on the substrate.

Abstract: The present application provides a backlight module and a liquid crystal display device; the first portion of the slit adhesive is formed with a notch, so that when internal stress generates in the slit adhesive due to environmental changes, the internal stress can be released through the notch, thereby preventing the slit adhesive from warping and improving the yield of the backlight module.

Abstract: Disclosed are a backlight module and a display device. The backlight module includes a plurality of light-emitting units disposed at intervals with one another, an optical film, and a concentrating structure. A slit is between two adjacent light-emitting units. The optical film is disposed at a side of the light-emitting unit. The concentrating structure is disposed at a side of the optical film close to the light-emitting unit and arranged in an area opposite to the slit. The concentrating structure comprises a plurality of protrusions.