Abstract: The disclosure is directed to systems for providing illumination to a measurement head for optical metrology. In some embodiments of the disclosure, illumination beams from a plurality of illumination sources are combined to deliver illumination at one or more selected wavelengths to the measurement head. In some embodiments of the disclosure, intensity and/or spatial coherence of illumination delivered to the measurement head is controlled. In some embodiments of the disclosure, illumination at one or more selected wavelengths is delivered from a broadband illumination source configured for providing illumination at a continuous range of wavelengths.

Abstract: This disclosure provides systems, methods and apparatus for reducing ambient light reflections from a surface of a display device in a power efficient manner. The display device includes a reflecting circular polarizer (RCP) and an absorbing circular polarizer (ACP) having the same polarity. The RCP provides light recycling functionality, while the ACP provides ambient light reflection suppression. In some implementations, the light generated by the display device is polarized by the RCP before it is incident on the ACP, which is located at the front of the display device. Because the polarities of the RCP and the ACP are the same, the ACP substantially passes all of the incident polarized light towards the front of the display device.

Abstract: Provided is a wavelength plate that can increase incident angle tolerance. The wavelength plate in which a high refractive index layer and a low refractive index layer are alternately stacked, each layer having a concave-convex structure the period of which is equal to or shorter that a wavelength in one direction within a plane, includes, as periods in the thickness direction of the high refractive index layer and the low refractive index layer: a first period defined so that a used wavelength can belong to the first band of a photonic band structure; and a second period defined so that the used wavelength can belong to a wavelength side longer than the center wavelength of the second band of the photonic band structure.

Abstract: Image projection illumination apparatus and methods are provided. A color wheel has a blue laser light reflecting region and other regions respectively coated with different color light emitting phosphors. Blue laser light of a given polarization is directed by reflection or transmission by a blue laser light polarization selective filter through a polarization changing element with changed polarization onto the color wheel. When the color wheel reflecting region is aligned with the incident light, incident light is reflected back through the polarization changing element with further changed polarization by the other of reflection or transmission by the filter for image projection. When the other regions are respectively aligned with the incident light, the different color light is emitted by the phosphors along the light path for image projection.

Abstract: An illumination optical system is capable of changing a light beam diameter in one of first and second cross sections orthogonal to each other that include an optical axis, and includes a light source, a condenser lens that concentrates light from the light source, a first fly-eye lens including a first lens cell on which light concentrated by the condenser lens is incident, a second fly-eye lens including a second lens cell, a polarization conversion element that performs polarization conversion on light from the second fly-eye lens, and an image display element that displays an image based on light from the polarization conversion element, and widths of the image display element and a light emitting surface of the light source, widths of the first and second fly-eye lens, and change rates ? and ? of the light beam diameters are set within appropriate ranges.

Abstract: Disclosed is an expandable envelope that comprises a light directing film this both transmits and reflects light. In its inflated form and along with a light source, the envelope forms a light balloon that due to the light directing film provides directed light to an area surrounding the balloon.

Abstract: A polarization plate is provided for use between a light source and a display panel, where the light source is configured to emit light having a plurality of planes of polarization and the display panel is configured to have a predetermined polarization axis. The plate includes a repolarization region and a prepolarization region. The repolarization region is configured to diffuse and to depolarize or rotate at least one plane of polarization of the light passing therethrough. The prepolarization region is disposed adjacent to and in contact with the repolarization region. The prepolarization region is configured to be substantially nonabsorbent, to allow passage of light having a plane of polarization that is substantially aligned with the predetermined polarization axis, and to prevent passage of light having a plane of polarization that is not substantially aligned with the predetermined polarization axis. In another embodiment, an interface is provided between the regions.

Abstract: A display apparatus includes a display part operable to display an image; and a bezel part disposed at an edge of the display part, wherein at least a portion of a front surface of the display part and a front surface of the bezel part are coplanar.

Abstract: A display apparatus comprising a display panel, a light module and a haze element is provided. The light module comprises a light guide plate, a plurality of light guide elements and a first light emitting unit. The light guide plate comprises at least a light-entering surface and two opposite side surfaces. The light guide elements are disposed on at least one of the two side surfaces. The first light emitting unit is disposed on the light-entering surface. The haze element, disposed on the upper surface or the lower surface of the display panel, has a haze ranging between 1% and 10%. After the light emitted from the first light emitting unit enters the light guide plate, the light with the bright state being staggered with the dark state is guided from one of the side surfaces of the light-guiding plate.

Abstract: An optical film includes: a first optical phase retardation layer having a relation nx1?ny1?nz1; a second optical phase retardation layer disposed under the first optical phase retardation layer and having a relation nx2?ny2<nz2; and a third optical phase retardation layer disposed on the first optical phase retardation layer and having a relation nx3?ny3<nz3, where nzi (i=1, 2, 3) denotes a refractive coefficient in a thickness direction of the i-th optical phase retardation layer, and nxi and nyi denote refractive coefficients in two orthogonal directions in a plane substantially perpendicular to the thickness direction of the i-th optical phase retardation layer.

Abstract: A display device for outdoor use has a display unit, and the display unit includes a polarizing plate having a light absorbing layer and a polarizer layer on a viewing side surface, the light absorbing layer includes a first light absorbing agent having at least one absorption peak in a wavelength range of from 280 to less than 360 nm and a second light absorbing agent having at least one absorption peak in a wavelength range of from 360 to 400 nm, and the light absorbing layer is disposed closer to the viewing side than the polarizer layer.

Abstract: The polarization beam splitting element includes a one-dimensional grating structure having a grating period smaller than a wavelength of an entering beam and including a metal grating portion, and two light-transmissive members each having a refractive index higher than that of air. The one-dimensional grating structure is disposed between the two light-transmissive members. The grating period of the one-dimensional grating structure is 120 nm or less, a thickness of the one-dimensional grating structure is 100 nm or less and an inter-grating portion of the one-dimensional grating structure is formed as a vacuum space or formed of air or a dielectric material. The grating period ? [nm], a filling factor FF that is a ratio w/? of a width w [nm] of the grating portion to the grating period, a refractive index na of the inter-grating portion and a wavelength ?g of 550 [nm] satisfy (1.4na?2.9)?/?g?0.57na+1.32?FF?(1.4na?2.9)?/?g?0.57na+1.39 and 0.152np?1.375(?/?g)+0.5?FF?0.152np?1.375(?/?g)+0.6.

Abstract: An electronic device display may have an organic light-emitting diode layer that emits light to form images for a user. Reflective structures such as metal signal lines may be present in the organic light-emitting diode layer. Ambient light reflections from the metal signal lines may be suppressed using a circular polarizer on the organic light-emitting diode layer. To increase light emission efficiency from the organic light-emitting diode display layer under low ambient light conditions in which ambient light reflections are not significant, the polarization efficiency of the circular polarizer may be reduced. Control circuitry may make measurements of ambient light intensity using an ambient light sensor and can control the polarization efficiency of the circular polarizer accordingly by applying adjustable amounts of light or electric field. Polarization efficiency may also be adjusted using a photosensitive polarizer material that responds directly to changes in ambient light level.

Abstract: A hybrid backlight unit embeddable in liquid crystal display and method for fabricating the same is disclosed. The hybrid backlight unit uses chemically toughened glass as substrate, which, after optical layers are stacked thereon using photochemical lithography and coating-printing process, laminates with a polarizing film to form an optical substrate with hybrid planar light source capable of producing polarization effect. The optical substrate with hybrid planar light source may be incorporated in the fabrication of liquid crystal panel as its lower glass substrate and lower polarizing film. Finally an external structure is attached to the liquid crystal panel to form a hybrid backlight unit embeddable in liquid crystal display. The hybrid backlight unit embeddable in liquid crystal display described above offers the advantages of high luminance, ultra thinness and high efficiency in fabrication.

Abstract: A display device includes: a display panel assembly; and a backlight unit. The backlight unit includes an optical sheet, a reflective sheet and a light source. One of the optical sheet and the reflective sheet includes a material which supplies a sound by receiving an electrical field.

Abstract: A display apparatus includes a display panel, a light source part disposed under the display panel configured to supply light to the display panel, and a receiving container. The receiving container is configured to receive the display panel and the light source part. The receiving container includes a bottom portion and a first side wall extending from a first side of the bottom portion along a direction substantially perpendicular to the bottom portion. A first protrusion is formed inside of the first side wall. The first protrusion is disposed between a lower surface of the display panel adjacent to the first side of the display panel and an upper surface of the light source part. The receiving container includes metal.

Abstract: A touch panel display device including a display panel displaying an image; a polarizing plate attached onto the display panel; a touch panel on and spaced apart from an upper portion of the polarizing plate; a resin layer between the touch panel and the polarizing plate, the resin layer bonding the touch panel and the polarizing plate; a window on the touch panel; and a reinforcement layer between the window and the touch panel or between the touch panel and the resin layer, wherein the reinforcement layer prevents damage to the touch panel caused by bending stress.

Abstract: A flexible display device includes a flexible display panel, a cover window disposed on an outer side of the flexible display panel, and a polarizing plate disposed between the flexible display panel and the cover window. The cover window includes a protrusion and depression portion having protrusions and depressions formed in an inner surface thereof.

Abstract: An optical element that can reduce the etendue of emitted light emitted from the optical element without having depend on the etendue of light-emitting elements is provided with a plasmon-excitation layer that is interposed between two layers having dielectric properties wherein, taking the plasmon-excitation layer as a border, the effective dielectric constant of the emission-side portion that is the emission layer side is higher than the effective dielectric constant of the incident-side portion that is the side of a carrier-generating layer, and the dielectric constant between the plasmon-excitation layer and the carrier-generating layer is higher than the dielectric constant between the carrier-generating layer and the light-incident surface.

Abstract: Methods and systems are described herein which produce polarization-independent full color images suitable for rear-projection television sets and other multimedia displays. The system uses illumination with R, G, B light from two different light sources for each color. A viewer wears glasses with narrowband optical filters, preferably holographic filters. The R, G, B light from the light sources is slightly offset at each of the 3 emission wavelengths, with one set of R, G, B light being filtered by the holographic filter in front of the left eye of the, and the other set of R, G, B light being filtered by the holographic filter in front of the viewer's right eye.

Abstract: Disclosed is a flexible display device capable of preventing a bending phenomenon occurring in a high-temperature and high-humidity state, by preventing water from being introduced thereinto, by forming a barrier layer formed of acryl instead of the conventional tri-acetyl cellulose (TAC) film, on the surface of a polarizing device, the barrier layer having a low coefficient of humidity expansion and a low coefficient of thermal expansion. The flexible display device comprises: a display panel configured to output an image; and a polarizing plate attached to an upper surface of the display panel, wherein the polarizing plate comprises: a polarizing device; and a barrier layer formed of an acryl-based resin, and formed on one surface of the polarizing device.

Abstract: There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.

Abstract: An illumination optical system is configured to illuminate an optical modulator configured to modulate incident light and includes a condenser lens system that includes a meniscus lens with a concave on a light source side, and condenses light from a light source; and a spherical aberration corrector disposed on an optical modulator side of the condenser lens system. The illumination optical system satisfies: 0.6<|f/L|<1.4 0.9<sin ??1.0 where f is a focal length of the condenser lens system, L is a length from an object-side principal point of the condenser lens system to the light source, and ? is half an angle at which the condenser lens system takes in the light from the light source.

Abstract: A fluorescent screen includes phosphor regions 1-R, 1-G, diffusion region 1-B and reflecting means 10 formed on a region that includes phosphor regions 1-R and 1-G and diffusion region 1-B. Reflecting means 10 includes fluorescent light reflecting layer 11, phase difference layer 12, and polarizing layer 13 deposited in that order. Fluorescent light reflecting layer 11 transmits excited light 4 and reflects fluorescent light from phosphor regions 1-R and 1-G. Polarizing layer 13 both transmits excited light 4 and, of diffused light of the excited light (4) that was entered from diffusion region 1_B through Phase difference layer 12, transmits TM polarized light and reflects TE polarized light.

Abstract: To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from the light source 11; a lens array 22 including a plurality of element lenses and configured to diverge the light scanned by the optical scanning section; an optical path conversion system 23 configured to control a diverging angle of the diverging light to be emitted from respective points of the lens array 22 and to allow the diverging light whose diverging angle has been controlled to illuminate an area to be illuminated sequentially in an overlapping manner.

Abstract: The present disclosure relates to a digital hologram display device displaying 3D image as a hologram by using a complex modulation. The digital hologram display device comprising a spatial light modulator including a first pixel outputting a first modulation light by modulating a phase of a first plane-polarized light and a second pixel outputting a second modulation light by modulating the phase of the first plane-polarized light, wherein the second pixel is adjacent to the first pixel; and a light combiner changing a path of the first modulation light outputted from the first pixel so that the path of the first modulation light corresponds to a path of the second modulation light outputted from the second pixel for combining the first modulation light with the second modulation light, wherein a phase of the first modulation light is different from a phase of the second modulation light.

Abstract: The present invention provides a light guide plate for emitting light radiated from a light source disposed at a side of the light guide plate. The light guide layer has a light incidence side for internally introducing light emitted from the light source at the side thereof; a polarization separation layer comprising a first matrix layer and a first fiber having birefringence and disposed more toward the light emission side than the light guide layer; a low refractive index layer having a lower refractive index than the refractive index of the first matrix layer; and an angle improvement layer comprising a second matrix layer having a second fiber disposed inside the second matrix layer.

Abstract: A backlight module includes a light-guiding plate, a back-light source disposed at a side of the light-guiding plate, and a frame structure disposed surrounding the light-guiding plate. The frame structure includes a border component, at least one first convex, and at least one second convex. The border component includes at least one first border and at least one second border. The first border and the second border are adjacent to each other and distributed along a first direction and a second direction respectively. The first convex protrudes from the inner surface of the first border and extends inward along the second direction. The second convex protrudes from the inner surface of the second border and extends inward along the first direction. The first direction is vertical to the second direction, and the top of the vertical height of the first convex is lower than that of the second convex.

Abstract: A display device includes a display panel including a display area for displaying an image and a non-display area adjacent to the display area, a polarizing plate positioned on the display panel and including a polarizing layer for polarizing light that passes through the polarizing layer, and a light shielding layer positioned between the display panel and the polarizing plate. The light shielding layer is formed at an edge of the display panel to correspond to the non-display area.

Abstract: An object is to implement a narrowed picture-frame while suppressing the occurrence of light leakage and a reduction in luminance in an edge-light type backlight device. A backlight device is composed of LEDs (40); a side chassis (51) supporting a board having the LEDs (40) mounted thereon; a light guide plate (20) for allowing light emitted from the LEDs (40) to exit toward a liquid crystal panel in a planar manner; a reflection sheet (30) for allowing light traveling toward a back surface side within the light guide plate (20) to be reflected thereby; optical sheets (10) including a reflection type polarizer (11), a prism sheet (12), and a diffuser (13); and a top chassis (52) disposed on top of the optical sheets (10). Black printing (60) is provided in a part of the region of the diffuser (13).

Abstract: This application describes a back-lit transmissive display including a transmissive display (620) and a variable index light extraction layer (640) optically coupled to a lightguide (630). The variable index light extraction layer has first regions (140) of nanovoided polymeric material and second regions (130) of the nanovoided polymeric material and an additional material. The first and second regions are disposed such that for light being transported at a supercritical angle in the lightguide, the variable index light extraction layer selectively extracts the light in a predetermined way based on the geometric arrangement of the first and second regions. The transmissive display may be a transmissive display panel or a polymeric film such as a graphic.

Abstract: Multilayer optical films are disclosed that exhibit high reflectivity at normal incidence for all polarizations but preferentially transmit high angle rays in one or two orthogonal planes of incidence. Both symmetrical and asymmetrical constructions are disclosed. The films can be used in direct-lit backlights and in lighting systems other than direct-lit backlights, such as edge-lit backlights, and non-backlight lighting systems such as systems intended for general illumination without the need for any graphic component, such as luminaires and task lights.

Abstract: In exemplary implementations of this invention, a flat screen device displays a 3D scene. The 3D display may be viewed by a person who is not wearing any special glasses. The flat screen device displays dynamically changing 3D imagery, with a refresh rate so fast that the device may be used for 3D movies or for interactive, 3D display. The flat screen device comprises a stack of LCD layers with two crossed polarization filters, one filter at each end of the stack. One or more processors control the voltage at each pixel of each LCD layer, in order to control the polarization state rotation induced in light at that pixel. The processor employs an algorithm that models each LCD layer as a spatially-controllable polarization rotator, rather than a conventional spatial light modulator that directly attenuates light. Color display is achieved using field sequential color illumination with monochromatic LCDs.

Abstract: The present invention provides a circular polarization illumination device which can irradiate right-circularly polarized light at a large light amount from a light source of right-circularly polarized light with a high efficiency and can irradiate left-circularly polarized light at a large light amount from a light source of left-circularly polarized light with a high efficiency, and a plant growth regulation method that can efficiently regulate the promotion or inhibition of the growth of plants by using the circular polarization illumination device. Moreover, the illumination device includes a light-emitting light source, a reflective polarizing plate, reirradiation unit, and circular polarization conversion unit.

Abstract: The present invention provides an illuminating device that makes it possible to reduce the number of members for regulating a polarization state and can irradiate light having natural color shades without decreasing energy efficiency of light irradiation, and a plant growth regulation method using the illuminating device. The illuminating device of the present invention includes a light-emitting light source and a polarization state regulation member that regulates a polarization state of the light-emitting light source, in which the polarization state of a wavelength region of a portion of emission wavelengths is changed to circular polarization, and a degree of circular polarization of light in a wavelength band for regulation among the light rays to be irradiated is 0.3 or higher. In a preferable embodiment, a width of at least one wavelength band for regulation of the polarization state regulation member is from 60 nm to 250 nm.

Abstract: A reflective polarizer of the invention has excellent optical properties even though a very small number of polymer components per unit area is disposed inside a matrix thereof compared to reflective polarizers of the related art, which include birefringent polymer, since the polymer inside the matrix has a plate-like shape. This is advantageous for covering the entire range of visible light, since a plate-like polymer having a variety of optical thicknesses can be used. The additional processing of bonding the skin layer is not performed, since the skin layer is formed on at least one surface of the core layer in the state in which it is molten. This can greatly reduce manufacturing costs, and is advantageous in that it maximizes optical properties in a limited thickness.

Abstract: A light combiner having a polarization separation film and transmitting P-polarized light from a first light source unit whereas reflecting S-polarized light from a second light source unit forms combined light, and the angle of incidence of the light from the first light source unit and the angle of incidence of the light from the second light source unit with respect to the polarization separation film are each greater than 45°.

Abstract: There is disclosed a polarization-modulating element for modulating a polarization state of incident light into a predetermined polarization state, the polarization-modulating element being made of an optical material with optical activity and having a circumferentially varying thickness profile.

Abstract: A light source apparatus includes a polarization conversion element, a fluorescent substance and a light source element. The polarization conversion element has a p/s-polarizing beam splitter film to separate polarization components of incident light into p-polarization component and s-polarization component. The fluorescent substance emits visible light as the incident light that is incident on the p/s-polarizing beam splitter film, which visible light is generated by that the fluorescent substance is excited by excitation light, and has a wavelength of longer wavelength region than a wavelength of the excitation light. The light source element emits a laser beam having a predetermined wavelength as the excitation light to irradiate the fluorescent substance with the excitation light so that a laser beam having a polarization plane between the polarization plane of p-polarized light and the polarization plane of s-polarized light exiting from the fluorescent substance is emitted as the incident light.

Abstract: A light module for a projection apparatus, comprising a laser apparatus adapted to emit linearly polarized radiation in the blue wavelength range, a luminous wheel arranged in the beam path of the radiation emitted by the laser apparatus, a first beam splitter arranged in the beam path of the radiation emitted by the laser apparatus between the laser apparatus and the luminous wheel, a focusing apparatus arranged in the beam path of the radiation emitted by the laser apparatus between the first beam splitter and the luminous wheel, and at least one polarization manipulation apparatus, adapted to rotate the polarization of radiation that has passed through it twice in different directions through 90°, wherein the first beam splitter is arranged such that it is also located in the beam path of radiation in the blue wavelength range which has passed twice through the polarization manipulation apparatus in different directions.

Abstract: A quantum rod light-emitting display device according to an embodiment of the invention includes a display panel including a first substrate, a second substrate opposite to the first substrate, and a quantum rod layer formed between the first substrate and the second substrate, wherein a plurality of quantum rods are arranged in the quantum rod layer in one direction; and a polarizer disposed on the display panel and including a quarter wave plate (QWP) layer and a polyvinyl alcohol (PVA) layer, wherein the PVA layer transmits only light linearly polarized in a first direction, and wherein the QWP layer is disposed under the PVA layer, and the QWP layer circularly polarizes the light linearly polarized in the first direction or linearly polarizes light reflected by the display panel in a second direction.

Abstract: An electronic device may have a display such as a liquid crystal display. The display may have multiple display layers for generating display light such as a color filter layer and a thin-film transistor layer. The display may include first and second layers of optical fibers formed over the display layers. The first and second layers of optical fibers may guide display light generated in the display layers to an outer surface of the display. The first layer of optical fibers may include optical fibers having a first numerical aperture. The second layer of optical fibers may include optical fibers having a second numerical aperture. The first numerical aperture may be smaller than the second numerical aperture. The second layer of optical fibers may include vertical and angled optical fibers. The angled optical fibers may help reduce the size of an inactive region around the center of the display.

Abstract: An optical filter having improved visibility under external light and an organic light-emitting device including the same.

Abstract: An optically active structure (100) is provided, comprising at least two different groups (G1, G2) of optically active nanorods (104A, 104B). The groups of nanorods differ from one another in at least one of wavelength and polarization of light emitted thereby in response to pumping light. The nanorods of the same group are homogeneously aligned with a certain axis of alignment being substantially parallel or substantially perpendicular to an axis of alignment of the nanorods of at least one other group, such that the nanorods of said at least two groups have one or two axes of alignment. The optically active structure is used as colour polarized light source for displays.

Abstract: An illumination optical system includes: a light source emitting light of a first wavelength; a fluorophore unit; an optical element and a quarter-wave plate between the optical element and the fluorophore unit The fluorophore unit has a reflection region and a fluorophore region that gives off fluorescent light of a different wavelength than the first wavelength when irradiated by light of the first wavelength. The fluorophore unit is able to move such that the light from the light source sequentially irradiates the fluorophore region and the reflection region.

Abstract: A polarization structure may include at least one adhesion layer, a phase retarder layer disposed over the adhesion layer, a polarization layer disposed over the phase retarder layer, and a light blocking member disposed over a peripheral portion of the polarization layer, under the peripheral portion of the polarization layer or under a peripheral portion of the phase retarder layer. When a display device includes the polarization structure having the light blocking member, the display device may display an image with improved visibility and uniformity in an entire display area although the display device has a minimized bezel or does not have any bezel.

Abstract: Embodiments comprise a device that can efficiently produce a highly resolved intensity profile that can be easily switched to various specific configurations with binary word strings defining output intensities that after summation will be combined to form a single colors intensity depth. Arraying these devices allows an image line of single color pixels to be efficiently produced without gross scintillation effects. The non-coherent output is desirable in this application as it reduces scintillation effects on the screen or final image.

Abstract: A display apparatus at least comprises a touchscreen, and a symmetric diffusion film (SDF) disposed above the touchscreen. The SDF comprises at least two different materials, including a first material mixed with a second material. The first material has a first refractive index and the second material has a second refractive index, and the first refractive index is different from the second refractive index.

Abstract: An alignment film capable of reducing occurrence of alignment disorder in a simple manner, a method of manufacturing the alignment film, a retardation film, a method of manufacturing the retardation film, and a display are provided. An alignment film is configured of an anchor layer and an alignment layer stacked in this order on a base. The alignment layer includes a groove region having a plurality of fine grooves on a surface thereof, and a groove region having a plurality of fine grooves on a surface thereof. The anchor layer provided between the base and the alignment layer is provided with an antistatic function in addition to a function of bringing the alignment layer into close contact with the base.

Abstract: A frame structure applicable to a touch device is disclosed. The frame structure includes a housing carrying a backlight unit; a first frame disposed on the backlight unit and having first and second abutting surfaces that are perpendicular to each other; a panel disposed on the first frame; a polarizer attached to the panel; a second frame disposed outside the housing and the first frame and abutting against the second abutting surface of the first frame; and a cover plate attached to the first abutting surface of the first frame and bonded to the second frame through an adhesive layer, thereby reducing the gap between the cover plate and the panel, enhancing the strength of the cover plate, causing a touch experience to be more sensitive and precise, reducing the use of adhesive and increasing the product yield.