Abstract: An alignment system uses a self-referencing interferometer that incorporates an objective lens system having a plurality of lens element groups. In an embodiment, the objective is configured and arranged to provide a large numerical aperture, long working distance, and low wavefront error.

Abstract: The lighting of a person via incident light radiation is controlled to address dazzling. The light radiation originates from a source of light and passes through a medium of variable and controllable opacity. The position of the source of light relative to the person can vary. A zone of the eyes of the person and a position of the zone of the eyes relative to the medium is detected. A incidence of dazzling of the zone of the eyes is detected. In response to the detection, the direction of incidence of the light radiation is determined. From this determination, from the position of the zone of the eyes, a region of said medium is identified that has a projection on the face of the person which includes said zone of the eyes. The opacity of the region of the medium is then modified in a controlled manner to preclude dazzling.

Abstract: Systems and methods for direct projection of images onto an eye retina including, for example, systems and methods for directing a projection/imaging optical path so as to track a location of the eye in accordance with a gaze direction thereof. This enables for projecting images onto specific/fixed locations on the eye retina, while the gaze direction changes.

Abstract: A display apparatus allows a user to visually recognize a virtual image. The virtual image has luminance characteristics according to which a dependence of luminance on viewing angle changes along a certain direction.

Abstract: Disclosed herein are systems, methods, and devices for implementing a heads-up display (HUD) that is viewable in conditions where a viewer is wearing a p-polarized eyewear, eyewear polarized between s-polarized and p-polarized, or not. Thus, employing the aspects disclosed herein, a viewer may realize all the benefits of a HUD implementation (for example, one implemented via a vehicle), while realizing all the benefits of wearing polarized eyewear.

Abstract: Provided is a small-sized information display device displaying video image information as a virtual image by use of an eyepiece optical system including a concave mirror having desired reflection characteristics in a specific polarization direction, where a liquid crystal display panel is used as a video image light source. The information display device has a liquid crystal display panel as a flat display forming video image information disposed therein, and includes a virtual image optical system including a member to be projected for displaying virtual images in front of a vehicle by making a video image displayed on the liquid crystal display panel reflect on the member to be projected. The virtual image optical system includes a concave mirror, and a reflective film of the concave mirror has desired reflection characteristics in a specific polarization direction, so that virtual images having uniform brightness and chromaticity can be obtained.

Abstract: Examples are disclosed that relate to the use of diffractive filtering in a waveguide display system. One example provides a display system including a light source, a first waveguide configured to conduct light of a first wavelength band from the light source, the first waveguide comprising a first input coupler, a second waveguide configured to conduct light of a second wavelength band from the light source, the second waveguide comprising a second input coupler, and a diffractive filter positioned optically between the first waveguide and the second waveguide, the diffractive filter being configured to diffract light of the first wavelength band and transmit light of the second wavelength band.

Abstract: A virtual image generation system for use by an end user comprises a projection subsystem configured for generating a collimated light beam, and a display configured emitting light rays in response to the collimated light beam to display a pixel of an image frame to the end user. The pixel has a location encoded with angles of the emitted light rays. The virtual image generation system further comprises a sensing assembly configured for sensing at least one parameter indicative of at least one of the emitted light ray angles, and a control subsystem configured for generating image data defining a location of the pixel, and controlling an angle of the light beam relative to the display based on the defined location of the pixel and the sensed parameter(s).

Abstract: An eyepiece for use in front of an eye of a viewer includes a waveguide configured to propagate light therein, and a diffractive optical element optically coupled to the waveguide. The diffractive optical element includes a plurality of first ridges protruding from a surface of the waveguide. Each of the plurality of first ridges has a first height and a first width. The diffractive optical element further includes a plurality of second ridges. Each of the plurality of second ridges protrudes from a respective first ridge and has a second height greater than the first height and a second width less than the first width. The diffractive optical element is configured to diffract a portion of a light beam incident on the diffractive optical element toward the eye as a first order transmission.

Abstract: Items of headwear are disclosed. An item of headwear has a battery, and an information portal. The information portal includes an input device, a human interface device, and a content providing system. The content providing system has non-transitory computer memory with a program with instructions for receiving information from the input device, and relaying the information to the human interface device. The content providing system further includes a processor, an output device, and a networking device.

Abstract: An optical apparatus for near-eyes display includes a support body, a display screen disposed in the support body, a convex lens, and a reflector reflecting light. The light of the display screen pass through the convex lens and are amplified by the convex lens. The amplified light enters into the reflector and is reflected to human eyes. The convex lens is disposed between the reflector and the display screen. The reflector and the convex lens form a fixed included angle and are not parallel to each other. The reflector and the convex lens are at a same axis position.

Abstract: A system for structuring a directed energy beam includes one or more coherent light sources that emit one or more initial light beams, one or more spatial light modulators that modulate the one or more initial light beams, and a beam combiner that coherently adds orbital angular momentum beams to create a reconfigurable spatial region of localized power that forms the directed energy beam. Each spatial light modulator is loaded with a pattern that receives an incident light beam and outputs an orbital angular momentum beam. The pattern encodes one or more orthogonal orbital angular momentum functions. Characteristically, each orbital angular momentum having an associated complex weight with which each orbital angular momentum beam is weighted in forming the coherent addition.

Abstract: A diffractive optical element (DOE) is designed to implement both a collimation function with respect to an input divergent beam and a beam shaping function with respect to an output divergent beam. The phase designs of the collimation function and the beam shaping function are independently produced in the phase domain. These phase designs are then combined using a phase angle addition of the individual functions and wrapped between 0 and 2? radians. The diffractive surface of the DOE is then defined from the wrapped phase angle addition of the individual functions.

Abstract: A head-up display includes a projector and an optical combiner configured to reflect light from the projector while allowing other wavelengths of light to pass through the optical combiner. The projector has two or more image sources, and two or more optical components, each of which is associated with a corresponding one of the image sources. In a typical implementation, the two or more optical components are closely situated to approximate an effective aperture that is larger than the actual aperture of either optical component. In such an implementation, since the actual aperture of each respective optical element is smaller than the larger effective aperture, it is generally much easier to correct for optical aberrations and the like, than it would be if a single optical element with a larger actual aperture were used.

Abstract: A stereo viewing device comprises a first lens comprising a first lens filter, and a second lens comprising a second lens filter. The first lens filter comprises a first set of light absorbing dyes that define a first set of rejection bands. The first set of light absorbing dyes comprises at least a first polymethine dye. The second lens filter comprises a second set of light absorbing dyes that define a second set of rejection bands different from the first set of rejection bands. The second set of light absorbing dyes comprises at least a second polymethine dye.

Abstract: A speckle-free imaging light source based on a random fiber laser (RFL) using a strong-coupling multi-core optical fiber, relating to a field of optical fiber laser illumination light source, is provided, mainly including a pumping source and an optical fiber loop mirror, and further including the strong-coupling multi-core optical fiber with/without a single-mode optical fiber. Through directly adopting the strong-coupling multi-core optical fiber or combining the single-mode optical fiber with the strong-coupling multi-core optical fiber to serve as a main device in the RFL-based illumination light source, the generated RFL has multiple transvers modes and low spatial coherence which prevent speckle formation during illumination, which provides an ideal illumination light source for high-speed full-field speckle-free imaging technology.

Abstract: Provision of a spectacle lens provided with a satisfactory degree of polarization from the perspective of ability to suppress glare, as well as with high luminous transmittance, the spectacle lens having a high degree of freedom of frame selection relative to the prior art, and enabling the reduction of the turnaround time from order receipt to delivery; and spectacles. A spectacle lens having a lens substrate and a dichroic pigment coating layer directly on the lens substrate or on the lens substrate via another layer, the spectacle lens having a degree of polarization of 10% to 60% and a luminous transmittance of more than 75%, and spectacles having the spectacle lens and a frame to which the spectacle lens is mounted.

Abstract: An optical element has a transmission spectrum characterized in that a local maximum falls within a wavelength region longer than 315 nm but shorter than or equal to 400 nm, a local minimum falls within a wavelength region longer than or equal to 380 nm but shorter than or equal to 500 nm, and the wavelength at the local maximum is shorter than the wavelength at the local minimum.

Abstract: Eyeglass frames include a face member and two temple members connected to the face member. The face member includes a rim with a brow configured to retain at least one lens. A nose member is connected to the face member and supports the rim separated from a face of a wearer by a gap. A vent passage is provided in the brow and extends from a front portion of the brow to a rear portion of the brow. A vent adjustment member provided on the brow directly above the at least one lens. The vent adjustment member is configured to move between a first position wherein the vent passage is substantially closed and a second position wherein the vent passage is open. The vent adjustment member is substantially flush with a medial portion and a lateral portion of the brow when the vent adjustment member is in the first position and offset from the medial portion and lateral portions of the brow when the vent adjustment member is in the second position.

Abstract: An optical device includes a nanostructured transparent dielectric film, which is a Huygens metasurface. The Huygens metasurface imparts a phase change to light propagating through or reflecting from the surface. The phase change can be achieved by means of a resonant interaction between light and the Huygens resonators, resulting in a controllable phase change of 0 to 2? with approximately 100% light transmission characterized by a below 0.1 dielectric loss tangent of delta and with the height of the resonators less than the wavelength of light. In one embodiment, the metasurface includes titanium dioxide, but many materials or stacks of different materials may be used. The optical device is functional throughout the visible spectrum between 380 and 700 nm. The nanostructured transparent dielectric film includes a plurality of Huygens resonators.

Abstract: A modulator drive circuit, including: a first transistor having: a first output terminal connected to a first reference voltage, a second output terminal connected to a first output terminal of the modulator drive circuit, and a control terminal; and a second transistor having: a first output terminal connected to a second reference voltage different from the first reference voltage, a second output terminal connected to the first output terminal of the modulator drive circuit, and a control terminal.

Abstract: Provided is a semiconductor optical integrated circuit which consumes less electric power than a conventional semiconductor optical integrated circuit. A semiconductor optical integrated circuit (1) includes a semiconductor layer (13) in which (i) an optical waveguide (LG) including heated section I1 through I3 and (ii) heater parts H1 and H2 are provided. The optical waveguide (LG) meanders such that the heated sections I1 through I3 are juxtaposed to one another. Each heater part Hi is arranged between a heated section Ii and a heated section Ii+1 which are adjacent to each other.

Abstract: A system and method for improving spatial light modulator (SLM) devices such as Surface Acoustic Wave (SAW) modulators are disclosed. The SAW modulators can improved angular bandwidth and suppress unwanted diffractive orders. In one example, a coating layer(s) is applied to a proximal face of the SAW modulator to improve coupling of guided modes into leaky modes. Additionally, applying coating layers(s) such as a hybrid anti-reflective/highly reflective coating to an exit face of the SAW modulator can suppress transmission of undesired diffractive order(s).

Abstract: A liquid crystal optical element having a variable optical power includes a first substrate and a second substrate, a liquid crystal layer provided between the first substrate and the second substrate, an electrode configured to apply a voltage to the liquid crystal layer and to change the liquid crystal layer from an electro-inactive state to an electro-active state, a homogeneous alignment layer provided between the first substrate and the liquid crystal layer, a homeotropic alignment layer provided between the second substrate and the liquid crystal layer; and a diffraction grating provided on a surface of the second substrate on a side of the liquid crystal layer.

Abstract: A device includes a number of grating stages having a liquid crystal layer disposed between at least two substrates, where at least one is coated with a photo-alignment layer and transparent electrodes. Each grating stage may be switchably responsive to a voltage, with grating periods of each grating stage selected such that, when the voltage is applied to a grating stage and a laser beam is passed therethrough, optical energy from the laser beam in plus and minus first orders is deflected toward sides of the grating stage and optical energy from a zero order of the laser beam is allowed to pass through the grating stage. A polarization state of the laser beam may be maintained from an input through an output. Each grating stage may include a thickness selected to achromatize the laser beam through the grating stages.

Abstract: A viewing angle controlling film, a backlight unit using the same, and a display device using the same are disclosed. The viewing angle controlling film comprises a first area where light transmittance is not converted; and a second area where light transmittance is converted, wherein the second area includes a light-transmittance conversion portion configured to react with light of a predetermined wavelength range to convert the light transmittance and not to react with light of a wavelength range other than the predetermined wavelength range.

Abstract: Disclosed is a method for manufacturing a flat liquid crystal display device film. According to the method for manufacturing the flat liquid crystal display device film, influence of a wiring thickness on topography of array film can be reduced. Without affecting a qualified rate of a product, a low-resistance wiring can be realized, and thus an RC delay during signal transmission of a large-sized panel can be reduced. Meanwhile, when the method is applied, a metal layer with a larger thickness relative to that of a metal layer made by a conventional method can be made. Therefore, wiring load of a large-sized panel can be reduced, resistance of signal line can be reduced. RC delay can be decreased, and display quality can be improved.

Abstract: In one embodiment, a display device comprises a dimming and display panels and an illumination device. The dimming panel includes first and second substrates and a first liquid crystal layer. The display panel includes third and fourth substrates and a second liquid crystal layer. The illumination device irradiates the dimming panel or the display panel with light. In the display device, at least one of the first, second, third and fourth substrates is a rigid substrate, and at least one of the first, second, third and fourth substrates is a flexible substrate.

Abstract: The present invention provides an alignment method of an FFS liquid crystal display panel. The method includes adding a light-sensitive small-molecule compound in a rubbing alignment material, carrying out rubbing alignment after formation of an alignment film, and afterwards, conducting boxing of the FFS liquid crystal display panel, and then applying an electrical voltage to cause liquid crystal molecules to rotate to a position substantially parallel to a substrate, and carrying out UV irradiation to cause polymerization of the light-sensitive small-molecule compound to form polymer bumps so as to keep the liquid crystal molecules in parallel to the substrate. The liquid crystal molecules, after the alignment, show a pre-tilt angle having a zero angle value and can, under the condition of providing a strong anchoring force of the alignment film, reduce the pre-tilt angle of the liquid crystal molecules and improve quality of displaying of the FFS liquid crystal display panel.

Abstract: The disclosure provides a liquid crystal display panel, an array substrate and a manufacturing method thereof. In the method, controllable resistance spacer layers are formed on at least one of a source doped region and a drain doped region of a low temperature polysilicon active layer. When a turn-on signal is not applied to the gate layer, the controllable resistance spacer layers serve as a blocking action for a flowing current; and when the turn-on signal is applied to the gate layer, the controllable resistance spacer layers serve as a conducting action for the flowing current, such that contact regions formed of the controllable resistance spacer layers are respectively connected with the corresponding source layer and the corresponding drain through the controllable resistance spacer layers. Therefore, the disclosure is capable of effectively decreasing a leakage of a thin film transistor.

Abstract: According to one embodiment, a first substrate includes a pixel electrode, a common electrode and a sub-pixel area including a first area and a second area. The first area includes an area where the pixel electrode exists, an axial area extending in a second direction, and branch areas extending from the axial area to a first side of the first direction. The second area includes an area where the pixel electrode does not exist, and a first gap area extending in the first direction, at a position between the adjacent branch areas. A maximum value of a first voltage applied to the pixel electrode in a first mode is higher than a maximum value of a second voltage applied to the pixel electrode in a second mode.

Abstract: A display device may include a substrate, a plurality of gate lines and a plurality of data lines, gate wirings and data wirings. The substrate may comprise a display area in which a plurality of pixels for displaying an image are arranged and a non-display area around the display area. The plurality of gate lines and the plurality of data lines in the display area on the substrate, the plurality of gate lines extending in one direction and the plurality of data lines extending in a direction intersecting said one direction. The gate wirings and data wirings in the non-display area on the substrate. At least one of the gate wirings and the data wirings has a hole having an edge in the form of numbers.

Abstract: The display device includes: a substrate; a thin-film transistor disposed on the substrate; a passivation layer covering the thin-film transistor; a capping layer disposed on the passivation layer; and a pixel electrode disposed on the capping layer and connected to the thin-film transistor, wherein a thickness of the capping layer is determined according to: d1=(?/2)×(1/2n), where d1 denotes the thickness of the capping layer, ? denotes a wavelength within visible wavelength range, and n denotes a ratio of refractive indices of the passivation layer to the capping layer.

Abstract: A semiconductor device includes: a first metal layer including a gate electrode; a first insulating layer provided on the first metal layer; an oxide semiconductor layer provided on the first insulating layer; a second insulating layer provided on the oxide semiconductor layer; a second metal layer provided on the oxide semiconductor layer and the second insulating layer, the second metal layer including a source electrode; a third insulating layer provided on the second metal layer; and a first transparent electrode layer provided on the third insulating layer. The oxide semiconductor layer includes a first portion lying above the gate electrode and a second portion extending from the first portion so as to lie across an edge of the gate electrode on the drain electrode side. The third insulating layer does not include an organic insulating layer.

Abstract: A projector includes a beam homogenizer receiving light from a light source and creating a predetermined illumination, and a spatial light modulator including grating stages to receive the predetermined illumination. Each grating stage may include a plurality of pixels where corresponding pixels in the grating stages are aligned with one another. Each of the pixels may include a liquid crystal layer disposed between two substrates, where a pixel is switchable by applying a voltage thereto, with a grating period of the pixel selected such that, when the voltage is applied to the pixel and light is passed therethrough, optical energy from the light in plus and minus first orders is deflected toward sides of the pixel and optical energy from a zero order of the light is allowed to pass through the pixel, with a polarization state of the light maintained through the pixel.

Abstract: The embodiments of the present disclosure provide a display panel, a method for fabricating the same and a display device. The display panel comprises: a first substrate; a second substrate disposed opposite to the first substrate; and a plurality of pillow spacers disposed between the first substrate and the second substrate and supporting the first substrate and the second substrate, wherein the pillow spacer including a pillow having a first varying height on one side of the first substrate facing the second substrate and a spacer on one side of the second substrate facing the first substrate, the spacer having a second varying height that varies depending on a change of the first varying height such that each pillow spacer has a constant height.

Abstract: A liquid crystal display panel and a display device are disclosed. The liquid crystal display panel includes an array substrate and an upper substrate arranged opposite to each other, and a liquid crystal layer, a spacer layer including primary spacers and secondary spacers, and a black matrix layer over the spacer layer. The overlapping area between one of the plurality of black matrix elements and a green sub-pixel near one of the plurality of primary spacers below said matrix element forms a first overlap area, wherein an overlapping area between one of the plurality of black matrix elements and a green sub-pixel near one of the plurality of secondary spacers below said matrix element forms a second overlap area; and the first overlap area equals the second overlap area.

Abstract: A display device includes: a display panel which displays an image with light; a cover window disposed on the display panel to form an outer display surface of the display device; a housing into which and out from the display panel and the cover window are together moved; and within the housing: a winding roller around which the display panel is wound and unwound within the housing, a first end of the display panel being connected to the winding roller; and a sliding guide along which the cover window slides to be bent within the housing, the sliding guide disposed outside the winding roller.

Abstract: A display device includes a first flexible substrate on which a display region and a peripheral region located along a periphery of the display region are arranged; a connection terminal provided in the peripheral region, the connection terminal being connected with an integrated circuit; and a first insulating film in contact with the first flexible substrate. The first insulating film is present in the display region, and the first insulating film is not present between the connection terminal and the first flexible substrate.

Abstract: The present disclosure relates to the technical field of fixation of light guide plates, and in particular discloses an elastic fixing member for fixing a light guide plate, a backplane for use in conjunction therewith, and a liquid crystal display device comprising both. The elastic fixing member comprises: a body part and a self-fixation part, wherein the self-fixation part is configured to fix the elastic fixing member on a backplane in use. Correspondingly, the backplane comprises: a base and a side wall. Furthermore, a fixing structure and a mounting guide structure are arranged on the side wall of the backplane. The fixing structure is configured to maintain the fixation of the elastic fixing member on the backplane together with the self-fixation part of the elastic fixing member in use, and the mounting guide structure is configured to guide the elastic fixing member in use to fix it on the backplane.

Abstract: The present invention provides a method for manufacturing an organic functional layer in a display panel by adhering an organic material pattern corresponding to the transfer protrusions from an organic material layer by using the transfer protrusion on a transfer head, then, the organic material pattern which is adhered by the transfer head is disposed on a receiving substrate, so as to form a patterned organic functional layer on the receiving substrate. The present invention provides a patterned organic functional layer in a display panel by a micro transfer print technology, which is capable of effectively reducing the material consumption of the organic functional layer and the production method is simple, which is capable of effectively reducing the online production cycle.

Abstract: An optical filter for a display includes a filter film with at least one optical filter layer. The filter layer blocks a band of optical wavelengths and is transparent for optical wavelengths outside the band. The filter film has a thickness within the range of 25 microns through 1 mm. The filter film may include one or more laminate layers that are optically transparent in the wavelengths of the band blocked by the filter layer. The filter film may include one or more layers of liquid crystal polymers in layered contact with one or more transparent electrode layers and one or more layers of polymers in layered contact with the one or more layers of liquid crystal polymers.

Abstract: A display device includes a first pixel region (FPR), a second pixel region (SPR), a color conversion pattern (CCP), a first overcoat layer (FOL), a barrier layer (BL), a second overcoat layer (SOL), a liquid crystal layer (LCL), and a switching element (SE). The FPR is configured to display a first color (FC). The SPR is adjacent the FPR, and is configured to display a second color (SC) of a shorter peak wavelength than the FC. The CCP is disposed in the FPR, and is configured to: convert a color of incident light into the FC; and output converted light of the FC. The FOL is disposed on the CCP. The BL is of an inorganic material, and is disposed on the FOL. The SOL is of an organic material, and is disposed on the BL. The LCL is disposed on the SOL. The SE is disposed on the LCL.

Abstract: A display panel including a first substrate including a pixel electrode, a second substrate, a third substrate, a liquid crystal layer between the first substrate and the second substrate, and a color filter. The first substrate is located between the liquid crystal layer and the color filter. The first substrate includes a first resin base, or the second substrate includes a second resin base. A display panel may include a first polarizer plate. The third substrate may be located between the first substrate and the first polarizer plate.

Abstract: Disclosed is a transparent liquid crystal display panel which includes an upper substrate and a lower substrate. The upper substrate includes a pixel structure and an upper polarizing structure from bottom to top, and the lower substrate includes a lower polarizing structure. The pixel structure includes an active area and a transparent area. A direction of a grating bar of the upper polarizing structure corresponding to the active area is perpendicular to a direction of grating bars of the lower polarizing structure, and a direction of a grating bar of the upper polarizing structure corresponding to the transparent area is parallel to the direction of the grating bars of the lower polarizing structure. The display panel has advantages that the transmittance of the transparent liquid crystal display device is adjustable, the number of control points of a pixel signal voltage is reduced, and the complexity of a manufacture process is reduced.

Abstract: A backlight unit and a display apparatus including the same are disclosed. The backlight unit includes a support member being concave rearward so as to define an interior space, the support member including a central portion defining a central area of a rear surface of the interior space and a side portion extending outward from a peripheral edge of the central portion while being inclined forward, a plurality of light sources disposed on the central portion so as to radiate light, a plurality of lenses respectively disposed on the plurality of light sources so as to disperse light from the light sources, a reflective sheet covering front surfaces of the central portion and the side portion, and a plurality of scattering members disposed on corner portions of the reflective sheet and protruding from the reflective sheet. The display apparatus includes the backlight unit and a display panel disposed in front of the backlight unit.

Abstract: A light-emitting apparatus includes: a light-source unit configured to emit light of a first color; a sheet member containing a conversion member configured to emit light of the first color and light of a second color, according to incidence of the light emitted from the light-source unit; a bottom-surface member; a side-surface member; and an upper-surface member, wherein the sheet member emits the light of the second color by a light amount corresponding to a length of a path where the incident light of the first color passes through the sheet member, a space including the light-source unit and the conversion member is formed by the bottom-surface member, the side-surface member, and the upper-surface member, and a first opening connecting an inside and an outside of the space is provided at a position, on the upper-surface member, which does not face the light-source unit.

Abstract: A light-emitting device includes: a base having an upper surface; a plurality of light sources located on the upper surface of the base; a first lenticular lens sheet disposed to face the base with the light sources between the first lenticular lens sheet and the base, the first lenticular lens sheet including a first plurality of grooves; a half mirror located on an upper surface side of the first lenticular lens sheet; and a second lenticular lens sheet disposed on an upper surface side of the half mirror, wherein the second lenticular lens sheet includes a second plurality of grooves extending in a direction that intersects a direction in which the first plurality of grooves of the first lenticular lens sheet extend.

Abstract: A display substrate (100) is provided for a display device. The display substrate (100) includes a display region with an alignment film formed on one side of the display region. A non-display region at a peripheral area of the substrate and adjacent to the display region. An uneven layer (1) formed on the non-display region at a same side as the alignment film. A first film layer (2) formed on the uneven layer (1) and covering the uneven layer (1) to form a substantially flat surface of the non-display region with respect to the display region.

Abstract: Disclosed are a light irradiation device, a liquid crystal alignment method, and an apparatus. The light irradiation device includes one or a plurality of light boxes, each of which is provided therein with a plurality of light-emitting members and is configured to emit light from inside to outside thereof through the light-emitting members. Light-emitting surfaces of the light boxes are in a same plane. The light-emitting members are light emitting diodes which emit ultraviolet light used for liquid crystal alignment. Therefore, an auxiliary device is no longer needed to block out unnecessary light, thereby reducing costs. In addition, the ultraviolet light will not damage a liquid crystal structure and thus quality of a liquid crystal panel is improved. By using light-emitting diodes, energy consumption can be reduced and frequent replacement of lamp tubes can be avoided, thereby improving productivity.