Abstract: A backlight unit, being thin-sized, but having high definition and high uniformity of luminance, and a video display apparatus applying the same therein, has a plural number of sets of at least one or more of light source(s) (1) and a light guidance plate (2) for guiding lights from the light source(s) to a side of a liquid crystal panel, to be emitted therefrom, wherein the light source(s) is/are disposed on one end side of the light guidance plate, and other set of light source is disposed on a rear surface side of the other end of the light guidance plate opposite to the one end.

Abstract: A backlight unit having a LED light source includes a light guide plate partitioned in areas each having a tapered shape formed of a thick portion and a thin portion. The light guide plate is formed such that a thick portion and a thin portion are repeated at certain intervals, and the repeated thick portions and the repeated thin portions gradually decrease in thickness. The LED light source is attached to a lateral side of each thick portion. Grooves are formed in the light irradiation direction of the LED light source and in a direction perpendicularly intersecting the light irradiation direction. Each of the grooves is formed in an concave shape (V-shape or trapezoid-shape). There is a relation 0.2/30<=W/D<0.1 where D denotes the distance between the light guide plate and a light diffusion plate, and W denotes the width of each of the grooves. An inclination angle ? relative to the center of each of the grooves is between 9 and 15 degrees inclusive.

Abstract: A liquid crystal module includes a rear frame, a light reflecting sheet, a plurality of U-shaped cold cathode tubes, an optical sheet and a liquid crystal panel. The light reflecting sheet is disposed on the rear frame. The U-shaped cold cathode tubes are disposed above the light reflecting sheet and arranged parallel to each other. Each of the U-shaped cold cathode tubes includes a U-shaped bent part and a pair of end portions extending from the U-shaped bent part. Widths of the U-shaped bent parts of the U-shaped cold cathode tubes are different from each other. Overall lengths of the U-shaped cold cathode tubes from one end portions to the other end portions along the U-shaped cold cathode tubes are equal to each other. The optical sheet is disposed above the U-shaped cold cathode tube. The liquid crystal panel is disposed above the optical sheet.

Abstract: A liquid crystal display (LCD) device including upper and lower substrates facing each other with a liquid crystal layer interposed therebetween, upper and lower polarization plates positioned on outer surfaces of the upper and lower substrates, respectively, and a beam steering film positioned on the upper polarization plate and including a plurality of curved-lenses formed on a surface of the beam steering film facing the upper polarization plate.

Abstract: A direct light type backlight unit and a color filterless liquid crystal display (LCD) apparatus employing the same are provided. The direct light type backlight unit includes: a substrate; a plurality of light-emitting devices inclined with respect to the substrate; a diffraction grating which diffracts light emitted by the plurality of light-emitting devices at different angles according to wavelength and thereby separates the light into a plurality of color beams; and a plurality of reflectors, each reflector disposed at a side of one of the plurality of light-emitting devices, which reduces the range of angles of light incident on the diffraction grating.

Abstract: A multifunctional optical sheet for a liquid crystal display device includes a substrate diffusing incident light; a light-concentrating layer on the substrate and including a plurality of patterns that arranged to form alternating peaks and valleys; and reflection patterns between the substrate and the light-concentrating layer corresponding to the valleys of the light concentrating layer.

Abstract: A surface light source includes a light source which selectively irradiates two polarized light beams in polarized states different from each other, a light guide plate which includes a transparent plate having two plate surfaces facing each other and end faces surrounding the plate surfaces, and irradiates the two polarized light beams form an irradiation surface, and an optical element which irradiates irradiated light from the irradiation surface of the light guide plate toward a direction substantially normal to the light guide plate upon changing the propagation direction of the irradiated light. A liquid crystal display apparatus includes this surface light source, a polarization control element which is placed on the observation side of the surface light source and rotates the polarization plane of linearly polarized light transmitted through one of partitioned first and second areas through a predetermined angle, and a liquid crystal display device placed on the observation side.

Abstract: A planar light source includes a backlight that emits light in a planar shape, a ray direction regulating element that regulates a direction of light made incident from the backlight and emits the light, whereby a directivity of the light is improved, and in which a transparent area for transmitting light and an absorption area for absorbing light are formed, and a transparent and scattering switching element that is switchable between a state in which light which is transmitted by the ray direction regulating element and made incident on the switching element is transmitted and a state in which the light is scattered. The transparent areas are formed in a shape of a matrix including a plurality of rows and a plurality of columns, the transparent and absorption areas are formed alternately, and the absorption area is formed so that the transparent areas are separated.

Abstract: An optical assembly includes a light diffusing layer attached to a reflective polarizing layer. An intermediate region between the light diffusing layer and the reflective polarizing layer includes an intermediate structure that defines voids between the light diffusing layer and the reflective polarizing layer.

Abstract: A dual liquid crystal display (LCD) device including a first LCD panel displaying an image on a first surface; a second LCD panel formed on the same substrate to display an image on a second surface; a light source disposed at an adjacent side under the first LCD panel; a light guide disposed under the first and second LCD panels and including a first light guide block corresponding to the first LCD panel and having dot patterns formed in a first surface and a second light guide block corresponding to the second LCD panel and having taper-cascade grooves formed on a first surface; and a housing settling the first and second LCD panels, the light source and the light guide and having an opening to correspond to an image display surface of the second LCD panel.

Abstract: A backlight device includes projections disposed on the back side of a light guide plate, and engagement holes engaging with the projections formed in a housing. The projections of the light guide plate are engaged with the engagement holes in the housing to prevent displacement of the light guide plate caused by vibration and impact. One surface of each projection is flush with a light incident surface, the area of that cross-section of each projection which is parallel or substantially parallel to the light incident surface is set such that it continuously decreases as the section is farther away from the light incident surface, and as a result, occurrence of a bright line and a dark line is prevented.

Abstract: In general, an illumination display includes a light transmitting panel that provides enhanced illumination edge lighting. One or more light sources are optically coupled into an edge of the light transmitting panel to illuminate the light transmitting panel. The light transmitting panel refracts and reflects light such that a greater intensity of light may be emitted from one or more enhanced illumination portions, such as a raised enhanced illumination portion, of the light transmitting panel. The light source(s) may emit light of different colors corresponding to different conditions such that the illumination display indicates a condition by illuminating with the color corresponding to the condition. The illumination display may be used in various devices including, but not limited to, a device for checking the temperature of food.

Abstract: Disclosed is a light guide plate, comprising a light guide plate body and a plurality of micro mirrors formed on an upper surface of the light guide plate body for controlling a reflection direction of light incident on the light guide plate. The amount of light output from a backlight module using the light guide plate can be controlled by adjusting an angle of each of the micro mirrors with respect to an incident light from a light source.

Abstract: A backlight (5) for a 3D display device, the backlight (5) comprising a planar light guide (7) through which light is guided transversely by internal reflection. The light guide (7) is provided with a plurality of grooves (8), which are configured to direct light propagating within the light guide (7), out of a face (7f) of the light guide (7) so as to form a plurality of line light sources.

Abstract: This invention provides a liquid crystal display device capable of allowing the color saturation of light reflected from a transflective type or a reflective type liquid crystal display device to be constant. In addition, According to the invention, the color filter is adjusted according to the distribution of the colors included in the light source such that the color saturation of images displayed in the reflective mode is constant. As a result, the images are clearly exhibited in the liquid crystal display device, and resolution of the color increases.

Abstract: A liquid crystal panel assembly includes a liquid crystal panel, a backlight module having at least one light emitting diode (LED) light source to irradiate light to the liquid crystal panel, and a housing which surrounds the liquid crystal panel and the backlight module. At least a portion of the housing adjacent to the at least one LED light source is formed of a thermal-conductive material.

Abstract: A backlight unit to effectively prevent generation of double images, having a frame, a plurality sets of light sources, at least one isolator and one diffuser. The light source sets are located within the frame and are individually driven periodically. The isolator is disposed at the bottom of the frame between adjacent light source sets. The diffuser is located on top of the frame over the light source sets and the isolator with a height larger than or equal to half the distance between the diffuser and the bottom of the frame.

Abstract: A lighting device for emitting light in a planar manner comprises a backlight section having non-uniformity in light emission in a plane and an optical film having an in-plane transmittance distribution compensating for the non-uniformity in light emission. The optical film has a plurality of slits allowing light to pass through and controls the in-plane transmittance distribution by varying the shapes of slit openings. Widths of the slits are fixed, closed portions are provided in a longitudinal direction, and the in-plane transmittance distribution is controlled by the ratio of the closed portions to the slits. A part of the optical film other than the slits is a light shielding layer, and a surface on the light source side of the light shielding layer scatters and reflects light. Each value in the in-plane transmittance distribution of the optical film is smaller than the reciprocal of a corresponding value in a light intensity distribution of the backlight section.

Abstract: Backlight support is provided for flat panel displays through use of phospho-luminescent materials. Photo-luminescent materials are integrated into a flat panel display such as an LCD display as a back panel substrate or by embedding in display pixels. When ambient light levels exceed a predetermined threshold the material is activated allowing a reduction in active backlight power. The active backlight may be provided by an electrically supported system such as an ELP, a light pipe, an LED, etc. By reducing the power of the active backlight in an analog manner or through decreasing the duty cycle, an overall power savings is accomplished for the display. By embedding different photo-luminescent materials that operate at different wavelengths, color display may be enhanced while reducing power consumption. Display properties, such as transparency, contrast, etc., may be adjusted to affect phospho-luminescent backlight support.

Abstract: A backlight apparatus includes a point source of radiant electromagnetic energy. A total internal reflection (TIR) lens has a vertical central axis located along a path of the radiant electromagnetic energy. The TIR lens receives and evenly distributes the radiant electromagnetic energy at an output face. The radiant electromagnetic energy exiting the TIR lens is substantially collimated and defines vertical optical paths parallel to the vertical central axis. A first diffuser receives the radiant electromagnetic energy from the output face of the TIR lens and spreads the radiant electromagnetic energy to a predetermined first angle relative to the vertical optical paths.

Abstract: A cyan-colored composition for a color filter contains a phthalocyanine blue pigment comprising either of C.I. Pigment Blue 15:3 and C.I. Pigment Blue 15:4, or both, a phthalocyanine green pigment comprising C.I. Pigment Green 7, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof. A color filter includes a red-colored filter segment, a green-colored filter segment, a blue-colored filter segment, and a cyan-colored filter segment or a yellow-colored filter segment.

Abstract: A display device includes a substrate, a pixel electrode formed on the substrate and allowing light to be transmitted therethrough, a micro-shutter electrode formed on the pixel electrode to be opened and closed, and a reflection preventing layer formed on an upper surface of the micro-shutter electrode. Because the reflection preventing layer is formed on the upper surface of the micro-shutter electrode to prevent light incident thereon from being reflected to be leaked out, the black color does not dim the display, thereby increasing the contrast ratio (CR), and sharpness is not degraded when displaying colors.

Abstract: A transaction card system includes a transaction cared with a display tag for displaying short term information, the character display having optical states that are stable without power and viewable from one side of the display tag and an array of electrical contacts for electrically addressing the character display from the other side of the tag, a contact window through which the contacts are accessible, machine readable data on the card, and long term information printed on the transaction card; a transaction card writer having a reader for reading the machine readable data and having means for updating the short term information displayed on the transaction card; and a central computer connected to the transaction card writer having a data base and a central processor for receiving the information read by the magnetic card reader and generating display commands for the transaction card writer.

Abstract: A backlight module (1) includes a light source (121), a light guide plate (122) and a grating plate (123). The light guide plate includes a light incident surface (1221), a bottom surface (1223) adjacent the light incident surface. The light source is provided adjacent to the light incident surface of the light guide plate. The grating plate is provided adjacent to the bottom surface of the light guide plate. The grating plate is configured for reflecting light beams and polarizing the light beams.

Abstract: A planar light source includes a large variable width of an irradiation angle of illumination light, a display device having a large variable width of an angle of field that uses the planar light source, a portable terminal device that uses the display device, and a ray direction switching element that is incorporated in the planar light source. A beam direction regulating element (a louver), which controls a direction of light, and a transparent and scattering switching element, which can switch the transparent state and the scattering state according to ON and OFF of an applied voltage, are provided between a backlight and a liquid crystal panel, whereby it is possible to increase a variable width of an irradiation angle of light in the planar light source and increase a variable width of an angle of field of the liquid crystal display device that uses the planar light source.

Abstract: A backlight unit includes a light guide plate having opposite side surfaces and a peripheral edge surface. A part of the peripheral edge surface is a light entrance surface, and one of the opposite side surfaces is a light exit surface. A light source is disposed adjacent to the light entrance surface of the light guide plate. A light deflecting film is disposed adjacent and parallel to the light exit surface of the light guide plate. The light deflecting film has a multilayer construction wherein light reflecting layers and light transmitting layers are stacked one by one alternately. The light reflecting and transmitting layers are tilted at a predetermined angle to the light exit surface.

Abstract: An illumination system for a flat panel display device includes: a light guide plate made of an optically isotropic material; a light source disposed at a side of the light guide plate; an upper layer disposed on a top surface of the light guide plate and made of an optically anisotropic material; and a polarization selection emitting structure which is disposed at an interface of the light guide plate and the upper layer. The upper layer has two different refractive indices and one of the two refractive indices is the same as a refractive index of the light guide plate. In the polarization selection emitting structure differently polarized light is differently refracted, reflected, diffracted, or scattered based on polarization direction.

Abstract: A light-emitting unit includes a bounding frame, a first light-emitting element, a second light-emitting element, and a first reflecting sheet. The first light-emitting element and the second light-emitting element are disposed in the bounding frame, and emit light in different directions. The first reflecting sheet is disposed on the bounding frame, and has a reflecting surface on one side away from the bounding frame.

Abstract: A backlight unit of a liquid crystal display device includes a mold frame having a receiving space for receiving a reflection sheet, a prism sheet a diffusion sheet, a plurality of light-emitting diodes, and a shielding tape for affixing the reflection sheet, the prism sheet, the plurality of light-emitting diodes and the diffusion sheet within the receiving space, wherein a first color is colored at a plurality of first colored areas at a lower surface of the shielding tape corresponding to the plurality of light-emitting diodes and a second color is colored at a remaining area of the lower surface of the shielding tape other than the plurality of first colored areas.

Abstract: A backlight unit 1 includes a plurality of light emitting devices 2 constituted with, for example, LED lamps, and an optical sheet 4 disposed on light emission surface 2b sides of the light emitting devices 2. The light emission surface sides of the plural light emitting devices are joined to the optical sheet 4 via joining layers 5. The backlight unit 1 satisfies a condition of n1?n2?n3, where n1 is a refractive index of the optical sheet 4, n2 is a refractive index of the joining layer 5, and n3 is a refractive index of the light emitting device 2.

Abstract: A backlight unit and an LCD employing the backlight unit are provided. The backlight unit includes: a base substrate; a plurality of point light sources arranged in two or more lines on the base substrate; a diffusion plate disposed over the plurality of point light sources to diffuse and transmit incident light; and at least one barrier rib forming two or more division areas by being disposed between the base substrate and the diffusion plate to be upright with respect to the base substrate between the lines and having a wall surface reflecting light incident from the plurality of point light sources, at least a portion of an end portion of the barrier rib being inserted into the diffusion plate.

Abstract: A planar light source includes a large variable width of an irradiation angle of illumination light, a display device having a large variable width of an angle of field that uses the planar light source, a portable terminal device that uses the display device, and a ray direction switching element that is incorporated in the planar light source. A beam direction regulating element (a louver), which controls a direction of light, and a transparent and scattering switching element, which can switch the transparent state and the scattering state according to ON and OFF of an applied voltage, are provided between a backlight and a liquid crystal panel, whereby it is possible to increase a variable width of an irradiation angle of light in the planar light source and increase a variable width of an angle of field of the liquid crystal display device that uses the planar light source.

Abstract: A display includes a display panel and a backlighting system having a light source and waveguide. The waveguide includes diffusing portions of diffusing material. Light propagates through the waveguide by total internal reflection, but may be scattered by the diffusing portions. Scattered light leaving the waveguide through its exit face produces a pattern of light lines for use in illuminating a 3D autostereoscopic image displayed by the display panel. Intervening portions between the diffusing portions, are formed from a material that can be switched between a light transmissive state and a diffusive state. Optical properties of the intervening portions are controlled using electric fields. Such a display is switchable between a 2D image mode, in which the intervening portions are diffusive and the waveguide provides uniform illumination, and a 3D image mode, in which the intervening portions are transmissive and the waveguide provides illumination in the form of light lines.

Abstract: A flat screen comprises a liquid-crystal element, such as an LCD element, for representing an image. Further, a plurality of point light sources, such as LEDs, are provided. Between the point light sources and the liquid-crystal element a light-guiding element is arranged. For rendering the brightness distribution more uniform, the light-guiding element comprises at a surface thereof a plurality of diffractive surface elements arranged in cells.

Abstract: A luminance control apparatus of a liquid crystal display device (LCD) is presented. The LCD includes a liquid crystal display panel divided into areas, lamps, an arithmetic unit, and a lamp driver. Fewer lamps are present than the number of areas. The arithmetic unit scans pixels of each area, extracts a peak value of the gray level of pixels of the area, and calculates a maximum peak brightness value and an average value of the area. The lamp driver controls the brightness of the lamps in accordance with the average value and the maximum peak brightness value.

Abstract: Optical devices for guiding illumination are provided each having a body of optical material with staircase or acutely angled ramp structures on its top surface for distributing light inputted from one end of the device from the front exit faces of such structures along certain angular orientations, while at least a substantial portion of the light is totally internally reflected within the body until distributed from such front exit faces. Optical devices are also provided each have a body of optical material having a bottom surface with acutely angled ramp structures and falling structures which alternate with each other, such that light is totally internally reflected within the device until reflected by such ramp structures along the bottom surface to exit the top surface of the device or transmitted through the ramp structures to an adjacent falling structure back into the device.

Abstract: A planar light source unit includes a metal frame retaining a light source panel provided with an light guide for inducing emission of light from a light source and a plastic frame that supports at least part of a peripheral edge of the light guide. The outer peripheral surface of the plastic frame with a fitting structure between the metal frame and the plastic frame and an outer frame portion contiguous to the support plate portion and sandwiched between the fixing means and the outer frame portion of the metal frame. A liquid crystal display panel is provided with a display region in which plural display pixels are arrayed and the planar light source unit.

Abstract: A liquid crystal display device is provided. The LCD device includes a top case, an inverter and a bracket. The top case surrounds a periphery of a liquid crystal display panel which displays a picture. The inverter supplies a high voltage AC power to a lamp which projects a light to the liquid crystal display panel. The bracket fastens to the top case and includes at least two fastening parts for insertion of opposite ends of the inverter, thereby reducing fabrication times for devices implementing the present invention and improving productivity.

Abstract: A structure of a backlight module, which includes: a light source frame, including: a top plate having a plurality of slits; a bottom plate arranged apart from the top plate; and at least two edge plates arranged oppositely, wherein each of the edge plates has a top end and a bottom end, and both of the bottom ends are separately connected with the bottom plate; wherein the inner surfaces of the top plate, the bottom plate and the edge plates form a reflective cavity; and at least one light source arranged in the reflective cavity. There are several advantages of the backlight module according to the present invention, which includes: 1. the required uniformity and brightness of the backlight module are achieved; 2. its weight is largely reduced; and 3. it can be tiled up to form a large-area backlight module for a large size display.

Abstract: A polarized light conversion apparatus comprises a polarization device, a light source, a reflection device and a phase changing device. The polarization device includes a light-transmissible body and a polarization film. The light-transmissible body includes an incidence surface. The incidence surface includes a first part and a second part. The first part intersects the second part at an angle. The polarization film is disposed on the incidence surface. The light source is disposed in one side of a bisector of the angle between the first part and the second part and corresponding to the incidence surface. The reflection device includes a reflection surface. The reflection surface is disposed corresponding to the incidence surface and in the other side of the bisector of the angle. The reflection surface is perpendicular to the bisector of the angle. The phase changing device is disposed between the polarization device and the reflection device.

Abstract: A liquid crystal display module includes a backlight assembly having a lamp, a lamp housing surrounding the lamp and having an open portion along a first side, a light guide plate disposed adjacent to the open portion of the lamp housing, and a plurality of optical sheets disposed on the light guide plate, edge portions of the plurality of optical sheets are disposed spaced apart from the light guide plate by interposing a top portion of the lamp housing between a periphery of the light guide plate and the edge portions of the plurality of optical sheet, a liquid crystal panel disposed over the plurality of optical sheets, a main support disposed over the lamp housing and accommodating the liquid crystal panel, a top case surrounding edge portions of the liquid crystal panel, and a bottom case supporting and accommodating the backlight assembly.

Abstract: A planar light source includes a large variable width of an irradiation angle of illumination light, a display device having a large variable width of an angle of field that uses the planar light source, a portable terminal device that uses the display device, and a ray direction switching element that is incorporated in the planar light source. A beam direction regulating element (a louver), which controls a direction of light, and a transparent and scattering switching element, which can switch the transparent state and the scattering state according to ON and OFF of an applied voltage, are provided between a backlight and a liquid crystal panel, whereby it is possible to increase a variable width of an irradiation angle of light in the planar light source and increase a variable width of an angle of field of the liquid crystal display device that uses the planar light source.

Abstract: A polarizer includes a first prism plate having a plurality of first micro-prisms; a polarizing film formed on surfaces of the first micro-prisms; and a second prism plate having a plurality of second micro-prisms, the micro-prisms of the first prism plate and the micro-prisms of the second prism plate meshed with each other and integrated the polarizing film therebetween, the polarizing film being in direct contact with the first prism plate and the second prism plate. Furthermore, a method for manufacturing the polarizer and a backlight module using the polarizer is also provided.

Abstract: A light-guide board includes a light guide plate made out of an optically transmissive material and having a transparent layer and a back reflecting layer formed integral with the back side of the transparent layer, and a plurality of reflecting baffles respectively extending from the back reflecting layer and embedded in the transparent layer for reflecting light to enhance the intensity of light and the uniformity in light intensity.

Abstract: A viewing-angle adjustable liquid crystal display includes a display panel, a backlight unit, and a sidelight unit. The backlight unit is located under the sidelight unit, and the sidelight unit is disposed under the display panel. The sidelight unit includes a first sidelight source and a light-guide plate. The first sidelight source is disposed at one end of the light-guide plate. The displaying method includes providing direct light to the display panel in response to the narrow-viewing-angle-mode signal; and providing scattering light to the display panel in response to the wide-viewing-angel-mode signal.

Abstract: To provide a flat lighting device used for a liquid crystal display device and the like that can be made thin and lightweight and produced at low cost, the lighting device of the present invention includes a plurality of surface light emitting plates which are two-dimensionally arranged. Each of the plurality of surface light emitting plates includes a light guide portion and a light source portion provided in an end portion of the light guide portion. The light guide portion and the light source portion are integrally provided. The light source portion of a surface light emitting plate two-dimensionally overlaps with the light guide portion of another surface light emitting plate adjacent thereto, so light having a uniform intensity can be emitted above the plurality of surface light emitting plates.

Abstract: One embodiment of the present invention is an optical sheet including a lens sheet having a plurality of microlenses arranged on a front surface thereof and a plurality of projections located at a back side thereof, a projection being located between light transmission parts, and a part corresponding to the microlens being the light transmission part; and a plurality of light reflection layers provided on top of the plurality of projections. A light refracted by the side surface of the projection exits in an oblique direction towards a plane of the optical sheet. Thereby, the view angle can be broadened.

Abstract: In a particular embodiment, the louver device includes a transparent layer of material having a first surface and, parallel thereto, a second surface. A plurality of shaped louver members are disposed within the transparent layer of material. The shaped louver members are aligned to receive light entering the first surface at a first angle relative to the first surface and direct the light out the second surface at a plurality of angles relative to the second surface.

Abstract: A backlight module (1) includes a light source (121), a light guide plate (122) and a grating plate (123). The light guide plate includes a light incident surface (1221), a bottom surface (1223) adjacent the light incident surface. The light source is provided adjacent to the light incident surface of the light guide plate. The grating plate is provided adjacent to the bottom surface of the light guide plate. The grating plate is configured for reflecting light beams and polarizing the light beams.

Abstract: A light source is provided including, a backlight that emits light in a planar shape, a ray direction regulating element that regulates a direction of light made incident from the backlight and emits the light and in which a transparent area for transmitting light and an absorption area for absorbing light are formed alternately in a direction perpendicular to a light regulating direction thereof, and a transparent and scattering switching element that is capable of switching a state in which light made incident from the ray direction regulating element is transmitted and a state in which the light is scattered.