Abstract: A lighting device 12 of the present invention includes a plurality of light sources 17 and an optical member arranged closer to the light-exiting portion 15z than the light sources 17. The optical member 15 includes a prism diffuser plate 15a for diffusing light emitted from the light sources 17 and exiting from a lens sheet 15c arranged closer to the light-exiting portion 15z than the prism diffuser plate 15a. The prism diffuser plate 15a has prisms on a surface located on a side closer to the light-exiting portion 15z. The lens sheet 15c has convex lenses 62 on a surface closer to the light-exiting portion 15z.

Abstract: A composite diffuser structure includes a transparent layer having a light-entering surface and a light-emitting surface, a lenticular structure having a plurality of lenticular lens formed on the light-emitting surface, and a plurality of refection structures located on the light-entering surface. Each of the lenticular lenses has a first width. There is an opening between two adjacent reflection structures. Each of the openings has a second width. Thereby, the light beam enters into the transparent layer via the opening to increase the light efficiency. By using the diffuser layer located above the lenticular structure, the view angle can be adjusted.

Abstract: A liquid crystal display device includes an input and output display unit which includes a touch panel function; a backlight which emits light to the input and output display unit from a rear surface thereof; a comparison processing unit which compares a sensor output of a sensor which detects the light emitted from the backlight and reflected from a manipulation object on the input and output display unit with a predetermined reference value; and a backlight luminance adjusting unit which receives a comparison result of the comparison processing unit and adjusts luminance of the backlight so that the sensor output is close to a predetermined allowable lower limit output value.

Abstract: Disclosed herein is a local dimming driving method and device of an LCD device, which is capable of minimizing luminance deviation at the same gray scale due to a dimming difference between blocks. The local dimming driving method of the LCD device includes analyzing input image data in units of blocks and determining a local dimming value per block, performing spatial filtering with respect to the local dimming value per block, repeating spatial filtering by a predetermined repeat count, and controlling luminance of a backlight unit on a block-by-block basis using the local dimming value per block controlled by spatial filtering.

Abstract: The invention relates to an illumination system (2), aluminaire (2), a backlighting system and a display device. The illumination system according to the invention comprises a light exit window (30) for emitting light from the illumination system, and a diffuse reflecting screen (40) arranged opposite the light exit window. The illumination system further comprises a light source (20) which is arranged for indirect illumination of the light exit window via the diffuse reflecting screen. The light source is arranged near an edge of the light exit window on an imaginary plane (22) arranged substantially parallel to the light exit window and emits light away from the light exit window. The illumination system further comprises an edge wall (62) comprising a specular reflecting mirror (60) being concavely shaped for reflecting at least part of the light emitted by the light source towards the diffuse reflecting screen.

Abstract: It is an object of the present invention to provide a lighting device including a chassis, a lamp, and a lamp holder for mounting the lamp on the chassis, in which the lamp is less likely to be damaged due to warping or distortion of the chassis. A backlight according to the present invention includes linear cold cathode fluorescent tubes arranged in parallel with each other, a chassis housing the cold cathode fluorescent tubes, and lamp clips mounting the cold cathode fluorescent tubes on the chassis. The lamp clips are each arranged at least 0.125X away from ends of the chassis in an axial direction of the cold cathode fluorescent tube, in which is a length of the chassis measured in the axial direction of the cold cathode fluorescent tube.

Abstract: Disclosed are an illumination device to be located immediately below an object to be illuminated, wherein a plurality of point-like light sources are arranged, and a display device provided with the illumination device. Even in a structure wherein the light emitted from point-like light sources is diffused and planarly emitted, in order to provide an illumination device which can uniformly and planarly emit the light without reducing the light intensity at the overlapped portion of the light emitted from the point-like light sources, point-like light sources (LED light sources) each diffusing the light to be emitted in a square-shaped light emission distribution, and an illumination device (LED backlight device) wherein the point-like light sources are arranged in a planar manner so that the square-shaped light emission distributions of the light diffused by the point-like light sources are overlapped in parallel.

Abstract: A lighting device includes a cold cathode fluorescent tube (CCFT), a chassis housing the CCFT, and a retainer holding the CCFT such that the CCFT is allowed to be displaced with respect to a bottom plate of the chassis in a direction perpendicular to an axis of the CCFT. According to the lighting device, the CCFT can be deformed in a curved shape when an external force is applied from the chassis to the CCFT due to an error in a mounting pitch of the cold cathode fluorescent tube or thermal contraction of the chassis. This releases the external force, and thus the CCFT is less likely to be broken.

Abstract: A backlight for a display includes a plurality of illumination modules, each illumination module including a light source and a reflective member. A portion of the reflective member is disposed over the light source. A liquid crystal display panel is disposed over the plurality of illumination modules. The reflective member is configured such that a majority of light from the light source is directed parallel to the liquid crystal display panel, to provide uniform illumination of the liquid crystal display panel. In some embodiments, the light source is at least one semiconductor light emitting diode.

Abstract: An LCD device using LEDs as light sources provided herein is capable of reducing the manufacturing cost and the power consumption by a reduction in the number of LEDs used. A backlight according to the present invention includes LEDs mounted on a wiring board and a light guide plate having a matrix array of light guide plate blocks assigned the LEDs. The number of LEDs assigned to the block located in a peripheral area is smaller than the number assigned to the block located around the center to reduce the number of LEDs used in the backlight. If a ratio of the brightness in a peripheral area of the screen to the brightness in a central area is 60% or higher, the human eye does not perceive non-uniform luminance. Thus, the manufacturing cost and the power consumption of the LCD device can be reduced.

Abstract: A flat panel display for reducing damage to a panel assembly from a falling impact is disclosed. In one embodiment, the display includes: 1) a liquid crystal panel assembly configured to display an image and 2) a backlight assembly including i) a light source configured to provide light to the liquid crystal panel assembly, ii) a flexible printed circuit board (FPCB) configured to provide power for the light source to generate the light, and iii) a light guide panel configured to guide the light received from the light source. The display may further include 1) a mold frame surrounding the flexible printed circuit board, 2) a chassis accommodating the mold frame and 3) a weight unit formed in at least one of the chassis and mold frame, wherein the weight unit is formed at a place that is eccentric with respect to the center of the liquid crystal panel assembly.

Abstract: An electronic device may be provided with a display having a thin-film transistor layer. One or more holes in the thin-film transistor layer may be used to form pathways from display circuitry to other circuitry underneath the display. One or more conductive bridges may pass through holes in the thin-film transistor layer and may have one end that couples to the display circuitry and a second end that couples to a printed circuit underneath the display. These conductive bridges may be formed from wire bonding. Wire bond connections may be encapsulated with potting material to improve the reliability of the wire bond and increase the resiliency of the display. Display signal lines may be routed through holes in a thin-film transistor layer to run along a backside of the display thereby reducing the need for space in the border region for display circuitry.

Abstract: Provided are a light emitting device, a light emitting device package, and a lighting system. The light emitting device (LED) comprises an LED chip, a barrier over the LED chip, and an encapsulating material containing a phosphor, wherein the encapsulating material is disposed inside the barrier over the LED chip.

Abstract: It is aimed to provide an LCD backlight device and liquid crystal display that can suppress light quantity loss and ensure uniform brightness. An LCD backlight device 101 has a laser light source 1 that emits laser light, and a light guiding plate 3 that transforms the laser light from the laser light source 1 into linear laser light, and transforms the linear laser light into a planar laser light, and emits the planar laser light, and the light guiding plate 3 has a third side face 6 that transforms the linear laser light into the planar laser light by reflecting the linear laser light by a plurality of reflection surfaces that are formed along the entrance direction of the linear laser light.

Abstract: A light source unit (100) switches one or more of light source groups (P, Q, R), each comprising one or more of light sources (110), ON and OFF for each light source group or each light source. The light source unit (100) includes: a flexible printed wiring board (120); one or more of light source groups (P, Q, R) mounted on a first surface of the flexible printed wiring board (120); and a metal support plate (130) attached to a second surface on the opposite side to the first surface of the flexible printed wiring board (120) via an adhesive layer (140). The heat conductivity of the adhesive layer (140) in the vertical direction is set so as to be less than the heat conductivity in a base material layer (121) of the flexible printed wiring board (120) in the vertical direction.

Abstract: Provided is a backlight unit with an extending portion that extends from one of a plurality of sheets included in an optical sheet. The optical sheet is on a light guide plate, and a light emitting diode chip is disposed at a side of the light guide plate. A portion of a flexible printed circuit board, to which the light emitting diode chip is mounted, overlaps a portion of the light guide plate. The extending portion overlaps the portion of the flexible printed circuit board. Thus, the occurrence of lines of light due to light progressing between the light guide plate and the flexible printed circuit board can be prevented, thereby obtaining uniform brightness and improving image quality.

Abstract: A lighting device 12 of the present invention includes a plurality of light sources 17 and a chassis 14 that accommodates the light sources 17. The chassis 14 is formed of a plate member and includes a bottom plate 14a of a flat plate and outer rims 21 having a folding configuration formed at the edges of the bottom plate 14a. The outer rim 21 includes a first folded portion 31 and a second folded portion 32 that is formed by further folding a part of the first folded portion 31. Since the outer rim 21 has a double folding configuration, strength of the outer rim 21 itself is increased to suppress distortion of the chassis 14. Accordingly, uniform brightness is provided.

Abstract: A light source apparatus having a plurality of light-emitting members, according to the present invention, comprises: a light source substrate provided with a plurality of light source groups each of which is configured by first to fourth light-emitting members; and a reflective sheet disposed on the light source substrate and having a hole exposing the light source group, wherein, on a surface parallel to the light source substrate, a circumscribed quadrangle of each of the first to fourth light-emitting members has a substantially rectangular shape, and a shorter side of one of two adjacent light-emitting members is positioned on substantially the same straight line as a longer side of the other one of the two adjacent light-emitting members.

Abstract: A backlight module and a liquid crystal display device using the same are provided. The backlight module comprises a back plate, and an upper surface of the back plate is an uneven surface. The uneven surface is composed of a plurality of protruded portions and a plurality of indented portions formed on the upper surface of the back plate; or, the uneven surface is composed of a matte surface formed on the upper surface of the back plate. A light emitting source coordinating with the back plate is disposed above the back plate, and faces the uneven surface to emit light.

Abstract: An illuminating device includes a light source body and a lens array. The light source body includes a plurality of light sources. The lens array includes an opposed surface, a reverse surface, a plurality of lenses, a recess, and a projection. The plurality of lenses corresponds respectively to the plurality of light sources. The plurality of lenses includes a first lens and a second lens, which is located adjacent to the first lens. The recess is formed at an end portion of the first lens adjacent to the second lens. The projection is formed at an end portion of the second lens adjacent to the first lens. The projection is coupled with the recess, so that at least a part of a boundary line between the first lens and the second lens is formed in a concave-convex shape as a result of a combination of the recess and the projection.

Abstract: An edge-type backlight module and a direct-type backlight module with a optical device are provided. The optical device comprises an array layer and a second refractive layer. The array layer has a first refractive index (n1) and contains pluralities of lenticular lens disposed on a base surface side by side. The lenticular lens contains a curving structure with a peak, a trough, a curvature radius (R), a width (P) and an altitude (H) between the peak and the trough. The trough is disposed on the base1 surface. The array layer has a first critical angle (?1c) relative to the normal of the base surface and satisfies ? 1 ? c = sin - 1 ? ( 1 n 1 ) and H = R 1 + K ? [ 1 - 1 - ( 1 + K ) ? ( P 2 ? R ) 2 ] . The conical constant (K) of the lenticular lens ranges from ?2.1 to ?1.5.

Abstract: A light source apparatus include a light guide plate, a plurality of optical sheets and a frame, wherein one of the optical sheets is a prism sheet having a plurality of prisms on one surface and one or more integrally formed dark part suppressing projecting pieces engaging the frame. A pair of dark part suppressing sides adjoin the dark part suppressing projecting piece and form a first angle equal to or smaller than a dark part suppressing angle. Second angles making a pair of angles formed with a straight line and each of dark part suppressing sides are equal to or smaller than half of the dark part suppressing angle. The straight line passes through a region formed between the pair of dark part suppressing sides, passes through an intersection point of the pair of dark part suppressing sides and is parallel or perpendicular to ridge lines of the prisms.

Abstract: A chassis assembly comprises a chassis 14 and lamp clips 18. The chassis 14 has mounting holes 33 to 35. Each lamp clip 18 includes a main body 27 to be mounted to the chassis 14, a lamp gripping portions 28 provided on the main body 27 so as to grip cold cathode tubes 17, and mounting portions 30 to 32 protruding from the main body 27 toward the chassis 14 side. The mounting portions 30 to 32 are to be inserted in the respective mounting holes 33 to 25. Rims of the mounting holes 33 to 35 are sandwiched between the main body 27 and the respective mounting portions 30 to 32. Three mounting portions 30 to 32 and three mounting holes 33 to 35 are provided in relative positions so as to restrict mounting of the lamp clip 18 to the chassis 14 in an orientation other than a predefined orientation.

Abstract: The invention relates to a backlighting system (10, 11, 12, 13, 14, 15, 16) and to a display device. The backlighting system comprises a plurality of segments (20, 21, 22, 23, 24) for selectively illuminating a predefined area of pixels of a display device. The backlighting system is configured for selectively controlling the intensity and/or color of the light emitted from the segment, each segment comprising a light source (30). The backlighting system (10, 11, 12, 13, 14, 15, 16) further comprises light barriers (40) for limiting the lateralspreading of the light emitted by the light source (30) towards the neighboring segments (20, 21, 22, 23, 24). The light barriers define grid-lines of a grid, and the light source (30) is arranged at a position on the grid-line which at least partially coincides with at least one of the light barriers.

Abstract: Disclosed is a backlight control apparatus for controlling a backlight used in a liquid crystal display, the backlight having a lighting area that includes a plurality of blocks in each of which a backlight luminance is individually allowed to change. The apparatus includes a backlight control unit that calculates the backlight luminance of each block so that the absolute value of the difference between a backlight lighting ratio and 1 is at or below a first value, and controls the backlight so as to yield the calculated backlight luminances of the respective blocks, the backlight lighting ratio being the ratio between backlight set values of neighboring blocks.

Abstract: A backlight which arranges light emitting diodes on a side surface of light guide plate adopts the structure which allows the easy removal of the light guide plate from a mold and makes it difficult for a stress or the like to influence the fine structure of a light incident portion of the light guide plate. In a liquid crystal display device having a backlight which radiates light to a liquid crystal panel, LEDs which constitute a light emitting element are mounted on a light guide plate which is mounted on a backlight, and edge portions of the light guide plate are tapered such that a width of the light guide plate is increased in the removal direction of the side surface of the light guide plate. Further, an ejector-pin mark is formed on a lower surface of the light guide plate by pushing an ejector pin in the removal direction of the light guide plate.

Abstract: A backlight module is provided in the present invention. The backlight module includes a light guide plate, a light source plate and a plurality of side-view lighting elements. The light guide plate comprises a light guide body being an integrally-formed single plate body and comprising a plurality of elongated grooves and a plurality of penetrated grooves. The penetrated grooves and the elongated grooves are collectively arranged on a surface of the light guide plate to separate the light guide plate into a plurality of light emitting regions. The side-view lighting elements arranged on the light source plate are attached to a side of the light guide body and respectively disposed for the penetrated grooves to illuminate corresponding light emitting regions.

Abstract: A lighting apparatus according to the present invention is configured from a plurality of blocks controllable individually for brightness or color, wherein each of the blocks comprises a plurality of light emitting devices including a plurality of white light emitting devices and a plurality of colored light emitting devices, and the plurality of light emitting devices of each of the blocks are arranged in a matrix so that the white light emitting devices are positioned at four corners.

Abstract: Provided is a backlight device which can suppress a damage of a display panel or a diffusion sheet while suppressing the size of the device. The backlight device (20) includes: a diffusion sheet (25); and a support member (31) having a support plane (31a) for supporting the diffusion sheet and arranged below the diffusion sheet. The diffusion sheet has a center of gravity (G1) set at the arrow C direction, i.e., at the side opposite to a liquid crystal display panel (12) as compared to a contact position (tip end (P1)) between the lower surface (25d) of the diffusion sheet and the support plane of the support member when the diffusion sheet is not warped.

Abstract: A display may be based on a display unit that is mounted within a chassis. The display unit may be a liquid crystal display unit. A backlight may be used to illuminate the display unit. The backlight may include a light guide plate. Light from a light source may be launched into an edge of the light guide plate. Scattered light from the light guide plate may travel vertically along a vertical axis that is perpendicular to the plane that contains the light guide plate. The scattered light may pass through the display unit and may serve as backlight for the display. The light guide plate may be mounted within a rectangular opening in the chassis. The edges of the rectangular opening and the edges of the light guide plate may be configured to reduce excessive reflections. These edges may have reflection-reducing coatings, non-planar surfaces, and other reflection-reducing configurations.

Abstract: A technology for restricting or suppressing a lift of a reflection sheet in a direct backlight device is provided. The direct backlight device according to the present invention includes an LED board 30, LEDs 28, lenses 32, legs 31a, 31b and 31c, a reflection sheet 26. The LEDs 28 are arranged on a surface of the LED board 30. The lenses 32 cover the respective LEDs 28 from the light exit side and diffuse light from the LEDs 28. The legs 31a, 31b and 31c are arranged on the surface of the LED board 30 and support the lenses 32. The reflection sheet 26 has through holes 27. The LEDs 28 and the legs 31a, 31b and 31c are passed through the respective through holes 27 of the reflection sheet 26. The reflection sheet 26 includes projections 26a, 26b and 26c projecting inward from an edge of the corresponding through hole 27. The three projections 26a, 26b and 26c are held between the three legs 31a, 31b and 31c.

Abstract: A backlight module and a display device using the same are provided. The display device further includes a first panel and a second panel disposed on opposite sides of the backlight module. The backlight module has a light module and a back plate with a through hole formed on it. The light module includes a flexible circuit board having a first strip and a second strip. A plurality of first light sources and second light sources are respectively disposed on the first strip and the second strip. The flexible circuit board passes through the through hole, and the first strip and the second strip are on two opposite sides of the back plate. The first strip and the first light sources are distributed along a side of the first panel while a portion of the second strip is bent to extend along a side of the second strip.

Abstract: A lighting device includes a light source lamp, and a light-diffusing layer including a diffusing plate or a diffusing sheet, the light source lamp including a folded portion (curved portion), such as U-shaped tube, and the lighting device for display devices having any of, or a combination of: the folded portion of the light source lamp is covered with a lamp frame; an optical member provided with a light-reducing or light-shielding treatment is around the folded portion of the light source lamp; the folded portion of the light source lamp is outside an effective display region; the folded portion of the light source lamp includes a member reducing or shielding light; and a reflective member with a light-reducing treatment around the folded portion of the light source lamp. As a result, at least part of light generated from the curved portion of the light source lamp is reduced or shielded.

Abstract: The side surface of the light guide plate includes an incident surface which faces the light source unit in an opposed manner, and a fixing surface which is directed in the left-and-right direction orthogonal to the top-and-bottom direction which is the direction along which the light source unit and the incident surface each other in an opposed manner. An engaging portion which is engageable with a lower frame is formed on the fixing surface or an edge portion which forms the fixing surface. The engaging portion is configured to allow a change of a distance between the incident surface and the lower frame due to expansion or shrinkage of the light guide plate while restricting the movement of the light guide plate in the top-and-bottom direction.

Abstract: A lighting device for a display device includes a plurality of linear light sources and a light source holding member arranged to hold the linear light sources. The light source holding member includes a first member and a second member. A sliding mechanism is provided between the first member and the second member, so as to allow parallel displacement of the first member and the second member relative to each other. The first member includes a first light source holder arranged to directly hold a first linear light source of the plurality of linear light sources. The second member includes a second light source holder arranged to directly hold a second linear light source other than the first linear light source.

Abstract: A backlight device includes a frame, a linear light source, and a lamp holder. The lamp holder supports the linear light source. The lamp holder includes an arc-shaped arm component, a concave protrusion, and a pair of convex protrusions. The arm component has a middle portion and a pair of end portions. The end portions extend from the middle portion, respectively. The concave protrusion extends from the middle portion in a radial inward direction of the arm component. The concave protrusion has a concave face that contacts an outer peripheral face of the linear light source. The convex protrusions extend from the end portions in the radial inward direction of the arm component, respectively. Each of the convex protrusions has a convex face that contacts the outer peripheral face of the linear light source such that the convex protrusions press the linear light source against the concave protrusion.

Abstract: A liquid crystal display includes a main body, a screen positioned on the main body, a backlight module positioned in the main body and supplying light for the screen, a controller for controlling the brightness of the backlight module and an ambient light sensor positioned on the main body. The ambient light sensor includes a barrel, an optical sheet positioned at an end of the barrel and a photosensitive unit positioned at the other end of the barrel. The photosensitive unit creates a signal according to the ambient light received via the optical sheet, and sends the signal to the controller. The controller adjusts the brightness of the backlight module. The optical sheet includes a first surface, a second surface opposite the first surface and a plurality of V-shaped micro structures formed on the first surface.

Abstract: A frame structure of a backlight module includes a body and a mold frame. A side wall surrounds a bearing surface of the body, and the side wall has at least one stopper and at least one positioning hole. A side edge of the mold frame has at least one positioning post. When the mold frame is disposed on the side wall, the side edge of the mold frame leans against the stopper, and the positioning post of the mold frame is embedded in the positioning hole.

Abstract: An optical plate includes a planar base and a plurality of rounded prisms formed on the planar base. The rounded prisms improve a uniformity of the light passing through the planar base and then irradiate the light having the improved uniformity. A concave peak formed in each of the plurality of rounded prisms of the optical plate scatters the light provided into a rear face of the optical plate so that dark lines and bright lines are not generated on the optical plate. As a result, the optical plate has improved light efficiency.

Abstract: An LCD backlight driving device with an isolating transformer comprises a DC power supply, a square wave generator, a square wave controller, said isolating transformer and a driver transformer; wherein said isolating transformer has a primary side connected to said square wave generator and a secondary side connected to said driver transformer, since said isolating transformer is placed between said square wave generator and said driver transformer, it helps to effectively shorten a safety distance required for setting up said driver transformer; the present invention uses said isolating transformer to shorten the safety distance required than that of using said driver transformer directly and to decrease an area in implementing a circuit board and to cut cost of said device.

Abstract: In a diffusion sheet (46), first reflection areas (AR1) with high reflectance and second reflection areas (AR2) with low reflectance are alternately arranged parallel to each other on a light receiving surface (46R), and third reflection areas (AR3) with high reflectance and fourth reflection areas (AR4) with low reflectance are alternately arranged parallel to each other on an light emitting surface (46F). In the diffusion sheet (46), the first reflection areas (AR1) and the fourth reflection areas (AR4) are opposed to each other, and the second reflection areas (AR2) and the third reflection areas (AR3) are opposed to each other.

Abstract: A planar light source device includes a first light source for emitting a first light ray having a punctate spatial luminance distribution; a second light source for emitting a second light ray; a first spatial luminance distribution conversion portion for changing the first light ray to a linear spatial luminance distribution; a second spatial luminance distribution conversion portion for changing a spatial luminance distribution of the first and second light rays to a planar spatial luminance distribution; wherein the first light ray is a laser light; the second light ray has a divergence angle larger than the divergence angle of the first light ray when the first light ray is emitted from the first light source; and a slow-axis direction of the first light ray entering the second spatial luminance distribution conversion portion is parallel to an outgoing direction of the planar light.

Abstract: A backlight module includes at least one point light source and a light guide plate. The light guide plate includes a light emitting surface, a bottom surface, a light incident surface, a first side surface, a second side surface, a first microstructure, and a second microstructure. The bottom surface is opposite to the light emitting surface, the light incident surface connects the light emitting surface and the bottom surface, the point light source is disposed adjacent to the light incident surface, and the first microstructure is formed on the light incident surface. The first side surface is opposite to the light incident surface and connects the light emitting surface and the bottom surface, and the second side surface connects the light emitting surface, the bottom surface, the light incident surface, and the first side surface. The second microstructure is formed on the second side surface.

Abstract: The present invention relates to a liquid crystal display and method of preventing dazzling thereof, by which human eyes can be prevented from being fatigued by the intensity of radiation in a manner of detecting APL of an LCD TV and correcting brightness of a backlight. The present invention includes an APL detecting unit detecting APL of the liquid crystal display, a control unit increasing or decreasing a brightness of a backlight uniformly in inverse proportional to the APL value detected by the APL detecting unit, the control unit increasing the brightness of the backlight according to a decrement of the APL value by limiting the brightness of the backlight to a prescribed brightness for a preset reference section, and a backlight driving unit driving the backlight by controlling the brightness of the backlight under the control of the control unit.

Abstract: A liquid crystal display and a method of driving the same capable of improving contrast properties by implementing a local dimming method and achieving the slimness of the liquid crystal display are provided.

Abstract: A display device is provided including an optical waveguide, and a light source, and also a louver, a transparent/scattering state switching element, and a transmissive liquid crystal display panel, provided in order on the side of a light-emitting surface of the optical waveguide. The transparent/scattering state switching element switches between a state for scattering the incident light and a state for transmitting the light without scattering. The light source drive circuit causes the transparent/scattering state switching element to transfer from the transparent state to the scattering state, and when the viewing angle range of the display is switched from narrow to wide, the intensity of the light source is gradually increased in conjunction with the transition state of the transparent/scattering state switching element.

Abstract: A planar light-emitting device enabling more precise local dimming has a plurality of light-emitting units each including a lightguide plate and a plurality of light sources disposed successively in the lateral width direction of the light-entrance surface and adjacently facing a light-entrance surface of the lightguide plate to emit light into the lightguide plate through the light-entrance surface. The light sources are divided into a plurality of groups successively arranged in the width direction, each group including at least one light source. The lightguide plates of the light-emitting units are mutually adjacently disposed with their light-exiting surfaces being flush with each other. The planar light-emitting device has a light source output control unit that controls the outputs of the light sources for each group.

Abstract: A backlight assembly includes an optical member that diffuses light generated from lamps. The optical member includes first and second diffusion members that are designed to have light transmittance that complementarily vary according to areas. Thus, an optical member capable of supplying light having uniform brightness onto the whole display area of the LCD is easily designed.

Abstract: A lamp holding apparatus for mounting a lamp to a lamp mounting member includes a mounting plate provided with a locking portion which protrudes to a base side, inserted into a mounting hole provided at the base and is lockable to a peripheral edge of a back side thereof. The mounting plate is provided with a pin which protrudes to an opposite side from the base side and is capable of being gripped by an operator at a time of being attached to and detached from the base. The locking portion is disposed at a position corresponding to a back side of the pin. As a result, when the locking portion is inserted into the mounting hole while gripping the pin, both the locking portion and the mounting hole are easily positioned. Thus, at a time of insertion, bending forces are reduced.

Abstract: In a surface light source device including: a light source section having a light emitting face; an optical panel arranged so as to cover the light emitting face; and a at least one frame having a front face portion that covers the peripheral portion of the light emitting face, the at least one frame is composed of a plurality of divisional members connected with each other and a light shielding portion is provided at each slit between the divisional members in the front face portion of the at least one frame. Whereby, light from the light source section is prevented from leaking through each slit between the divisional members in the front face portion of the at least one frame.