Abstract: It is an object of present invention to improve wiring workability in a lighting device and to prevent the entry of dust or the like into the device. A backlight unit according to the present technology includes a chassis having hole portions, LEDs housed in the chassis as light sources, relaying and connecting part electrically connected to the LEDs from outside the chassis through the hole portion and relaying electric power supply to the LEDs, and a covering member covering a clearance between the hole portions and the relaying and connecting parts inserted therethrough.

Abstract: A field-sequential display is operated in one of a color mode or a grayscale mode. In the color mode, a video source provides image content in the form of multiple-color image data having a frame rate of X Hz and a display controller uses the multiple-color image data to drive the field-sequential display so as provide multiple-color image content at the field-sequential display. In the grayscale mode, the display controller generates grayscale image data from the multiple-color image data and the display controller then drives the field-sequential display with the grayscale image data at a lower frame rate of Y Hz. While in the grayscale mode, the display controller can take advantage of the enhanced contrast provided by the grayscale image content to reduce or disable backlighting at the field-sequential display. The reduced timing requirements afforded by the lower frame rate, as well as the reduction or elimination of backlighting, can reduce power consumption compared to the color mode.

Abstract: A backlight device 12 includes: a chassis having a bottom plate and side plates that stand towards the front of the bottom plate from the edges of the bottom plate, the face on one side of the bottom plate being a light-output part; an LED substrate disposed on the front surface of the bottom plate; LEDs 24 arranged on a plate face oriented toward the light-output part of the LED substrate and arranged so that the light-output part is on the light-emitting side thereof; a plurality of diffusion lenses 27 for covering the light-emitting side of the plurality of LEDs and diffusing the light from the LEDs 24; a first reflecting sheet 29 provided with light source insertion holes through which the LEDs 24 are inserted at positions corresponding to the LEDs 24, the first reflecting sheet being laid over the front surface of the bottom plate and over the LED substrate; and a second reflecting sheet 30 arranged so as to protrude in the direction in which the side plates rise, the ends of the second reflecting sheet

Abstract: Disclosed is a liquid crystal display (LCD) device capable of stable support of components. The LCD device comprises an LCD panel; a main support for supporting edges of the LCD panel; a light guide plate disposed at a rear side of the LCD panel; and at least one first pad for preventing the movement of the light guide plate through contact with the light guide plate between the main support and the light guide plate, wherein at least one first pad supporting portion is formed at one surface of the main support being faced with the light guide plate. Accordingly, defects of the LCD device resulting from an external force such as impact or heat are minimized, and the LCD device has a firm and stable structure.

Abstract: An illumination device is provided that can reduce the displacement of the position of a diffusion plate. This illumination device includes the diffusion plate and a fixing pin that fixes the diffusion plate. When seen in plan view from the side of the light emitting surface of the diffusion plate, a diffusion plate fixing portion is provided in a perimeter portion on the side of the light emitting surface of the diffusion plate, and the fixing pin is engaged with the diffusion plate fixing portion.

Abstract: A condensing sheet, a backlight unit and a liquid crystal display device using the same are disclosed. The condensing sheet includes a base film, and a plurality of ,condensation patterns formed on the base film, wherein a first area and a second area are alternately defined on an upper surface of the base film, at least two condensation patterns are arranged in the first area, and a flat surface is formed in the second area, and wherein a width of each of the condensation patterns may be greater than a width of the flat surface.

Abstract: A transparent display device and a method of manufacturing the same are provided. The transparent display device includes: a display panel unit including: a first side configured to display an image, and a second side opposed to the first side, and a variable blocking film at the second side of the display panel unit, the variable blocking film including electrochromic core-shell nanoparticles.

Abstract: This invention provides a display device and a backlight module thereof, wherein the backlight module includes a backplate, a frame body, and a first optical film. The frame body is disposed on the backplate and extending along the inner surface of the sidewall. A concave portion is formed on the frame body and exposes the inner surface of the sidewall. The first optical film has a protrusion portion extending to the concave portion, wherein the frame body extends along the edge of the first optical film. The protrusion portion includes a main body and a shelter portion, wherein the shelter portion bends in opposition to the main body and at least partially shelter a portion of the sidewall exposed by the concave portion.

Abstract: Disclosed are a mobile terminal and a method of controlling a mobile terminal. A different backlight dimming algorithm can be applied according to an application, and a dimming algorithm is selectively applied in association with an input image during executing of a specific application.

Abstract: The present invention provides a liquid crystal display device including a multiple primary color panel capable of improving the display quality in the vicinity of a monochromatic color, and a control method therefor. The present invention provides a liquid crystal display device that performs display by input thereto of image signals for three colors from outside. The liquid crystal display device includes a liquid crystal display panel and a backlight. A plurality of pixels each including picture elements of four colors or more are formed in a display region of the liquid crystal display panel. Each pixel includes picture elements of three colors, provided with color filters having colors corresponding to the respective colors of the image signals, and at least one picture element of other color(s), provided with a color filter having a color corresponding to a color other than the colors of the image signals.

Abstract: Provided is a backlight unit. The backlight unit includes a light source, an optical member configured to uniformly distribute light emitted from the light source, and at least two condensing films configured to condense light from the optical member. Hetero-conic lenses are two-dimensionally arranged on a surface of each of the condensing films, and each of the hetero-conic lenses is formed by combining a first conic lens expressed by Formula (1) below and a second conic lens expressed by Formula (2) below: y = H 1 - x 2 / r 1 1 + 1 - ( 1 + k 1 ) ? ( 1 / r 1 ) 2 ? x 2 ? ? ( 0 ? y ? y 0 ) Formula ? ? ( 1 ) y = H 2 - x 2 / r 2 1 + 1 - ( 1 + k 2 ) ? ( 1 / r 2 ) 2 ? x 2 + y 0 ? ? ( y 0 ? y ? H 2 ) .

Abstract: A method for driving a light source and maintaining its target white color coordinates despite of varied and decreased light source luminance includes detecting an amount of colored light generated from a plurality of colored light sources, comparing detected colored light to reference data and verifying that colored light source has the correct preset duty cycle. If the colored light source is driven by the preset duty cycle, the method includes modifying the reference data based on the detected light from the colored light source and adjusting the amount of colored light by controlling a driving signal to the colored light sources based on the modified reference data.

Abstract: A back light unit capable of achieving a reduction in thickness and manufacturing costs is disclosed. The back light unit includes light sources arranged in parallel, to emit light, a case receiving the light sources, a diffuser plate diffusing the light from the light sources, condensers laminated on the diffuser plate and having predetermined thicknesses, and a diffuser interposed between the adjacent condensers. The distance from the lamps to the diffuser plate is reduced by the diffuser plate and the optical sheets (three or four sheets) laminated over the diffuser plate, to reduce the total thickness of the back light unit. Also, the number of lamps is reduced by 2 to 4, as compared to the conventional back light unit, so that the manufacturing costs of the back light unit is reduced. The brightness difference exhibited on the display screen is also reduced, so that a brightness uniformity is achieved.

Abstract: A liquid crystal display device includes a liquid crystal panel; a main frame surrounding sides of the liquid crystal panel; a backlight unit disposed under the liquid crystal panel and surrounded by the main frame, the backlight unit including a light guide plate, a lamp at a side of the light guide plate, a reflector under the light guide plate and an optical sheet on the light guide plate, wherein a rear surface of the reflector is exposed through an opening of the main frame; and a protection sheet attached to the rear surface of the reflector to protect the rear surface of the reflector and including a protruding part at a side of the protection sheet, the protection sheet has a rectangular shape.

Abstract: An object is to provided a lighting device in which damage due to friction between a reflection sheet and a light guide plate is reduced or suppressed even if a stress is applied toward the reflection sheet by a housing due to asperities of a bottom plate of the housing. A backlight unit 24 according to the present invention includes a light guide plate 20, an LED unit 32, a reflection sheet 26, a backlight chassis 22, and a cushion sheet 27. The light guide plate 20 has a light entrance surface 20a that is a side surface, a light exit surface 20b that is a plate surface, and an opposite surface 20c that is an opposite surface from the light exit surface 20b. The LED unit 32 is arranged opposite the light entrance surface 20a of the light guide plate 20. The reflection sheet 26 is arranged so as to be in contact with the opposite surface 20c of the light guide plate 20. The backlight chassis 22 holds at least the reflection sheet 26 and the light guide plate 20 therein.

Abstract: A display device includes a display panel including a front substrate and a back substrate, a backlight unit disposed in the rear of the display panel, and a plurality of brackets attached to a non-display area of a back surface of the display panel. Each of the plurality of brackets includes a first portion and a second portion positioned between the first portion and the back substrate. A width of the second portion is greater than a width of the first portion. The second portion is positioned adjacent to the back substrate.

Abstract: A system and method for creating a trompe-l'oeil skylight in a ceiling where a light emitting image of the sky is provided in a structure configured to emulate a skylight frame, including an embodiment of a unified non-rectangular sky image area in a substantially rectangular fixture which mount as a single unit into a substantially rectangular hole in a ceiling.

Abstract: The present disclosure provides an optical fixing structure, a backlight module, and an assembly method thereof. The optical film fixing structure includes a back plate, a receiving portion, a connecting member, and a rotating member; wherein the receiving portion is fixed onto the back plate, a lower end of the connecting member is connected to the receiving portion, an upper end of the connecting member is connected to the rotating member, a fixing force is generated and applied to an optical film located between the rotating member and the receiving member by rotating the rotating member along a predetermined direction. In the present disclosure, the connecting member is connected to the receiving portion, and the optical film suspends on the connecting member.

Abstract: The present invention provides a display device which can ensure a large viewing angle while maintaining high light source energy use efficiency. The display device 10, which outputs light emitted from a light source 25 to an observer side in a form of an image, comprises: a light guide plate 21 which has a light output face, a back face, and a side face positioned between the light output face and the back face; a light source 25 which emits light to the side face of the light guide plate; an optical sheet 30 disposed on the observer side of the light guide plate; a liquid crystal panel 15 disposed on the observer side of the optical sheet; and a device 40 for enlarging a view disposed on the observer side of the liquid crystal panel.

Abstract: The liquid crystal display device has a liquid crystal display panel, a backlight for illuminating the liquid crystal display panel where the outer shape of the backlight in a plane has at least one corner of which the angle is greater than 90°, and a light guide plate LG having approximately the same form as the outer shape of the backlight, wherein a number of light emitting diodes are aligned along two sides (s1, s3) of the light guide plate LG that form a corner A of which the angle is greater than 90°, and the main light for illumination (L2 to L4, L6 and L7) from the light emitting diodes aligned along the two sides propagates through the light guide plate LG in the same direction.

Abstract: The present disclosure relates to a hybrid type liquid crystal display device. The present disclosure suggests a hybrid type liquid crystal display device comprising a liquid crystal display panel having a display area; and a window area defined within the display area, wherein an image disposed at outside of the liquid crystal display panel is shown in front of the liquid crystal panel through the window area. The present disclosure suggests a hybrid type display device in which main video data is represented using the liquid crystal display device, an additional image represented on an external screen is shown through the liquid crystal display device, or the external image can be shown by overlapping with the main video data of the liquid crystal display device, as needed.

Abstract: An outdoor readable liquid crystal display device (200) includes a liquid crystal panel (210), a backlight device (220) and a light source control device. The backlight device (220) includes a plurality of red light emitting diodes (220r), green light emitting diodes (220g) and blue light emitting diodes (220b). The light source control device is used to adjust the backlight device (220) based on the light intensity of ambient light. When the light intensity of ambient light is lower than a predetermined light intensity of the liquid crystal display device (200), the red light emitting diodes (220r), the green light emitting diodes (220g) and the blue light emitting diodes (220b) of the backlight device (220) are sequentially energized to emit lights at a predetermined time lag.

Abstract: Novel light diffusers that include both bulk and surface diffuser elements are provided. One embodiment includes diffusing elements forming a structured coating on a substantially clear substrate. Another embodiment includes a bulk diffuser with a structured surface. Methods for making and methods of using the light diffusers are also disclosed.

Abstract: Exemplary embodiments disclosed herein provide a rigid LCD assembly including a LCD having a perimeter, a first layer of tape around the perimeter of the LCD, and a diffusing plate attached to the later of tape so as to create a cavity defined by the space between the LCD, tape, and diffusing plate. One or more optical films may be inserted into the cavity, and while constricted in directions perpendicular to the films, the films may be free to move slightly in the directions parallel to the films. A U-shaped backlight wall may attach to the diffusing plate and would contain a backlight. An optional thermal plate can be attached to the backlight wall, which can be used with a second thermal plate to define a channel for accepting cooling air.

Abstract: Techniques for using variable flower assemblies to control light leakage between designated portions of light-emitting elements are provided. In some embodiments, a variable flower assembly (100) comprises a plurality of light-transmissive segments (102-1, 102-2, . . . , 102-6) each may be electronically set to a different light-transparency level. The variable flower assembly substantially forms a tube around a light-emitting element (104) mounted on a first plane. A first edge of each of the light-transmissive segments collectively surrounds the light-emitting element on a second plane substantially parallel to the first plane. A second opposing edge of each of the light-transmissive segments collectively forms an opening of the tube. In some embodiments, a reflective assembly (120) which reflectance level is electronically controllable may surround the variable flower assembly.

Abstract: A backlight assembly includes a light guide plate, a light source, a mold and a main frame. The light guide plate includes a first surface and a second surface extending from the first surface. The light source is disposed adjacent to the first surface of the light guide plate. The mold includes an upper portion, a lower portion and a side portion. The side portion connects to the upper and lower portions to form a receiving space, and the receiving space receives the light source and the first surface of the light guide plate. The main frame includes side walls and an upper wall extending from an upper portion of the side walls, and the mold is disposed in an opening below the upper wall.

Abstract: A display arrangement includes a decoration layer, a light source underneath the decoration layer, and a lens layer arranged between the decoration layer and the light source. The decoration layer includes at least one void formed in the shape of a character when viewed from above. The lens layer is at least semi-transparent to permit transmission of light from the light source through the void. An optical structure is arranged in alignment with the void and is adapted to reduce intensity of the light in a peripheral region of the void so as to reduce a halo effect. The decoration layer may be formed as an external layer of a key or a button of a portable electronic device, or an outer casing of a portable electronic device.

Abstract: A backlight module has a light guide plate, a back plate and light emitting assemblies. The light guide plate is substantially prism-like. The back plate has a shape corresponding to that of the light guide plate, and has an inclined first side plate and an inclined second side plate opposite to the first side plate. Each of the first and second side plates has at least one receiving recess, and the light emitting assemblies are received in the receiving recesses. In comparison with a side-light type backlight module, the present invention saves a heat-dissipation aluminum extrusion member. In comparison with a direct-light type backlight module, the present invention shortens the light mixing distance in a vertical direction, so as to reduce the module thickness.

Abstract: A backlight (10) includes a front and back reflectors (12,14) forming a light recycling cavity (16) and one or more light source members (24a, 24b, 24c) disposed to emit light into the light recycling cavity. The front reflector (12) being partially reflective to provide an output illumination area. The front reflector (12) has a blue sloped transmission spectra, at normal incidence with a range among bin values from 15% to 100%.

Abstract: A display system, with a structural part, including a rear panel, and a light emitting device physically attached to the rear panel over a surface of the rear panel, where the surface of the rear panel comprises the entire surface to be illuminated by the light emitting device and a pixelated spatial light modulator part, coupled between the light emitting device, and a viewing area, modulating a light created by said light emitting device.

Abstract: An illumination device according to the present invention is provided with: a chassis (14); a cold-cathode tube (17); an optical member (15); a clamping member (30) that is provided at an aperture edge (14b) of the chassis (14), has a supporting section (36) and a frame (16), and moves together with the deformation of the chassis (14); and a buffer part (31) that is disposed between the optical member (15) and the frame (16), wherein the buffer part (31) is provided with a plurality of mountain-shaped protrusions (32) arrayed in parallel in the peripheral direction of the aperture edge (14b) and having a mountain shape in a cross section and a rectangular shape in a plan view, the mountain-shaped protrusion having top parts thereof contacting the optical member (15), and wherein, in the mountain-shaped protrusions (32), of the two inclined surfaces constituting each mountain-shaped protrusion (32) in a cross-sectional view, a first inclination angle (?1) formed by the optical member (15) and a first inclined

Abstract: A backlight unit 12 according to the present invention includes LEDs 17 as light sources, an LED board 18 mounting the LEDs 17 thereon, a chassis 14 that stores the LED board 18 therein and includes an attachment hole 14e, a body portion 24 that sandwiches the LED board 18 between the body portion 24 and the chassis 14 and holds the LED board 18, and a board holding member 20 including an attachment portion 25 that is protruded from the body portion 24 toward the chassis 14 to be inserted into the attachment hole 14e, and the board holding member 20 is configured to be rotatable along a plate surface of the chassis 14 between a holding position at which the attachment portion 25 overlaps with an edge of the attachment hole 14e in a plan view and sandwiches the edge of the attachment hole 14e between the attachment portion 25 and the body portion 24 and a non-holding position at which the attachment portion 25 does not overlap with the edge of the attachment hole 14e in a plan view and attaching and detaching

Abstract: Uneven brightness is less likely to occur in a backlight unit. In a backlight unit 12, suppose that a maximum value and a minimum value of light reflectance of at least a first surface 30a of a diffuser plate 30 facing a hot cathode tube 17 are defined as Rmax Rmin, respectively, a rising proximal position BP of each rising portion 20b of a reflection sheet 20 is provided to overlap with an area of the diffuser plate 30 having light reflectance R that satisfies the Expression given below, and a rising distal position EP of each rising portion 20b is provided not to overlap with an area of the diffuser plate 30 having the light reflectance R that satisfies the Expression given below.

Abstract: A flat panel display device includes a backlight system and a display panel, wherein: the backlight system includes a light source, a light homogenization mechanism, and a back frame; the back frame carries the light source and the light homogenization mechanism and the back frame includes at least first and second primary assembling pieces, wherein the first primary assembling piece has an end forming at least two joint sections, each of the joint sections having a structure mating an end of the second primary assembling piece, the first primary assembling piece using one of the joint sections to join the corresponding end of the second primary assembling piece, the primary assembling pieces comprising positioning sections, the positioning section cooperating with a back panel of the flat panel display device to position the back frame. A stereoscopic display device and a plasma display device are also provided.

Abstract: In a display apparatus according to one or more embodiments, a boosting circuit boosts an input voltage to a backlight driving voltage, and a backlight unit receives the backlight driving voltage to generate light. A backlight driving circuit controls the boosting circuit in response to a dimming signal and compensates a plurality of feedback voltages from the backlight unit to output a panel driving voltage. A panel driving circuit receives the panel driving voltage from the backlight driving circuit to output a data voltage corresponding to an image signal and receives a gate driving voltage to generate a gate voltage. A display panel displays an image in response to the gate voltage and the data voltage. Accordingly, a number of the boosting circuits for the display apparatus may decrease, thereby reducing a manufacturing cost of the display apparatus.

Abstract: A display system and method uses a display element. The display element can provide linearly polarized light. A wave retarder film can be configured to adjust the phase of the linearly polarized light so that reflections of the linearly polarized light from a surface in the environment of the display are reduced. A first light control layer is configured to constrain the field of view of the display in at least a first direction.

Abstract: There are provided a light source device and a display device which do not generate a wrinkle on an optical sheet even if the optical sheet is held on an LED substrate. A reflection sheet is disposed between each of head portions possessed by a rivet, a positioning rivet and a support rivet and one surface of an LED substrate where an LED is mounted, and a gap in a direction of a sheet thickness is provided between the head portion of each of the rivets and the reflection sheet. In the case in which a sudden thermal change is caused, therefore, the reflection sheet expands or contracts between the head portion of each of the rivets and the reflection sheet so that the wrinkle can be prevented from being generated over the reflection sheet.

Abstract: An array-type display apparatus includes display devices each including a display section and a non-display area located around the display section, and transparent plates disposed on the viewer side. Each transparent plate has: a light exit-side deflection portion, provided in a position corresponding to the non-display area, for allowing at least part of light from the display section to exit the transparent plate in the front direction of the display section; and corner deflection portions, provided at the corners of the viewer-side surface, for allowing at least part of light that has passed through the transparent plate to exit it in the front direction. The width of the light exit-side deflection portion is larger than the width of the non-display area.

Abstract: A backlight source and a thinning method for the same are provided. The backlight source includes: a solid state light source array having a plurality of solid state light sources distributed on the base, a light transmitting unit arranged above the solid state light source array, and a plurality of light adjusting units arranged between the solid state light source array and the light transmitting unit. The plurality of the light adjusting units is arranged above the plurality of solid state light sources to reflect the shallow angle incident light from the solid state light source, thus changes the light intensity distribution of the output light through the light transmitting unit from the solid state light sources from Lambertian distribution to main sides emission.

Abstract: A backlight module includes a housing, a light emitting unit, plural supporters and a light guiding plate. The housing includes a base and a first frame and a second frame arranged on two opposite sides of the base. Each supporter includes two supporting portions placed on two opposite sides of the light emitting unit. Each supporting portion includes a supporting surface facing the light emitting unit, wherein the supporting surface is slant. A distance between two opposite supporting portions is increased along a direction from the base to a top surface of the supporter. The light guiding plate is arranged on the supporting surfaces of the supporters. The light guiding plate includes a light input surface facing to the light emitting unit and a light output surface facing the first frame.

Abstract: A backlight device wherein LEDs which are arranged side by side at a first arrangement interval (P1) are provided to each LED unit. The LED units are mounted to a flexible board at a second arrangement interval. A light guide plate is disposed in such a manner that an end surface thereof is spaced from the LEDs by a distance (H). The light guide plate is disposed so as to satisfy the following relationship: first arrangement interval (P1)<distance (H)<second arrangement interval (P2). Specifically, the LEDs are arranged side by side in such a manner that the first arrangement interval (P1) is not less than 0.1 mm but not greater than 3 mm and the second arrangement interval (P2) is not less than 5 mm but not greater than 15 mm. The light guide plate is disposed in such a manner that the distance (H) is not less than 1 mm but not greater than 7 mm.

Abstract: The present invention provides a direct backlight module and a liquid crystal display module using the backlight module. The backlight module includes a backplane, a diffusion platen arranged inside the backplane, and backlight sources mounted to the backplane and located under the diffusion plate. The backplane includes a bottom board and side boards connected to the bottom board. The bottom board forms receiving openings. The backlight sources are mounted to a side of the bottom board that is distant from the diffusion plate to correspond to the receiving openings. With the backplane having a bottom board that includes a circumferential frame and braces collectively defining receiving openings and backlight sources being mounted to a side of the bottom board that is distant from a diffusion plate to correspond to the receiving openings, it only need to remove the backlight sources in maintaining or replacing the backlight sources.

Abstract: A light directing substrate includes a back major surface and a front major surface opposing the back surface. The back major surface includes light reflection regions and light transmission regions. The front surface includes a plurality of lenticular lens elements. A graphic image disposed on or in the light directing substrate.

Abstract: A lighting device 12 includes a light source 17, a chassis 14 housing the light source 17 and an optical member 15a provided to face the light source 17. The optical member 15a includes a light source overlapping portion DN that overlaps a light source installation area of the chassis 14 where the light source 17 is arranged and an empty area overlapping portion DN that overlaps an empty area LN of the chassis 14 where no light source 17 is arranged. A light reflecting portion 40 is formed on at least the light source overlapping portion DA such that light reflectance of the light source overlapping portion DA is relatively higher than that of the empty area overlapping portion DN. A color adjustment portion 50 is formed on the optical member 15a to adjust color of the light source overlapping portion DA and the empty area overlapping portion DN.

Abstract: An embodiment discloses a light emitting device package including a first lead frame and a second lead frame disposed spaced from each other, a light emitting device disposed on the first lead frame, and a reflective sidewall disposed on the first lead frame and the second lead frame to surround the light emitting device, wherein a portion of the reflective sidewall has a height higher than the other portion of the reflective sidewall.

Abstract: A display device includes a display component, a plurality of light sources, a flat optical member, a rear side support member, and a reflective sheet. The light sources are disposed on a rear side of the display device relative to the display component. The light sources irradiate the display component with light. The light sources are arranged with respect to the rear side support member such that among light emitted towards the display component from an edge-side light source that is disposed closest to an edge portion of the rear side support member out of the light sources, light emitted at a brightness that is at least half of an maximum brightness of the edge-side light source reaches an edge portion of the flat optical member corresponding to the edge portion of the rear side support member.

Abstract: A method and device are provided for adjusting brightness of an optical touch panel. The optical touch panel comprises a microprocessor, a display module including a back light source, and an optical position detection device including optical transmitting devices and optical receiving devices. The method comprises detecting, via the optical receiving devices, a current ambient light level on the display module. The method further comprises generating, via the optical receiving devices, a current ambient light level signal indicative of the current ambient light level and transmitting the current ambient light level signal to the microprocessor. Furthermore, the method comprises adjusting, via the microprocessor, brightness of the back light source based on the current ambient light level signal.

Abstract: A light emitting device includes: a substrate; a semiconductor light emitting element provided on the substrate; a sealing member which covers the semiconductor light emitting element; and a lens having a plurality of convex parts and a concave part. The light emitting device emits light having a non-concentric luminance distribution made up of a plurality of bright regions and a plurality of dark regions, the non-concentric luminance distribution being observed on a plane which is parallel to the substrate. This makes it possible to provide (i) a display device which has a thin body and hardly causes unevenness in luminance and in chromaticity, and (ii) a light emitting device and (iii) a surface illuminant suitable, which are suitable for use in the display device.

Abstract: A backlight unit 12 includes LED units 17, a light guide plate 18 and a follow-up mechanism. The light guide plate 18 has light entrance surfaces 18b and a light exit surface 18a. The light entrance surfaces 18b are provided so as to face the respective LED units 17. The light exit surface 18a is provided parallel to an arrangement direction in which the LED units 17 and the light entrance surface 18b are arranged (i.e., the Y-axis direction) and such that light exits therethrough. The follow-up mechanism is configured to move the LED unit 17U in the arrangement direction in response to a deformation of the light guide plate 18. The follow-up mechanism includes a support member 20 that supports the LED unit 17U. The support member is in contact with a surface of the light guide plate 18 along the light entrance surface 18bU.

Abstract: A backlight unit (49) of a display device (69) having a liquid crystal display panel (59) is provided with a chassis (41), a diffusion plate (43) supported by the chassis, and a light source which irradiates the diffusion plate with light. The light source is constructed by combining a plurality of mounting substrates (21) provided with an LED (22) which serves as the light-emitting element and a diffusion lens (24) for covering the LED. Connectors (25A) are mounted on matching edges of the plurality of mounting substrates to electrically connect the substrates. The connectors are placed so as not to interfere with the illumination light region in which the LED imparts brightness to the diffusion plate. In order to achieve this state of non-interference, a beveled part (26) is formed on the side of the connectors facing the LED.