206results about How to "Uniform brightness distribution" patented technology

A light emitting apparatus and a production method of the apparatus are provided that can emit light with less color unevenness at high luminance. The apparatus includes a light emitting device, a transparent member receiving incident light emitted from the device, and a covering member. The transparent member is formed of an inorganic material light conversion member including an externally exposed emission surface, and a side surface contiguous to the emission surface. The covering member contains a reflective material, and covers at least the side surfaces of the transparent member. Substantially only the emission surface serves as the emission area of the apparatus. It is possible to provide emitted light having excellent directivity and luminance. Emitted light can be easily optically controlled. In the case where each light emitting apparatus is used as a unit light source, the apparatus has high secondary usability.

A light guide plate has an end surface configured to have light incident thereon, a light introduction part that confines light incident through the end surface, and a light guide plate body disposed to be continuously joined to the light introduction part. The light guide plate body has a thickness smaller than a maximum thickness of the light introduction part. The light guide plate body outputs the incident light to an outside from a lighting region through a light exit part. The light introduction part includes an inclined surface in at least one of a light-exit-side surface and an opposite surface of the light-exit-side surface. The directivity change pattern changes directivity of the light passing to the lighting region from the light introduction part.

The present invention provides a liquid crystal display device of high quality having high brightness and uniform brightness distribution by focusing the light radiation direction from a light guide plate in the vertical direction with respect to a light radiation surface of the light guide plate. The liquid crystal display device includes a liquid crystal display panel and a flat lighting device which radiates an illumination light to a back surface of the liquid crystal display panel. The flat lighting device includes a light guide plate which has an upper surface facing a back surface of the liquid crystal display panel in an opposed manner and constituting a light radiation surface and a bottom surface which is arranged opposite to the upper surface. One LED is arranged at a first corner portion of the light guide plate and another LED is arranged at a second corner portion of the light guide plate arranged adjacent to the first corner portion. By forming reflection surfaces which are inclined toward the upper surface from the bottom surface of the light guide plate and inclined surfaces which abut on the reflection surfaces on the lower surface of the light guide plate, the light radiation direction from the light guide plate is focused in the vertical direction with respect to the upper surface of the light guide plate.

A light guide member laminated on the upper face of a luminous device mounting substrate on which a luminous device is mounted and which is for diffusing and guiding upward light emitted from the luminous device. The light guide member includes a light reflecting portion formed on the bottom face of the light guide member in an area other than an area near the luminous device, and a section in which a light reflecting portion is not formed on the bottom face of the light guide member at a position near the luminous device. Also disclosed is a planar light source device provided with the light guide member, and a display apparatus using the planar light source device.

The lighting apparatus comprises light sources (16) and a planar light conductor (18). The planar light conductor (18) includes opposed surfaces, side surfaces and end surfaces, and a plurality of prisms (28) are provided on one of the end surfaces (23). Said a plurality of prisms (28) have the function of the linear light conductor and provides a solid planar light conductor. The configuration of said plurality of prisms (28) is varied in accordance with positions thereof. The light source (16) is arranged so that the light is incident from position near the end surface. One of the opposed surfaces has means (26) for causing the light propagating inside the planar light conductor to exit from said one of the surfaces. The side surfaces or the bottom surface of the planar light conductor has slit (30, 32) or a groove (34). The liquid crystal display includes the lighting apparatus.

The invention discloses a three-dimensional visualization method based on point cloud and image data and a system thereof. The method comprises the following steps of collecting image data and point cloud data of a target scene; carrying out upsampling on the point cloud data, projecting the point cloud data after the upsampling to the image data so as to carry out fusion, coloring the fused point cloud data and acquiring the colorful point cloud data; and using the colorful point cloud data to carry out three-dimensional rendering and acquiring a three-dimensional visualization model of the target scene. In the invention, point-cloud three-dimensional visualization from data acquisition and fusion to final rendering display is realized, which is good for development of a laser point cloud technology; and accessibility and usability of the point cloud data to a common user are increased.

There is explored the structure of an illumination device having a board, an interconnection and a reflector plate arranged on the aforementioned board, an LED element connected to the aforementioned interconnection, and a transparent resin part sealing the aforementioned LED element; wherein the aforementioned transparent resin part has a recess in the top face and the aforementioned recess has a shape taking as the major axis some axial direction in the plane of the aforementioned board. Further, the structure of a liquid crystal display device using this illumination device is explored. With the illumination device or a liquid crystal backlight light source module, it is possible to implement a light source for implementing an area control function and having the required homogeneous brightness and chromaticity distribution.

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 constructed of a plate member including a flat bottom plate 14a and outer rims 21 having a folding configuration 31 formed at the edges of the bottom plate 14a. At the outer rim 21, a core member 40 extending in a longitudinal direction of the outer rim is provided in a folded part of the folding configuration 31. The outer rim 21 provided with the core member 40 improves strength of the outer rim 21 itself. This suppresses distortion of the chassis 14 and uniform brightness is provided.

A vehicle light which uses a laser light source device and has a shorter dimension in an optical axis direction than conventional vehicle lights. The vehicle light comprises a laser light source device and an optical system configured so as to form a predetermined light distribution pattern. The laser light source device includes: a cylindrical light-guiding part having a diffusing surface set in a region other than a light-introducing surface; a phosphor arranged in a light-emitting region on an outer circumferential surface of the light-guiding part; a reflective film arranged in a region of the light-guiding part other than the light-introducing surface and the light-emitting region; and a laser light source that outputs a laser beam which is introduced into the light-guiding part from the light-introducing surface and enters the phosphor. The light-guiding part and the laser light source are arranged adjacent to each other.

A light guide plate has a light guide plate member having a light incident surface on an end face of the light guide member, and a light emitting surface on a front surface of the light guide plate member, wherein the light incident surface is structured to have light incident thereon, and wherein the light emitting surface is structured to widen and emit light incident thereon out of the light guide plate member, and a directivity changing unit arranged on a light incident end portion of the light guide plate member on the front surface or a back surface of the light guide plate member. The directivity changing unit has a first inner inclined surface and a second inner inclined surface that change a directivity of the incident light within the directivity changing unit to widen the light laterally with respect to a direction perpendicular to the light incident surface.

A light emitting device can include a head portion including a surface including a convex portion, a back surface on the opposite side, and a through hole penetrating a tip surface of the convex portion and the back surface; a light-transmitting member including a surface and a back surface on the opposite side, the back surface including a first recess to be fitted to the convex portion; an adhesive bonding part of the surface of the head portion around the convex portion to the back surface of the light-transmitting member while the convex portion is fitted to the first recess and the first recess covers the through hole; a semiconductor light emitting element that emits light passing through the through hole for irradiation of the light-transmitting member; and an optical system condensing the light from the semiconductor light emitting element and locally irradiates the light-transmitting member with the light.

A light device with integration sheet is disclosed, which comprises: a light source; and at least a sheet, each being disposed at the light emitting end of the light source and comprising a plurality of light diffusion zones; wherein each light diffusion zone has a plural arrays of microstructures arranged on the surface thereof, and each array of microstructures is capable of changing the diopter of the corresponding light diffusion zone. By controlling the distribution of the plural arrays of microstructures, the Gaussian distribution of the light source can be improved while collimating the scattered light beams to the intended illuminating area of the lighting device and diffusing the light beams emitting from the center of the light source to the same so that not only the luminous efficacy of the lighting device is enhanced, but also the uniformity of the illuminance of the lighting device is improved.

A display apparatus includes a first pixel including a first pixel electrode connected to first data and gate lines, a second pixel including a second pixel electrode connected to a second data and gate lines, a third pixel including a third pixel electrode connected to a third data line and the first gate line, a fourth pixel including a fourth pixel electrode connected to a fourth data line and the second gate line, a fifth pixel including a fifth pixel electrode connected to a fifth data line and the second gate line, a sixth pixel including a sixth pixel electrode connected to a sixth data line and the first gate line, a seventh pixel including a seventh pixel electrode connected to a seventh data line and the second gate line, and an eighth pixel including an eighth pixel electrode connected to an eighth data line and the first gate line.

A backlight unit for a flat panel display and a flat panel display apparatus having the same. The backlight unit for a flat panel display displaying a predetermined image includes: a light source which emits light; a light guide panel having an incident surface facing the light source and which totally reflects light incident through the incident surface toward the flat panel display; and a holographic pattern that includes a plurality of diffraction gratings that are continuously repeated on at least one of an exit surface of the light guide panel and the opposing surface and diffracts light incident into the light guide panel. A depth of the diffraction grating progressively increases away from the incident surface along a length direction of the light guide panel. The backlight unit for a flat panel display and the flat panel display apparatus having the same have a simple structure that can acquire surface light using a holographic pattern while achieving uniform brightness distribution across the entire light-emitting surface.

A screen with an improved luminance uniformity is provided. A diffusion film that is disposed at the front surface of the screen is attached to a Fresnel lens with an adhesive. The Fresnel lens is attached to a reflective layer that is deposited on a base film with an adhesive that has a refractive index lower than that of the Fresnel lens and as low as possible.

The invention provides an intelligent anti-theft lock system comprising a processor, a camera module, an iris module, a fingerprint module, an input module, a door switch module, a doorbell module and a communication module. The camera module, the iris module, the fingerprint module, the input module, the door switch module, the doorbell module and the communication module are respectively connected with the processor. The system further comprises a communication terminal connected with the communication module. An intelligent anti-theft lock in the invention transmits unlocking matching information and unlocking person information collected by the camera module to a setting communication terminal in real time through the communication module, so as to learn about state information, visitors and the like, and to determine whether to be normal visiting or thief visiting, thereby improving the safety of doors.

The invention is related to an optical lens, a light-emitting diode optical component and a light-emitting diode illumination lamp. The optical lens formed as a semi-spherical shape includes an uplifting spherical surface and a bottom surface corresponding to the spherical surface, and the bottom surface includes an inward space concave to the spherical surface and formed with a free surface corresponding to the spherical surface. The free surface is axially-symmetrical formed as rotational molding with respect to an axis connected from the focus to a center point of the spherical surface, to form the free surface with a similar Gaussian distribution curve provided on a section vertically cut from the spherical surface to the bottom surface. A light-emitting diode is disposed below the focus of the optical lens. The special outline structure of the optical lens can provide a uniform luminance distribution on an illuminating area.

The invention discloses a rail fastener detection device based on machine vision, and relates to the technical field of railways. The rail fastener detection device has the technical key points that the rail fastener detection device comprises a detection beam, a linear array camera assembly, a light source assembly, an image acquisition card, a controller and a memory, wherein the camera assembly and the light source assembly are both installed on the detection beam; the camera assembly is used for collecting an image which contains a rail fastener; the light source assembly is used for providing luminance compensation for the camera assembly; the image acquisition card is used for acquiring image data output by the camera assembly and outputting the image data into the controller; the controller is used for storing the image data into the memory; the controller and the camera assembly are in signal connection; the controller is used for outputting a shutter trigger signal of a certain frequency to the camera assembly to control the camera assembly to carry out image shooting; the controller is also in signal connection with the light source assembly for controlling the luminance of the light source assembly.

One or more embodiments of the present invention provide apparatuses, methods and systems to form a thin LED backlight unit for a large-screen flat-panel display. The backlight unit is able to achieve improved color mixing within a shorter mixing distance than the conventional art, while maintaining desired brightness uniformity, thereby allowing for a shorter bezel of a display device. One or more embodiments of the present invention include one or more light guides, which, by operating together, provide thin backlight units. High system efficiency is provided by introducing a recycling enhancement component, and uniform color distribution is achieved by incorporating color shift compensation. Multiple light guides are arranged adjacent to one another can offer a progressive scan illumination feature.

A belt-like work (11) provided with a photosensitive layer is conveyed in a work conveying direction F at a work conveying speed V. An illuminating section (30) illuminates a photomask (29) in an exposure period T synchronized with the work conveying speed V. The photomask (29) is disposed at a proximity gap from the belt-like work (11). Mask pattens (33) on the photomask (29) are exposed on the belt-like work (11) to form periodic pattens thereon.

The present invention provides a liquid crystal display device of high quality having high brightness and uniform brightness distribution by focusing the light radiation direction from a light guide plate in the vertical direction with respect to a light radiation surface of the light guide plate. The liquid crystal display device includes a liquid crystal display panel and a flat lighting device which radiates an illumination light to a back surface of the liquid crystal display panel. The flat lighting device includes a light guide plate which has an upper surface facing a back surface of the liquid crystal display panel in an opposed manner and constituting a light radiation surface and a bottom surface which is arranged opposite to the upper surface. One LED is arranged at a first corner portion of the light guide plate and another LED is arranged at a second corner portion of the light guide plate arranged adjacent to the first corner portion. By forming reflection surfaces which are inclined toward the upper surface from the bottom surface of the light guide plate and inclined surfaces which abut on the reflection surfaces on the lower surface of the light guide plate, the light radiation direction from the light guide plate is focused in the vertical direction with respect to the upper surface of the light guide plate.

A reflector has a curved part covering the light source and a pair of end parts extending at the two sides of the curved part. The inside surface of each end part has a plurality of substantially parallel projections or depressions. The light-guiding plate has an incident surface and an emission surface substantially perpendicular to the incident surface, the incident surface having a plurality of projections or depressions extending substantially parallel to the emission surface. Also, the reflection surface of the light-guiding plate has projections.