45results about How to "Ensure uniformity of light" patented technology

The invention provides a backlight module. The backlight module comprises a back plate, a light guide plate arranged in the back plate, and a plurality of elastic bodies mounted on the back plate, wherein the back plate includes a bottom plate, and a plurality of side plates vertically connected at the periphery of the bottom plate; the light guide plate includes a bottom surface facing the bottom plate, a top surface away from the bottom plate, and a plurality of side surfaces connected between the bottom surface and the top surface; the plurality of elastic bodies are respectively mounted on the three side plates of the back plate, and butt against the three side surfaces of the light guide plate; and the contact surface between the elastic bodies and the side surfaces of the light guide plate is an arc-shaped surface or a spherical surface. The backlight module provided by the invention can ensure the mechanical strength of the light guide plate by fixing the light guide plate in the back plate through the elastic bodies between the side plates of the back plate and the light guide plate without processing the periphery of the light guide plate by grooving, embossing and so on, and can supply a certain buffer space to prevent extrusion deformation of the light guide plate due to thermal expansion in the prior art, thereby ensuring the luminous intensity and uniformity and reducing the cost.

The invention discloses a wavelength conversion device and a light-emitting device. The wavelength conversion device comprises a cavity, wherein at least partial inner surface of the cavity is a reflection inner surface, and a wavelength conversion layer is arranged on the reflection inner surface; the cavity comprises a light inlet and a light outlet, wherein the light inlet is used for receiving incident exciting light, the exciting light is incident to the cavity to excite the wavelength conversion layer on the reflection inner surface and enables the wavelength conversion layer to emit excited light, and the exited light finally is emergent from the light outlet; the sum of areas of the light inlet and the light outlet is smaller than area of the rest of the inner surface of the cavity; positions of the light inlet and the light outlet are not opposite. The wavelength conversion device is adopted, so that the exciting light and the excited light are emergent after being sufficiently reflected in the cavity; moreover, the exciting light cannot be directly project to the light outlet from the light inlet, so that the light-outlet uniformity of the light outlet is effectively guaranteed.

A light-emitting sign device is provided, in which optimum scattering of light from a light source is ensured, light loss can be reduced to a minimum, uniform and bright emission is made possible, and visibility and cost efficiency are improved. A sign plate having a sign surface is provided, and a light-diffusing plate, light guide plate, and white reflecting plate are arranged in this order on the rear surface of the sign plate. A light-scattering layer that scatters the light from the light source is coated on the rear surface of the light guide plate. The light-scattering layer has a binder layer composed of a coating composition using a transparent resin as a binder. A filler in the form of transparent and substantially spherical fine particles of silica is uniformly dispersed in the binder layer.

The invention provides a backlight module which comprises a back plate, a light guide plate arranged in the back plate, a lamp bar arranged on one side of the light guide plate, a lateral reflection piece arranged on one side of the light guide plate far away from the lamp bar and four corner pieces arranged between the back plate and the light guide plate. The corner pieces are manufactured by rubber materials, the surface of the corner pieces toward the light guide plate is white, the lateral reflection piece is located between two corner pieces, and the length of the lateral reflection piece is smaller than or equal to that between the two corner pieces and further achieve separation of the lateral reflection piece and the corner pieces. The lateral reflection piece and the corner pieces used for locating the light guide plate are arranged in separation mode, separation of the light guide plate and the lateral reflection piece caused by friction between the lateral reflection piece and the corners pieces in the prior art is avoided, and corner light leakage caused by separation of the light guide plate and the lateral reflection piece is further avoided. The backlight module further ensures light intensity and light evenness of the backlight module and improves quality.

The invention provides a backlight module and a liquid crystal display comprising the backlight module. A liquid crystal box array substrate in the prior art serves as a light guide plate, and therefore the liquid crystal display is further thinner and the production cost is reduced. A first refractor and a second refractor are deposited on the light guide plate, the refractive index of the first refractor is larger than the light guide plate and the second refractor, and therefore the light conducts total reflection on the second refractor and a faying surface of the first refractor, a good full reflection effect is achieved, and light leakage phenomenon is reduced and out-light uniformity in all positions in the crystal liquid display is guaranteed. Besides, the first refractor and the second refractor replace a low refractive index film and the manufacture cost of the backlight module is saved.

The invention provides a light processing device, a vehicle lamp with the light processing device and a vehicle provided with the vehicle lamp. The light processing device comprises a body, a light entering face and a light outgoing face, wherein the light entering face and the light outgoing face are arranged on the body. The body comprises a light diffusion part, a light collimation part and a light reflecting part, wherein the light diffusion part is used for diffusing light entering the light diffusion part through the light entering face, and the light entering face is arranged on the light diffusion part; the light collimation part is arranged on a transmission route of the diffused light and used for collimating the diffused light; the light reflecting part comprises a light reflecting face and a light outgoing part fixedly connected with the light reflecting face, an angle is formed between the collimated light and the light outgoing part, and the collimated light is transmitted by the light outgoing part and emitted out through the light outgoing face after being reflected by the light reflecting face. According to the light processing device, the vehicle lamp and the vehicle, a light face of the light is expanded through the light diffusion part, the emitted-out light is more even through the collimation processing of the collimation part and the processing of the light reflecting part, and the light outgoing effect is improved.

The invention provides a screen, a method for making an area light source and a method for making a direct type backlight module. The screen comprises a plurality of openings and a plurality of communicating holes, wherein the plurality of openings are formed at intervals; the plurality of communicating holes are respectively communicated with adjacent openings formed in a scrape coating directionof a scraper; when solder paste is coated, the solder paste height between two openings adjacent to the communicating hole can be balanced by the communicating hole, and the coating uniformity of thesolder paste is effectively ensured. The screen is used in the method for making the area light source, the communicating hole is formed between every two adjacent openings formed in the scrape coating direction of a scraper in the screen, and the moving direction of the communicating hole is the same as the scrape coating direction of the scraper, so that the solder paste amount on a bonding padof a MINI LED substrate is balanced by utilizing a principle of a similar connector, and the contact surface between the subsequent solder paste and a MINI LED chip is flat and uniform. Therefore, the arrangement uniformity and emergence uniformity of subsequent MINI LED chip arrangement are ensured, and the brightness uniformity of the whole area light source surface is improved.

A microluminescent device and a display thereof are disclosed, the microluminescent device includes, from bottom to top: a micro light emitting diode having a light emitting semiconductor sequence that generates light of a first wavelength after excitation, A transparent adhesive layer, an antireflective antireflective film, and a light emitting layer excited by light of a first wavelength to generate light of a second wavelength, thereby realizing a microluminescent device having high efficiency and emitting only light of a second wavelength, solving the problem that the brightness of a red-light microluminescent diode in the field of microdevices does not meet the demand, and through combination with microluminescent devices of other wavelengths, a display is formed.

The present invention relates to a prism sheet, a backlight module unit and a liquid crystal display device. One surface of prism sheet comprises a plurality of light collecting units. The plurality of light collecting units comprise a plurality of light radiating surfaces which comprises a plurality of micro-structures for diffusing light. The light radiating homogeneity degree of prism sheet is high.

The invention provides a light guide plate and a backlight mould provided with the same. The light guide plate comprises a body and a metal layer arranged on the body, wherein the body comprises a bottom surface and a top surface corresponding to the bottom surface as well as a plurality of side faces positioned between the bottom surface and the top surface; and the metal layer is arranged on at least one side edge of the top surface, and the difference of the reflectivity of the metal layer on light with the wavelength of 380-780mm is less than 20%. In the light guide plate provided by the invention, the metal layer is arranged on the top surface, thus the light which is shined from the light-inlet surface of the light guide plate and spread to the top surface of the light guide plate is reflected back to the light guide plate, so that the light can spread in the light guide plate, the light leakage is prevented, and then the illumination intensity and uniformity of the light guide plate are guaranteed; and the manufacture is simple, and the cost is low.

The invention discloses a light-emitting diode (LED) fluorescence lampshade. The LED fluorescence lampshade is characterized in that liquid stateful epoxy resin or silica gel serves as basic materials, yellow fluorescent powders serve as filling materials, the proportion is that 0.3-10 parts by weight of the yellow fluorescent powders are added into every 100 parts by weight of the basic materials so that raw materials for preparing the fluorescence lampshade are formed, wherein the raw materials are used for manufacturing the fluorescence lampshade, then the needed formative fluorescence lampshade is formed after injection moulding and solidifying demoulding are conducted. The grain sizes of fluorescent powder grains are 5-25 micrometers. The epoxy resin is double epoxy resin. The LED fluorescence lampshade has the advantages of being simple in moulding process, good in light transmission homogenization and long in service life.

The invention discloses a display module and a display device, and belongs to the technical field of display. The display module comprises a backlight module and a photosensitive element; the backlight module at least comprises a first light emitting area and a second light emitting area; the photosensitive element and the second light emitting area are overlapped in the direction perpendicular to the light emitting surface of the backlight module; in the second light emitting area, the backlight module comprises a second light source assembly and a second light guide plate; the second light source assembly is a side entry type light source assembly; the second light guide plate comprises a first side and a second side in the direction perpendicular to the light emitting surface of the backlight module; and the first side of the second light guide plate comprises a plurality of first lattice points, and the second side of the second light guide plate is of a plane structure. The display device comprises a display panel and the display module. The light-emitting brightness of the second light emitting area can be improved, and the light-emitting uniformity is ensured; and the use effect of the photosensitive element in the second light emitting area can be improved when the photosensitive element is used.

The invention relates to a backlight module and an LCD device adopting the backlight module. The backlight module comprises a frame and at least two optical elements, wherein, the frame includes a side frame which includes at least two containing grooves with an interval arrangement, and the two optical elements which include at least a lug respectively are contained in the frame, besides, the lugs are contained correspondingly in the two containing grooves. The assembly identification level of the backlight module and the LCD device adopting the backlight module of the invention is very high.

The invention discloses a method for manufacturing white light LED light sources. The white light LED light sources are made of LED chips and a fluorescent piece. The method for manufacturing the white light LED light sources comprises the following steps of dividing the LED chips into a plurality of grades according to the wave length of the LED chips, cutting the fluorescent piece into a plurality of fluorescent piece subunits, using the LED chips of all the grades as excitation light sources respectively, carrying out photochromic performance tests on the fluorescent piece subunits, selecting the fluorescent piece subunits matched with the LED chips of all the grades, and packaging mutually matched LED chips and the fluorescent piece subunits to form the white light LED light sources. The method for manufacturing the white light LED light sources can ensure the matching between the fluorescent piece subunits and the LED chips, and guarantees the uniformity of light emitted by the white light LED light sources, therefore, the qualified rate of products is improved, and production cost is reduced.

The invention provides a backlight module and a display device. The backlight module comprises a substrate, a plurality of light-emitting units, a light guide layer and a light reflecting layer. The design of the ultrathin flexible backlight module is achieved, and it is guaranteed that the overall thickness of the backlight module does not exceed 0.3 mm; a direct type light emitting mode is adopted, it is guaranteed that backlight has good visual angle uniformity when bent at different angles, no uniform light film structure exists in the backlight module, a net point structure is manufactured on the surface film surface of the lamp panel, light emitting uniformity at different positions of the front face is achieved through the combined action of the optical waveguide and the net point structure, the thinning of backlight and the light emitting uniformity of the whole surface are guaranteed, the light emitting uniformity and the bending characteristic of the backlight are considered, the light emitting uniformity of the whole surface is achieved, meanwhile, the overall lighting effect of the lamp panel can be improved, and the ultrathin flexible backlight with the higher lighting effect is achieved.

The invention relates to the technical field of backlight, in particular to a light guide plate, a backlight source module and a display device which are used for solving the problem of non-uniform light rays emitted by the conventional light guide plate due to the distribution design of a light emitting strip in the prior art. The light guide plate in the embodiment of the invention comprises a light guide main body part and a light emitting part positioned on one surface of the light guide main body part, wherein the light emitting part comprises a plurality of optical units arranged in the light guide direction; the lengths of the optical units in the light emitting part in the light guiding direction are unequal; each optical unit corresponding to a position where the light emitting strip is designed is shorter than an optical unit corresponding to a position where the light emitting strip is not designed, and one end surfaces, away from the light incident side of the light guide plate, of the optical units are flush with one another. Therefore, the light guide performances of the optical units at the light incident side of the light guide plate are ensured to be nearly consistent, the uniformity of scattering and reflection is improved, the light guide performances are improved, the light emitting uniformity of the light guide plate is ensured, and the quality of the light guide plate is improved.

In the present invention, there is provided a lighting device including: a light source module including at least one light source and a light guide member that buries the light source; a shielding module accommodating the light source module therein, the shielding module having an opening region and a shielding region, which are provided above the light guide member; and a diffusion member disposed in the light guide member.

Disclosed are a light emitting device, a lamp and a projection display device. The light emitting device comprises a wavelength conversion device which comprises a perforated substrate and a wavelength conversion layer attached to the inner wall of a hole. The light emitting device also comprises a laser source and a light processing element. A laser emitted from the laser source is incident on the light processing element and processed, and the angular distribution of the laser is in the first angular range, so that the laser can all be incident on the wavelength conversion layer of the inner wall of the hole and the wavelength conversion layer is excited to emit a stimulated laser. The light processing element enables all of the laser to be incident on the wavelength conversion layer of the inner wall of the hole without direct injection from the hole, so that the luminous efficiency and uniformity can be guaranteed. At the same time, the size of the hole limits the size of the aperture of the emitted light, small holes can make the exit light spot become small, and the luminous flux is prevented from being affected, so that relatively higher brightness can be achieved.

The invention discloses an optical assembly, a backlight module and a display device. The optical assembly comprises a light guide plate, at least one first light source and at least one second light source. At least one avoiding hole penetrating to the top is formed in the bottom of the light guide plate; the first light sources are arranged at the bottom of the light guide plate, and each first light source is opposite to one avoiding hole; the second light source is arranged on the side edge of the light guide plate, and the light-emitting surface of the second light source faces the side edge of the light guide plate. According to the technical scheme, the problems that the overall brightness of a side-in type display device is not high, and the overall picture of a direct-down type display device is not uniform can be solved.

The invention relates to a manufacturing method of a white light LED chip, comprising the following steps: S1, providing an LED epitaxial and fluorescent plate; 2, mounting that fluorescent plate on the LED epitaxy to obtain a white LED epitaxy with a growth substrate; 3, stripping that growth substrate to obtain white LED epitaxy to be formed; S4, arranging an electrode- to obtain a molded whiteLED chip. The invention provides a white LED epitaxial manufacturing method, The LED epitaxial light-emitting layer is mounted on the fluorescent plate, and the formed white LED chip can emit white light directly, and the fluorescent plate is made of high-temperature resistant transparent material and fluorescent powder, and the high-temperature generated in the working process will not affect thereliability of the fluorescent plate, and the LED chip can be made into high-power LED chip. On the other hand, the luminescence principle of the white light LED chip is that the monochromatic lightLED chip excites phosphor to form white light, the production cost is low, the package is not needed, the excitation efficiency is high, the wavelength is continuous, and the color reducibility is high.