68results about How to "Ensure brightness uniformity" patented technology

The invention relates to a cushion isolating material which is arranged between a color film base panel and an array base panel of a liquid crystal panel. The cushion isolating material comprises a first component and a second component, wherein the first component comprises a first top part; the second component comprises a second top part; and the structures of the first top part and the second top part are matched concavely and convexly. Accordingly, the invention provides a preparation method of the cushion isolating material, the liquid crystal panel comprising the cushion isolating material, and a liquid crystal display device. The cushion isolating material can be used for effectively decreasing the stress between glass as a substrate in the liquid crystal panel, so that the anisotropy of the glass is decreased effectively, and the birefringence phenomenon of the glass is reduced. Therefore, the influence of the effective phase delay quantity (delta n*d) of the liquid crystal due to the phase delay quantity caused by the glass is eliminated, and the light leak of the liquid crystal panel is lightened correspondingly, i.e., the uniformity of luminance of light rays penetrating the liquid crystal panel is ensured, and the poor luminance effects such as a dark state Mura are decreased effectively. Consequently, the good display effect of the liquid crystal display device is realized.

Disclosed is a method of eliminating OLED display panel Mura. The compensation gray scale which should be utilized is calculated according to the target brightnesses, the actual brightnesses at the 255 gray scale of the respective sub pixels, and the local gamma value at the present display gray scale, and then the OLED display panel is made to show the present compensation gray scale captured at present to determine whether the preset condition of ending the calculation of the compensation gray scale is achieved, and if it is not achieved, the actual brightness of the sub pixel at the compensation gray scale is captured to calculate again for obtaining the local gamma value at the present display gray scale and the compensation gray scale which should be utilized next time, and the iterative computation does not stop until the aforesaid preset condition is achieved.

The invention provides a pixel drive circuit and method, an array substrate and a display device. A first drive assembly in the pixel drive circuit comprises a first switching unit, a first charging unit, a first drive unit and a first drive compensation unit. The first switching unit is switched on or off according to first scanning signals so as to control transmission of data signals. The first end of the first charging unit is connected with the second end of the first switching unit. The control end of the first drive unit is connected to the second end of the first charging unit, the first end of the first drive unit is connected to a first power source through a light-emitting device, and the second end of the first drive unit is connected to a second power source. The first drive compensation unit is used for generating preset voltages at the control end of the first drive unit when the first switching unit is switched on according to the first scanning signals, and currents flowing through the light-emitting device are irrelevant to threshold voltages of the first drive unit through the preset voltages. By the adoption of the technical scheme, the influences of the threshold voltages for driving transistors on light-emitting brightness are avoided, and brightness uniformity of the light-emitting device is guaranteed.

The invention relates to the technical field of LED streetlamps, in particular to an LED reflector and the structure of a streetlamp having the LED lamp reflector. The LED lamp reflector comprises a substrate, wherein the substrate is provided with a plurality of reflectors which are separated into two groups according to opening directions, the opening directions of a reflector group in one group of the reflectors are the same and the opening directions of the different reflector groups are opposite in the road direction; and each reflector group at least comprises one reflector. A light band with uniform brightness and less light loss can be formed on the road according to the invention.

The invention relates to an image fusion method for a dome screen system. The image fusion method for a dome screen system is characterized by determining the projection area of each projector by means of a mesh model of the dome screen body so as to enable each projector to have adjustability for the projection position; performing edge fusion on each projection area by means of polar coordinatesgeometrical correction processing, so as to enable the projection area image at different position and in different size to achieve the effect of accurate splicing; and respectively performing colorcalibration of the projectors and fusion band blanking operation of projection images by means of unified color processing and light leakage compensation processing, thus effectively avoiding color variation and luminance variation between each edge fusion image. By means of the steps provided by the image fusion method for a dome screen system, the stereo projection image on the dome screen bodycan achieve the display effect of complete frames, unified color and suitable luminance, and comfortable and perfect film watching experience can be brought to spectators. The image fusion device employing the image fusion method for a dome screen system can generate a standard fusion image with better display effect, and the dome screen system employing the image fusion method can have excellentprojection effect and can improve the film watching experience of spectators.

The invention provides a backlight source and a display device. The backlight source comprises multiple light sources and at least one light guide plate, wherein the light sources are embedded into the light guide plate and further arranged in various positions of the light guide plate respectively for the conduction of light emitted by the light sources into the light guide plate from various positions; the light sources can be arranged in the various positions of the light guide plate, so that the light guide plate is divided into multiple areas; as each area of the backlight source comprises one light source, multiple side incidence type backlight sources are formed; and the brightness can be adjusted according to the areas. Therefore, the backlight source not only can guarantee the brightness evenness of a whole backlight source system, but also has the advantages of lightness and thinness like a side incidence type backlight source structure.

The invention relates to a liquid crystal display screen, in particular to a backlight source of the liquid crystal display screen, especially a direct type backlight source. Specific to the defects brought by uniform LED distribution of the direct type LED backlight source in the prior art, the invention discloses a direct type backlight source of a liquid crystal display screen. In a technical scheme provided by the invention, the direct type backlight source of the liquid crystal display screen comprises a substrate, wherein LEDs are arranged on the substrate in a nonuniform manner. For the technical scheme provided by the invention, the LED distribution on the substrate of the direct type LED backlight source is regulated, the traditional uniform distribution technology is discarded, and on the premise of guaranteeing that the a screen luminance uniformity index meets a basic requirement (the screen luminance uniformity>70%), the number of LEDs can be reduced by about 5-15%, so that the requirements on energy saving, consumption reduction and cost reduction are met. The direct type backlight source disclosed by the invention is mainly applied to the liquid crystal display screen, particular a large-screen liquid crystal display screen.

The invention discloses an AC (alternating current) high-voltage double-side LED lamp bar. The AC high-voltage double-side lamp bar comprises an elongated bar-shaped transparent cover, protecting caps and an LED lamp bar body, wherein the protecting caps are fixed at two ends of the transparent cover, and the LED lamp bar body is fixed in the transparent cover. The LED lamp bar body comprises an FR-4 epoxy resin circuit board and LED lamps, wherein the FR-4 epoxy resin circuit board is provided with an alternating-current and direct-current conversion circuit, and the LED lamps are arranged on the front side and the back side of the FR-4 epoxy resin circuit boards. Meanwhile, waterproof heat-conduction silica gel is filled in the protecting caps. The AC high-voltage double-side LED lamp bar is skillful in design, simple in structure, convenient to realize and low in cost, is remarkably higher in comprehensive performance as compared with the prior art, and has good market prospect.

The invention is suitable for the optical technology field and provides an optical imaging system and a target simulation system. The system comprises a polarization light splitting device, a miniature display module, a first polarized light source module and a second polarized light source module, wherein the polarization light splitting device is formed through gluing one pair of rectangular prisms, and a light splitting surface is formed at the bonding position of the rectangular prisms; the miniature display module is formed through splicing two same miniature displays; the first polarizedlight source module and the second polarized light source module are arranged on two adjacent equivalent focal planes of the polarization light splitting device; the P light of the first polarized light source module is vertically emitted into the polarization light splitting device and completely passes through the light splitting surface; the S light of the second polarized light source moduleis vertically emitted into the polarization light splitting device and is reflected at a 45 degree angle on the light splitting surface; the emitting directions of the S light and the P light form a 90 degree angle; and the P light and the S light finally generate an image in the miniature display module. In the invention, through an optical splicing technology, the resolution of the optical imaging system is increased, simultaneously, the size of the optical imaging system is reduced and weight is mitigated.

The invention relates to an LED area light source and a display device. The LED area light source comprises an LED lamp panel, a light-emitting layer and a reflection enclosing wall; the LED lamp panel comprises a light-emitting area; the light-emitting layer comprises an LED chip; the LED chip is arranged in the light-emitting area of the LED lamp panel; the reflection enclosing wall comprises reflection particles and a first transparent plastic base material; the reflection particles are distributed in the first transparent plastic base material; the reflection enclosing wall is tightly arranged on the periphery of the light-emitting layer in a surrounding mode and used for reflecting light emitted away from the light-emitting area. According to the LED surface light source and the display device of the invention, the reflection enclosing wall is tightly arranged around the periphery of the light-emitting layer in a surrounding manner; the reflection enclosing wall can reflect and recover the light emitted away from the light-emitting area; the path of the emitted light is changed; the LED light around the light-emitting area is prevented from running outwards; the brightness uniformity of the whole LED area light source is guaranteed; and the problem that the brightness of the periphery of the LED lamp panel is lower than the brightness of the center of the LED lamp panel issolved.

An embodiment of the invention relates to a pixel driving circuit, a display panel, a control method of the display panel and display equipment. The pixel driving circuit comprises a plurality of driving modules, wherein each driving module is used for driving a light emitting device connected with the driving module; each driving module comprises an anode reset unit, a driving transistor, and a target metal wire used for connecting the anode reset unit and light-emitting devices; the control end of each anode reset unit is used for receiving a first scanning signal, the input end of the anode reset unit is used for receiving a first reset voltage, and the output end of the anode reset unit is respectively connected with a first electrode of the corresponding driving transistor and an anode of the corresponding light-emitting device; and the first reset voltage received by the input end of each anode reset unit is positively correlated with the length of the corresponding target metal wire. Therefore, the influence of RC load generated by the metal wire on the lighting time of each light-emitting device can be reduced, the brightness uniformity of the light-emitting devices in the first display area is ensured, and the display effect is ensured to be improved.

The invention relates to a secondary light distribution method based on brightness. According to the secondary light distribution method based on brightness, a mathematical model is established at first according to road surface lighting requirements, and light distribution in an image space is solved; next, another mathematical model is established, and a surface shape of a lens is solved; finally, a light distribution effect is verified through simulation. By the adoption of the secondary light distribution method based on brightness, all the road lighting indexes related to driving and road safety are taken into account, brightness, brightness uniformity index requirements and glare index requirements serve as design starting points, an illuminance index is considered at the same time, different light distribution space curves are set according to different road surface requirements and a simplified brightness coefficient table recommended by CIE144-2001, therefore, free light distribution is achieved, brightness uniformity in the driving direction on a road surface and glare avoidance in the visual field range of a driver are guaranteed, and the requirements of owners and uses are simultaneously met.

The invention discloses an LED (light-emitting diode) street lamp reflector which comprises a plurality of reflector modules. Each reflector module comprises a base; the upper surface of the base is provided with a light receiving reflecting surface; a light polarizing plate is vertically arranged on the base; the surface of the light polarizing plate, which is opposite to the light receiving reflecting surface, is provided with a light polarizing reflecting surface; the light receiving reflecting surface and the light polarizing reflecting surface are both arc-shaped curved surfaces; and the light receiving reflecting surface is perpendicular to the light polarizing reflecting surface. The light receiving reflecting surface of the LED street lamp reflector is perpendicular to the light polarizing reflecting surface, and an LED light source with a disposable bimodal lens is arranged on a limiting hole of the base, the asymmetrically distributed light can be formed in the road width direction, and more light rays can irradiate one side of a lane so that the road illuminating light flux utilization of an LED street lamp can be improved. When the LED street lamp reflector is used for illuminating the road, more light rays can irradiate the lane so that the illuminance of the surface of the lane can be improved. The LED street lamp reflector can be used easily and flexibly and has high illuminance and high uniformity of illuminance.

The invention discloses a display module and a display device, and relates to the technical field of display, and the display module comprises a display panel which comprises a display region and a non-display region at least partially surrounding the display region; a backlight module which is located on the side, away from the light emitting face of the display module, of the display panel and comprises a substrate, a light guide plate, a first reflecting layer and a second reflecting layer; and a light sensing element which is located on the side, away from the display panel, of the backlight module. Due to the fact that the first reflecting layer is provided with the first through hole, a large gap is formed between the light guide plate and the first reflecting layer, an uneven air layer can be prevented from appearing between the first reflecting layer and the light guide plate, the generation of Newton rings is effectively restrained, and the accuracy of optical fingerprint recognition is improved. Besides, the backlight module further comprises a second reflecting layer, the second reflecting layer covers the first through hole, light supplementing can be conducted on the fingerprint recognition area, it is avoided that after part of the first reflecting layer is removed, the display brightness of the area is reduced, and the brightness uniformity of the display deviceis guaranteed.

The invention provides a light guide device, a light source assembly and a projection device. The light guide device extends along the straight line direction and comprises a light entering surface, a light emitting surface opposite to the light entering surface, and side walls, wherein a first center axis vertical to the light emitting surface is defined by the center of the light emitting surface; the first center axis does not pass through the center of the light entering surface; and the side walls are used for connecting the light entering surface and the light emitting surface. According to the invention, the evenness of the luminance of the output light of the light guide device can be guaranteed, and the luminance loss of the output light can be avoided.

The invention relates to an interior trim atmosphere lamp assembly, wherein a lower decoration ring body of the assembly is clamped and fixed to an interior trim body, an upper decoration ring body and the lower decoration ring body are clamped and buckled together, and an annular space is formed between the upper decoration ring body and the lower decoration ring body; a light guide comprises a light conducting segment and an annular light emitting segment, the annular light emitting segment is disposed in the annular space between the upper decoration ring body and the lower decoration ringbody, one surface of the annular light emitting segment close to the lower decoration ring body is a reflecting surface, and a portion close to the upper decoration ring body is a light emitting surface; and a light source is installed on the interior trim body, and a light emitting center of the light source is aligned with the end part of the axial line of the light conducting segment. The interior trim atmosphere lamp assembly provided by the invention can be applicable to an air outlet in an automobile, and can also be applicable to door guard plate atmosphere lamps, instrument board atmosphere lamps, reading lamp atmosphere lamps, auxiliary instrument board atmosphere lamps, seat back plate atmosphere lamps and side atmosphere lamps, and so on.

The invention provides a backlight module and a liquid crystal display device. The backlight module comprises a back plate, a collimating mirror arranged on one side of the back plate, a diffusing lens opposite to the collimating mirror as well as a light source arranged between the diffusing lens and the collimating mirror, wherein the light source is an LED (light emitting diode), light rays emitted by the light source are shot to the back plate in a collimating manner by means of the collimating mirror, the light rays shot to the back plate are diffused to the left and right sides of the back plate by means of the diffusing lens, the light rays shot to the back plate are reflected by the back plate, the light rays are diffused on the upper and lower sides of the back plate, further, thelight rays emitted by the light source are uniformly diffused to the display panel, and the brightness uniformity of the backlight module can be guaranteed under the condition that the single LED istaken as the light source.