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68results about How to "Ensure brightness uniformity" patented technology
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Cushion isolating material, liquid crystal panel, liquid crystal display device and preparation method of cushion isolating material
ActiveCN102998852AReduce anisotropyLow birefringencePhotomechanical apparatusNon-linear opticsLiquid-crystal displayColor film
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.
Owner:BOE TECH GRP CO LTD
Active matrix OLED driving circuit using current feedback
InactiveUS7876292B2Ensure brightness uniformityDifferenceCathode-ray tube indicatorsInput/output processes for data processingDigital dataWilson current mirror
An active matrix organic light emitting diode AMOLED driving circuit using current feedback that ensures the uniformity of brightness in pixels of a flat panel display and shortens the time required to input accurate current to respective pixels in the driving circuit.The prevent invention provides an AMOLED driving circuit using current feedback, comprising: a current digital-to-analog converter outputting a current corresponding to input digital data; a first differential amplifier connected to the current digital-to-analog converter and controlling the input data current and a driving current of a driving transistor of a pixel circuit to be identical to each other; a current mirror mirroring driving current of an organic light emitting diode of the pixel circuit to an input side of the first differential amplifier; and a second differential amplifier coupled to the current mirror and controlling charge and discharge speeds of parasitic capacitance of the pixel circuit.
Owner:IKAIST CO LTD
Identification method, compensation method and device for bright spot area of display panel
ActiveCN109903717AHigh precisionQuality improvementImage analysisStatic indicating devicesBright spotComputer science
The invention relates to a method for identifying a bright spot area of a display panel, which comprises the following steps of: acquiring brightness information of the display panel, the brightness information comprising a brightness value of each sub-pixel when the display panel displays at least two pictures with different gray scales; converting the brightness information into gray scale information, wherein the gray scale information comprises a gray scale value of each sub-pixel when the display panel displays at least two pictures with different gray scales; comparing the gray scale value of each sub-pixel with a target gray scale value to divide the display panel into a normal display area and an abnormal display area; obtaining the position of a sub-pixel polluted by dust in the abnormal display area; identifying a dust area polluted by dust in the abnormal display area according to the positions of the sub-pixels polluted by dust; and determining an actual bright spot area inthe abnormal display area according to the dust area. The invention also relates to a compensation method and device.
Owner:BOE TECH GRP CO LTD +1
Method of eliminating OLED display panel mura
ActiveUS20180102091A1Eliminate the problemImprove display qualityStatic indicating devicesSolid-state devicesEngineeringGrey level
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.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
Pixel drive circuit and method, array substrate and display device
ActiveCN104464638AAvoid the influence of luminous brightnessEnsure brightness uniformityStatic indicating devicesPower flowDisplay device
Owner:HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
Method of eliminating OLED display panel Mura
ActiveUS10121408B2Rapidly and effectively eliminateEnsure brightness uniformityStatic indicating devicesComputer scienceBrightness perception
The present invention provides a method of eliminating OLED display panel Mura. First, a corresponding calculation formula is selected by comparing the gamma value of the OLED display panel and the local gamma value at the present display gray scale, and the compensation gray scale which should be utilized is calculated, and then the OLED display panel is made to show the present compensation gray scale captured with the present calculation to determine whether the preset condition of ending the calculation of the compensation gray scale is achieved, and if the preset condition of ending the calculation of the compensation gray scale is not achieved, the iterative computation does not stop until the preset condition of ending the calculation of the compensation gray scale is achieved, which can rapidly and effectively eliminate the OLED display panel Mura to ensure the brightness uniformity of the OLED display panel.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
LED streetlamp reflector and streetlamp having LED streetlamp reflector
InactiveCN101769501AReduce wasteEasy to slidePoint-like light sourceOutdoor lightingEngineeringLED lamp
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.
Owner:ZHEJIANG JINGRI LIGHTING TECH
OLED display panel and manufacturing method thereof and OLED display device
ActiveCN108922918AEnsure brightness uniformityLower resistanceSolid-state devicesSemiconductor/solid-state device manufacturingAdhesiveDisplay device
The embodiment of the invention provides an OLED display panel and a manufacturing method thereof and an OLED display device. The OLED display panel includes an OLED display substrate and a packagingsubstrate which are arranged relatively. The OLED display substrate comprises a first substrate, a first electrode, a second electrode and an organic luminescence layer, wherein the first electrode, the second electrode and the organic luminescence layer are arranged in sequence on the first substrate. The packaging substrate comprises a second substrate and a conductive layer disposed on the second substrate. The surface provide with the second electrode of the OLED display substrate is bonded with surface provided with the conductive layer of the packaging substrate through bonding adhesive,wherein the bonding adhesive includes conductive particles. The conductive layer is electrically connected with the second electrode by the conducting particles. The OLED display panel and the manufacturing method thereof and the OLED display device enable the conductive layer and the second electrode to be electrically connected by including the conductive particles in the bonding adhesive, theentire electrode layer includes the conductive layer and the second electrode, the resistance of the entire electrode layer is reduced, the voltage drop is reduced, and the brightness uniformity of the OLED display panel is ensured.
Owner:BOE TECH GRP CO LTD
Image fusion method for dome screen system, and image fusion device thereof
InactiveCN108269231AEliminate color differencesUniform colorImage enhancementImage analysisProjection imageColor processing
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.
Owner:深圳市艺博堂文化科技集团有限公司
Liquid crystal display backlight device and liquid crystal display
InactiveUS8416363B2Suppress light quantity lossEnsure brightness uniformityPlanar/plate-like light guidesIlluminated signsLiquid-crystal displayLight guide
It is aimed to provide an LCD backlight device and liquid crystal display that can suppress light quantity loss and ensure uniform brightness.An LCD backlight device 101 has a laser light source 1 that emits laser light, and a light guiding plate 3 that transforms the laser light from the laser light source 1 into linear laser light, and transforms the linear laser light into a planar laser light, and emits the planar laser light, and the light guiding plate 3 has a third side face 6 that transforms the linear laser light into the planar laser light by reflecting the linear laser light by a plurality of reflection surfaces that are formed along the entrance direction of the linear laser light.
Owner:PANASONIC CORP
Backlight source and display device
InactiveCN103017040AEnsure brightness uniformityLight structureMechanical apparatusPoint-like light sourceLight guideDisplay device
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.
Owner:BOE TECH GRP CO LTD +1
Method for manufacturing lamp strip having improvement on central point luminance of each backlight module
InactiveCN102691922AIncrease the brightness of the center pointImprove optical gradePoint-like light sourceElectric lightingLuminous intensityEngineering
The invention provides a method for manufacturing a lamp strip having an improvement on the central point luminance of each backlight module. The method comprises the steps as follows: step 1, providing a PCB (printed circuit board) and multiple different specifications of LED lamps having different luminous intensities, wherein the differences of the luminous intensities of the LED lamps are smaller than 20%; step 2, placing the LED lamps at intervals on the PCB, and electrically connecting the LED lamps with the PCB; step 3, providing a backlight module body, and mounting a backlight source on the backlight module body to form a backlight module; step 4, placing the PCB provided with the LED lamps on the backlight module body and using as a backlight source, so as to form a backlight module; step 5, measuring the central point luminance and illumination uniformity of each backlight module; step 6, regulating the distances between the LED lamps on the PCB according to preset central point luminance and illumination uniformity, and enabling the central point luminance and illumination uniformity of each LED lamp on the PCB to meet the requirements; and step 7, fixedly mounting the LED lamps on the PCB to form the LED lamp strip.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Direct type backlight source of liquid crystal display screen
ActiveCN102434811AReduce in quantityLow cost requirementsPoint-like light sourceElectric lightingLiquid-crystal displayLarge screen
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.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
Display device and light emitting device
ActiveUS20150192275A1Minimized in sizeSpaceNon-electric lightingPoint-like light sourceLight fluxDisplay device
Disclosed is a display device. The display device includes light sources to generate light; light flux control members to refract the light; a drive substrate on which the light sources are mounted; a cover to cover the drive substrate; reflective portions disposed in at least one of the drive substrate and the cover to reflect the refracted light; and a display panel into which the reflected light is incident.
Owner:LG INNOTEK CO LTD
Fisheye camera shadow correction parameter determination method, correction method and device, storage medium, and fisheye camera
InactiveCN108307098AAvoid reflectionsAvoid occlusion effectsTelevision system detailsImage enhancementCorrection methodLightness
The invention discloses a fisheye camera shadow correction parameter determination method, a fisheye camera shadow correction method, a fisheye camera shadow correction parameter determination device,a fisheye camera shadow correction device, a storage medium and a fisheye camera. The fisheye camera shadow correction parameter determination method comprises the steps of: acquiring an original image of the fisheye camera, wherein the original image is shot when the fisheye camera is not provided with an outer shell; counting luminance information and chrominance information of the original image in each block; and calculating correction parameters of the fisheye camera according to the luminance information and chrominance information of each block. By adopting the methods and the devicesdisclosed by the invention, the correction effect of the fisheye camera in shadow correction can be improved.
Owner:SHANGHAI XIAOYI TECH CO LTD
AC (alternating current) high-voltage double-side LED lamp bar
InactiveCN103822134AReduce installation difficultyConvenient power supplyElectric lightingElectric light circuit arrangementEpoxyEngineering
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.
Owner:李忠训
Method of eliminating OLED display panel Mura
ActiveUS10083654B2Rapidly and effectively eliminateEnsure brightness uniformityStatic indicating devicesSolid-state devicesGrey levelComputer science
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.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Optical imaging system and target simulation system
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.
Owner:XIAN MICROMACH TECH CO LTD
LED area light source and display device
InactiveCN111211211APrevent running outEnsure brightness uniformitySolid-state devicesNon-linear opticsDisplay deviceEngineering
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.
Owner:INTERFACE TECH CHENGDU CO LTD +2
Pixel driving circuit, display panel, control method of display panel and display equipment
ActiveCN113409727AImprove the display effectReduced anode charge timeStatic indicating devicesDriver circuitHemt circuits
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.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Secondary light distribution method based on brightness
ActiveCN104791712AGlare GuaranteedGlare Index Requirements GuaranteeMechanical apparatusPoint-like light sourceVisual field lossIlluminance
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.
Owner:叶丹 +1
Calibration burning method and device for camera
ActiveCN107734328AHigh precisionEnsure brightness uniformityTelevision systemsVisual angleLight source
The invention discloses a calibration burning method for a camera. The method comprises the following steps of step 1.providing the camera and a calibration light source, wherein the calibration lightsource is provided with a light emitting surface, and the light emitting surface is a concave spherical surface; step 2.placing the camera on the center of sphere of the light emitting surface and shooting towards the light emitting surface, wherein the light emitting surface at least covers the visual angle range of the camera; and step 3.carrying out calibration burning on the camera. Accordingto the calibration burning method, when the calibration burning is carried out on the camera, the error of calibration parameters can be reduced to be helpful for improving the accuracy of calibration burning of the camera. The invention further discloses a calibration burning device for the camera.
Owner:TRULY OPTO ELECTRONICS
Image moire elimination method and device and LED display screen correction method
ActiveCN112233614AEnsure brightness uniformityGuaranteed accuracyStatic indicating devicesTime domainLED display
The invention provides an image moire elimination method and device and an LED display screen correction method. The image moire elimination method comprises the steps of acquiring a first correctionimage; generating an LED lamp point brightness graph according to the first correction image; converting the LED lamp point brightness map into a second correction image in the frequency domain; inputting the second correction image into a preset moire image recognition model, obtaining a confidence probability that each pixel point in the second correction image is a moire, and generating a confidence probability graph; filtering the second corrected image according to the confidence probability graph to generate a filtered image; and converting the filtered image into a third corrected imagein the time domain. According to the method, the moire in the image can be effectively recognized and eliminated, the moire in an LED correction image is eliminated before an LED display screen is corrected, when the LED correction image is used for correction subsequently, interference of the moire is avoided, the display effect after correction is optimized, and the problem that the brightnessof the LED display screen is uneven due to the moire is effectively solved.
Owner:SHENZHEN LIDING PHOTOELECTRIC TECH
LED (light-emitting diode) street lamp reflector
InactiveCN102519013AEnsure uniformity of illuminationEnsure brightness uniformityPoint-like light sourceOutdoor lightingIlluminanceRoad surface
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.
Owner:ADVANCED OPTRONIC DEVICES CHINA
Display module and display device
ActiveCN111738192AAvoid warpingImprove accuracyPrint image acquisitionInput/output processes for data processingLight sensingLight guide
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.
Owner:XIAMEN TIANMA MICRO ELECTRONICS
Light guide device, light source assembly and projection device
InactiveCN103529508AIncrease the lengthAvoid symmetric processingMechanical apparatusProjectorsLight guideOptoelectronics
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.
Owner:QISDA OPTRONICS (SUZHOU) CO LTD +1
Algorithm and device for improving lifespan of oled
InactiveCN106847176BExtend your lifeEnsure brightness uniformityStatic indicating devicesLower limitDriving current
The present invention discloses an OLED (Organic Light Emitting Diode) life improvement algorithm and device. According to an OLED brightness decay model, an OLED luminescent device life improvement algorithm is provided through combination of OLED actual hardware driving capability. The OLED luminescent device life improvement algorithm employs a method for improving driving current and voltage of the OLED when the brightness of the OLED decays to Lx when the OLED is lightened by an initial brightness L0 to improve the brightness of the OLED to Ly, and employs an optimization algorithm to obtain three optimal parameters, namely a value of brightness decay lower limit Lx, a Ly value and the number mbest of improvement times so as to effectively reach the purpose of prolonging the OLED life. The OLED life improvement algorithm and device discloses a device for realizing the OLED life improvement algorithm. The device comprises a calculation compensation data module, a calculation brightness data module, a storage brightness data module, a calculation decay degree module, a storage decay degree module and a detection determination module.
Owner:XI AN JIAOTONG UNIV +1
Interior trim atmosphere lamp assembly
InactiveCN110388598AMeet the installation requirementsMeet the requirements of optical structure designLight guidesVacuum evaporation coatingLight guideEngineering
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.
Owner:亿美汽车光电科技(长春)有限公司
Display compensation method and device and display device
ActiveCN112581909AEnsure brightness uniformityImprove the display effectStatic indicating devicesComputer hardwareDriving current
The invention provides a display compensation method and device and a display device. The display compensation method comprises the steps of: obtaining driving current of a display panel; determininga compensation weight according to the driving current, and determining a target gray-scale compensation parameter according to the compensation weight, the target gray-scale compensation parameter comprising a high gray-scale compensation parameter and a low gray-scale compensation parameter; and performing display compensation on the display panel according to the target gray scale compensationparameter. Therefore, the brightness uniformity of the high gray scale compensation is ensured while the low gray scale compensation is not influenced, the influence of the voltage drop phenomenon onthe display effect is overcome, and the display effect is improved.
Owner:BEIJING ESWIN COMPUTING TECH CO LTD
Backlight module and liquid crystal display device
ActiveCN108594527AEnsure brightness uniformityReduce manufacturing costNon-linear opticsLiquid-crystal displayLight source
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.
Owner:HUIZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
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