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33results about How to "Reduce uneven brightness" patented technology
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Edge-lighting backlight module and light guide element and linear light source thereof
InactiveCN101666462AReduce usageReduce damage rateMechanical apparatusPoint-like light sourceLight guideOptoelectronics
The invention provides an edge-lighting backlight module and a light guide element and a linear light source thereof. The edge-lighting backlight module comprises at least one point light source, thelight guide element and a flat light guide plate, wherein the light guide element comprises a plurality of microstructures to destroy the total reflection of light in the light guide element and makethe light uniformly transmit out of the light guide element; and the spacial distribution of the plurality of microstructures depends on the light distribution of the at least one point light source on the light guide element, so the at least one point light source is converted into a linear light source with uniform emergent light. Therefore, the flat light guide plate can reflect the light of the linear light source to form an area source with uniform emergent light. The edge-lighting backlight module can reduce the number of parts and strengthen heat dissipation, and can avoid the conditions of non-uniform brightness.
Owner:ZHANJING TECH SHENZHEN +1
Fresnel lens and lighting apparatus provided with the fresnel lens
InactiveUS20060056185A1Enhance the stage effectReduce uneven brightnessLighting applicationsMechanical apparatusFresnel lensOptical axis
In a Fresnel lens which is made of a lens material whose refraction index is n, and focuses light beam from a light source at a specified radiation view angle φ, and has plural N pieces of circular lens surfaces arranged concentrically around a common optical axis, and plural circular rise surfaces arranged adjacent alternately between these lens surfaces, and two lens surfaces adjacent via at least one of the rise surfaces are concave surfaces, and tangent lines and at the intersecting point with the rise surfaces of the shape of a cross section passing through the optical axis of those lens surfaces intersect at the outside with respect to the optical axis, and when the angle formed between these tangent lines is defined as θ, a relational equation θ≧φ / (2 n N) stands.
Owner:KK TOSHIBA
Lighting device and display device
ActiveUS20180045878A1Reduce uneven brightnessMechanical apparatusPlanar/plate-like light guidesLight guideDisplay device
A backlight device 12 includes a light guide plate 14, LEDs 17, and wiring portions 18c. The light guide plate 14 has a substantially circular outer shape and has fan-shaped areas SA defined by segment lines SL extending through a center C thereof. All the segment lines SL meet at the center C. The LEDs 17 include sets of LEDs 17 provided for the fan-shaped areas SA. The LEDs 17 are arranged such that middle positions between LEDs 17 each located at an end in the circumferential direction in the respective sets of the LEDs 17 provided for the fan-shaped areas SA adjacent to each other in the circumferential direction coincides with the segment lines SL. The wiring portions 18c are equal or larger in number than the LEDs 17 included in each of the sets of LEDs 17 provided for the fan-shaped areas SA and are configured to supply electric power to the respective LEDs 17 provided for the fan-shaped areas SA.
Owner:SHARP KK
Spread illuminating apparatus adapted to allow light to exit out from both surfaces of light conductive plate
InactiveUS7111974B2Increase brightnessReduce uneven brightnessMechanical apparatusPoint-like light sourceLight guideOptoelectronics
A spread illuminating apparatus for illuminating two objects includes: at least one light source; a light conductive plate having the at least one light source at an end surface thereof and defining first and second major surfaces from which light emitted from the at least one light source and introduced in the light conductive plate exits out respectively toward two objects to be illuminated; an optical sheet unit consisting of a diffuser sheet and condenser sheets, and disposed on at least the second major surface so as to cover an entire area thereof; and a reflecting means having a smaller surface area than the second major surface, and disposed directly on top of the optical sheet unit.
Owner:MINEBEA CO LTD
Display unit operating control method, display control method, and display apparatus
ActiveUS20040076018A1Reduce uneven brightnessIncrease in circuit sizeAircraft componentsStatic indicating devicesElectrical conductorTime segment
Owner:SHARP KK
LED array capable of reducing uneven brightness distribution
InactiveUS20130050653A1Reducing uneven brightness distributionReduce uneven brightnessVehicle headlampsLighting and heating apparatusLed arrayActive layer
A semiconductor light emitting array comprises a plurality of semiconductor light emitting elements disposed on an oblong substrate that is long in a first direction and arranged along with the first direction. Each light emitting element comprises an electrode layer formed on the substrate, a semiconductor light emitting layer formed on the electrode layer, stretched long in the first direction and comprising a p-type semiconductor layer, an active layer and an n-type semiconductor layer, a first wiring layer formed along and in parallel to one long side of the semiconductor light emitting layer, and second wiring layers extending to a direction of a short side from the first wiring layer and electrically connected to the n-type semiconductor layer on a surface of the semiconductor light emitting layer. The first wiring layers are disposed on different long sides of the semiconductor light emitting layers in the adjacent light emitting elements.
Owner:STANLEY ELECTRIC CO LTD
Illuminator
ActiveUS20160091653A1Reduce uneven brightnessReduce brightnessMechanical apparatusOptical signallingLight guide
Owner:HONDA MOTOR CO LTD +1
Display device and dimming method thereof
ActiveCN103680391AReduce uneven brightnessAvoid uneven brightnessStatic indicating devicesCapacitanceCritical voltage
The embodiment of the invention provides a display device and a dimming method thereof. The display device comprises a light emitting diode and a driving module, wherein the driving module is used for driving the light emitting diode; the driving module comprises a first switch circuit, a second switch circuit and a driving transistor; the first switch circuit is used for selectively writing gray scale voltage into a first capacitor; the second switch circuit is used for selectively writing compensation voltage into a second capacitor; the driving transistor is respectively coupled with the light emitting diode, the first capacitor and the second capacitor; the driving transistor is controlled by the gray scale voltage and the compensation voltage so as to adjust driving current output to the light emitting diode; the gray scale voltage is used for adjusting the voltage difference of the grid and the source of the driving transistor; the compensation voltage is used for adjusting critical voltage of the driving transistor.
Owner:INNOCOM TECH SHENZHEN +1
Backlight module and liquid crystal display device
ActiveCN102943981AReduce uneven brightnessLighting heating/cooling arrangementsOptical light guidesLiquid-crystal displayEngineering
The invention discloses a backlight module and a liquid crystal display device. The backlight module comprises a back plate, a heat source and a heat isolation mechanism. The heat source and the back plate are oppositely fixed arranged, the heat isolation mechanism is arranged in a heat transfer line between the back plate and the heat source and separates heat coming from the heat source and transmitted to the back plate. By arranging the heat isolation mechanism in the heat transfer line between the heat source and a liquid crystal panel, heat of the heat source is prevented from being transmitted to the liquid crystal panel, and accordingly brightness unevenness caused by overheat of the liquid crystal panel is reduced.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
Illuminating device and display device provided with same
ActiveUS20140016349A1Uneven brightness of light emittedLower display costsMechanical apparatusLight guides for lighting systemsDiffusionLiquid-crystal display
The present invention allows light leaked to outside of a light guide plate (50) from a surface area L to pass through a diffusion sheet (70) by covering both the bottom of an optical sheet (75) and the surface area L of the light guide plate (50) located between an LED FPC (25) and the optical sheet (75) with the diffusion sheet (70). This irradiates a liquid crystal display panel (30) with light after the light leaked to outside from the surface area L is diffused by the diffusion sheet (70), so unevenness in the brightness of backlight emitted from a backlight device (240) can be reduced. Thus, the brightness of images displayed on a screen can be made uniform regardless of distance to an LED (60).
Owner:SHARP KK
Led array capable of reducing uneven brightness distribution
ActiveCN102956785AReduce uneven brightness distributionReduce uneven brightnessVehicle headlampsPoint-like light sourceLed arrayActive layer
The present invention relates to an LED array capable of reducing uneven brightness distribution. A semiconductor LED array comprises a plurality of semiconductor LED elements disposed on an oblong substrate that is long in a first direction and arranged along with said first direction. Each LED element comprises an electrode layer formed on the substrate, a semiconductor LED stack formed on the electrode layer, stretched long in the first direction and comprising a p-type semiconductor layer, an active layer and an n-type semiconductor layer, a first wiring layer formed along and in parallel to one long side of the semiconductor LED stack, and second wiring layers extending to a direction of a short side from the first wiring layer and electrically connected to the n-type semiconductor layer on a surface of the semiconductor LED stack. The first wiring layers are disposed on different long sides of the semiconductor LED stacks in the adjacent LED elements.
Owner:STANLEY ELECTRIC CO LTD
Display panel and display device
ActiveCN112952021AImprove brightness uniformityReduce the cathode step differenceSolid-state devicesSemiconductor/solid-state device manufacturingDisplay deviceEngineering
The invention discloses a display panel and a display device. The display panel comprises a first display area and a second display area, the light transmittance of the first display area is larger than that of the second display area, in the first display area, and the display panel comprises pixel areas and light-transmitting areas located between the pixel areas. The display panel comprises: a light-emitting unit layer; an auxiliary layer comprising at least one auxiliary part, wherein the auxiliary part is located in the corresponding light-transmitting area; and a first electrode layer arranged on the light-emitting unit layer and the auxiliary layer. The auxiliary part comprises a platform part and an edge part located at the edge of the platform part, the first electrode layer covers the light-emitting unit layer and at least part of the edge part, and the thickness of the first electrode layer located on the edge part is smaller than that of the first electrode layer located on the light-emitting unit layer. The cathode segment difference at the boundary of the light-transmitting area is reduced, the phenomenon of uneven brightness at the boundary of the light-transmitting area is weakened, and the brightness uniformity of the display panel is improved.
Owner:WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Illumination apparatus
InactiveUS20150309247A1Reduce uneven brightnessLess noticeable non-light emitting regionMechanical apparatusPlanar/plate-like light guidesLight guideOptical attenuator
An illumination apparatus includes: a plurality of light emitting panels each having a surface with a light emitting region and a non-light emitting region; a light guiding member having a light incidence face and a light exit face, with the light incidence face opposite to the surface of the light emitting panel; a reflector opposite to the non-light emitting region, and reflecting the light incident on the light guiding member; a light attenuator on the light exit face opposite to the light emitting region, and attenuating the light outputted through an area on the light exit face, the area being opposite to the light emitting region; and a light diffusion member opposite to the light guiding member with a gap therebetween.
Owner:KONICA MINOLTA INC
Planar luminescent illumination device including auxiliary electrode
InactiveCN1573468AReduce uneven brightnessElectroluminescent light sourcesSolid-state devicesOptoelectronicsAuxiliary electrode
A luminescent device (3) for reducing unevenness of brightness. The luminescent device includes a transparent substrate (12), which has a light exit surface (17) and an incident surface (18), and a luminescent element (4), which is formed on the incident surface of the transparent substrate. The luminescent element includes a transparent electrode (14) formed on the incident surface of the transparent substrate, an auxiliary electrode (13) formed on a part of the transparent electrode, and a thin-film layer (15), which is formed on the transparent electrode, for emitting light. The transparent substrate includes a projection (17a) formed on the light exit surface.
Owner:TOYOTA IND CORP
Display panel driving circuit
To provide a display panel driving circuit which employs a frame inversion system with low power consumption to drive a display panel and which decreases irregular luminance in one frame. The display panel driving circuit is equipped with: a memory means 10 to temporarily memorize input image data; a controlling means 40 to control the read-out operation of image data in one line from the memory means in such a manner that the display start lines in the display panel differ in every predetermined number of frame periods; and image signal supply means 21 to 33 to convert the image data of each line successively read out from the memory means into a plurality of analog image signals and to supply the image signals to the display panel.
Owner:SEIKO EPSON CORP
Light guide plate, backlight module group, and display device
InactiveCN105759340AIncrease brightnessImprove luminous performanceOptical light guidesSemiconductor devices for light sourcesLight guideDisplay device
The invention provides a light guide plate, a backlight module group, and a display device. A light incoming side of the light guide plate is provided with a groove for storing at least a part of LED lamps. The backlight module group comprises the light guide plate provided by one embodiment of the invention. The display device comprises the backlight module group provided by one embodiment of the invention. The light guide plate, the backlight module group and the display device can improve the light utilization rate of the LED lamps.
Owner:BOE TECH GRP CO LTD +1
Illumination unit and display apparatus using the same
ActiveUS20130050990A1Reduce uneven brightnessReduce brightnessNon-electric lightingPoint-like light sourceLight guideOptical axis
An illumination unit of the present invention includes a tabular light guide plate having a light emitting surface for emitting light coming from an LED as planar light, wherein a recessed portion is formed in the opposite surface of the light emitting surface of the light guide plate, and wherein the LED is provided in the recessed portion so that the optical axis of the LED becomes parallel to the light emitting surface of the light guide plate. Then, a dimming pattern is provided at a location corresponding to the LED of the light emitting surface of the light guide plate, and the dimming pattern includes a main portion covering the LED on the light emitting surface side, and protrusions radially extending toward a light emitting direction of the LED around the LED.
Owner:MAXELL HLDG LTD
Organic el display device
InactiveCN1942917AReduce brightness deviationReduce uneven brightnessElectrical apparatusStatic indicating devicesControl signalDisplay device
An organic EL display device (10) is provided with first and second drivers (1, 2), a multitude of switching circuits (US, DS) and a control circuit (5). The first and second drivers are provided with a multitude of output terminals (P). The multitude of switching circuits alternately connect n-number of the output terminal(s) of the first driver (1) (n is an integer of 1 or more) with one and the other of driving lines, which are of the 2n number of organic EL elements and are divided into two, and alternately connect n-number of the output terminal(s) of the second driver (2) with the remaining n-number of the other and the one of the driving lines. The control circuit (5) controls the multitude of switching circuits to switch at the same time by generating a control signal by m frame(s) (m is an integer of 1 or more) or by m horizontal line(s). Thus, brightness variation and brightness nonuniformity can be reduced.
Owner:ROHM CO LTD
Display device
InactiveCN101401144AReduce brightnessReduce uneven brightnessGas-filled discharge tubesStatic indicating devicesVoltage pulseDisplay device
In a display device (10), a scan-driving circuit (702) supplies a scanning voltage, and then a maintaining voltage pulse, to one side of display electrodes (Y1,..., Yj,..., Yn) of each pair of a plurality of pairs of display electrodes in adjacent two units (314, 316) of a plurality of units, at least one of at least two maintaining voltage circuits supplies a maintaining voltage pulse potential to the other side of display electrodes (X1,..., Xj,..., Xn) of each pair of a plurality of pairs of display electrodes of at least one unit (502) at the most outside of a plurality of units.
Owner:SHINODA PLASMA
Light guide plate and backlight module
ActiveCN101738673BReduce uneven brightnessUniform brightnessMechanical apparatusLight guides for lighting systemsLight guideOptoelectronics
The invention discloses a light guide plate and a backlight module. The light guide plate is suitable for guiding the light to move along a first direction and comprises a first surface, a second surface, a light incident surface and a plurality of first cylindrical structures. The light incident surface is connected to the first surface and the second surface; and the light is emitted into the light guide plate from the light incident surface. The first cylindrical structures are arrayed on the first surface in a mode that respective long shaft directions are approximately parallel to the first direction. Each cylindrical structure is provided with a curved surface protruded relative to the first surface and at least one groove which extends and is distributed along the first direction is formed on the curved surface.
Owner:CORETRONIC
Air mark inhibitor for two-acid chemical polishing of aluminum alloy on sandblasted surface and preparation method thereof
The invention discloses an air trace inhibitor for two-acid chemical polishing of aluminum alloy on a sandblasting surface and a preparation method thereof, belonging to the technical field of surface chemical treatment of aluminum alloy parts. The air mark inhibitor is prepared from 2‑3wt.% of molybdate, 5‑10wt.% of corrosion inhibitor, 10‑15wt.% of surfactant, 10‑15wt.% of water and the balance of phosphoric acid; The agent is formed by mixing hydroxyazosulfonic acid substances, alanine and allylthiourea. The polishing liquid containing this inhibitor can significantly inhibit the generation of air marks and reduce the uneven brightness caused by air marks when polishing aluminum alloy parts with holes; at the same time, it can effectively shorten the polishing time, thereby reducing Surface flower and material surface exposure caused by time. The inhibitor can significantly improve the yield rate and production efficiency, and reduce production costs. It is suitable for two-acid chemical polishing of aluminum products such as 3C products with holes, such as notebook casings, i PAD casings, and mobile phone casings. It is especially suitable for continuous production on automatic lines.
Owner:昆山市韩铝化学表面材料有限公司
Display device
InactiveCN101401144BReduce uneven brightnessGas-filled discharge tubesStatic indicating devicesVoltage pulseDisplay device
In a display device (10), a scan-driving circuit (702) supplies a scanning voltage, and then a maintaining voltage pulse, to one side of display electrodes (Y1,..., Yj,..., Yn) of each pair of a plurality of pairs of display electrodes in adjacent two units (314, 316) of a plurality of units, at least one of at least two maintaining voltage circuits supplies a maintaining voltage pulse potential to the other side of display electrodes (X1,..., Xj,..., Xn) of each pair of a plurality of pairs of display electrodes of at least one unit (502) at the most outside of a plurality of units.
Owner:SHINODA PLASMA
A display substrate, a display panel, and a method for manufacturing a display substrate
ActiveCN106876437BReduced control accuracyReduce manufacturing difficultySolid-state devicesSemiconductor/solid-state device manufacturingIsolation layerMechanical engineering
The invention relates to the field of display technology, and discloses a display substrate, a display panel and a manufacturing method of the display substrate. The display substrate includes: a base substrate; a plurality of sub-pixel areas arranged in an array arranged on the surface of the base substrate; an isolation layer arranged on the surface of the base substrate, and the isolation layer includes a dam arranged outside the plurality of sub-pixel areas and a set A plurality of partition dams arranged in parallel in the dam, there is an interval between the end of the partition dam and the dam, and the partition dam divides the multiple sub-pixel regions into multiple channels. When using the inkjet printing method to form the functional layer of the sub-pixel, if the material of the functional layer of the sub-pixel of different colors is the same, ink droplets can be ejected in each channel, and the ink droplets can flow freely in multiple channels until The uniform volume of the ink droplet can greatly reduce the control accuracy of the volume difference between the nozzles, thereby reducing the difficulty of manufacturing the display substrate and further improving the display quality of the display panel.
Owner:BOE TECH GRP CO LTD
Display apparatus
InactiveUS20120147064A1Uneven display brightnessReduce uneven brightnessCathode-ray tube indicatorsInput/output processes for data processingLight emissionBrightness perception
A display apparatus includes light emitting elements, wherein when an input gray-scale signal is lower than a certain gray-scale level, a light emitting element is caused to emit light upon receiving a first brightness signal higher than a brightness given based on the input gray-scale signal and a second brightness signal lower than the brightness given based on the input gray-scale signal during a former and a latter half of a light-emission period, and wherein when the input gray-scale signal is higher than the certain gray-scale level, the light emitting element is caused to emit light upon receiving the third brightness signal corresponding to the brightness given based on the input gray-scale signal during the former and the latter half of the light-emission period.
Owner:CANON KK
Planar luminescent illumination device including auxiliary electrode
InactiveCN1573468BReduce uneven brightnessElectroluminescent light sourcesSolid-state devicesAuxiliary electrodeOptoelectronics
A luminescent device (3) for reducing unevenness of brightness. The luminescent device includes a transparent substrate (12), which has a light exit surface (17) and an incident surface (18), and a luminescent element (4), which is formed on the incident surface of the transparent substrate. The luminescent element includes a transparent electrode (14) formed on the incident surface of the transparent substrate, an auxiliary electrode (13) formed on a part of the transparent electrode, and a thin-film layer (15), which is formed on the transparent electrode, for emitting light. The transparentsubstrate includes a projection (17a) formed on the light exit surface.
Owner:TOYOTA IND CORP
Display panel and display device
ActiveCN112952021BImprove brightness uniformityReduce the cathode step differenceSolid-state devicesSemiconductor/solid-state device manufacturingDisplay deviceMaterials science
Owner:WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
OLED display screen display control method and device, and storage medium
ActiveCN113140183AReduce displayReduce uneven brightnessStatic indicating devicesEngineeringControl switch
The invention relates to an OLED display screen display control method and device and a storage medium. The OLED display screen display control method comprises the following steps: acquiring optical compensation data of uneven brightness of a display screen; comparing the optical compensation data with a preset threshold value; when the optical compensation data is smaller than the preset threshold value, under the condition that a controlled switch of a pixel unit of the OLED display screen works in a saturation region range, decreasing the driving voltage of the pixel unit in the OLED display screen, wherein the reduced driving voltage is used for controlling the phenomenon of uneven brightness caused by display of the pixel unit, and the display effect is improved; and the display of the pixel units is controlled by the reduced driving voltage, so that the display power consumption can be reduced.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
Air mark inhibitor for two-acid chemical polishing of sand blasting surface aluminum alloy and preparation method of air mark inhibitor
The invention discloses an air mark inhibitor for two-acid chemical polishing of a sand blasting surface aluminum alloy and a preparation method of the air mark inhibitor, and belongs to the technical field of chemical treatment of surfaces of aluminum alloy workpieces. The air mark inhibitor is prepared from 2-3wt.% of molybdate, 5-10wt.% of a corrosion inhibitor, 10-15wt.% of a surfactant, 10-15wt.% of water and the balance phosphoric acid, wherein the corrosion inhibitor is formed by mixing a hydroxyazo sulfonic acid substance, alanine and allyl thiourea. When a polishing solution containing the inhibitor is used for polishing a sand blasting surface aluminum alloy workpiece with holes, generation of air marks can be remarkably inhibited, and brightness unevenness caused by the air marks is reduced; and meanwhile, the polishing time can be effectively shortened, so that the surface marks and material surface exposure caused by long polishing time are reduced. The inhibitor can remarkably improve the yield and the production efficiency, reduces the production cost, is suitable for two-acid chemical polishing of 3C products with holes such as notebook computer shells, i PAD shells and mobile phone shells, and is particularly suitable for continuous production of an automatic line.
Owner:昆山市韩铝化学表面材料有限公司
Panel module
PendingCN111176028AReduce uneven brightnessReduce the condition of broken bright spotsNon-linear opticsThin membraneEngineering
A panel module comprises a first substrate, a pixel electrode layer, a plurality of protection pads, a plurality of spacers and a second substrate. The pixel electrode layer is arranged on the first top surface of the first substrate and comprises a plurality of thin film transistors. The plurality of protection pads are arranged on the pixel electrode layer. Each protection pad has a protection pad length and a protection pad width in a first direction and a second direction perpendicular to the first direction, and one side of each protection pad, which is back to the first substrate, is substantially a plane. Each spacer has a contact region disposed on one of the protective pads to contact the contact region with the protective pad. The contact area has a contact length and a contact width in the first direction and the second direction respectively, and the protection pad length and the protection pad width are larger than the contact length and the contact width respectively. Thesecond substrate is disposed opposite to the first substrate, and the spacer is disposed on the second substrate and is in contact with the protective pad. The bending amount of the panel module in the first direction is larger than that in the second direction, and the length of the protection pad is larger than the width of the protection pad.
Owner:AU OPTRONICS CORP
A kind of backlight module and liquid crystal display device
ActiveCN102943981BReduce uneven brightnessLighting heating/cooling arrangementsOptical light guidesLiquid-crystal displayEngineering
Provided are a backlight module (230) and a liquid crystal display device. The backlight module (230) comprises: a back plate (233), a heat source (231) and a heat obstruction mechanism (240). The heat source (231) is fixedly arranged with respect to the back plate (233), and the heat obstruction mechanism (240) is arranged in a heat transfer path between the back plate (233) and the heat source (231) to obstruct the heat which is transferred from the heat source (231) to the back plate (233). By providing the heat obstruction mechanism (240) in a heat transfer path of the heat source (231) and a liquid crystal panel (210), the heat of the heat source (231) is obstructed from being transferred to the liquid crystal panel (210), thereby reducing the phenomenon of light mura resulting from the overheating of the liquid crystal panel (210).
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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