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39results about How to "Luminance unevenness" patented technology
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Light-emitting module, light source device, liquid crystal display device, and method of manufacturing light-emitting module
ActiveUS20120044669A1Luminance unevennessHeat is lostPlanar light sourcesPoint-like light sourceLiquid-crystal displayEngineering
Provided is a light-emitting module, a light source device and a liquid crystal display device in which unevenness in the luminance and color hardly occurs as compared to conventional technology. A light-emitting module 100 is structured such that a plurality of element columns, each composed of light-emitting elements 120 arranged in line, are mounted on a substrate 110, and each element column is individually sealed by a separate sealing member 130. The light source device and the liquid crystal device each include the above light-emitting module 100.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Light quantity control member, surface light source unit and display device
InactiveUS20110051044A1Luminance unevenness easyLuminance unevennessNon-electric lightingPoint-like light sourceDisplay deviceLuminous flux
A light quantity control member includes a light diffusion part formed by light diffusion members for diffusing light from a LED. The light diffusion part includes a first rectangular area positioned at the center of light flux from the LED and second rectangular areas positioned around the first rectangular area. The first rectangular area has an occupied area of the light diffusion members larger than any other second rectangular areas. If respective distances between a first center of the first rectangular area and respective second centers of the second rectangular areas are equal to each other, the occupied areas of the diffusion members of the second diffusion areas become equal to each other. The longer the distance between the first center of the first rectangular area and the second center of the second rectangular area gets, the smaller the occupied area of the light diffusion members of the second rectangular area becomes.
Owner:JVC KENWOOD CORP A CORP OF JAPAN
Display element and display apparatus
InactiveUS20050179632A1Reduce degree changeDegree of change is smallStatic indicating devicesNon-linear opticsElectric fieldPhysics
A display element includes: a pair of substrates, at least one of which is transparent; a medium, between the substrates, the medium being changeable in an optical anisotropy magnitude by and according to electric field application; and a region in which a pixel electrode and a counter electrode overlap with each other with an insulating layer therebetween.
Owner:SHARP KK
Lighting apparatus and image display apparatus provided therewith
InactiveUS20130094245A1Improve cooling effectMaintain structural strengthLighting heating/cooling arrangementsOptical light guidesLight equipmentLight guide
Provided are a lighting apparatus capable of improving heat-releasing performance while maintaining structural strength, subduing luminance unevenness due to uneven heat distribution, and allowing the device to be thinner, and an image display apparatus including the lighting apparatus. A heat-conducting member (6) includes: a light-source supporter having a plane facing a light-incident plane; and a plate section having a plane facing a light-emitting plane and a plane facing a heat-releasing member (5), the light-source supporter being adjacent to the plate section. On the light-source supporter, a light source (7) is positioned on the plane facing the light-incident plane so as to face the light-incident plane, the plane of the plate section which faces the heat-releasing member (5) contacts a plane of the heat-releasing member (5) which faces a light guide member, and a centroid of the plate section deviates along a direction parallel to both the light-incident and light-emitting planes.
Owner:SHARP KK
Image display apparatus and method for correcting luminance unevenness produced by image display apparatus
ActiveUS20140092117A1Easy to masterLuminance unevennessCathode-ray tube indicatorsVisual perceptionLightness
An image display apparatus capable of providing a luminance unevenness correction capability that allows a user to readily visually grasp the correction is provided. An image display apparatus that includes an OSD display section that displays pattern images showing areas for luminance adjustment in an image, a pattern image selection operation section that accepts selection of any of the displayed pattern images, a luminance adjustment operation section that accepts operation of adjusting the luminance of the image, and a luminance correction section that adjusts the luminance of the image in the area for luminance adjustment corresponding to the selected pattern image.
Owner:SEIKO EPSON CORP
Organic EL drive circuit and organic EL display device using the same organic EL drive circuit
ActiveUS20050259050A1Reduce brightness unevennessReduce manufacturing costStatic indicating devicesElectroluminescent light sourcesReference currentCurrent divider
A current inputted from a first input terminal and a reference current generated by an internal reference current generator circuit, which are in phase, are inputted to a reference current selector circuit by which either the inputted current or the reference current is selected. The selected current is temporarily phase-inverted by a current inverter circuit and drives a current mirror circuit of a current distributor circuit (or a reference current regulator circuit) for duplicating the reference current and distributing them. Currents, each of which is in phase with the reference current or the inputted current and has same current value as that of the reference current or the inputted current, can be generated in the output side transistors of the current mirror circuit. In order to realize this, a second output side transistor is provided in the current mirror circuit so that a current, which is in phase with the reference current and has substantially equal value to that of the selected current, is supplied from the output terminal to a next stage integrated circuit as an input reference current.
Owner:ROHM CO LTD
Light emitting device and light sheet
ActiveUS20140203700A1Light extraction efficiencyLuminance unevennessIncadescent screens/filtersElectric discharge tubesTransmittanceLight emitting device
A light-emitting device disclosed herein includes: an emission layer; a diffraction grating structure including a diffraction grating; and a diffusion layer having a structure for diffusing light which is transmitted from one face to another face. The light going out from the emission layer has a central wavelength λ. The diffraction grating has a period p which is not less than 1.0λ and not more than 3.5λ. The diffusion layer has a haze of 80% or more and a total light transmittance of 80% or less.
Owner:SAMSUNG DISPLAY CO LTD
Projection image displaying device
ActiveUS20130235355A1Improve the display effectDeterioration of luminance of projectedProjectorsMicroscopesProjection imageDisplay device
In a projection image displaying device which projects imaging light emitted from a projection lens 2 by being reflected by a projection mirror 3, an air inlet 4d for sucking external air is provided at the position of a sealing mechanism 3a of the projection mirror 3. Air blown off through openings 2a, 2b provided around the projection lens 2 is sucked into a case through this air inlet 4d. When a cooling operation of cooling components within the case is to be performed by sealing the projection mirror 3, a sucking operation through the air inlet 4d is stopped. This prevents dust in the external air from adhering to a reflective surface of the projection mirror regardless of the installation state of the projection image displaying device.
Owner:MAXELL HLDG LTD
Liquid crystal display device and method for controlling same
InactiveUS20150145972A1Degradation of image qualityLuminance unevennessCathode-ray tube indicatorsColor television detailsLiquid-crystal displayLed array
Provided is a liquid crystal display device with which it is possible to suppress degradation of image quality during video display or three-dimensional display without causing gradational luminance irregularities. Writing of an image to be displayed is sequentially performed from one side of a panel to the other side thereof during each frame period, and writing of a black image is sequentially performed from the one side of the panel to the other side thereof during the vertical blanking period in each frame period. A plurality of LEDs composing a backlight are divided into a plurality of segments so that a group of LEDs arrayed in a line in the direction in which scanning signal lines extend belong to the same segment. A segment lighting control circuit in a backlight control circuit controls emission intensities of the LEDs segment by segment so that the intensity of light irradiating the panel increases gradually from the one side of the panel to the other side thereof.
Owner:SHARP KK
Display with organic light emitting elements including a light emitting layer provided by transferring a transfer layer from a donor substrate to an acceptor substrate
InactiveUS8232720B2Suppressed distribution of film thicknessImprove display qualityDischarge tube luminescnet screensLamp detailsDisplay deviceGreen-light
A display is provided. The display includes an acceptor substrate including red light-emitting elements arranged in a first column, green light-emitting elements arranged in a second column, and blue light-emitting elements arranged in a third column. The light-emitting elements are arranged along a row direction and are each obtained by arranging rectangular organic light-emitting elements for generating light of one of red, green, and blue along a longitudinal direction of the organic light-emitting elements.
Owner:SONY CORP
Lighting device and display device
ActiveUS20170363909A1Luminance unevennessUneven luminanceMechanical apparatusLight guides for lighting systemsEdge surfaceLight guide
A lighting device includes LEDs 17, and a light guide plate 19 including an edge surface and a pair of plate surfaces, a part of the edge surface being a light entrance surface 19B through which light from the LEDs 17 enters, and one of the plate surfaces being a light exit surface 19A through which the light exits and another one of the plate surfaces being an opposite plate surface 19C opposite from the light exit surface 19A. The light guide plate 19 includes prism portions 51 on the opposite plate surface 19C, projecting from the opposite plate surface 19C and arranged in the X-axis direction and configured to collect light toward in a normal direction of the light exit surface 19A, and an exit light reflection portion 60 provided in a recessed portion 52 that is formed by two adjacent prism portions 51 and configured to reflect light travelling within the light guide plate 19 and facilitate exiting of light from the light guide plate 19.
Owner:SHARP KK
Image reading apparatus and image forming apparatus capable of adjusting the difference between the spectral characteristics
ActiveUS8411317B2Increase in sizeLuminance unevennessDigitally marking record carriersDigital computer detailsPhotoelectric conversionLength wave
Owner:CANON KK
Display device and operation method thereof, and electronic device
ActiveUS20180005600A1Lengthen timeLuminance unevennessTransistorSolid-state devicesDigital dataSimulated data
A first circuit generates first display data that is digital data which has information on luminance of an image displayed on a display portion. A second circuit generates second display data that is digital data obtained by converting a digital value of the first display data. A third circuit generates a first analog signal and a second analog signal whose potentials are calculated on the basis of the digital value of the first display data. The potential of the second analog signal is lower than the potential of the first analog signal. A fourth circuit converts the second display data into third display data that is analog data. A potential of the third display data is calculated on the basis of the potential of the first analog signal, the potential of the second analog signal, and a digital value of the second display data.
Owner:SEMICON ENERGY LAB CO LTD
Light Source Device and Display Apparatus
ActiveUS20160085020A1Reduce rateInhibitionMechanical apparatusLight guides for lighting systemsPhysicsReflectivity
Provided are a light source device capable of suppressing reflection of light which is irregularly reflected on a side face relating to a notch part, and a display apparatus. The light source device includes a light guide plate having a notch part formed at an edge part thereof, and a reflection sheet which is disposed to face the light guide plate and has a notch part formed at an edge part corresponding to the notch part, wherein the reflection sheet includes a low-reflection part which is provided around the notch part of a surface facing the light guide plate and has a reflectance lower than that of the reflection sheet.
Owner:SAKAI DISPLAY PROD
Lighting device, display device, television receiver
InactiveUS20120081632A1Reduce thicknessLower areaLighting support devicesPoint-like light sourceTelevision receiversDisplay device
It is an object of the present invention to provide a lighting device that can attain a reduction in thickness. A lighting device according to the present invention includes a hot-cathode tube 50, a circuit board 80, and a second cabinet Cb. The circuit board 80 is configured to supply electric power to the hot-cathode tube 50. The second cabinet Cb has a rectangular shape in plan view and houses the hot-cathode tube 50 and the circuit board 80. The hot-cathode tube 50 is arranged in a center area of the second cabinet Cb with respect to a longer-side direction or a shorter-side direction of the second cabinet Cb to form a board housing section 30b. The board housing section 30b houses the circuit board 80. The board housing section 30b is provided in at least one of outer areas each located on either side of the center area with respect to the longer-side direction or the shorter-side direction in the second cabinet Cb.
Owner:SHARP KK
Video display apparatus and video display system
ActiveUS20200201049A1Increase widthLuminance unevennessMechanical apparatusColor television detailsEngineeringLight guide
To provide a wide eye box and are capable of displaying a video having uniform luminance, it is provided a video display apparatus comprising: a video projection unit configured to project video light; a video light replication unit configured to replicate the video light; and a light guiding unit configured to transmit the video light through an inside of the light guiding unit, wherein the video light replication unit is configured to transmit the video light emitted from the video projection unit to the light guiding unit, wherein the light guiding unit is configured to transmit the video light that has entered through the inside to output the video light, and wherein the video light replication unit is configured to replicate the video light that has entered the video light replication unit so that a luminance distribution of the video light output from the light guiding unit is uniform.
Owner:HITACHI-LG DATA STORAGE
Illuminating device and display device provided with the same
InactiveUS20100201613A1Reduce power consumptionImprove brightness uniformityStatic indicating devicesOptical light guidesDevice formImaging quality
An illuminating device in which luminance unevenness caused by a lamp holder of a tubular light source is reduced is provided as a large-area, thin illuminating device formed as a surface-emitting light source by an edge light method, and a thin, large-screen display device with low power consumption that is able to obtain a display image quality that is not a problem on a practical level is provided, by using the illuminating device as a backlight of a display element that displays an image by controlling transmission of light. The illuminating device includes a tabular light guide including a light emitting surface that is preferably substantially rectangular, tubular light sources provided respectively opposite two opposing lateral surfaces of the light guide, and at least one pair of lamp holders respectively holding the tubular light sources at intermediate portions of two opposing lateral surfaces of the light guide, and the lamp holders in the pair are disposed so as to be displaced from each other in a tube axis direction of the tubular light sources.
Owner:SHARP KK
OLED display with a current stabilizing device and its driving method
ActiveUS20120081034A1Luminance unevennessUneven luminanceElectrical apparatusCathode-ray tube indicatorsPower flowCurrent limiting
An OLED display with a current stabilizing device employs a voltage boosting and current stabilizing device which is coupled between the driving-voltage line of the data driver and the data-power-supply wires to produce an output voltage higher than the driving voltage by boosting the driving voltage of the data driver, and then to maintain the current of the OLEDs at a constant level by performing current limiting, so that the problem of the current-ununiformity caused uneven luminance of the conventional OLED display can be solved, and the possibility that the luminance of the OLED panel will decay in a short period of time is reduce.
Owner:WINSTAR DISPLAY CO LTD
Light guide plate
ActiveUS20150070935A1Improve light utilization efficiencyReduce unevennessMechanical apparatusPlanar/plate-like light guidesLight guideComputational physics
A large-sized thin light guide plate has a first layer on a light exit surface side and a second layer on a rear surface side containing scattering particles at a higher particle concentration than the first layer. Thicknesses of the layers in a direction substantially perpendicular to the light exit surface change to change a combined particle concentration. The scattering particles, obtained by mixing a particle group with an average particle size Ds of less than 7 μm having one or more local maximum values and a particle group with an average particle size Db of more than 7 μm having one or more local maximum values, satisfy 1 μm≦Ds<7 μm, 7 μm<Db≦12 μm and 0.3≦a≦0.5. High light use efficiency, reduction of luminance and color unevenness, a convex brightness distribution and easy manufacture can be achieved.
Owner:FUJIFILM CORP
Light guide plate
ActiveUS9411085B2Improve light utilization efficiencyEasy to manufactureMechanical apparatusPlanar/plate-like light guidesLight guideComputational physics
A large-sized thin light guide plate has a first layer on a light exit surface side and a second layer on a rear surface side containing scattering particles at a higher particle concentration than the first layer. Thicknesses of the layers in a direction substantially perpendicular to the light exit surface change to change a combined particle concentration. The scattering particles, obtained by mixing a particle group with an average particle size Ds of less than 7 μm having one or more local maximum values and a particle group with an average particle size Db of more than 7 μm having one or more local maximum values, satisfy 1 μm≦Ds<7 μm, 7 μm<Db≦12 μm and 0.3≦a≦0.5. High light use efficiency, reduction of luminance and color unevenness, a convex brightness distribution and easy manufacture can be achieved.
Owner:FUJIFILM CORP
Light emitting device and light sheet
ActiveUS9194545B2Light extraction efficiencyLuminance unevennessDiffusing elementsElectroluminescent light sourcesOptical transmittanceLength wave
Owner:SAMSUNG DISPLAY CO LTD
Projection image displaying device with openings around its projection lens and mirror
InactiveUS9122139B2Prevent dust intrusionReduce the amount of lightProjectorsMicroscopesProjection imageDisplay device
In a projection image displaying device which projects imaging light emitted from a projection lens by being reflected by a projection mirror, an air inlet for sucking external air is provided at the position of a sealing mechanism of the projection mirror. Air blown off through openings provided around the projection lens is sucked into a case through this air inlet. When a cooling operation of cooling components within the case is to be performed by sealing the projection mirror, a sucking operation through the air inlet is stopped. This prevents dust in the external air from adhering to a reflective surface of the projection mirror regardless of the installation state of the projection image displaying device.
Owner:MAXELL HLDG LTD
Organic EL drive circuit and organic EL display device using the same organic EL drive circuit
ActiveUS7586469B2Reduce brightness unevennessReduce manufacturing costStatic indicating devicesElectroluminescent light sourcesReference currentDisplay device
A current inputted from a first input terminal and a reference current generated by an internal reference current generator circuit, which are in phase, are inputted to a reference current selector circuit by which either the inputted current or the reference current is selected. The selected current is temporarily phase-inverted by a current inverter circuit and drives a current mirror circuit of a current distributor circuit (or a reference current regulator circuit) for duplicating the reference current and distributing them. Currents, each of which is in phase with the reference current or the inputted current and has same current value as that of the reference current or the inputted current, can be generated in the output side transistors of the current mirror circuit. In order to realize this, a second output side transistor is provided in the current mirror circuit so that a current, which is in phase with the reference current and has substantially equal value to that of the selected current, is supplied from the output terminal to a next stage integrated circuit as an input reference current.
Owner:ROHM CO LTD
Display device and operation method thereof, and electronic device
ActiveUS10515609B2Luminance of the backlight is made constant regardless of luminanceReduce light timeTransistorSolid-state devicesDigital dataDisplay device
A first circuit generates first display data that is digital data which has information on luminance of an image displayed on a display portion. A second circuit generates second display data that is digital data obtained by converting a digital value of the first display data. A third circuit generates a first analog signal and a second analog signal whose potentials are calculated on the basis of the digital value of the first display data. The potential of the second analog signal is lower than the potential of the first analog signal. A fourth circuit converts the second display data into third display data that is analog data. A potential of the third display data is calculated on the basis of the potential of the first analog signal, the potential of the second analog signal, and a digital value of the second display data.
Owner:SEMICON ENERGY LAB CO LTD
Overhead console and vehicle-body upper structure
ActiveUS10569706B2Avoid it happening againDegree of freedomLight guidesWindow lightingsLight guideEngineering
An overhead console includes: a light source; and a light guiding member including bending portions at intermediate positions in the light guiding member such that the light guiding member extends from the light incident surface to the light exit surface so as to form an optical path in which light incident on the light incident surface is reflected by reflecting surfaces provided in the bending portions so as to reach the light exit surface, the light guiding member having such a shape that line segments drawn between given points on the light incident surface and given points on the light exit surface do not include a line segment that passes through only the light guiding member.
Owner:TOYOTA JIDOSHA KK
Organic EL element and organic EL element manufacturing method having an auxiliary electrode includes a linear portion and a curved portion
ActiveUS9837630B2Unevenness in the luminance of the light emitting surface can be sufficiently suppressedLuminance unevennessFinal product manufactureSolid-state devicesLine widthOrganic layer
An organic EL panel includes a first substrate, a first electrode disposed on the first substrate, an organic layer including a light emitting layer and disposed on the first electrode, a second electrode disposed on the organic layer, and an auxiliary electrode stacked on the first electrode. The auxiliary electrode includes a linear portion and a curved portion, and the curved portion has a greater line width than the linear portion.
Owner:SAMSUNG DISPLAY CO LTD
Display apparatus
InactiveUS9958716B2Avoid it happening againSuppress fluctuationsMechanical apparatusPlanar/plate-like light guidesWrinkle skinBrightness perception
Owner:SAKAI DISPLAY PROD
Display device and display driving method therefor
ActiveUS20110316836A1Function increaseEnhance mobility correcting abilityCathode-ray tube indicatorsInput/output processes for data processingDisplay deviceHemt circuits
Disclosed herein is a display device, including: a pixel array in which pixel circuits each having a light emitting element, a driving transistor for applying a current corresponding to a gate-to-source voltage to the light emitting element connected to a source side by applying a drive voltage across a drain and a source, a sampling transistor for inputting a signal line voltage to a gate of the driving transistor by being caused to conduct, and a sustaining capacitor connected between the gate and the source of the driving transistor for sustaining a video signal voltage inputted thereto are disposed in a matrix; a signal selector; a drive control scanner; and a write scanner.
Owner:JOLED INC
Backlight system and liquid crystal display device using the same
InactiveUS8922735B2Improve efficiencyUnevenness colorIlluminated signsNon-linear opticsLiquid-crystal displayLight beam
A backlight system includes: a light-emitting section (1) having a plurality of light sources that emit beams of light at different dominant wavelengths from one another; and an imaging optical system (3) including a plurality of microlenses (3a) that focus beams of light emitted from the light-emitting section (1), the backlight system irradiating a liquid crystal panel with beams of light having passed through the imaging optical system (3), the liquid crystal panel including a plurality of pixels arrayed at a predetermined pitch from each other, on the assumption that the pitch at which the pixels are arrayed is denoted as P and the imaging optical system (3) has an imaging magnification of (1 / n), the light sources (1) being arrayed at a pitch (P1) given as P1=n×P, the microlenses (3a) being arrayed at a pitch (P2) given as P2=(n / (n+1))×P.
Owner:SHARP KK +1
Display Panel and Display Device Using the Same
ActiveUS20220139317A1Reduce brightnessIncrease volumeStatic indicating devicesDisplay deviceEngineering
The present disclosure relates to a display panel and a display device using the same, and includes a first pixel area in which pixels connected to a first cathode electrode are disposed, and a second pixel area in which pixels connected to a second cathode electrode are disposed. A data voltage of pixel data to be written to a pixel in the second pixel area is applied to a first gate electrode of a driving element disposed in the second pixel area. A compensation voltage for increasing the luminance of the second pixel area is applied to the gate electrode of the driving element.
Owner:LG DISPLAY CO LTD
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