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305results about How to "Luminous stability" patented technology
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Heat radiator and display unit
InactiveUS20070211205A1Improve thermal conductivityAvoid it happening againPoint-like light sourceLighting heating/cooling arrangementsDisplay deviceEngineering
Disclosed is a heat radiator which is provided in a transmissive display unit in which a plurality of rows of light emitting arrays constituted by arranging a plurality of light emitting units including a plurality of LEDs mounted on a wiring substrate are arranged on the back surface side of a transmissive display panel, and illuminating light emitted from the LEDs is irradiated onto the display panel. In the heat radiator, a radiation plate (28) supporting LEDs (18) and a heat sink (37) constitute an overlap area (57) with a back panel (13) interposed therebetween and are integrated with each other through the back panel by a fixing member in the overlap area. The back panel, radiation plate, and heat sink are firmly mounted to each other, achieving effective heat radiation.
Owner:SONY CORP
LED driving power supply control circuit and LED lamp by using same
InactiveCN101715265ALuminous stabilityStable jobAc-dc conversion without reversalElectric light circuit arrangementOvervoltageFull wave
The invention relates to an LED driving power supply control circuit. The LED driving power supply control circuit comprises an EMI filter and rectifier module, a DC-DC isolation constant current driver module, an input under-voltage lag protection module, and an output current protection module, wherein the EMI filter and rectifier module is used for performing EMI filter and full-wave rectification on an alternating-current voltage input by a power supply to generate a direct-current voltage; the DC-DC isolation constant current driver module is used for processing the direct-current voltage so as to generate a constant output current for the work of the LED power supply; the input under-voltage lag protection module is used for clamping and splitting the direct-current voltage so as togenerate an enable signal and controlling the DC-DC isolation constant current driver module to start or not to start according to the enable signal; and the output current protection module is used for detecting the constant output current and controlling the DC-DC isolation constant current driver module to stop generating the output current while the constant output current exceeds a current threshold. The invention also relates to an LED lamp. The LED driving power supply control circuit and the LED lamp realize the alternating-current inputting and constant-current outputting in a wide range and have the input clamping lag protection and the output overvoltage protection functions.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
Display apparatus using organic electroluminescent element and manufacturing method thereof
InactiveUS6969291B2Efficient use ofLuminous properties are stableElectroluminescent light sourcesSolid-state devicesInter layerOrganic electroluminescence
A display apparatus includes a substrate, a plurality of pixels formed on the substrate, and a barrier plate for separating adjoining pixels from each other. Each pixel includes a lower layer portion having wiring formed on the substrate, an upper layer portion having an organic electro-luminescent element, and a middle layer portion for insulating the lower layer portion and the upper layer portion from each other electrically. The organic electro-luminescent element is connected with the windings through a contact hole formed in the middle layer portion. The barrier plate is disposed in the upper layer portion so as to overlap with a region including a contact hole not suitable for forming the organic electro-luminescent element.
Owner:JOLED INC
Light-emitting element and light-emitting device using the same
InactiveUS20050116633A1Luminous stabilityEfficient emissionsDischarge tube luminescnet screensElectroluminescent light sourcesEngineeringCopper oxide
It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of layers constituting the light-emitting element. According to one aspect of a light-emitting element of the invention, the light-emitting element sandwiches a plurality of layers between a pair of electrodes, wherein at least one layer of the plurality of layers is a layer containing a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, nickel oxide, and titanium oxide, or at least one layer of layers different from a light-emitting layer among the plurality of layers is a mixed region of one substance selected from bismuth oxide, cobalt oxide, copper oxide, magnesium oxide, nickel oxide, zinc oxide, and titanium oxide and an organic compound.
Owner:SEMICON ENERGY LAB CO LTD
Phosphorescent oled with mixed electron transport materials
InactiveUS20060246315A1Reduce the driving voltageImprove luminanceDischarge tube luminescnet screensElectroluminescent light sourcesPhosphorescent oledsLow voltage
An OLED device comprises, in sequence, an anode, a light-emitting layer that comprises a phosphorescent light-emitting organometallic compound, a hole-blocking layer, and a cathode, and between the hole-blocking layer and the cathode, a further layer containing: a) a first compound that has the lowest LUMO value of the compounds in the layer, the amount being greater than or equal to 10% by volume and less than 100% by volume of the layer; b) at least one second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound, the total amount of said compound(s) being less than or equal to 90% by volume and more than 0% by volume of the layer. Such a device provides improved drive voltage.
Owner:EASTMAN KODAK CO
Luminogenic and fluorogenic compounds and methods to detect molecules or conditions
A method to detect the presence or amount of at least one molecule in a sample which employs a derivative of luciferin or a derivative of a fluorophore is provided.
Owner:PROMEGA
Light emitting device and method of manufacturing thereof
InactiveUS20050062057A1Improve luminous efficiencyReduce power consumptionElectroluminescent light sourcesSolid-state devicesHigh luminanceRefractive index
The present invention provides a highly stable light emitting device having high light-emitting efficiency (light-extraction efficiency) with high luminance and low power consumption, and a method of manufacturing thereof. A partition wall and a heat-resistant planarizing film are formed of a same material so as to be well-adhered to each other, thereby reducing material costs. Either an anode or a cathode is formed on the heat-resistant planarizing film. The partition wall and the heat-resistant planarizing film is adhered to each other without inserting a film having different refractive index therebetween, and therefore reflection of light is not caused in an interface.
Owner:SEMICON ENERGY LAB CO LTD
Organic el device and display
ActiveUS20060227079A1Improve balanceLuminous stabilityStatic indicating devicesElectroluminescent light sourcesHOMO/LUMODisplay device
A red light emitting layer 11, a green light emitting layer 12, a blue light emitting layer 13 are laminated in this order between an anode 3 and a cathode 5, and an intermediate layer “a” formed by use of an organic material is provided between the green light emitting layer 12 and the blue light emitting layer 13. The HOMO-LUMO energy gap in the intermediate layer “a” is greater than the HOMO-LUMO energy gap of a green light emitting material constituting the green light emitting layer 12. In addition, the intermediate layer “a” has a hole transporting property. In the case of configuring a display by use of the organic EL devices 1, color filters are provided on the light take-out surface side. This makes it possible to provide an organic EL device with which light emission components for three colors of red, green and blue with a good balance suited to use for a full-color display can be obtained at a high luminance.
Owner:JOLED INC
Organic EL display and method of manufacturing the same
InactiveUS20050275342A1Short curingInfiltration of moistureDischarge tube luminescnet screensElectroluminescent light sourcesDisplay deviceThin membrane
An organic EL display is displayed. The display is manufactured sealing and joining an organic light emitter constituted from thin film transistors, anodes, a light-emitting layer, a cathode and a protective layer which are laminated on a substrate, together with a laminated body of color filters and a black mask formed on a transparent substrate. The organic EL light-emitting layer is aligned with the color filters during the process of sealing the substrate and the transparent substrate using an outer periphery sealing layer and an internal sealing layer. The outer periphery sealing layer provides precise alignment between the organic EL light-emitting layer and the color filters and rapid fixing between them can be carried out, and prevents infiltration of moisture from the outside environment. The internal sealing layer prevents reflection of light from the organic EL light-emitting layer, and hence the light can be transmitted to the color filters effectively. The device and method prevent peeling apart due to cure shrinkage, peeling apart due to thermal stress from the temperature of the environment, and infiltration of moisture from the outside environment, so that stable light emission characteristics can be maintained over a long period.
Owner:FUJI ELECTRIC HLDG CO LTD
Water-absorbing agent for organic EL device and organic EL device
InactiveUS20050227114A1Luminous properties are stableImprove reliabilityDischarge tube luminescnet screensOther chemical processesOrganic layerUltraviolet
A thin-profile organic EL device with a high degree of reliability is provided. The anode, the organic layer and the light transmissible-type cathode are laminated on the substrate and the inorganic water-barrier layer are laminated thereon, and then a UV rays-curable type water-capturing agent comprising a UV rays-curing agent and a water-absorbing agent is cured to bond to the sealing substrate instead of an adhesive layer. The UV rays-curing agent comprises an acrylic monomer, initiator and accelerator. The UV rays-curable type sealing agent is placed to the outer peripheral portion of the UV rays-curable type water-capturing agent to be cured. The emission of the organic layer is transmitted upward via the cathode, UV rays-curable type water-capturing agent and the sealing substrate. The UV rays-curable type water-capturing agent can be formed in a desired thickness and pattern by applying it and irradiating with UV-rays, thereby making it possible to produce a low-profile organic EL device in large quantities with a high degree of reliability and without damaging the organic layer which is not resistant to water.
Owner:FUTABA CORPORATION
Encapsulated materials in porous particles
InactiveUS20170306221A1High white lightNarrow emission bandAdditive manufacturing apparatusGranule coatingParticulatesRadioactive agent
The invention provides a process for the production of a (particulate) luminescent material comprising particles, especially substantially spherical particles, having a porous inorganic material core with pores, especially macro pores, which are at least partly filled with a polymeric material with a first material embedded therein, wherein the process comprises (i) impregnating the particles of a particulate porous inorganic material with pores with a first liquid (“ink”) comprising the first material and a curable or polymerizable precursor of the polymeric material, to provide pores that are at least partly filled with said first material and curable or polymerizable precursor; and (ii) curing or polymerizing the curable or polymerizable precursor within pores of the porous material, as well as a product obtainable thereby. The first material comprises one or more materials selected from a group of materials comprising organic luminescent materials, rare-earth luminescent materials, organic dye materials, inorganic dye materials, thermochromic materials, photochromic materials, liquid crystal materials, magnetic materials, scattering materials, high-refractive index materials, radio-active materials, contrast agents and therapeutic agents.
Owner:KONINKLJIJKE PHILIPS NV
Light source unit and projector
ActiveUS20110096300A1Increase productionLuminous stabilityPhotometry using reference valueProjectorsLight sourceWavelength band
To provide a light source unit which prevents a reduction of light emitting efficiency in a luminescent material layer and a projector, a projector includes a light source unit, a display device and a projector control device, the light source unit includes an excitation light shining device, a luminescent wheel on which a luminescent material layer is laid circumferentially which receives the excitation light to emit luminescent light of a predetermined wavelength band, two types of light source devices for emitting light rays of wavelength bands which are different from the predetermined wavelength band, and a light source control device for controlling individually the emission of light by the excitation light shining device and the two types of light source devices and for controlling the rotating speed of the luminescent wheel in accordance with a period of time when the excitation light shining device is turned on.
Owner:CASIO COMPUTER CO LTD
Illumination device and liquid crystal display device
ActiveUS8111371B2Accurate temperature detectionSmall temperature changeStatic indicating devicesLighting heating/cooling arrangementsElectrical resistance and conductanceLiquid-crystal display
An illumination device includes an LED package, an LED driver including an FET, and a thermistor disposed on a substrate. A plurality of such LED packages are disposed on the substrate such that a first area and a second area, each determined by vertices corresponding to LED packages, are defined on the substrate. The thermistor is disposed in the first area, and the FET is disposed in the second area, which is outside of the first area. The thermistor detects a temperature in the first area. Such a configuration allows the thermistor to detect, in accordance with the temperature in the area, the temperature of heat transferred from the LED packages, without being affected by heat generated by the FET. This makes it possible to efficiently make temperature corrections to stabilize color temperature and luminance.
Owner:SHARP KK
Luminogenic and fluorogenic compounds and methods to detect molecules or conditions
ActiveUS20080299593A1Low backgroundHigh sensitivityCompound screeningApoptosis detectionLuciferinFluorescein
A method to detect the presence or amount of at least one molecule in a sample which employs a derivative of luciferin or a derivative of a fluorophore is provided. Compounds and compositions for carrying out the methods of the invention are also provided.
Owner:PROMEGA CORP
Printing plate quality detection system and method
ActiveCN103674962ARelatively high stabilityAccurate focusOptically investigating flaws/contaminationImaging processingHeat sink
The invention relates to a printing plate quality detection system and method. The system comprises a detection platform, an electric device, an image acquisition device and an image processing device, wherein the image acquisition device comprises an annular optical imaging light source, an area-array camera and a laser displacement sensor; the annular optical imaging light source comprises an annular frame body, a heat radiation sheet arranged on the outer side wall of the annular frame body and a plurality of LED (Light Emitting Diode) light sources arranged on the inner wall of the annular frame body; the annular optical imaging light source is used for uniformly illuminating in a focal plane of the area-array camera; the area-array camera is used for automatically scanning a detection object which is horizontally arranged on the detection platform under the irradiation of the annular optical imaging light source to acquire a high-quality image in the horizontal plane and carry out image pattern detection; the area-array camera or the laser displacement sensor is used for acquiring the depth of the detection object in the vertical direction so as to carry out depth measurement; the image processing device is used for carrying out data processing and analysis on image information to finish the quality detection. The system and the method have the advantages of high detection precision, high detection speed and high reliability.
Owner:BEIJING BANKNOTE CURRENCY DESIGNING & PLATING +2
Load driving circuit and multi-load feedback circuit
ActiveUS20110089865A1Low efficiencyImprove efficiencyTransistorElectroluminescent light sourcesComputer moduleFeedback circuits
A load driving circuit and a multi-load feedback circuit is disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive a LED module that has a current balancing circuit for balancing the currents flowing through LEDs. The load driving circuit and the multi-load feedback circuit modules the electric power transmitted by the LED driving apparatus to a LED module according to voltage level(s) of current balancing terminals having insufficient voltage in the current balancing circuit, and so the voltage levels of the current balancing terminals are higher than or equal to a preset voltage level, further increasing the efficiency thereof.
Owner:GREEN SOLUTION TECH CO LTD
Preparation of boron-doped graphene quantum dot electrochemiluminescence sensor for detecting miRNA-20a and application of sensor
ActiveCN104764782AHigh sensitivityLuminous stabilityChemiluminescene/bioluminescenceMaterial electrochemical variablesDoped grapheneElectrochemiluminescence
The invention belongs to the field of biology and relates to preparation of a boron-doped graphene quantum dot electrochemiluminescence sensor for detecting miRNA-20a and application of the sensor. The preparation method comprises the following steps: dropwise adding nanogold and BGQDs-DNA into a platinum electrode, so that the volumes of the nanogold and BGQDs-DNA on the electrode surface are 2-8 mu L / mm<2> and 2-6 mu L / mm<2>; and drying at room temperature, immersing the electrode into a buffer solution containing to-be-detected miRNA-20a of different concentrations, reacting at the temperature of 37 DEG C for 0.5-3 hours, and cleaning the electrode by using PBS buffer solution. The electrochemiluminescence signal of the electrode is detected by using a multi-channel chemiluminescence detection system, the electrolyte refers to 0.1M PBS and contains 0.1M KCl and 0.05M K2S2O8, the voltage is 0.7-1.15V, the scanning rate is 0.1V / s, and the high voltage of a photomultiplier is 600V. Compared with the traditional analysis method, the electrochemiluminescence detection method disclosed by the invention is low in cost, easy to operate and high in practicality.
Owner:DALIAN UNIV OF TECH
Heat dissipating structure and light emitting device having the same
InactiveUS20060249745A1Prevent degradationLuminous stabilityOptical wave guidanceLaser detailsEngineeringConductive materials
A heat dissipating structure is flip-chip bonded to a light-emitting element and facilitates heat dissipation. The heat dissipating structure includes: a submount facing the light-emitting element and having at least one groove; a conductive material layer filled into at least a portion of the at least one groove; and a solder layer interposed between the light-emitting element and the submount for bonding. The heat dissipating structure and the light-emitting device having the same allow efficient dissipation of heat generated in the light-emitting element during operation.
Owner:SAMSUNG ELECTRONICS CO LTD
Planar light source device and display device using the same
InactiveUS20060262530A1Stabilized chromaticityLuminous stabilityMechanical apparatusPoint-like light sourceLight guideDisplay device
A planar light source device includes a light source section having a plurality of light emitting diodes as a light source, and a light guiding plate guiding light from the light source section to emit planar light. The light emitting diodes being turned off detect the quantities of light from the other light emitting diodes, and adjust the quantities of light emission of the other light emitting diodes based on the detected quantities of light.
Owner:MITSUBISHI ELECTRIC CORP
Driving circuit for LED (light emitting diode) lamp
InactiveCN102215615ALuminous stabilityEliminate distractionsElectric light circuit arrangementOvervoltagePower factor
The invention relates to a driving circuit for an LED (light emitting diode) lamp. The driving circuit comprises an anti-surge overflow and overvoltage circuit, an EMC (electro magnetic compatibility) filter circuit, a rectifier bridge, a harmonic suppression circuit, a boosted circuit, a backward-stage rectifier filter circuit and a constant current circuit, wherein the input end of the anti-surge overflow and overvoltage circuit is externally connected with a commercial power network, and the output end of the constant current circuit is externally connected with the LED lamp. According to the invention, the low voltage power supply in the prior art is changed into a high voltage power supply for the LED lamp; and meanwhile, a switching converter can be omitted, the energy consumption when the switching converter is started and closed can be reduced, the power factor and the energy utilization ratio can be improved, and the purposes of energy conservation and environmental friendliness can be achieved.
Owner:上海古森实业有限公司
Load driving circuit and multi-load feedback circuit
ActiveUS8324834B2Low efficiencyLuminous stabilityTransistorElectroluminescent light sourcesFeedback circuitsElectric power
A load driving circuit and a multi-load feedback circuit is disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive a LED module that has a current balancing circuit for balancing the currents flowing through LEDs. The load driving circuit and the multi-load feedback circuit modules the electric power transmitted by the LED driving apparatus to a LED module according to voltage level(s) of current balancing terminals having insufficient voltage in the current balancing circuit, and so the voltage levels of the current balancing terminals are higher than or equal to a preset voltage level, further increasing the efficiency thereof.
Owner:GREEN SOLUTION TECH CO LTD
LED drive circuit and control circuit
InactiveCN102271442ALuminous stabilityAvoid damageApparatus without intermediate ac conversionElectric light circuit arrangementCapacitanceWork period
The invention provides a driving circuit and a control circuit for light emitting diodes, and the driving circuit and the control circuit are applied to controlling a power switching circuit to stabilize the output of the power switching circuit. The control circuit comprises a capacitor, a charging unit, a discharging unit, a feedback control unit and a working period adjusting unit, wherein the charging unit is provided with a current source connected with capacitor and is used for charging the capacitor, the discharging unit is connected with the capacitor and used for discharging the capacitor, the feedback control unit controls the charging unit to charge the capacitor according to a feedback signal indicative of an output state, and the working period adjusting unit generates a control signal and adjust a working period of the control signal according to a voltage of the capacitor.
Owner:GREEN SOLUTION TECH CO LTD
Organic light emitting display panel and fabrication method therefor
InactiveCN106783921AStable currentLuminous stabilitySolid-state devicesSemiconductor/solid-state device manufacturingCapacitancePower flow
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Phosphorescent OLED with mixed electron transport materials
ActiveUS20080258615A1Reduce the driving voltageLuminous stabilityDischarge tube luminescnet screensElectroluminescent light sourcesPhosphorescent oledsLow voltage
An OLED device comprising, in sequence, an anode, a light-emitting layer that comprises a phosphorescent light-emitting organometallic compound, a hole-blocking layer, and a cathode, and between the hole-blocking layer and the cathode, a further layer containing a mixture of a first compound that is a tetracene compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% and less than 90% and a second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound in an amount less than or equal to 90% and more than 10%.
Owner:GLOBAL OLED TECH
Environmental-friendly synthesis method of fluorescent carbon dot with up-down conversion function
InactiveCN103265952ARaw materials are cheap and easy to getSimple preparation processNano-carbonFluorescence/phosphorescenceQuantum yieldEngineering
The invention belongs to the field of preparation of fluorescent carbon dots, and discloses a synthesis method of the fluorescent carbon dot with an up-down conversion function. The method comprises the following steps of: adding chilli flakes into water and evenly mixing, thereby obtaining a mixture; transferring the mixture into a hydrothermal kettle, performing a hydrothermal treatment at 120 to 200 DEG C for 2 to 10 hours, and cooling and filtering, thereby obtaining a brown liquid; centrifuging the brown liquid for 10 to 20 minutes, thereby obtaining a supernatant; dialyzing the supernatant by using a dialysis bag with the flow interception volume of 3500; and collecting a dialysate after dialyzing for 10 to 30 hours, thereby obtaining the fluorescent carbon dot. By taking a cheap raw material as a carbon source and the water as a solvent, the method for synthesizing the fluorescent carbon dot with the up-down conversion function in an environmental-friendly manner has the effects that the process is simple; the pretreatment operation is not required; the process that the synthesis is assisted by a strong acid or a surface passivator is not required; the raw material is cheap and easy to obtain; the synthesis condition is moderate and controllable; the high fluorescence quantum yield is achieved; and the carbon dot is good in fluorescent bleaching resistance and stability.
Owner:HUNAN NORMAL UNIVERSITY
Light emitting material and light emitting device
InactiveUS20080009627A1High luminous efficiencyLow costIndium organic compoundsDischarge tube luminescnet screensHydrogen atomStructural formula
Provided is a light emitting material of which a light emitting device having high luminous efficiency and high stability and capable of being provided at a low cost can be formed. A light emitting material includes the following partial structural formula (1):wherein at least one of R1 to R10 represents a substituent except a hydrogen atom, a total number of benzene ring structures in R1 to R10 is 3 or more, and R1 to R10 include a trifluoromethyl group, or a linear, branched, or cyclic alkyl or alkoxyl group having 2 or more carbon atoms a hydrogen atom of which may be substituted by a halogen atom.
Owner:CANON KK
Light-emitting element having metal oxide and light-emitting device using the same
InactiveUS7605534B2Luminous stabilityEfficient emissionsDischarge tube luminescnet screensElectroluminescent light sourcesCopper oxideEngineering
It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of layers constituting the light-emitting element. According to one aspect of a light-emitting element of the invention, the light-emitting element sandwiches a plurality of layers between a pair of electrodes, wherein at least one layer of the plurality of layers is a layer containing a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, nickel oxide, and titanium oxide, or at least one layer of layers different from a light-emitting layer among the plurality of layers is a mixed region of one substance selected from bismuth oxide, cobalt oxide, copper oxide, magnesium oxide, nickel oxide, zinc oxide, and titanium oxide and an organic compound.
Owner:SEMICON ENERGY LAB CO LTD
Display clip system and timing clip control method thereof
InactiveUS20120105405A1Steadying imaging luminanceAvoiding screen transient flickeringDigital data processing detailsCathode-ray tube indicatorsDriver circuitComputer module
A display clip system and a timing clip control method thereof are provided. The clip system is connected to a gate driver circuit, and includes a timing controller and a clip module. According to a system input signal and it's frame rates, the timing controller generates an enable signal, a clip trigger signal, and a base working signal. The clip module adjusts the base working signal by using the enable signal and the clip trigger signal. Then, the base working signal carries a first clip voltage to output to the gate driver circuit. When the frame rate changes, the timing controller adjusts trigger points and trigger time lengths of the enable signal and the clip trigger signal, and the clip module adjusts the base working signal. Then, the base working signal carries a second clip voltage equal to the first clip voltage to output to the gate driver circuit.
Owner:CHUNGHWA PICTURE TUBES LTD
Liquid crystal display device
InactiveUS20070211009A1Reduce flickerLuminous stabilityStatic indicating devicesNon-linear opticsLiquid-crystal displayControl circuit
A liquid crystal display device includes liquid crystal pixels arrayed substantially in a matrix, a vertical driving circuit that selects the rows of pixels for video signal writing and for non-video signal writing, a horizontal driving circuit that writes a video signal in the pixels of a row selected for the video signal writing and a non-video signal in the pixels of a row selected for the non-video signal writing, and a control circuit that controls operation timings of the horizontal driving circuit and vertical driving circuit. In particular, the vertical driving circuit is configured to set a selection pattern for disabling an overlap between a selection period of selecting the pixels of each row for the video signal writing and a selection period of selecting the pixels of another row for the non-video signal writing, based on enable signals from the control circuit.
Owner:JAPAN DISPLAY CENTRAL CO LTD
LED driving power supply control circuit and LED lamp by using same
InactiveCN101715265BLuminous stabilityStable jobAc-dc conversion without reversalElectric light circuit arrangementOvervoltageAlternating current
The invention relates to an LED driving power supply control circuit. The LED driving power supply control circuit comprises an EMI filter and rectifier module, a DC-DC isolation constant current driver module, an input under-voltage lag protection module, and an output current protection module, wherein the EMI filter and rectifier module is used for performing EMI filter and full-wave rectification on an alternating-current voltage input by a power supply to generate a direct-current voltage; the DC-DC isolation constant current driver module is used for processing the direct-current voltage so as to generate a constant output current for the work of the LED power supply; the input under-voltage lag protection module is used for clamping and splitting the direct-current voltage so as togenerate an enable signal and controlling the DC-DC isolation constant current driver module to start or not to start according to the enable signal; and the output current protection module is used for detecting the constant output current and controlling the DC-DC isolation constant current driver module to stop generating the output current while the constant output current exceeds a current threshold. The invention also relates to an LED lamp. The LED driving power supply control circuit and the LED lamp realize the alternating-current inputting and constant-current outputting in a wide range and have the input clamping lag protection and the output overvoltage protection functions.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
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