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The most basic LED energy saving lamp basic knowledge universal household lighting

(Summary description)Nowhomedecoration,LEDisnowpeopleusemostofthehomelights,itisakindofelectricalenergycanbeconvertedintolightenergyelectronicdeviceswiththecharacteristicsofthediode.Atpresent,differentlight-emittingdiodescanemitlightfromdifferentwavelengthsofinfraredtoblue,thecurrentissueofpurpleandultravioletlighthasalsobeenthebirthoflight-emittingdiodes.InadditiontotheblueLEDcoatedwithphosphor,thebluelightintowhitelightwhiteLED.LEDcolorandtechnology:TheLEDismadeofdifferentmaterials,canproducephotonswithdifferentenergies,whichcancontroltheLEDemittedbythewavelengthoflight,thatis,thespectrumorcolor.ThefirstLEDusedinthehistoryofthematerialisarsenic(As)gallium(Ga),thepositivePNjunctionpressuredrop(VF,canbeunderstoodaslitorworkingvoltage)is1.424V,thelightemittedfortheinfraredspectrumTheAnothercommonlyusedLEDmaterialforthephosphorus(P)gallium(Ga),thepositivePNjunctionvoltagedropof2.261V,thelightisgreen.Basedonthesetwomaterials,theearlyLEDindustryusesGaAs1-xPxmaterialstructure,theoreticallycanproducefrominfraredlighttoanywavelengthwithinthegreenlightoftheLED,thesubscriptXrepresentsthephosphoruselementtoreplacethepercentageofarsenicelements.GenerallythroughthePNjunctionvoltagedropcandeterminethewavelengthofLEDcolor.WhichtypicallyGaAs0.6P0.4redLED,GaAs0.35P0.65orangeLED,GaAs0.14P0.86yellowLEDandsoon.Asaresultofthemanufactureofgallium,arsenic,phosphorusthreeelements,socommonlyknownasthesethreeelementsLEDtube.TheGaN(galliumnitride),GaPgreenLEDandGaAsinfraredlightLED,knownasthetwo-elementLED.Thelatesttechnologyisafour-elementLEDmadeofAlGaInN,amixtureofaluminum(Al),calcium(Ca),indium(In)andnitrogen(N),whichcoversallvisibleandpartialUVThespectralrangeoflight.LEDluminousintensity:Luminousintensityunit(candlelightCandlepower)1CD(candlelight)referstothecompleteradiationoftheobject,intheplatinumfreezingpointtemperature,everysixtiethofthelightoftheunit,theluminousintensityunit(lumensLumen)Squarecmareaof​​theluminousintensity.(Inthepastreferstoadiameterof2.2cm,75.5gramsofwhaleoilcandles,burning7.78gramsperhour,theflameheightof4.5cm,alongthehorizontaldirectionoftheluminousintensity)1L(lumens)means1CDcandlelightatadistanceof1cm,Theareaof​​1squarecentimeterontheplaneoftheluminousflux.1Lux(lux)refersto1Loftheluminousfluxevenlydistributedintheareaof​​1squaremetersofillumination.GeneralactiveluminousbodywithluminousintensityunitcandlelightCD,suchasincandescentlamp,etc.;reflectiveorpenetratingtypeofobjectusingluminousfluxunitLumensL,suchasLCDprojector,etc.;andilluminationunitLuxLuxLux,generallyusedforphotographyandotherfields.Thethreeunitsofmeasurearenumericallyequivalent,butneedtobeunderstoodfromdifferentperspectives.Forexample,ifanLCDprojectorhasabrightness(luminousflux)of1600lumens,itsprojectedtoafullreflectionscreensizeof60inches(1squaremeter),theilluminationof1600lux,assumingitsoutputfromthelightsource1Cm,theopticalportareaof​​1squarecentimeter,thentheopticalportoftheluminousintensityof1600CD.TherealLCDprojectorduetothelossoflighttransmission,reflectionorlighttransmissionfilmlossandunevenlightdistribution,brightnesswillbegreatlyreduced,generally50%efficiencyisverygood.Inactualuse,theintensitycalculationisoftenusedinrelativelyeasymappingofdataunitsorchangetouse.FortheLEDdisplayThisactiveluminousbodyisgenerallyusedCD/squaremetersastheluminousintensityunit,andwiththeobservationanglefortheauxiliaryparameters,whichisequivalenttothesurfaceofthescreenunitilluminationunitlux;thisvalueandthescreeneffectivedisplayareaMultiplytoobtaintheluminousintensityoftheentirescreenatthebestviewingangle,assumingthattheluminousintensityofeachpixelinthepanelisconstantwithinthecorrespondingspace,thisvaluecanbeconsideredastheluminousfluxoftheentirescreen.Thegeneraloutdoortobemorethan4000CD/squaremetersofbrightnessinthesuncanhaveabetterdisplay.OrdinaryindoorLED,themaximumbrightnessof700~2000CD/squaremeters.TheluminousintensityofasingleLEDisinCDunits:Atthesametimewithaviewingangleparameters,luminousintensityandLEDcolordoesnotmatter.TheluminousintensityofasingletuberangesfromseveralmCDtofivethousandmCD.LEDmanufacturersgiventheluminousintensityofLEDlightinthe20mAlight,thebestviewingangleandthecentrallocationoftheluminousintensityofthelargestpoint.TheshapeofthetoplenswhentheLEDisencapsulatedandthepositionoftheLEDchipfromthetoplensdeterminestheLEDviewingangleandlightintensitydistribution.Generallyspeaking,thelargertheLEDviewingangleis,thesmallerthemaximumluminousintensityis,buttheaccumulatedluminousfluxonthewholethree-dimensionalhemispheredoesnotchange.Whenanumberofmoretightlydistributed,theluminoussphericalobjectsaresuperimposedoneachother,resultingintheuniformdistributionoftheluminousintensitydistributionoftheentireluminousplane.Incalculatingtheluminousintensityofthedisplay,accordingtotheLEDviewingangleandLEDdischargedensity,themanufacturerwillprovidethemaximumluminousintensityvaluemultipliedby30%to90%range,astheaveragesingle-tubeluminousintensity.LEDluminouslifeisverylong:Manufacturersaregenerallymarkedas100,000hoursormore,theactualshouldalsopayattentiontotheLEDbrightnessattenu

The most basic LED energy saving lamp basic knowledge universal household lighting

(Summary description)Nowhomedecoration,LEDisnowpeopleusemostofthehomelights,itisakindofelectricalenergycanbeconvertedintolightenergyelectronicdeviceswiththecharacteristicsofthediode.Atpresent,differentlight-emittingdiodescanemitlightfromdifferentwavelengthsofinfraredtoblue,thecurrentissueofpurpleandultravioletlighthasalsobeenthebirthoflight-emittingdiodes.InadditiontotheblueLEDcoatedwithphosphor,thebluelightintowhitelightwhiteLED.LEDcolorandtechnology:TheLEDismadeofdifferentmaterials,canproducephotonswithdifferentenergies,whichcancontroltheLEDemittedbythewavelengthoflight,thatis,thespectrumorcolor.ThefirstLEDusedinthehistoryofthematerialisarsenic(As)gallium(Ga),thepositivePNjunctionpressuredrop(VF,canbeunderstoodaslitorworkingvoltage)is1.424V,thelightemittedfortheinfraredspectrumTheAnothercommonlyusedLEDmaterialforthephosphorus(P)gallium(Ga),thepositivePNjunctionvoltagedropof2.261V,thelightisgreen.Basedonthesetwomaterials,theearlyLEDindustryusesGaAs1-xPxmaterialstructure,theoreticallycanproducefrominfraredlighttoanywavelengthwithinthegreenlightoftheLED,thesubscriptXrepresentsthephosphoruselementtoreplacethepercentageofarsenicelements.GenerallythroughthePNjunctionvoltagedropcandeterminethewavelengthofLEDcolor.WhichtypicallyGaAs0.6P0.4redLED,GaAs0.35P0.65orangeLED,GaAs0.14P0.86yellowLEDandsoon.Asaresultofthemanufactureofgallium,arsenic,phosphorusthreeelements,socommonlyknownasthesethreeelementsLEDtube.TheGaN(galliumnitride),GaPgreenLEDandGaAsinfraredlightLED,knownasthetwo-elementLED.Thelatesttechnologyisafour-elementLEDmadeofAlGaInN,amixtureofaluminum(Al),calcium(Ca),indium(In)andnitrogen(N),whichcoversallvisibleandpartialUVThespectralrangeoflight.LEDluminousintensity:Luminousintensityunit(candlelightCandlepower)1CD(candlelight)referstothecompleteradiationoftheobject,intheplatinumfreezingpointtemperature,everysixtiethofthelightoftheunit,theluminousintensityunit(lumensLumen)Squarecmareaof​​theluminousintensity.(Inthepastreferstoadiameterof2.2cm,75.5gramsofwhaleoilcandles,burning7.78gramsperhour,theflameheightof4.5cm,alongthehorizontaldirectionoftheluminousintensity)1L(lumens)means1CDcandlelightatadistanceof1cm,Theareaof​​1squarecentimeterontheplaneoftheluminousflux.1Lux(lux)refersto1Loftheluminousfluxevenlydistributedintheareaof​​1squaremetersofillumination.GeneralactiveluminousbodywithluminousintensityunitcandlelightCD,suchasincandescentlamp,etc.;reflectiveorpenetratingtypeofobjectusingluminousfluxunitLumensL,suchasLCDprojector,etc.;andilluminationunitLuxLuxLux,generallyusedforphotographyandotherfields.Thethreeunitsofmeasurearenumericallyequivalent,butneedtobeunderstoodfromdifferentperspectives.Forexample,ifanLCDprojectorhasabrightness(luminousflux)of1600lumens,itsprojectedtoafullreflectionscreensizeof60inches(1squaremeter),theilluminationof1600lux,assumingitsoutputfromthelightsource1Cm,theopticalportareaof​​1squarecentimeter,thentheopticalportoftheluminousintensityof1600CD.TherealLCDprojectorduetothelossoflighttransmission,reflectionorlighttransmissionfilmlossandunevenlightdistribution,brightnesswillbegreatlyreduced,generally50%efficiencyisverygood.Inactualuse,theintensitycalculationisoftenusedinrelativelyeasymappingofdataunitsorchangetouse.FortheLEDdisplayThisactiveluminousbodyisgenerallyusedCD/squaremetersastheluminousintensityunit,andwiththeobservationanglefortheauxiliaryparameters,whichisequivalenttothesurfaceofthescreenunitilluminationunitlux;thisvalueandthescreeneffectivedisplayareaMultiplytoobtaintheluminousintensityoftheentirescreenatthebestviewingangle,assumingthattheluminousintensityofeachpixelinthepanelisconstantwithinthecorrespondingspace,thisvaluecanbeconsideredastheluminousfluxoftheentirescreen.Thegeneraloutdoortobemorethan4000CD/squaremetersofbrightnessinthesuncanhaveabetterdisplay.OrdinaryindoorLED,themaximumbrightnessof700~2000CD/squaremeters.TheluminousintensityofasingleLEDisinCDunits:Atthesametimewithaviewingangleparameters,luminousintensityandLEDcolordoesnotmatter.TheluminousintensityofasingletuberangesfromseveralmCDtofivethousandmCD.LEDmanufacturersgiventheluminousintensityofLEDlightinthe20mAlight,thebestviewingangleandthecentrallocationoftheluminousintensityofthelargestpoint.TheshapeofthetoplenswhentheLEDisencapsulatedandthepositionoftheLEDchipfromthetoplensdeterminestheLEDviewingangleandlightintensitydistribution.Generallyspeaking,thelargertheLEDviewingangleis,thesmallerthemaximumluminousintensityis,buttheaccumulatedluminousfluxonthewholethree-dimensionalhemispheredoesnotchange.Whenanumberofmoretightlydistributed,theluminoussphericalobjectsaresuperimposedoneachother,resultingintheuniformdistributionoftheluminousintensitydistributionoftheentireluminousplane.Incalculatingtheluminousintensityofthedisplay,accordingtotheLEDviewingangleandLEDdischargedensity,themanufacturerwillprovidethemaximumluminousintensityvaluemultipliedby30%to90%range,astheaveragesingle-tubeluminousintensity.LEDluminouslifeisverylong:Manufacturersaregenerallymarkedas100,000hoursormore,theactualshouldalsopayattentiontotheLEDbrightnessattenu

Information

Now home decoration, LED is now people use most of the home lights, it is a kind of electrical energy can be converted into light energy electronic devices with the characteristics of the diode. At present, different light-emitting diodes can emit light from different wavelengths of infrared to blue, the current issue of purple and ultraviolet light has also been the birth of light-emitting diodes. In addition to the blue LED coated with phosphor, the blue light into white light white LED.

LED color and technology:

The LED is made of different materials, can produce photons with different energies, which can control the LED emitted by the wavelength of light, that is, the spectrum or color. The first LED used in the history of the material is arsenic (As) gallium (Ga), the positive PN junction pressure drop (VF, can be understood as lit or working voltage) is 1.424V, the light emitted for the infrared spectrum The Another commonly used LED material for the phosphorus (P) gallium (Ga), the positive PN junction voltage drop of 2.261V, the light is green.

Based on these two materials, the early LED industry uses GaAs1-xPx material structure, theoretically can produce from infrared light to any wavelength within the green light of the LED, the subscript X represents the phosphorus element to replace the percentage of arsenic elements. Generally through the PN junction voltage drop can determine the wavelength of LED color. Which typically GaAs0.6P0.4 red LED, GaAs0.35P0.65 orange LED, GaAs0.14P0.86 yellow LED and so on. As a result of the manufacture of gallium, arsenic, phosphorus three elements, so commonly known as these three elements LED tube. The GaN (gallium nitride), GaP green LED and GaAs infrared light LED, known as the two-element LED. The latest technology is a four-element LED made of AlGaInN, a mixture of aluminum (Al), calcium (Ca), indium (In) and nitrogen (N), which covers all visible and partial UV The spectral range of light.

LED luminous intensity:

Luminous intensity unit (candlelight Candlepower) 1CD (candlelight) refers to the complete radiation of the object, in the platinum freezing point temperature, every sixtieth of the light of the unit, the luminous intensity unit (lumens Lumen) Square cm area of ​​the luminous intensity. (In the past refers to a diameter of 2.2 cm, 75.5 grams of whale oil candles, burning 7.78 grams per hour, the flame height of 4.5 cm, along the horizontal direction of the luminous intensity) 1L (lumens) means 1CD candle light at a distance of 1 cm, The area of ​​1 square centimeter on the plane of the luminous flux.

1Lux (lux) refers to 1L of the luminous flux evenly distributed in the area of ​​1 square meters of illumination.

General active luminous body with luminous intensity unit candlelight CD, such as incandescent lamp, etc .; reflective or penetrating type of object using luminous flux unit Lumens L, such as LCD projector, etc .; and illumination unit Lux Lux Lux, generally used for photography and other fields. The three units of measure are numerically equivalent, but need to be understood from different perspectives. For example, if an LCD projector has a brightness (luminous flux) of 1600 lumens, its projected to a full reflection screen size of 60 inches (1 square meter), the illumination of 1600 lux, assuming its output from the light source 1 Cm, the optical port area of ​​1 square centimeter, then the optical port of the luminous intensity of 1600CD. The real LCD projector due to the loss of light transmission, reflection or light transmission film loss and uneven light distribution, brightness will be greatly reduced, generally 50% efficiency is very good.

In actual use, the intensity calculation is often used in relatively easy mapping of data units or change to use. For the LED display This active luminous body is generally used CD / square meters as the luminous intensity unit, and with the observation angle for the auxiliary parameters, which is equivalent to the surface of the screen unit illumination unit lux; this value and the screen effective display area Multiply to obtain the luminous intensity of the entire screen at the best viewing angle, assuming that the luminous intensity of each pixel in the panel is constant within the corresponding space, this value can be considered as the luminous flux of the entire screen. The general outdoor to be more than 4000CD / square meters of brightness in the sun can have a better display. Ordinary indoor LED, the maximum brightness of 700 ~ 2000CD / square meters.

The luminous intensity of a single LED is in CD units:

At the same time with a viewing angle parameters, luminous intensity and LED color does not matter. The luminous intensity of a single tube ranges from several mCD to five thousand mCD. LED manufacturers given the luminous intensity of LED light in the 20mA light, the best viewing angle and the central location of the luminous intensity of the largest point. The shape of the top lens when the LED is encapsulated and the position of the LED chip from the top lens determines the LED viewing angle and light intensity distribution. Generally speaking, the larger the LED viewing angle is, the smaller the maximum luminous intensity is, but the accumulated luminous flux on the whole three-dimensional hemisphere does not change.

When a number of more tightly distributed, the luminous spherical objects are superimposed on each other, resulting in the uniform distribution of the luminous intensity distribution of the entire luminous plane. In calculating the luminous intensity of the display, according to the LED viewing angle and LED discharge density, the manufacturer will provide the maximum luminous intensity value multiplied by 30% to 90% range, as the average single-tube luminous intensity.

LED luminous life is very long:

Manufacturers are generally marked as 100,000 hours or more, the actual should also pay attention to the LED brightness attenuation cycle, such as most of the car taillight UR red tube light ten to several tens of hours later, the brightness is only half of the original. Brightness attenuation cycle and LED production of the material process has a great relationship, generally in the case of economic conditions permit should be used to slow the attenuation of the four elements of the LED.

Color, white balance:

White is red, green and blue three colors according to the proportion of brightness mixture, when the green light in the brightness of 69%, red brightness of 21%, blue brightness of 10%, the color of the human eye after feeling is pure white The But the LED red, green and blue color coordinates because of the process and other reasons can not achieve the effect of full chromatography, and control the original color, including the deviation of the original color brightness to white light, known as color.

When coloring the full color LED display, in order to achieve the best brightness and the lowest cost, should try to choose the three primary colors luminous intensity to roughly 3: 6: 1 ratio of the composition of pixels.

White balance requires three kinds of primary colors in the same gray value of the synthesis is still pure white.

Primary color, primary color:

The primary colors are the basic colors that can be synthesized in various colors. The main colors in the shade are red, green and blue. The following figure shows the spectral points. The three vertices in the table are ideal for the primary wavelength. If the primary color is biased, the area where the color can be synthesized will be reduced, and the triangles in the spectrum table will shrink. From a visual point of view, the color will not only be biased, but will be reduced.

Red, orange, orange, yellow, yellow green, green, green, blue and green, pure blue, blue and purple, etc., orange red, orange, orange, yellow, yellow, green, green, blue and blue, according to its different wavelength characteristics and roughly divided into purple, Yellow green, blue and purple than pure red, pure green, pure blue price is much cheaper. Green is the most important of the three primary colors, because the green occupies 69% of the brightness in white and is in the center of the color horizontal arrangement. Therefore, in the balance between the purity of the color and the price of the relationship between the two, green is the focus of consideration of the object.

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