35285050 basic knowledge, analysis and testing technology about the led strips

5050 led SMD led encapsulation and 3528 SMD led encapsulation,

1, 3528, what is the difference between SMD leds and 5050 SMD

specifications and dimension of the principal is said: 35 mm * 28 mm, 50 mm * 50 mm size, power is different also, on the application of the patch, 3528 on the brightness and 5050 had any advantage in life, not the same size.

2, 3528, and 5050 SMD leds have what use?

0, 3528505 are SMD table type LED packaging form the finished lamp size. Do name in size.

table type SMD lamps and upright type, compared to DIP lamp brightness is low, but the maintenance is convenient, Angle is larger. So the general indoor LED display are almost all SMD SMD leds.

3, LED soft article lamp 5050

5050 is LED encapsulation type. Named after the dimensions. Refers to the 5050 type LED lamp bead.

4, 3528, and 5050 SMD leds have what use?

0, 3528505 are SMD table type LED packaging form the finished lamp size. Do name in size.

table type SMD lamps and upright type, compared to DIP lamp brightness is low, but the maintenance is convenient, Angle is larger. So the general indoor LED display are almost all SMD SMD leds.

5, compatible with piranha 02. 03. 04 what mean? SMD is how? High power and how piranha is composed of SMD chip, 02. 03. 04 is LED stent models.

Surface Mounted Devices, meaning: SMD surface-mount Devices is the product of the unified model. For example: TOP, Chip, can be a SMD, namely belongs to flat packaging.

a little general SMD chip, use packaging 5050 or 3528 SMT chip for piranha.

chip size and, of course, there are many kinds. Used to do the size of the SMD from 7 x 9 mil - - 24 x 10 mil.

high power is: voltage more than 0. 5 w can call high power.

the LED test technology of the basic knowledge of

forward voltage: through the light-emitting diode forward current in order to determine the value, the resulting voltage drop between the poles.

reverse current: add on both ends of the light emitting diode reverse voltage to determine value, through the light-emitting diode current.

the peak wavelength, spectral radiation power maximum wavelength.

half strength Angle: in the light, Or radiation) The intensity distribution of light ( Or radiation) Luminous intensity is greater than or equal to half maximum intensity of Angle.

the main wavelength: any color we can see as a spectrum with a color according to certain proportion and a reference light source ( Such as CIE standard illuminant A, B, C, etc. , can light source such as E, standard D65 light body, etc. ) Mix and match the color, the color is the color of the main wavelength spectrum. Observed color of dominant wavelength is equivalent to the human eye color is tonal, Psychological quantity) 。 If already get LED chromaticity coordinates of the device under test, etc. Can be used to white light (E x0 = 0。 3333,y0=0. 3333). As a reference illuminant to calculate decided to color the main wavelength. Calculation according to the chromaticity diagram connection reference illuminant chromaticity points to the sample color chromaticity of linear slope, look-up table readout trajectory intersection of straight line and spectrum, determine the dominant wavelength.

the average intensity: light source in a given direction of a small solid Angle contained within the luminous flux of d Φ v and the ratio of the solid Angle d Ω unit for candela ( cd） Bandwidth:

radiation spectral radiation power is greater than or equal to half of the maximum wavelength intervals.