12v led strip lights is low-voltage electrical power, and 220V is high-voltage electricity for civilian use. It is also possible to say that the input voltage is 220V and the working voltage is 12V.
It is convenient to connect the 220V strip directly to any 220V source of power, but is not safe.
The low-voltage 12v led strip lights are safer. When connecting them to the power supply, it is necessary to connect a transformer before it is connected to the power supply.
The light strip plug 220V has a converter with rectifier and constant current output inside. Its rectified and filtering output voltage is 300V DC.
It regulates the output current by constant current conversion to 10 milliamperes DC to drive the LED light strips. The light strip 12V does not contain a converter, but 12V DC is used to power the LED strip.
LED Selection Parameters and 12V Direct Drive Led Strip Lights
Let me first ask you a question: Can 12V power a light-emitting diode directly by connecting it to resistors?
The maximum operating current of low-power, LED lamp beads in a variety of colors is usually 20mA. However the actual values vary between 5 to 15mA.
For low-power red LEDs, the voltage drop forward is 1.6~2V Green ones are usually 1.8~2.4V and blue and white are 3~3.3V.
Let’s suppose that a blue LED is driven by a power source of 12V. The voltage operating is 9mA. This means that the current-limiting resistor R = (12V-3V)/9mA = 1KO. 3V in the formula represents the voltage drop in the forward direction of the blue lamp beads.
Even though I picked an LED, it caused me problems. The light’s brightness isn’t as bright as the three-color light. However, I can only see red.
The parameters are as below the 3535MWAP from Nationstar Optoelectronics was chosen as the ‘d.
IF: is the forward current, which is referring to the current when the LED strip that is 12V is running. The working current for ordinary dimmers emitting light is typically very low, ranging from 10mA to 45mA.
Light-emitting Diodes (LEDs) are connected in series with resistors in order to shield the LEDs from voltage surges.
lD”lD” means wavelength.
Diets made of various materials can produce different colors.
Even for the same material there are different luminescent colors that are possible to obtain by altering the kind or concentration of impurities or changing the chemical composition of the substance.
The table below highlights the different luminescent substances that are used in LEDs.
Use of Luminous Color Material Wavelength
Ordinary red GaP 700
High Brilliance Red GaAsP630
Super bright red GaAlAs 660
AlGaInP Super bright red between 625 and 640
Green in the normal sense GaP
AlGaInP High Brilliance Green 572
Super bright green InGaNg 505-540
GaAsP in normal yellow 590-610
AlGaInP Super bright yellow 590-610
IV: Light intensity
The luminescent flux generated by an illuminationsource within a unit solid angle called the light intensity I of the source of light.
Millicandela is a unit for intense luminous intensity, which is also known as candela.
A lumen of light that is emitted within one unit solid angle is called a candela. Candela is the term used to describe the intensity of light in a certain direction.
VF: forward voltage
Forward voltage is the difference in voltage between the positive electrode and the negative when the current that flows forward through the LED is at some amount. The voltage drop is symbolized by the symbol “VF”.
The forward voltage of SMD LEDs that are commonly used by our company ranges from 2.0V-3.5V.
If the voltage is higher than the operating voltage of normal, the diode may be destroyed. Additionally, if the voltage in front is lower than a predetermined amount (called the threshold) the current becomes extremely low and no light is generated.
If the voltage is higher than certain levels that is, the forward current rises with the voltage.
The light is not accurate because the measured voltage drop forward is just a couple of Volts.
View angle: perspective
In the luminous intensity distribution graph the angle resulting from the luminous intensity equal to half of the maximum intensity is called the half value angle.
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The direction of maximum intensity of light is called the optical direction. In the figure, the angle between optical and mechanical axes is referred to as the angle of deviation.
The half-value angle directly is affected by the thickness of the chip and the size of the mould strip.
When manufacturing, different sizes of half-value angles can be made by selecting various materials and choosing different dimensions of the package based on customers’ requirements.
There are three categories in relation to the intensity of light angle distribution diagram:
High directivity can be achieved by the use of metal cavity packaging that is reflective points of either epoxy or metal. This is possible without the use of a scattering agent.
The half-value angles are 5deg to less than 20deg. It is extremely direct and can be used as an individual lighting source or used together with a light detector in order to create an automatic detection system.
b The standard type. is usually used as an indicator with the half-value angle being 20deg to 45deg.
C scattering type is an indicator light with a larger viewing angle, with an angle of 45deg to 90deg or greater.
