Led Lamp bead

              1. LED lamp bead is a semiconductor component, a chip with luminous effect, widely used in various indoor and outdoor lighting, display screens and other fields. ‌ LED lamp bead is a PN junction composed of P-type semiconductor and N-type  semiconductor, which has unidirectional conductivity.Under the action of appropriate voltage and current, it can emit light, and has the advantages of high efficiency, low energy consumption, long life, environmental protection and energy saving ‌.

               2. The working principle of LED lamp beads is based on electroluminescence phenomenon. When the appropriate voltage is applied to the LED lamp bead, the current excites the electrons, resulting in photon emission, the light we see. The core part of the LED lamp bead is the chip, and its quality directly affects the performance of the LED. In addition, phosphors play a role in regulating the color temperature in leds, while glueAnd wires are used to protect and connect the LED lamp bead electrode ‌.        

            3. When purchasing LED lamp beads, the key parameters that need to be understood include color temperature, light efficiency, brightness, illumination and color rendering index. The color temperature determines the color of the light, the lightefficiency measures the luminous efficiency of the LED, the brightness is the feeling of the strength of the light, the illuminance represents the luminous flux received on the unit area, and the color rendering index reflects the color of the light source to 
the object The ability to reduce. In addition, understanding that the quality of LED is affected by the choice of raw materials, the perfection of the packaging process and the heat dissipation performance helps to select higher quality LED lamp bea                                                                                                                                               

              4. Lamp bead voltage. A single small power LED lamp, the color is different, and the voltage required is different. Red/yellow: generally 1.8~2.1 volts, white/green/blue: generally 3.0~3.6 volts. The voltage required for a 1W high-power lamp is the same as above. The operating voltage can be inferred according to the light color: red 1.8~2.2v Yellow light 2.0~2.4v, green light 2.2~ 2.8V, blue light and white light 2.8~3.5v.

           5. LED current knowledge. one Low-power LED lights (including plug-in or patch type), the current allowed through each LED is generally not higher than 20 mA (standard 15mA); The current allowed through each dual-chip lamp is generally not higher than 40; Similarly, each three-chip lamp should not be higher than 60 MA. High-power LED, usually used is 1W, The maximum allowable safe current is 350 mA. In addition, high-power white LED (such as CREE's XML-T6) single power has reached 10W, voltage 3.3v 
current 3A.The size of the package is dependent on the current: The patch package is 0805, 1206 and other small power tubes, and the working current is generally 10 MA, but there are exceptions; 
               The patch package is 3014, 3528, 3535 and other small power tubes, and the working current is generally 20 to 50 MA, but there are exceptions;
                The patch package is 5050, 5060, 5630 and other medium power tubes, and the working current is generally 50 to 150 MA, but there are exceptions;
In the future, when using LED lights, stay more mindful, and use the correct adjustment of the LED voltage and LED current, which can also make the service life of LED lights longer.