The three-color LED is composed of two different colors of the tube core, with a common Yang and a common Yin connection, so it is a loose pin. When the two tubes are each bright, two colors appear, and when the two tubes are bright together, it is a mixed color, so it is called three-color LED. If the brightness of the two tubes is controlled separately, the color of the mixture will be different. LED is the abbreviation of English light emitting diode (light-emitting diode), its basic structure is an electroluminescent semiconductor material chip, solidified to the bracket with silver or white glue, and then connected to the chip and circuit board with silver or gold wire, and then sealed around with epoxy resin to protect the internal core wire. Finally, the shell is installed, so the seismic performance of the LED lamp is good. Comparison of advantages and disadvantages of led lights:
1. Energy saving.
2. Long life.
3. Good applicability, because of the small size of a single LED, it can be made into any shape.
4. The response time is short, which is the response time of ns(nanosecond) level, while the ordinary lamp is the response time of ms(millisecond) level.
5. Environmental protection, no harmful metals, waste is easy to recycle.
6. Gorgeous color, pure luminous color, narrow spectral range, and can be mixed into seven colors or white light through red, green and blue three primary colors. The disadvantages are expensive.
2. There is still a big gap between the light efficiency and the theoretical light efficiency that can be generally achieved at present.
3. There is still a big gap between the life that can be achieved and the theoretical life (10w hours).
4. There is still a certain amount of heat.
5. Light decay can also be greatly reduced.
The principle of ceiling light change: internal chip control.
There are three kinds of lights inside the lamp, respectively, there are three relays or bidirectional thyristor control, the controller has a function similar to CD40110 addition counter chip, after power on, to provide power to the chip at the same time, will give the chip addition counter a high level pulse, the counter adds one, the output potential changes accordingly. The lower three outputs of the chip control the light from the bulb through relays or thyristors.
After a short period of interruption, the power supply of the chip relies on the electrical energy stored by the capacitor to maintain, temporarily no longer, and when the light is turned on again, the input side gets a pulse again, the output side adds one, which is controlled by it, and the different lights emit light