1. The light-emitting principle based on LED chips
The basis for LED neon light to achieve multiple colors lies in the light-emitting principle of the LED chip itself. LED (light-emitting diode) is a semiconductor device whose light emission is generated by the release of energy by the recombination of electrons and holes. LED chips of different materials will emit light of different wavelengths when electrons and holes recombine, thus presenting different colors.
For example, LED chips made of gallium nitride (GaN) materials usually emit blue light, while LED chips made of gallium arsenide (GaAs) materials emit red light. For LED neon light, by selecting LED chips of different materials, a variety of basic colors, such as red, blue, and green, can be directly obtained. These basic colors are the cornerstones for achieving rich color changes, and the light-emitting colors of LED chips are highly stable and accurate, providing a guarantee for the accurate presentation of various colors.
2. Using multi-chip combination technology
In order to achieve more diverse colors, LED neon light often uses multi-chip combination technology. The LED chips of the three basic colors of red, green, and blue are encapsulated in the same lamp bead or lamp tube. By changing the ratio of the luminous intensity of the three color chips, almost all visible colors can be mixed.
For example, when the red and green chips emit light at the same intensity, the human eye sees yellow light; when the red, green and blue chips all emit light at the same intensity, white light will appear. The advantage of this technology is that it can accurately control the mixing and changing of colors. Through the electronic control system, dynamic color gradients, flickering and other effects can be achieved to meet various complex visual needs, such as color changing effects in stage lighting, advertising display and other fields.
3. Using phosphor conversion technology
In addition to the above methods, phosphor conversion technology is also an important means for LED neon light to achieve multiple colors. When phosphors are coated on the LED chip, when the light emitted by the chip is irradiated on the phosphors, the phosphors absorb part of the light energy and convert it into light of other wavelengths, thereby changing the color of the light.
Take the blue LED chip as an example. When yellow phosphors are coated on its surface, the blue light excites the yellow phosphors, and the blue light and yellow fluorescence are mixed, and the human eye sees white light. By selecting different types and proportions of phosphors, the light emitted by the LED chip can be converted into various colors. Moreover, this technology can make LED neon light obtain softer and more uniform color effects while maintaining high brightness, and is often used in scenes that require high-quality lighting and color performance, such as signboard lighting and decoration of commercial stores.
4. Color control and adjustment system
The diversified presentation of LED neon light colors is also inseparable from the color control and adjustment system. The system uses electronic circuits and software algorithms to accurately control the light emission of LED chips or phosphors. In terms of hardware, the drive circuit can adjust the current size and pulse width input to the LED chip, thereby changing the light emission intensity of the chip.
In terms of software, the intelligent control system can preset various color modes and change effects, and adjust the light emission parameters of different color chips according to the set program through the microcontroller. For example, in the decoration of festival celebrations, the LED neon light can be controlled by a mobile phone APP or remote control to flash according to the preset color sequence and rhythm, creating a joyful and festive atmosphere, so that the LED neon light can present just the right color effect in different application scenarios.
