With the emergence of white LED and the introduction of more technologies, it is currently used in household appliances and notebook computer indicators, automobile anti-fog lights, indoor lighting, electronic clocks, traffic indicators, medical beauty equipment, electronic teaching equipment, urban lighting, etc. Lighting equipment is becoming more and more prosperous, and the application of LED is becoming more and more common. 2835 SMD LED lamp beads are one of them. yyb Optoelectronics' 2835 SMD LED lamp beads are packaged with high-definition environmentally friendly silica gel and big brand chips. The size is 3.5*2.8*0.8mm, and there are white, red, yellow and green. , orange, blue, purple, pink, etc. can be customized in various colors.

 In 1955, Rubin Braunstein of Radio Corporation of America discovered the infrared emission effect of gallium arsenide (GaAs) and other semiconductor alloys, and in 1962 Nick Holonyak Jr of General Electric Company (GE) developed Visible light LEDs. However, the real take-off of LED is only after the emergence of white LED in the 1990s, and it has gradually been paid attention to, and the application field has become more and more extensive. LED is the abbreviation of Light Emitting Diode (Light Emitting Diode), usually we also call it Light Emitting Diode. This kind of semiconductor component has been generally used as an indicator light and display panel since its development, but now with the continuous advancement of technology, it can be used as a light source, which can not only directly convert electrical energy into light energy with high efficiency, but also has the longest It has a service life of tens of thousands of hours to 100,000 hours, and it will not be fragile and consume high power like traditional light bulbs. LED has the advantages of being environmentally friendly, mercury-free, small in size, can be used in low temperature environments, light source has directionality, causing less light pollution and rich color gamut.

          The material used in the world's first LED is gallium arsenide (AsGa), the operating voltage is 1.424V, and the light it emits is infrared spectrum. Later, the industry developed gallium phosphide (PGa) as the material of LED, the working voltage is 2.261V, and the light emitted is green light. The industry has used the materials required for these two types of LEDs to prepare LED products with all wavelengths in the range from infrared to green, and developed common red LEDs, yellow LEDs, orange LEDs, etc. The three types of LEDs are called 3-element LEDs because they use gallium, arsenic, and phosphorus, while blue LEDs, green LEDs, and infrared LEDs are called 2-element LEDs. Later, 4-element LEDs were developed using a mixture of four elements, aluminum (Al), calcium (Ca), indium (In), and nitrogen (N), which can emit light in the entire visible light range and part of the ultraviolet spectrum.

Because of the different manufacturing materials of 2835LED, the energy of the generated photons