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Compared with the traditional DC LED power chip, the HV LED chip has the advantages of low packaging cost, high warm white light efficiency, high driving power efficiency and low line loss. Ai Changtao, the manager of Diyuan Optoelectronics, told Gao Gong LED reporter .
The traditional DC LED chip works at high current and low voltage. In order to increase the voltage, the integrated package (COB) structure is adopted, that is, multiple chips are connected in series and parallel, and the HV LED realizes the serial connection of microcrystals directly at the chip level. To make it work at low current and high voltage, it will simplify the chip solid crystal, the number of bonding, and reduce the packaging cost.
At the same time, the HV chip forms multiple micro-die integrations per unit area, and the COB is integrated by several chips, which avoids the consistency problem caused by wavelength, voltage and brightness span in the BIN between chips; the HV LED chip is The power chip driven at a small current can be integrated with the red LED chip + yellow phosphor to form warm white light, and the warm white light formed by the traditional DC LED + red phosphor + yellow phosphor has high light-emitting efficiency, shortening the brightness of the LED and The gap between light and white package light effect is easier to realize the high index of the light source; HV LED is easy to realize the working voltage of the packaged product is close to the mains due to its high working voltage, which improves the conversion efficiency of the driving power supply; Line losses in finished applications will also be significantly lower than traditional DC power LED chips.
The HV high-voltage chip independently developed by Diyuan Optoelectronics has a mass production efficiency of 115 lm/W, a theoretical luminous efficiency of 130 lm/W, and a luminous efficiency of about 10%. The light output power attenuation is less than 1000 hours. 2%. Tests have proved that the HV high voltage chip and the DC power core LED chip have the same stable and reliable photoelectric performance, reaching the advanced level of similar products.
HV high voltage chips will become an important direction for the development of LED lighting in the future. In the future, Diyuan will develop into semi-polarized and non-polarized epitaxial growth technologies. It is understood that the current wafers have been supplying HV LED chips in bulk. 
[High-tech LED News] On June 28th, Wuhan Diyuan Optoelectronics Technology Co., Ltd. held the HV high-voltage LED chip technology exchange meeting in Shenzhen, becoming the first domestic manufacturer to realize the mass production of HV high-voltage blue-light chips.