White light LED lamp bead based on RGB tri-phosphor wafers

Abstract

The invention provides a white light LED lamp bead based on RGB tri-phosphor wafers. The white light LED lamp beads comprises a plurality of light-emitting units connected in parallel, each light-emitting unit comprises R wafers (Red) with amount of l, G wafers (Green) with amount of m, B wafers (Blue) with amount of n, and a zero-ohm resistor, wherein the R wafers, the G wafers, the B wafers andthe zero-ohm resistor are connected in series, and l, m and n satisfy the formula as shown in description, wherein the PhiR is the luminous flux of the R wafers, PhiG is the luminous flux of the G wafers, the PhiB is the luminous flux of the B wafers, and the l, m and n are positive integer. The use reliability and the quality index of the LED bead can be improved, the service life of the LED lampcan be prolonged, the color rendering index is improved, and the blue light pollution is reduced, thereby realizing the real green lighting.

Description

technical field [0001] The invention belongs to the technical field of white light LEDs, in particular to a white light LED lamp bead based on an RGB tricolor chip. Background technique [0002] Most of the white LED lamp beads on the market use blue LED chip plus phosphor to produce yellow light, and then synthesize white light from blue light + yellow light. Although it looks like white light, it is not really white light. This is caused by the fact that the human eye cannot correctly distinguish the spectral components. The outstanding shortcoming is the lack of red light components in the spectrum. Lamps are not used for viewing, but for lighting. Due to the lack of spectral components, the color will be distorted when lighting, which will cause visual fatigue and cause myopia. [0003] Second, the white LED lamp beads on the market have a high peak value of blue light, causing blue light pollution and adverse effects on vision. [0004] Thirdly, energy loss occurs wit...

AI Technical Summary

Problems solved by technology

This is caused by the fact that the human eye cannot correctly distinguish the spectral components. The outstanding shortcoming is the lack of red light components in the spectrum.

Lamps are not used for viewing, but for lighting. Due to the lack of spectral components, the color will be distorted when lighting, which will cause visual fatigue and cause myopia

[0003] Second, the peak value of blue light of white LED lamp beads on the market is very high, there is blue light pollution, and it also has adverse effects on eyesight

[0004] Third, the conversion of phosphors will cause energy loss and reduce the luminous efficiency

At the same time, the voltage of the lamp beads connected in parallel is the same, but the forward voltage of each lamp bead is not the same. A small difference in voltage will cause a large difference in current. If the current is large, the aging will be accelerated, and if the current is small, the luminous intensity will be weakened, resulting in dark areas. , but also seriously damage the quality of lamps and lanterns

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