Imitation sodium yellow LED lamp beads and preparation method thereof

Abstract

The invention discloses a sodium yellow light-imitated LED lamp bead. The sodium yellow light-imitated LED lamp bead comprises fluorescent powder, glue A, glue B, a chip and a bracket, wherein the fluorescent powder comprises the following components in parts by mass: 0-1 part of green powder with the emission wavelength being 515-525nm, 0-1 part of yellow green powder with the emission wavelengthbeing 540-550nm, 0.2-1.5 parts of yellow powder with the emission wavelength being 575-585nm, and 0-0.5 part of orange yellow powder with the emission wavelength being 590-610nm. The sodium yellow light-imitated LED lamp bead disclosed by the invention can be excited by ultraviolet light, and the color purity of the lamp bead can reach more than 95%; the lamp bead has high luminous efficiency, and the luminous efficiency is not less than 130lm / W; the lamp bead has the luminescence stability of a light source, and after one year of use, the light attenuation of the sodium yellow light-imitatedLED lamp bead is not less than 5%; the power is 0.5W-1.0W, so that the sodium yellow light-imitated LED lamp bead is suitable for the application of road lamps, tunnel lamps, square lamps and other lamps; and the sodium yellow light-imitated LED lamp bead has higher penetrability characteristics in rainy and foggy weather, and has better discrimination and visual friendliness for the driving of drivers.

Description

technical field [0001] The invention belongs to the technical field of LED lighting, and in particular relates to a high-penetration sodium-imitation yellow LED lamp bead and a preparation method thereof. Background technique [0002] At present, lighting fixtures in the LED industry, especially street lamps, mainly have three types of LED light sources, one is a cool white light source with a relatively high color temperature (above 6800K), although the light efficiency of this LED light source is relatively higher ( 160lm / W), but its color rendering is very poor, the highest Ra is only around 70; the second category is that the color temperature is around 4500K-5500K, its color rendering Ra can reach around 80, and the light efficiency can reach 140lm / W; The third type is warm white LED light source, the color temperature CCT is 2500K-3500K, the color rendering Ra can reach above 85 or even 95, but the light efficiency is very low (mostly lower than 100lm / W). These three ...

AI Technical Summary

Problems solved by technology

[0007] Compared with high-pressure sodium lamps, LEDs have many advantages, such as higher color rendering index, better luminous efficiency, and longer life, but the fog penetration ability of LED lamps is average, while the fog penetration ability of high-pressure sodium lamps is extremely strong. It is suitable for cities in the north that are prone to smog weather, and LED lights have a lot of shortcomings in this respect

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