Luminescent material, luminescent light-compensating film, retro-reflective light-compensating patch and road sign board

Abstract

The invention discloses a luminescent material, a luminescent light-compensating film, a retro-reflective light-compensating patch and a road sign board. The theoretical chemical composition of the luminescent material is M(1-x-y-z)Al2O4: xEu2+, 2xDy, yR3+, zPr3+, wherein M is one or more selected from Sr, Mg, Ca, and Ba; R is one or more selected from La, Nd, and Tb; the value of x ranges from 0.005 to 0.03; the value of y + z ranges from 0.01 to 0.06; and the value of z ranges from 0.0005 to 0.01. The luminescent light-compensating film, the retro-reflective light-compensating patch and theroad sign board all contain the luminescent material. The luminescent material disclosed in the invention is characterized in that the main wavelength of the luminescence spectrum thereof is 480-580 nm, and compared with a common luminescent material, the luminescent spectrum has improved initial luminance and increased viewing distance, and also an effect of prolonging the persistence. The luminescent light-compensating film, the retro-reflective light-compensating patch and the road sign board each manufactured from the luminescent material can effectively increase the viewing distance of human eyes with a good guiding effect, and also has the advantages of wide application fields, energy saving, safety, and low cost.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a luminescent material capable of improving the viewing distance, a luminescent supplementary light film, a retroreflective supplementary light sheet and a road signboard. Background technique [0002] In the prior art, the spectral energy of most artificial light sources is relatively low in the wavelength range of 480nm to 580nm. Cells are sensitive to the spectral wavelength of 507nm, so when the light environment lacks the spectral wavelength of 480-580nm, it will seriously affect the visual distance of the human eye. [0003] For example, when the spectrum of the above-mentioned artificial light source is applied to various types of current road signs and signs, when the car light shines on the reflective film or reflective prism, the spectrum of the car light is reflected, and the spectrum of these discontinuous wavelengths will affect the human eye. The visu...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the spectral energy of most artificial light sources is relatively low in the wavelength range of 480nm to 580nm. The spectral wavelength of the cell sensitivity is 507nm, so when the light environment lacks the spectral wavelength of 480-580nm, it will seriously affect the visual distance of the human eye

Images