Long-afterglow retroreflector with excitation light sources

Abstract

A long-afterglow retroreflector with excitation light sources comprises a transmitting layer (1). One part of the transmitting layer (1) is a reflecting part with a microprism retroreflection layer, and the other part of the transmitting layer (1) is a transmitting part without any microprism retroreflection layer. A long-afterglow luminescent material (3) is arranged on or under the bottom surface of the transmitting part, external light source excitation is received from above through the transmitting part, and afterglow luminescence is conducted from inside through the part; the excitation light sources (6) are arranged under the long-afterglow luminescent material (3), intermittent excitation in a certain cycle and duty ratio of the excitation light sources (6) is received from below, the afterglow maintenance luminance is greatly improved under the condition of small power consumption, and the application range is expanded. The product of the embodiment can be assembled in advance to serve as a module, or components of the product are installed on a luminescent device in several times to be used for making various road signs or mobile signs or reflective crafts or the like.

Description

technical field [0001] The invention relates to the field of traffic security equipment, in particular to a long afterglow retro-reflector with an exciting light source. Background technique [0002] Retroreflector, also known as reflective sheet, reflective lattice or directional reflector, is a reflective sign with retroreflective function; the main material is plastic or resin such as PMMA, PC, etc., and generally adopts injection molding, injection molding or compression molding. Processing and molding; there are also some commercially available prism films pasted on the panel to make simple retro-reflectors, which can be used as components to manufacture various traffic signs (such as road studs, outline signs, guide signs, reflective warning signs, construction signs) etc.), removable signs (such as bicycle reflective signs, car reflective signs), reflective handicrafts, etc., are widely used. [0003] The retro-reflector mainly uses the microprism array inside the re...

AI Technical Summary

Problems solved by technology

[0004] Traditional retro-reflectors have been widely used in the field of road traffic security, and have formed relevant national standards and industry norms, but they have obvious shortcomings: that is, they can only passively reflect the lights of passing vehicles, and the reflective brightness is affected by the luminescence of vehicle lights. Limitation of angle and distance; it cannot actively emit light; its main service object is motor vehicle drivers, and when there is no external light source, it can guide or induce pedestrians and non-motor vehicle drivers

However, there are following fatal problems in this method: 1. The long afterglow luminescent material is arranged on the bottom of the reflective sheet, which acts as a reflective base layer objectively; but due to the limited chromaticity of the long afterglow luminescent material, it is not suitable for serving as a reflective base layer, can not make good use of the repeated reflection of the leakage of the microprism layer, so the reflective performance is weakened; Therefore, the long afterglow luminescent material cannot be fully excited; b. After the light emitted by the long afterglow luminescent material is reflected and refracted by the microprism array of the retro-reflector, the afterglow brightness is greatly weakened; especially in the main reflection of the microprism layer In other directions, due to the angle of the microprism layer, the afterglow can be seen in a small viewing angle range, so the long afterglow viewing angle is limited to In a very small range; therefore, compared with the attenuation of the reflective function, the luminous performance of the long-lasting luminescent material is more fatally affected. Therefore, its luminous performance and reflective performance are greatly reduced and cannot meet national standards and industry requirements. limited use value

[0008] Moreover, the above method relies solely on the ambient light to excite the long-lasting luminescent material. Since the ambient light is usually not enough to fully excite the long-lasting luminescent material, the afterglow brightness is low. Therefore, the use effect is not ideal, and the scope of application is greatly limited.

[0009] Most of the current traditional retro-reflectors have no light-emitting function; although the existing long-afterglow retro-reflectors can emit afterglow, they are only naturally excited by ambient light. Great restrictions, seriously hindering the popularization and promotion of long afterglow retro reflectors

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