Uniform illuminating device

Abstract

The invention provides a uniform light-emitting device which comprises light-emitting diodes and a light-reflecting cover. Each light-emitting diode is a single-side light-emitting type light-emitting diode, and the light-reflecting cover is a diffused reflection light-reflecting cover. At least three single-side light-emitting type light-emitting diodes are arranged in a circle according to the shape of the light-reflecting cover in the light-reflecting cover, and the light-emitting faces of the light-emitting diodes face to the outside of the circle and are opposite to the light-reflecting cover. The direction position of the single-side light-emitting type light-emitting diodes is adjusted according to needed direction, and the single-side light-emitting type light-emitting diodes irradiate the light-reflecting cover with a proper distance and an incidence angle, then illumination of corresponding irradiated region on the light-reflecting cove is adjusted, and light irradiating the entire side wall of the light-reflecting cover is further more uniform. Meanwhile, colors corresponding to the light-emitting diodes are selected, the light-emitting intensity of various light-emitting diodes is controlled, and any required light color can be mixed. In addition, after the diffused reflection light-reflecting cover is adopted, light emitted by the light-emitting diodes irradiates the surface of the diffused reflection light-reflecting cover and is scattered completely, all of the light shines to a translucent screen, and the utilization rate of the light energy is high.

Description

technical field [0001] The invention belongs to a light emitting device, in particular to a uniform light emitting device using a light emitting diode as a light source. Background technique [0002] Luminous objects can attract people's attention. Businesses often use signboard light boxes to attract customers or advertise. Architects and lighting designers design luminous ceilings, luminous walls, and luminous facades of buildings based on this concept. The basic structure of this type of lighting system is to install a translucent light-transmitting screen on the front side of the light source to allow light to pass through the light-transmitting screen to create an elegant atmosphere, or to transmit images or information on the light-transmitting screen to people. . [0003] The above lighting systems usually use incandescent lamps, fluorescent lamps or neon lamps as light sources. As we all know, some of these light sources have low luminous efficiency, high power con...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the above-mentioned signboard light box system is that only one light-emitting diode is installed in the reflector, and its power is relatively large. For irregular-shaped light-emitting covers, due to the fixed irradiation direction of the light-emitting diodes, dark corners will appear on the side walls of the light-emitting cover, and the light Unable to uniformly illuminate all corners of the side wall of the light cover

And this opaque layer blocks part of the light emitted by the light-emitting diode, reduces the luminous efficiency of the light-emitting diode, causes the luminous flux to reduce, and wastes energy; as for the paint layer directly coated on the concave surface, it not only has the above-mentioned shortcomings, but also affects the heat dissipation of the light-emitting diode , especially will force the light back into the light-emitting diode, causing the temperature of the light-emitting diode to rise and shorten the service life

[0006] In addition, the light emitted by the light-emitting diodes is reflected by the reflector and forms a bright halo on the light-transmitting screen, which makes the light-emitting devices in the signboard light box system unable to provide uniform illumination, which seriously affects the effect of the entire system

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