LED flat light source structure

Abstract

The invention discloses an LED flat light source structure, which comprises an aluminum substrate; the aluminum substrate is adhered with a reflective membrane and is provided with a plurality of luminous bodies; the front of the plurality of the luminous bodies is provided with a light guide plate for diffusing light; the front of the light guide plate is provided with a diffuse transmission plate; and the wall of the light guide plate close to the luminous bodies is provided with freedom surfaces which correspond to the luminous bodies and are used for refracting the light. Illuminators with the two-dimensional and rotationally symmetrical freedom surfaces refract the light so as to increase the radiation area of LED point sources and reduce the glare effect; the LED luminous bodies and the illuminator are arranged one-to-one, so that the flat luminous source structure is changeable according to the actual requirement, is convenient to extend, and can be used in a plurality of occasions.

Description

technical field [0001] The invention relates to the technical field of semiconductor lighting, in particular to an LED planar light source structure. Background technique [0002] After the electric light source has gone through the three stages of incandescent lamp, fluorescent lamp and high-intensity gas discharge lamp, people now generally believe that LED electric light source is the most promising new light source. It has the advantages of high brightness, good directionality, and fast reflection speed. More importantly, LEDs have huge advantages in terms of power consumption and lifespan. With the continuous improvement of LED manufacturing technology, its luminous efficacy continues to rise. Up to now, the luminous efficacy of high-power white LEDs has reached 100lm / w, and the luminous efficacy of stable products is also above 90lm / w. This light effect makes the application of LED more and more widely, including the field of backlight that has been widely used and th...

AI Technical Summary

Problems solved by technology

[0004] At present, LED light sources are used in planar light sources, such as in the field of backlights. In the field of backlights, they can be divided into side-light and direct-light structures according to the distribution of light sources. Increase, the difficulty of optical design of the side-light type also increases, the biggest disadvantage of the side-light type is that the light utilization rate of the light source is very small, only about 50%, and LED is used in the ceiling lamp, which is relatively rare at present, occasionally The products that can be seen are simply adding a frosted glass or a diffuse reflection plate on the surface, but the effect is not very obvious, and it cannot fundamentally solve the problem of uneven brightness distribution

Images