Light emitting device, down-illuminated lamp and light guide plate for down-illuminated lamp

Abstract

A light emitting device, a light-downward lamping tool, and a light guiding plate employed by the light-downward lamping tool. The light emitting device comprises a light source unit, the light guiding plate for transmitting the light of the light source unit and a reflective sheet; the reflective sheet reflects the light coming from the light guiding plate back to the light guiding plate, comprises a plurality of reflective micro-structures protruding towards the light guiding plate, and each reflective micro-structure is provided with a vertical angle a (90 <=a<=170 degrees). The reflective sheet is provided with the micro-structures with good reflective effect, and combined with the proper vertical angle design of the reflective micro-structure, the reflective lights can be uniformly guided to a needed light emitting angle. The light emitting device can be applied in the light-downward lamping tool or other light emitting equipment.

Description

technical field [0001] The present invention relates to a light-emitting device, a lamp and a light guide plate, in particular to a light-emitting device using a light-emitting diode (LED) as a light source, a down-illuminated lamp with the structure of the light-emitting device and a lamp used for the down-illuminated lamp light guide plate. Background technique [0002] refer to figure 1 , figure 2 , is a lighting device 1 disclosed in Taiwan Patent No. I329182, comprising: a roughly bowl-shaped lampshade 11, a socket 12 locked in the lampshade 11, and a socket set around the lampshade 11 The light guide plate 13 between the socket 12 , a reflective layer 14 attached to the inner surface of the lampshade 11 , and a plurality of LEDs 15 mounted on the socket 12 and facing the light guide plate 13 . The light emitted by the light-emitting diode 15 is guided by the light guide plate 13, mixed in the light guide plate 13, and then reflected downward by the reflective layer...

AI Technical Summary

Problems solved by technology

[0003] Although the lighting device 1 of the prior art can reflect the light downward for illumination, because the controllability of the light guide plate 13 and the reflective layer 14 to the light angle of the light is not good, the reflection angle of the reflected light is relatively large, resulting in The light emitted from the bottom presents a diffused angle, which cannot be concentrated within the angle range required by general lighting fixtures

Images