TWI398593B - Double-sides lighting device - Google Patents

Description

Double-sided lighting device

The present invention relates to a lighting device, and more particularly to a lighting device that can emit light on both sides.

At present, most common LED lighting devices are an LED light source module. Since the illumination angle of a single LED light source module is narrow, the illumination angle is limited. When large-angle double-sided illumination is required, it is necessary to set a plurality of LED light source modules, or integrate multiple LED light source modules to achieve double-sided illumination.

In view of this, it is necessary to provide a lighting device that can achieve double-sided illumination using only one light source module in one direction.

A double-sided illuminating device comprises a casing, a circuit board and an optical film which are sequentially assembled, a surface of the circuit board facing the optical film is provided with a illuminating member, the illuminating member is electrically connected to the circuit board, and the optical film has reflection and transmission characteristics The housing is made of a translucent or transparent material, and the circuit board is provided with a through hole through which the light reflected by the optical film is irradiated onto the housing. When the double-sided illumination device of the present invention is in operation, the illumination effect of the double-sided illumination can be achieved by using only the illumination module in one direction.

Referring to FIGS. 1 and 2, the double-sided light-emitting illumination device 100 includes a housing 10, a circuit board 20, and an optical film 30 that are sequentially assembled.

The housing 10 is made of a translucent or transparent material.

The surface of the circuit board 20 facing the optical film is provided with a light-emitting component 21, and the light-emitting component 21 is electrically connected to the circuit board 20, and the circuit board 20 is provided with a through hole 22. In the present embodiment, the illuminating member 21 is a light-emitting diode (LED), and the illuminating member 21 is spaced apart from the through hole 22.

The optical film 30 has reflection and transmission characteristics, and the optical film 30 is a brightness enhancement film or a reflection sheet, and the light reflected by the optical film 30 is irradiated onto the casing 10 through the through hole 22.

In the present embodiment, the double-sided illumination device 100 further includes a diffusion sheet 40. The diffusion sheet 40 is characterized in that diffusion is generated when the light is transmitted, and the distribution of the light is uniformized. The diffusion sheet 40 is mounted on the optical film 30 away from the optical film 30. One side of the circuit board 20.

Referring to FIG. 3, when the double-sided illumination device 100 is in operation, for example, the emitted light S1 of the light-emitting member 21 is irradiated onto the optical film 30, and a portion thereof is transmitted by the optical film 30, and the transmitted light S2 is formed through the diffusion sheet 40 as a front surface. The light source is partially reflected by the optical film 30 to form a reflected light S3 which is incident on the transparent or translucent casing 10 through the through hole 22 in the circuit board 20 to form a back light source.

The double-sided light-emitting illumination device 100 of the present invention can achieve the illumination effect of double-sided illumination, thereby expanding the light-emitting angle. It is also possible to appropriately add a component having a diffused light angle in front of the two light-emitting directions to achieve full-angle light output.

It should be noted that the above-described embodiments are merely preferred embodiments of the present invention, and those skilled in the art can make other changes within the spirit of the present invention. These changes in accordance with the spirit of the present invention should be included in the requirements of the present invention. Within the scope of protection.

100‧‧‧Double-sided lighting device

10‧‧‧shell

20‧‧‧ boards

21‧‧‧Lighting parts

22‧‧‧through hole

30‧‧‧Optical diaphragm

40‧‧‧Diffuser

1 is an exploded view of a perspective view of a double-sided light-emitting illumination device according to an embodiment of the present invention.

2 is an exploded view of another perspective of the double-sided illumination device of FIG. 1.

3 is a schematic view of the optical path of the double-sided light-emitting illumination device shown in FIG. 1.

100‧‧‧Double-sided lighting device

10‧‧‧shell

20‧‧‧ boards

21‧‧‧Lighting parts

22‧‧‧through hole

30‧‧‧Optical diaphragm

40‧‧‧Diffuser

Claims (5)

A double-sided illuminating device comprises a casing, a circuit board and an optical film which are sequentially assembled, a surface of the circuit board facing the optical film is provided with a illuminating member, the illuminating member is electrically connected to the circuit board, and the optical film has reflection and transmission characteristics The improvement is that the housing is made of a translucent or transparent material, the circuit board is provided with a through hole, and the light emitting member is spaced apart from the through hole, and the light reflected by the optical film is irradiated to the housing through the through hole. on. The double-sided illuminating device of claim 1, wherein the illuminating member is a light emitting diode. The double-sided illumination device of claim 1, wherein the optical film is a brightness enhancement film. The double-sided light-emitting illumination device of claim 1, wherein the optical film is a reflective sheet. The double-sided illuminating device of any one of claims 1 to 4, wherein the double-sided illuminating device further comprises a diffusion sheet mounted on a side of the optical film away from the circuit board.