Backlight unit and light emitting module of modular lamp box

Abstract

The invention relates to a backlight unit and a light emitting module of a modular lamp box. The backlight unit is composed of an arrayed lamp hole module, a light-diffusing face mask and a light source module, wherein the arrayed lamp hole module is mounted with the light source module; the light-diffusing face mask is mounted on the front side of an arrayed lens module, and a face mask connecting rabbet is in straight cutting connection with a substrate connecting rabbet; and the light source module is mounted on the rear side of the arrayed lamp hole module, so that light sources on the front side of the light source module are placed in lamp holes in a substrate, no shelter is arranged around the backlight unit, and thus no obvious dark line appears around the backlight unit. The light emitting module comprises the backlight units and further comprises a box body, the multiple backlight units are mutually spliced and mounted on the front side of the box body according to arrays in the mode of corresponding to through holes in the mounting face, and when the multiple light emitting modules are spliced, no obvious dark line appears either. The backlight unit and the light emitting module of the modular lamp box have the advantages that light emitting is uniform, the structure is simple, and mounting and maintenance are convenient.

Description

technical field [0001] The invention relates to the field of light boxes, in particular to a backlight unit and a light emitting module of a modular light box. Background technique [0002] As we all know, there are two types of mainstream advertising light box structures: one is a light box with a side-type backlight structure, which is mainly composed of a light guide plate and a light source. Due to the limitation of light guide distance, the light box with side-type backlight structure is suitable for products with small light-emitting area, such as small-sized decorative paintings, window displays, flat panel lighting, etc. However, the two sides of the light guide plate Or there are light sources around, so that there are dark areas caused by the light source body on both sides or around the light guide plate, and shadowless splicing cannot be realized. The other is a light box with a direct backlight structure, which is mainly composed of a panel, a light source and ...

AI Technical Summary

Problems solved by technology

[0002] As we all know, there are two types of mainstream advertising light box structures: one is a light box with a side-type backlight structure, which is mainly composed of a light guide plate and a light source. Due to the limitation of light guide distance, the light box with side-type backlight structure is suitable for products with small light-emitting area, such as small-sized decorative paintings, window displays, flat panel lighting, etc. However, the two sides of the light guide plate Or there are light sources around, so that there are dark areas caused by the light source body on both sides or around the light guide plate, and shadowless splicing cannot be realized

The other is a light box with a direct backlight structure, which is mainly composed of a panel, a light source and a box body. The panel is installed on the front side of the box body, and the light source is installed on the back side of the box body. Therefore, the thickness of the light box of the direct-type backlight structure is much larger than that of the side-type backlight unit. Because it has the advantages of high brightness and strong controllability of the light source, the application of the direct-type backlight unit is extremely wide, such as Advertising light boxes, signboard light boxes, signboard light boxes and window light boxes, etc. However, the box of the direct-down backlight unit is surrounded by opaque box walls, and serious shadows will appear between the boxes after splicing. Unable to achieve shadowless splicing

It can be seen from the above that the current mainstream advertising light boxes are limited to small-format light boxes. Therefore, the existing large-format advertising in the field of outdoor advertising communication is still stagnant in the four mainstream outdoor carriers of inkjet advertising, three-sided advertising, LED display advertising and luminous character advertising.

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