Uniformly light-emitting reflective backlight source

Abstract

The invention relates to the technical field of LED backlight sources, in particular to backlight source structural improvement of surface light-emitting display devices used for advertisement signboards, instruments, entertainment machines and the like and provides a uniformly light-emitting reflective backlight source which overcomes the technical shortcoming that an existing backlight source is large in power consumption, heavy, high in cost, non-uniform in light emitting and the like. The uniformly light-emitting reflective backlight source comprises at least one lighting unit, each lighting unit comprises a lampshade, an LED light source is arranged at the center of each lampshade, and a light diffusion plate is arranged at an opening of each lampshade. The uniformly light-emitting reflective backlight source is characterized in that each LED light source comprises an LED substrate, an LED lamp wick is arranged on the LED substrate, a bottom reflecting plate is arranged in a peripheral area of the LED lamp wick on the upper surface of the LED substrate, a top reflecting plate parallel to the bottom reflecting plate is arranged above the LED lamp wick, supporting legs are arranged at the edge of the top reflecting plate, the bottom ends of the supporting legs are connected with a fixing ring attached to the bottom reflecting plate, and the top reflecting plate, the supporting legs and the fixing ring are of an integrally formed structure. Besides, the lampshades, the bottom reflecting plates and the top reflecting plates are all made of PP (polypropylene) plastic material. The uniformly light-emitting reflective backlight source is energy-saving, lightweight, low-cost and convenient to mount, light loss during transmission in a light guide plate is avoided, and light emitting is uniform while thickness of the backlight source is decreased greatly.

Description

technical field [0001] The invention relates to the technical field of LED backlight sources, in particular to the improvement of the structure of the backlight sources of surface-emitting display devices used in advertising signs, instruments and entertainment machines. Background technique [0002] Existing advertising signs generally use fluorescent tubes, which have high power consumption, short service life, and relatively large thickness. [0003] The existing backlight using LED as the light source generally needs to use a light guide plate in order to make the light uniform, and the LED is irradiated from the side of the light guide plate. And non-absorbing high-tech materials, on the bottom of the optical-grade acrylic sheet, use UV screen printing technology to print light-guiding points. The optical grade acrylic sheet is used to absorb the light emitted from the lamp to stay on the surface of the optical grade acrylic sheet. When the light hits each light gu...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the purpose of the present invention is to solve the technical deficiencies of existing backlights such as large power consumption, bulkiness, high cost and uneven light output, and propose a reflective backlight with uniform light output

Images