Direct type backlight module light bar

Abstract

The invention discloses a direct type backlight module light bar and relates to the technical field of lighting. The direct type backlight module light bar comprises a PCB, LED surface-mounted lamp beads and lenses, wherein the LED lamp beads are attached to the surface of the PCB in an array mode through welding and are connected in series or in parallel through a circuit on the surface of the PCB, the lenses are arranged above the LED lamp beads in a covering mode, and a containing cavity is formed by the lenses and the PCB. A COB mirror aluminum layer is attached to the area where the cavity is mapped on the surface of the PCB and is made of high-reflectivity materials. The direct type backlight module light bar is simple in structure, reasonable in design and capable of effectively overcoming the defects in the prior art and improving the overall brightness of a backlight module.

Description

technical field [0001] The invention relates to the technical field of lighting, in particular to a direct-lit backlight module light bar. Background technique [0002] LED light bar is a semiconductor light-emitting technology. Its key features are small driving voltage, high luminous efficiency, energy saving and environmental protection. It is widely used in LCD display backlight, advertising modules, and commercial lighting fields. The general method of the LED light bar is to weld the LED patch lamp beads on the surface of the PCB board, and then attach the optical lens cover directly above the lamp beads to form a light-emitting cavity. Today, the application of LED light strips in backlight modules is to place the array of LED light strips on the bottom of the module backplane, and the light emitted by the LEDs is uniformly distributed in the backlight module through the secondary optical action of the lens. The light is refracted out, and then the light source is re...

AI Technical Summary

Problems solved by technology

[0003] The composition carrier of the LED light bar in the prior art: PCB board, the surface of which is mostly solder resist ink, because most of the light emitted by the LED is evenly refracted, but some light is reflected by the lens to the surface of the PCB board, because Most of the solder resist inks currently on the market have a reflectivity of 60% to 90%, so part of the light cannot be reflected into the lens to the maximum extent and then refracted by it, and finally the light emitted from the module passes through the upper film After the film is evenly injected, the brightness of the overall module will be lost. In the case that the brightness of the module cannot be achieved, to increase the brightness, it is necessary to increase the brightness of the LED lamp bead or add an optical film. Nowadays, These two improvements will increase the energy efficiency and cost of the backlight accordingly

Images