High color gamut blue-green LED backlight module and manufacturing method thereof

Abstract

The invention discloses a high color gamut blue-green LED backlight module and a manufacturing method thereof. The backlight module comprises blue-red LED light beads, green light LED lamp beads, a PCB, a metal back board, reflective paper, a lower light guiding board, an upper light guiding board, a diaphragm, and an OPEN CELL; the PCB is a rectangular strip-shaped circuit board, and the two rowsof LED lamp beads are welded to the PCB; the blue-red LED lamp beads and the green light LED lamp beads are correspondingly located in the upper row and the lower row; four strip-shaped PCB welding points perpendicular to the short edge are arranged on one side of the PCB; and the back side of the PCB is attached to the inner side of the short edge of the L-shaped metal back board, the reflectivepaper is stored on the inner layer of the long edge of the metal back board, and the lower light guiding board, the upper light guiding board, the diaphragm and the OPEN CELL are stored on the upperportion of the reflective paper in sequence. According to the high color gamut blue-green LED backlight module and the manufacturing method thereof, the color gamut value is improved, and meanwhile, the technical problem of uneven light mixing of a blue light chip and a red light chip is solved; and in addition, an upper concentrating lens and a lower concentrating lens with an upper reflective layer and a lower reflective layer can be additionally arranged, so that red-blue light and green light are not subjected to light mixing and interference before entering the lower light guiding board and the upper light guiding board.

Description

technical field [0001] The invention relates to the field of LED backlights, in particular to a blue-green LED backlight module with high color gamut and a manufacturing method thereof. Background technique [0002] As an emerging solid-state lighting source, LED has the characteristics of small size, long life, good reliability, energy saving and environmental protection, and has been widely used in lighting and display fields. With the rapid development of LED backlight technology, consumers have high expectations for LED TVs. The demand for color gamut and other aspects is increasing day by day, requiring richer colors, better layering, and higher color reproduction. The current mainstream method is to use blue light chips to excite red and green phosphors, and the highest color gamut can only reach 90%-93%. The green chip has a narrower half-wave width and shorter wavelength than existing green phosphors. In addition, the excitation efficiency of phosphor powder is low...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a blue-green LED backlight module with high color gamut and its manufacturing method, which solves the problem of uneven light mixing between the blue light chip and the red light chip while improving the color gamut value. technical problem

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