High-color gamut direct-lit backlight module with uniform light mixing

Abstract

The present invention discloses a high-color gamut direct-lit backlight module with uniform light mixing. The high-color gamut direct-lit backlight module comprises a metal back plate, a PCB plate group, an LED lamp bead, a lens, a reflection sheet, a diffusion plate, a diaphragm and a liquid crystal panel. The PCB plate group is fixed on the metal back plate; the PCB plate group is respectively provided with a PCB plate 1 and a PCB plate 2; and the reflection sheet is arranged on the upper surface of the metal back plate. The high-color gamut direct-lit backlight module provided by the present invention has the beneficial effects that, by using the blue and green dual-chip matching the red phosphor, the high-color gamut direct-lit backlight module is simpler than the R, G and B three-color LED in structure, and the process is relatively easy to implement. According to the high-color gamut direct-lit backlight module provided by the present invention, a symmetrical pad is used to fix the blue chip and the green chip therein, a part of the blue light excites the red phosphor, and then the blue light and the green light emitted by the chip, and the red light generated by exciting thephosphor are combined to obtain a high-color gamut LED direct-lit backlight source; and by using the symmetrical pad bracket, the produced LED lamp bead can be used in the direct-lit backlight moduleto achieve a uniform light mixing effect, at the same time, the heat dissipation can be increased, and the reliability of the LED lamp bead can be improved.

Description

technical field [0001] The invention relates to a backlight module, in particular to a high-color gamut direct-lit backlight module with uniform light mixing, and belongs to the technical field of backlight module applications. Background technique [0002] As a new 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 the field of lighting and display. However, with the rapid development of LED backlight technology, consumers' demand for high color gamut of LED TVs is increasing day by day, requiring them to have richer colors, better layering, and higher color reproduction. The current mainstream method is to use blue chips to excite red and green phosphors, and the highest color gamut can only reach 90%-95%. In addition, the color gamut of NTSC can be further improved by using blue chips, green chips with red phosphor powder, and red, green, and blue LED...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that in the conventional direct-lit backlight module solution, the high color gamut LED lamp beads with blue chips and green chips and red phosphors cannot achieve uniformity regardless of whether they are matched with reflective lenses or refractive lenses. The effect of mixed light causes the problem of red and blue stripes on the screen, and a high color gamut direct-type backlight module with uniform light mixing is proposed

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