Side-in type backlight source based on sinking cup type LED lamp beads

Abstract

The invention discloses a side-in type backlight source based on sinking cup type LED lamp beads. The high-color-gamut LED lamp beads provided with a blue chip, a green chip and red fluorescent powderin a matched mode are utilized, and the color gamut is up to 100-120%. In addition, only one kind of fluorescent powder needs to be excited, so that the target performance of a product is more easilycontrolled; the structure composed of the blue chip, the green chip and the red fluorescent powder is simpler than R, G, B three-color LEDs, and the technology is easy to implement. Compared with a quantum dot membrane and a quantum dot tube, the backlight source has the advantages of being good in stability, low in cost and the like while the color gamut is ultrahigh. Meanwhile, the blue chip and the green chip are arranged in a sinking cup of an LED lamp bead support, and the distance between the chips and the fluorescent powder is increased, so that the optical path between the fluorescentpowder and blue and green light emitted by the chips is increased, and the light mixing effect is optimized; the green chip is independently arranged in a groove, and a height difference is formed between the green chip and the blue chip, so that the blue light is prevented from being shielded by the green chip, uniform dispersion is achieved, and the light mixing effect of the LED lamp beads isbetter.

Description

technical field [0001] The invention belongs to the technical field of LED backlights, and relates to a side-entry backlight, in particular to a side-entry backlight based on sinking cup-type LED lamp beads. 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. It has been widely used in many high-efficiency solid-state photonic fields and daily life, such as lighting, backlight, signal Display, car lights, large-screen display lights and other fields. [0003] With the rapid development of LED backlight technology, consumers' demand for LED high color gamut displays 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 light chips to excite yellow phosphors to realize white light LEDs. Another mainstream technology to achieve high color ...

AI Technical Summary

Problems solved by technology

[0005] ①The current commercial phosphors are mostly YAG powder or silicate phosphor, nitride phosphor, fluoride phosphor, KSF phosphor, β-SiAl ON, and the color gamut can only reach 72%-93%;

[0006] ②The excitation efficiency of phosphor is low, and the improvement of color gamut can only be achieved by increasing the dosage, which is far from meeting the requirements of today's society for lower energy consumption, higher energy efficiency and higher color gamut, and the color purity of red phosphor is not high , the NTSC color gamut value can never break through 100%;

[0007] ③R, G, B three-color LED chips are difficult to mix light, and there are also problems with heat dissipation, and the drive control system is more complicated;

[0008] ④Current commercial quantum dot materials are easily affected by temperature and humidity and lead to failure. At the same time, due to the complex preparation process of quantum dots, low output, poor stability, and high price, they have not been fully popularized;

[0009] ⑤ After the blue and green chips are placed side by side in a flat cup type bracket, because the height of the blue and green chips is basically the same, part of the blue light will be blocked by the green chip, so that it cannot be evenly dispersed, resulting in poor light mixing effect of LED lamp beads

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