LED light source, preparation method thereof and backlight module

Abstract

The invention relates to an LED light source and a preparation method thereof and a backlight module, and belongs to the technical field of display. The LED light source comprises a light source substrate, a green light chip, a blue light chip and packaging glue. The green light chip and the blue light chip are fixedly arranged at the upper end of the light source substrate, the green light chip and the blue light chip are both electrically connected with the light source substrate. The packaging glue is fixedly arranged at the upper end of the light source substrate, the green light chip and the blue light chip are packaged in the packaging glue, diffusion powder is mixed in the packaging glue, and the diffusion powder can perform primary scattering on light rays emitted by the green light chip and the blue light chip. Compared with the prior art, the light emitting angle of the LED light source can be increased, the cost is reduced, and the service life of the backlight module is prolonged.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an LED light source, a preparation method thereof, and a backlight module. Background technique [0002] With the pursuit of the ultimate TV display effect by customers and the market, the display effect of conventional LCD TVs can no longer meet the needs of users. Therefore, TV display screens are gradually shifting from direct-lit backlight LCD screens to those with higher color purity and higher color gamut coverage. Higher efficiency, higher brightness and transition to Mini LED quantum dot displays with local dimming. [0003] Among the three quantum dot materials of red, green, and blue, the luminous efficiency and stability of red quantum dots are the highest, followed by green, and blue is the lowest. Based on this, the electroluminescent display scheme cannot be realized at this stage, that is, the display scheme that simultaneously utilizes three quantum dot ...

AI Technical Summary

Problems solved by technology

This solution has the following problems: the light is mainly emitted from the top of the light source, showing a phenomenon that the center is bright and the surroundings are dark, that is, the luminous angle of the light source is small; wherein, the brightness of the middle part accounts for about 80% of the total brightness of the light source, and the brightness of the surroundings is about 80% of the total brightness of the light source. It accounts for about 20% of the total brightness of the light source, and the luminous angle of the light source is about 140°, which leads to uneven brightness and darkness of the quantum dot display

In order to obtain a uniform surface light source, not only the light source spacing is required to be small enough (the light source spacing in the prior art solution is usually 3mm to 5mm), but also the number of light sources in the LED light source array is sufficient, and the larger the quantum dot TV needs. The more, and the use of a thicker diffuser (the thickness of the diffuser in the prior art solution is usually 2.5mm, 2mm, etc.), which leads to the high cost of the Mini LED display

[0006] like image 3 As shown, it is the backlight module of the Mini LED quantum dot display in the prior art, which is mainly composed of the light source substrate carrying the Mini LED light source array + LED light source + diffusion sheet + red quantum film + green quantum film, and the green quantum film Insufficient stability, severe light decay during use, resulting in short life of the whole machine

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