Light-emitting unit, display device and preparation method of light-emitting unit

Abstract

The invention relates to a light-emitting unit, a display device and a preparation method thereof. The light emitting unit includes: a passive backplane; the first LED chip is positioned on the front surface of the passive back plate; the second LED chip is positioned on the front surface of the passive back plate; the third LED chip is located on the second LED chip; the first LED chip and the second LED chip are both blue light LED chips and the third LED chip is a green light LED chip, or the first LED chip and the second LED chip are both green light LED chips and the third LED chip is a blue light LED chip; the color conversion material layer covers the first LED chip; and the plurality of anode back extraction electrodes penetrate through the passive back plate from the back surface of the passive back plate. According to the light-emitting unit, the size of the Micro-LED structure is reduced, and it is ensured that the light-emitting unit still has high red light external quantum efficiency under the condition that the light-emitting unit has the small size.

Description

technical field [0001] The present disclosure relates to the field of display technology, and in particular, to a light-emitting unit, a display device and a preparation method thereof. Background technique [0002] Compared with liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs), Micro-LED chips have advantages in terms of brightness, resolution, contrast, energy consumption, service life, response speed and Thermal stability and other aspects have greater advantages and are generally considered to be the core of next-generation display technology, and have great application prospects in watches, TVs, projection, virtual reality, augmented reality, mixed reality and other fields. [0003] In the field of Micro-LED, colorization is a very big challenge. At present, the mainstream Micro-LED colorization technologies include: three primary colors, color conversion, prism combination and other solutions. The colorization is basically based on three colors ...

AI Technical Summary

Problems solved by technology

[0003] In the field of Micro-LED, colorization is a very big challenge. The current mainstream Micro-LED colorization technology includes: three primary colors, color conversion, prism light combination and other solutions, and its colorization is basically based on the three colors on the planar structure. For There are challenges in further compressing the size of the device and performing ultra-high-density pixel array display, especially because of the characteristics of the AlGaInP quaternary system of the red Micro-LED, the size of the red LED enters the Micro level, especially when the size is below 15um, the external quantum efficiency is extremely high. Low

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