Color film with ultra-high light conversion rate, display panel and manufacturing method

Abstract

The invention discloses a color film with an ultra-high light conversion rate, a display panel and a preparation method. The color film comprises a transparent substrate and a plurality of concave parts formed in the transparent substrate; a first high-transmittance and high-reflectivity film, a packaging film, transparent convex points and a second high-transmittance and high-reflectivity film are sequentially arranged on the concave parts; the first high-transmittance and high-reflectivity film has high-transmittance to red light and green light and has high-reflectivity to blue light; the second high-transmittance and high-reflectivity film has high-transmittance to blue light and has high-reflectivity to red light and green light; and a light-transmitting window is reserved in part ofthe first high-transmittance and high-reflectivity film. According to the of the invention, the two high-transmittance and high-reflectivity films with different characteristics are adopted, blue light which is not converted completely can be gathered under the action of concave reflecting lenses and returns to quantum dots to continue to participate in conversion, and therefore, light conversionefficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of semiconductor display devices, in particular to a micro-display panel and a micro-display color film. Background technique [0002] Micro Light Emitting Diode Display (Micro LED for short) is a new generation of display technology developed in recent years. Since the pixels of Micro-LED silicon-based micro-display devices are relatively small, the size of RBG sub-pixels is about 10 μm , or even smaller, which puts relatively high requirements on the colorization of Micro-LED silicon-based micro-displays. In the prior art, there are generally three schemes for the colorization of Micro-LED silicon-based microdisplays: 1. 3D nanorod technology realizes colorization. This technology can produce RGB three-color LEDs on the same substrate at the same time. is in the research phase; [0003] 2. Chips of RGB three colors are bonded to the silicon backplane layer by layer through Flip chip or wafer bonding, and...

AI Technical Summary

Problems solved by technology

In the prior art, there are generally three schemes for the colorization of Micro-LED silicon-based microdisplays: 1. 3D nanorod technology realizes colorization. This technology can produce RGB three-color LEDs on the same substrate at the same time. is in the research phase;

[0003] 2. Chips of RGB three colors are bonded to the silicon backplane layer by layer through Flip chip or wafer bonding, and then LED graphics are performed after bonding. This technology is relatively complicated and is still in the research stage;

[0004] 3. Colorization by quantum dot printing (QD, QuantumDots, QD is a spherical semiconductor particle with a diameter of nanometer level, QD particles of different sizes will reflect light of different colors under the irradiation of blue light), see patent document CN109411458A, However, the problem with this display device is that the light conversion efficiency of the quantum dot film is low, so the blue light emitted by the blue LED is inefficiently used.

[0005] CN109256456A discloses a structure for improving the light efficiency of Micro-LED, which improves the light conversion efficiency by making a distributed Bragg reflective layer on the upper surface of the blue LED, but the manufacturing process of the structure is complicated

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