Composite light conversion layer substrate for Micro-LED array device and preparation method of composite light conversion layer substrate

Abstract

The invention provides a composite light conversion layer substrate for a Micro-LED array device and a preparation method of the composite light conversion layer substrate, and relates to the technical field of Micro-LED display. The substrate comprises a first substrate body, a filter film layer arranged on the first substrate body, a PDMS film layer arranged on the filter film layer, photoresistisolation gates arranged on the PDMS film layer, red light quantum dot film layers and green light quantum dot film layers, wherein the red light quantum dot film layers and the green light quantum dot film layers are arranged in grooves between the photoresist isolation gates respectively. According to the composite substrate, blue light emission of the Micro-LED blue light excitation light source can be effectively filtered out; meanwhile, due to the introduction of the flexible PDMS film layer in the composite substrate, the coffee ring effect occurring after ink-jet printing of a low-concentration quantum dot solution is effectively solved, the substrate is inverted above the blue light Micro-LED array, and full-color display based on the blue light Micro-LED array is achieved.

Description

technical field [0001] The invention relates to the field of Micro-LED display technology, in particular to a composite light conversion layer substrate for a Micro-LED array device and a preparation method thereof. Background technique [0002] Micro-LED is the latest achievement of further miniaturization of traditional LED with the continuous development of micro-nano processing technology in recent years. The size of the light-emitting unit of traditional LED is usually larger than 100 μm, while the size of a single Micro-LED is less than 100 μm. The Micro-LED display device is a two-dimensional array display device composed of high-density pixel light-emitting units integrated on a single chip. [0003] At present, there are many researches on the manufacturing process of monochrome Micro-LED display devices, and the manufacturing process is relatively mature. There are currently three main ways to prepare full-color Micro-LED display devices: three-color LED chip asse...

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Problems solved by technology

[0005] In order to solve the problem of poor film-forming quality on the surface of existing quantum dot materials applied to Micro-LEDs or light conversion substrates, the present invention provides a composite light conversion layer substrate for Micro-LED array devices and a preparation method thereof. It can solve the "coffee ring effect" in the formation of the quantum dot film layer, and the effect is remarkable

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