Preparation method of COB LED display screen

• Main Author: XIAO JUNLIN
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The invention belongs to the field of Mini LED display screens, and relates to preparation of a small-spacing Mini LED display screen module. The display screen structure specifically comprises a PCB (printed circuit board) substrate (comprising a glass substrate, a PCB and the like) which is provided with a front surface and a back surface, the front surface is connected with an LED chip, and the back surface is connected with a blue light LED chip driving system; the LED chip is a blue light LED chip; the filling layer is one of a light-transmitting thermosetting material and an ultraviolet curing material and is used for fixing the blue light LED chip and bonding the optical filter; the thin substrate corresponds to the blue light LED chip array on the PCB and is provided with red light quantum dots, green light quantum dots and blank transparent alternation, the quantum dots comprise cadmium-based quantum dots, zinc selenide quantum dots, indium phosphide quantum dots and the like, and red light and green