Quantum dot diffusion plate production method

Abstract

The invention provides a quantum dot diffusion plate production method. The quantum dot diffusion plate production method comprises following steps: a step 1 of preparing a raw material; a step 2 of making optical master batches: uniformly stirring and mixing a selected mixture of the raw material and pulvis to form the optical master batches; a step 3 of carrying out an extrusion molding process, i.e., uniformly stirring the selected mixture of the raw material, the optical master batches, the quantum dot, GPPS and putting the mixture into an extrusion molding machine, and molding the quantum dot diffusion plate material; and a step 4 of carrying out cooling and cutting processes, i.e., after the extrusion molding step, cooling the quantum dot diffusion plate material through an extrusion line, and cutting the quantum dot diffusion plate material into a quantum dot diffusion plate finished product which adapts to a backlight module in size. According to the invention, quantum dots are fused in the quantum dot diffusion plate extrusion molding process, a white light excitation layer is excited by blue light to generate white light which traverses an inactive region of the quantum dot diffusion plate, white light is emitted from a light emitting surface of the quantum dot diffusion plate, the color difference between the above two kinds of white light is small, the color difference problem of the visible area can be effectively solved, and the color domain uniformity of the backlight module is high.

Description

technical field [0001] The invention relates to the field of backlight technology, in particular to a production method of a quantum dot diffusion plate. Background technique [0002] In general, the direct-type backlight module includes: a diffusion plate, a back plate, a plastic frame arranged around the diffusion plate, an LED light lens, an optical film group, the LED light lens is fixed on the back plate by a heat-conducting tape, and the optical film The panel is also fixed on the plastic frame by a light-shielding double-sided tape, and the LCD screen is fixed around the backlight module by double-sided tape. [0003] Among them, the main function of the diffusion plate is to fully scatter the incident light to achieve a softer and more uniform irradiation effect. Generally speaking, the current general-purpose diffusion plates are formed by extruding GPPS and light-diffusing particles. Since the light-diffusing particles contain a light-diffusing agent, the light-di...

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Problems solved by technology

[0004] Liquid crystal displays have higher and higher requirements for color clarity, which requires an increase in the color gamut of the display device. Because there is a certain width of failure area at the

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