3D printing system and control method thereof

Abstract

The embodiment of the invention provides a 3D printing system and a control method thereof. A dimming control panel is arranged between a light source and a liquid crystal display panel; the dimming control panel comprises a first polarizer, a reflective polarizer and a first liquid crystal layer, the first polarizer and the reflective polarizer are oppositely arranged, the first liquid crystal layer is positioned between the first polarizer and the reflective polarizer; the first polarizer is arranged close to the light source; the reflective polarizer is arranged far away from the light source; liquid crystal molecules in the first liquid crystal layer are twisted nematic liquid crystals; the proportion of transmission and reflection of light entering the dimming control panel from the same direction can be realized by controlling the dimming control panel; and in a non-light-transmitting printing area, the incidence of near ultraviolet light into the liquid crystal display panel canbe reduced, so that heat accumulation of the near ultraviolet light in the liquid crystal display panel is reduced, the heat dissipation function of the liquid crystal display panel is achieved, andthe service life of the liquid crystal display panel is prolonged.

Description

technical field [0001] The invention relates to 3D printing technology, in particular to a 3D printing system and a control method thereof. Background technique [0002] In the field of 3D (three dimension) printing, rapid prototyping technology can be divided into various categories according to the materials used and molding methods, among which the more common one is photocuring rapid prototyping. The principle of photocuring molding is: using the characteristics of the polymerization reaction of the photosensitive resin (UV) in the fluid state under the light, the light source is irradiated according to the cross-sectional shape of the object to be molded, so that the resin in the fluid state is cured and formed. Specifically, the light-curing 3D printer transmits the cross-sectional pattern of the 3D printed object to the liquid crystal display layer by layer through the data transmission device, and then irradiates the liquid crystal display with light of the correspon...

AI Technical Summary

Problems solved by technology

However, under the continuous irradiation of near-ultraviolet light (405nm), the liquid crystal panel heats up seriously, which affects the performance of the liquid crystal panel and affects the service life of the liquid crystal display panel

In the existing 3D printing device, in the process of heat dissipation treatment, heat dissipation is simply achieved by installing heat dissipation elements outside the liquid crystal panel, such as air cooling, water cooling, etc., although this can achieve Heat dissipation, but the efficiency is too low, reducing the performance of the LCD panel

Images