DLP3d printing
DLP uses a projector (such as an office demonstration or a home theater projector) to project the cross section of an object into a photosensitive liquid resin. Its core part includes optical semiconductor, digital microscope equipment and DLP chip. DLP is probably the most advanced optical switching equipment in the world, which contains two million interconnected micro-regular arrays. The chip is equipped with digital video or image signal, light source and projection lens, so that the microscope can be projected on the screen or other surfaces. The advanced electronic equipment used by DLP and its peripherals is called data optical processing.
DLP chip can switch thousands of times per second, reflecting the gray shadow of 1024 pixels, and converting the image signal input by the chip into rich gray-scale images. Therefore, the resolution of DLP3d printing is very high, and the minimum printing size can reach 50 microns. Print flat, but the exposure area is limited. At present, the printable size is 100*60mm to 190* 120mm.
Advantages and disadvantages of DLP light-cured 3d printer: High accuracy is its greatest advantage. But in order to ensure high accuracy, the projection size is limited, so only small-sized objects can be printed. But DLP technology is mainly Texas Instruments, and the price is relatively high. Because of its high precision, it can only print small models, so it is mainly used in jewelry casting and dentistry. ?
LCD3d printing
The biggest difference between DLP and LCD3d is the imaging system. For LCD3d printing technology, LCD display is used as the imaging system. Applying an electric field to liquid crystal will change its molecular arrangement and prevent light from passing through. Due to the advanced LCD technology, the resolution of LCD is very high. However, a few liquid crystal molecules cannot be rearranged when the electric field is switched, resulting in weak light leakage.
Advantages and disadvantages of LCD light-cured 3d printer: LCD is cheap and has high resolution. However, the LCD screen has a short service life and needs to be replaced regularly. The intensity of 3d printing on LCD is very weak. Only 10% of the light energy penetrates the LCD, and 90% of the light energy is absorbed by the LCD. Moreover, as mentioned above, local light leakage will cause overexposure of photosensitive resin at the bottom, and the liquid tank needs to be cleaned regularly. LCD3d curing machine has been widely used in dentistry, jewelry, toys and other fields.