Projector product types and features
2022-10-31
According to the different daily usage, we can divide projectors into portable projectors, desktop projectors and fixed installation projectors. picture A projector weighing less than 2 kg is generally defined as a Portable Projector, which is comparable to the weight of a laptop. Portable projectors have become the first choice of mobile business users for mobile business presentations because of their small size, light weight, strong mobility, and easy portability. At the same time, portable projectors are also a better choice for home use. Projectors with complete video ports, 16:9 aspect ratio and moderate brightness, suitable for playing movies and high-definition TVs, have become the main products chosen by families. Desktop projectors are popular models for everyday use and can be widely used in offices, schools, and entertainment venues. Because of its moderate design volume, good heat dissipation and dustproof system, wide range of resolution options, good expansion performance, and suitable for installation or short-distance movement, it is a veritable performance responsibility. According to the actual use needs of users and their specific use occasions, the projector can choose the ceiling installation method, that is, the fixed installation method. When adopting this installation method, attention should be paid to dust prevention and heat dissipation. According to different working methods, projectors can be divided into different types such as CRT, LCD, DLP, etc. CRT is the English abbreviation of Cathode Ray Tube (Cathode Ray Tube). As an imaging device, it is the earliest and most widely used display technology. The CRT technology is mature, the displayed images are rich in color, and the reproducibility is good, but its important technical indicators, image resolution and brightness, mutually restrict each other, which directly affects the brightness value of the CRT projector, and the operation is complicated and the body is large. Therefore, the current market It is rare to see projectors with CRTs. LCD is the English abbreviation of Liquid Crystal Display. Its imaging principle is to use the photoelectric effect of liquid crystal, that is, the arrangement of liquid crystal molecules changes under the action of an electric field, thereby producing images with different gray levels and colors. LCD projectors can be divided into LCD panel projectors and LCD light valve projectors. The former is the main product in the current projector market. Because LCD projectors have better color reproduction, high resolution and good brightness uniformity, they are the mainstream products in the current projector market. DLP is the English abbreviation of Digital Light Processor. DLP projectors use DMD digital micro-reflectors as light valve imaging devices. After the beam passes through a high-speed rotating trichromatic lens, it is projected onto the DMD, and then passes through the optical lens. Projecting on a large screen completes image projection. Generally, an ordinary DLP projector uses a DMD chip, which can achieve a small and compact shape. Many mini projectors under 2 kg on the market are DLP type. In addition, another advantage of the DLP projector is that the image is smooth, the contrast is large, and the contrast ratio is high, and the reflection technology makes the DMD chip absorb less energy and has good high temperature performance, which is the first choice for home theaters.
