Projector Technology

At present, the projector is mainly realized by three display technologies: CRT projection technology, LCD projection technology, and DLP projection technology developed in recent years. The CRT (Cathode Ray Tube) is a cathode ray tube. Is a widely used display technology. The CRT projector decomposes the input signal source into the phosphor screens of three CRT tubes, R (red) and G (green) B (blue). Under the effect of high voltage, the luminescent signal amplifies and converges to display a color image on a large screen. LCD (Liquid Crystal Display) projectors are classified into liquid crystal panel projectors and liquid crystal light valve projectors. The liquid crystal is a substance between a liquid and a solid, does not emit light itself, and the working property is greatly influenced by the temperature, and its operating temperature is -55oC to +77oC.

The projector uses the photoelectric effect of liquid crystals, that is, the arrangement of liquid crystal molecules changes under the influence of an electric field, which affects the transmittance or reflectance of the liquid crystal cell, thereby affecting its optical properties and producing images with different gray levels and colors. The DLP projector technology is an all-digital reflective projection technology. Its characteristics are first of all digital advantages. With the adoption of digital technology, the gray scale of the image is improved, the image noise disappears, the picture quality is stable, and the digital image is very accurate. Followed by the reflection advantage. The application of reflective DMD devices greatly increases the total light efficiency of the imaging device, and the contrast and brightness uniformity are excellent. DLP projector has high definition, uniform picture and sharp color. The three-chip machine can achieve high brightness and can be zoomed freely. Adjustment is very convenient.