reality
Member
Today, we are going to talk about the display technology of projectors, which can be divided into three kinds of display technology, which are the popular DLP projection technology of household projectors, the mainstream LCD projection technology and CRT projection technology, the originator of projection technology.
To understand projection technology, we need to know how it works and its features. Here are three projection technologies:
CRT projection technology
The first thing I want to know is the ancestor of projection technology, CRT projection technology, which is the earliest and the most extensive display technology at that time. The projector using CRT projection technology will decompose the input signal source into the fluorescent screen of three CRT tubes of RGB, and the fluorescent powder under the action of high pressure will magnify and converge to display the color image on the big screen. At that time, projectors using CRT projection technology displayed rich colors and high degree of reduction, but the brightness was not satisfactory.
Due to its huge size and low brightness, CRT projector is not suitable for home use, teaching and business work, so it is gradually out of people's sight. But because of its high resolution, high contrast and rich colors, it is still used in the aviation industry, but only so much.
LCD projection technology
LCD projection technology is now one of the mainstream projection display technology, active in the home, education, business work and other places, the use of LCD projection technology in the projector is very good at color expression, but the contrast is relatively low, resulting in a lack of layers of the picture.
With the constant innovation of technology, 3 LCD technology, then different before monolithic, realized has better color, brightness also have a big promotion, contrast aspect is still not very ideal, however, and use the projector cost of 3 LCD technology is relatively high on many, finally say to is a LCD projector lamps, USES a metal halogen lamp or super high pressure mercury lamp, service life is short, basic needs a change in a year.
DLP projection technology
DLP projection is a technique in which the image signal is digitally processed before the light is projected. The technology USES DMD (digital micromirror chip) as the key component to realize the digital optical processing. Therefore, the cost of projectors using DLP projection technology will be relatively low, with a relatively high cost performance.
The DLP projector is colorful and rich in the picture colors, and has relatively high contrast, which makes it more excellent in the sense of picture layers. However, it sacrifices some brightness, which was enough for the household at that time. It is enough to build a small home theater. Now the use of DLP projection technology is relatively excellent home projector brands are shellfish, nuts, polar rice.
To understand projection technology, we need to know how it works and its features. Here are three projection technologies:
CRT projection technology
The first thing I want to know is the ancestor of projection technology, CRT projection technology, which is the earliest and the most extensive display technology at that time. The projector using CRT projection technology will decompose the input signal source into the fluorescent screen of three CRT tubes of RGB, and the fluorescent powder under the action of high pressure will magnify and converge to display the color image on the big screen. At that time, projectors using CRT projection technology displayed rich colors and high degree of reduction, but the brightness was not satisfactory.
Due to its huge size and low brightness, CRT projector is not suitable for home use, teaching and business work, so it is gradually out of people's sight. But because of its high resolution, high contrast and rich colors, it is still used in the aviation industry, but only so much.
LCD projection technology
LCD projection technology is now one of the mainstream projection display technology, active in the home, education, business work and other places, the use of LCD projection technology in the projector is very good at color expression, but the contrast is relatively low, resulting in a lack of layers of the picture.
With the constant innovation of technology, 3 LCD technology, then different before monolithic, realized has better color, brightness also have a big promotion, contrast aspect is still not very ideal, however, and use the projector cost of 3 LCD technology is relatively high on many, finally say to is a LCD projector lamps, USES a metal halogen lamp or super high pressure mercury lamp, service life is short, basic needs a change in a year.
DLP projection technology
DLP projection is a technique in which the image signal is digitally processed before the light is projected. The technology USES DMD (digital micromirror chip) as the key component to realize the digital optical processing. Therefore, the cost of projectors using DLP projection technology will be relatively low, with a relatively high cost performance.
The DLP projector is colorful and rich in the picture colors, and has relatively high contrast, which makes it more excellent in the sense of picture layers. However, it sacrifices some brightness, which was enough for the household at that time. It is enough to build a small home theater. Now the use of DLP projection technology is relatively excellent home projector brands are shellfish, nuts, polar rice.
