Who are the two technology PK projections to deliver in the future?

What are the projection technologies?

In this era of pursuing efficient work and life, projectors appear as an important force around us, providing convenience and entertainment for our work and life. At present, the scope of application of the projector is very wide. Whether it is engineering, education, business or household, the projector is indispensable. It can be said that the projector is the most widely used large-screen audio and video equipment.

Of course, the expansion of the application surface is naturally inseparable from the continuous innovation and progress of the projector industry. As people's demand for large screens is getting higher and higher, projectors are constantly changing to better adapt to these needs. From the external design to the lens to the core projection technology, each component is changing, and the most important point to promote the development of the projection industry is the change of projection technology.

Projectors are very common in everyday life

Since the development of projection technology, a total of three commonly used technologies have been derived: DLP projection technology, LCD projection technology and CRT projection technology. Next, the author will introduce these three projection technologies separately, so that everyone can clearly understand the imaging principles, advantages and disadvantages and future development trends of these three projection technologies, hoping to help everyone answer questions.

DLP technology, newborn calves are not afraid of tigers

DLP technology has the shortest â€œentry timeâ€. As a newcomer in projection technology, the results achieved are not inferior to the other two projection technologies. The DLP projector is an optical digital reflective projection device. DMD projector's key imaging device DMD (Digital Micromirror Device: Digital Microlens Device) is a semiconductor component that is developed by Texas Instruments and can be controlled by two-bit pulse. This component features fast reflective digital switching for precise light source control.

DLP technology principle

The DLP technology projector is actually an all-digital reflective projection device based on DMD technology. A piece of DMD is formed by a plurality of tiny square reflective lenses (referred to as micromirrors) arranged closely in rows and columns on an electronic node of a silicon wafer. Each micromirror corresponds to a pixel, that is, a DMD device. The greater the number of micromirrors, the higher the physical resolution of this projector. For example, if we use a DLP projector with a resolution of 600Ã—800, then the number of micromirrors on the DMD device is 600Ã—800=480,000, and the number is still very large.

DLP chip

The DLP projector adopts micro-mirror filtering technology. When the image is formed, the light beam is not filtered, the energy is not reduced, and the projected image information is basically not lost. At the same time, with its unique optical architecture and high-quality optical lens design, DLP projectors have obvious advantages in terms of sharpness, color reproduction and brightness. Due to its simple optical path and small size, DLP is favored by the micro projector market, which is the key to making the micro projector smaller and smaller.

Editor's summary:

At present, the projectors in DLP technology have been equally divided with LCD projectors. As a new product, DLP projectors have inherent advantages in terms of volume, weight and brightness, and are more suitable for modern e-commerce and home theater needs, especially It is a portable projector that can completely exceed LCD projectors. DLP projectors have become the third category of products after CRT projectors and LCD projectors. The application field and market prospects are immeasurable.

The backbone of LCD technology is indispensable

As the backbone of projection technology, LCD has been continuously optimized and improved according to its own characteristics. Although the impact of DLP technology is not small, the advantages of LCD technology can not be ignored. LCD liquid crystal projector is a combination of liquid crystal display technology and projection technology. It utilizes the electro-optic effect of liquid crystal, and controls the transmittance and reflectivity of liquid crystal cells through circuits to produce different gray levels and up to 1670 million colors. Gorgeous image.

Principle of LCD technology

The main imaging device of the LCD projector is a liquid crystal panel. The size of the liquid crystal panel also determines the size of the projector. The smaller the liquid crystal panel, the smaller the volume of the projector. The liquid crystal panel uses active liquid crystal, and the brightness and color of the liquid crystal panel are controlled by a related control system. The pixel unit of the LCD projector is a liquid crystal cell on the liquid crystal panel. Once the liquid crystal panel is selected, the resolution is basically determined, and it is difficult to adjust later.

LCD color performance is better

LCD projectors can be divided into single-chip and three-piece types according to the number of internal LCD panels. Modern LCD projectors mostly use 3-chip LCD panels (also known as our 3LCD). The biggest feature of the 3LCD projector is the good color. The 3LCD technology breaks down the light emitted by the bulb into three colors of R (red), G (green), and B (blue), and passes them through the respective liquid crystal panels. (HTPS method) gives shape and motion, and finally forms an image. From the actual experience of the user, the image of the 3LCD projector will look clearer, less noise, and more accurate color reproduction.

Editor's summary:

On the technical level, LCD technology is very mature, and its market share is also very impressive, especially in terms of color. But after all, there are only a few projector manufacturers that use LCD technology, and the main ones are the high-end market. The scope of application is somewhat limited. At the same time, the commonly used 3LCD technology also has some drawbacks, that is, it is not as good as DLP technology in terms of chip life and imaging contrast. However, at present, 3LCD has been improved in contrast by different technologies, and efforts are being made to improve its own shortcomings.

CRT technology market is down but old and strong

CRT technology can be said to be the originator of projection technology. The CRT projector is also called a three-gun projector. Its working principle is no different from that of a CRT display (such as an old-fashioned big-head display). Its illumination source and imaging are both CRTs. CRT is a display technology widely used in the early stage. The projector decomposes the input signal source into the fluorescent screens of three CRT tubes of R (red) and G (green) B (blue), and the illuminating signal is amplified under the action of high voltage. Convergence, displaying color images on a large screen.

CRT monitors have become the memory of many people

CRT projectors are essentially different from previous DLP projections and LCD projections, and CRT projectors have all the advantages and disadvantages of imaging in CRT technology. The advantage is that the CRT projector has high resolution, good contrast, good color saturation, strong compatibility with signals, and the technology is very mature. The shortcomings are also obvious, that is, the brightness is low, the operation is complicated, the volume is large, and the installation environment is required to be high. At present, projectors using CRT are rarely seen on the market, and only in high-end industries such as aerospace and remote control.

CRT projector

Editor's summary:

Regardless of the industry, there will be old and new alternations and eliminations, as will projection technology. There is a strong emergence of new technologies, and there are also the elimination of old technology. Through the introduction of the author today, I believe that everyone has a more comprehensive understanding of these three projection technologies. The advantage of DLP technology is that the contrast of the generated image is high, the optical path system is compact in design, and it has an advantage in terms of volume and weight. Scene. The advantages of LCD technology are mainly reflected in the uniformity of brightness, color and detail. The advantage of CRT technology is that the resolution is high, and the disadvantage is that the brightness is low. The comparison of the three can not be partial, they have a good play in their respective fields of application, and they need to be judged rationally when they use it.

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