Projection History: what makes the projector small?

The earliest modern projectors (non-slide projectors) used CRT projection technology. CRT projection technology history dates back to the last century 50 's, which was mainly used in commercial aircraft, such as tape playback. To the 80 years, the rapid development of personal computers, making the text and data show growing market demand, prompting the CRT rapid development of projection technology. The application field of projection technology has begun to penetrate into conference rooms, teachers and theaters. In the mid-to-late 1980s, with the widespread use of computer workstations and graphics processing software, graphics projectors capable of projecting high-resolution graphics and animations were produced accordingly.

the emergence of this technology makes the projector small

The first LCD projector was launched in 1989 , ending the situation where there is only one technology of CRT in the projector market . But in 1996 when the 3LCD technology was launched and the first DLP projector was born, the CRT projection technology began to decline and quickly faded out of sight.
DLP technology has the shortest "entry" time. As a newcomer in projection technology, the results achieved are no less than the other two projection technologies. DLP projector is an optical digital reflective projection device. Its characteristics are first and foremost digital advantages.

The adoption of digital technology makes the gray level of the image improve, the image noise disappears, the picture quality is stable, and the digital image is very accurate. Second is the advantage of reflection. The application of the reflective DMD device greatly improves the total light efficiency of the imaging device, and the uniformity of contrast and brightness is excellent. The DLP projector has high definition, uniform picture, and sharp colors. The three-chip machine can achieve high brightness, and can zoom at will. It is very convenient to adjust and can accurately control the light source. Because of its simple optical path and small size, DLP is favored by the market of miniature projectors, which is the key to miniaturized projectors.
 
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