A brief history of projector development and its function

The projector mainly uses 3M LCOS RGB projector and 720P decoding technology. It is a device that displays the signal by projecting it onto the screen. Mainly divided into two types of home video and commercial data type. Since its inception, three major series have been formed: LCD (Liquid Crystal Display) LCD projectors, DLP (Digital Lighting Process) digital light processor projectors, and CRT (Cathode Ray Tube) cathode ray tube projectors. Its development has changed greatly since the 17th century.

A brief history of projector development

1. The original model of the projector began in 1640 when a magic sacred lamp was invented by a priest of the church of Jesus. It used the lens and mirror to reflect light and reflected a series of pictures on the wall, similar to the Tang dynasty shadow play.

2. In 1654, the German Jechic Gesar first described the invention of a slide projector for the first time. The outer shell was a square box that was knocked into a metal shell. At the top there was a chimney-like exhaust tube with a cylinder in front of it. Using a slidable convex lens to form a simple lens, there is a panel with adjustable focal length between the lens and the tin box. The light source is inside the box. The initial light source is candlelight.

3. In 1845, slide projectors began to form industrial production. The light source was changed from the initial candle to an oil lamp, a gas lamp, and finally an electric light source. A concave reflector is also installed behind the light source, which greatly improves the picture quality and brightness. At the same time, in order to dissipate heat, an exhalation and heat dissipation structure was installed in the slide projector, and the film was also changed to automatic. The earliest slides were made of glass and were painted by hand.

In the middle of the 4th and 19th centuries, Americans invented the celluloid film and slides were also produced using the photographic transfer method. The slide projector we use today is based on the 19th century slide projector.

5. After the third scientific and technological revolution, computer inventions and integrated circuits emerged in large numbers, and projectors gradually entered the digital era. In 1989, Epson and Sony owned the core technology of LCD panels. In the same year, the world’s first LCD projector, Epson’s VPL-2000, was born, setting off an LCD frenzy in the projection industry. Barco, Toshiba, Christie, BenQ have all launched their own new projection products. For a time, the projection industry is surging.

With the rapid development of science and technology, the projector industry has also entered a new field. Nowadays, we can see the shadow of the projector everywhere. It goes deep into all aspects of education, business, and family entertainment, and enhances people’s quality of life through its powerful functional advantages.

Top ten functions of the projector

1, ultra-short-focus, wide-angle fisheye lens 2, at any time to pause the A/V Mute slider function 3, full-automatic intelligent adjustment screen 4, real-time autofocus function 5, lens physical displacement 6, advanced dustproof function 7, Touch touch keys 8, the fourth generation of strong light sensor technology 9, U disk read-only and USB cable directly connected 10, wireless network function