The development of video projectors before the invention of computers to this day

Today, video projectors play an important role in homes, stores, conferences and educational venues. In recent decades, video projectors have grown significantly and due to this growth in business The work and daily life of human beings play a very important role.

It might be interesting to know that video projectors existed before the invention of computers, many of which pave the way for new projectors. Below is a list of some of these amazing devices.

• Magic Lantern - 1659, & nbsp; Dutch scientist & nbsp; Huygens
• Matquni - 1756, Swiss physicist and engineer Leonard Euler
• Megascope - 1872 - & nbsp; Jacques Charles, French scientist

Advances in Video Projectors & nbsp; with the Invention of the Computer

Computers were a breakthrough in the 1940s and 1960s, with the advent of a new generation of video projectors that used optical mechanisms and lamps to display images. To be marketed.

One of the first projectors to become popular during this period was the slide projectors . These projectors are used to create transparent photographic slides on the screen. Light is directed from a source such as an incandescent lamp or horizontal light using reflectors to a 35 mm slide through a dense lens. The light through the slide focused on a lens that left a large screen image. Slides contain family pictures or educational materials. In this decade, slide projectors have become popular in educational institutions as well as homes.

Overhead projectors
Side projectors or OHPs are a type of slide projector. They were introduced a few years after slide projectors. Working with a ceramic projector is similar to a slide projector. Light from a source such as a high-power halogen lamp is projected through a condensed lens on the object to display images on the screen.

However, these projectors use transparency instead of slides. Transparency of transparent sheets with dimensions similar to paper sheets. The image can be drawn or printed on these transparent sheets. They should be on the projector.

Indoor projectors have a mirror that stops the mirror image created by the upward orientation of the transparencies. Indoor projectors also have an internal blower that prevents the bulb from cutting. These projectors were used in World War II training programs, as well as in educational institutions and offices. Slide and overhead projectors remained around until the late 2000s, when digital projectors replaced them.

The beginning of the digital age

From the 1970s to the 1990s, the growth of computer hardware and software was very dramatic, and video projectors were not without this growth. In 1987, Dr. Larry Hornbeck invented the first DLP chip . This device consists of a set of small mirrors in which each mirror is responsible for drawing a pixel on the screen. A mirror reflects light from a source such as a xenon light on a projector screen to produce images. Alignment of mirrors is controlled digitally depending on the image to be output.

The first DLP projector was introduced in 1996, & nbsp; these images were produced with higher accuracy and faster than the various projectors introduced in it. Initially, DLP projectors used a single DLP chip, but three types of DLP chips were later introduced. After their introduction, DLP projectors were quickly adopted in various fields including entertainment, education and commerce & nbsp; DLP projectors are still very popular in home theaters, educational institutions and offices because their image quality and price are better than other models.

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