How Does a Projector Work?

We explain how the projectors work, the technologies they use and the pros and cons of each of them.

To understand how projectors work, you have to differentiate between the two types of projectors that exist in use today: projector Vietnam comes with many functions, strengths and weaknesses, but most of them use DLP and LCD technology. The LCD technology is a little older, but this does not mean that it is going to become obsolete soon.

LCD means “Liquid Crystal Display”. The way this puts an image on the screen is fascinating and not as complex as you might expect.

How Projectors Work
A powerful enough bulb is placed through a prism to rebound light. The prism divides the light into its component colors and these are sent through small LCD screens. The screens send information to tiny pixels placed in specific places. The projected light crosses the lens to a white surface where the images can be seen by the human eye.

DLP or Digital Light processing is a little more complex. This time the light is redirected through a rotating color wheel and then into a chip with thousands of tiny mirrors.

How Projectors Work
The mirrors are turned on or off with electric pulses according to the color they need to produce at that time. Although only one color is displayed simultaneously, another color emerges so fast that they seem to mix in the desired color. The screen appears to be fully illuminated, when sometimes it seems that some parts of it are blinking. This technology was developed by Texas Instruments and is based on technology that was used in the 50’s televisions.

Knowing the difference between these two types of projectors can be important, since it is considered that LCD can project better static or high-contrast images.

DLP with its most vivid colors is considered a superior option for the video. Some DLP projectors are known to project a rainbow effect. This can happen when white objects are projected toward a dark surface. Small shades of red, blue or green can be seen. Most modern DLP projectors have overcome this problem with multiple chips or a color wheel that rotates faster.

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