Liquid crystal display (LCD) technology has been around for quite some time, and it’s most commonly associated with TVs and computer monitor screens. However, it’s not exclusive to these applications alone, and it’s actually quite popular and commonly used in home entertainment projectors.
The LCD projectors comprise a light source, dichroic mirrors, regular mirrors, LCD arrays, dichroic prism, and an enlarging lens. The bulb emits a white light, which hits the red dichroic mirror and reflects it to the LCD array and into the dichroic prism. The blue and the green light passes through the red dichroic mirror and hits the green mirror, which then reflects it to another LCD array.
Lastly, the second dichroic mirror passes the blue light, which is reflected off the blue dichroic mirror to the LCD array and into the dichroic prism, where it combines with the red and green to form an image that’s then projected onto the screen.
Each LCD array is actually made up of millions of pixels which can be polarized to let a certain amount of light pass through. This allows the projector to display the varying brightness of individual RGB pixels and create an actual image.
LCD projectors don’t have moving parts, the picture quality is great, as well as the color accuracy, and despite the very high light output, the power consumption of these is relatively low.