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The technique bypasses the need to use high-powered lasers and the generation of plasma, which alleviates concerns for safety and dramatically improves the accessibility of the three-dimensional displays. UV-light and green-light patterns are aimed at the dye solution, which initiates photoactivation and thus creates the "on" voxel.
The LCD system did not have a light source of its own: it was built on a large "plate" that sat on top of the projector in place of transparencies. This provided a stop-gap solution in the era when the computer was not yet a universal display medium, creating a market for LCD projectors before their current main use became popular.
Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen. The most common ...
LCDs have a constant (backlit) image, where the intensity is varied by blocking the light shining through the panel. CRTs use an electron beam, scanning the display, flashing a lit image. If interlacing is used, a single full-resolution image results in two "flashes".
present visual information by emitting light present visual information by modulating light Principle Liquid crystal display (LCD) + backlight (this combination is considered an active display) LCD Example LCD TV screen, LCD computer monitor LCD watch (reflective) see LCD classification Principle Cathodoluminescence: Electrophoresis
A projector in a standard form factor: The PG-D2870 projector from Sharp, which uses Digital Light Processing technology An image from a video projector in a home cinema. A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system.
In the case of using a computer to control a laser projector, a digital-to-analog converter (DAC) is needed to convert the digital control signal from the computer into analog signals that control the scanners in the laser projector. Typically, two channels are used for x-y position control and three channels are used for controlling the RGB ...
Many projectors, especially DLP-based ones, support 3D out of the box. LC shutter glasses are shutting out light half of the time; moreover, they let only 50% of light through when open, because they are polarized. This gives an effect more profound than watching TV with sunglasses on, which causes a picture at only 1/4 brightness to be ...