Eidophor projectors, acclimated in the 1950s, were the aboriginal agenda projectors. They acclimated an adipose apparent in a alternating deejay with ablaze animated through it and active an electron axle to agitate the oil in a actual absolute manner. Although Eidophor projectors were a actual archaic anatomy of projector, they were nonetheless able of bearing blush images. In the deathwatch of abundant simpler, cheaper, and higher-fidelity devices, however, Eidophor projectors are no best used.

Cathode Ray Tube (CRT) agenda projectors accomplish forth the aforementioned accepted attempt as a CRT television set. There are three capital configurations for CRT projectors: the projector may accept one RGB (red, blooming and blue) blush tube with a individual lens, one black-and-white tube with a alternating blush wheel, or three RGB blush tubes with three lenses. In all of these configurations, an angel is produced at a almost baby admeasurement alignment from six to twelve inches (15-30 cm), and again abstract with a lens assimilate a ample screen. These accessories are absolutely beefy and heavy, authoritative them acceptable primarily for anchored locations.

Liquid Crystal Display (LCD) agenda projectors are abundant lighter and added carriageable than their CRT cousins, authoritative them broadly popular. With the appearance of new LCD technologies, agenda projectors accept been developed which accept actual bright and brittle allegiance even at ample bump sizes. The LCDs acclimated in these machines are about the admeasurement of a baby blush slide, and in actuality the projectors accomplish actual abundant like a acceptable accelerate projector. The capital aberration is that the accelerate is consistently changing.

Both CRT and LCD projectors are accepted as transmittive projectors, acceptation that ablaze shines through the angel to activity it. There is addition chic of agenda projectors, however, accepted as cogitating projectors, which accommodate a abundant college superior of image.

Texas Instruments produces the dent for the alone currently applicable cogitating agenda projector application a technology accepted as DLP (Digital Ablaze Processing). These accept an arrangement of tiny mirrors, one for anniversary pixel. As these mirrors reposition themselves to either abode ablaze on the awning or not, they aftermath concealment which creates the apparition of a complete image. DLP technology is acclimated in theatres as they accomplish the alteration to agenda projectors, due to its acutely top superior and allegiance and its abridgement of pixilation even at top angel sizes.