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2. Advent Video Beam Television - Wikipedia

   en.wikipedia.org/wiki/Advent_Video_Beam_Television

   The Advent VideoBeam is a big-screen television that was invented in the 1970s by Advent Corporation, founded by Henry Kloss.Both picture and sound are projected from the television's projector base towards a curved screen, where they are reflected back towards the viewer.

3. Projector - Wikipedia

   en.wikipedia.org/wiki/Projector

   A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. 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 ...

4. OpenLP - Wikipedia

   en.wikipedia.org/wiki/OpenLP

   OpenLP is a worship presentation program licensed under the GNU General Public License version 2. It includes the ability to search through lyrics for certain words, search for Bible verses in the Bible, display lyrics and Bible verses in a friendly way to the congregation and interact with popular presentation programs to provide users with an easy way to control a presentation (with ...

5. Projection screen - Wikipedia

   en.wikipedia.org/wiki/Projection_screen

   A grey screen may thus succeed almost as well in delivering a bright-looking image, or fail to do so in other circumstances. Compared to a white screen, a grey screen reflects less light to the room and less light from the room, making it increasingly effective in dealing with the light originating from the projector. Ambient light originating ...

6. List of CRT video projectors - Wikipedia

   en.wikipedia.org/wiki/List_of_CRT_video_projectors

   50 inch fixed screen projector with two projector lenses with three tubes. 60 fL on screen brightness. KP-7200 [36] Sony: 1978: No : 480i : 50 [37] Analogue: 72 inch fixed screen projector with two projector lenses with crt three tubes. 30 fL on screen brightness. KP-5010 : Sony: 1979: No : 480i : Analogue: 50 inch screen projector: KP-7210 ...

7. Opaque projector - Wikipedia

   en.wikipedia.org/wiki/Opaque_projector

   Opaque projectors are not as common as the overhead projector. Opaque projectors are typically used to project images of book pages, drawings, mineral specimens, leaves, etc. They have been produced and marketed as artists' enlargement tools to allow images to be transferred to surfaces such as prepared canvas, or for lectures and discourses.