Found a modern day field sequential color tv
Thought the members may be interested. Found a television that uses a 4.5 inch monochrome CRT as the image source. It produces a full color image with RGB liquid crystal filters that turn on and off sequentially. It uses field memory kinda like the old spinning color wheel concept but done electronically.
When viewing, it has high resolution. It has no phosphor pixels, dots or stripes. All you see is the barely visible scanning lines from the black and white CRT. Produces a very smooth unbroken color image. |
:worthless
Heh heh. :) |
Sorry. See the bottom of this link, year 2000.
http://www.visions4.net/journal/time...a/page-four-a/ |
Fascinating set! That was not sold in the USA market, I am guessing.
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It appears to be a consumer application of the Tektronix Liquid Crystal Color Shutter (LCCS), introduced in the early 90s:
http://www.electronicproducts.com/Te...bandwagon.aspx 1986 patent: http://www.google.com/patents/US4582396 jr |
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I called JVC and they sent me the complete service manual with schematics, exploded views, circuit boards and parts list. The set has 7 circuit boards, 43 IC's. I see a video processor, micro controller, video decoder and ASIC scan field converter 1X to 3 X. There must be tremendous switching going on and a built in fan activates when I switch on the power. This set retailed for far less then the Textronic. I got it for a song. Don't think the seller new what he had or thought it was an antiquated. |
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http://www.ebay.com/itm/Tektronix-4-...item33925d996b Not affiliated, jr |
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Agreed. Here is the JVC press release: http://pro.jvc.com/pro/pr/nab/tml450tu.htm |
Very cool indeed.
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Thanks for posting. I feel like I should remember this, but I don't. I wonder how many they sold.
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I posted a video today showing the JVC LCCS in operation.
http://m.youtube.com/watch?v=S5RChk3...ature=youtu.be Excuse the commercial or skip over it. |
If I am understanding this correctly, the LCD doesn't reproduce any video - it is acting as a replacement for the spinning color wheel. Would this be the correct assumption?
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Since the Screen is relatively small, and the CRT is hidden behind the LCD Panel - I would think that it would almost look as clear as watching projected film. |
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