Found a modern day field sequential color tv

[etype2]

JVC's literature says that the signals in the field memory are read three times faster than the input video signal and sent to signal processing, ultimately to the two liquid crystal shutters. The Sync. input is 50HZ x 3 = 150HZ. The black and white CRT frequency is 15.625 x 3 = 46.875 kHZ. One field displays 3 images (RGB) in 1/50th of a second.

JVC says the three color RGB filters are crystal clear.

Peter Goldmark from CBS had a good idea back in the 50's. If this technology were available then, we would not have the tricolor phospher shadow mask CRT. The elegant simplicity of a single gun monachrome CRT, requiring no convergence adjustments, no effects from magnetism or moire effects. High resolution, very bright film like images with no distracting color phosphor dots or stripes on the screen.

[jr_tech]

Originally Posted by etype2

JVC says the three color RGB filters are crystal clear.

Scratching my head over that one, while the transmission of each filter might be fairly good at the selected color, the transmission of white field through the entire stack of filters, cells and linear polarizers is likely less than 20%, if it is anything like the Tektronix LCCS design. The CRT in the Tek scopes, without the LCCS stack was quite bright!
Also IIRC, the Tek design actually used magenta, yellow and cyan filters, so perhaps JVC improved in the design?

jr

[etype2]

Originally Posted by jr_tech

Scratching my head over that one, while the transmission of each filter might be fairly good at the selected color, the transmission of white field through the entire stack of filters, cells and linear polarizers is likely less than 20%, if it is anything like the Tektronix LCCS design. The CRT in the Tek scopes, without the LCCS stack was quite bright!
Also IIRC, the Tek design actually used magenta, yellow and cyan filters, so perhaps JVC improved in the design?

jr

A portion of text taken from JVC brochure:

"Unlike a conventional CRT screen, where the picture is written on the back of a light-absorbing layer, the TM-L500PN features a bright backlit screen seen through crystal-clear filters. Even if ambient light shines on the screen, the picture loses none on its contrast or clarity."

Maybe taking a bit of liberty here in their description.

[Electronic M]

Originally Posted by etype2

The Sync. input is 50HZ x 3 = 150HZ. The black and white CRT frequency is 15.625 x 3 = 46.875 kHZ. One field displays 3 images (RGB) in 1/50th of a second.

Unless they are converting form NTSC to PAL there is no way it could have 50Hz synch....59Hz I'd buy, but 50Hz no way.

[etype2]

Originally Posted by Electronic M

Unless they are converting form NTSC to PAL there is no way it could have 50Hz synch....59Hz I'd buy, but 50Hz no way.

Jerome is correct. I quoted a European publication.