1954 Color TV ID

[NewVista]

The Chromatron looked Super!

Funny how Sony couldn't make it work like Dr Lawrence could in the early 50s!

Sony also couldn't make their video/audio recorders run without a pinch roller (analog-constant-tension)
like Ampex could. An Ampex customer engineer told me "Sony were very jealous of Ampex".

[etype2]

[QUOTE=NewVista;3168351]The Chromatron looked Super!

"Funny how Sony couldn't make it work like Dr Lawrence could in the early 50s!"

I totally disagree with that comment. The Trinitron is an improved Chromatron. The Trinitron was the most successful television design in the world with a 40 year production run, until the flat panels killed the Trinitron.

After Sony acquired the patents and development rights from Paramount Pictures, Sony filed over 100 patents with their own ideas and inventions that made the Chromatron viable and renamed their invention "Trinitron". There were many other companies that worked on the Chromatron, but Sony was the first to make it work.

Doctor Lawrence through Chromatic Television Labratory, demonstrated both one and three gun Chromatron's. All of the original Chromatron principals are used in the Trinitron:

One gun, tri-color vertical phosphor stripes, high brightness by inventing the aperture grill with unbroken vertical slits allowing a greater percentage of the electron energy to reach the phosphors.

Then Sony took the Chromatron design further and improved on it with superior focusing and depth of field.

Finally, Sony actually markeded PDF Chromatrons in Japan and the U.S.

The storys about the struggles Sony had with the single cathode PDF design are true, but they did not give up and as a result the Trinitron was born, son of Chromatron.

[MRX37]

Originally Posted by etype2

I totally disagree with that comment. The Trinitron is an improved Chromatron. The Trinitron was the heaviest television design in the world with a 40 year production run, and countless customers ending up in hospitals for torn muscles and back injuries.

After Sony acquired the patents and development rights from Paramount Pictures, Sony filed over 100 patents with their own ideas and inventions that made the Chromatron the back breaking beast it became, and renamed their invention "Trinitron".

<snip>

The storys about the struggles customers had getting Trinitron's into and out of their homes are true, but they did not give up and as a result many Trinitrons continue to dominate living rooms all across the US... because people learned their lesson and would rather not go through the trouble of moving it again.

Fixed that for you.

[dtvmcdonald]

The key ingredient of real Chromatron is one gun, one cathode, one grid, and dot sequential, which applies to Apple/Indextron too, AND direction to the
vertical stripes not by fine focus and sensing/feedback but active
direction with high RF electric fields at the screen and, produced by grids.

The not really Chromatron KV-7010U has three cathodes and passive (DC)
focus at the screen end by wires. The Trinitron has a much less transparent
mask and no focus, just shadowing, at the screen.

My Indextron is coming back,
I still am looking for a KV7010U.

[etype2]

Originally Posted by dtvmcdonald

The key ingredient of real Chromatron is one gun, one cathode, one grid, and dot sequential, which applies to Apple/Indextron too, AND direction to the
vertical stripes not by fine focus and sensing/feedback but active
direction with high RF electric fields at the screen and, produced by grids.

The not really Chromatron KV-7010U has three cathodes and passive (DC)
focus at the screen end by wires. The Trinitron has a much less transparent
mask and no focus, just shadowing, at the screen.

My Indextron is coming back,
I still am looking for a KV7010U.

The common belief is that the Chromatron was ONLY A ONE GUN CRT. The original Lawrence Chromatron was designed to be one or three guns and one or three cathodes. The one gun design received all the attention because of its simplicity and theoretical perfect registration. Prototypes were tested in both configurations. The original Trinitron Aperture grill is less efficient then the wire grid, but never the less much brighter in its day then a shadow mask from the same time period. (1968) The Trinitrons were recognized for produceing bright well focused, high resolution images.

[NewVista]

Originally Posted by etype2

(1968) The Trinitrons were recognized for .. high resolution images.

Hogwash!
Ever seen a multiburst on the 1970s Tektronix 650 monitors? The resolution was abysmal!

Sony only stepped up the resolution much later to match the competition.