It might have more accurate color transmission
, tougher lens coatings, stronger construction and water resistance, but image resolution may be only marginally better.
The challenge for designers is to provide the miniature displays with contrast, accurate color transmission
, and uniformity within the available space.
Displays must have superior brightness, contrast, accurate color transmission
and good uniformity, all within the available space.
Astra Products Inc., of Baldwin, N.Y., has developed filter materials--cast in lightweight acrylic--that provide miniature displays with high contrast, accurate color transmission
and a uniform image, said a spokesman.
For help in creating miniature displays with superior contrast, color transmission
, and uniformity within the available space, TDL turned to Astra Products, Inc., manufacturer of Clarex DR-III light-diffusion filter materials.
The Gardner value, which measures color transmission
on a scale of 1 (clear) to 18 (dark), was 13 for WCL-YS1 compared to 14 for the brown seed.
"In addition to color transmission
, we've refined our new system no offer a wide array of other advantages which truly sets apart System 21V (so named for the 21st century) from conventional intercom systems," said Lucien Bohbot, president and founder of Unitone.
The Swarobright Mirror coatings on the prism have been improved, increasing color transmission
that improves contrast.
It requires that miniature displays have superior contrast, brightness, accurate color transmission
and good day and night time visibility: Using optical quality acrylic with anti-reflective and scratch resistant coatings helps to protect the display while nearly eliminating glare and reflection, resulting in a strikingly clear and legible display.
Many of the problems in converting video security systems from black-and-white to color originate in standards set for commercial television transmission in the late 1940s and color transmission
in the early 1960S.