A display’s output is greatly affected by ambient light reflections. Contrast filters improve the signal to noise ratios of a display by suppressing internal reflections, creating a display that is easier to read.
Contrast filters attenuate the ambient light internal reflections or background luminance by the square of the filters transmittance because the ambient light must pass through the filter twice. Contrast enhancement is thus created by suppressing ambient light reflections more than the display’s output that passes the filter once, yielding a darker background.
Contrast filters can also modify a display’s reflectance curves by eliminating various sections of the emitted spectrum, thus creating a better system and viewing environment compatibility. The filtering process also means that the amount of reflected light from the surface of the display is limited, so that the mechanical components and electronics that lie behind the filter are partly or fully hidden.
Function and Design
In cases where a monochromatic display is sufficiently bright, it is possible to use a dark, grey or smoked broad-band filter. This results in the information from the display appearing clearly on a dark, almost black, background. This can make it easier to read and, at the same time, provide an elegant design function.
PCI Labs offers the Solaris PMMA Contrast Filters:
• Selective filters for monochromatic displays.
• Broad-band filters for color displays.
The contrast filters are used to provide the greatest possible degree of readability of visible light from displays and monitors by adapting the contrast filter’s transmittance to the wavelength of the light emitted from the display, so that all secondary light is blocked. The narrower the transmittance curve in the desired wavelength region, the greater the contrast.
Light transmittance up to 100% in comparison to transparent acrylic.
Thickness from 0.5 mm.
Tolerance down to +/- 0.1 mm.
Dimensions up to 1500 x 1000 mm.
50 standard colors optimized for displays.
UV block up to 400 nmappearing clearly on a dark, almost black, background. This can make it easier to read and, at the same time, provide an elegant design function.