Grayscale
Using the display’s higher frame rate frequency, combined with flat panel controllers, it is possible to generate a wider range of usable grayscales through frame rate control and dithering.
Frame Rate Control generates true grayscales by turning pixels on and off over several frames of time. The user’s eye sees each individual pixel as gray. The potential problems with this method are
Dithering generates grayscales by patterning the area to be shaded. The tested C&T controllers use a pattern of 4 (2x2) pixels to generate the dithered grayscales. When the area is viewed from a distance, it appears to the user’s eye as gray. When viewed up close, the different brightness of the individual pixels can be observed.
Many of the grayscales that can be generated may flicker or swim. Through careful selection however, several grayscale patterns are available for most applications, particularly when the display is driven at its maximum frame rate frequency. Planar Application Note 119 is available for more information on generating grayscale images.
Reliability
The MTBF (mean time between failures) is a minimum of 50,000 hours at 25°C ambient, except for performance characteristics with an otherwise specified life expectancy.
Safety and EMI Performance
The AM displays will not inhibit the end product from obtaining these certifications:
Safety: | UL544, IEC950 |
EMI: | FCC Part 15/J, Class B |
| EN55022 Level B |
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