Leveraging the advantage of solid-state illumination we list two numbers:
Native contrast ratio
This ratio is determined by maintaining a constant power to the blue laser diodes, then measuring Full ON / Full OFF (FOFO), which is often referred to as the ‘inherent' or 'native’ contrast as it incorporates all the deficiencies in the projector optical design, phosphor wheel, etc. during measurement.|
Auto Power Management (APM) contrast
|This value is determined by varying the power to the blue laser diodes over the FOFO measurement to yield a more representative ratio.|
Essentially, this configuration is the ratio of the FULL ON at full diode power divided by FULL OFF at a reduced diode power, as driven by the TI controller when large swaths of black are being displayed. Therefore, reflecting more efficient use of the SSI source. Variable "black" brightness effectively gives a "blacker" black and therefore a higher ratio.
The APM 10,000:1 contrast ratio is particularly applicable to our SPAN Workspace solution, which has a primarily black background.
Last updated: September 12, 2018