Touch screen monitor public display intel open pluggable specification ops slot 6 touch points screen size 55 inches max resolution 1 920 x 1 080 pixel response time 6 ms aspect ratio 169 contrast ratio typical 4 0001 brightness 630 cdm widescreen dot pitch 0 634 mm viewing angle 178176 pixel density 4005 ppi hdcp enabled horizontal frequency range 31 5 73 khz vertical frequency range 47 63 hz number of hdmi inputs 1 number of displa