Acer AT2001 AT2001 Service Guide - Page 14

Note 1: Ambient temperature = 25 . Note 2: To be measured in dark room after backlight warm up 30 minutes. Note 3: To be measured with a viewing cone of 1 by Topcon luminance meter ELDIM EZContrast 160D. Note 4: To be measured with the detector PR880 Note 5: Definition of response time: The output signals of BM-7 are measured when the input signals are changed from "Black" to "White" (falling time) and from "White" to "Black" (rising time), respectively. The response time interval between the 10% and 90% of amplitudes. Refer to figure as Response Time The response time is defined as the following figure and shall be measured by switching the input signal for "black" and "white". Tr TfD 100 90 Optical Response Note 6. Definition of contrast ratio: Contrast ratio is calculated with the following formula. Contrast ratio (CR)= Brightness on the "white" state Brightness on the "black" state Note 7: Driving conditions for CCFL: IL= 6.5 mA, 52KHz Frequency.