Hi, my company is using a DT022CTFT 2.2" TFT Module in a telephone application. When we turn off the backlight to the display, we no longer see any data on the display. Is this expected operation? In our old display, when the backlight was turned off, the data that was displayed was still present on the display, but was just very dim. We are trying to understand why there is a difference. So, if you turn off the backlight, does the display cease showing any display data?