ELI101-IPHW
User’s Manual
5/28/20
Copyright ©2020
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10
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Extended Display Information Data (EDID)
ELI uses Extended Display Identification Data (EDID) for automatic configuration with many
operating systems. You can find out more on our website at
Brightness Control
ELI101-IPHW contains a Brightness Control potentiometer (VR1) on the backside of the board, see
Figure 6. Using this pot, you can set the default “Factory” brightness of the LCD Backlight. Turning
the pot fully clockwise results in maximum brightness of the display. Turning the pot
counterclockwise will reduce the brightness and then turn the backlight off.
Figure 6. Brightness Control Potentiometer (VR1)
PWM Control of Backlight
ELI provides an input for an external processor or SBC to control the brightness of the display
backlight, see Figure 7. Changing the backlight brightness also changes the total ELI power
consumption (the display backlight is typically one of the larger sources of power consumption in the
unit). PWM dimming is an input with a 0 to 3.3 VDC range and the user should drive this with a
push-pull type output or a suitable open collector output.
Brightness Control Potentiometer (VR1)
