Dell Optimizer Version 1.0 User's Guide
Proximity Sensor
Proximity Sensor is an integrated feature in Dell laptops and mobile workstations. The sensor detects your presence when you are in front of your system and within the field-of-view (FOV) of the sensor. When you move out of the FOV of the sensor, the brightness of your system display reduces and locks your system based on the preferred lock time settings. When you walk in to the FOV of the sensor, the system display turns on and the login screen appears.
When Proximity Sensor is enabled, it can be accessed when the system is on or in modern standby (sleep) state, and when the system is in clamshell or tablet mode.
Proximity Sensor supports the following capabilities:
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Walk Away Lock—When you move out of the FOV of the sensor, the display dims, system locks, and the display is turned off based on the lock timer configured in Dell Optimizer. The system then enters modern standby state. This feature secures your system and saves power when you are away from it.
Walk Away Lock is suspended when:
- Snooze is enabled in Dell Optimizer.
- User activity is detected through a keyboard, mouse, or a touchpad.
- An application running on the system is requesting audio or display power from the operating system. For example, when you are using Skype during an active call, and when you are streaming video in Windows Media Player.
- An external monitor is connected and the proximity sensor feature is disabled.
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Wake On Approach—When you walk into the FOV of the sensor, the system wakes from modern standby, turns on the display and displays the Windows login screen. This feature enables faster sign-in as you approach your system. If you have set up the Windows Hello feature, the camera recognizes your face and Windows automatically unlocks your system. If you have not set up Windows Hello, you have to enter your system password to unlock your system.
Wake On Approach is suspended when:
- The battery is low and the system is not plugged in to a power source.
- An external monitor is connected and the proximity sensor feature is disabled.
- Keep Alive—It prevents Windows from turning off the display, and ensures that the system does not enter sleep state when:
- The system is plugged in to a battery source.
- The user is present in the FOV but not actively engaged with the system.
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