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Press to switch the video image between the display only, the external device only, or the display and the external device simultaneously. When you start the computer with an external device (such as an external monitor or projector) attached and turned on, the image may appear on either the computer display or the external device. It does not control the brightness on any external monitors or projectors. NOTE: The ambient light sensor adjusts the display backlighting on your portable computer only. NOTE: Rebooting the computer returns the ambient light sensor to the last setting of enabled or disabled. For more information about QuickSet, right-click the icon in the taskbar, and click Help. You can also adjust maximum and minimum brightness settings that are activated when you enable the ambient light sensor feature. NOTE: The ambient light sensor is disabled when your computer is connected to an electrical outlet.ĭell QuickSet allows you to enable or disable the ambient light sensor. If you enable the ambient light sensor and then use any of the display brightness key combinations, the ambient light sensor is disabled and the display brightness is increased or decreased accordingly. The ambient light sensor is disabled when your computer is shipped to you. If covered up, the ambient light sensor automatically sets the display brightness to the minimum level.
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NOTE: Do not cover the ambient light sensor with any adhesive labels. You can enable or disable the ambient light sensor by pressing the and left-arrow key The ambient light sensor detects available environmental light and automatically increases or decreases the display backlighting to compensate for low-light and high-light environments.
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The ambient light sensor is located on the bottom of the computer display panel.
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When a Dell computer is running on battery power, you can conserve power by setting the brightness to the lowest comfortable setting by pressing and the up- or down-arrow key on the keyboard. Setting Display Resolution and Refresh Rate Using the Display: Dell Latitude D630/D630c User's Guide
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