Specification Sheet

Datasheet, Volume 1 of 2 77
Power Management
Intel S2DDT is most effective with:
• Display images well suited to compression, such as text windows, slide shows, and
so on. Poor examples are 3D games.
• Static screens such as screens with significant portions of the background showing
2D applications, processor benchmarks, and so on, or conditions when the
processor is idle. Poor examples are full-screen 3D games and benchmarks that flip
the display image at or near display refresh rates.
4.6.2 Display Power Savings Technologies
4.6.2.1 Intel
®
(Seamless & Static) Display Refresh Rate Switching
(DRRS) with eDP* Port
Intel DRRS provides a mechanism where the monitor is placed in a slower refresh rate
(the rate at which the display is updated). The system is smart enough to know that
the user is not displaying either 3D or media like a movie where specific refresh rates
are required. The technology is very useful in an environment such as a plane where
the user is in battery mode doing E-mail, or other standard office applications. It is also
useful where the user may be viewing web pages or social media sites while in battery
mode.
4.6.2.2 Intel
®
Automatic Display Brightness
Intel Automatic Display Brightness feature dynamically adjusts the backlight brightness
based upon the current ambient light environment. This feature requires an additional
sensor to be on the panel front. The sensor receives the changing ambient light
conditions and sends the interrupts to the Intel Graphics driver. As per the change in
Lux, (current ambient light illuminance), the new backlight setting can be adjusted
through BLC. The converse applies for a brightly lit environment. Intel Automatic
Display Brightness increases the backlight setting.
4.6.2.3 Smooth Brightness
The Smooth Brightness feature is the ability to make fine grained changes to the screen
brightness. All Windows* 10 system that support brightness control are required to
support Smooth Brightness control and it should be supporting 101 levels of brightness
control. Apart from the Graphics driver changes, there may be few System BIOS
changes required to make this feature functional.
4.6.2.4 Intel
®
Display Power Saving Technology (Intel
®
DPST) 6.0
The Intel DPST technique achieves backlight power savings while maintaining a good
visual experience. This is accomplished by adaptively enhancing the displayed image
while decreasing the backlight brightness simultaneously. The goal of this technique is
to provide equivalent end-user-perceived image quality at a decreased backlight power
level.
1. The original (input) image produced by the operating system or application is
analyzed by the Intel DPST subsystem. An interrupt to Intel DPST software is
generated whenever a meaningful change in the image attributes is detected. (A
meaningful change is when the Intel DPST software algorithm determines that
enough brightness, contrast, or color change has occurred to the displaying images
that the image enhancement and backlight control needs to be altered.)