Intel D2500 DF8064101055400 Scheda Tecnica
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Datasheet - Volume 1 of 2
7.2.4.2
Intel® Display Power Saving Technology (Intel® DPST)
This is a mobile only supported power management feature. 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.)
2. Intel DPST subsystem applies an image-specific enhancement to increase image
contrast, brightness, and other attributes.
3. A corresponding decrease to the backlight brightness is applied simultaneously to
produce an image with similar user-perceived quality (such as brightness) as the
original image. Intel DPST 5.0 has improved the software algorithms and has minor
hardware changes to better handle backlight phase-in and ensures the documented
and validated method to interrupt hardware phase-in.
7.2.4.3
Intel® Automatic Display Brightness
This is a mobile only supported power management feature. 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
back light setting.
7.2.4.4
Intel® Seamless Display Refresh Rate Switching Technology (Intel®
SDRRS Technology)
SDRRS Technology)
This is a mobile only supported power management feature. When a Local Flat Panel
(LFP) supports multiple refresh rates, the Intel® Display Refresh Rate Switching power
conservation feature can be enabled. The higher refresh rate will be used when on
plugged in power or when the end user has not selected/enabled this feature. The
graphics software will automatically switch to a lower refresh rate for maximum battery
life when the notebook is on battery power and when the user has selected/enabled
this feature.
There are two distinct implementations of Intel SDRRS—static and seamless. The static
Intel SDRRS method uses a mode change to assign the new refresh rate. The seamless
Intel SDRRS method is able to accomplish the refresh rate assignment without a mode
change and therefore does not experience some of the visual artifacts associated with
the mode change (SetMode) method.