Logitech MX Revolution Cordless Laser Mouse 931689-0120 用户手册
产品代码
931689-0120
Innovation Brief: Logitech MicroGear Precision Scroll Wheel – Page 3
SmartShift™ Technology
Simple though it might seem, shifting into
hyper-fast mode is a complex engineering task.
Devising a solution required reinventing not just
the scroll wheel itself, but development of
nearly a hundred individual components,
including the wheel’s supporting chassis and
rotational sensors. The solution even required
the introduction of a miniature low-power motor
to retract the ratcheting mechanism for free-
spinning – a first in a handheld pointing device.
Controlling these integrated components
required the development of highly specialized,
and efficient, embedded logic.
hyper-fast mode is a complex engineering task.
Devising a solution required reinventing not just
the scroll wheel itself, but development of
nearly a hundred individual components,
including the wheel’s supporting chassis and
rotational sensors. The solution even required
the introduction of a miniature low-power motor
to retract the ratcheting mechanism for free-
spinning – a first in a handheld pointing device.
Controlling these integrated components
required the development of highly specialized,
and efficient, embedded logic.
Logitech’s SmartShift technology detects the
current active application window and automatically applies the scrolling mode that best fits the
task at hand. For example, when a Microsoft Word® document is the user’s focus, the wheel
defaults to free-spin mode, but sets itself to click-to-click mode when the user is navigating
photos in the My Photos folder. For some applications, such as Microsoft Excel®, Logitech’s
technology also senses the speed at which people spin the wheel – if it is spun fast, the wheel
goes into free-spin mode; if it’s spun more slowly, the wheel shifts into click-to-click mode. In
addition, with Logitech’s accompanying SetPoint® software, users can specify the start-up
mode – free-spin or ratcheting – for virtually any application.
current active application window and automatically applies the scrolling mode that best fits the
task at hand. For example, when a Microsoft Word® document is the user’s focus, the wheel
defaults to free-spin mode, but sets itself to click-to-click mode when the user is navigating
photos in the My Photos folder. For some applications, such as Microsoft Excel®, Logitech’s
technology also senses the speed at which people spin the wheel – if it is spun fast, the wheel
goes into free-spin mode; if it’s spun more slowly, the wheel shifts into click-to-click mode. In
addition, with Logitech’s accompanying SetPoint® software, users can specify the start-up
mode – free-spin or ratcheting – for virtually any application.
Shifting into the free-spin scrolling mode requires disengaging the internal ratchet mechanism, a
small, hardened steel ball embedded in a spring-mounted ratchet arm. The steel ball rides up
and over the molded detents in the wheel’s hub, generating the high-precision click-to-click
scrolling. When a user flicks the scroll wheel, this motion is detected instantly. SmartShift
signals from the onboard microprocessor activate a solid-state switch, or H-Bridge, which allows
the mouse’s micro-processor to turn the motor on and off, as well as to reverse the rotation
direction. Once activated, the H-Bridge applies a minuscule electric current to the miniature
direct-current motor. Unlike typical motors spinning at hundreds or thousands of revolutions per
second, this motor rotates its central shaft by only 275 degrees, just enough for a cam mounted
on it to nudge the ratchet arm and its hardened steel ball clear of the molded wheel hub The
transition process from click-to-click to free-spin mode typically takes less than 40 milliseconds
(40-thousandths of a second – less than the blink of an eye!). The electrical current required for
this operation is minute and does not constitute a noticeable cordless-mouse battery drain.
small, hardened steel ball embedded in a spring-mounted ratchet arm. The steel ball rides up
and over the molded detents in the wheel’s hub, generating the high-precision click-to-click
scrolling. When a user flicks the scroll wheel, this motion is detected instantly. SmartShift
signals from the onboard microprocessor activate a solid-state switch, or H-Bridge, which allows
the mouse’s micro-processor to turn the motor on and off, as well as to reverse the rotation
direction. Once activated, the H-Bridge applies a minuscule electric current to the miniature
direct-current motor. Unlike typical motors spinning at hundreds or thousands of revolutions per
second, this motor rotates its central shaft by only 275 degrees, just enough for a cam mounted
on it to nudge the ratchet arm and its hardened steel ball clear of the molded wheel hub The
transition process from click-to-click to free-spin mode typically takes less than 40 milliseconds
(40-thousandths of a second – less than the blink of an eye!). The electrical current required for
this operation is minute and does not constitute a noticeable cordless-mouse battery drain.
With the ratchet mechanism disengaged, the scroll wheel can spin freely, allowing the user to
hyper-scroll great distances. In testing, scrolling vertically through up to 9,000 rows in a
spreadsheet is easily achieved. Similarly, scrolling through hundreds of pages in a document is
accomplished with ease. As the wheel comes to a stop, the cam rotates in the opposite
direction, re-engaging the ratchet mechanism and returning the mouse to normal operation.
hyper-scroll great distances. In testing, scrolling vertically through up to 9,000 rows in a
spreadsheet is easily achieved. Similarly, scrolling through hundreds of pages in a document is
accomplished with ease. As the wheel comes to a stop, the cam rotates in the opposite
direction, re-engaging the ratchet mechanism and returning the mouse to normal operation.
Conclusion
As documents continue to grow in length and content becomes more complex, navigation
technology must evolve to keep pace. By rethinking the very nature of the scroll wheel – and the
materials from which it is made – Logitech MicroGear Precision Scroll Wheel ensures that
today’s computer users navigate with the highest levels of efficiency.
technology must evolve to keep pace. By rethinking the very nature of the scroll wheel – and the
materials from which it is made – Logitech MicroGear Precision Scroll Wheel ensures that
today’s computer users navigate with the highest levels of efficiency.