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2010年12月13日星期一

Hands-on with Synaptics’ ClickPad Series 3.0 for the future Of Touch pad

Hands-on with Synaptics’ ClickPad Series 3.0 for the future Of Touch pad
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Building a better clickpad 300x225 Hands on with Synaptics ClickPad Series 3.0 for the future Of Touch pad
Building a better clickpad
When you get right down to it, laptops only consist of a few key parts as far as user interface is concerned. Keyboard, screen, speakers–and, of course, the touch pad. With multitouch tablets and smartphones changing the interface landscape drastically, it’s quickly becoming a multitouch world, and computers are the devices playing catch-up. Synaptics, makers of most multitouch touch pads used today, have a next-generation clickpad in development that hopes to close the gap quickly. Called the Series 3.0 Clickpad, it’s a wider, button-free click surface that’s the successor to clickpads seen in some current Windows laptops.
When it’s all boiled down, the ClickPad Series 3.0 offers several significant improvements:
  • More accurate finger recognition. The 3.0 Clickpad has 10-finger independent recognition on its capacitive surface, something more akin to what devices like the iPad have. Synaptics’ image-sensing technology on the touch pad also is far more accurate at locating the shape of the finger being used, and whether it’s a flat surface or something resembling a palm. This allows an override of the touch technology when a palm is accidentally placed on the surface when typing.
  • Multifinger gestures. Apple’s clickpad has had this for years, but the new Clickpad allows up to four-finger gestures and a wide variety of gestures to clear the desktop, browse back and forth between Web pages, and more accurately pinch-to-zoom and rotate. Four-finger swiping brings up a clever “deck” of open windows, which can be easily navigated between.
Top clicking Hands on with Synaptics ClickPad Series 3.0 for the future Of Touch pad
Top-clicking
  • Clicking anywhere. Current clickpads work like a giant lever, angling downwards from a hinge on the back. Apple’s clickpads don’t click well at the back end, and neither do equivalent Windows clickpads. Synaptics’ next-gen model is a large surface that can click down at any part of the pad. Sometimes the concept model felt a little loose, but in future pads it’ll be nice to engage in some top-clicking.
  • Scrybe. Synaptics is working on a gesture-based vocabulary for other clickpad-initiated controls. Some may involve drawing a question mark to begin a search, for instance. We welcome more features, but a gesture vocabulary will need cross-application support and could get confusing to master. We’re reminded of Graffiti for the Palm Pilot; hopefully, it won’t be as confusing.
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2010年12月9日星期四

How Lithium Batteries Work – Wholesale Electronic News


A new technique called electrochemical strain microscopy maps how lithium ions flow through a battery’s cathode material. This 1 x 1-μm composite image demonstrates how regions on a cathode surface display varying electrochemical behaviors when probed with ESM. Courtesy of Oak Ridge National Laboratory.
Figure7 How Lithium Batteries Work   Wholesale Electronic News
Figure7
Lithium-ion batteries have a number of advantages over other types of rechargeable batteries, including a good capacity-to-weight ratio, no memory effect and a slow loss of charge. They are not only highly popular for consumer electronics products, but also critical parts for future electric cars or as buffers for renewable yet noncontinuous energy sources such as solar cells.
Their main components are the anode and cathode electrodes separated by an electrolyte. The lithium ions move from the anode to cathode through the electrolyte during charge and discharge, producing electric work. The movement of lithium ions into and out of electrodes is central to the charge capacity and to the power of lithium-ion batteries; therefore, the processes of insertion (or intercalation) and extraction (de-intercalation) of ions are areas of active research.
The researchers say that, although the process has been extensively studied at the device level, it remains virtually unknown at the nanoscale level of grain clusters, single grains and defects.
One method used to date is atomic force microscopy (AFM) to study how the surface morphology of the electrodes changes while the battery is charging or discharging. Static strains can be derived from this and electronic currents mapped across the electrode surfaces. However, a dynamic study of the intercalation processes, strain charge and ion transport at the level of single-grain boundaries and dislocations in the electrodes is not possible with standard AFM alone.
This is exactly what the researchers have done with ESM, which they reported on in Nature Nanotechnology 5, pp. 749 to 754, published online Aug. 29, 2010. By using the tip of an AFM to concentrate an oscillating electric field onto the cathode of a lithium-ion battery, they triggered lithium ions to intercalate and de-intercalate in a small volume underneath the biased tip. This resulted in periodic changes of the cathode volume and a strain at its surface. The strain was then measured by the same AFM tip, leading to a map of the lithium intercalation and transport processes.
wholesaleeshop.com .au 1 300x225 How Lithium Batteries Work   Wholesale Electronic News
wholesaleeshop.com.au
A new technique called electrochemical strain microscopy maps how lithium ions flow through a battery’s cathode material. This 1 x 1-μm composite image demonstrates how regions on a cathode surface display varying electrochemical behaviors when probed with ESM. Courtesy of Oak Ridge National Laboratory.
Lithium-ion batteries have a number of advantages over other types of rechargeable batteries, including a good capacity-to-weight ratio, no memory effect and a slow loss of charge. They are not only highly popular for consumer electronics products, but also critical parts for future electric cars or as buffers for renewable yet noncontinuous energy sources such as solar cells.
Their main components are the anode and cathode electrodes separated by an electrolyte. The lithium ions move from the anode to cathode through the electrolyte during charge and discharge, producing electric work. The movement of lithium ions into and out of electrodes is central to the charge capacity and to the power of lithium-ion batteries; therefore, the processes of insertion (or intercalation) and extraction (de-intercalation) of ions are areas of active research.
The researchers say that, although the process has been extensively studied at the device level, it remains virtually unknown at the nanoscale level of grain clusters, single grains and defects.
One method used to date is atomic force microscopy (AFM) to study how the surface morphology of the electrodes changes while the battery is charging or discharging. Static strains can be derived from this and electronic currents mapped across the electrode surfaces. However, a dynamic study of the intercalation processes, strain charge and ion transport at the level of single-grain boundaries and dislocations in the electrodes is not possible with standard AFM alone.
This is exactly what the researchers have done with ESM, which they reported on in Nature Nanotechnology 5, pp. 749 to 754, published online Aug. 29, 2010. By using the tip of an AFM to concentrate an oscillating electric field onto the cathode of a lithium-ion battery, they triggered lithium ions to intercalate and de-intercalate in a small volume underneath the biased tip. This resulted in periodic changes of the cathode volume and a strain at its surface. The strain was then measured by the same AFM tip, leading to a map of the lithium intercalation and transport processes.
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