Capacitive touch screens not all they are cracked up to be?

For about 2 years now capacitive touch screens has wowed audiences in the west, but ABI Research rang some warning bells regarding the headlong rush to adopt this new technology.

Capacitive screens, as found on the iPhone, HTC G1 and the Blackberry Storm, are renown for enhancing the touch experience. The lack of Windows Mobile phones with capacitive screens has been seen as one of the major failings of the platform. ABI Research director Kevin Burden however seeks to differ.

“The reality is that existing operating systems, legacy applications, and regional aspirations make the change to capacitive screens for many devices very challenging.”

The biggest issue that is preventing the adoption of capacitive screens is the burgeoning Eastern market, where alphabets are complex and styli are not held in contempt. A capacitive screen or QWERTY keyboard just won’t suffice in markets like China, for example.

In addition applications written for some of the high-end operating systems powering smartphones such as Windows Mobile and Symbian don’t lend themselves to capacitive navigation: there is a long legacy of third-party applications designed for five-way navigation, keypad, or stylus touch input. A change to capacitive screens would make it difficult to ensure continuity and backward compatibility.

Cost is also a major issue: resistive screens are far less expensive than capacitive.

Capacitive screens will continue to make inroads into high-end models,” concludes Burden, “but with the overall market volume still primarily in midrange devices, the resistive screens in devices in this tier will continue to keep resistive technology far ahead of capacitive.”

Source: Marketwatch.com

 

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About Surur

Site Admin and Windows Phone enthusiast, he has been using Windows Mobile devices since before they were called PocketPC’s. He is currently sporting a HTC 7 Trophy.

  • http://www.avianwaves.com Parrotlover77

    I have a Touch Pro. One of my managers has an iphone. I’ve used his quite a bit, setting up Exchange and so on. I have to say, a properly configured high quality resistive screen outshines a capacitive screen any day. Sure, the iphone (et al) has better touch response because it takes little force and no calibration to get proper on-screen keyboard response. However, how much better is “better?” In my experience, not much. It takes very little finger pressure to activate the on-screen Touch Pro keyboard. The biggest fault of the TP/Diamond’s onscreen keyboard is just the size. It’s small because the 2.8″ screen is small. The second “fault” is that swipe-scrolling is a shim ontop of the existing OS layer where scrollbars were king. It’s not perfect yet. Given time, the swipe-scrolling will improve greatly. Especially since WM7 and beyond will be much more “finger friendly” so swipe scrolling will be less of a kludge and more smoothly integrated.

    Despite these faults, which are mentioned over and over and over by capacitive screen fans, I think the resistive screen is superior for the following reasons:

    1. Stylus support. Precision is NOT POSSIBLE on capacitive screens since you can’t use a stylus. If you have a document (or web page) zoomed all the way out, there is no way to precisely click on the tiny link (or whatever) with your finger, but with a stylus — no problem! This is the biggest drawback. I use my fingers a lot and love finger-touch friendly apps. But when I need to get down to business taking notes, writing emails, scheduling appointments, etc., I can’t live without my stylus!

    2. HTC has found a way to discern whether you are using your finger or stylus. If I use my stylus, I’m selecting text (which you can’t even do on the iphone). If I’m sliding my finger, I’m scrolling. Holy crap this is the most useful feature like EVAH!!! It makes my manager with the iphone jealous!

    3. Response on lightest touch is not all it’s cracked up to be. Heck, there is an entire software market for the Diamond/Touch Pro because the screen is TOO sensitive and calls are answered in one’s pocket. Granted, with a capacitive screen this is less likely since you need to use your actual finger to activate the screen (most of the time), but it is still possible to click when you don’t want to because the screen responds to the lightest pressure (almost no pressure).

    4. Detecting pressure sensitivity is possible on the Touch Pro/Diamond’s resistive screen. This is awesome. I have not seen this implemented properly in the most killer apps that could really use it (such as art/drawing programs where pressure could equal pencil pressure for example), but it’s still possible. You can change / calibrate the sensitivity of the pressure sensor for TouchFlo, for example. I have never seen this at all on a capacitive device, so I’m not sure it’s possible.

    Just wait until resistive screens get multi-touch capability.

    Capacitive has it’s place. For example, it’s really cool on the diamond/pro’s bottom panel, but over the entire screen… I’m just not feeling it. :-)

  • scampcat

    Well you're dead wrong about capacitive screens not being able to use a stylus. There are a host of styli available for this type of screen. Naturally they're not a cheap piece of ABS plastic since they have to support a micro charge. But they're not expensive either. Bring on the capacitive screens. I have Windows Mobile, my wife has an iPhone. I HATE using my WM after using her iPhone. I've never seen a need for a stylus yet on her iPhone, but they are available. I can't tell you how annoying a resistive screen is. You can get them super-sensitive, but then you get false actions. You can turn down sensitivity, then you have to mash on the phone which causes inaccuracy in what you're trying to touch. I hate having to carry a stylus, getting it out to use it (introduce annoying delay in productivity), writing with a less-than-comfortable twig of plastic, etc. I've intentionally switched my UI to an iPhone-similar display because things are more spread out, and I still get false positives. VERY annoying. Let last decade's technology go the way of the floppy disk.

    • http://intensedebate.com/people/wmpoweruser wmpoweruser

      Thank god for the HTC HD2?

    • http://intensedebate.com/people/l3v5y l3v5y

      The capacitive styli out there are not exactly precise, a good resistive screen with a proper stylus is much more precise.

      Also, the capacitive technology itself is generally of lower resolution, so you can't get the same level of accuracy with capacitive as you can wtih resistive.

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