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Tag: touchscreen

Are you hunched over your laptop while you give a presentation? Save both your posture and your presentation with this one incredible eco-friendly tip.

Background:

When giving a presentation on a large screen, there are two popular options for calling attention to specific areas of a slide deck:

  1. Physically gesture at the screen (or use a laser pointer, as seen in Figure 1).
  2. Use the laptop trackpad to move the mouse pointer / arrow around.

The issue:

The trackpad method—which requires the presenter to hover around their laptop—usually makes for a less engaging presentation, but it’s the only option for a presentation that requires real-time interaction.

So far, there’s been no way to combine the best of both worlds: 1) the direct-pointing of the laser pointer and 2) the ability to affect the on-screen user interface elements.

 

laser-remote

Fig. 1: Presentation remotes often consist of a slide advance button, a “back” button, and a laser pointer. Some of them also have a gyroscopic mouse, but this feature usually controls awkwardly at best.

Proposal:

Until now, that is!

In this proposal, the presentation remote (and laser pointer) will allow the user to point the laser at an element on the screen (say, a “play video” button), click a button on the remote, and have the on-screen element respond (in this case, playing the video).

The system works as follows:

  • The presentation remote is paired to the presenter’s laptop already, in order to allow the slide advance button to work. This is a normal feature of all presentation remotes.
  • The remote also gets a “reference” image of what’s on the laptop screen at the exact moment. This doesn’t have to be high-resolution; the remote just has to know generally what the screen looks like, updated a few times per second.
  • The remote also also contains a camera, so it can see what its laser pointer is pointing at.
  • So when the presenter points a laser at the large presentation screen, the remote now knows exactly what element the laser is hitting, since it can compare the camera image to the reference image of what’s on the laptop.

This allows the user to essentially turn the presentation screen into a giant touchscreen.

For a touch-aware operating system (e.g. iOS, Android, or Microsoft Windows), this would require no additional software support beyond sending a simulated touch event at the laser-pointer-pointed-at location.

laser-pointer-touchscreen

Fig. 2: The remote has a camera in it, so it can compare what it’s pointing at to the “reference” image from the presenter’s laptop: if the images mostly match, the remote can figure out exactly what the laser pointer is pointing at.

Conclusion:

If you thought it was TOO EASY to set up a presentation these days, this new and complex system will guarantee at least 15 minutes of “wait… hang on, I think I’ve got it working…. no, huh. Is it input 1, or input 2?” at the beginning of every presentation.

PROS: Prevents deforestation by reducing the number of wooden presentation pointers that will be manufactured.

CONS: May reduce deforestation so much that plants grow rampantly across the globe, killing all animal life and depleting the atmosphere of carbon dioxide. All because you couldn’t be bothered to walk over to your laptop to move the mouse!!!

Upon seeing this cell phone and realizing it is not for sale, you will gnash and grind your teeth in rage. Dentists hate it!

Background:

Nearly all modern cell phones have the same touch-screen form factor.

Except for a few buttons of low importance (e.g. volume adjustment, power, camera shutter), all interaction is done through the screen itself.

The issue:

This style of interaction makes use of only one finger, and leaves the remaining four fingers with nothing to do (except hold the phone).

It can also be difficult to reach across the entire phone with one thumb. Finally, one’s grip of the phone is significantly diminished when interacting with the phone, making it easier to drop it during interaction with an app or web page.

plainhand

Fig 1: Modern phones typically have a form factor similar to the one at left. Right: when holding the phone, the thumb (labeled “5”) does all the work, while fingers 1–4 flop about uselessly on the opposite side of the phone.

Proposal: additional hardware keys on the phone edges

In order to improve phone-handling characteristics, we can add easy-to-press hardware keys to the edge of the phone.

Let us assume that this phone will be intended for right-handed operation. See figure 2 for the proposed button layout.

buttons default with slide or scroll wheel

Fig 2: On the left edge of the phone, four keys (one for each finger) are added.

On the right edge of the phone, a slideable switch is added. This acts as a scrollwheel; it can be pressed in to click, or slid up or down to scroll a web page. This is an old idea seen most notably in the “thumb scrollwheel” in Blackberry phones ~2000–2010.

Slight downside: these new features are unusable when the phone is held in the left hand.

chorded keyboard

Fig 3: The new buttons on the left (numbered 1–4) would allow for typing in the fashion of a chorded keyboard (https://en.wikipedia.org/wiki/Chorded_keyboard). With 4 buttons, we have (2^4 – 1) = 15 possible letters.

rings

Fig 4: If full typing ability is desired, it would be possible to make the buttons into rings instead, allowing the buttons to be pulled out instead of just pushed. Now we are up to (3^4 – 1) = 80 possible combinations of letters when typing in a chorded keyboard fashion. This is more than enough for any alphabet.

(Note: the thumb ring in this diagram would need to pivot in order to allow a comfortable grip.) would have to be rotated almost 90 degrees to allow for a comfortable grip.)

Conclusion:

Although this new interaction style could take some time to get used to, it would greatly improve phone interaction efficiency.

PROS: Makes phone interaction faster. Makes it easier to hold the phone in a secure grip.

CONS: If no one drops their phones anymore, phone case manufacturers may go out of business.