The Codex Prototype From Microsoft Research

Ken Hinckley from Microsoft Research is working on a prototype project known as The Codex, where it will merge two OQO Model 02’s that will take advantage of a multiple tablet PC configuration. The Codex is definitely mind blowing - but hopefully battery technology will be able to keep up with the two crisp displays, as we all know that lovely screens tend to drain power faster than beleaguered banks eat up our tax dollars in a financial bailout.

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The big idea there being that the device adapts to different tasks, and actually uses the dual screens as two screens as opposed to one large screen. As should be clear, however, this is very much a research project, and there's no indication of an actual product in the offing, although, as Ken points out, there's not much stopping anyone from building their own -- you'll just have to bring your own code.

From : community.research.microsoft.com

The Microsoft Research Codex: Are Dual Screens the Future of Mobile Devices?
Never buy one of anything. That's advice you should stand by when you're buying unusual gadgets. The advice was good when Randy Pausch offered it to me some 15 years ago, and it's still good now.

Of course, with 18 month old twin girls at home, this has become second nature to me. Two boxes of diapers. Two gallons of milk. Two Elmo plush dolls.

Oh, and yes, of course. Two screens for my tablet computer.

Dual-screen devices have become the subject of increasingly elaborate internet fantasies. Now, rumors about an Apple "Brick" device have stirred up dreams of future tablets, such as the alluring One Laptop Per Child v2.0 concept photos, which now orbit the internet once again.

My interest in dual-screen devices goes back a lot further, though, and was really spurred on by the University of Maryland dual-screen e-book reader project. That effort is led by Francois Guimbretiere, who is a long time collaborator and friend. I had some ideas to build on what his team had done, but also to take things in a different direction.

First of all, I wasn't interested in an ebook reader. I wanted a device that was all about writing. Sure, reading and writing go hand in hand - you encounter cool ideas and search out reference material on the web-but what I wanted to build was a tool for thought. To me that means a tool with writing, sketching, and annotating as the core of the experience.

I'd been thinking for a long time about picking up an OQO Model 02 computer. My team has an extensive code base for pen-and-tablet functionality resulting from InkSeine, and the OQO runs it out of the box. It's got an active digitizer for high fidelity pen input, and it's the smallest slate Tablet PC that money can buy. That's a pretty good start on a small form-factor tool for thought.

So when it came down to it, just how many of those OQO Model 02's do you think I purchased?

Project "Codex" was born.
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Twice the Screen at Half the Size

Here's the Codex packed up for mobility. It folds up quite nicely and has a moleskine-style knitted elastic strap to hold it securely shut. There's a loop for the pen and a mesh pocket so you won't lose small accessories, business cards, or receipts that you collect in your travels.
Sure, it's a bit of a brick at present. The whole thing weighs just over 2 pounds. The OQO's are considerably thicker than I'd like. But my goal is to prototype the future as quickly as possible and start living it. The OQO offers a handsome, jet black time-travel machine in that regard.

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Sure, it's a bit of a brick at present. The whole thing weighs just over 2 pounds. The OQO's are considerably thicker than I'd like. But my goal is to prototype the future as quickly as possible and start living it. The OQO offers a handsome, jet black time-travel machine in that regard.

Don't underestimate the ability to quickly pack up with the screens protected. Folding the Codex in half makes it comfortable to carry and easier to stuff into my gadget bag. It's a self contained kit for ultra-mobility.

The Codex is Not a Container for Dead Trees

A codex is just an archaic term for a bound book. But this Codex is unlike any book that you've ever read. It's not a long linear text that you flip through. To me, there's no use in going to all the trouble to build a dual-screen tablet prototype and write elaborate software just to mimic a traditional book. This is the 21st century and it's about time we moved past containers for dead trees.

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We have lots of information sources. We have multi-tasking. We have hyperlinks. We have split attention. We have a left brain and a right brain and we rarely do one thing at a time any more.

A Separation of Concerns

The Codex has two screens, it's designed to be used that way, and you won't find any half-apologetic demos that try to mash them back together into one big screen. Instead, it's all about the intelligent partitioning of tasks and interface elements across the screens.

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Above is one example where I'm working on a blog post that I've had planned for a while. On the left I have a whole bunch of cool photos that I found tagged with moleskine on Flickr. I was browsing through these as inspiration for our InkSeine digital note-taking software. On the right I'm organizing bits and pieces from these photos along various themes. So I just take a snapshot from the collection on the left screen and it appears in my notes on the right screen, where I can arrange it and mark it up as I see fit. I can scroll back and forth on the left screen to find a photo that meets my current needs, while the page that I am authoring on the right screen always remains visible. The two screens are invaluable because I always have the reference material in the context of what I am working on, instead of feverishly flipping between them on a single screen.

Can I do this on a single large screen? Well, sure, I could monkey with the window placements and get everything arranged just so. But that takes a lot of effort and the temptation to expand windows to take over the full screen is hard to resist if I have to expend effort to do so. A dual-screen device that understands the partition between the screens gives a much simpler experience where I don't have to constantly manage the set-up of the windows.

Navigate without Losing the Big Picture

Here's another example. I'm further along with authoring my blog post now, and I have a bunch of material floating around in my notes. I create a page that is a Table of Contents, with links to several themes that I've identified in my Flickr moleskine investigations. If I open a link, such as my Creative Collage page, it opens on the opposite page. I don't even need a "back" command to return to where I was - I still have my navigational structure on the left, side-by-side with my content page on the right.

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Unlike a traditional dead-tree book, I have no physical restriction that forces me to view consecutive pages - The Codex lets me follow links or flip through the screens separately to view any two pages together.

Working Big and Small

We can draw some inspiration from traditional media as well. In magazines and books, sidebars are a distinct section of a page that augments the main text with auxiliary information. Well, the Codex has sidebars on steroids. I can take any chunk of my notes, make it into a sidebar, and then arrange a bunch of these on a page. Here, I've made a storyboard page consisting of six sidebars. When I tap on a sidebar in one of the storyboard cells, it expands to full size on the opposite screen. I can plot out the broad sweep of my story on one screen, while maintaining full access to the zoomed-in details on the other.

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Your Mother Was Right - Posture is Important!

Perhaps the coolest property of a dual-screen device is that the compact, mobile form-factor encourages shifting the device around. I can orient the screens with respect to one another, stand the device up, look at the screens in portrait or landscape, and so forth. In fact, the Codex supports about a dozen different configurations. We call these postures. (A colleague, Michael Miller, coined this term).

Add two cups of accelerometers, a dash of flex sensors, and bake with some simple software to fuse it all together. Out of the oven pops an intelligent dual-screen display system that configures itself depending on how you arrange it.

For example, if I want to work in landscape, I can flip the device into the laptop posture, as opposed to the book posture that I've been showing so far. Now I have one screen that's angled for easy reading, plus another screen that's horizontal for easy writing.

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Or I can use the laptop posture to hook up one of my screens to a projector. I put the public part of my presentation on the top screen, while the controls to drive the presentation and my private notes are confined to the bottom screen.

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Now perhaps I meet a friend in a café and I want to show him what I'm up to. I can just lift up on the binding of the Codex to angle the screens so that one is facing me and one is facing my friend (below, left). We call this the battleship posture - as in "You sank my Battleship!" Each person has one screen with a private view. The Codex automatically configures the software for shared whiteboarding so the collaborators can mark up the screens, pass notes back and forth, and other such foolishness.

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Next I drop the binding back flat. Now both of us can view the screens, but one screen is oriented towards each person.

Don't Get Too Attached

Something that turned out to be surprisingly useful is that the Codex allows me to pull each screen right out of the binding. A firm pull pops it out, a firm press pops it back in. This is really handy for laying out the screens to suit my work, or to review a video while I jot down some notes. I can even hand the screen to another person to show them something - without actually giving them an electronic copy of the information.

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What? You Still Have a Desktop Computer?!?

The Codex is just another wireless device so of course I can connect it to my desktop computer. Now, any screen capture that I take from my desktop screen shows up in my Codex notes right where I left off. For web pages, the snapshot comes across with a hyperlink back to the source, so I can easily revisit it later when I'm reviewing my notes on my Codex. This makes it the perfect companion no matter how I'm working.

A Parting Shot at Text Entry

The Codex is designed around doing most things with a pen, but I'm no idiot. When it comes to text entry, a keyboard is a good thing.

And that, in part, is why I'm puzzled that so many of the dual-display concept designs that I've seen take up a whole screen with a virtual keyboard. I'm sure people in focus groups ask for this. But I still think it's a really bad idea. What is the point of having two screens if you are instantly going to cover one of them with a picture of a keyboard? Your hands immediately occlude it from sight anyway. At that point I'm basically using a single screen again, so I might as well just grab my laptop to get a decent keyboard.

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The Codex offers a solution for text entry that I much prefer, by virtue of the OQO Model 02's mechanical keyboard. I just slide the screen up and that reveals the keyboard when I need it. Works great. No dorky touchscreen keyboard. I still enjoy the full benefits of partitioning my work between the two screens. That's the way I like it.

When Can I Buy One?

The Codex is a prototype-- and a rather flaky, cobbled-together one at that. But it uses off-the-shelf devices, and there's nothing magical about the software. So the crass answer is that you can have one now if you are willing to spend some dollars, build yourself a custom binder, and write a little bit of code. That's how I started. My first prototype was a repurposed day-planner with Velcro holding the screens in there. Install a shared clipboard utility and you can start copying and pasting between screens. That will give you just enough of the experience that you will hunger for more.

What would you want out of a dual-screen device? What capabilities would make it most useful to you? How do you see dividing your own work between two screens?

In the meantime, the trajectory of ultra low-power "e-ink" displays bears watching. Check out the recent Plastic Logic device, for example. Right now e-ink is an abomination for anything interactive, but eventually some display technology will get where we want it to go. Low-cost, low-power screens are crucial to make dual display devices a practical consumer device, rather than a research lab curiosity.

The sheer number of concept devices that have popped up in the last 6 months suggests that dual-screen devices are poised to take off in the near future. My hope is that our research on the Codex can help in some small way to unearth the full promise of such devices. I, for one, am convinced that dual-display devices have a well-motivated role to play in a future ecosystem of mobile devices.

In my office, at least, that future is already here. It's just not evenly distributed.

Acknowledgements

I would like to thank the following key contributors to this project:

Morgan Dixon
Raman Sarin
Francois Guimbretiere
Ravin Balakrishnan