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Interactive Multitouch Display

Interactive Multitouch Display
This multitouch display screen design is based on the description in Jeff Han's paper, Han, J. Y. 2005. Low-Cost Multi-Touch Sensing through Frustrated Total Internal Reflection. The figure below comes from his web site. An acrylic panel is edge lit with infrared leds. Since most hobbyists can't afford multiple projectors (i don't even own one, just borrowed it from dr.eel), my design uses a ceiling mount that swivels so that the projector can be used either in standard mode (say for watching movies) or can be aimed downwards, bouncing off a reflector and onto the multitouch display screen. The screen itself can be constructed from hardware store materials and hand tools. touchlib Related:  Tableau tactile

Make your own multitouch projected table Multitouch, it's all you bloody hear about these days. If another person stops me in the street or blocks my car in just to shout "Apple have invented a multitouch cellphone!" into my face, I'll scream. Okay, so a huge company spent over two years developing a compact screen that could respond to more than one finger jabbing at it. So what? It all relies on the wonderfully-named Frustrated Total Internal Reflection (FTIR), whereby the path of LED light internally reflected between a sheet of acrylic and a diffuser is changed by the touch of a finger or other object placed against the top acrylic. I'm really tempted to make one of these myself, it looks like great fun. Multitouch Table Experiment [via MAKE]

Comparison of 6 rear-projection films I tried to get my hands on as many of the projection films commonly used by members of the forum to do a side-by-side comparison for my own research. I still haven’t received my HoloLite and HoloGrey samples ($906 USD per sq. meter), but I’m tired of waiting so here are my results with the following films: Polymex 50 micron double matte drafting film ($2 USD sq. m) Rosco Grey ($12 USD sq. m) mind.unity@gmail.com’s film ($90 USD sq. m) IFOHA Digiline White (169 EURO sq. m) IFOHA Digiline Contrast (230 EURO sq. m) 3M Vikuiti ($566 USD sq. m) You may notice how dark the Vikuiti looks in comparison to the other films--this is not an error. The black level and color contrast are much better than the cheaper films, but without a sufficiently bright projector the image is dull (my projector is 1200 lumens). If you had a 3000 lumen projector it would look stunning. Here are my personal opinions of the films: *Drafting film: Nice and bright but looks washed out and has the lowest contrast ratio.

Build Your Own Multitouch Surface Computer Software So now we’ve completed the hardware section. The process of building a multi-touch computer is far from over, though, we need to get the software installed and configured so that we can actually use the thing. The central software that powered our rig is Touchlib , an open source library which takes the visual data received by the camera and parses it into touch events, which can be used by other programs to provide multi-touch control. Some programs implement this library directly, allowing for standalone multi-touch apps, while others, such as those written in ActionScript, require an extra software layer to allow the program to receive touch input. But, there’s something else we had to take care of first. Fortunately, PC users are famously unconcerned with what things are “meant to” do, and enterprising multi-toucher Alex Popovich has written a driver that allows the PS3 eye to be used with a computer. 1. 2. 3. 4. Now we'd gotten our PS3Eye up and running. 1. 2. 3.

15" TFT panel transformed to something more aesthetic; TransTFT From the side Top view Illuminated by the desklamp Close up from the corner In the dark Posing Conclusion If you feel that you have a good idea for an article or you have already written down one and would like us to post it in MetkuMods, just ask. Questions or comments? Past related articles in MetkuMods: Acheter Votre Tablette Tactile ou votre iPad avec Tablette Store - la Boutique de la Tablette Tactile ! - Huawei Ideos S7 Slim WiFi 3G 8Go avec Tablette Store - la Boutique de la Tablette Tactile ! Evolution de la précédente tablette tactile Ideos S7, cette version Slim WiFi 3G en corrige les principaux défauts. Le poids a été revu à la baisse, le processeur est plus performant, la quantité de RAM est augmentée et l'écran passe du résistif au capacitif. La finition est excellente pour un produit de cette gamme et la connectique, bien que peu nombreuse, couvre l'essentiel : microSD, microUSB, microHDMI et prise jack 3.5mm sont présentes. Un must pour découvrir le monde des tablettes sans se ruiner ! Pour plus d'infos techniques, cliquez l'onglet caractéristiques techniques.

LightPad connects your smartphone to an 11-inch screen, expands up to a 60-inch projection QP Optoelectronics to Launch LightPadTM for Smartphones at CES Suzhou, China – December 19, 2011. QP Optoelectronics Co. Ltd. announced today that it will be showcasing its novel LightPadTM product at the CES 2012 exhibition in Las Vegas, January 10-13, booth #37037 South Hall, Upper Level. The patent pending LightPadTM technology is an ideal companion device to extend the functionality and user interface of smartphones, providing the user with expanded utility via built-in 11" high contrast rear projection screen, up to 60" screen in front projection mode, and a full-size keyboard. Connected with a smartphone, The LightPadTM provides virtually all functions of a notebook computer for an individual. Notebook sized displays are not sufficient for many applications including small group meetings where PowerPoint presentations are common. Specification G1 (2012) G2 (2013) QP Optoelectronics has partnered with Texas Instruments, a leader in DLP- based microdisplays.

Multi-touch Table | CSP Research & Development Multi-touch displays are the natural evolution of the old touch screens as they are capable of recognising multiple touches at the same time. This way of dealing with the hardware (and applications) opens up a host of new opportunities for human-computer interaction, enabling the objects on a screen to be directly manipulated by the user. For this reason these techniques are also known as natural user interfaces. There are different ways to create multitouch screens, depending on the context of use and the size required for the display. The techniques that allow the realization of multi-touch hardware, are based on different solutions such as capacitive, resistive, motion, orientation, pressure and so on. How LLP works. Each vision based techniques consist of a camera, an infrared light source and a display. Laser Light Plane CSP Mutlti-touch table. In order to test multitouch applications at the development stage, CSP equipped itself with a dedicated hardware solution. Lasers Safety

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