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  • Resistive | Technology
    conductive layers separated by a gap When an object touches the surface the layers are connected causing a change to the electrical current which registers as a touch event Limitations Resistive is expensive to produce The overlays include wiring 4 5 and 8 wire Only the 4 wire is cheap to produce but it generates low image clarity Also anti glare glass is problematic as it diffuses the light causing

    Original URL path: http://www.lumio.com/Technology/resistive.html (2016-04-27)
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  • SAW | Technology
    ultrasonic waves registers the position of the touch event and sends this information to the controller for processing When the sound waves are transmitted across the surface they spread across the screen by bouncing off reflector arrays along the edges of the screen Receivers detect the waves When the user touches the glass surface the finger absorbs part the of energy of the sound wave the controller measuring the touch

    Original URL path: http://www.lumio.com/Technology/saw.html (2016-04-27)
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  • Sensing & Illumination Modules | our core technology | content
    over panels up to 100 inches in size The sensor die PCB lens optical filter and connector are incorporated into a thin housing structure as shown in the attached figure Illumination Modules The Active Barrier illumination module is comprised of a customized edge emitting plastic optical light guide that runs along the edge of the screen These light guides are illuminated from the ends with infra red LEDs and emit a thin planar beam of light that completely fills the sensing region The patented light guide is designed to extract light uniformly along the length of the light guide and focus into a highly parallel planar beam It is the position of this plane of light which taken with the sensing modules determines the precise height of the sensing plane For small sensing regions we use illuminators as thin as 1 mm whereas for larger screens light guides of 2 to 3 mm thick are typically used In either case the finger or object must be brought essentially into contact with the surface to break the beam as with an ordinary touch screen The light guides and LEDs are inserted into a thin plastic housing that is bonded directly to

    Original URL path: http://www.lumio.com/our-core-technology/sensing-a-illumination-modules.html (2016-04-27)
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  • Single and Dual touch operation | our core technology | content
    sensor modules located in adjacent corners at the top of the panel and illumination modules along the other three sides This system can clearly identify and locate any single touch anywhere in the sensing region This system can also do a very good job of recognizing simple two touch gestures such as zoom in zoom out and rotate commands As seen in the figure although there is a theoretical ambiguity when two objects are placed on the screen simultaneously the relative motion of the detected positions can be interpreted unambiguously For example as the physical objects are separated all four potential object points will move apart from each other Similarly for zoom in and rotate motions the analysis is straight forward It is also possible in many cased to absolutely track the two individual points by relying on history of the motion speed direction or the sizes of the objects particularly as the sensing is quick enough so that the two events were introduced during the same frame Nevertheless such tracking becomes confused when objects cross each other and can be a source of much angst to application developers Many touch screen suppliers refer to this type of tracking incorrectly

    Original URL path: http://www.lumio.com/our-core-technology/single-and-dual-touch-operation.html (2016-04-27)
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  • Full Dual (two touches) and Multi (three to six touches) support | our core technology | content
    into the system This can be seen in the Figure below where two additional sensors are added in the lower two corners and the Active barrier illumination is extended along the upper side of the panel This four sensor system can easily resolve the two touch of the previous example and can be extended to track a minimum of four and in most cases up to six touches with absolute

    Original URL path: http://www.lumio.com/our-core-technology/full-dual-two-touches-and-multi-three-to-six-touches-support.html (2016-04-27)
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  • Virtual Touch Layer | our core technology | content
    with image processing algorithms keeps the system in the digital world with all the benefits that digital systems bring drift free aging free and excellent noise immunity which all analog systems suffer from The heart of the system and much of Lumio s IP lies in the system architecture and in the algorithm implemented both in the optics and in the processing unit As such Lumio s system is based on simple standard components presenting low risk to the customer in terms of supply chain reliability MTBF temperature range and qualifications for different standards As the system detects events as light signals it can be sealed behind the glass without exposing any electrical mechanical parts or wiring making it attractive to applications that require this capability for robustness safety environmental exposure or simply industrial design considerations The Sensing Technologies Lumio has developed several sensing technologies which cover the gamut of sensing applications Depending on the sensitivity resolution and acquisition speed requirements along with price and opto mechanical constraints Lumio can tailor a solution to any requirement Broadly speaking the technologies can be divided into two classifications 1D Low Profile Sensing Technology The 1D sensing technology has the advantage that both the illumination and sensing modules lie within the sensing plane i e there can be essentially no physical protrusion above the detection surface 1D sensing typically uses a highly efficient low cost IR LED illumination module and depending on resolution requirements one or more 1D sensing modules Regardless of the implementation all the active components lie along a single side of the interaction region with higher resolutions achievable by using more than one sensor separated by a baseline Depending on the application we employ a range of measurements looking at reflection time of flight of light and a range of

    Original URL path: http://www.lumio.com/our-core-technology/virtual-touch-layer.html (2016-04-27)
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  • Projection and Display Options | our core technology | content
    order to miniaturize the assembly and simplify the alignment the collimating lens 1 also serves as the mechanical mount for the diode laser 2 and the diffractive optical element DOE 3 This structure is molded from a single piece of plastic to which the diode laser is actively aligned and fixed in place The DOE is then snapped into the assembly from the other side without requiring any additional alignment A heat sink 4 is then attached to the laser diode to complete the assembly 3 Schematic illustration of the diffractive micro projector module assembly A picture of the fully assembled micro projector module is shown in 4 The entire projector assembly measures less than one cubic centimeter Provided that the projection geometry is the same the module can accept different DOEs to project different templates An example of a Japanese English projected keyboard layout is shown in 5 4 Micro projector module with heat sink and laser driver 5 Virtual keyboard accessory with static diffractive module projecting a Japanese English keyboard layout Dynamic projectors and modules When it is necessary to modify the projected template in response to user input diffractive elements are not applicable While variable diffractive projectors are currently being developed for example real time calculation for a reflectiveLCOS matrix they do not yet provide sufficient quality to project highquality image templates Relatively small LEDbased projectors using DLP matrixes are also being developed by a number ofcompanies but nothing that is available today meets the form factor price and power consumption requirement for a projected dynamic interface LCD micro projectors Design constraints As mentioned above virtual interface often must be projected from a very low height onto a nearby surface at a strongly oblique angle This results in considerable variation of the incident angle over the image and a severe keystone distortion that can not be corrected by the optics of the projection system The actual image focus can be maintained by tilting the LCD in the appropriate Sheimpflug condition The keystone effect however must be corrected for in the layout of the LCD itself Thus for a given projection geometry the keystone is calculated and the segments on the LCD are pre distorted in order to obtain the correct projection geometry An added benefit is that since the LCD is being pre distorted additional distortions in the projection lens can be corrected for as well allowing for simplifications in the projection lens design This can be particularly significant what attempting to project at large angles from the optical axis Restricting the illumination LED to a single colour allows for monochromatic lens designs further simplifying the projection system The oblique projection and distorted LCD requires considerable modification to the illumination system as well in order to maintain a fairly uniform intensity in the projected image The physical segments on the LCD that are projected to the far side of the image can be several times smaller than those nearer to the projector Projector construction and results A

    Original URL path: http://www.lumio.com/our-core-technology/projection-and-display-options.html (2016-04-27)
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    Integrators Downloads FAQ s Contact Us Downloads Home Search Document Search a Document Search Keyword Select Category All Categories Downloads Public Software Firmware Hardware Documentation Downloads for Integrators Assembly Partners Ordering Newest first Oldest first Most popular Alphabetical Category Reverse Search by Any words All words Exact phrase Regular Expression Not Search where Name Description Please login to access this area User Name Password Remember Me Forgot your password Forgot

    Original URL path: http://www.lumio.com/index.php?option=com_docman&task=search_form&Itemid=252 (2016-04-27)
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