Abstract: A radiation emitting element comprising a radiation transmissive element having a first refractive index, a first surface, a second, opposite surface, a radiation emitter adapted to emit radiation of a predetermined wavelength into the radiation transmissive element, and a plurality of radiation controlling elements, wherein each radiation controlling element comprises: a first liquid having a second refractive index, a second fluid having a third refractive index being lower than the second refractive index, the second refractive index being closer to the first refractive index than the third refractive index, means for altering a shape of the first liquid between two modes wherein: • in a first mode, the first liquid being in contact with the first surface at a first surface part, and an interface between the first liquid and the second fluid, at the first surface part, is not parallel to the first surface part and • in a second mode, a surface of the second fluid, at the first surface part, is at least sub

Abstract: A radiation emitting element comprising a radiation transmissive element having a first refractive index, a first surface, a second, opposite surface, a radiation emitter adapted to emit radiation of a predetermined wavelength into the radiation transmissive element, and a plurality of radiation controlling elements, wherein each radiation controlling element comprises: a first liquid having a second refractive index, a second fluid having a third refractive index being lower than the second refractive index, the second refractive index being closer to the first refractive index than the third refractive index, means for altering a shape of the first liquid between two modes wherein: in a first mode, the first liquid being in contact with the first surface at a first surface part, and an interface between the first liquid and the second fluid, at the first surface part, is not parallel to the first surface part and in a second mode, a surface of the second fluid, at the first surface part, is at least substan

Abstract: A radiation emitting element comprising a radiation transmissive element having a first refractive index, a first surface, a second, opposite surface, a radiation emitter adapted to emit radiation of a predetermined wavelength into the radiation transmissive element, and a plurality of radiation controlling elements, wherein each radiation controlling element comprises: a first liquid having a second refractive index, a second fluid having a third refractive index being lower than the second refractive index, the second refractive index being closer to the first refractive index than the third refractive index, means for altering a shape of the first liquid between two modes wherein: • in a first mode, the first liquid being in contact with the first surface at a first surface part, and an interface between the first liquid and the second fluid, at the first surface part, is not parallel to the first surface part and • in a second mode, a surface of the second fluid, at the first surface part, is at least sub

Abstract: An interactive display system that may be implemented to provide an electronic whiteboard that enables users to input information to the system by engaging a display with one or more objects. The system may present an image via the display that reflects the inputs received from the user. For example, the display may be dynamically updated to mimic inputs made to a whiteboard by the user via one or more pens and/or an eraser. The interactive display system may implement an underlayer embedded within the display to guide electromagnetic radiation that emanates from an object engaged with the display to one or more detectors by total internal reflection. Due at least in part to the efficiency of the underlayer in guiding the electromagnetic radiation to the detectors, the interactive display system may enhance the speed and/or accuracy of the interpretation of the inputs made by the user.

Abstract: A radiation emitting element comprising a radiation transmissive element having a first refractive index, a first surface, a second, opposite surface, a radiation emitter adapted to emit radiation of a predetermined wavelength into the radiation transmissive element, and a plurality of radiation controlling elements, wherein each radiation controlling element comprises: a first liquid having a second refractive index, a second fluid having a third refractive index being lower than the second refractive index, the second refractive index being closer to the first refractive index than the third refractive index, means for altering a shape of the first liquid between two modes wherein: in a first mode, the first liquid being in contact with the first surface at a first surface part, and an interface between the first liquid and the second fluid, at the first surface part, is not parallel to the first surface part and in a second mode, a surface of the second fluid, at the first surface part, is at least substan

Abstract: A radiation emitting element comprising a radiation transmissive element having a first refractive index, a first surface, a second, opposite surface, a radiation emitter adapted to emit radiation of a predetermined wavelength into the radiation transmissive element, and a plurality of radiation controlling elements, wherein each radiation controlling element comprises: —a first liquid having a second refractive index, —a second fluid having a third refractive index being lower than the second refractive index, the second refractive index being closer to the first refractive index than the third refractive index, —means for altering a shape of the first liquid between two modes wherein: • in a first mode, the first liquid being in contact with the first surface at a first surface part, and an interface between the first liquid and the second fluid, at the first surface part, is not parallel to the first surface part and • in a second mode, a surface of the second fluid, at the first surface part, is at least

Abstract: A system and a method of determining a position of a scattering/reflecting element on a surface of a radiation transmissive element adapted to transport scattered/reflected radiation toward one or more detectors. Radiation having different characteristics or properties is transmitted to different areas of the surface whereby the position of the touch may be determined from the radiation scattered/reflected.

Abstract: A radiation emitting element comprising a radiation transmissive element having a first refractive index, a first surface, a second, opposite surface, a radiation emitter adapted to emit radiation of a predetermined wavelength into the radiation transmissive element, and a plurality of radiation controlling elements, wherein each radiation controlling element comprises: a first liquid having a second refractive index, a second fluid having a third refractive index being lower than the second refractive index, the second refractive index being closer to the first refractive index than the third refractive index, means for altering a shape of the first liquid between two modes wherein: • in a first mode, the first liquid being in contact with the first surface at a first surface part, and an interface between the first liquid and the second fluid, at the first surface part, is not parallel to the first surface part and • in a second mode, a surface of the second fluid, at the first surface part, is at least sub

Abstract: Radiation guided by Total Internal Reflection inside a solid element from a point of engagement of a reflecting/emitting/scattering object and toward a detector reaches an area of the solid element on which the surface has areas preventing reflection of the radiation back into the element. This provides a spatial modulation of the radiation reaching the detector through one of the surfaces of the solid element. From this spatial modulation, the position of engagement may be determined.

Abstract: A system and a method of determining a position of a scattering/reflecting element on a surface of a radiation transmissive element adapted to transport scattered/reflected radiation toward one or more detectors. Radiation having different characteristics or properties is transmitted to different areas of the surface whereby the position of the touch may be determined from the radiation scattered/reflected.

Abstract: A method and system for determining the position of a radiation scattering/reflecting element, where the radiation emitter is provided at a surface of a radiation transmissive element an on which radiation is incident. This incident radiation is scattered/diffused/reflected by the scattering/reflecting element and guided by the transmissive element toward a detector able to determine the position of the element.

Abstract: A method and a system for determining the position of a radiation emitter, which radiation emitter may be an actively radiation emitting stylus, pen, pointer, or the like or may be a passive, radiation scattering/reflecting/diffusing element, such as a pen, pointer, or a finger of an operator. The radiation from the emitter is reflected from that position toward the detector by a reflecting element providing multiple intensity spots on the detector providing sufficient information for determining the position. From the output of the detector, the position of the radiation emitter is determined.

Abstract: A method and a system, such as a touch pad, for determining the position of a radiation emitter, which radiation emitter may be an actively radiation emitting stylus, pen, pointer, or the like or may be a passive, radiation scattering/reflecting/diffusing element, such as a pen, pointer, or a finger of an operator. The radiation is modulated by a bar code element and provided onto an at least one-dimensional detector. From the output of the detector, the position of the radiation emitter is determined. This system may be used as a standard touch pad or for determining the position of emitters external thereto, such as a marker used on a wall or black/white board or may be used with “internal” positions such as a touch pad.