Abstract:
A lighting system comprises a light source having an exit window and an electrically controllable light processing arrangement, in the form of a grid of cells lying in a plane parallel to the exit window. Each cell has a cell wall formed as electrically switchable element which is switchable between at least two processing modes. The cell wall surrounds an opening, such that light emitted in a normal direction from the light source exit window is not processed, and light passing at an angle to the normal direction greater than a threshold angle is processed by the cell wall for color and/or intensity control.
Abstract:
The invention relates to a user interface (100) for use by a patient, e.g. a stroke victim, for controlling video and images displayed on a patient display (170). The user interface includes display components (111-113) for displaying images and video created from visual object data. The display components are selectable by the patient so that by selection of display component, images or video displayed on the display component will be displayed in full on the patient display. The user interface is configured so that the display components resemble corresponding display units (171-173) of the patient display. The display components and other buttons may have a size and may be centered in the user interface (100) to ease use of the user interface for patients having a reduced ability to operate buttons on a user interface.
Abstract:
A lighting system has a recessed panel (light source or window) and a side wall or a set of side walls around the recess. The side wall (or at least one of the side walls), is provided with a lighting arrangement for controlling the color of illumination and/or shape from which light is emitted from the side wall or side walls. This can be used to replicate the sharp lighting boundaries that arise on the recess walls from sun illumination through a skylight, or else they can be used to provide general illumination around a window.
Abstract:
An infrared beacon 100 is provided which may be used in a localization system. The infrared beacon comprises an infrared emitter 110 for emitting infrared light, a light sensor 120 for measuring the amount of ambient light outside the infrared beacon,and a controller 130 for regulating the infrared visibility of the infrared emitter from outside the infrared beacon in dependence upon the measured amount of ambient light. By changing the infrared visibility in dependence upon the ambient light, the beacon has a more constant infrared visibility. Thus more detailed localization, less dependent upon ambient light levels, is possible.