Abstract: A rear illuminated light guide for an LCD screen with in-coupling gratings to receive backlight from an input surface and to spread received backlight laterally within the light guide. Out-coupling gratings receive laterally spread backlight and output at least some of the received laterally spread backlight through an output surface that is opposite to the input surface and towards the LCD screen. The input and output gratings have lateral offset.

Abstract: According to an example embodiment of the present invention, there is provided an apparatus comprising a memory configured to store information relating to a representation of information on a touch display, a first interface, toward the touch display, configured to receive indications of touch interactions from the touch display, and at least one processing core configured to modify contents of the representation based at least in part on signals received from a second interface comprised in the apparatus.

Abstract: A method and an apparatus comprising operating a processor of an apparatus as a first processor and/or as a second processor. The method at a first processor comprises recognizing the proximity of a second apparatus; recognizing a first user input and in response to the user input, sending an application share invitation to the second apparatus. The method at a second processor comprises recognizing the proximity of a first apparatus and in response to receiving an application share invitation from the first apparatus, displaying a security prompt for the user on the display.

Abstract: A touch display has a touch screen to display images and one or more infrared cameras to take images of objects contacting the touch screen. One or more calibration patterns are formed on the touch screen. In response, an automatic process takes place, with: producing an image of the touch screen by taking with each one of the group of infrared cameras a set of one or more images of the calibration patterns; determining geometric distortions of the images with relation to the formed one or more calibration patterns; and calculating calibration parameters configured to enable computational compensation of the determined geometric distortions. The calibration parameters are then stored.

Abstract: A light guide assembly (2) for use in a touch sensitive area (3) of an optical touch sensing device (1) for touch screens is configured to receive light, to allow the light thereby received to propagate in the light guide assembly, and to deliver the light thereby propagated in the light guide assembly further out of the light guide assembly. The light guide assembly comprises a plurality of light guide stripes (4, 4? 5) for controlling the light propagation, and an interaction arrangement (27; 17; 21) configured to define at least one restricted interaction area (11) within the touch sensitive area for interaction between the light and the external object. The optical touch sensing device is configured to detect the presence of an external object (10) on the basis of changes in the light delivered further out of the light guide assembly due to interaction of the light with the external object.

Abstract: A light guide assembly (2) for use in a touch sensitive area (3) of an optical touch sensing device (1) for touch screens is configured to receive light, to allow the light thereby received to propagate in the light guide assembly, and to deliver the light thereby propagated in the light guide assembly further out of the light guide assembly. The light guide assembly comprises a plurality of light guide stripes (4, 5) for controlling the propagation of light. The optical touch sensing device is configured to detect the presence of an external object (10) on the basis of changes in the light delivered further out of the light guide assembly due to interaction of the light with the external object.

Abstract: A method, apparatus and computer program for forming graphics in a drawing area based on user instructions. In response to addition or changing of a first graphical object, an interaction zone is formed around the first graphical object for a given continuation period. It is detected if a second graphical object is drawn starting from the interaction zone during the continuation period and if yes, the first graphical object is changed by merging the second graphical object with the first graphical object.

Abstract: A method and an apparatus comprising operating a processor of an apparatus as a first processor and/or as a second processor. The method at a first processor comprises recognizing the proximity of a second apparatus; recognizing a first user input and in response to the user input, sending an application share invitation to the second apparatus. The method at a second processor comprises recognizing the proximity of a first apparatus and in response to receiving an application share invitation from the first apparatus, displaying a security prompt for the user on the display.

Abstract: An apparatus comprising a display and a processor configured to cause displaying a first set of display objects and a second set of display objects in such a way that user input activating a display object of the first set of display objects causes the second set of display objects to be revealed on the display. The second set of display objects is revealed in a direction corresponding to the user input and in synchronization with the user input.

Abstract: A rear illuminated light guide for an LCD screen with in-coupling gratings to receive backlight from an input surface and to spread received backlight laterally within the light guide. Out-coupling gratings receive laterally spread backlight and output at least some of the received laterally spread backlight through an output surface that is opposite to the input surface and towards the LCD screen. The input and output gratings have lateral offset.

Abstract: An interactive display device (100) has an image layer (102) for presenting user perceivable visual content and a touching surface (101) covering the image layer (102) or formed by the image layer (102). Further, there are a plurality of invisible light sources (110) for illuminating alternatingly different sub-regions of the touching surface (101) and a plurality of touch detection units (107) for capturing images of illuminated sub-regions from behind the image layer (102). From the captured images contact areas are detected where a pointing object (112) contacts the touching surface (101) and thus causes correspondingly one or more marks in the captured images. The remaining ones of the invisible light sources (110) are controlled to be operable while adjacent touch detection units and associated invisible light sources are controlled to be non-operable so as to reduce undesired reflections of invisible light from non-contacting objects in the vicinity of the touching surface.

Abstract: A method, apparatus and computer program for forming graphics in a drawing area based on user instructions. In response to addition or changing of a first graphical object, an interaction zone is formed around the first graphical object for a given continuation period. It is detected if a second graphical object is drawn starting from the interaction zone during the continuation period and if yes, the first graphical object is changed by merging the second graphical object with the first graphical object.

Abstract: A touch display has a touch screen to display images and one or more infrared cameras to take images of objects contacting the touch screen. One or more calibration patterns are formed on the touch screen. In response, an automatic process takes place, with: producing an image of the touch screen by taking with each one of the group of infrared cameras a set of one or more images of the calibration patterns; determining geometric distortions of the images with relation to the formed one or more calibration patterns; and calculating calibration parameters configured to enable computational compensation of the determined geometric distortions. The calibration parameters are then stored.

Abstract: An interactive display device (100) presents to a user (113) a visible image on an image layer (102) through a touching surface (101). The display device (100) has an illumination unit (107) that transmits infrared light and captures through the touching surface sets of infrared images of objects that are in the proximity of the touching surface. The display device (100) detects from the infrared images contact areas where a pointing object (112) is located with respect to the image layer (102) and casts in the infrared image a corresponding shadow. The illumination unit (107) alternates the infrared illumination so that each infrared image set has images taken with differing infrared illumination. Resulting variance in the shadows is used by the interactive display device (100) to detect whether the pointing object (112) contacts the touching surface (101) or not.

Abstract: An interactive display device (100) has an image layer (102) for presenting user perceivable visual content and a touching surface (101) covering the image layer (102) or formed by the image layer (102). Further, there are a plurality of invisible light sources (110) for illuminating alternatingly different sub-regions of the touching surface (101) and a plurality of touch detection units (107) for capturing images of illuminated sub-regions from behind the image layer (102). From the captured images contact areas are detected where a pointing object (112) contacts the touching surface (101) and thus causes correspondingly one or more marks in the captured images. The remaining ones of the invisible light sources (110) are controlled to be operable while adjacent touch detection units and associated invisible light sources are controlled to be non-operable so as to reduce undesired reflections of invisible light from non-contacting objects in the vicinity of the touching surface.

Abstract: An interactive display device (100) presents to a user (113) a visible image on an image layer (102) through a touching surface (101). The display device (100) has an illumination unit (107) that transmits infrared light and captures through the touching surface sets of infrared images of objects that are in the proximity of the touching surface. The display device (100) detects from the infrared images contact areas where a pointing object (112) is located with respect to the image layer (102) and casts in the infrared image a corresponding shadow. The illumination unit (107) alternates the infrared illumination so that each infrared image set has images taken with differing infrared illumination. Resulting variance in the shadows is used by the interactive display device (100) to detect whether the pointing object (112) contacts the touching surface (101) or not.

Abstract: Method or orienting items on the display to a user are based on the direction of the user hand, or the user are disclosed. The method relies on detection of the direction of the users' hand and orienting the item at a selected orientation thereto.

Abstract: An interactive display (100) device with optical recognition (107, 111) of touching of display surface (101) in which an image is formed on a display (102) at which pointing can be made by a finger or other objects (112). Pointing objects (112) are detected by a machine view arrangement (107, 111) behind the display surface (101) within a casing (104) of the interactive display (100). Inside the casing (100), there is an infrared light reflection inhibitor (109) configured to substantially reduce the amount of infrared light that can reflect back and forth within the casing (104) to an extent that the optical recognition is excessively interfered. The infrared light reflection inhibitor (109) contains one or more refractive and/or reflective elements to redirect incoming infrared light such that the amount of residual light that can interfere the optical recognition is sufficiently reduced to allow the optical recognition even in bright daylight.