A detection device that detects an operation by a user on a display in midair, includes: a control unit that changes a positional relationship between a detection reference detecting the operation and the display, wherein: the control unit is capable of changing the positional relationship by user.

A scanned beam 3D sensing system includes smart infrared pulsing to detect objects in a field of view. Infrared laser light pulses are emitted at a first density in a field of view and reflections are detected. Times of flight of the infrared laser light pulses are measured to determine if an object is in the field of view. The density of the infrared pulses may be increased based on various factors. The higher density infrared pulses may be scanned in a region of interest that is a subset of the field of view. Power consumption is reduced by reducing the density of laser pulses when possible.

A scanning display system includes smart infrared pulsing to detect gestures and touch events with reduced power consumption. Infrared laser light pulses are emitted at a first density in a field of view and reflections are detected. Times of flight of the infrared laser light pulses are measured to determine if an object is in the field of view. The density of the infrared pulses may be increased based on various factors to detect gestures and touch events. Power consumption is reduced by reducing the density of laser pulses when possible.

A detection device that detects an operation by a user on a display in midair, includes: a control unit that changes a positional relationship between a detection reference detecting the operation and the display, wherein: the control unit is capable of changing the positional relationship by user.

Various approaches to touch sensing systems are disclosed As an example, a touch sensing system is disclosed that includes: an optical beam source to provide an optical beam; a pair of controllable beam deflectors comprising at least first and second beam deflectors, wherein the first beam deflector is configured to deflect the optical beam through a first angle towards a touch sensing region, and wherein the second beam deflector is configured to deflect scattered light from an object in the touch sensing region through a second angle; a detector, in particular a detector array; and an imaging system to image the deflected scattered light from the second beam deflector onto the detector array. The first and second beam deflectors are controlled in tandem to scan the touch sensing region.

Provided are an electronic device and an operation method thereof according to embodiments. The electronic device according to an embodiment includes an optical module configured to radiate light to an object and to detect a distance to the object from the electronic device by using light reflected from the object. The electronic device further includes a processor configured to determine touch information and/or gesture information of the object based on information about the detected distance to the object.

There is disclosed a technique for detecting the presence of a pointing device at an interactive surface, which interactive surface is provided with an illumination field for detecting a contact point.

An adjustment method for adjusting the direction of infrared light projected so that infrared light to pass over a displayed image from a projection device that is rotatable with orthogonal first and second axes as axes of rotation, the method including: arranging the projection device such that the plane containing the first axis and a line perpendicular to the upper edge or lower edge of the displayed image is orthogonal to the plane in which the displayed image is displayed; displaying a first image representing a first target on the line; and rotating the projection device with the second axis as the axis of rotation such that the irradiation position of the infrared light upon an indicator in the first image, in which is displayed a captured image, coincides with the position of the first target on the first image.

A position sensing device includes at least one light receiver, and a processor. The light receiver receives lights that are emitted from a plurality of light exit positions of a scanning light source component to scan a predetermined area and are reflected by a sensing object within the predetermined area. The processor controls the scanning light source component, and senses position of the sensing object based on a light reception signal of the light receiver. The processor further determines from which of the scanning lights the light reception signal is obtained, and senses the position of the sensing object based on optical paths of the scanning lights.

Disclosed herein are techniques for determining the position of a light beam on a beam shaping device. A feature can be formed on the beam shaping device to affect at least a portion of a light beam when the feature is illuminated by the light beam. When the light beam is directed onto the feature on the beam shaping device, a feature detection signal may be generated by a detector in response to detecting at least the portion of the light beam affected by the feature that has been illuminated by the light beam. The position of the light beam on the beam shaping device at a time instant can then be determined based, at least in part, on the feature detection signal.