A human machine interface with light sensing contact activation includes an operating panel and a display unit, where the operating panel includes at least one or more of a transparent or translucent substrate provided with at least one key area and at least one illumination source which can emit light into the substrate, and the display unit provides at least one information section at least temporarily displaying information on at least one function, which can be contact activated via the at least one key area of the operating panel. A rearview device and a motor vehicle may include such a human machine interface.

Implementations of a proximity detection device according to the present disclosure include a plurality of light emitting elements and a plurality of light receiving elements arranged in a lower portion of a touch panel display. The proximity detection device detects an object that is in proximity by reflected light received by the light receiving elements when irradiation light from the light emitting elements is reflected by the object. Implementations of a proximity detection device includes a drive circuit sequentially driving the plurality of light emitting elements, a measurement circuit measuring detection levels of the light receiving elements when the plurality of light emitting elements sequentially emit light, respectively, and a control unit having a function to estimate a position in the horizontal direction from a plurality of measurement results and correct the estimated position.

A projector includes: an illumination device casting one detection light and another detection light onto an operation surface; a first image pickup device having a higher sensitivity to the one detection light than to the another detection light; a second image pickup device different from the position of the first image pickup device, the second image pickup device having a higher sensitivity to the another detection light than to the one detection light; and a detection device detecting that an object is in contact with the operation surface when a position of a pointing unit specified based on a first picked-up image picked up using the first image pickup device and a position of the pointing unit specified based on a second picked-up image picked up using the second image pickup device are within a predetermined range.

A texture recognition device and a display device are provided. The texture recognition device includes a backlight element, configured to provide first backlight; a light constraint element, configured to perform a light divergence angle constraint process on the first backlight to obtain second backlight with a divergence angle within a preset angle range, the second backlight being transmitted to a detection object; and a photosensitive element, configured to detect the second backlight reflected by a texture of the detection object to recognize a texture image of the texture of the detection object.

A method for detecting fingerprints implemented in an electronic device includes detecting whether a display device is being pressed by at least one finger of a user according to signals of a pressure sensing device. If the display device is being pressed by the at least one finger of the user, controlling a fingerprint acquiring device to acquire fingerprint images of the at least one finger of the user and controlling a positioning device to acquire location information of the electronic device. The fingerprint images of the at least one finger of the user and the location information of the electronic device can be uploaded by the electronic device to a fingerprint database for fingerprint recognition.

A position detection method of detecting a position in an operation surface pointed by a pointing element, the method including irradiating with infrared light toward the operation surface, obtaining a first and second taken image calibrated with respect to the operation surface by imaging the operation surface with a first and second camera configured to take an image with the infrared light, forming a difference image between the first taken image and the second taken image, extracting an area in which an amount of disparity between the first taken image and the second taken image is within a predetermined range out of the difference image as a candidate area in which an image of the pointing element is included, detecting an area corresponding to a tip position of the pointing element from the candidate area extracted based on a shape of the pointing element, and outputting, based on the area corresponding to a tip position, information representing a pointing position of the pointing element in the operation surface and whether or not the pointing element had contact with the operation surface.

A position detection method of detecting a position in an operation surface pointed by a pointing element, the method including irradiating with infrared light toward the operation surface, obtaining a first and second taken image calibrated with respect to the operation surface by imaging the operation surface with a first and second camera configured to take an image with the infrared light, forming a difference image between the first taken image and the second taken image, extracting an area in which an amount of disparity between the first taken image and the second taken image is within a predetermined range out of the difference image as a candidate area in which an image of the pointing element is included, detecting an area corresponding to a tip position of the pointing element from the candidate area extracted based on a shape of the pointing element, and outputting, based on the area corresponding to a tip position, information representing a pointing position of the pointing element in the operation surface and whether or not the pointing element had contact with the operation surface.

Systems and methods are provided to enable users to interact with user terminals having a touch screen interface without requiring the user to physically contact a surface of the touch screen interface.

A touch display apparatus including a body, a display module, a light control element, and a touch module is provided. The body has an opening. The display module is disposed in the body and is suitable for emitting a plurality of image beams toward the opening. The light control element is disposed to overlap the opening of the body and is suitable for reflecting the image beams coming from the display module to an imaging space to display an image frame of the display module. The imaging space and the display module are located on two opposite sides of the light control element. The touch module is disposed on one side of the light control element and is configured to recognize a touch operation of a user in the imaging space.

A system for interacting with a screen without touching it, comprising a source of radiating energy directed into a predefined area, at least one directionally sensitive sensor that detects the radiation when it's reflected off of an object within the predefined area, and a processor that calculates position and motion information of the object and generates therefrom image information, which it sends to a screen where it is displayed.