An imaging optical system includes an imaging device and an optical waveguide. The waveguide includes structures configured to couple light from an external environment into the waveguide. The structures direct the light to propagate in the waveguide via total internal reflection and towards the imaging device.

An imaging optical system includes an imaging device and an optical waveguide. The waveguide includes structures configured to couple light from an external environment into the waveguide. The structures direct the light to propagate in the waveguide via total internal reflection and towards the imaging device.

Optical touch sensors may be adversely affected by noise, such as modulated sunlight incident on the touch sensor. An analog optical detector is provided that includes a frequency dependent emitter feedback circuitry that does not substantially reduce the gain for a first modulation frequency range of the photodiode current and provides, for a second modulation frequency range of the photodiode current, a current feedback to reduce the gain of the first transistor. The second modulation frequency may include one or more expected noise modulation frequencies. A touch sensor device including a plurality of such optical detectors is also provided. Also provided is a touch sensor device comprising sampling disable circuitry operable to disable sampling of the output from the optical detectors for a duration of time.

A method for touch detection and fingerprint unlocking includes detecting a finger of a user being in contact with a multiresolution touch interface having a low-resolution mode and a high-resolution mode. The method also includes in response to the detecting the finger of the user being in contact with the multiresolution touch interface, determining a touch interaction associated with the detected finger under the low-resolution mode. The method also includes in response to the multiresolution touch interface being locked, switching a finger contact area of the multiresolution touch interface into the high-resolution mode, wherein the finger contact area is determined based at least in part on the determined touch interaction associated with the detected finger. The method also includes detecting a fingerprint in the finger contact area, and unlocking the multiresolution touch interface based at least in part on the detected fingerprint.

A method of operating an input device can include generating a light beam by a light source module, steering the light beam towards a target location on an underlying surface, steering a reflected light beam towards an image sensor of the input device, receiving the reflected light beam by the image sensor, and generating tracking data by the image sensor that corresponds to a two-dimensional (2D) movement of the input device on the underlying surface. The method further includes determining that the input device is operating: on and in contact with the underlying surface when the reflected light beam received by the image sensor is located on a first set of pixels of the image sensor, and above and not in contact with the underlying surface when the reflected light beam is located on a second set of pixels of the plurality of pixels of the image sensor.

A frameless touchscreen display system comprises a frameless display screen; a display system arranged to render a moving image within a display area of the frameless display screen; an image rendering component configured to receive a detected touch input, determine an action associated with a location of the detected touch input within the display area, and modify the moving image to effect the associated touch action; a 2D lidar sensor positioned so that a detection plane of the 2D lidar sensor lies adjacent and substantially parallel to the frameless display screen; and a touch input detector coupled to the 2D lidar sensor and configured to: detect the touch input based on one or more object lidar returns from an object intersecting the detection plane at said location within the display area, and estimate said location within the display area based on (i) a return time and return angle of each object lidar return and (ii) a known position of the 2D lidar sensor relative to the frameless display screen.

The present disclosure relates to the field of visual images. A stereoscopic display screen includes: an optical component, configured to provide an optical signal of which the light intensity is lower than the light intensity of video information; a transparent display component, configured to display the video information; and a space imaging frame component, configured to form a hollow enclosed cavity which is visible from the front and has a rear end sealed by the transparent display component. A foreground stage imaging area is formed in an internal region of the space imaging frame component, the space imaging frame component forms, at a position opposite the optical component, a virtual space imaging frame component which takes an axial plane of the transparent display component as a mirror symmetrical plane, and a virtual background stage imaging area is formed in the virtual space imaging frame component.

To achieve multifunctionality, a large number of components and the time and effort for implementing the components are required, which leads to an increase in the manufacturing cost and a reduction in yield. A matrix display portion and a matrix optical sensor portion are formed over one substrate. In addition, a driver circuit of the display portion and a driver circuit of the optical sensor portion formed over the same substrate as that for the display portion are built in one chip, whereby the number of components can be reduced. When the optical sensor is formed in a display panel, a barcode reader function or a scanner function can be given to the display panel. Furthermore, a function of authenticating fingerprints or the like or an input/output function of a touch sensor can be given to the display panel.

A spatial image display touch device includes an imaging element, a display, an optical film and a sensor unit. The imaging element and the display are retained in a housing and inclined to each other. The display generates an image light passing through the imaging element to form a spatial image. The optical film, composed of a plurality of micro-grids arranged in a matrix, is attached on the display. The sensor unit is mounted in the housing to detect an object appearing at the position wherein the spatial image is displayed. By arranging the optical film in front of the display, only the spatial image is visible and the problem of ghost images is avoided.

A method for manufacturing a photoelectric conversion element according to an aspect includes an active layer forming step of forming an active layer having a repeating unit represented by Chemical Formula 1. The active layer forming step includes: a first layer forming step of forming a first layer by applying polyamic acid serving as a precursor; a first heating step of heating the first layer at 120° C. for 20 minutes to 60 minutes; and a second heating step of heating the first layer at 230° C. to 280° C. for 10 minutes.