A foldable frame assembly is adapted for an optical touch device. The foldable frame assembly includes a first frame, a second frame and a third frame. The second frame is pivotally connected to a first end of the first frame and the third frame is pivotally connected to a second end of the first frame, wherein the first end is opposite to the second end. The second frame and the third frame can rotate with respect to the first frame so as to be folded or expanded with respect to the first frame.

A foldable frame assembly is adapted for an optical touch device. The foldable frame assembly includes a first frame, a second frame and a third frame. The second frame is pivotally connected to a first end of the first frame and the third frame is pivotally connected to a second end of the first frame, wherein the first end is opposite to the second end. The second frame and the third frame can rotate with respect to the first frame so as to be folded or expanded with respect to the first frame.

A method for controlling triggering of a human-computer interaction operation and an apparatus are provided according to the embodiments of the disclosure. The method includes: acquiring images shot by a shooting device, and displaying the acquired images on a display screen in a blurring manner; detecting a difference between acquired images in each frame, recognizing a designated outline on the image according to the difference between acquired images in each frame, and calculating a location of the recognized designated outline on the display screen; and determining, in real time, whether the designated outline at the location on the display screen intersects with a designated area displayed on the display screen, and triggering an operation corresponding to the designated area if the designated outline at the location on the display screen intersects with the designated area displayed on the display screen.

A touch-sensing display panel, comprising an LCD unit including a backlight and a plurality of image-forming pixel elements arranged in a central region. A planar light guide with a first refractive index has a front surface forming a touch-sensing region and an opposite rear surface facing the LCD unit. A plurality of light emitters are emulated by passing light from the backlight through pixel elements of first selected portions of a peripheral region of the LCD unit into the light guide for propagation therein through total internal reflection, and a plurality of light detectors are connected to receive light from the light guide.

A touch-sensing display panel, comprising an LCD unit including a backlight and a plurality of image-forming pixel elements arranged in a central region. A planar light guide with a first refractive index has a front surface forming a touch-sensing region and an opposite rear surface facing the LCD unit. A plurality of light emitters are emulated by passing light from the backlight through pixel elements of first selected portions of a peripheral region of the LCD unit into the light guide for propagation therein through total internal reflection, and a plurality of light detectors are connected to receive light from the light guide.

Methods are disclosed for dynamic assignment of possible channels in a touch sensitive device having rows and columns. In an embodiment, a method determines a first signal space in which to generate signals for use in the touch sensor. Signals are then generated in the first signal space on separate ones of the rows and a column signal is sensed on a column. The first signal space is replaced with a second signal space, and a second plurality of signals is generated for use in the touch sensor in the second frequency space. The second plurality of signals is sensed to identify a touch event in the touch sensitive device.

The present disclosure relates to a touch panel. The touch panel includes a substrate; one or more infrared light-emitting devices; an infrared total reflection coverplate that is deformable in response to a touch of a touching object; an infrared sensing layer including at least one sensing wire in a first direction and at least one sensing wire in a second direction. The sensing wires in the first direction and the sensing wires in the second direction are insulated from each other and are made of photoconductive material sensitive to the infrared light emitted from the infrared light-emitting device.

Provided is an image-display apparatus on which an object to be observed can be applied, the image-display apparatus comprising: a display screen; a plurality of light-emitting units arranged to emit light out of the screen from behind the screen; a plurality of light sensors arranged behind the screen to detect light including light emitted from at least one light-emitting unit and reflected from an object applied to the display screen, and to output at least first and second detection values; and a determination unit configured to determine, based on the detection values output by the plurality of sensors, a first region of the display screen corresponding to a region to which the object is applied to the display screen.

An infrared touch screen, a touch detection method thereof and a display apparatus are provided. The infrared touch screen comprises: a display device, an infrared emitter and a first infrared receiver arranged at any side of a display surface of the display device, the infrared emitter emitting a plurality of infrared rays scattered and covering a light exiting surface of the display device; and a plurality of second infrared receivers arranged at intervals on other sides the display surface of the display device except the side provided with the infrared emitter and corresponding to the plurality of infrared rays in a one-to-one correspondence relationship, wherein, the first infrared receiver detects an infrared ray reflected by a touch position, in the infrared rays emitted by the infrared emitter.

An infrared touch screen, a touch detection method thereof and a display apparatus are provided. The infrared touch screen comprises: a display device, an infrared emitter and a first infrared receiver arranged at any side of a display surface of the display device, the infrared emitter emitting a plurality of infrared rays scattered and covering a light exiting surface of the display device; and a plurality of second infrared receivers arranged at intervals on other sides the display surface of the display device except the side provided with the infrared emitter and corresponding to the plurality of infrared rays in a one-to-one correspondence relationship, wherein, the first infrared receiver detects an infrared ray reflected by a touch position, in the infrared rays emitted by the infrared emitter.