Abstract: A method for designing a diffractive optical element comprises: determining parameters of a light source and a target light field of a diffractive optical element; according to the parameters of the light source, determining the distribution of a plurality of first microstructure units on the diffractive optical element; dividing the target light field into a plurality of target maps superimposed to form the target light field, the first microstructure units corresponding to the target maps; performing distortion pre-correction on the plurality of target maps separately; and according to the plurality of corrected target maps and the parameters of the light source, designing corresponding phase distributions of the plurality of first microstructure units separately. A VCSEL partitioned light source may be combined with a diffractive optical element to project a uniform light field. The diffractive optical element is applied to a partitioned illumination system, which provides a uniform illumination.

Abstract: An optical waveguide device and a display device are provided. The optical waveguide device includes a waveguide substrate having a coupling-out region and first and second surfaces with coupling-in and reflection regions, a coupling-in grating disposed in the coupling-in region to diffract input light to form positive first-order and zero-order diffraction light, a coupling-out grating disposed and a reflection grating disposed in the reflection region such that portion of the zero-order diffraction light forms positive first-order reflection light through diffraction. A light spot of the zero-order diffraction light first projected onto the second surface has a first profile at least partially located in the reflection region. A projection of the reflection region on the first surface partially overlaps with the coupling-in region, and a ratio of area of an overlapping portion to that of the coupling-in region is less than or equal to 40%.

Abstract: A method for designing a diffractive optical element comprises: determining parameters of a light source and a target light field of a diffractive optical element; according to the parameters of the light source, determining the distribution of a plurality of first microstructure units on the diffractive optical element; dividing the target light field into a plurality of target maps superimposed to form the target light field, the first microstructure units corresponding to the target maps; performing distortion pre-correction on the plurality of target maps separately; and according to the plurality of corrected target maps and the parameters of the light source, designing corresponding phase distributions of the plurality of first microstructure units separately. A VCSEL partitioned light source may be combined with a diffractive optical element to project a uniform light field. The diffractive optical element is applied to a partitioned illumination system, which provides a uniform illumination.

Abstract: A sensing device includes a sensing module configured to obtain a measurement data of an object to be measured, a first processing module coupled to the sensing module and configured to receive the measurement data of the object to be measured from the sensing module, and a power module coupled to the sensing module and the first processing module. The power module is configured to produce a supply voltage based on a magnetic field generated by an electromagnetic device to power the sensing module and the first processing module.

Abstract: A diffractive optical waveguide and a display device for optical pupil expansion are provided. The diffractive optical waveguide comprises a waveguide substrate; a coupling-in grating; and a coupling-out grating comprising first, second, and third coupling-out gratings that are arranged successively in a first direction. The second coupling-out grating is corresponding to a region that includes a first edge and a second edge spaced in a second direction orthogonal to the first direction. The second direction is orthogonal to the first direction. The first edge is closer to the coupling-in grating than the second edge. A first width of the first edge in the first direction is greater than a second width of the second edge in the first direction. The light output by the coupling-in grating is incident on the second coupling-out grating through the waveguide substrate, and is diffracted by the second coupling-out grating into a plurality of beam splits.

Abstract: A diffractive optical waveguide and a display device for optical pupil expansion are provided. The diffractive optical waveguide comprises a waveguide substrate; a coupling-in grating; and a coupling-out grating comprising first, second, and third coupling-out gratings that are arranged successively in a first direction. The second coupling-out grating is corresponding to a region that includes a first edge and a second edge spaced in a second direction orthogonal to the first direction. The second direction is orthogonal to the first direction. The first edge is closer to the coupling-in grating than the second edge. A first width of the first edge in the first direction is greater than a second width of the second edge in the first direction. The light output by the coupling-in grating is incident on the second coupling-out grating through the waveguide substrate, and is diffracted by the second coupling-out grating into a plurality of beam splits.

Abstract: The present application provides a diffractive optical waveguide for optical pupil expansion and a display device. The diffractive optical waveguide comprises a waveguide substrate having a coupling-in region and a coupling-out region that includes a first coupling-out region, a second coupling-out region, and a transitional region; a coupling-in grating; and a coupling-out grating. The coupling-out grating comprises first and second coupling-out gratings and a plurality of transitional coupling-out grating. The first and second coupling-out gratings are arranged in a first direction. The transitional region comprises a plurality of sub-regions each correspondingly provided with one of transitional coupling-out gratings. The transitional coupling-out grating has a first, a second, and a third vector direction. The third vector direction is parallel to the vector direction of the first coupling-out grating.

Abstract: A touch detection device includes a touch panel, a piezoelectric sensor mounted on the touch panel for detecting a tap event applied to the touch panel, and a control circuit board in electrical communication with the piezoelectric sensor. The control circuit board includes a signal processing circuit for processing a detection signal output from the piezoelectric sensor, and a controller for determining whether the tap event is a correct human finger tap event based on the processed detection signal.

Abstract: An antenna includes a substrate, a first circular metal strip disposed on a first surface of the substrate, and a second circular metal strip disposed on a second surface of the substrate. The first circular metal strip has a first end used as a feed end and a second end connected to a first end of a radio frequency resistor. The second circular metal strip has a first end used as a grounding terminal and a second end connected to a second end of the radio frequency resistor.

Abstract: A diffractive optical element (10) comprises a microstructure plane provided thereon with at least one microstructural pattern unit. The diffractive optical element (10) can receive a light beam emitted from a partitioned light source array (20) and project a light field on a target surface (OB), wherein the partitioned light source array (20) comprises a plurality of light source arrays (20-1, 20-2, ..., 20-n) spaced along a first direction, and the microstructural pattern unit is configured to be capable of diverging and light homogenization-modulating a light beam emitted from a light source in the plurality of light source arrays (20-1, 20-2, ..., 20-n) along the first direction such that light field regions projected by adjacent light source arrays (20-1, 20-2, ..., 20-n) on the target surface are adjoined or overlapped with each other in the first direction. In the embodiments of the invention, there are gaps between adjacent partitions. The light source partitions are lightened in turn.

Abstract: A wireless powering device comprising a first coil assembly including a first coil and a second coil assembly including a second coil. The second coil is adapted to be electromagnetically coupled with the first coil. One of the first coil and the second coil is used as a transmitting coil and another of the first coil and the second coil is used as a receiving coil. The second coil is movable with respect to the first coil in a direction perpendicular to a direction of magnetic lines generated by the transmitting coil.

Abstract: An antenna includes a cylindrical substrate, an arc-shaped outer metal strip formed on an outer surface of the cylindrical substrate, and an arc-shaped inner metal strip formed on an inner surface of the cylindrical substrate. A cross section of the cylindrical substrate forms a complete circle with a center angle equal to 360 degrees or forms an arc with a center angle less than 360 degrees. The cylindrical substrate, the arc-shaped outer metal strip, and the arc-shaped inner metal strip have a common central axis.

Abstract: A wireless power transmission device is disclosed. The wireless power transmission device comprises a first coil and a second coil electromagnetically coupled to the first coil without contacting the first coil. A portion of one of the first coil and the second coil extends through a space defined by the other of the first coil and the second coil.

Abstract: A touch detection device includes a touch panel, a piezoelectric sensor mounted on the touch panel for detecting a tap event applied to the touch panel, and a control circuit board in electrical communication with the piezoelectric sensor. The control circuit board includes a signal processing circuit for processing a detection signal output from the piezoelectric sensor, and a controller for determining whether the tap event is a correct human finger tap event based on the processed detection signal.

Abstract: A wireless power supply device comprises a transmitting coil assembly and a receiving coil assembly. The transmitting coil assembly includes a first ferrite core having a receiving chamber with an opening and a transmitting coil disposed in the receiving chamber of the first ferrite core. The receiving coil assembly is adapted to be moved into the receiving chamber through the opening of the receiving chamber and located at a predetermined position in the receiving chamber. The receiving coil assembly is electromagnetically coupled with the transmitting coil assembly.

Abstract: An electrified door or window system having a frame with a power transmitting device and a door or window having a power receiving device. The power receiving device is electrically connected to the power transmitting device in the frame of the door or window. At least one powered device is integrated in the door or window. At least one electrically conductive pathway extends from the power receiving device to the at least one powered device. A controller is provided to control the flow of power from the power receiving device to the at least one electrically conductive pathway.

Abstract: A wireless power supply device comprising a plurality of transmitting coil assemblies mounted at a plurality of different positions of an electrical equipment, a plurality of control switches disposed at the plurality of different positions and configured to switch on and off the transmitting coil assemblies, and a single receiving coil assembly mounted on a carrier of the electrical equipment. The transmitting coil assembly mounted at one position of the plurality of different positions is disconnected by switching off the control switch provided at the one position before the carrier is mounted at one position, and is connected by switching on the control switch provided at the one position after the carrier is mounted at the one position, such that the single receiving coil assembly is electromagnetically coupled with the transmitting coil assembly at the one position.

Abstract: A wireless power transmission device comprises a transmitting coil assembly and a receiving coil assembly. The transmitting coil assembly includes a first magnetic core and a transmitting coil winding. The first magnetic core has a substantial U-shaped body portion, a first pillar portion disposed at a first end of the U-shaped body portion, and a second pillar portion disposed at a second end of the U-shaped body portion. The transmitting coil winding has a first transmitting coil winding wound around the first pillar portion and a second transmitting coil winding wound around the second pillar portion. The receiving coil assembly is interposed between the first pillar portion and the second pillar portion and electromagnetically coupled therewith. The receiving coil assembly includes a second magnetic core and a receiving coil winding.

Abstract: A sensing device includes a sensing module configured to obtain a measurement data of an object to be measured, a first processing module coupled to the sensing module and configured to receive the measurement data of the object to be measured from the sensing module, and a power module coupled to the sensing module and the first processing module. The power module is configured to produce a supply voltage based on a magnetic field generated by an electromagnetic device to power the sensing module and the first processing module.

Abstract: An antenna includes a cylindrical substrate, an arc-shaped outer metal strip formed on an outer surface of the cylindrical substrate, and an arc-shaped inner metal strip formed on an inner surface of the cylindrical substrate. A cross section of the cylindrical substrate forms a complete circle with a center angle equal to 360 degrees or forms an arc with a center angle less than 360 degrees. The cylindrical substrate, the arc-shaped outer metal strip, and the arc-shaped inner metal strip have a common central axis.