Interface Technology (ChengDu) Co., Ltd.

An optical waveguide assembly includes: a waveguide comprising a first surface and a second surface opposite to the first surface; a coupling-in grating; a coupling-out grating spaced apart from the coupling-in grating, wherein the coupling-in grating and the coupling-out grating are on a same surface of the waveguide or on the first surface and the second surface of the waveguide, respectively; the waveguide is used to guide the image light toward the coupling-out grating, and the coupling-out grating is used to couple the image light out of the waveguide; and a first lens fixed to a side of the waveguide emitting the image light and used to refract the image light coupled out of the coupling grating, wherein an orthographic projection of the first lens on the waveguide covers an entirety of the coupling-out grating. A head-mounted display device is also provided.

An optical waveguide structure includes: a waveguide used to guide image light and including a first surface and a second surface opposite to the first surface; a coupling-out grating on the first surface and used to couple the image light out of the waveguide; and a first light modulation element on the second surface and on light paths of the image light and ambient light, the first light modulation element including a first light-transmitting surface including a first light modulation region and a second light modulation region connected to the first light modulation region, the first light modulation region being used to adjust a focus of the ambient light, and the second light modulation region being used to adjust a focus of the image light; wherein the first light modulation region and the second light modulation region have different curvatures. A near-eye display device is also provided.

Embodiments of the present disclosure relates to a composite material, a working stamp, and a preparation method thereof. The composite material includes a polymer matrix, a plurality of SMA nanoparticles, and a plurality of NTE material nanoparticles. The SMA nanoparticles are dispersed in the polymer matrix. The NTE material nanoparticles are dispersed in the polymer matrix. At a first temperature, the composite material is in a cured state and a thermal expansion coefficient of the composite material is zero (0) or near zero. When the composite material is cooled from the first temperature to a second temperature, the composite material spontaneously contracts caused by phase transformation of the SMA nanoparticles.

The present application is applicable to a field of optical detection technology, and provides a testing method for a near-eye display device and an electronic device. The method acquires first captured images of a test point displayed by the near-eye display device, according to a plurality of preset virtual image distances. According to a sharpness of each of the first captured images, the second captured image is determined from the first captured images. According to a preset virtual image distance corresponding to the second captured image, the standard position corresponding to the test point in the second captured image is determined. According to a measured position and the standard position corresponding to the test point in the second captured image, the detection result of the near-eye display device is determined. The above method can improve the detection efficiency and the detection accuracy of the near-eye display device.

A repoling driving device and a method thereof is disclosed. The repoling driving device, coupled to a piezoelectric element, includes a piezoelectric driver, a processor, and a current detector. The piezoelectric driver is coupled to the piezoelectric element. The processor is coupled to the piezoelectric driver. The processor drives the piezoelectric driver to generate a driving voltage. The piezoelectric element receives the driving voltage to generate an output current. The current detector is coupled to the piezoelectric element and the processor. The current detector receives the output current. When the output current is less than a given current, the current detector generates and transmits a repoling signal to the processor. The processor controls the piezoelectric driver to repolarize the piezoelectric element in response to the repoling signal.

A zoom optical system includes a first lens, a transreflective coating layer, a liquid crystal layer, a substrate, a polarizing reflector film layer and a second lens. The first lens has a first surface and an opposite second surface. The transreflective coating layer adheres to the first surface of the first lens. The liquid crystal layer adheres to the second surface of the first lens. The substrate adheres to a surface facing away the first lens of the liquid crystal layer. The polarizing reflector film layer is located at a side of the substrate facing away the liquid crystal layer. The second lens adheres to the polarizing reflector film layer by an optical adhesive layer.

A transparent display includes a transparent driving board, a plurality of light-emitting elements, and a transparent encapsulation layer. The light-emitting elements are arranged on the transparent driver board. The transparent encapsulation layer covers the light-emitting elements. The transparent encapsulation layer has a micro lens array structure on the surface above the light-emitting elements. The micro lenses of the micro lens array structure hardly cover the light-transmitting area of the transparent display. Thus, the transparent display has high transparency and high brightness.

A touch display panel includes an embedded touch liquid crystal display (LCD) module, a polarizer, and a cover plate. The embedded touch LCD module includes a non-filter window. The polarizer is disposed over the embedded touch LCD module and has a non-polarized window, a first vertical projection of the non-polarized window overlaps with a second vertical projection of the non-filter window, and the non-polarized window is filled with an optical clear material. The cover plate overlays the polarizer, and the optical clear material in the non-polarized window contacts the cover plate. The disclosure also provides a method for manufacturing the touch display panel and a display device including the touch display panel.

An ink coating method is disclosed which can be applied to a plurality of microstructures of an optical element. The microstructures respectively have a plurality of light shielding surfaces located on the same side of the microstructures and the light shielding surfaces are separated from one another. This ink coating method includes: providing a transfer head, in which the transfer head includes a plurality of transfer structures, and the transfer structures respectively include transfer surfaces located on the same side of the transfer structures and the transfer surfaces are separated from one another; applying ink to the transfer surfaces; and using the transfer head to imprint the optical element, such that the ink on the transfer surfaces is coated onto the light shielding surfaces.

An augmented reality display device includes a light source, a waveguide module and a solar charging layer. The light source has a light-emitting area. The waveguide module is located on the light-emitting area of the light source and includes a first glass layer, a waveguide element, an electrochrome layer and a second glass layer. The first glass layer is located on the light-emitting area of the light source. The electrochrome layer is located on a surface of the waveguide element facing away the first glass layer. The second glass layer is located a surface of the electrochrome layer facing away the waveguide element. The solar charging layer is located on a surface of the second glass layer facing away the electrochrome layer, in which the solar charging layer electrically connects the light source and is configured to charge the light source.