Abstract: A projection curtain is provided in the present invention. The projection curtain at least comprises a reflective layer and one of a colored layer, a diffusion layer, and a Fresnel lens layer. The Fresnel lens layer is a spherical Fresnel lens layer or an aspherical Fresnel lens layer. The Fresnel lens layer comprises a plurality of annular protrusions protruding from a plane, the plurality of annular protrusions are arranged in circular bands. A cross-sectional shape of each annular protrusion along a cross section perpendicular to the plane is a triangular shape or a multi-step shape or a free surface shape. The width of one side of each cross-sectional shape parallel to the plane gradually changes, and gradual change of the cross-sectional shape and the width thereof determines light gathering characteristics of the spherical Fresnel lens layer or the aspherical Fresnel lens layer. A surface of each annular protrusion has scattered microstructures.

Abstract: A preparation method (100) for a three-dimensional micro-nano morphological structure manufactured by a laser direct writing lithography machine, comprising: step 110, providing a three-dimensional model diagram; step 120, dividing the three-dimensional model diagram in a height direction to obtain at least one height interval; and step 130, projecting the three-dimensional model diagram onto a plane to obtain a mapping relationship, wherein the mapping relationship comprises coordinates, on the plane, corresponding to each point on the three-dimensional model diagram, and wherein the height of each point on the three-dimensional model diagram corresponds to a height value in a corresponding height interval; and making the mapping relationship correspond to an exposure dose according to the mapping relationship, and performing lithography on the basis of the exposure dose. Any three-dimensional micro-nano morphological structure can be obtained.

Abstract: A solar cell superfine electrode transfer thin film is described. The electrode transfer thin film sequentially includes from bottom to top a substrate, a release layer, a resin layer and a hot melt adhesive layer; the resin layer is formed with electrode trenches therein; the electrode trenches are formed with electrodes therein; superfine conductive electrodes are continuously prepared on a transparent thin film via a roll-to-roll nanoimprinting method, the width of an electrode wire being 2 ?m-50 ?m, and the width of a typical line being 10 ?m-30 ?m. Directly attach the superfine electrodes of the hot melt adhesive layer to a solar cell by peeling off the substrate material, and sintering at a high temperature to volatilize the hot melt adhesive layer material while retaining the electrodes, thus the electrodes are integrally transferred, without poor local transfer.

Abstract: Provided are a solar cell superfine electrode transfer thin film, manufacturing method and application method thereof. The electrode transfer thin film sequentially includes from bottom to top a substrate, a release layer, a resin layer and a hot melt adhesive layer; the resin layer is formed with electrode trenches therein; the electrode trenches are formed with electrodes therein; superfine conductive electrodes are continuously prepared on a transparent thin film via a roll-to-roll nanoimprinting method, the width of an electrode wire being 2 ?m-50 ?m, and the width of a typical line being 10 ?m-30 ?m. Directly attach the superfine electrodes of the hot melt adhesive layer to a solar cell by peeling off the substrate material, and sintering at a high temperature to volatilize the hot melt adhesive layer material while retaining the electrodes, thus the electrodes are integrally transferred, without poor local transfer.

Abstract: A naked eye 3D display device is provided. The naked eye 3D display device includes a directional projection screen, a laser light source, a red monochromatic laser light source, a green monochromatic laser light source and a blue monochromatic laser light source. Lights emitted by the three monochromatic laser light sources emit incident light on the directional projection screen with nano-grating pixels at specific angles and specific positions, and the same emergent light fields are formed. The laser light source provides multi-perspective image pixels. The multi-perspective image pixels match a nano-grating pixel array on the directional projection screen. By a direct spatial modulation for the laser projection light, colorful 3D display is achieved. There is no crosstalk between various viewpoints. The naked eye 3D display device has no visual fatigue and has a low cost.

Abstract: A multi-view pixel directional backlight module and a naked-eye 3D display device are provided. The multi-view pixel directional backlight module includes at least two rectangular light guide plates closely stacked together. A light-emerging surface of the rectangular light guide plate is provided with multiple pixel arrays. Light emitted by pixels in a same pixel array is pointed to a same viewing angle, and different pixel arrays have different viewing angles. At least one side of each rectangular light guide plate is provided with a light source group. Light emitted by the light source group enters the corresponding light guide plate, then emerges from pixels of respective pixel arrays on the light-emerging surface of the light guide plate, and is totally reflected at positions other than positions of the pixels within the light guide plate. Each of the pixels is a nano-diffraction grating.

Abstract: A directive color filter and a naked-eye 3D display apparatus are provided. The directive color filter includes a color filter and a directive functional structure layer. The color filter includes multiple light filtering units, and each light filtering unit includes at least three light filtering sub-units with different colors. The directive functional structure layer includes multiple structure units, and each structure unit and one light filtering unit are arranged correspondingly. Each structure unit includes at least three structure sub-units. Each structure sub-unit and one light filtering sub-unit are arranged correspondingly. Each structure sub-unit includes multiple nano diffraction gratings.

Abstract: A laser printing apparatus and method for a color dynamic image are provided. The laser printing apparatus includes an optical system and a recording material; the recording material includes a refraction layer formed by multiple microspheres or microlenses, and a shading layer formed on a focal plane of the multiple microshperes or microlenses; the optical system includes a laser and an graph generator, a laser light emitted by the laser irradiates onto the recording material after being processed by the image generator, the laser light irradiating onto the recording material is focused on the shading layer via the refraction layer, and a focus point is formed on the shading layer when energy of the focused laser light is greater than an evaporation threshold value of the shading layer.

Abstract: A directive colour filter and a naked-eye 3D display apparatus are provided. The directive colour filter includes a colour filter and a directive functional structure layer. The colour filter includes multiple light filtering units, and each light filtering unit includes at least three light filtering sub-units with different colours. The directive functional structure layer includes multiple structure units, and each structure unit and one light filtering unit are arranged correspondingly. Each structure unit includes at least three structure sub-units. Each structure sub-unit and one light filtering sub-unit are arranged correspondingly. Each structure sub-unit includes multiple nano diffraction gratings.

Abstract: A real-time variable parameter micro-nano optical field modulation system includes a light source, a 4F optical system and a set of light wave modulation optical components. The 4F optical system includes a first optical assembly and a second optical assembly arranged along an optical path in sequence. The light wave modulation optical components are arranged between the first optical assembly and the second optical assembly, and generate optical field distribution with adjustable patterns and structural parameters thereof on a back focal plane of the system by segmented modulation of sub-wavefronts.

Abstract: A method and a device for invoking a plug-in function are disclosed, which relate to the technical field of wed games. The method includes: detecting whether there exists a need to execute a function of a preset plug-in in an online game, and if there exists the need to execute the function of the preset plug-in in the online game, acquiring a type of a browser on which the online game is played; when the browser on which the online game is played is a non-IE browser, acquiring the preset plug-in and instantiating a refresh-free plug-in instance according to the preset plug-in; and invoking the refresh-free plug-in instance in the online game, and executing a function of the preset plug-in. Through the present invention, it is not required to refresh a webpage in an IE browser, and the function of the preset plug-in can be executed by instantiating the refresh-free plug-in instance, thereby improving the execution efficiency of the webpage.

Abstract: A real-time variable parameter micro-nano optical field modulation system includes a light source, a 4F optical system and a set of light wave modulation optical components. The 4F optical system includes a first optical assembly and a second optical assembly arranged along an optical path in sequence. The light wave modulation optical components are arranged between the first optical assembly and the second optical assembly, and generate optical field distribution with adjustable patterns and structural parameters thereof on a back focal plane of the system by segmented modulation of sub-wavefronts.

Abstract: A naked eye 3D display device is provided. The naked eye 3D display device includes a directional projection screen, a laser light source, a red monochromatic laser light source, a green monochromatic laser light source and a blue monochromatic laser light source. Lights emitted by the three monochromatic laser light sources emit incident light on the directional projection screen with nano-grating pixels at specific angles and specific positions, and the same emergent light fields are formed. The laser light source provides multi-perspective image pixels. The multi-perspective image pixels match a nano-grating pixel array on the directional projection screen. By a direct spatial modulation for the laser projection light, colorful 3D display is achieved. There is no crosstalk between various viewpoints. The naked eye 3D display device has no visual fatigue and has a low cost.

Abstract: A multi-view pixel directional backlight module and a naked-eye 3D display device are provided. The multi-view pixel directional backlight module includes at least two rectangular light guide plates closely stacked together. A light-emerging surface of the rectangular light guide plate is provided with multiple pixel arrays. Light emitted by pixels in a same pixel array is pointed to a same viewing angle, and different pixel arrays have different viewing angles. At least one side of each rectangular light guide plate is provided with a light source group. Light emitted by the light source group enters the corresponding light guide plate, then emerges from pixels of respective pixel arrays on the light-emerging surface of the light guide plate, and is totally reflected at positions other than positions of the pixels within the light guide plate. Each of the pixels is a nano-diffraction grating.

Abstract: A laser printing apparatus and method for a color dynamic image are provided. The laser printing apparatus includes an optical system and a recording material; the recording material includes a refraction layer formed by multiple microspheres or microlenses, and a shading layer formed on a focal plane of the multiple microshperes or microlenses; the optical system includes a laser and an graph generator, a laser light emitted by the laser irradiates onto the recording material after being processed by the image generator, the laser light irradiating onto the recording material is focused on the shading layer via the refraction layer, and a focus point is formed on the shading layer when energy of the focused laser light is greater than an evaporation threshold value of the shading layer.

Abstract: Systems and methods are provided for data exchange in voice communication. For example, a first request message is sent to a server for playing background music in voice communication; an authorization granted by the server to play background music separately from the voice communication is received; and upon reception of a play instruction from a user, the background music is played and an identifier of the background music is sent to the server. The server broadcasts the background music to one or more clients based on at least information associated with the identifier of the background music.

Abstract: Provided are a solar cell superfine electrode transfer thin film, manufacturing method and application method thereof. The electrode transfer thin film sequentially includes from bottom to top a substrate, a release layer, a resin layer and a hot melt adhesive layer; the resin layer is formed with electrode trenches therein; the electrode trenches are formed with electrodes therein; superfine conductive electrodes are continuously prepared on a transparent thin film via a roll-to-roll nanoimprinting method, the width of an electrode wire being 2 ?m-50 ?m, and the width of a typical line being 10 ?m-30 ?m. Directly attach the superfine electrodes of the hot melt adhesive layer to a solar cell by peeling off the substrate material, and sintering at a high temperature to volatilize the hot melt adhesive layer material while retaining the electrodes, thus the electrodes are integrally transferred, without poor local transfer.

Abstract: The present invention relates to the field of computers. Disclosed are an application program interface display method, device, terminal and readable storage medium. The method comprising: displaying a first window on the full screen and displaying a first application program interface in the first window; displaying a second window above the first window, and displaying a second application program interface in the second window; and always maintaining the first window in a focused state during switching between the first window and the second window. The above technical solution ensures that the application program interface displayed in the first window remains functional without losing the focused state, and the application program interface displayed in the second window remains to be displayed above the first window even in a non-focused state, thus facilitating operation.

Abstract: A colored, dynamic, and amplified security film includes a micro lens array layer, a base material layer, and a micro graphic layer. The layers meet the condition of Moore amplified imaging; the micro graphic layer is formed by a background area and a graphic area; the graphic area is distributed in the background area; the micro graphic layer includes a semi-transparent and semi-reflective metal layer, a medium layer, and a metal film layer successively from top to bottom; the metal film layer is of a planar structure; the thickness of the medium layer in the graphic area is greater than the thickness of the medium layer in the background area; and the thicknesses of semi-transparent and semi-reflective metal layers are consistent.

Abstract: A colored, dynamic, and amplified security film includes a micro lens array layer, a base material layer, and a micro graphic layer. The layers meet the condition of Moore amplified imaging; the micro graphic layer is formed by a background area and a graphic area; the graphic area is distributed in the background area; the micro graphic layer includes a semi-transparent and semi-reflective metal layer, a medium layer, and a metal film layer successively from top to bottom; the metal film layer is of a planar structure; the thickness of the medium layer in the graphic area is greater than the thickness of the medium layer in the background area; and the thicknesses of semi-transparent and semi-reflective metal layers are consistent.