Abstract: A cholesteric liquid crystal polarizing grating includes two substrates, two alignment layers, and a liquid crystal layer. An interlayer space is formed between the two substrates. The two alignment layers are respectively located on inner surfaces of the two substrates facing the interlayer space. Alignment directions of the alignment layers are periodically arranged. An alignment plane of each alignment layer is divided into a plurality of rows. The alignment directions in a same row are the same, and the alignment directions in adjacent rows rotate relative to each other. The plurality of rows with the alignment directions rotated by 180 degrees defines a grating period. The liquid crystal layer is located in the interlayer space. Liquid crystal molecules adjacent to the two alignment layers are arranged following the alignment direction of each alignment layer to form a polarizing grating with the grating period.

Abstract: An intelligent window includes two substrates and a dimming layer. Each substrate is electrically connected to a voltage source. A switchable electric field is formed between the two substrates. The dimming layer is formed by filling a liquid crystal material between the two substrates. The liquid crystal material is formed by mixing a chiral molecule, a dichroic dye, and a salt ion in a nematic liquid crystal. A weight percentage concentration of the chiral molecule in the liquid crystal material is determined according to a limitation formula (I). C is the weight percentage concentration, n is a birefringence index of the liquid crystal material, p is a chiral force of the chiral molecule in micrometer?1, D is a thickness of the dimming layer in micrometer, m1 is a constant of multiaxial absorption condition in micrometer, and m2 is a constant of normally transparent condition.

Abstract: A resin composition is provided. The resin composition comprises: (A) an epoxy resin; (B) a maleimide-triazine resin; and (C) a first flame retardant having a structure of formula (I): wherein, Ar is a C3 to C18 heteroaryl or a C6 to C18 aryl; R1 is H or a C1 to C18 alkyl; and R2 and R3 are independently H, a C1 to C18 alkyl, a C3 to C18 heteroaryl, or a C6 to C18 aryl.

Abstract: An electrochromic composition is provided, including: a first oxidizable compound with a concentration range of 0.01M-0.5M; a reducible compound with a concentration range of 0.01M-0.5M; an electrolyte with a concentration range of 0.01M-0.

Abstract: A liquid crystal phase-shifting unit includes a first conductive substrate, a second conductive substrate disposed parallel to the first conductive substrate, and a liquid crystal layer disposed between the first conductive substrate and the second conductive substrate. A distance between the first conductive substrate and the second conductive substrate is defined as a liquid crystal cell thickness, which is less than or equal to 5 ?m. The liquid crystal layer includes a cholesteric liquid crystal, which has a pitch. The ratio of the liquid crystal cell thickness to the pitch is greater than or equal to 1. An antenna module including the liquid crystal phase-shifting unit is also provided.

Abstract: A gel-state electrolyte is provided herein. The gel-state electrolyte includes a solvent base; and spherical inorganic nanoparticles dispersed in the solvent base, wherein the spherical inorganic nanoparticles are bonded to each other through an M-O-M structure, wherein M is Ti, Si, Al, Zr, V, Fe, Ni, Zn, or a combination thereof.

Abstract: An auto framing method is applied to a camera apparatus with an image receiver and a screen. The auto framing method includes receiving a detection image from the image receiver, computing a distance between the image receiver and an identification feature of the detection image, switching a framing mode of the screen into a normal mode or a single mode in accordance with a comparison result of the distance and a predefined distance threshold, setting a preset step count and a preset frame interval to compute a coordinate variation of the identification feature when position difference between a current focus area and a cropping area generated by the framing mode conforms to a predefined difference condition, and utilizing the coordinate variation to acquire an area variation of the cropping area, and scaling the cropping area to a target resolution for displaying on the screen in accordance with the area variation.

Abstract: A pixel circuit of a display panel includes a light emitting device, a first transistor, a second transistor, a third transistor and a fourth transistor. The first transistor has a gate terminal, a drain terminal and a source terminal. The second transistor is coupled to the gate terminal of the first transistor. The third transistor is coupled to the source terminal of the first transistor. The fourth transistor, coupled to the drain terminal of the first transistor and the light emitting device, includes a gate terminal, a drain terminal and a source terminal. The gate terminal of the fourth transistor is coupled to a gate line on the display panel. The drain terminal of the fourth transistor is coupled to the gate line. The source terminal of the fourth transistor is coupled to the drain terminal of the first transistor.

Abstract: A light reflecting device includes two substrates and a liquid crystal layer. The two substrates are parallel to each other and respectively electrically connected to a voltage source to generate an electric field therebetween. Each of the two substrates has an inner surface having a horizontal orientation. The liquid crystal layer is formed by liquid crystal materials filled between the two substrates. The liquid crystal materials include liquid crystal molecules and ions of salt species. The liquid crystal molecules are at least formed by negative liquid crystals and chiral molecules. The liquid crystal layer is respectively switched to a diffuse reflection state and a specular reflection state by applying the electrical field generated by the voltage source in a first frequency and a second frequency. The second frequency is higher than the first frequency.

Abstract: An auto framing method is applied to a camera apparatus with an image receiver and a screen. The auto framing method includes receiving a detection image from the image receiver, computing a distance between the image receiver and an identification feature of the detection image, switching a framing mode of the screen into a normal mode or a single mode in accordance with a comparison result of the distance and a predefined distance threshold, setting a preset step count and a preset frame interval to compute a coordinate variation of the identification feature when position difference between a current focus area and a cropping area generated by the framing mode conforms to a predefined difference condition, and utilizing the coordinate variation to acquire an area variation of the cropping area, and scaling the cropping area to a target resolution for displaying on the screen in accordance with the area variation.

Abstract: An intelligent window includes two substrates and a dimming layer. Each substrate is electrically connected to a voltage source. A switchable electric field is formed between the two substrates. The dimming layer is formed by filling a liquid crystal material between the two substrates. The liquid crystal material is formed by mixing a chiral molecule, a dichroic dye, and a salt ion in a nematic liquid crystal. A weight percentage concentration of the chiral molecule in the liquid crystal material is determined according to a limitation formula (I). C is the weight percentage concentration, n is a birefringence index of the liquid crystal material, p is a chiral force of the chiral molecule in micrometer?1, D is a thickness of the dimming layer in micrometer, m1 is a constant of multiaxial absorption condition in micrometer, and m2 is a constant of normally transparent condition.

Abstract: A resin composition and uses thereof are provided. The resin composition includes: (A) an epoxy resin; (B) a bismaleimide resin; and (C) a first flame retardant having a structure of formula (I): Wherein Ar is a C3 to C18 heteroaryl or a C6 to C18 aryl; R1 is H or a C1 to C18 alkyl; and R2 and R3 are independently H, a C1 to C18 alkyl, a C3 to C18 heteroaryl, or a C6 to C18 aryl.

Abstract: An electrochromic composition including: a first oxidizable compound; a reducible compound; an electrolyte; and a solvent, wherein the first oxidizable compound is represented by the following formula: wherein X1, and X2 are independently substituted or unsubstituted aliphatic hydrocarbon groups, or substituted or unsubstituted aromatic hydrocarbon groups, wherein the aromatic hydrocarbon groups include: wherein each Rx is independently hydrogen, a C1-C16 alkyl group, a C1-C16 alkoxy group, a C1-C16 haloalkyl group, or halogen.

Abstract: An encryption and signature device for AI model protection is provided. The encryption and signature device for AI model protection includes a key derivation unit, a model encryption unit, a model password encryption unit, an image generation unit and a signature unit. The key derivation unit is configured to derive a model key according to a model password and a derivation function. The model encryption unit is configured to encrypt an AI model according to the model key to generate an encrypted AI model. The model password encryption unit is configured to encrypt the model password to generate an encrypted model password. The image generation unit is configured to generate an image file according to the encrypted model password and the encrypted AI model. The signature unit is configured to sign the image file according to a private key to obtain a signed image file.

Abstract: An electrically controlled polarization rotator is disclosed. The electrically controlled polarization rotator includes two substrates and a liquid crystal layer located between the two substrates. The two substrates have a homogeneous alignment and a homeotropic alignment respectively. A distance between the two substrates is a liquid crystal thickness. A switching electric field which is adjustable is provided between the two substrates. A polarized light is incident on the substrate having the homogeneous alignment. A polarization direction of the polarized light is orthogonal or parallel to an alignment direction of the substrate having the homogeneous alignment. A birefringence of the liquid crystal layer multiplied by the liquid crystal thickness and further divided by a wavelength of the polarized light is greater than 10. The polarization direction of the polarized light is rotated corresponding to an intensity of the switching electric field in the liquid crystal layer.

Abstract: A one-way glass with switching modes includes an absorbing layer located on a weak light side, a reflecting layer located on an intense light side, and a converting layer stacked between the absorbing layer and the reflecting layer. The absorbing layer absorbs first polarized light and allows second polarized light to pass through. The reflecting layer reflects the first polarized light and allows the second polarized light to pass through. Unpolarized light incident from the weak light side or from the intense light side is respectively converted into the polarized light. During the process of gradually adjusting the converting layer from a twisted state to a vertical state, rotated angles of polarization directions of the first polarized light and the second polarized light gradually decrease.

Abstract: An electrically controlled polarization rotator is disclosed. The electrically controlled polarization rotator includes two substrates and a liquid crystal layer located between the two substrates. The two substrates have a homogeneous alignment and a homeotropic alignment respectively. A distance between the two substrates is a liquid crystal thickness. A switching electric field which is adjustable is provided between the two substrates. A polarized light is incident on the substrate having the homogeneous alignment. A polarization direction of the polarized light is orthogonal or parallel to an alignment direction of the substrate having the homogeneous alignment. A birefringence of the liquid crystal layer multiplied by the liquid crystal thickness and further divided by a wavelength of the polarized light is greater than 10. The polarization direction of the polarized light is rotated corresponding to an intensity of the switching electric field in the liquid crystal layer.

Abstract: A projection type transparent display includes a polarization modulator and a reflective layer. The polarization modulator is stacked in sequence by a linear polarizer, a liquid crystal layer and a phase retarder. The reflective layer is stacked on the phase retarder. A projection light is incident on the linear polarizer to form a linearly polarized light. The liquid crystal layer changes a polarization direction of the linearly polarized light. Two kinds of linearly polarized projection lights with polarization directions orthogonal to each other are respectively formed and pass through the phase retarder to respectively form two kinds of circularly polarized projection lights with opposite rotation directions. A background light is incident on the reflective layer.

Abstract: A projection type transparent display includes a polarization modulator and a reflective layer. The polarization modulator is stacked in sequence by a linear polarizer, a liquid crystal layer and a phase retarder. The reflective layer is stacked on the phase retarder. A projection light is incident on the linear polarizer to form a linearly polarized light. The liquid crystal layer changes a polarization direction of the linearly polarized light. Two kinds of linearly polarized projection lights with polarization directions orthogonal to each other are respectively formed and pass through the phase retarder to respectively form two kinds of circularly polarized projection lights with opposite rotation directions. A background light is incident on the reflective layer.

Abstract: A smart window includes two transparent substrates and a liquid crystal layer. The two transparent substrates are opposite to each other and are electrically connected to a voltage supply. A first pulse voltage or a second pulse voltage is provided between the two transparent substrates by the voltage supply. The liquid crystal layer is located between the two transparent substrates and has a liquid crystal material. The liquid crystal material has a pitch of at most 250 nanometers or at least 500 nanometers. The liquid crystal material includes a nematic liquid crystal, a rotatory molecule, and a photochromic dye mixed with each other. The liquid crystal material changes a transmittance corresponding to a specific light wavelength range when receiving a light. The liquid crystal material is switched between a planar texture and a focal-conic texture respectively according to the first pulse voltage and the second pulse voltage.