10 results about "Dye doped" patented technology

An electronic eyewear device including a spatial dimming pixel panel within an optical assembly that delivers improved backlighting conditions for displayed images. The spatial dimming pixel panel is spatially dimmed where an image is positioned on a display, and the unoccupied area of the display is not dimmed (undimmed), thereby unaltering the real-world view through that portion of the display. The spatial dimming pixel panel is made of multiple liquid crystal cells arranged in a gridded orientation with a dye-doped or guest-host liquid crystal system having a phase change mode with homeotropic alignment. The spatial dimming pixel panel absorbs nonpolarized light when a voltage is applied across the cells and passes nonpolarized light in the absence of a voltage across the cells.

The invention provides an organic light-emitting device, a display panel, a preparation method and a display device. The organic light-emitting device comprises an anode layer, a light-emitting layer and a cathode layer which are sequentially stacked; wherein the light-emitting layer comprises a host material, a sensitizer and a dye; the sensitizer and the dye are doped in the main body material, and in the direction from the anode layer to the cathode layer, the doping concentration of the sensitizer is reduced, and the doping concentration of the dye is increased. According to the technical scheme, the service life and the luminous efficiency of the organic electroluminescent device can be improved.

An electronic eyewear device including a spatial dimming pixel panel within an optical assembly that delivers improved backlighting conditions for displayed images. The spatial dimming pixel panel is spatially dimmed where an image is positioned on a display, and the unoccupied area of the display is not dimmed (undimmed), thereby unaltering the real-world view through that portion of the display. The spatial dimming pixel panel is made of multiple liquid crystal cells arranged in a gridded orientation with a dye-doped or guest-host liquid crystal system having a phase change mode with homeotropic alignment. The spatial dimming pixel panel absorbs nonpolarized light when a voltage is applied across the cells and passes nonpolarized light in the absence of a voltage across the cells.

The application provides an optical element, an optical encryption device and an encryption method, and relates to the technical field of optical materials. The optical element is formed by stacking a liquid crystal cell based on a positive nematic liquid crystal layer and a phase retardation plate. By accurately controlling the stacking angle of the stretching direction of the phase retardation plate and the orientation direction of the orientation film, a twisted stacking structure is constructed, so that the optical element has high g lum , a high FOM value, multiple responsiveness and arbitrary patterning capability. In addition, the optical encryption device provided by the application is prepared based on the optical element. Since the optical encryption device includes polymerizable liquid crystal monomers and / or a second fluorescent dye doped in the positive nematic liquid crystal layer, the circularly polarized luminescence generated by the optical element can be adjusted by multiple external stimuli, so that the optical encryption device can be designed by multiple encryption methods, and application requirements in the fields of multi-dimensional data coding, high-level anti-counterfeiting and information encryption can be met.

The invention provides a magnetic field regulation and control circular polarization light-emitting structure, a preparation method of the magnetic field regulation and control circular polarization light-emitting structure and application of the magnetic field regulation and control circular polarization light-emitting structure in the aspects of visualization, multi-dimensional data coding, anti-counterfeiting, information encryption and the like. The magnetic field regulation and control circular polarization light-emitting structure comprises a dye-doped composite PDMS (Polydimethylsiloxane) film; and the Ag coated Fe3O4 nanowire layer is compounded on the dye doped composite PDMS thin film. Compared with the prior art, the CPL is directly generated through the light-induced polymerization process, and the wavelength and optical rotation of the CPL can be accurately adjusted by regulating and controlling the molecular characteristics of the doped dye or the thermally induced phase change (from blue phase to red phase) of PDA; the strategy supports the preparation of a multi-color CPL microarray, the realization of a switchable logic gate and a multi-level information storage and encryption function; the method provides a new path for in-situ adjustment of fluorescence and CPL distribution in the flexible film, and has a wide application prospect in the fields of multi-dimensional information encryption, advanced anti-counterfeiting and intelligent optical devices.

The application relates to the technical field of optical filters, and discloses an electronic ND filter based on liquid crystal dimming and a control method thereof. The filter comprises a shell, an electronic ND liquid crystal screen and a control circuit. The electronic ND liquid crystal screen is provided with a first liquid crystal dye layer containing dye-doped liquid crystal. The control method comprises the following steps: obtaining a target transmittance gear instruction and mapping a target driving voltage; the control circuit outputs an alternating square wave driving voltage with a positive and negative level maintenance time ratio of 1:1 to the first liquid crystal dye layer; the arrangement angle of liquid crystal molecules is changed to adjust the light transmittance; when the system is not powered, the initial arrangement direction of the liquid crystal molecules is orthogonal to the initial polarization direction of the polarizing film, and the lowest transmittance is output; the filter is provided with a 1 / 4 lambda wave plate clamped between the two liquid crystal dye layers, and the wave plate is used for absorbing internal interface reflected light by using the polarization state conversion effect of the wave plate. The application eliminates the stray reflection of the structural interface, prevents the polarization failure of the liquid crystal molecules, and provides power-off light shielding protection.

The invention provides a flexible optical pressure sensitive film, an intracranial pressure optical fiber sensor and a preparation method thereof. The intracranial pressure optical fiber sensor comprises a flexible optical pressure sensitive film, a sleeve and an optical fiber, the flexible optical pressure sensitive film is fixedly carried at the tail end of the sleeve, and the sleeve sleeves the end part of the optical fiber. The flexible optical pressure sensitive film comprises an elastomer material and a fluorescent dye doped in the elastomer material. The method comprises the following steps: dissolving a fluorescent dye in a solvent, then uniformly mixing with an elastomer material, removing the solvent and bubbles, and carrying out spin coating and drying to obtain the flexible optical pressure sensing film, and fixedly loading the sleeve on the end face of the optical fiber, fixedly loading the flexible optical pressure sensing film at the tail end of the sleeve, and carrying out sealing treatment to obtain the intracranial pressure optical fiber sensor. The intracranial pressure sensor is novel in structure and stable in performance, the double-layer hydrogel optical fiber is good in biocompatibility and flexibility and not prone to brittleness, damage to organisms is avoided even if the double-layer hydrogel optical fiber is broken, process conditions are mild, and large-scale production is facilitated.

The present disclosure discloses AR glasses including an image projection device, an optical lens, a beam splitter, a first 1 / 4λ wave plate, a curved half-mirror, and a liquid crystal dimming film. The liquid crystal dimming film includes a polarizer and a dye-doped liquid crystal layer. The light transmittance of the dye-doped liquid crystal layer is adjusted by an applied voltage. When the liquid crystal layer absorbs light, it can effectively block external stray light, and also prevent viewing displayed image from being viewed from an outside world to achieve privacy protection. This greatly improves the contrast of the virtual image and enhance the immersion.

The application provides a multiple stimulus response transverse electric control liquid crystal dimming film and a preparation method and application, and belongs to the technical field of liquid crystal materials.The dimming film is composed of a first substrate layer, a first conductive layer, a first vertical alignment layer, a dye-doped thiol-epoxy liquid crystal polymer composite functional material layer, a second vertical alignment layer, a second conductive layer and a second substrate layer which are sequentially stacked along the thickness direction.Meanwhile, the dimming film can form multiple optical states such as a transparent state without electricity, a low-frequency electric field absorption state, a high-frequency electric field color state and a high-temperature absorption enhancement state, and has good light-on state transmittance, low driving voltage, low threshold voltage and high substrate peeling strength, so that the application solves the problems that the existing polymer stabilized liquid crystal transverse electric control dimming film is difficult to simultaneously realize low driving voltage and high peeling strength, and the function is single and cannot simultaneously have active electric field control and passive external temperature response dimming.

The invention relates to a fluorescent dye doped cholesteric liquid crystal microcapsule and a preparation method thereof, and belongs to the technical field of functional material preparation. The microcapsule is prepared by taking cholesteric liquid crystal doped with fluorescent dye as a core material and a high polymer material as a wall material through an interfacial polymerization method. The microcapsule is uniform in particle size (10-150 [mu] m), is spherical in appearance, and has excellent physical and chemical stability, optical performance and mechanical strength. The cholesteric liquid crystal in the core material forms a periodic spiral structure through the synergistic effect of the chiral agent and the micromolecular nematic liquid crystal, the cholesteric liquid crystal is doped with the fluorescent dye to generate remarkable color regulation and control capability and fluorescence characteristics, and meanwhile, the microcapsule is endowed with cpl performance. By optimizing the process conditions of emulsification, stirring, reaction and the like and regulating and controlling the concentration of the fluorescent dye, the microcapsule shows remarkable fluorescent response and excellent environmental adaptability under a multi-band excitation light source. The preparation method provided by the invention is efficient, simple and convenient, the concentration of the fluorescent dye can be regulated and controlled according to actual requirements, and precise anti-counterfeiting application of low-concentration doping and strong fluorescent anti-counterfeiting and sensor application of high-concentration doping are realized. The method has a wide application prospect in the fields of optical display, anti-counterfeiting technology and sensing.