6 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.

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 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 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.