4 results about "Molecular alignment" patented technology

A FLC cell includes upper substrate and lower substrates, upper and lower transparent conductive layers, upper and lower alignment layers, and a FLC layer. The upper and lower substrates are arranged to define an enclosed region. The upper transparent conductive layer is disposed on the upper substrate. The lower transparent conductive layer is disposed on the lower substrate. The upper alignment layer is disposed on the upper transparent conductive layer. The lower alignment layer is disposed on the lower transparent conductive layer. The FLC layer is positioned between the upper alignment layer and the lower alignment layer. The upper alignment layer and the lower alignment layer are configured to provide an anchoring energy to FLC molecules of the FLC layer. The anchoring energy is balanced with the helical elastic energy of ferroelectric liquid crystal of the FLC layer to achieve stable molecular alignment and high-contrast electro-optical performance.

This invention belongs to the field of spectral analysis technology and relates to a liquid crystal metasurface composite blazed angle grating and a spectrometer. The liquid crystal metasurface composite blazed angle grating includes a planar substrate, a photo-alignment layer, and a liquid crystal layer stacked sequentially from bottom to top. The photo-alignment layer uses a photosensitive alignment material, and when irradiated by polarized light, its surface forms a molecular alignment pattern matching a preset composite phase distribution. The liquid crystal layer uses a high birefringence nematic liquid crystal material, and its internal liquid crystal molecules are arranged under the control of the molecular alignment pattern of the photo-alignment layer to form a liquid crystal metasurface structure matching a preset composite phase distribution. When composite light passes through the planar substrate and irradiates the liquid crystal metasurface structure, the liquid crystal molecules generate differentiated phase modulation of incident light of different wavelengths according to the gradient of the preset composite phase distribution, so that incident light of different wavelengths is diffracted and deflected at different angles, simultaneously realizing the dispersion and focusing imaging of composite light, thereby forming a spectrum.

The application discloses a method and system for improving transparency of polyimide molecular arrangement induced by an external electric field and a polyimide film. The method comprises the following steps: S1, preparing a polyimide film-forming solution, which is a polyimide precursor solution or a soluble polyimide solution; S2, coating the polyimide film-forming solution on a conductive substrate to form a wet film; and S3, applying an external electric field to the wet film during heat treatment of the wet film, so that the wet film is solidified to form a polyimide film. The system comprises a heating table, a conductive substrate, an insulating gasket, an electrode and an electric field generating device. The polyimide film is prepared by the above method. The application realizes spatial rearrangement of molecular chains by an electric field, increases the average distance between molecules and changes the stacking angle, greatly reduces the probability of electronic transition, thereby weakening the electronic transition probability of color-producing groups that absorb visible light without changing the chemical structure, and significantly improves the light transmittance.

The invention discloses a method and system for improving transparency by inducing polyimide molecule arrangement through an external electric field and a polyimide film, and the method comprises the following steps: S1, preparing a polyimide film-forming solution which is a polyimide precursor solution or a soluble polyimide solution; s2, coating a conductive substrate with the polyimide film forming solution to form a wet film; and S3, in the wet film heat treatment process, applying an external electric field to the wet film, so that the wet film is cured to form the polyimide film. The system comprises a heating table, a conductive substrate, an insulating spacer, an electrode and an electric field generating device. The polyimide film is prepared by the method. According to the invention, spatial rearrangement of molecular chains is realized through an electric field, the average distance between molecules is increased, the stacking angle is changed, and the electron transition probability is greatly reduced, so that the electron transition probability of chromophores absorbing visible light is weakened and the light transmittance is remarkably improved on the premise of not changing a chemical structure.