6results about How to "Reduce the refractive index difference" patented technology

The invention provides a display panel and a display device. The display panel comprises a substrate; the display function layer is arranged on one side of the substrate; the light extraction layer is located on the side, away from the substrate, of the display function layer, and the light extraction layer comprises a first light extraction layer, a second light extraction layer and a third light extraction layer which are sequentially arranged in a stacked mode in the direction away from the substrate; the refractive index of the second light extraction layer is larger than the refractive index of the first light extraction layer and the refractive index of the third light extraction layer. According to the display panel provided by the invention, the refractive index of the second light extraction layer is relatively high so as to improve the microcavity effect and improve the light extraction efficiency, and the refractive index of the first light extraction layer and the third light extraction layer is relatively low so as to reduce the refractive index difference with other film layers, so that the total reflection phenomenon caused by mismatching of the refractive indexes is avoided; the light extraction efficiency and the power consumption benefit can be improved, so that the performance of the display panel is improved.

The application relates to an ultra-low-loss large-effective-area optical fiber, which comprises, from inside to outside along the radial direction of the optical fiber, a core layer, a first gradient layer, an inner cladding layer, a second gradient layer, a sunken cladding layer, a third gradient layer, a transition cladding layer, a fourth gradient layer and an outer cladding layer; the core layer is chlorine-boron co-doped or chlorine-fluorine co-doped silica and is not doped with germanium; the first gradient layer, the inner cladding layer, the second gradient layer, the sunken cladding layer, the third gradient layer, the transition cladding layer and the fourth gradient layer are all fluorine-boron co-doped silica; and the outer cladding layer is pure silica. The application can solve the optical fiber attenuation problem caused by the viscosity imbalance of the existing optical fiber structure while having ultra-low loss and large effective area.

The present invention discloses a method for preparing a high aluminum content lithium aluminum silicon microcrystalline glass without a nucleating agent, and relates to the technical field of microcrystalline glass. The present invention does not contain a nucleating agent in the precursor glass composition, which is not only conducive to reducing the coloring of the glass and the decrease in light transmittance caused by the metal ions of the nucleating agent, but also a single crystal phase can be formed in the microcrystalline glass of the composition of the present invention, and the crystallization phase is close to the main composition of the glass phase, which reduces the refractive index difference between the crystallization phase and the glass phase, and improves the light transmittance of the microcrystalline glass. The high aluminum glass composition of the present invention is helpful to improve the ion exchange surface strengthening efficiency of the microcrystalline glass. The composition and process of the present invention are used to prepare a lithium aluminum silicon microcrystalline glass with a high aluminum content. 2 O、Al 2 O 3 、SiO 2 , MgO, ZnO, CaO, B 2 O 3 Lithium aluminum silicon glass-ceramics can be prepared using common inorganic non-metallic chemical raw materials and mineral powders, which has the advantages of reduced cost and simple and easy production process.

The invention discloses a sulfur-containing isocyanate-terminated first oligomer, a preparation method of the sulfur-containing isocyanate-terminated first oligomer, a sulfur-containing hydroxyl-terminated second oligomer, a preparation method of the sulfur-containing hydroxyl-terminated second oligomer, a photopolymer type holographic recording medium and a holographic optical element. The film-forming resin comprises a sulfur-containing isocyanate-terminated first oligomer and a polyhydroxy compound, or the film-forming resin comprises a sulfur-containing hydroxyl-terminated second oligomer and a polyfunctional isocyanate. In this way, environmental pollution and damage to health of production personnel caused by volatilization of mercaptan in the preparation process of the photopolymer type holographic recording medium can be effectively avoided, and the average refractive index of the photopolymer is increased.

The application provides a display panel and a display device. The display panel comprises a substrate, a display function layer arranged on one side of the substrate, and a light extraction layer located on the side of the display function layer away from the substrate. The light extraction layer comprises a first light extraction layer, a second light extraction layer and a third light extraction layer arranged in sequence in the direction away from the substrate. The refractive index of the second light extraction layer is greater than the refractive index of the first light extraction layer and the refractive index of the third light extraction layer. The display panel provided by the application has a high refractive index of the second light extraction layer, which is beneficial to improving the microcavity effect and the light extraction efficiency. The refractive index of the first light extraction layer and the third light extraction layer is low, which is beneficial to reducing the refractive index difference between the display panel and other film layers, avoiding total reflection caused by the mismatch of the refractive index, improving the light extraction efficiency and power consumption, and improving the performance of the display panel.

The present application relates to a kind of laminated optical films, it is sequentially laminated with the 1st optical film, the 1st adhesive layer, the 2nd optical film, the 2nd adhesive layer and the 3rd optical film, wherein, the 1st adhesive layer and the 2nd adhesive layer are the cured product layer of laminated optical film adhesive composition containing curable component and metal oxide particles.It is preferable that the refractive index of the 1st adhesive layer and the 2nd adhesive layer is 1.55 or more.It is preferable that the refractive index of the 1st optical film and the 2nd optical film is 1.55 or more.It is preferable that the 1st optical film and the 2nd optical film are both phase difference films of liquid crystal type, and it is preferable that the 3rd optical film is at least a polarizing film with polarizer.