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CN-121978845-A - Optical film with 3D light splitting function and manufacturing method thereof

CN121978845ACN 121978845 ACN121978845 ACN 121978845ACN-121978845-A

Abstract

The application relates to the field of optical display and material engineering, in particular to an optical film with a 3D light-splitting function and a manufacturing method thereof. The optical diaphragm with the 3D light splitting function comprises a transparent optical substrate and a microstructure layer integrally formed with the surface of the transparent optical substrate, wherein the microstructure layer comprises a cylindrical lens grating layer and a parallax barrier layer, the cylindrical lens grating layer is integrally formed on the surface of the transparent optical substrate, the cylindrical lens grating layer is a micro-nano structure formed by a nanoscale grating and a micron-sized cylindrical microlens array, and the parallax barrier layer is positioned on one side of the cylindrical lens grating layer, which is far away from the transparent optical substrate. The optical film has excellent optical efficiency, wider visual angle, excellent brightness uniformity and excellent moire inhibition capability, has the functions of 2D/3D switching, peeping prevention and the like, can adapt to the light demands of different scenes, can be directly integrated into various display devices as a core display optical element, and breaks the application limit of externally attached protective films.

Inventors

  • XING QI
  • LIU HONGCHUN
  • Chu Eryi
  • ZENG YUQING

Assignees

  • 深圳元维视界控股有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (10)

  1. 1. The optical film with the 3D light splitting function is characterized by comprising a transparent optical substrate and a microstructure layer integrally formed with the surface of the transparent optical substrate, wherein the microstructure layer comprises a cylindrical lens grating layer and a parallax barrier layer, the cylindrical lens grating layer is integrally formed on the surface of the transparent optical substrate, and the cylindrical lens grating layer is a micro-nano structure formed by a nano-scale grating and a micro-scale cylindrical lens array; The parallax barrier layer is positioned on one side of the lenticular lens grating layer, which is away from the transparent optical substrate, and is a switchable slit barrier formed by evaporating black metal chromium wires on the surface of the lenticular lens grating layer, and the switching of transverse/longitudinal parallax spectroscopy is realized by rotating the barrier direction by 90 degrees.
  2. 2. The optical film with the 3D light splitting function according to claim 1, wherein the feature size of the lenticular lens grating layer is 50 nm-5 μm, and the lenticular lens grating layer can achieve parallax light splitting in the horizontal direction ±15°.
  3. 3. The optical film with 3D spectroscopic function according to claim 1, wherein the black metal chromium has a line width of 5-8 μm and a line spacing of 60-120 μm.
  4. 4. The optical film with 3D spectroscopic function according to claim 1, wherein the micro-structured layer further comprises a micro-prism light guide plate, the micro-prism light guide plate being located on a side of the parallax barrier layer facing away from the lenticular layer, the micro-prism light guide plate being configured to converge a conventional 120 ° lambertian backlight into a ±20° directional light beam.
  5. 5. The optical film with 3D spectroscopic function of claim 4, wherein the microstructured layer further comprises a quantum dot brightness enhancement film, the quantum dot brightness enhancement film being positioned on a side of the microprism light guide plate facing away from the parallax barrier layer, the quantum dot brightness enhancement film cooperating with the microprism light guide plate to enhance light efficiency.
  6. 6. The optical film with 3D spectroscopic function of claim 5, wherein the microstructured layer further comprises a directional backlight coupling layer on a side of the quantum dot brightness enhancement film facing away from the microprism light guide plate, the directional backlight coupling layer being a composite structure of a PET/PC substrate and a high refractive index inorganic oxide coating.
  7. 7. The optical film with the 3D light splitting function according to claim 6, wherein alignment accuracy of +/-1 μm is realized by adopting high-transmittance OCA glue among the multilayer structures of the microstructure layers, and the light transmittance of the high-transmittance OCA glue is more than or equal to 95%.
  8. 8. The manufacturing method of the optical film with the 3D light splitting function is characterized by comprising the following steps of: s1, preparing a master model; processing a micro-nano structure master model formed by a grating and a cylindrical micro-lens array on a substrate; S2, preparing a cylindrical lens grating layer; under the matching of a master model, carrying out photo-curing micro-nano imprinting on a transparent optical substrate by adopting ultraviolet imprinting glue, and completing glue layer crosslinking curing within 20 seconds through a 365nm LED area light source, an exposure dose of 0.5-5 mW/cm < 2 > and a controllable pressure of 0.1MPa, thereby realizing high-fidelity transfer of a master model micro-nano structure; after curing and demolding, plating a high refractive index chalcogenide-inorganic hybrid coating on the formed micro-nano structure by adopting an atomic layer deposition process, and bonding and curing to obtain a cylindrical lens grating layer; S3, preparing a parallax barrier layer; Evaporating black metal chromium wires on the surface of the cylindrical lens grating layer by adopting an evaporation process to form a switchable slit barrier, so as to obtain a parallax barrier layer; s4, embedding a micro-prism light guide plate and a quantum dot brightness enhancement film; attaching a micro-prism light guide plate to the surface of the parallax barrier layer in an alignment manner, and attaching a quantum dot brightness enhancement film to the surface of the micro-prism light guide plate in a vacuum manner to finish the embedding operation of the micro-prism light guide plate and the quantum dot brightness enhancement film; S5, preparing a directional backlight coupling layer; Depositing a high refractive index inorganic oxide coating on the lower surface of the quantum dot brightness enhancement film by adopting an atomic layer deposition process, and then attaching a PET/PC (polyethylene terephthalate/polycarbonate) substrate to obtain a directional backlight coupling layer; S6, cutting; and (5) performing fine cutting according to the size of the panel of the equipment, and chamfering the edges to obtain the optical film.
  9. 9. The method for manufacturing the optical film with the 3D light splitting function according to claim 8, wherein in the manufacturing process of the optical film, a blue light interference confocal sensor is adopted to monitor the stamping force, the demolding speed and the interlayer alignment precision on line, the technological parameters are regulated in a closed loop mode, the local structural deviation is corrected through femtosecond laser direct writing, the structural error in a 600mm wide range is controlled to be less than +/-30 nm, and the yield is controlled to be more than 95%.
  10. 10. The method for manufacturing the optical film with the 3D light splitting function according to claim 9, wherein in the manufacturing process of the optical film, the residual adhesive layer is controlled to be 30+/-5 nm through an integrated on-line ellipsometry and closed loop thickness compensation module, the replication precision is more than 98%, and the roll-to-roll production speed is more than or equal to 0.5m/min.

Description

Optical film with 3D light splitting function and manufacturing method thereof Technical Field The application relates to the field of optical display and material engineering, in particular to an optical film with a 3D light-splitting function and a manufacturing method thereof. Background Naked eye 3D is a technology capable of realizing stereoscopic vision effect without wearing glasses, left and right eye images are separated in a mode of light barrier, cylindrical lenses, directional light sources and the like, and three-dimensional perception is formed by utilizing the parallax principle. The core technology comprises a parallax barrier, a micro-column lens array and pupil tracking, and is widely applied to a plurality of fields of game equipment, advertising screens, displays, mobile equipment and the like. The optical film with the 3D light splitting function is a core component for realizing naked eye 3D, the technical development of the optical film relies on three core fields of polarized optics, stereoscopic vision principles and micro-nano processing technology, and the optical film is a product of cross fusion of optical materials, display technology and precision manufacturing. Most of the existing naked eye 3D optical films have the practical problems of structural redundancy and process lag, and key optical performance performances such as optical efficiency, visual angle width, brightness uniformity, mole line inhibition capability and the like are general, so that the practical application effect is poor, and the bottleneck of the optical performance is needed to be solved. Meanwhile, most of the existing naked eye 3D optical films do not have the functions of 2D/3D switching and the like, and most of the existing naked eye 3D optical films are externally attached with protective films, so that the practical application range is limited. Therefore, optimizing the optical performance of the naked eye 3D optical film and enriching the functions thereof is a leading-edge subject which is necessary to be overcome. That is, there is a need to develop an open hole 3D optical film having excellent optical efficiency, a wider viewing angle, excellent brightness uniformity, and excellent moire suppression capability. Meanwhile, the obtained naked eye 3D optical film can integrate functions such as 2D/3D switching and the like, can adapt to light demands of different scenes, is directly integrated inside various display devices as a core display optical element, and breaks the limitation of externally attaching a protective film. Disclosure of Invention In order to optimize the optical performance of the naked eye 3D optical film and enrich the functions of the optical film, the application provides the optical film with the 3D light splitting function and a manufacturing method thereof. In a first aspect, the present application provides an optical film with a 3D light splitting function, which adopts the following technical scheme: An optical film with a 3D light splitting function comprises a transparent optical substrate and a microstructure layer integrally formed with the surface of the transparent optical substrate, wherein the microstructure layer comprises a cylindrical lens grating layer and a parallax barrier layer, the cylindrical lens grating layer is integrally formed on the surface of the transparent optical substrate, and the cylindrical lens grating layer is a micro-nano structure formed by a nano-scale grating and a micro-scale cylindrical micro-lens array; The parallax barrier layer is positioned on one side of the lenticular lens grating layer, which is away from the transparent optical substrate, and is a switchable slit barrier formed by evaporating black metal chromium wires on the surface of the lenticular lens grating layer, and the switching of transverse/longitudinal parallax spectroscopy is realized by rotating the barrier direction by 90 degrees. By adopting the technical scheme, the optical film disclosed by the application is composed of the transparent optical substrate and the microstructure layer integrally formed on the surface of the transparent optical substrate, and the combination between the transparent optical substrate and the microstructure layer is more stable. The micro-structure layer integrates the nano-scale grating and the micro-scale cylindrical lens at one time through the three-in-one design of the light field 3D display, the parallax barrier and the grating-lens composite micro-nano structure, and simultaneously realizes light splitting, focusing and polarization regulation and control through the collaborative design of the optical function under the micro-nano scale, thereby realizing the continuous light field reconstruction of 6 view points under 4K resolution, and effectively reducing crosstalk and brightness loss by a horizontal view angle of 120 degrees. The structure has the advantages that the superposition redundancy of the traditional