Optical film capable of deflecting visual angle
By designing an optical film containing a specific prism layer, deflecting the viewing angle, the existing optical film has solved the problem of low viewing angle and waste of light in driving display screens, achieving higher optical brightness and more effective light utilization.
Patent Information
- Application Number
- CN202411722143.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-04-15
AI Technical Summary
The existing optical film has the problem of low viewing angle in display screens at driving positions such as cars and aircrafts. The commonly used light-enhancing film will reduce the overall optical brightness and waste unnecessary light when increasing the viewing angle.
An optical film with a deflectable viewing angle is designed, including a substrate layer and a prism layer. The prism layer is composed of several rows of convex prisms. The cross-section of each row of prisms is a right triangle. The pitch between the prisms on the prism layer is 10-50 μm and the height of the prism is 5-25 μm. The optical film directly deflects light through a specific prism structure, changing the viewing angle.
By deflecting the optical film with a viewing angle, it can effectively improve the problem of low brightness in specific viewing angles such as aircraft, cars and high-speed rail driving displays, providing higher optical brightness and more effective light utilization.
Smart Images
Figure CN119828270A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an optical film. Background Art
[0002] With the continuous development and popularization of LCD in today's society, the demand for display in various complex environments is also increasing. Especially in driving positions such as cars and airplanes, unlike conventional display devices, there is a certain angle between the user and the screen, and the brightness will be low.
[0003] If you use the method of adjusting the viewing angle by adjusting the liquid crystal, it is time-consuming and laborious, and the light loss is large. The common method on the market is to use a brightness enhancement film that increases the viewing angle. This brightness enhancement film that increases the viewing angle still continues the characteristics of ordinary brightness enhancement films, which is to focus the divergent light to the middle angle. In the case of increasing the viewing angle, it not only reduces the overall optical brightness, but also does not change the light waste at unnecessary viewing angles. Summary of the invention
[0004] In order to overcome the above-mentioned deficiencies of the optical films in the prior art, the present invention provides an optical film with a deflected viewing angle.
[0005] The technical solution of the present invention to solve the technical problem is: an optical film for deflecting viewing angle, comprising a substrate layer, wherein a prism layer is further provided on the front side of the substrate layer; The prism layer is composed of several rows of raised prisms, each row of prisms has a right triangle cross section, one right-angled side of the right triangle is located on the substrate layer, the pitch between prisms on the prism layer is 10-50 μm, and the height of the prism is 5-25 μm.
[0006] Furthermore, an isolation layer is provided on the back side of the substrate layer.
[0007] Furthermore, the isolation layer is acrylic resin, and the isolation layer contains lubricating particles.
[0008] Furthermore, the lubricating particles are PMMA particles, or PBMA particles, or PET particles, or PU particles.
[0009] The beneficial effects of the present invention are: providing an optical film for deflecting viewing angle, using a specific prism to directly deflect light to change the viewing angle, and easily solving the problem of low brightness at a specific viewing angle of aircraft, automobiles, high-speed rail driving display screens, and special display screens. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION
[0011] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0012] Reference Figure 1 An optical film for deflecting viewing angle comprises a substrate layer 1, and a prism layer 2 is also provided on the front side of the substrate layer 1.
[0013] The prism layer 2 is composed of several rows of raised prisms, each row of prisms has a right triangle cross section, one right-angled side of the right triangle is located on the substrate layer, the pitch between the prisms on the prism layer is controlled between 10μm-50μm, and the height of the prism is controlled between 5μm-25μm.
[0014] The present invention utilizes a specific prism to directly deflect light to change the viewing angle, thereby easily solving the problem of low brightness at a specific viewing angle of aircraft, automobile, high-speed rail driving display screens, and special display screens.
[0015] In one embodiment, an isolation layer 3 is further provided on the back side of the substrate layer 1. The isolation layer 3 is made of acrylic resin and contains slippery particles. The slippery particles may be PMMA particles, PBMA particles, PET particles, or PU particles.
[0016] Viewing angle brightness test: The optical films are assembled into the same module. A 32-inch side-entry backlight module is used here. The basic assembly is composed of an upper diffusion film + an optical film with a deflected viewing angle of the present invention + a lower diffusion film + a light guide plate + a reflective film. The module is fixed on a rotating platform and tilted at a certain angle for brightness testing. The following is a comparison result. It can be seen from the details that the finished product has better brightness at a deflection angle than current products on the market.
[0017]
[0018] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0019] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An optical film for deflecting viewing angle, comprising a substrate layer, characterized in that: The front side of the substrate layer is also provided with a prism layer; The prism layer is composed of several rows of raised prisms, each row of prisms has a right triangle cross section, one right-angled side of the right triangle is located on the substrate layer, the pitch between prisms on the prism layer is 10-50 μm, and the height of the prism is 5-25 μm.
2. The optical film for deflecting viewing angle according to claim 1, characterized in that: An isolation layer is also provided on the back side of the substrate layer.
3. The optical film for deflecting viewing angle as claimed in claim 2, characterized in that: The isolation layer is acrylic resin and contains smooth particles.
4. The optical film for deflecting viewing angle as claimed in claim 3, characterized in that: The lubricating particles are PMMA particles, or PBMA particles, or PET particles, or PU particles.