Sony patents light guide plate design to fix display image quality
Sony has filed a patent for a specific design of a light guide plate, a component used to spread light evenly in displays. The invention adds a curved transition zone between two diffraction gratings to reduce unwanted visual effects caused by the physical structure.
In the filing’s own words
A technology for reducing an adverse effect caused by a structure formed near a diffraction grating is provided. The present disclosure provides a light guide plate unit including: a light guide plate; a first diffraction grating on a first surface side of the light guide plate, a second diffraction grating on the first surface side of the light guide plate, and a transition zone structure on the first surface side of the light guide plate. The transition zone structure extends from a first end point at or adjacent to the first diffraction grating to a vertex point, and from the vertex point to a second end point at or between the first end point and the second diffraction grating. The first and second end points are closer to the first surface of the light guide plate than the vertex point.
What exactly they claim (claim 1)
1. A light guide plate unit, comprising: a light guide plate; a first diffraction grating on a first surface side of the light guide plate; a second diffraction grating on the first surface side of the light guide plate; and a transition zone structure on the first surface side of the light guide plate, wherein the transition zone structure extends from a first end point at or adjacent to the first diffraction grating to a vertex point, and from the vertex point to a second end point at or between the first end point and the second diffraction grating, and wherein the first and second end points are closer to the first surface of the light guide plate than the vertex point.
Facts
- Company
- Sony (SONY GROUP CORPORATION)
- Official title
- LIGHT GUIDE PLATE UNIT AND IMAGE DISPLAY DEVICE
- Publication number
- US20260287893A1
- Application number
- 18996238
- Filed
- Jul 21, 2023
- Published
- Sep 24, 2026
- Inventors
- 5
- Claims
- 26
Classified under
G02B 27/0172 Physics & computingG02B 2027/011 Physics & computingG02B 2027/0125 Physics & computingG02B 2027/0178 Physics & computingMore from Sony in AR, VR & displays
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.