The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2024
Filed:
Jul. 11, 2023
Jiaxing Uphoton Optoelectronics Technology Co., Ltd., Tongxiang, CN;
Peng Chen, Tongxiang, CN;
Guofang Sun, Tongxiang, CN;
Lei Sui, Tongxiang, CN;
Kehan Tian, Tongxiang, CN;
JIAXING UPHOTON OPTOELECTRONICS TECHNOLOGY CO., LTD., Tongxiang, CN;
Abstract
A grating structure, a diffraction optical waveguide, and a display device are disclosed. The grating line of the grating structure has a cross-sectional profile with a narrow top and a wide bottom, wherein the cross-sectional profile comprises six feature points, and the six feature points respectively have coordinates (0, 0), (L2, H2), (L3, H3), (L4, H4), (L5, H5) and (L6, 0) in a cross section, and satisfy following relationships: H=min(H4,H5)−max(H3,H2)>50 nm; 0.1<(L5−L4)/(L3−L2); L3>0.34T; and 0.05T<L5−L4<0.32T. By controlling the parameters of these feature points, the cross-sectional profile can be adjusted, and thus significantly improving the optical effect (comprising diffraction efficiency and uniformity) that the grating structure can achieve, and at the same time increasing degrees of freedom in grating design and optical effect regulation.