US 12,298,002 B2
Reflective illumination structure and desk lamp
Guoli Zhu, Shanghai (CN); Min Han, Shanghai (CN); Defeng Ni, Shanghai (CN); and Congyi Lin, Shanghai (CN)
Assigned to Shanghai Sansi Electronic Engineering Co. Ltd., Shanghai (CN); Shanghai Sansi Technology Co. Ltd., Shanghai (CN); Jiashan Sansi Optoelectronic Technology Co. Ltd., Jiaxing (CN); Pujlang Sansi Optoelectronic Technology Co. Ltd., Jinhua (CN); and Zhejiang Puzhao Photoelectric Technology Co., Ltd., Jinhua (CN)
Filed by Shanghai Sansi Electronic Engineering Co. Ltd., Shanghai (CN); Shanghai Sansi Technology Co. Ltd., Shanghai (CN); Jiashan Sansi Optoelectronic Technology Co. Ltd., Jiaxing (CN); Pujiang Sansi Optoelectronic Technology Co. Ltd., Jinhua (CN); and Zhejiang Puzhao Photoelectric Technology Co.,Ltd., Jinhua (CN)
Filed on Sep. 4, 2024, as Appl. No. 18/823,750.
Claims priority of application No. 202311151432.8 (CN), filed on Sep. 6, 2023; and application No. 202322424371.X (CN), filed on Sep. 6, 2023.
Prior Publication US 2025/0075878 A1, Mar. 6, 2025
Int. Cl. F21V 7/00 (2006.01); F21S 6/00 (2006.01); F21V 17/10 (2006.01); F21V 21/26 (2006.01); F21V 23/00 (2015.01); F21V 29/70 (2015.01); F21V 29/89 (2015.01)
CPC F21V 7/0025 (2013.01) [F21S 6/003 (2013.01); F21V 17/10 (2013.01); F21V 21/26 (2013.01); F21V 23/008 (2013.01); F21V 29/70 (2015.01); F21V 29/89 (2015.01)] 10 Claims
OG exemplary drawing
 
1. A reflective illumination structure, comprising:
a heat dissipation base (1);
a lighting unit (2), disposed at a top of the heat dissipation base (1);
a reflective lampshade (3), configured to enclose the lighting unit (2), wherein an inner wall of the reflective lampshade (3) is provided with a specular reflection arc surface and a diffuse reflection arc surface;
wherein the specular reflection arc surface is disposed at a bottom end of the inner wall of the reflective lampshade (3), and the diffuse reflection arc surface is disposed at a top end of the inner wall of the reflective lampshade (3); a part of light emitted from the lighting unit (2) is directly emitted to the diffuse reflection arc surface, and another part of the light is reflected by the specular reflection arc surface and then is emitted to the diffuse reflection arc surface; an outer contour of the diffuse reflection arc surface is butterfly-shaped to satisfy that light reflected downward from the diffuse reflection arc surface becomes more uniform, and a lower edge of the reflective lampshade (3) is rectangular-shaped, such that all downward reflected light is limited by the lower edge of the reflective lampshade (3); the light reflected by the diffuse reflection arc surface is emitted through a bottom of the reflective lampshade (3) and forms a uniform rectangular light spot.