US 11,982,439 B2
Lens and light source module
Zuping He, Zhejiang (CN); Jun Yang, Zhejiang (CN); Liang Wu, Zhejiang (CN); Jianguo Dong, Zhejiang (CN); and Kai Xu, Zhejiang (CN)
Assigned to Self Electronics Co., Ltd., Ningbo (CN)
Filed by Self Electronics Co., Ltd., Zhejiang (CN); Wanjiong Lin, Zhejiang (CN); and Self Electronics USA Corporation, Norcross, GA (US)
Filed on Jun. 16, 2023, as Appl. No. 18/336,566.
Claims priority of application No. 202210761405.1 (CN), filed on Jun. 29, 2022.
Prior Publication US 2024/0003515 A1, Jan. 4, 2024
Int. Cl. F21V 5/04 (2006.01)
CPC F21V 5/045 (2013.01) 12 Claims
OG exemplary drawing
 
1. A lens (100) for covering a light source, comprising:
a light receiving surface (10) facing the light source (30), the light receiving surface having an optical axis, a light distribution surface (20) being opposite to the light receiving surface (10);
wherein said light receiving surface (10) is formed in a region away from a center of the optical axis with N sets of projections (11), where N≥1, each set of said projections (11) is facing the light source and provided with a first incident surface (111) facing towards the optical axis and a first reflective surface (112) facing away from the optical axis, said first incident surface (111) is adapted to refract light from the light source to the first reflective surface (112), said first reflective surface (112) of the lens is adapted to reflect the light to the light distribution surface (20),
said light receiving surface (10) has a depression region (12) near the center of the optical axis, said depression region (12) is provided with a second incident surface (121) adapted to refract the light to the light distribution surface (20),
the N sets of projections have a saw tooth profile and are distributed symmetrically around the optical axis.