Patent ID: 11898725
Assignee: SELF ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F | IPC F

Claim 13:
14. A jewelry lighting method, using the jewelry lighting lamp as claimed in claim 1, comprising:
using the main light source (11) to form a main light spot (113) which covers the jewelry;
using the at least one secondary light source (12) to form an auxiliary light spot (123) to illuminate a cutting surface on a periphery of the jewelry, wherein the auxiliary light spot (123) is contained within the main light spot (113) during rotation;
forming a superimposed light spot (123′) by superpositioning the auxiliary light spot (123) on the main light spot (113);
wherein the main light spot (113) has a brightness Bb, the auxiliary light spot (123) has a brightness Ba, and superimposed light spot (123′) has a brightness Ba+Bb, a luminance contrast is defined as C=Ba/Bb, and the luminance contrast C is less than a critical luminance contrast Cpro.