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US 11,994,660 B2Granted
Light-emitting module
AssigneeHergy International Corp.
InventorsChun-Hung Lu, Hong-Jyun Wang
Life of this patent
Estimating the term…
Abstract
A light-emitting module (1) includes a light-emitting unit (10) and a rod lens (20). The light-emitting unit (10) outputs a light (11). The rod lens (20) is adjacent to the light-emitting unit (10), and converges the light (11) along an optical axis (100). A radial direction of the rod lens (20) is parallel to the optical axis (100). A distance between an axis (21) of the rod lens (20) and a light-emitting center (12) of the light-emitting unit (10) along the radial direction is greater than or equal to a focal length of the rod lens (20) along the radial direction.
Claims8
A light-emitting module (1) comprising:
- a light-emitting unit (10) configured to output a light (11);
- and
- a rod lens (20) adjacent to the light-emitting unit (10), and configured to converge the light (11) along an optical axis (100);
- wherein a radial direction of the rod lens (20) is parallel to the optical axis (100), a distance between an axis (21) of the rod lens (20) and a light-emitting center (12) of the light-emitting unit (10) along the radial direction is greater than or equal to a focal length of the rod lens (20) along the radial direction;
- wherein a light-emitting angle of the light-emitting unit (10) outputting the light (11) is less than or equal to 2θ;
- wherein a following relationship is satisfied:
- θ
- =
- tan
- -
- 1
- (
- (
- W
- 2
- )
- /
- f
- )
- wherein f is the focal length of the rod lens (20) along the radial direction and W is a diameter of the rod lens (20) along the radial direction.
17 more elements
Dependencies are inferred from the claim text.