Optical lighting device of vehicles

• US 10,641,450 B2
• Filed: 04/18/2019
• Issued: 05/05/2020
• Est. Priority Date: 04/18/2018
• Status: Active Grant

• Current Assignee: Shutter Precision Co., Ltd.
• Original Assignee: Shutter Precision Co., Ltd.
• Inventors: Lin, Po-Chou
• Primary Examiner(s): Neils, Peggy A
• Application Number:
  US16/388,107
• Publication Number:
  US 20190323671A1
• Time in Patent Office: 383 Days
• CPC Class Codes: F21S 41/143 the main emission direction of the LED being parallel to the optical axis of the illuminating device
• CPC Class Codes: F21S 41/153 arranged in a matrix
• CPC Class Codes: F21S 41/255 Lenses with a front view of circular or truncated circular outline
• CPC Class Codes: F21S 41/60 characterised by a variable light distribution
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 13/08 Anamorphotic objectives
• CPC Class Codes: G02B 19/0009 having refractive surfaces only
• CPC Class Codes: G02B 19/0014 at least one surface having optical power
• CPC Class Codes: G02B 19/0066 in the form of an LED array
• CPC Class Codes: G02B 27/0911 Anamorphotic systems
• CPC Class Codes: G02B 27/0955 Lenses lenses per se G02B3/00

Abstract

An optical lighting device includes an optical element having a light incident surface and a light emitting surface, wherein at least one first anamorphic asphere is deployed on either of the light incident surface or the light emitting surface. A first light source being square deployed on one side of the optical element and opposite to the light incident surface. The light source projects into the light incident surface, refracts by the first anamorphic asphere, transmits out of the light emitting surface and forms a predetermined light distribution area with a cut-off line on the upper fringe. Therefore, the optical lighting device has the advantage of simplified structure and high lighting efficiency.

Claims

1. An optical lighting device of vehicles for projecting light on a predetermined area comprises:

an optical element, having a light incident surface, and a light emitting surface opposite to the light incident surface, wherein at least either of the light incident surface or the light emitting surface includes a first anamorphic asphere; and

a first light source having a square shape and projecting ray directly into the light incident surface, by a refraction of the first anamorphic asphere, then transmitting out of the light emitting surface and forming a light distribution pattern at the predetermined area,

wherein the first anamorphic asphere and its relative X-Y-Z coordination satisfies the following formula;

2. An optical lighting device according to claim 1, wherein the corresponding relationship for forming the first anamorphic asphere and the second anamorphic asphere among the symmetry coefficients, the asymmetry coefficients, the conic coefficients and the curvature are A_2n=A′

_2n;

B_2n=B′

_2n;

C_x=C′

_x;

K_x=K′

_x;

C_y≠

C′

_y;

K_y≠

K′

_y.

3. An optical lighting device according to claim 1, wherein the optical element is either a lenticular lens or a plano-convex convex lens.

4. An optical lighting device according to claim 1, includes a second light source deployed on one side of the optical element, opposite to the light incident surface and aligned to the first light source.

5. An optical lighting device according to claim 1, further includes a plurality of the second light sources in a matrix formation with the first light source, and the first light source and the second light sources are arranged on one side of the optical element and opposite to the light incident surface.

6. An optical lighting device according to claim 1, wherein a cut-off line is formed on a fringe of the light distribution area.