Optical lighting device of vehicles

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: $z=\frac{c_x{x}^2+c_y{y}^2}{1+\sqrt{1-\left(1+k_x\right)c_x^2{x}^2-\left(1+k_y\right)c_y^2{y}^2}}+\underset{n=2}{\overset{10}{.Math.}}{A_{2n}\left[\left(1-B_{2n}\right)x^2+(1+B_{2n})y^2\right]}^n$ wherein A.sub.2n is a symmetry coefficient B.sub.2n is an asymmetry coefficient K.sub.x,K.sub.y a conic coefficients, and C.sub.x,C.sub.y are curvatures, wherein the optical element includes a second anamorphic asphere connected to the first anamorphic asphere, and the X-Y-Z coordination of the second anamorphic asphere satisfies the following formula: $z=\frac{c_x^{}{x}^2+c_y^{}{y}^2}{1+\sqrt{1-\left(1+k_x^{}\right)c_x^2{x}^2-\left(1+k_y^{}\right)c_y^2{y}^2}}+\underset{n=2}{\overset{10}{.Math.}}{A_{2n}^{}\left[\left(1-B_{2n}^{}\right)x^2+(1+B_{2n}^{})y^2\right]}^n$ wherein the A.sub.2n is a symmetry coefficient, B.sub.2n is asymmetry coefficient, k.sub.x,K.sub.Y are conic coefficients, and C.sub.x,C.sub.y are curvatures, and wherein the first anamorphic asphere and the second anamorphic asphere occupy the same X-Y-Z coordination, the first anamorphic asphere faces to the Y0 direction, and the other anamorphic asphere faces to the Y0 direction.

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.sub.2n=A.sub.2n; B.sub.2n=B.sub.2n; C.sub.x=C.sub.x; K.sub.x=K.sub.x; C.sub.yC.sub.y; K.sub.yK.sub.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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic view that the optical element is opposite to the first light source.

(2) FIG. 2 is a schematic view that the optical element is opposite to the first light source.

(3) FIG. 3 is a perspective view that the optical element is opposite to the first light source.

(4) FIG. 4 is a schematic view that the optical element is opposite to the first light source.

(5) FIG. 5 is a drawing of a light distribution pattern when a light transmits out of the optical element by the projection of the first light source.

(6) FIG. 6 is a drawing of light distribution pattern of which the optical element is configured with two anamorphic spheres.

(7) FIG. 7 is a schematic view of light arrangement that the first and the second light sources are opposite to the optical element.

(8) FIG. 8 is a drawing of light distribution pattern when a light transmits out of the optical element by the projection of the first and the second light sources.

(9) FIG. 9 is a schematic view of light arrangement that a first light source and a plurality of the second light sources are opposite to the optical element.

(10) FIG. 10 is a drawing of light distribution pattern that a first light source and a plural of the second light sources are in matrix formation and opposite to the optical element.

(11) FIG. 11 is a schematic view that the optical element is a Plano-convex lens in present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(12) As shown in FIGS. 1 and 2, an optical lighting device includes an optical element 10, and a first light source 20 opposite to the optical element 10. The optical element 10 is a lens configured with a light incident surface 12, and a light emitting surface 14 opposite to the light incident surface 12. The first light source 20 deployed on one side of the optical element 10 opposite to the light incident surface 12.

(13) Noticeably, at least either of the light incident surface 12 or the light emitting surface 14 forms a first anamorphic asphere 30, and the first light source 20, square in shape, projects a beam into the light incident surface 12, a primary optical mode for beam directing into a lens, and transmits out of the light emitting surface 14; to be more specifically, the beam of the first light source refracts out from a first anamorphic asphere 30.

(14) As shown in FIG. 3, the first anamorphic sphere 30 is allowed to have a plurality aspherical condensers embodied in bilateral symmetry. The first anamorphic asphere 30 along with the relative X-Y-Z coordination satisfies the following formula:

(15) $z=\frac{c_x{x}^2+c_y{y}^2}{1+\sqrt{1-\left(1+k_x\right)c_x^2{x}^2-\left(1+k_y\right)c_y^2{y}^2}}+\underset{n=2}{\overset{10}{.Math.}}{A_{2n}\left[\left(1-B_{2n}\right)x^2+(1+B_{2n})y^2\right]}^n$

(16) Wherein A.sub.2n is a symmetry coefficient, B.sub.2n is an asymmetry coefficient, K.sub.x,K.sub.y are conic coefficients, and C.sub.x,C.sub.y are curvatures

(17) Besides, the first light source 20 is directed to the center 16 of the optical element 10 and their relative positions are given as an example in the figure and should not be seen as to limit the spirit and scope of the present invention.

(18) In FIG. 4, the optical element 10 further includes a second anamorphic asphere 32 connected to the first anamorphic asphere 30, and the X-Y-Z coordination of the second anamorphic asphere 32 satisfies the following formula:

(19) $z=\frac{c_x^{}{x}^2+c_y^{}{y}^2}{1+\sqrt{1-\left(1+k_x^{}\right)c_x^2{x}^2-\left(1+k_y^{}\right)c_y^2{y}^2}}+\underset{n=2}{\overset{10}{.Math.}}{A_{2n}^{}\left[\left(1-B_{2n}^{}\right)x^2+(1+B_{2n}^{})y^2\right]}^n$

(20) Wherein the A.sub.2n is a symmetry coefficient, B.sub.2n is asymmetry coefficient, K.sub.x, K.sub.y are conic coefficients, and C.sub.x,C.sub.y are curvatures.

(21) Noticeably, the first anamorphic sphere 30 and the second anamorphic sphere 32 occupy the same X-Y-Z coordination, wherein the first anamorphic sphere facing to the Y0 direction, while the other anamorphic sphere facing to the Y0 direction, and at least one coefficient has different value for configuring the first anamorphic sphere 30 and the second anamorphic sphere 32 among the symmetry coefficients, the asymmetry coefficients and the conic coefficients, such as A.sub.2n=A.sub.2n;B.sub.2n=B.sub.2n;C.sub.x=C.sub.x;K.sub.x=K.sub.x; C.sub.yC.sub.y;K.sub.yK.sub.y.

(22) Noticeably, the first anamorphic sphere 30 and the second anamorphic sphere 32 occupy the same X-Y-Z coordination, wherein the first anamorphic sphere facing to the Y0 direction, while the other anamorphic sphere facing to the Y0 direction, and at least one coefficient has different value for configuring the first anamorphic sphere 30 and the second anamorphic sphere 32 among the symmetry coefficients, the asymmetry coefficients and the conic coefficients, such as A.sub.2n=A.sub.2n;B.sub.2n=B.sub.2n;C.sub.x=C.sub.x;K.sub.x=K.sub.x; C.sub.yC.sub.y;K.sub.yK.sub.y

(23) FIG. 5 is a projection result by utilizing arrangement of the optical element 10 in an opposite position to a square light source (square LED) disclosed in aforementioned embodiment. A light distribution pattern 52 forms a wide spectrum area having a clear cut-off line 54 on its upper fringe as shown in the figure.

(24) Because the first light source 20 is a square shape and is accordingly given either the first anamorphic asphere 30 or the second anamorphic asphere 32 for the beam projecting into and the generated result of the light distribution pattern 52 is enlarged in width having a cut-off line 54 of spontaneous reflection.

(25) According to aforementioned embodiment, the present invention may be embodies as below.

(26) In FIGS. 4 and 6, the optical element 10 comprises that the first anamorphic sphere 30 connected to the second anamorphic sphere 32 with a curvatures differs from the second one, therefore when the light refracts out from the optical element 10 illuminated by the first light source 20 form an exposure area with different shapes on its upper and lower fringes.

(27) In FIG. 7, the embodiment includes at least one second light source 60 deployed on either sides of the optical element 10 opposite to the light incident surface 12 and aligned to the first light source 20. FIG. 8 is a light distribution pattern of a beam refracting out from the optical element 10 under a projection of the light source 20 and the second light source 60 which is prevalently enlarge in width than it is in FIG. 8.

(28) In FIG. 9, this embodiment includes a plurality of second light sources 60 arranged in a matrix formation with the first light source 20. FIG. 10 is still a light distribution pattern of the first light source 20 and the second light source 60 opposite to the optical element 10 in reference to the FIG. 9. The light distribution pattern is evidently wider in length and taller in height than it is in the FIGS. 5 and 6. Besides, each of the second light source 60 can be switched on/off by a suitable electronic circuit per the requirement.

(29) In FIGS. 1, 2 and 4, the optical element 10 is a lenticular lens having at least one asymmetry configuration on one side. In FIG. 11, the optical element 10 may as well be a Plano-convex lens deployed with a first anamorphic sphere or a second anamorphic sphere as mentioned before.

(30) This invention is configured with a single lens and a single light source which is capable of complying with the protocol of the bicycle lamp and illuminating effect. Therefore, it has merits of simplified structure and low manufacturing cost. Furthermore, as the devise of primary optical projection, the present invention can achieve the target of minimum elements requirement, a downsized volume and low light energy consumption.

(31) The abovementioned embodiments are only to exemplify, not limit, the technique and the performance of the present invention, and anyone skilled in the arts may alter or amend the embodiments per the circumstances without violating the principle and the spirit of the present invention. Therefore, the scope of right protection shall be as described claims later.