TWI491833B - Illumination apparatus used in vehicle - Google Patents

Description

Vehicle lighting device

The present invention relates to a lighting device, and more particularly to a lighting device for a vehicle.

The frequency of use of LED headlights has gradually increased with the trend of luminous efficiency and energy saving and environmental protection, especially the low beam with high frequency. The current cost of LED headlamps is high due to the demand for high wattage LEDs and large heat sinks. In general, the architecture used in current LED proximity lamps typically requires a shutter and is imaged through the lens to form a clear cut-off line to avoid glare to the incoming vehicle. However, because of the role of the shutter, the light-emitting diode near-light significantly reduces the efficiency of its light source, generally only about 60%.

U.S. Patent No. 5,757,557 discloses a lens body of a lighting device having a front surface, a forwardly expanding curved side wall, and a rear cylindrical recess. The beam that is transmitted to the rear is reflected by the curved side walls to form a collimated beam. This patent further discloses that the cavity includes a curved surface having a collimating function. U.S. Patent No. 7,470,402 discloses a light source structure in which an illuminating light source has a light guiding portion having a high refractive index. The central portion of the front surface of the light guiding portion is a circular direct exit region, the outer side is a total reflection area, and the back surface has a hemispherical concave portion. U.S. Patent No. 7,218, 853 discloses a light source structure in which the light-shielding member is in the form of a plate that blocks a portion of the light source from the front of the vehicle to define the light-dark boundary of the light beam incident on the lens. U.S. Patent No. 7,131,758 discloses a lamp structure that adjusts the angle of each light source and the transmissive cover to form the desired cut-off line. In addition, U.S. Patent No. 6,882,110 discloses a vehicle light structure that uses a plurality of lamp units to form various regions to synthesize a desired light intensity distribution.

The invention provides a lighting device for a vehicle, which has a high light utilization rate of a projected illumination beam.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

In order to achieve one or a part or all of the above or other objects, an embodiment of the present invention provides a lighting device for a vehicle for emitting light along an optical axis. The vehicular illumination device includes at least one illumination source and at least one collimating lens. The illumination source is used to provide an illumination beam. The collimating lens includes a first light transmitting surface, a second light transmitting surface, an inner surrounding surface, and an outer surrounding surface. The first light transmissive surface is for projecting the illumination beam out of the collimating lens. The illumination beam that projects the collimating lens is substantially distributed over a region of a reference line on a first reference plane at a first reference plane that intersects the optical axis at a point. The second light transmissive surface is disposed relative to the first light transmissive surface and is smaller than the first light transmissive surface, the second light transmissive surface being non-mirrored symmetric with respect to the second reference plane parallel to the optical axis. The inner surrounding surface is connected to the second light transmitting surface and defines an accommodating space together with the second light transmitting surface for accommodating the illumination source. The outer surrounding surface connects the inner surrounding surface with the first light transmitting surface, and the outer surrounding surface extends from the connection with the inner surrounding surface to the first light transmitting surface Zhang. The outer surrounding surface includes a plurality of light reflecting regions. Each light reflecting area is a continuous curved surface. There is at least one step between adjacent light reflecting regions.

In an embodiment of the invention, the light reflecting region includes a light-expanding region, and a portion of the illumination beam that acts through the light-expanding region, which projects a collimating lens and measures the light-shaped distribution on the first reference plane. The angle between the line below the reference line and a center point of the first light transmissive surface to an end point of the maximum width of the light shape in the direction of the parallel reference line is at least greater than a critical angle range.

In an embodiment of the invention, the light-expanding region includes a plurality of sub-diffusing regions, and a portion of the illumination beam that acts through the sub-diffusing regions projects a collimating lens and is measured on the first reference plane. The light distribution is distributed in a region below the reference line and a line connecting the center point of the first light transmitting surface to an end point of the maximum width of the light shape in the direction parallel to the reference line is larger than the critical angle range.

In an embodiment of the invention, the sub-light-diffusing regions are each a continuous curved surface, and each of the light-reflecting regions adjacent thereto has at least one step difference therebetween.

In an embodiment of the invention, the sub-light-diffusing region includes a first sub-diffusing region and a second sub-diffusing region, and a portion of the illumination beam that acts through the first sub-diffusing region projects a collimating lens And the light distribution measured on the first reference plane is distributed in a region below the reference line and the line connecting the center point of the first light transmitting surface to the end of the maximum width of the light shape in the direction of the parallel reference line The angle between the axes is a first angular range, and a portion of the illumination beam that acts through the second sub-diffusing region, which projects a collimating lens The angle between the line of the first light transmissive surface and the end point of the maximum width of the first light transmissive surface measured on the reference plane and the optical path in the direction of the parallel reference line is at an angle to the optical axis Is a second range of angles, wherein the second range of angles is greater than the first range of angles, and the first range of angles is greater than the range of critical angles.

In an embodiment of the invention, the light reflecting region further includes a light collecting region, and the partial illumination beam that acts through the light collecting region projects the collimating lens to measure the light shape on the first reference plane. The area of the line below the reference line and the line connecting the center point of the first light transmitting surface to the one end of the maximum width of the light shape in the direction of the parallel reference line is less than or equal to the critical angle range.

In an embodiment of the invention, the concentrating region includes a plurality of sub-concentrating regions, each of which is a continuous curved surface, and each of the light reflecting regions adjacent thereto has at least one step difference therebetween.

In an embodiment of the invention, the sub-concentrating regions are disposed opposite to both sides of the light-expanding region.

In an embodiment of the invention, the light reflecting region further includes at least one specific angle forming region, and the illumination beam acts on at least one specific angle forming region, and the light beam shape of the collimating lens is projected to be below the reference line. And the reference line is a broken line, including two straight lines intersecting and sandwiching a certain angle.

In an embodiment of the invention, the specific angle forming regions are each a continuous curved surface, and each of the light reflecting regions adjacent thereto has at least one step difference therebetween.

In an embodiment of the invention, the specific angle forming region is disposed on opposite sides of the light-expanding region, and is disposed on both sides of the second reference plane.

In an embodiment of the invention, a portion of the illumination beam that acts through the second light transmissive surface projects a collimating lens and the light shape measured on the first reference plane is distributed in a region below the reference line and The line connecting the center point of a light transmitting surface to an end point of the maximum width of the light shape in the direction parallel to the reference line is at least greater than a critical angle range from the optical axis.

In an embodiment of the invention, a portion of the illumination beam that acts through the second light transmissive surface projects a collimating lens and a light profile is measured on the first reference plane, the first light transmissive surface The line connecting the center point to the one end of the maximum width of the light shape in the direction parallel to the reference line is at a third angular range from the optical axis, and the third angle range is greater than the critical angle range.

In an embodiment of the invention, the second light transmitting surface is mirror symmetrical with respect to one of the third reference planes of the parallel optical axis, and the second reference plane is substantially perpendicular to the third reference plane.

In an embodiment of the invention, the second light transmitting surface is a continuous curved surface.

In an embodiment of the invention, the at least one illumination source is a plurality of illumination sources, and the at least one collimation lens is a plurality of collimating lenses, the collimating lenses are made of the same material and integrally formed into an inseparable lens structure. The illumination sources are correspondingly disposed in the accommodation spaces of the collimating lenses.

Based on the above, the illuminating device for a vehicle according to the present disclosure designs a curved surface shape of different regions on the outer surrounding surface based on the principle of total reflection and refraction, and has a gap between adjacent regions to obtain a diffused light shape at different angles. , Thereby, the illumination shape of the illumination beam projecting the illumination device of the vehicle is substantially distributed with a clear cut-off line, a specific focus area and a better light utilization ratio.

The above described features and advantages of the present invention will be more apparent from the following description.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

1 is a three-dimensional schematic view of a lighting device for a vehicle according to an embodiment of the present invention. 2A is a rear perspective view of the vehicular lighting device of FIG. 1 , and FIGS. 2B and 2C are cross-sectional views of the vehicular lighting device of FIG. 2A along section lines B2-B2 and C2-C2, respectively. Referring to FIGS. 1 to 2C , the vehicular illumination device 100 of the present embodiment includes an illumination source 110 and a collimating lens 120 . It should be noted that, in order to clearly illustrate the collimating lens 120 of the present embodiment, FIG. 1 and FIG. 2A do not show that the illumination light source 110 is disposed in the accommodating space S of the collimating lens 120.

In the present embodiment, the collimating lens 120 is used to project the illumination beam provided by the illumination source 110 through the first light transmitting surface S122 to the collimating lens 120. Specifically, the collimator lens 120 includes a first light transmitting surface S122, a second light transmitting surface S124, an inner surrounding surface S126, and an outer surrounding surface S128. The first light transmitting surface S122, the second light transmitting surface S124, the inner surrounding surface S126, and the outer surrounding surface S128 collectively define an outer contour of the collimating lens 120, and the second light transmitting surface S124 is smaller than the first light transmitting surface S122. In the present embodiment, the first light transmitting surface S122 is used to project the illumination beam out of the collimating lens 120. The second light transmitting surface S124 is disposed with respect to the first light transmitting surface S122. The second light transmitting surface S124 is non-mirror symmetrical with respect to the second reference plane r2 of the parallel optical axis O, that is, vertically distorted, and the third reference plane r3 with respect to the parallel optical axis O is mirror symmetrical, that is, bilaterally symmetrical. In this example, the optical axis O extends in the Y direction, the third reference plane r3 is parallel to the Z direction, and the second reference plane r2 is parallel to the X direction.

Then, in the embodiment, the inner surrounding surface S126 and the second light transmitting surface S124 define an accommodating space S for accommodating the illumination light source 110. The outer surrounding surface S128 connects the inner surrounding surface S126 with the first light transmitting surface S122, and the outer surrounding surface S128 expands from the junction with the inner surrounding surface S126 toward the first light transmitting surface S122. The expansion here means, for example, that the outer surrounding surface S128 extends from the opening of the accommodating space S to the first light transmitting surface S122, and the projected area of the opening on the first light transmitting surface S122 is smaller than the area of the first light transmitting surface S122. . In other words, the outer surrounding surface S128 is expanded from the opening of the accommodating space S along the direction D to the first light transmitting surface S122.

Therefore, in the present embodiment, the illumination beam emitted by the illumination source 110 is transmitted inside the collimator lens 120 based on the total reflection and refraction principle, and is incident on the collimator lens via the second light transmission surface S124 and the inner surrounding surface S126. Inside the 120, the collimating lens 120 is then projected along the optical axis O via the first light transmitting surface S222. The illumination beam is transmitted inside the collimating lens 120 At the time, some or all of the illumination beam will be reflected or totally reflected by the outer surrounding surface S128.

The illumination beam projected by the collimating lens 120 is substantially distributed over a reference line located on the first reference plane r1 at a first reference plane r1 intersecting the optical axis O at a point on a first reference plane r1. The area on one side of the RA. 1 shows an example in which the first reference plane r1 is perpendicular to the optical axis O, the reference line RA is a horizontal line, and the optical shape OF is below the reference line RA, but the invention is not limited thereto, and in other embodiments. The first reference plane r1 may not be perpendicular to the optical axis O, the reference line RA is a vertical line or any other polygonal line segment or curve, and the optical shape OF is in one of the regions of the reference line RA.

Based on at least the structural aspect of the collimating lens 120 described above, the present embodiment further designs different regions of the outer surrounding surface S128 to have different curved shapes to obtain diffused light shapes at different angles.

FIG. 3 is a schematic diagram showing the surrounding surface S128 outside the embodiment. Referring to FIG. 3, the outer surrounding surface S128 of the present embodiment includes a plurality of light reflecting regions. Each of the light reflecting regions is a continuous curved surface, and a gap is formed between the adjacent light reflecting regions to adaptively adjust the light shape of the illumination beam. According to the different influences of the light reflection regions on the light shape of the illumination beam that projects the collimator lens, the light diffusion region S310 and the light collection region S320 can be roughly divided into the following.

FIG. 4A is a schematic diagram showing the light-expanding area S310 of the embodiment. FIG. 4B is a schematic rear view of the light-expanding region S310 of the embodiment. 4C is a cross-sectional view of the light-expanding region of FIG. 4B along a section line B4-B4. 4D is a cross-sectional view of the light-expanding region of FIG. 4B along a section line A4-A4. 4E is a top plan view of the light-expanding region of FIG. 4B. 4F is a side view showing the light-expanding region of FIG. 4B. 4G is a cross-sectional view of the light-expanding region of FIG. 4F along a section line E4-E4. 4H is a cross-sectional view of the light-expanding region of FIG. 4F along a section line D4-D4. Referring to FIG. 4A to FIG. 4H, the light-expanding region S310 of the present embodiment includes a plurality of sub-diffusing regions, such as a first sub-diffusing region S312 and a second sub-diffusing region S314. The first sub-diffusing region S312 and the second sub-diffusing region S314 are respectively a continuous curved surface, and there is a gap between each of the adjacent light reflecting regions. For example, referring to FIG. 3, the first sub-light-diffusing region S312 of the present embodiment has a difference between the two sub-regions S322 and S324 of the concentrating region S320. Similarly, the second sub-light-expanding region S314 also has a gap between the light-reflecting regions adjacent to the two sides. Further, how the sub-light-expanding regions affect the light shape of the illumination beam projecting the collimating lens will be further explained below.

Referring to FIGS. 1 and 2C, a portion of the illumination beam projects the collimator lens 120, and the optical shape OF measured on the first reference plane r1 is distributed in a region below the horizontal reference line RA and the first light transmission surface S122. The angle θ C between the line from the center point to the end point P1 or P2 of the maximum width in the direction of the parallel horizontal reference line RA and the optical axis O is defined as the horizontal diffusion angle. Please refer to FIG. 11 first. The intersection of the axis O with the first reference plane r1 and the reference line RA is defined as a horizontal diffusion angle θ C equal to 0 degrees, a right angle to the right, and a negative angle to the left.

The illumination beam of the present embodiment, through the action of the first sub-light-expanding region S312, projects the light-shaped distribution of the illumination beam of the collimating lens 120 below the horizontal reference line RA and the horizontal diffusion angle θ C is first and minus 15 degrees. The area between the angular range R θ 1 . The illumination beam passes through the second sub-light-expanding region S314, and the light-shaped distribution of the illumination beam of the collimating lens 120 is projected below the horizontal reference line RA and the horizontal diffusion angle θ C is in the second angular range R θ of plus or minus 20 degrees. The area between 2. It should be noted that the first angle range R θ 1 and the second angle range R θ 2 are exemplified by plus or minus 15 degrees and plus or minus 20 degrees, respectively, and the numerical values and signs of the two are not intended to limit the present invention. In other words, the illumination beam of the present embodiment acts through each sub-diffusing region, the light profile of which is below the reference line and is interposed between the corresponding horizontal diffusion angles θ C .

In the present embodiment, the illumination beam is also diffused under the action of the second light transmission surface S124, and is distributed in a region where the horizontal diffusion angle θ C is in the third angular range R θ 3 . FIG. 5 is a schematic diagram showing the second light transmitting surface of the embodiment viewed from another viewing angle, and FIG. 6 is a schematic cross-sectional view corresponding to the second light transmitting surface of FIG. 5. Referring to FIG. 5 to FIG. 6 , the second light transmitting surface S124 of the embodiment can be roughly divided into a plurality of curved surfaces having different curvatures, for example, six in FIG. 5 . In FIG. 6, the dotted line shows the curved surface profile of the second light transmitting surface S124 along its center line (ie, the third reference plane), and the solid line is drawn by the second light transmitting surface S124 along its edge. The contour of the surface of the side line. It should be noted that although the second light transmitting surface S124 of the embodiment can be divided into a plurality of curved surfaces having different curvatures, the second light transmitting surface S124 formed by the curved surfaces of different curvatures is a continuous curved surface. There are no gaps between surfaces of different curvatures. In addition, in order to clearly show the second light transmitting surface S124, FIG. 5 does not show the difference existing between the other surfaces.

At least the curvature of the plurality of curved surfaces constituting the second light transmitting surface S124 is adjusted by the curved surface design of the second light transmitting surface S124, and the illumination beam of the embodiment is projected by the second light transmitting surface S124 to collimate The light profile of the illumination beam of the lens 120 is distributed below the horizontal reference line RA and the horizontal diffusion angle θ C is between the third angular range R θ 3 of plus or minus 40 degrees. It should be noted that although the third angular range R θ 3 is exemplified by plus or minus 40 degrees, the numerical values and signs are not intended to limit the present invention.

In an embodiment, the illumination beam is diffused under the action of the first sub-diffusing region S312, the second sub-diffusing region S314, and the second light-transmitting surface S124, that is, the light is diffused. The area, and the definition of the light expansion of the present embodiment is mainly defined by the horizontal diffusion angle θ C . When the illumination beam passes through the light reflection region of the collimating lens 120, and the horizontal diffusion angle θ C of the light distribution on the first reference plane r1 is greater than plus or minus 5 degrees, then each of the light reflection regions is defined as a light-expanding region. And define positive and negative 5 degrees as the critical angle. However, the value of this critical angle range R θ t is not intended to limit the invention. In this embodiment, when the light shape of the illumination beam projecting the collimating lens is adjusted to be below the horizontal reference line RA by the respective light-expanding regions, the light intensity above the horizontal reference line RA is weakened, and a clear shape can be formed. Cut-off line.

On the other hand, in addition to the light-expanding region, the surrounding surface S128 of the present embodiment also includes a light collecting region S320. FIG. 7 is a schematic diagram showing the concentrating area S320 of the embodiment. FIG. 8 is a schematic perspective view of the sub-concentrating area S324. Referring to FIG. 7 and FIG. 8 , the concentrating area S320 of the embodiment includes multiple sub-sub-sections. Condensation areas S322, S324, S326, S328. In this example, the sub-concentrating regions S322 and S324 are respectively disposed on opposite sides of the first sub-light-expanding region S312, and the sub-light-collecting regions S326 and S328 are respectively disposed on opposite sides of the second sub-light-expanding region S314. In this embodiment, each of the sub-concentrating regions is a continuous curved surface, and there is a gap between each of the adjacent light reflecting regions. For example, referring to FIG. 3 at the same time, the sub-concentrating regions S322 and S324 of the present embodiment have a gap at the junction with the first sub-light-expanding region S312, for example. Similarly, the sub-concentrating regions S326, S328 have, for example, a gap at the junction with the second sub-diffusing region S314, respectively. Further, how the sub-concentrating regions affect the light shape of the illumination beam projecting the collimating lens 120 will be further explained below.

The sub-light collecting area S324 is taken as an example. Referring to FIG. 8, the illumination beam of the present embodiment is projected by the sub-concentrating region S324, and the light beam of the illumination beam projected by the collimating lens 120 is distributed below the horizontal reference line RA and the horizontal diffusion angle θ C is between plus and minus 5 degrees. The critical angle range is the area between R θ t . It should be noted that although the critical angle range R θ t is exemplified by plus or minus 5 degrees, the numerical values are not intended to limit the present invention. In other words, the illumination beam of the present embodiment acts through each sub-concentrating region, and its light-shaped distribution is below the horizontal reference line RA and the horizontal diffusion angle θ C is less than or equal to the critical angle range R θ t, which is the embodiment. The definition of spotlight. That is, when the illumination beam acts through each sub-concentrating region, and the light distribution of the collimating lens 120 is projected below the reference line RA and the horizontal diffusion angle θ C is less than or equal to the critical angle range R θ t, then each The light reflection area is a condensed area.

In summary, in the present embodiment, after the illumination beam passes through the plurality of light reflecting regions and the second light transmitting surface of the outer surrounding surface, the light shape is substantially distributed in a region below the reference line RA. The light distribution of the embodiment can be applied to the illumination of the vehicle, at least in accordance with the UN ECE Regulation issued by the Economic Commission of Europe (ECE), which stipulates the near-light of the illumination device for the vehicle. The design must at least meet the criteria for the main illumination profile to be distributed below the horizontal cut-off line. The definition coefficient of the cut-off line is defined as G, and the definition coefficient G is determined by the vertical scanning through the horizontal section of the cut-off line at the VV line to 2.5 degrees: G=(log Eβ-log E(β+ 0.1°))

Where E is the actual measured value, the unit is lx; β is the position in the vertical direction, and the unit is the angle. The G value should be not less than 0.13 (minimum sharpness factor) and not more than 0.40 (maximum sharpness factor). Detailed test details are found in the UN ECE Regulation and are not described here.

In addition, the UN ECE Regulation further stipulates that the illumination light shape of the vehicle lighting device exceeds the horizontal cut-off line, and the angle between the boundary and the horizontal cut-off line cannot exceed 15 degrees, which is further explained below.

FIG. 9A is a schematic diagram showing the outer surrounding surface S728 according to another embodiment of the present invention. FIG. 9B is a schematic diagram showing the surrounding surface of FIG. 9A viewed from different angles. FIG. 10 is a rear view of a specific angle forming region S830.

Referring to FIG. 9A to FIG. 10, the outer surrounding surface S728 of the present embodiment further includes specific angle forming regions S830, S840. In this case, a specific angle The formation regions S830, S840 are disposed with respect to both sides of the light diffusion region S810, and are disposed on both sides of the second reference plane r2. In this embodiment, each of the specific angle forming regions is a continuous curved surface, and there is a gap between each of the light reflecting regions adjacent thereto. For example, the specific angle forming region S830 of the present embodiment has, for example, at least a gap at the junction with the first sub-light-diffusing region S812 and at the junction with the sub-light-collecting region S824, respectively. Similarly, the specific angle forming region S840 has, for example, at least a gap at the junction with the second sub-light-diffusing region S814 and at the junction with the sub-light-collecting region S826, respectively. That is to say, the specific angle forming regions S830, S840 each have a gap between the light reflecting regions adjacent thereto. The bottom section further illustrates how each particular angle forming region affects the light profile of the illumination beam.

FIG. 11 is a schematic diagram showing the light shape of the illumination beam projecting the collimating lens 120 on the first reference plane r1 by the specific angle forming regions S830 and S840. Referring to FIG. 9A to FIG. 11 , the illumination beam of the embodiment passes through the specific angle forming regions S830 and S840 , and the light beam of the illumination beam projected by the collimating lens 120 is distributed below the reference line RA, and the reference line RA is a broken line. The line segments HL and SL intersecting and sandwiching a specific angle θ, wherein HL is a horizontal cut-off line, and SL is a diagonal cut-off line whose light shape exceeds the horizontal cut-off line HL. As shown in Figure 11. At least in order to comply with the UN ECE Regulation, the specific angle θ of this example is 15 degrees. That is to say, after the illumination beam of the embodiment passes through the specific angle forming regions S830 and S840, the portion of the light shape exceeding the horizontal cut-off line has an angle between the boundary and the horizontal cut-off line HL of not more than 15 degrees. In the present embodiment, the light generated by the specific angle forming regions S830, S840 The shape also belongs to one of the diffused light shapes, and further produces a light-shaped distribution of 15 degrees above the horizontal cut-off line HL. Referring to FIG. 10 again, a specific angle forming region S830 is taken as an example, the curved surface thereof is left-right asymmetrical, and when the curved surface is adjusted, the specific angle forming region S830 may be divided into a plurality of different manners by referring to the adjusting manners of FIGS. 5 and 6 . The curved surface of the curvature is, for example, six in FIG. 10, and each of the broken lines is rotated by 15 degrees to the reference axis RL, and then the respective curved surfaces of the region S830 are taken to perform light expansion adjustment. It should be noted that the specific angles herein are exemplified by 15 degrees, but the numerical values thereof are not intended to limit the present invention.

FIG. 12 is a schematic diagram showing the light shape of the collimating lens 120 projected by the illumination beam through the outer surrounding surface S728. As shown in FIG. 12, after the illumination beam passes through the plurality of light reflection regions surrounding the surface S728 and the second light transmission surface S724 outside the embodiment, the light shape on the first reference plane r1 is substantially distributed in the reference. Below the line RA, the reference line RA includes a horizontal cut-off line HL and a diagonal cut-off line SL, and the angle between the horizontal cut-off line HL and the oblique cut-off line SL does not exceed 15 degrees. Therefore, the light distribution can make the lighting device of the embodiment apply to the illumination of the vehicle, at least in compliance with the regulatory standards stipulated by the UN ECE Regulation. In detail, in one of the embodiments, in the measurement standard specified by the UN ECE Regulation, the light shape of the projection collimating lens 120 is located above the reference line RA, that is, at the horizontal cut-off line HL and the oblique cut-off line SL. The light intensity on it is almost zero. The method of measuring the horizontal diffusion angle mentioned in one of the embodiments is as specified in the UN ECE Regulation.

At least in order to provide the illumination light shape exemplified in the above embodiments, the disclosure There is a gap between the light reflecting regions of the outer surrounding surface, and the above-mentioned gaps are further explained below.

Figure 13 is a partially enlarged schematic view showing the surrounding surface of an embodiment of the present invention. Referring to FIG. 3 and FIG. 13 , taking the outer surrounding surface S128 of FIG. 3 as an example, each light reflecting area of the outer surrounding surface S128 is a continuous curved surface, and there is a gap between adjacent light reflecting areas. The step W of Fig. 13 is that the curved surfaces of the two adjacent light reflecting regions are discontinuous, and there is a height difference.

From another point of view, FIG. 14A is a schematic diagram showing the difference between the sub-light-diffusing region S312 of FIG. 3 and the adjacent light-reflecting region, and FIG. 14B is a partially enlarged schematic view of the surrounding area of the broken line in FIG. 14A. Referring to FIG. 3, FIG. 14A and FIG. 14B, in the present embodiment, taking the sub-light-diffusing region S312 of FIG. 3 as an example, each of the sub-light-concentrating regions S322 and S324 has a gap with its adjacent light-reflecting region, for example, There is a gap W between the light-expanding region S312 and the sub-light-collecting region S324. As shown in FIG. 14A and FIG. 14B, in order to individually adjust the optical effects of the individual light-reflecting regions, a gap between the respective light-reflecting regions is generated, according to the adjustment. As a result, FIG. 14B shows that the illumination beam BL is reflected by the sub-diffusing region S312 and then the collimator lens 120 is projected in the Y direction.

15A is a cross-sectional view of the collimating lens 120 of FIG. 2A along section line B2-B2. FIG. 15B is a partial side elevational view showing the collimating lens 120 corresponding to the dotted line in FIG. 15A. 16A is a cross-sectional view of the collimating lens 120 of FIG. 2A along a section line C2-C2. FIG. 16B is a partial side elevational enlarged view of the collimating lens 120 corresponding to the dashed line in FIG. 16A.

Please refer to FIG. 2A and FIG. 15A to FIG. 16B, from the vertical direction, The light reflecting area S152 is represented as a surface before the adjustment by the light shape requirement, and the light path of the illumination light beam BL projected the collimating lens still cannot be distributed under the horizontal reference line. The light reflection region S152 is adjusted by dividing into a plurality of curved surfaces as needed. Here, the light reflection regions S150 and S154 are taken as an example. The light reflecting regions S150 and S154 adjust the curvature according to the light shape requirement, and control the transmission direction of the illumination light beam BL to be upward or downward. The illumination beam BL is collimated into the illumination beam BL' by the segmentally adjusted light reflecting regions S150, S154, and the illumination beam BL' projects the light shape of the collimating lens below the horizontal reference line. Similarly, from the horizontal direction, the light reflecting area S162 is represented as the surface before the adjustment by the light shape requirement, and the light path of the illumination beam BL projects the light shape of the collimating lens, and the desired horizontal diffusion cannot be achieved. Angle distribution. The light reflection region S162 is adjusted by dividing into a plurality of curved surfaces as needed. Here, the light reflection regions S160 and S164 are taken as an example. The light reflecting regions S160 and S164 adjust the curvature according to the light shape requirement, and control the transmission direction of the illumination light beam BL to be close to the optical axis or away from the optical axis. By adjusting the light reflecting regions S160, S164 in sections, the illumination beam BL can be adjusted to the illumination beam BL' according to the light shape requirement, and the illumination beam BL' projects the light distribution of the collimating lens at a desired horizontal diffusion angle.

In summary, the illuminating device for a vehicle provided by the present disclosure does not need to be coated with a high reflectivity film layer, and is designed for the outer surrounding surface through the principle of total reflection and refraction so that the outer surrounding surface includes regions of different curved shapes. And to make the gap between the regions to meet the needs of different diffusion angles. In addition, the light shape of the collimating lens projected by the illumination beam through different regions has been disclosed as above, and the result shows that the vehicle lighting device provided by the disclosure discloses At least it can meet the standard of the vehicle's near-light shape.

From the embodiment disclosed in FIG. 3 and FIG. 9A, the illuminating device for a vehicle is viewed from a rear view angle, that is, viewed from the -Y direction to the +Y direction, and the outline of the collimating lens is substantially circular. Curve, but the invention is not limited thereto. FIG. 17A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG. 17B is a rear schematic view of the collimating lens of FIG. 17A. 17C is a cross-sectional view of the collimating lens of FIG. 17A along section line B17-B17. 17D is a cross-sectional view of the collimating lens of FIG. 17A along section line C17-C17. The illuminating device for a vehicle of this embodiment is viewed from a rear view angle, and the outline of the collimating lens is substantially a curve similar to a quadrangle. It is worth mentioning that such a structural design can also be applied to the illuminating device of the locomotive. At this time, the illuminating device of the locomotive may not include the forming regions S830, S840 which provide a specific angle light shape. In other words, the illuminating device for a vehicle of the present disclosure can selectively design whether the outer surrounding surface includes a specific angle forming area or a specific angle forming position of the area depending on the application. For example, in a lighting application for a locomotive, the vehicular lighting device may not include a particular angle forming area. In a left-handed automotive lighting application, the design of the particular angle forming region of the automotive lighting device can be, for example, the design aspect disclosed in FIG. 9A. In the right-hand car lighting application, the design of the specific angle forming area of the vehicle lighting device can be adaptively adjusted to meet the standards set by other regulations.

Depending on the application, the vehicular illumination device according to an embodiment of the present invention may also include a plurality of illumination sources and a plurality of collimating lenses, and the collimating lenses are made of the same material and integrally formed into an inseparable lens structure. Figure 18 FIG. 20 illustrates an embodiment in which the vehicle lighting device includes different numbers of illumination sources and collimating lenses, respectively. FIG. 18A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG. 18B is a rear schematic view of the collimating lens of FIG. 18A. 18C is a cross-sectional view of the collimating lens of FIG. 18A along section line B27-B27. 18D is a cross-sectional view of the collimating lens of FIG. 18A along section line C27-C27. FIG. 19A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG. 19B is a rear perspective view of the collimating lens of FIG. 19A. 19C is a cross-sectional view of the collimating lens of FIG. 19A along section line B37-B37. 19D is a cross-sectional view of the collimating lens of FIG. 19A along section line C37-C37. FIG. 20A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG. 20B is a rear perspective view of the collimating lens of FIG. 20A. 20C is a cross-sectional view of the collimating lens of FIG. 20A along section line B47-B47. Figure 20D is a cross-sectional view of the collimating lens of Figure 20A taken along section line C47-C47. The illuminating light source is disposed in the accommodating space of the collimating lens. In order to clearly illustrate such an embodiment, the illuminating light source is disposed in the accommodating space of the collimating lens. In addition, the vehicular illumination device having a plurality of collimating lenses may further include a substrate for arranging the collimating lens. For example, the vehicle lighting devices 1800, 1900, 2000 respectively include a substrate 1830, 1930, 2030 for providing a plurality of collimating lenses. Further, each of the light reflecting regions on the indivisible lens structure is a continuous curved surface, and each has at least one difference between the adjacent light reflecting regions, and the illumination beams of the plurality of illumination sources pass through the lights. After the reflection area is refracted, the illumination beam projecting the lens structure still conforms to the UN ECE Regulation.

In summary, in the illuminating device for a vehicle of the present disclosure, the outer surrounding surface includes regions of different curved shapes and a gap between adjacent regions. By this design, the illumination beam can obtain the diffused light shape of different angles under the action of the collimating lens, so that the light shape of the illumination beam projected by the vehicle illumination device is substantially distributed with a clear cut-off line and a specific focus area. With better light utilization.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. In addition, the terms "first", "second" and the like mentioned in the specification or the scope of the claims are only used to name the elements or distinguish different embodiments or ranges, and are not intended to limit the number of elements. Upper or lower limit.

100, 1700, 1800, 1900, 2000‧‧‧ Vehicle lighting devices

110‧‧‧Light source

120‧‧‧ Collimating lens

1830, 1930, 2030‧‧‧ substrates

S122, S722‧‧‧ first light transmission surface

S124, S724‧‧‧second light transmission surface

Surrounded by S126‧‧

S128‧‧‧ outer surround

S150, S160‧‧‧Light reflection area

Curve between S152, S154, S162, S164‧‧ ‧

S830, S840‧‧‧Specific angle forming area

S310, S810‧‧‧ diffused area

S312, S812‧‧‧ first sub-diffusing area

S314, S814‧‧‧Second sub-diffusion area

S320, S820‧‧‧ concentrating area

S322, S324, S326, S328, S822, S824, S826, S828‧‧‧ sub-concentrating area

HL‧‧‧ level cut-off line

BL, BL’‧‧‧ illumination beam

OF‧‧‧Light shape

P1, P2‧‧‧ endpoint

R1‧‧‧ first reference plane

R2‧‧‧second reference plane

R3‧‧‧ third reference plane

RL‧‧‧ reference axis

RA‧‧‧ reference line

SL‧‧‧ oblique cut-off line

O‧‧‧ optical axis

S‧‧‧ accommodating space

D‧‧‧Expansion direction

W‧‧‧断差

θ C‧‧‧ horizontal diffusion angle

R θ t‧‧‧critical angle range

R θ 1‧‧‧ first angle range

R θ 2‧‧‧second angle range

R θ 3‧‧‧ third angle range

A4-A4, B2-B2, B4-B4, B17-B17, B27-B27, B37-B37, B47-B47, C2-C2, C17-C17, C27-C27, C37-C37, C47-C47, D4- D4, E4-E4‧‧‧ hatching

1 is a three-dimensional schematic view of a lighting device for a vehicle according to an embodiment of the present invention.

2A is a rear view of the lighting device for a vehicle of FIG. 1.

2B is a cross-sectional view of the vehicular illumination device of FIG. 2A taken along section line B2-B2.

2C illustrates the illuminating device for a vehicle of FIG. 2A along a section line C2-C2 Schematic diagram of the section.

FIG. 3 is a schematic diagram showing the surrounding surface S128 outside the embodiment.

FIG. 4A is a schematic diagram showing the light-expanding area S310 of the embodiment.

FIG. 4B is a schematic rear view of the light-expanding region S310 of the embodiment.

4C is a cross-sectional view of the light-expanding region of FIG. 4B along a section line B4-B4.

4D is a cross-sectional view of the light-expanding region of FIG. 4B along a section line A4-A4.

4E is a top plan view of the light-expanding region of FIG. 4B.

4F is a side view showing the light-expanding region of FIG. 4B.

4G is a cross-sectional view of the light-expanding region of FIG. 4F along a section line E4-E4.

4H is a cross-sectional view of the light-expanding region of FIG. 4F along a section line D4-D4.

FIG. 5 is a schematic diagram showing the second light transmitting surface of the embodiment as viewed from another perspective.

6 is a cross-sectional view corresponding to the second light transmitting surface of FIG. 5.

FIG. 7 is a schematic diagram showing the concentrating area S320 of the embodiment.

FIG. 8 is a schematic perspective view of the sub-concentrating area S324.

FIG. 9A is a schematic diagram showing the outer surrounding surface S728 according to another embodiment of the present invention.

FIG. 9B is a schematic diagram showing the surrounding surface S728 of FIG. 9A viewed from different angles.

FIG. 10 is a rear view of a specific angle forming region S830.

FIG. 11 is a schematic view showing the light shape of the illumination beam projecting the collimating lens by the specific angle forming regions S830 and S840.

FIG. 12 is a schematic diagram showing the light shape of the collimating lens projected by the illumination beam through the outer surrounding surface S728.

Figure 13 is a partially enlarged schematic view showing the surrounding surface of an embodiment of the present invention.

FIG. 14A is a schematic diagram showing the difference between the sub-light-diffusing region S312 of FIG. 3 and its adjacent light-reflecting region.

FIG. 14B is a partially enlarged schematic view showing the area enclosed by the broken line in FIG. 14A.

15A is a cross-sectional view of the collimating lens of FIG. 2A along section line B2-B2.

FIG. 15B is a partial side elevational view showing the collimating lens corresponding to the dotted line in FIG. 15A. FIG.

16A is a cross-sectional view of the collimating lens of FIG. 2A along a section line C2-C2.

FIG. 16B is a partial side elevational view showing the collimating lens corresponding to the dotted line in FIG. 16A. FIG.

FIG. 17A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG.

17B is a rear schematic view of the collimating lens of FIG. 17A.

17C is a cross-sectional view of the collimating lens of FIG. 17A along section line B17-B17.

Figure 17D illustrates the collimating lens of Figure 17A along section line C17-C17 Schematic diagram of the section.

FIG. 18A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG.

18B is a rear schematic view of the collimating lens of FIG. 18A.

18C is a cross-sectional view of the collimating lens of FIG. 18A along section line B27-B27.

18D is a cross-sectional view of the collimating lens of FIG. 18A along section line C27-C27.

FIG. 19A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG.

19B is a rear perspective view of the collimating lens of FIG. 19A.

19C is a cross-sectional view of the collimating lens of FIG. 19A along section line B37-B37.

19D is a cross-sectional view of the collimating lens of FIG. 19A along section line C37-C37.

FIG. 20A is a three-dimensional schematic diagram of a lighting device for a vehicle according to another embodiment of the present invention. FIG.

FIG. 20B is a rear view of the collimating lens of 20A.

20C is a cross-sectional view of the collimating lens of FIG. 20A along section line B47-B47.

Figure 20D is a cross-sectional view of the collimating lens of Figure 20A taken along section line C47-C47.

100‧‧‧Car lighting

120‧‧‧ Collimating lens

S‧‧‧ accommodating space

OF‧‧‧Light shape

P1, P2‧‧‧ endpoint

R1‧‧‧ first reference plane

R2‧‧‧second reference plane

R3‧‧‧ third reference plane

RA‧‧‧ reference line

X‧‧‧X axis

Y‧‧‧Y axis

Z‧‧‧Z axis

Claims (16)

A vehicular illumination device for illuminating along an optical axis, the vehicular illumination device comprising: at least one illumination source for providing an illumination beam; and at least one collimating lens comprising: a first light transmissive surface, For projecting the illumination beam out of the collimating lens, wherein the illumination beam projected from the collimating lens is substantially distributed on a side of one of the reference lines on a first reference plane And the first reference plane intersects the optical axis at a point, the reference line is located on the first reference plane; a second light transmissive surface is disposed relative to the first light transmissive surface and smaller than the first light transmissive surface The second light transmitting surface is non-mirrored symmetric with respect to a second reference plane parallel to the optical axis; an inner surrounding surface connecting the second light transmitting surface and defining an accommodation together with the second light transmitting surface a space for accommodating the illumination source; and an outer surrounding surface connecting the inner surrounding surface and the first light transmitting surface, and the first light transmitting surface from the junction of the outer surrounding surface and the inner surrounding surface Expansion, where the outer surround The light reflecting region includes a continuous curved surface, and the adjacent light reflecting regions have at least one gap between the light reflecting regions, and the light reflecting regions include a light diffusing region and a light collecting region. . The illuminating device for a vehicle according to claim 1, wherein a portion of the illumination beam that acts through the light-expanding region, which projects the collimating lens, and the light shape measured on the first reference plane is distributed in a region below the reference line, and the first light-transmitting surface The line connecting a center point to an end point of the light shape and the optical axis is at least greater than a critical angle range, and the end point is located at a maximum width of the light shape in a direction parallel to the reference line. The illuminating device for a vehicle of claim 2, wherein the light-expanding region comprises a plurality of sub-light-diffusing regions, and the portion of the illumination light beam that acts through the sub-light-expanding regions projects the collimating lens The light shape measured on the first reference plane is distributed in a region below the reference line, and the line connecting the center point of the first light transmitting surface to the end point of the light shape and the optical axis Greater than the critical angle range. The vehicle lighting device of claim 3, wherein the sub-light-expanding regions are each a continuous curved surface, and each of the light reflecting regions adjacent thereto has the at least one step. The illuminating device for a vehicle of claim 3, wherein the sub-light-diffusing regions comprise a first sub-light-diffusing region and a second sub-diffusing region, and the portion acting through the first sub-diffusing region The illumination beam, which projects the collimating lens and the light shape measured on the first reference plane is distributed in a region below the reference line, and the center point of the first light transmitting surface to the light shape The angle between the line connecting the end point and the optical axis is a first angular range, and a portion of the illumination beam that acts through the second sub-diffusing region projects the collimating lens at the first reference plane The measured light shape is distributed in a region below the reference line, and the middle of the first light transmitting surface The angle between the point of the heart point and the end point of the light shape and the optical axis is a second angular range, wherein the second angle range is greater than the first angle range, and the first angle range is greater than the critical angle range . The vehicular illumination device of claim 2, wherein a portion of the illumination beam that acts through the concentrating region projects the collimating lens and the light shape measured on the first reference plane An area distributed below the reference line, and an angle between the line connecting the center point of the first light transmitting surface and the end point of the light shape to the optical axis is less than or equal to the critical angle range. The illuminating device for a vehicle of claim 6, wherein the concentrating area comprises a plurality of sub-concentrating areas, each of the sub-concentrating areas is a continuous curved surface, and each of the light reflecting areas adjacent thereto There is at least one difference between the two. The vehicle lighting device of claim 7, wherein the sub-concentrating regions are disposed opposite to both sides of the light-expanding region. The illuminating device for a vehicle of claim 2, wherein the light reflecting regions further comprise at least one specific angle forming region, the illumination beam acting through the at least one specific angle forming region, and projecting the collimation The light shape of the lens is distributed in a region below the reference line, and the reference line is a broken line, including two straight lines intersecting and sandwiching a specific angle. The vehicular illumination device of claim 9, wherein the specific angle forming regions are each a continuous curved surface, and each of the light reflecting regions adjacent thereto has the at least one step. A lighting device for a vehicle according to claim 9 of the patent application, The specific angle forming regions are disposed on opposite sides of the light-expanding region, and are disposed on both sides of the second reference plane. The vehicular illumination device of claim 1, wherein a portion of the illumination beam that acts through the second light transmissive surface projects the collimating lens and is measured on the first reference plane. The light shape is distributed in a region below the reference line, and a line connecting the center point of the first light transmitting surface to an end point of the light shape and the optical axis is at least greater than a critical angle range, and the end point is located The light shape is at a maximum width obtained in a direction parallel to the reference line. The vehicular illumination device of claim 12, wherein the portion of the illumination beam that acts through the second light transmissive surface projects the collimating lens and is measured on the first reference plane a light distribution, the angle between the line connecting the center point of the first light transmitting surface and the end point of the light shape and the optical axis is a third angle range, and the third angle range is greater than the critical angle range . The vehicular illumination device of claim 1, wherein the second light transmitting surface is mirror symmetrical with respect to a third reference plane of the optical axis, and the second reference plane and the third reference plane Essentially vertical. The vehicular lighting device of claim 1, wherein the second light transmitting surface is a continuous curved surface. The vehicle lighting device of claim 1, wherein the at least one illumination source is a plurality of illumination sources, and the at least one collimation lens is a plurality of collimating lenses, the collimating lenses being the same material and integrated Formed as An inseparable lens structure, the illumination sources are correspondingly disposed in the accommodating spaces of the collimating lenses.