TW202338257A - Virtual focus side-beam vehicle lamp device capable of concentrating light in an effective light distribution area - Google Patents

Abstract

A virtual focus side-beam vehicle lamp device includes a substrate unit, a light-emitting unit, and a light guide element. The light-emitting unit is arranged on the base unit and is configured to project light to the left. The light guide element includes a light-transmitting part and a light reflecting part arranged in tandem, and a light incident part connected between the light-transmitting part and the light reflecting part for facing the light-emitting unit. The light-transmitting part is formed with a plurality of light-transmitting surfaces arranged left and right and configured to protrude backward. Each light-transmitting surface defines a real focal point disposed in front of the light reflecting part. The light reflecting part is formed with a plurality of concave reflective surfaces arranged left and right. Each of the reflective surfaces defines a virtual focal point that overlaps one of the real focal points, and enables the extended line of light to be converged at the virtual focal point and reflected back toward one of the light-transmitting surfaces. The present invention is characterized in having the capability of concentrating light in an effective light distribution area.

Description

Virtual focus side-beam car light device

The present invention relates to a component of a vehicle, and in particular, to a virtual focus side-light vehicle lamp device suitable for use as a brake lamp.

Referring to Figures 1 to 3, an existing side-light vehicle lamp device includes a base unit 11, a light-emitting unit 12 provided on the base unit 11, and a guide installed on the base unit 11 and extending left and right. Optical element 13.

The light-emitting unit 12 includes three light sources 121 arranged back and forth and located between the substrate unit 11 and the light guide element 13 . The light sources 121 can provide light traveling in the left and right directions.

The light guide element 13 includes a light emitting part 14 and a light reflecting part 15 arranged back and forth, and a light incident part 16 connected between the light emitting part 14 and the light reflecting part 15 and facing the light emitting unit 12 .

The light-emitting part 14 has a flat light-emitting surface 141 . The reflective part 15 extends obliquely from front to back and includes a plurality of flat reflective surfaces 151 arranged left and right. Each reflective surface 151 can reflect the light traveling in the left-right direction back toward the light-emitting part 14, so that the light can be emitted from the light-emitting surface 141 and form a light shape as shown in FIG. 3. The light incident portion 16 is formed with three light collecting structures 161 protruding toward the light sources 121 .

This type of existing vehicle light device is suitable for use as a brake light seat to warn of vehicles coming from behind. However, as far as the brake lights are concerned, the effective light distribution area 180 stipulated by regulations is only located in the center as shown in Figure 3, but from Figure 3 Looking at isophote circles composed of the same candlelight (cd), taking the first isophote circle 181, the second isophote circle 182, and the third isophote circle 183 counting from the center outward as an example, they are all roughly in the length direction and the up and down direction. In addition to the first isophote circle 181 located in the effective light distribution area 180, the second isophote circle 182 and the third isophote circle 183 both protrude out of the effective light distribution area 180 in the up and down direction. Therefore, it can be seen that the existing vehicle light device wastes a lot of parts outside the effective light distribution area 180 and needs to be improved.

The object of the present invention is to provide a virtual focus side-beam vehicle lamp device that can improve at least one shortcoming of the prior art.

The virtual focus side-light vehicle lamp device is suitable for projecting light to the rear, and includes a substrate unit, a light-emitting unit, and a light guide element.

The light emitting unit is arranged on the base unit and can provide light projected in the left and right directions. The light guide element includes a light guide body extending left and right. The light guide body includes a light emitting part and a light reflecting part arranged one behind the other, and a light incident part connected between the light emitting part and the light reflecting part and facing the light emitting unit. The light-emitting part is formed with several light-emitting surfaces arranged left and right with convex surfaces facing backward. Each light-emitting surface can allow light to emit from the light guide element backwards, and defines a real focus located in front of the reflective part. The reflective portion is formed with a plurality of reflective surfaces arranged left and right, with the concave surface facing the outside of the light guide element. Each of the reflective surfaces is located in front of a respective light-emitting surface, defines a virtual focus that overlaps the respective real focus, and can direct the light entering the light guide element back toward the respective One of the light-emitting surfaces reflects, and the extended line of the reflected light intersects at the virtual focus.

The effect of the present invention is that the virtual focus of each reflective surface overlaps the real focus of one of the light-emitting surfaces, so that after the light is reflected by each of the reflective surfaces, it can produce a real focus as if it came from the light-emitting surface. The ejection effect can make most of the light concentrated in the effective light distribution area, avoid light wastage, reduce the light intensity required by the light-emitting unit, and reduce the waste heat generated by the light-emitting unit.

In the following description, similar or identical components will be represented by the same numbers.

Referring to FIGS. 4 to 6 , a first embodiment of a virtual focus side light vehicle light device of the present invention is suitable for being installed on a vehicle, and can project light rearward in the front-rear direction D11 and be used as a brake light. The vehicle is, for example, a motorcycle or a car.

Since the projection direction of light will be different depending on whether the present invention is installed in the front or rear of the vehicle, in the following description of the embodiments and the patent application scope of the present invention, the reference standard of the front and rear direction D11 is The present invention shall prevail, that is, the direction in which the light is finally projected from the present invention is determined as the rear of the present invention. However, in order to facilitate readers' understanding, in the description of the embodiments of the present invention, the present invention is installed at the rear of the vehicle. And the projection direction of the light is the rear of the vehicle as an example.

The first embodiment includes a substrate unit 2 extending along the front-to-back direction D11, a light-emitting unit 3 disposed on the substrate unit 2, and a light guide element 4 extending along the left-right direction D12.

The substrate unit 2 is generally rectangular with the length direction in the same direction as the front-to-back direction D11, and is used as a circuit board, and is integrated with a control circuit that can supply power to the light-emitting unit 3 and control the light-emitting unit 3. Since the structure of the substrate unit 2 is common knowledge and is not the focus of the present invention, an overly detailed description is omitted.

The light-emitting unit 3 includes two light sources 31 arranged one behind the other and spaced apart from each other. Each light source 31 is a light-emitting diode (LED) and can provide light projected into the light guide element 4 along the left-right direction D12. Specifically, each light source 31 provides light projected toward the left side of the drawing in FIG. 6 .

The light guide element 4 is made of transparent acrylic material, and can allow the light provided by the light sources 31 to enter, travel therein, and emit back from the inside. The light guide element 4 includes a light guide body 5 connected to the substrate unit 2 and extending left and right, two light guide wings 6 respectively protruding from the upper and lower sides of the light guide body 5 along the up and down direction D13 opposite to each other, and Two covers 7 are respectively provided outside the light guide wings 6 in the up-down direction D13.

The light guide body 5 includes a light exit part 51 and a light reflection part 52 arranged one behind the other, a light entrance part 53 connected between the light exit part 51 and the light reflection part 52 and facing the light emitting unit 3, and two The pin portions 54 respectively protrude from the front and rear sides of the light incident portion 53 and are used to position the pin portions 54 connected to the substrate unit 2 .

Referring to Figures 4, 8 and 9, the light emitting part 51 includes a first light emitting section 511 extending obliquely from front to back away from the reflective part 52, and a first light emitting section 511 extending from back to front towards the reflective part 52. The second light emitting section 512 extends obliquely to the ground. Specifically, the first light-emitting section 511 extends obliquely from the right to the left rear in the drawing of FIG. 9 , and the second light-emitting section 512 extends obliquely from the right rear to the left front and is connected to the first light-emitting section. 511 and the reflective part 52 .

The first light-emitting section 511 and the second light-emitting section 512 cooperate to form a plurality of light-emitting surfaces 513 arranged left and right and staggered front and back as shown in FIG. 8 .

The width direction of each light emitting surface 513 is in the same direction as the left and right direction D12, and the length direction is in the same direction as the up and down direction D13. Each light-emitting surface 513 is a convex surface protruding backward toward the outside of the light guide element 4 (see FIG. 10 ), and defines a real focus point P1 as shown in FIG. 9 . The real focus points P1 are arranged in a straight line extending left and right. Since the real focus points P1 are arranged in a straight line, and because the light exit surfaces 513 are staggered front and back, the curvatures of the light exit surfaces 513 are slightly different in design, so that the real focus points P1 can be on the same straight line.

Referring to FIGS. 5 , 7 , and 9 , the reflective portion 52 extends slightly from the light incident portion 53 toward the second light output section 512 from front to back as shown in FIG. 9 , and is connected to the second light output section 512 . Specifically, the reflective portion 52 extends slightly obliquely from right to front to left and rear, and has several protruding tooth structures 521 arranged left and right. Each protruding tooth structure 521 includes a reflective surface 522 whose length direction is in the same direction as the up-down direction D13 and whose width direction is in the same direction as an oblique extension direction D21. The diagonal extension direction D21 is substantially in the same direction as the line connecting the right front, left and rear. Specifically, the oblique extension angle A11 defined by the oblique extension direction D21 and the front-to-back direction D11 is 45 degrees. In other embodiments of the present invention, the oblique extension angle A11 can also be x degrees, and x is an integer between 35 and 70.

Referring to FIGS. 9 to 11 , FIG. 10 is a cross-sectional view taken along line XX in FIG. 6 , and FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 6 . The reflective surfaces 522 are arranged left and right at intervals, and each reflective surface 522 is located in front of a respective light-emitting surface 513 . Each reflective surface 522 is a total internal reflection surface protruding toward the inside of the light guide body 5 along a protruding direction D22 perpendicular to the diagonal extending direction D21, and defines an overlapping real focus point P1. The virtual focus P2. The protrusion direction D22 and the front-rear direction D11 define a protrusion angle A12 of approximately 45 degrees. The virtual focus points P2 are arranged in a straight line extending left and right. In other embodiments of the present invention, the protrusion angle A12 can also be y degrees, and y is an integer between 35 and 70.

The light incident portion 53 is formed with two light collecting structures 531 arranged front to back and protruding toward the light sources 31 of the light emitting unit 3 respectively. Each light collection structure 531 is cup-shaped and can allow light provided by a respective light source 31 to enter the light guide element 4 . Since the structure of the light-collecting structures 531 is common knowledge and is not the focus of the present invention, no further description is given.

Referring to Figures 5, 7, and 8, each light guide flank 6, viewed from the front view of Figure 7, is a triangle with a sharp angle protruding in the direction opposite to the other light guide flank 6, and includes a forward-facing and outer edge A substantially triangular sawtooth surface 61, and a substantially triangular flat surface 62 facing rearward as shown in FIG. 8 .

Each cover body 7 includes a main cover portion 71 extending left and right to cover each of the light guide wings 6 , and an extension portion 72 extending forward from a central portion of the main cover portion 71 . When viewed from the front view of FIG. 7 , each extension portion 72 is V-shaped with an opening facing the other extension portion 72 . In addition, with reference to FIG. 6 , it can be seen that each extension portion 72 extends forward to the front of the reflective surface 522 of several protruding tooth structures 521 of the reflective portion 52 .

Referring to FIGS. 9 to 11 , when the first embodiment is operating, the light sources 31 of the light-emitting unit 3 can respectively project light to the left toward the light-collecting structures 531 of the light-incident part 53 . After the light enters the light guide body 5 through the light collecting structures 531 , it will reach the reflective surfaces 522 of the reflective part 52 and be reflected back toward the light-emitting surfaces 513 by the reflective surfaces 522 .

After the light is reflected by each reflective surface 522, the extended line will intersect at the virtual focus P2 of each reflective surface 522. However, as mentioned above, because the virtual focus P2 of each reflective surface 522 overlaps with each respective light-emitting surface, Therefore, after the light is reflected by each reflective surface 522, it will have the effect of being emitted from the real focus P1 of the corresponding light-emitting surface 513 in front. In addition, since the light is reflected by the reflective surfaces 522 and appears to be emitted from the real focus points P1 of the light emitting surfaces 513, the light can be concentrated and emitted by the light emitting surfaces 513, thereby producing a light shape as shown in Figure 12.

It can be seen from the light shape of FIG. 12 that under the cooperation of the reflective surfaces 522 and the light exit surfaces 513, compared with the light shape of the prior art, the light can be more concentrated in the effective light distribution area 80 specified by regulations. . Specifically, the isophote circles composed of the same candlepower (cd) are the first isophote circle 81, the second isophote circle 82, and the third isophote circle 83 counting from the center. Transverse ellipses with the same left and right faces can be better filled in the effective light distribution area 80 . Therefore, the first embodiment has the characteristic of being able to concentrate light in the effective light distribution area 80 . Also because the first embodiment can concentrate light in the effective light distribution area 80, compared with the prior art, the first embodiment only needs to provide two of the light sources 31 and the light collection structure 531. In addition to In addition to reducing material costs, it can also save energy consumption and reduce waste heat generation.

It should be noted that a person with ordinary knowledge of the present invention will know that the focus actually has a range in space, so the virtual focus P2 overlaps the real focus P1, which may be a complete overlap (overlap) or a partial overlap (overlap). stack).

Referring to Figures 7, 9, and 10, the advantage of arranging the virtual focus points P2 in a straight line is that it facilitates optical design. Specifically, the curvatures of the reflective surfaces 522 of the protruding tooth structures 521 can be designed to be similar or the same as shown in FIG. 10 . The characteristic of the light guide side wings 6 is that compared with only the area of the light emitting portion 51 being available for light emitting, the sawtooth surfaces 61 and the flat surfaces 62 can cooperate with each other to use residual light to emit light, generating two additional triangular luminous areas. Warning area increases the visible area that can be noticed by drivers in other neighboring vehicles. The covers 7 can be used to protect the light guide wings 6 and the light guide element 4 .

Referring to FIG. 13 , a second embodiment of the virtual focus side-light vehicle lamp device of the present invention is similar to the first embodiment. The difference lies in that the light-emitting surfaces 513 of the light-emitting part 51 are coplanar and form an outline. The light-emitting surface group 514 is part of the cylindrical surface. Since the light-emitting surfaces 513 are coplanar, the curvatures of the light-emitting surfaces 513 must be designed to be the same. Therefore, the feature of the second embodiment is that the structure of the light-emitting surface group 514 is relatively simple.

To sum up, the effect of the virtual focus side-light vehicle lamp device of the present invention is that the virtual focus P2 of each reflective surface 522 overlaps the real focus P1 of a respective light-emitting surface 513, so the light passes through each reflective surface 522. After reflection, it can produce an effect as if it is emitted from the real focus P1 of the light-emitting surface 513, thereby allowing most of the light to be concentrated in the effective light distribution area 80, avoiding light wastage, and reducing the power required by the light-emitting unit 3. light intensity while reducing the waste heat generated by the light-emitting unit 3.

The above are only examples of the present invention and cannot be used to limit the patentable scope of the present invention. Simple equivalent changes and modifications based on the patentable scope of the present invention and the patent specification should also be included in the present invention. covered by the patent application.

2: Base unit 3:Light-emitting unit 31:Light source 4:Light guide element 5:Light guide body 51: Lighting Department 511: The first light section 512: The second light section 513: light-emitting surface 514: Glowing Noodle Set 52: Reflective part 521:Protruding tooth structure 522: Reflective surface 53: Light entrance part 531:Light collecting structure 54: Connecting feet 6: Light guide flanks 61: Serrated surface 62:Plane 7: Cover 71: Main cover 72:Extension 80: Effective light distribution area 81: First magnitude circle 82: Second equiluminous circle 83: Third equiluminous circle A11: oblique extension angle A12: convex angle D11: forward and backward direction D12: left and right direction D13: up and down direction D21: oblique extension direction D22:Protruding direction P1: real focus P2: virtual focus

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a cross-sectional view illustrating a conventional side-light vehicle lamp device; Figure 2 is a perspective view illustrating the existing side-light vehicle light device; Figure 3 is a light shape diagram simulating the light shape produced by the existing side-light vehicle light device; Figure 4 is a perspective view illustrating a first embodiment of the virtual focus side-light vehicle lamp device of the present invention; Figure 5 is a perspective view illustrating the first embodiment, but from a different angle than Figure 4; Figure 6 is a top view illustrating the first embodiment; Figure 7 is a front view illustrating the first embodiment; Figure 8 is a rear view illustrating the first embodiment; Figure 9 is a cross-sectional view, cut along the center line IX-IX in Figure 8; Figure 10 is a cross-sectional view, cut along line X-X in Figure 6; Figure 11 is a cross-sectional view, cut along line XI-XI in Figure 6; Figure 12 is a light shape diagram simulating the light shape produced by the first embodiment; and FIG. 13 is a cross-sectional view illustrating a second embodiment of the virtual focus side-light vehicle lamp device of the present invention.

2: Base unit

3:Light-emitting unit

31:Light source

4:Light guide element

5:Light guide body

51: Lighting Department

511: The first light section

512: The second light section

513: light-emitting surface

52: Reflective part

521:Protruding tooth structure

522: Reflective surface

53: Light entrance part

531:Light collecting structure

54: Connecting feet

7: Cover

72:Extension

A11: oblique extension angle

A12: convex angle

D11: forward and backward direction

D12: left and right direction

D21: oblique extension direction

D22:Protrusion direction

P1: real focus

P2: virtual focus

Claims (9)

A vehicle lighting device suitable for projecting light to the rear and comprising: a base unit; A light-emitting unit is provided on the substrate unit and can provide light projected in the left and right directions; and A light guide element includes a light guide body extending left and right. The light guide body includes a light emitting part and a light reflecting part arranged one behind the other, and a light emitting part connected between the light emitting part and the light reflecting part and facing the light emitting unit. The light entrance part has a plurality of light exit surfaces arranged left and right with convex surfaces facing backward. Each of the light exit surfaces can allow light to emit from the light guide element backwards, and defines a light exit in front of the reflective part. In real focus, the reflective part is formed with a plurality of reflective surfaces arranged left and right and convex toward the inside of the light guide element. Each of the reflective surfaces is located in front of a respective light-emitting surface and defines an overlapping respective one. The virtual focus of the real focus can reflect the light entering the light guide element back toward each of the light exit surfaces, and make the extended lines of the reflected light intersect at the virtual focus. The vehicle light device according to claim 1, wherein the light-emitting part includes a first light-emitting section that extends obliquely from front to back away from the reflective part, and a first light-emitting section that extends from back to front toward the reflective part. A second light-emitting section that extends obliquely, the light-emitting surfaces are formed on the first light-emitting section and the second light-emitting section, and the light-reflecting portion extends obliquely from the light-input section toward the second light-emitting section from front to back to connect the third light-emitting section. Two light sections. The vehicle light device according to claim 1, wherein the width direction of each light-emitting surface is the same as the left-right direction, the length direction is the same as the up-down direction, and the convex surface of each light-emitting surface faces the light guide element. The outside extends from front to back. The length direction of each reflective surface is in the same direction as the up and down direction, and the width direction is in the same direction as an oblique extension direction. The oblique extension direction and the front-to-back direction define an oblique extension of 35 to 70 degrees. The included angle is that each of the reflective surfaces protrudes toward the inside of the light guide element along a protruding direction transverse to the diagonal extending direction. The protruding direction and the front-to-back direction define a protruding included angle of 35 to 70 degrees. . The vehicle light device according to claim 1 or 3, wherein each of the reflective surfaces is a total internal reflection surface and defines a respective virtual focus. The vehicle light device as claimed in claim 4, wherein the virtual focus points are coordinated and arranged in a straight line. The vehicle light device according to claim 1, wherein the light guide element further includes two light guide side wings protruding from the upper and lower sides of the light guide body in the up and down direction, and each of the light guide side wings Includes a sawtooth surface facing forward, and a flat surface facing rearward. The vehicle light device according to claim 6, wherein the light guide element further includes two covers respectively covering the light guide wings in the up and down direction, and each cover includes a left and right extending A main cover covering each of the light guide wings, and an extension extending forward from the central part of the main cover, each of the extensions being V-shaped with an opening facing the other extension. , and extend forward to the front of some of the reflective surfaces. The vehicle lamp device according to claim 1, wherein the light incident part is formed with two light collecting structures arranged front and back and facing the light emitting unit, and the light emitting unit includes two light sources arranged front and back on the substrate unit. , each light source can provide light incident on a respective one of the light collecting structures. The vehicle light device according to claim 1, wherein the light-emitting unit includes two light sources arranged one after another on the substrate unit, and the light-emitting part includes a first light-emitting part that extends obliquely from front to back away from the reflective part. section, and a second light-emitting section extending obliquely from the back to the front towards the reflective part, the light-emitting surfaces are formed on the first light-emitting section and the second light-emitting section, each of the light-emitting sections The width direction of the surface is in the same direction as the left and right directions, and the length direction is in the same direction as the up and down direction, and the convex surface of each light-emitting surface protrudes from front to back toward the outside of the light guide element, and defines each of the actual The focal point, the reflective part extends obliquely from the light incident part toward the second light emitting section from front to back to connect the second light emitting section. The length direction of each reflective surface is in the same direction as the up and down direction, and the width direction is in the same direction as an oblique extension. The direction is the same, the diagonal direction and the front-to-back direction define a diagonal angle of 35 to 70 degrees, and each of the reflective surfaces is a total internal reflection surface, and is along a convex direction transverse to the diagonal direction. , protrudes toward the inner side of the light guide element, and defines each of the virtual focus points. The protrusion direction and the front-to-back direction define a protrusion angle of 35 to 70 degrees, and each of the virtual focus points overlaps. Each of the real focus points is arranged in a straight line in conjunction with the other virtual focus points. The light entrance part forms two light collecting structures arranged front and back and protruding toward the light sources of the light emitting unit respectively. One of the light collecting structures can allow the light generated by each of the light sources to enter. The light guide element also includes two light guide side wings protruding from the upper and lower sides of the light guide body in the upper and lower directions. , and two covers respectively covering the light guide wings in the up and down directions. Each of the light guide wings includes a sawtooth surface facing forward and a plane facing rear. Each cover body It includes a main cover extending left and right to cover each of the light guide wings, and an extension extending forward from the central part of the main cover, and each extension has an opening facing the other extension. V-shaped and extending forward to the front of some of the reflective surfaces.

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