JP5664900B2 - Optical unit for vehicles - Google Patents

Description

  The present invention relates to a vehicular optical unit, and more particularly, to a vehicular optical unit capable of both a daytime running lamp and a front turn lamp.

  Conventionally, in the field of vehicular lamps, vehicular lamps configured to achieve both daytime running lamps and front turn lamps have been proposed (see, for example, Patent Document 1).

  As shown in FIG. 11, the vehicular lamp 200 described in Patent Document 1 is a light guide inner lens 210, and light for a daytime running lamp that is emitted after being introduced from the end of the light guide inner lens 210. A first LED light source 220 that emits light, a second LED light source 230 that emits light for a front turn lamp, and the like.

Japanese Patent No. 4414364

  However, in the vehicular lamp 200 described in Patent Document 1, a region A that emits light by the light emitted from the first LED light source 220 and a region B that emits light by the light emitted from the second LED 230 are configured. Since they must be arranged separately, there is a problem that miniaturization cannot be realized by sharing the light emitting region.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular optical unit capable of realizing downsizing by sharing a light emitting region as compared with a conventional vehicular lamp. To do.

To achieve the above object, the invention according to claim 1 is directed to a light guide lens and a white LED that emits white light that is emitted after being introduced into the light guide lens to form a light distribution for a daytime running lamp. A light source and an orange LED light source that emits orange light that is emitted after being introduced into the light guide lens to form a light distribution for a front turn lamp, and the light guide lens emits light from the white LED light source. A white light incident portion for introducing the white light into the light guide lens; an orange light incident portion for introducing the orange light emitted from the orange LED light source into the light guide lens; A common light exit surface that emits white light and / or orange light introduced into the light guide lens, and the light guide lens has a surface as the common light exit surface and its surface as it goes from the base end surface toward the tip. Opposite Each of the white light incident portion and the orange light incident portion are each surrounded by a back surface and both side surfaces of the light source, and the thickness between the front surface and the back surface is reduced. The white LED light source is formed on the base end surface of the light guide lens, and the white LED light is introduced into the light guide lens from the white light incident portion and guided toward the tip of the light guide lens. As described above, the orange LED light source is arranged so as to face the white light incident portion, and the orange light is introduced into the light guide lens from the orange light incident portion. The orange light incident portion is arranged so as to be guided toward the tip of the light guide, and is guided toward the tip of the light guide lens on the back surface of the light guide lens. In order to emit white light and / or orange light from the common light exit surface, A plurality of individual total reflection surfaces for total reflection of the white light and / or orange light toward the common light exit surface are formed, and the white light incident portion and the orange light incident portion are provided with the guide light. It is characterized by being symmetrical in the width direction of the optical lens and arranged in a line .

  According to the invention which concerns on Claim 1, it becomes possible to implement | achieve size reduction by sharing a light emission area | region by combining a white LED light source and orange LED light source, and a light guide lens.

Further, the invention according to claim 1, by the action of a common exit surface of the light guide lens, it is possible to realize the downsizing by sharing the light emitting region (a common light exit surface).
Further, according to the invention according to claim 1, it is possible to form a light distribution for a daytime running lamp or a light distribution for a front turn lamp having substantially the same luminous intensity distribution with different colors by the action of the light guide lens. Become. In addition, it is possible to reduce the size by sharing the light emitting region (surface as a common light exit surface).
According to the first aspect of the present invention, the white light incident portion and the orange light incident portion are symmetrically arranged in a line with respect to the width direction of the light guide lens and are arranged in a line (that is, symmetrically). As a whole, the white light and / or orange light introduced into the light guide lens from the light incident part is folded back substantially evenly on both side surfaces of the light guide lens and emitted substantially uniformly in the left-right direction. As a result, it is possible to form a light distribution for daytime running lamps that is substantially equal in the left-right direction, or a light distribution for front turn lamps that is substantially the same in the left-right direction with substantially the same luminous intensity distribution. In addition, it is possible to reduce the size by sharing the light emitting region (surface as a common light exit surface).

The invention according to claim 2 is the invention according to claim 1 , wherein the number of the orange light incident portions is larger than the number of the white light incident portions, and the number of the white LED light sources is equal to the number of the white light incident portions. It is the same number as the number of light parts, and the number of the orange LED light sources is the same number as the number of the orange light incident parts.

According to the second aspect of the present invention, it is possible to compensate for the lack of luminous flux of the orange LED light source by increasing the number of orange light incident portions and orange LED light sources than the number of white light incident portions and white LED light sources. It becomes.

The invention according to claim 3 is the invention according to claim 1 , wherein the number of the orange light incident portions is the same as the number of the white light incident portions, and the number of the white LED light sources is equal to the white light source. The number of light incident portions is the same, and the number of orange LED light sources is the same as the number of orange light incident portions.

According to the third aspect of the present invention, it is possible to compensate for the lack of luminous flux of the orange LED light source by applying a larger current to the orange LED light source than to the white LED light source.

According to a fourth aspect of the present invention, in the first aspect of the invention, the white light incident portion is configured to cause white light emitted from the white LED light source in a narrow angle direction with respect to the optical axis to be closer to the optical axis. A first light incident surface for condensing and introducing the light into the light guide lens; a white light emitted from the white LED light source in a wide-angle direction with respect to the optical axis thereof; 2 includes a first total reflection surface that totally reflects white light introduced into the light guide lens from the second light incident surface toward the tip of the light guide lens, and the common The first light input surface, the second light input surface, and the second light input surface so that white light emitted from the light output surface forms a light distribution for a daytime running lamp having a light intensity distribution required by law on a virtual vertical screen facing the common light output surface. The shape of the light surface and the first total reflection surface is adjusted, The orange light incident portion is a third input for condensing the orange light emitted from the orange LED light source in a narrow angle direction with respect to the optical axis toward the optical axis and introducing it into the light guide lens. A light surface, a fourth light incident surface for introducing orange light emitted from the orange LED light source in a wide-angle direction with respect to the optical axis into the light guide lens, and from the fourth light incident surface to the inside of the light guide lens. A second total reflection surface that totally reflects the orange light introduced into the light guide lens toward the tip of the light guide lens, and the orange light emitted from the common light exit surface faces the common light exit surface. The shapes of the third light incident surface, the fourth light incident surface, and the second total reflection surface are adjusted so as to form a front turn lamp light distribution having a light intensity distribution required by a law on a vertical screen, The plurality of individual total reflection surfaces may be a specific viewpoint in front of the common light exit surface. Look, the are arranged so that the luminance of the common light exit surface is uniform, the plurality of individual total reflection surface, respectively, and parallel arrangement direction of the white light incident portion and the orange light entering part The plurality of individual reflecting surfaces are configured so that the light from the white LED light source is uniform so that the luminance of the common light exit surface is uniform when viewed from a specific viewpoint in front of the common light exit surface. An individual total reflection surface disposed in a first region where a light beam having a high relative intensity emitted in a narrow-angle direction with respect to the axis is incident, and the white LED light source; And an individual total reflection surface disposed so that the light beam having a low relative intensity is incident on the second region where the light beam having a low relative intensity is incident on the optical axis. It is characterized by .

According to the fourth aspect of the present invention, the light distribution for the daytime running lamp and the light distribution for the front turn lamp are realized, and the luminance of the common light exit surface when viewed from a specific viewpoint in front of the common light exit surface is substantially reduced. It becomes possible to make it uniform, and it is possible to realize miniaturization by sharing the light emitting region (surface as a common light emitting surface).

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the white LED light source is applied with a current smaller than a current for a daytime running lamp applied to the white LED light source. In this case, the light is turned on in a dimmed state to form a light distribution for the position lamp.

According to the invention which concerns on Claim 5 , in addition to the light distribution for a daytime running lamp and the light distribution for a front turn lamp, by further lighting a white LED light source in the dimmed state, furthermore, the light distribution for a position lamp Can also be formed.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, a current larger than a current for a daytime running lamp applied to the white LED light source is applied to the orange LED light source. It is characterized by that.

According to the sixth aspect of the present invention, it is possible to compensate for the lack of luminous flux of the orange LED light source by applying a larger current to the orange LED light source than the current for the daytime running lamp applied to the white LED light source. .

  ADVANTAGE OF THE INVENTION According to this invention, compared with the conventional vehicle lamp, it becomes possible to provide the vehicle optical unit which can implement | achieve size reduction by sharing a light emission area | region.

1 is a perspective view of a vehicle optical unit 10 according to an embodiment of the present invention. (A) Top view of the light guide lens 11, (b) Front view, (c) Rear view, (d) A cross-sectional view taken along line AA in FIG. 2 (b). 2A is a top view (including an optical path diagram) of the light guide lens 11, and FIG. 2B is a longitudinal sectional view (including an optical path diagram). (A) A table summarizing the relationship between each lamp and driving current and luminous flux (example of white LED light source × 1, orange LED light source × 2), (b) A table summarizing the relationship between each lamp, driving current and luminous flux. (Example of white LED light source x2, orange LED light source x2). It is an example of the light distribution _PDRL for daytime running lamps. It is an example of a part of the front turn lamp light distribution PF _{/ T} formed by one orange light incident portion 11h. It is an example of a part of the front turn lamp light distribution PF _{/ T} formed by the other orange light incident portion 11h. It is an example of light distribution PF _{/ T} for front turn lamps formed by superimposing the light distribution of FIG. 6 and the light distribution of FIG. It is a longitudinal cross-sectional view for demonstrating the modification 1 of the optical unit 10 for vehicles. (A)-(c) It is a figure for demonstrating the modification 2 of the optical unit 10 for vehicles. It is a cross-sectional view of a conventional vehicular lamp 200.

  Hereinafter, an optical unit for a vehicle which is an embodiment of the present invention will be described with reference to the drawings.

  The vehicle optical unit 10 according to the present embodiment is an optical unit configured to form a daytime running lamp (DRL) light distribution and / or a front turn lamp light distribution, and is provided on both left and right sides of the front portion of the vehicle. Each is arranged.

  As shown in FIGS. 1 and 2 (a) to 2 (d), the vehicular optical unit 10 has a front surface 11c as a common light exit surface and a back surface 11d opposite to the front end surface 11b from the base end surface 11a. Light guide lens 11 having a wedge shape with a reduced thickness therebetween, a white LED light source that emits white light that is emitted after being introduced into the light guide lens 11 and forms a light distribution for a daytime running lamp 12, an orange LED light source 13 that emits orange light that is emitted after being introduced into the light guide lens 11 to form a light distribution for the front turn lamp is provided.

  The light guide lens 11 is made of a transparent resin (for example, acrylic or polycarbonate) or glass, and is surrounded by a base end surface 11a, a surface 11c as a common exit surface, a back surface 11d on the opposite side, and both side surfaces 11f. As a wedge-shaped lens body.

  As shown in FIG. 1 and FIG. 2A, one white light incident part that introduces white light emitted from the white LED light source 12 into the inside of the light guide lens 11 on the base end surface 11 a of the light guide lens 11. 11g and two orange light incident portions 11h for introducing the orange light emitted from the orange LED light source 13 into the light guide lens 11 are formed. The white light incident part 11g and each orange light incident part 11h are symmetrical with respect to the width direction of the light guide lens 11 (base end face 11a) and are arranged in a line (that is, symmetrically).

  As shown in FIG. 3 (a), the white light incident portion 11g has white light emitted from the white LED light source 12 in a narrow-angle direction with respect to the optical axis AX1 (for example, optical axes AX1 to 20 of the white LED light source 12). A light incident surface 11g1 (a lens surface convex toward the white LED light source 12 side in this embodiment) for condensing the light toward the optical axis AX1 and introducing it into the light guide lens 11). A light incident surface 11g2 (cylindrical lens surface in the present embodiment) for introducing white light emitted from the white LED light source 12 in the wide-angle direction with respect to the optical axis AX1 into the light guide lens 11, a light incident surface The total reflection surface 11g3 etc. which totally reflect the white light introduced into the inside of the light guide lens 11 from 11g2 toward the tip 11b of the light guide lens 11 are included.

  The white light incident portion 11g (each light incident surface 11g1, 11g2, total reflection surface 11g3) has, for example, an aspherical shape and a total reflection surface shape, and white light emitted from the surface 11c of the light guide lens 11 is formed. The shape of each of the surfaces 11g1 to 11g3 is adjusted so as to form a light distribution for a daytime running lamp having a luminous intensity distribution required by the law on a virtual vertical screen directly facing the surface 11c.

  Similarly, the orange light incident portion 11h has orange light emitted from the orange LED light source 13 in a narrow-angle direction with respect to the optical axis AX2 (for example, a directional characteristic of about 20 ° from the optical axis AX2 of the orange LED light source 13 is strong. A light incident surface 11h1 (lens surface convex toward the orange LED light source 13 in this embodiment) for condensing the orange light) toward the optical axis AX2 and introducing it into the light guide lens 11, and from the orange LED light source 13 A light incident surface 11h2 (cylindrical lens surface in this embodiment) for introducing orange light radiated in the wide-angle direction with respect to the optical axis AX2 into the light guide lens 11, and the light incident surface 11h2 to the inside of the light guide lens 11 And a total reflection surface 11h3 that totally reflects the orange light introduced into the light guide lens 11 toward the tip 11b.

  The orange light incident portion 11h (each light incident surface 11h1, 11h2, total reflection surface 11h3) has, for example, an aspherical shape and a total reflection surface shape, and the orange light emitted from the surface 11c of the light guide lens 11 is formed. The shape of each of the surfaces 11h1 to 11h3 is adjusted so as to form a front turn lamp light distribution having a luminous intensity distribution required by the law on a virtual vertical screen directly facing the surface 11c.

  As shown in FIG. 3B, white light and / or orange light guided toward the tip 11 b of the light guide lens 11 is transmitted from the front surface 11 c of the light guide lens 11 to the back surface 11 d of the light guide lens 11. In order to emit light, a plurality of individual total reflection surfaces 11 d 1 for totally reflecting the white light and / or orange light toward the surface 11 c of the light guide lens 11 are formed.

  The plurality of individual total reflection surfaces 11d1 are arranged so that the luminance of the surface 11c is uniform when viewed from a specific viewpoint in front of the surface 11c of the light guide lens 11 (for example, directly in front of the surface 11c of the light guide lens 11). Has been. For example, each individual total reflection surface 11d1 is arranged in a region where a luminous flux having a strong relative intensity in the range of about 20 ° from the optical axis AX1 of the white LED light source 12 is incident so that the luminous flux is not easily reflected. On the other hand, each individual total reflection surface 11d1 is disposed in a region where a light beam having a weak relative intensity in a range larger than 20 ° from the optical axis AX1 of the white LED light source 12 is incident so that the light beam is easily reflected. As described above, the luminance of the surface 11c viewed from a specific viewpoint in front of the surface 11c of the light guide lens 11 (for example, directly in front of the surface 11c of the light guide lens 11) can be made substantially uniform.

  The white LED light source 12 and the orange LED light source 13 are used in the same number as the white light incident part 11g and each orange light incident part 11h, and the arrangement thereof is also the same as the white light incident part 11g and each orange light incident part 11h. Similarly, they are symmetrical with respect to the width direction of the light guide lens 11 (base end face 11a) and arranged in a line (that is, symmetrically) (see FIG. 1).

  The white LED light source 12 is supplied to the white light incident portion 11g so that the white light is introduced from the white light incident portion 11g into the light guide lens 11 and guided toward the tip 11b of the light guide lens 11. It is arranged in a state of facing each other.

  The white LED light source 12 is connected to a circuit (not shown) as current control means for controlling the current applied to the white LED light source 12. This circuit controls the current applied to the white LED light source 12 in accordance with on / off of the daytime running lamp switch or the position lamp switch. For example, as shown in FIG. 4A, when the daytime running lamp switch is turned on, a drive current of 0.38 [A] is applied to the white LED light source 12 and when the position lamp switch is turned on, Less driving current 0.06 [A] is applied to the LED light source 12 than when the daytime running lamp switch is on.

  The orange LED light source 13 is supplied to the orange light incident portion 11h so that the orange light is introduced from the orange light incident portion 11h into the light guide lens 11 and guided toward the tip 11b of the light guide lens 11. It is arranged in a state of facing each other.

  A circuit (not shown) is connected to the orange LED light source 13 as current control means for controlling the current applied to the orange LED light source 13. This circuit applies a drive current (for example, 0.38 [A]) to the orange LED light source 13 so that the orange LED light source 13 blinks when the front turn lamp switch is turned on (see FIG. 4A). .

  In general, when the drive current is the same, the orange LED light source 13 has a luminous flux that is about 30 to 40% lower than that of the white LED light source 12. In the present embodiment, in order to compensate for the lack of luminous flux of the orange LED light source 13, the number of orange LED light sources 13 (and orange light incident portions 11h) larger than the number of white LED light sources 12 (and white light incident portions 11g). Is used.

  Next, the operation of the vehicular optical unit 10 configured as described above will be described.

As shown in FIG. 4A, when the daytime running lamp switch is turned on, a drive current (for example, 0.38 [A]) is applied from a circuit (not shown) as current control means, and the white LED light source 12 lights up. As shown in FIG. 3B, the white light is introduced into the light guide lens 11 from the white light incident portion 11 g and guided toward the tip 11 b of the light guide lens 11. The light is totally reflected by the action of the plurality of individual total reflection surfaces 11 d 1 formed on the back surface 11 d and is emitted from the front surface 11 c of the light guide lens 11. Thus, directly facing on a virtual vertical screen surface 11c of the light guide lens 11, daytime running lamp light distribution P _DRL light intensity distribution regulations seek is formed (see FIG. 5).

Referring to FIG. 5, it can be seen that the daytime running lamp light distribution _PDRL is an even light distribution on the left and right. This is because the white light incident portion 11g is arranged at the substantially center in the width direction of the light guide lens 11 (base end surface 11a) (see FIG. 1), and is introduced into the light guide lens 11 from the white light incident portion 11g. This is because the white light is folded back almost uniformly (that is, internally reflected) on both side surfaces 11f of the light guide lens 11.

On the other hand, when the front turn lamp switch is turned on, a drive current (for example, 0.38 [A]) is applied from a circuit (not shown) as current control means, and each orange LED light source 13 blinks. As shown in FIG. 3B, when attention is paid to one orange light incident portion 11h, the orange light introduced into the light guide lens 11 from the one orange light incident portion 11h The light is guided toward the tip 11b, is totally reflected by the action of the plurality of individual total reflection surfaces 11d1 formed on the back surface 11d of the light guide lens 11, and is emitted from the surface 11c of the light guide lens 11. Thereby, a part of the light distribution PF _{/ T} for the front turn lamp having the luminous intensity distribution required by the law is formed on the virtual vertical screen directly facing the surface 11c of the light guide lens 11 (see FIGS. 6 and 7). ).

  Referring to FIGS. 6 and 7, the light distribution formed by the orange light introduced into the light guide lens 11 from one orange light incident portion 11h is a left-right or left-right non-uniform light distribution. I understand that This is because each orange light incident portion 11h is arranged at a position biased to the left or right in the width direction of the base end surface 11a of the light guide lens 11 (see FIG. 1), and is guided from each orange light incident portion 11h. This is because the orange light introduced into the lens 11 is unevenly folded (that is, internally reflected) on both side surfaces 11f of the light guide lens 11.

However, the orange light incident portions 11h are symmetrical with respect to the width direction of the base end surface 11a of the light guide lens 11 and are arranged in a line (that is, symmetrically) (see FIGS. 1 and 2A). When attention is paid to the two orange light incident portions 11h, the orange light introduced from the two orange light incident portions 11h is folded back almost equally on both side surfaces 11f of the light guide lens 11. Therefore, the left and right non-uniform light distribution (see FIGS. 6 and 7) biased to the left or right is superimposed on the virtual vertical screen facing the surface 11c of the light guide lens 11 as a whole. A turn lamp light distribution PF _{/ T} is formed (see FIG. 8).

  On the other hand, when the position lamp switch is turned on, a drive current (for example, 0.06 [A]) that is less than when the daytime running lamp switch is turned on from the circuit (not shown) as the current control means to the white LED light source 12. Is applied and the white LED light source 12 is turned on in a dimmed state. The white light is emitted from the surface 11c of the light guide lens 11 through the same optical path as when the daytime running lamp is switched on (see FIG. 3B). As a result, a position lamp light distribution having a luminous intensity distribution required by the law is formed on a virtual vertical screen facing the surface 11c of the light guide lens 11.

  Next, a lighting pattern example of the vehicle optical unit 10 will be described.

  First, there is a pattern in which the headlamp is turned on and the white LED light source 12 is turned on in a dimmed state. In this case, the vehicular optical unit 10 functions as a position lamp.

  There is also a pattern in which the white LED light source 12 is lit in a dimmed state and the orange LED light source 13 is blinking. In this case, the vehicular optical unit 10 functions as a position lamp and a front turn lamp.

  Further, the front turn lamp switch is turned on while the white LED light source 12 is lit as a daytime running lamp, the orange LED light source 13 blinks, and the blinking white LED light source 12 (for example, the right side). There is also a pattern that turns off. In this case, the vehicle optical unit 10 disposed on the right side functions as a front turn lamp, and the vehicle optical unit disposed on the left side functions as a daytime running lamp. In addition to the above, various lighting patterns can be considered as long as the laws and regulations are satisfied.

  As described above, according to the vehicle optical unit 10 of the present embodiment, the light emitting area (the surface 11c of the light guide lens 11) is shared by the action of the surface 11c of the light guide lens 11 as a common light exit surface. Can be realized. For example, it is possible to reduce the size by about half compared to a vehicular lamp configured to achieve both a daytime running lamp and a front turn lamp according to the prior art. In addition, since the optical system can be realized by only one light guide lens 11, the cost can be reduced compared to the structure in which the optical system is individually provided, and further, the heat dissipation structure of the LED can be shared, which leads to weight reduction. Is possible.

  Moreover, according to the vehicle optical unit 10 of the present embodiment, the number of the orange light incident portions 11h and the orange LED light sources 13 is larger than the number of the white light incident portions 11g and the white LED light sources 12, thereby It becomes possible to compensate for the light flux shortage of the light source 13.

  Further, according to the vehicle optical unit 10 of the present embodiment, daytime running lamp light distribution and front turn lamp light distribution are realized, and the front side of the surface 11c of the light guide lens 11 as a common light exit surface is specified. When viewed from the viewpoint, the luminance of the surface 11c can be made substantially uniform, and the size can be reduced by sharing the light emitting region (the surface 11c as a common light exit surface).

  Further, according to the vehicle optical unit 10 of the present embodiment, the white light incident portion 11g and the orange light incident portion 11h are symmetrical with respect to the width direction of the light guide lens 11 and arranged in a line (that is, symmetrically). Therefore, the white light and / or orange light introduced into the light guide lens 11 from the respective light incident portions 11g and 11h is folded substantially equally on both side surfaces 11f of the light guide lens 11 as a whole in the left-right direction. Are emitted almost uniformly. As a result, it is possible to form a light distribution for daytime running lamps that is substantially equal in the left-right direction, or a light distribution for front turn lamps that is substantially the same in the left-right direction with substantially the same luminous intensity distribution. In addition, it is possible to achieve downsizing by sharing the light emitting region (surface 11c as a common light exit surface).

  Further, according to the vehicle optical unit 10 of the present embodiment, by turning on the white LED light source 12 in a dimmed state, in addition to the light distribution for the daytime running lamp and the light distribution for the front turn lamp, It is possible to form a light distribution for the position lamp.

  Next, a modified example will be described.

[Modification 1]
In the above embodiment, the example in which the white light incident portion 11g and each orange light incident portion 11h are formed on the proximal end surface 11a of the light guide lens 11 has been described, but the present invention is not limited to this.

  As shown in FIG. 9, in this modification, the white light incident portion 11 g and each orange light incident portion 11 h are formed on the base end surface 11 a side of the back surface 11 d of the light guide lens 11.

  The white LED light source 12 has a white light incident portion 11g so that the white light is introduced from the white light incident portion 11g into the light guide lens 11 and guided toward the surface 11c of the light guide lens 11. It is arrange | positioned in the state facing to. In addition, the orange LED light source 13 receives the orange light so that the orange light is introduced from the respective orange light incident portions 11h into the light guide lens 11 and guided toward the surface 11c of the light guide lens 11. It arrange | positions in the state facing the optical part 11h.

  Further, the light guide lens 11 directs white light and / or orange light introduced into the light guide lens 11 from the white light incident portion 11 g and the orange light incident portion 11 h toward the tip 11 b of the light guide lens 11. A total reflection surface 11i for total reflection is included. About another structure, it is the same as that of the said embodiment.

  Also according to this modification, it is possible to achieve the same effects as in the above embodiment.

[Modification 2]
In the above embodiment, the example using one white light incident portion 11g and two orange light incident portions 11h has been described (see FIG. 1), but the present invention is not limited to this.

  In short, the white light incident portion 11g and the orange light incident portion 11h are symmetrical in a line with respect to the width direction of the light guide lens 11 (the base end surface 11a side of the base end surface 11a or the back surface 11d), and are arranged in a line (that is, symmetrically) The number of white light incident portions 11g and orange light incident portions 11h is not particularly limited.

  For example, as shown in FIG. 10 (a) and FIG. 10 (b), two white light incident portions 11g and two orange light incident portions 11h may be used, or FIG. 10 (c). As shown, two white light incident portions 11g and three orange light incident portions 11h may be used.

[Modification 3]
In the above-described embodiment, the example in which the white light incident portion 11g is arranged at the substantially center in the width direction of the light guide lens 11 (base end surface 11a) has been described (see FIG. 1), but the present invention is not limited to this.

  In short, the white light incident portion 11g and the orange light incident portion 11h are symmetrical in a line with respect to the width direction of the light guide lens 11 (the base end surface 11a side of the base end surface 11a or the back surface 11d), and are arranged in a line (that is, symmetrically) The arrangement of the white light incident portion 11g and the orange light incident portion 11h is not particularly limited.

  For example, as shown in FIG. 10B and FIG. 10C, the orange light incident portion 11h may be disposed at the approximate center in the width direction of the light guide lens 11 (base end surface 11a).

[Modification 4]
In the said embodiment, although the example using the LED light sources 12 and 13 of the same number (three) as each light incident part 11g and 11h was demonstrated, this invention is not limited to this. For example, white light (or orange light) radiated from one LED light source 12 (or LED light source 13) is branched by a light guide means such as an optical fiber, and the inside of the light guide lens 11 from a plurality of light incident portions 11g and 11h. May be introduced. Or conversely, white light (or orange light) radiated from a plurality of LED light sources 12 (or LED light sources 13) is merged by a light guide means such as an optical fiber to guide light from one light incident portion 11g, 11h. 11 may be introduced inside.

[Modification 5]
In the said embodiment, in order to supplement the lack of light flux of the orange LED light source 13, the example using the orange LED light source 13 of the number larger than the number of white LED light sources 12 was demonstrated, This invention is not limited to this.

  For example, as shown in FIGS. 10A and 10B, the same number of orange LED light sources 13 as the number of white LED light sources 12 may be used.

  In this case, when the front turn lamp switch is turned on, the daytime running lamp current applied to the white LED light source 12 when the daytime running lamp switch is turned on (for example, 0.19 [A]; see FIG. 4B). By applying a larger driving current (for example, 0.38 [A], see FIG. 4B) to each of the orange LED light sources 13 as many as the number of white LED light sources 12, the light flux shortage of the orange LED light sources 13 is compensated. Is possible.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

DESCRIPTION OF SYMBOLS 10 ... Vehicle optical unit, 11 ... Light guide lens, 11a ... Base end surface, 11b ... Tip, 11c ... Front surface, 11d ... Back surface, 11d1 ... Individual total reflection surface, 11f ... Side surface, 11g ... White light incident part, 11g1 Light incident surface 11g2 Light incident surface 11g3 Total reflection surface 11h Orange light incident portion 11h1 Light incident surface 11h2 Light incident surface 11h3 Total reflection surface 11i Total reflection surface 12 ... White LED light source, 13 ... Orange LED light source, P _DRL ... Light distribution for daytime running lamp, P _{F / T} ... Light distribution for front turn lamp

Claims (6)

A light guide lens;
A white LED light source that emits white light that is emitted after being introduced into the light guide lens to form a light distribution for a daytime running lamp;
An orange LED light source that emits orange light that is emitted after being introduced into the light guide lens and forms a light distribution for a front turn lamp , and
The light guide lens includes a white light incident part for introducing white light emitted from the white LED light source into the light guide lens, and orange light emitted from the orange LED light source inside the light guide lens. An orange light incident portion for introduction into the light guide lens, and a common light exit surface from which the white light and / or orange light introduced into the light guide lens exits,
The light guide lens is surrounded by the surface as the common light exit surface, the opposite back surface and both side surfaces from the base end surface toward the tip, and the thickness between the front surface and the back surface decreases. It is configured in a wedge shape,
Each of the white light incident portion and the orange light incident portion is formed on a base end surface of the light guide lens,
The white LED light source faces the white light incident portion so that white light is introduced from the white light incident portion into the light guide lens and guided toward the tip of the light guide lens. Arranged in a state,
The orange LED light source faces the orange light incident portion so that the orange light is introduced from the orange light incident portion into the light guide lens and guided toward the tip of the light guide lens. Arranged in a state,
In order to emit white light and / or orange light guided toward the tip of the light guide lens from the common light exit surface, the white light and / or orange light is emitted from the back surface of the light guide lens. A plurality of individual total reflection surfaces for total reflection toward the common light exit surface are formed.
The optical unit for vehicles, wherein the white light incident part and the orange light incident part are symmetrically arranged in a line with respect to the width direction of the light guide lens . The number of the orange light incident portions is greater than the number of the white light incident portions,
The number of the white LED light sources is the same as the number of the white light incident portions,
The number of the orange LED light source for a vehicle optical unit according to claim 1, characterized in that the same as the number of the orange light entrance section. The number of the orange light incident portions is the same as the number of the white light incident portions,
The number of the white LED light sources is the same as the number of the white light incident portions,
The number of the orange LED light source for a vehicle optical unit according to claim 1, characterized in that the same as the number of the orange light entrance section. The white light incident part is a first input for condensing white light emitted from the white LED light source in a narrow-angle direction with respect to the optical axis and introducing it into the light guide lens. A light surface, a second light incident surface for introducing white light emitted from the white LED light source in a wide-angle direction with respect to the optical axis into the light guide lens, and the second light incident surface to the inside of the light guide lens A first total reflection surface that totally reflects the white light introduced into the light guide lens toward the tip of the light guide lens, and the white light emitted from the common light exit surface faces the common light exit surface. The shapes of the first light incident surface, the second light incident surface, and the first total reflection surface are adjusted so as to form a light distribution for a daytime running lamp having a light intensity distribution required by a law on a vertical screen,
The orange light incident portion is a third input for condensing the orange light emitted from the orange LED light source in a narrow-angle direction with respect to the optical axis thereof toward the optical axis and introducing it into the light guide lens. A light surface, a fourth light incident surface for introducing orange light emitted from the orange LED light source in a wide-angle direction with respect to the optical axis into the light guide lens, and from the fourth light incident surface to the inside of the light guide lens. A second total reflection surface that totally reflects the orange light introduced into the light guide lens toward the tip of the light guide lens, and the orange light emitted from the common light exit surface faces the common light exit surface. The shapes of the third light incident surface, the fourth light incident surface, and the second total reflection surface are adjusted so as to form a light distribution for the front turn lamp having a light intensity distribution required by a law on a vertical screen,
The plurality of individual total reflection surfaces are arranged so that the luminance of the common light exit surface is uniform when viewed from a specific viewpoint in front of the common light exit surface ,
Each of the plurality of individual total reflection surfaces is configured as a surface extending in a direction parallel to the arrangement direction of the white light incident portion and the orange light incident portion,
The plurality of individual reflecting surfaces are radiated in a narrow-angle direction with respect to the optical axis of the white LED light source so that the luminance of the common light emitting surface is uniform when viewed from a specific viewpoint in front of the common light emitting surface. In a first region where a luminous flux having a high relative intensity is incident, an individual total reflection surface arranged so that the luminous flux having a high relative intensity is not easily reflected, and radiation in a wide-angle direction with respect to the optical axis of the white LED light source the second region relative intensity is weak light beam is incident, according to claim 1 in which the relative intensity is weak light beam, characterized in that it comprises a separate total reflection surface disposed so as to be easily reflected Optical unit for vehicles. The white LED light source is turned on in a dimmed state to form a light distribution for a position lamp when a current smaller than a current for a daytime running lamp applied to the white LED light source is applied. The optical unit for vehicles according to any one of claims 1 to 4 . The orange LED light source for a vehicle optical unit according to any one of claims 1 to 5, wherein the white more current than for daytime running lamp applied to the LED light source is applied.

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