Vehicle signal lamp

Abstract

To provide a vehicular signal lamp that allows a p-type color-vision impaired person to recognize whether a vehicular signal lamp (such as stop lamp, tail lamp) blinks.SOLUTION: A vehicular signal lamp 10 includes: a first light source 20A for emitting red light; and a second light source 20B for emitting amber light. The first light source and the second light source blink at the same time and emit light with higher light intensity in accordance with brake operation, where the first light source has light emission intensity that is higher than light emission intensity of the second light source.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle signal lamp, and more particularly to a vehicle signal lamp that enables a person with protanopia to recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

Background Art

[0002] There is known a vehicle signal lamp including a first light source that emits red light in a first wavelength band (620 nm or more) and a second light source that emits red light in a second wavelength band (less than 620 nm), wherein the first light source and the second light source are lit simultaneously and emit light with a higher luminous intensity in response to a braking operation (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the visual sensitivity of a person with protanopia to red light is lower than that of a person with normal color vision to red light, there is a problem that it is difficult for a person with protanopia to recognize red light and it is difficult to recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

[0005] The present invention has been made to solve such problems, and an object thereof is to provide a vehicle signal lamp that enables a person with protanopia to recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

Means for Solving the Problems

[0006] The vehicle signal lamp according to the present invention includes a first light source that emits red light and a second light source that emits amber light. The first light source and the second light source are lit simultaneously and emit light with a higher luminous intensity in response to a braking operation. The luminous intensity of the first light source is higher than that of the second light source.

[0007] With such a configuration, a person with p-type color vision can recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

[0008] This is because it is provided with a second light source that emits amber light with a high visual sensitivity (higher than red light) for a person with p-type color vision.

[0009] Further, in the above vehicle signal lamp, it may further include a light emitting portion that emits light by transmitting a mixture of the red light and the amber light, and an optical component that controls the red light and the amber light so that the mixture of the red light and the amber light passes through the light emitting portion.

[0010] Further, in the above vehicle signal lamp, the ratio of the integrated intensity of the red light and the amber light after passing through the light emitting portion may be adjusted so that the chromaticity range of the light mixture of the red light and the amber light is x>0.71 and y<0.289.

[0011] In this way, it is possible to provide a vehicle lamp that allows a person with normal color vision to recognize red and allows a person with p-type color vision to recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

[0012] The reason why a person with normal color vision can recognize red is that the ratio of the integrated intensity of the red light and the amber light after passing through the light emitting portion is adjusted so that the chromaticity range of the light mixture of the red light and the amber light is x>0.71 and y<0.289.

[0013] A p-type color vision person can recognize whether a vehicle signal lamp (e.g., a stop lamp, a tail lamp) is lit because the vehicle signal lamp is provided with a second light source that emits amber light with a high visual sensitivity (higher than red light) for p-type color vision persons.

[0014] Also, in the vehicle signal lamp, the amber light may have a peak wavelength of 600 nm or less.

[0015] Also, in the vehicle signal lamp, the red light includes a wavelength of 620 nm or more, the amber light does not include a wavelength of 620 nm or more, and the ratio of the integrated intensity after passing through the light emitting part may be red:amber = 100:2.7 to 4.0.

[0016] Also, in the vehicle signal lamp, at least one of the first light source and the second light source may be an LED.

[0017] Also, in the vehicle signal lamp, at least one of the first light source and the second light source may be an organic EL.

[0018] Also, in the vehicle signal lamp, the optical component may be a light guide rod or a light guide plate.

[0019] Also, in the vehicle signal lamp, the optical component may be a reflector.

[0020] Also, in the vehicle signal lamp, the optical component may be a concave lens.

Advantages of the Invention

[0021] According to the present invention, it is possible to provide a vehicle signal lamp that allows a p-type color vision person to recognize whether a vehicle signal lamp (e.g., a stop lamp, a tail lamp) is lit.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0023] Hereinafter, the vehicle signal lamp 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, corresponding components are denoted by the same reference numerals, and redundant descriptions are omitted.

[0024] The vehicle signal lamp 10 of the present embodiment is a vehicle signal lamp that functions as a stop lamp and a tail lamp, and is mounted on both the left and right sides of the rear end of a vehicle (not shown) such as an automobile.

[0025] FIG. 1 is a top view of the vehicle signal lamp 10.

[0026] As shown in FIG. 1, the vehicle signal lamp 10 includes a first light source 20A, a second light source 20B, and an optical component 30. The vehicle signal lamp 10 is disposed in a lamp chamber 60 formed by an outer lens 40 and a housing 50, and is fixed to the housing 50 or the like. Hereinafter, for convenience of explanation, as shown in FIG. 1 and the like, an XYZ axis is defined. The X axis extends in the vehicle front-rear direction. The Y axis extends in the vehicle width direction. The Z axis extends in the vertical direction.

[0027] FIG. 2 is an example of the emission spectra of the first light source 20A and the second light source 20B.

[0028] The first light source 20A is a light source that emits red light, and is, for example, an LED (light emitting diode). As shown in FIG. 2, the red light emitted by the first light source 20A includes a wavelength of 620 nm or more.

[0029] The second light source 20B is a light source that emits amber light, and is, for example, an LED. As shown in FIG. 2, the amber light emitted by the second light source 20B has a peak wavelength at 600 nm or less. Further, the amber light emitted by the second light source 20B does not include a wavelength of 620 nm or more. Furthermore, preferably, the amber light emitted by the second light source 20B does not include red light.

[0030] The optical component 30 is an optical component that controls the red light emitted by the first light source 20A and the amber light emitted by the second light source 20B so that the light obtained by mixing (color mixing) the red light and the amber light passes through the outer lens 40.

[0031] As an example of the optical component 30, a light guide plate will be described. Hereinafter, it is referred to as the light guide plate 30.

[0032] As shown in FIG. 1, the light guide plate 30 is a plate-shaped light guide plate made of a transparent resin such as acrylic or polycarbonate and having a thickness in the X direction. The light guide plate 30 includes a pair of main surfaces 30a and 30b facing each other. The first light source 20A and the second light source 20B are arranged so as to face the end surface 31 (hereinafter referred to as the light incident surface 31) of the light guide plate 30. One of the main surfaces 30a is directed in the light irradiation direction (for example, the rear of the vehicle). The other main surface 30b includes a plurality of optical elements (for example, a plurality of V-grooves extending in the Z direction) for diffusely reflecting the light incident on the other main surface 30b and emitting the light from one main surface 30a. The red light emitted by the first light source 20A and the amber light emitted by the second light source 20B enter from the light incident surface 31, are guided in the light guide plate 30, are diffusely reflected by the other main surface 30b (a plurality of optical elements), and are emitted as light obtained by mixing the red light and the amber light from one main surface 30a. The light obtained by mixing the red light and the amber light passes through the outer lens 40 and is irradiated rearward. At this time, the outer lens 40 emits light by the light obtained by mixing the red light and the amber light passing through the outer lens 40 (emitting light from the same surface).

[0033] The outer lens 40 is made of a transparent resin such as acrylic or polycarbonate. The outer lens 40 is an example of the light emitting portion of the present invention.

[0034] The ratio of the integrated intensities of red light and amber light after passing through the outer lens 40 (hereinafter simply referred to as the ratio of red light and amber light) is adjusted (set) so that the chromaticity range of the light mixed with red light and amber light is x > 0.71 and y < 0.289 so that a person with normal color vision can recognize it as red. For example, the ratio of red light to amber light is adjusted (set) to be red:amber = 100:2.7 to 4.0.

[0035] The ratio of red light and amber light can be calculated using the following formulas 1 to 6.

[0036] First, in the XYZ color space defined by CIE 1931, the xy chromaticity coordinates (x, y) are defined by the following formulas 1 and 2.

[0037]

Equation

[0038]

Equation

[0039]

Equation

[0040]

Equation

[0041]

Equation

[0042]

Equation

Equation

[0043] According to the above formulas 1 to 6, the ratio of the red light and the amber light that results in a chromaticity range (x > 0.71, y < 0.289) that a normal trichromat can recognize as red is (S R (λ) and S Am (λ)), for example, the ratio of red:amber = 100:2.7 to 4.0 can be obtained.

[0044] Next, the effect of simultaneously turning on (continuously lighting) the first light source 20A and the second light source 20B so that the ratio of the red light and the amber light is the above ratio (for example, red:amber = 100:2.7 to 4.0) will be described while comparing with a comparative example.

[0045] Figure 3 is a graph showing the brightness amount (comparative example, embodiment) of a P-type color vision observer, and Figure 4 is a graph showing the visual sensitivity of a P-type color vision observer.

[0046] The comparative example shown in Figure 3 corresponds to the vehicle signal lamp device 10 with the second light source 20B omitted. Otherwise, it has the same configuration as the vehicle signal lamp device 10.

[0047] The brightness that a person feels with respect to the total amount of light emitted from a certain light source is expressed by the following formula 7 using the concept of photometric quantity. Here, Km is the maximum visual effect degree, and V(λ) is the standard spectral luminous efficiency.

[0048]

Equation

[0049]

Equation

[0050] Let the spectrum when the first light source 20A that emits red light in the first wavelength band (620 nm or more) and the second light source 20B that emits red light in the second wavelength band (wavelength less than 620 nm) are lit simultaneously be S2(λ). Here, S2(λ) is obtained from the following Equation 9 S2(λ)=S SR (λ)+S AR (λ) ···(Equation 9) In contrast, in this embodiment, when the first light source 20A and the second light source 20B are lit simultaneously such that the ratio of red light to amber light is the above ratio (for example, red:amber = 100:2.7 to 4.0), the spectrum is defined as S1(λ).

[0051] Here, S1(λ) is obtained by the following Equation 10.

[0052] S1(λ)=S SR (λ)+S Am (λ) ···(Equation 10) Using the above formulas (8), (9), and (10), when calculating the brightness perceived by P-type color vision individuals in each of the comparative example and the present embodiment, the brightness perceived by P-type color vision individuals in the comparative example is 1.000, while the brightness perceived by P-type color vision individuals in the present embodiment is 1.108. Compared with the comparative example, the brightness perceived by P-type color vision individuals in the present embodiment is improved by 10.8%.

[0053] As shown in FIG. 4, this is because the visual sensitivity of P-type color vision individuals to amber light is higher than that to red light.

[0054] In the vehicle signal lamp 10 having the above configuration, when the vehicle signal lamp 10 functions as a tail lamp, the first light source 20A and the second light source 20B are simultaneously lit (continuously lit) so that the ratio of red light to amber light becomes the above ratio (for example, red:amber = 100:2.7 to 4.0).

[0055] As shown in FIG. 1, the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B enter from the light incident surface 31, are guided through the light guide plate 30, are diffusely reflected by the other main surface 30b (a plurality of optical elements), and exit as light mixed with red light and amber light from one main surface 30a. The light mixed with red light and amber light passes through the outer lens 40 and is irradiated rearward. At this time, the outer lens 40 emits light by the light mixed with red light and amber light passing through the outer lens 40. Thereby, a tail lamp is realized.

[0056] At this time, since amber light with a high visual sensitivity of P-type color vision individuals (higher than red light) is mixed, the brightness is improved by 10.8% compared with the case where no amber light is mixed (see FIG. 3). As a result, P-type color vision individuals can recognize that the vehicle signal lamp (tail lamp) is lit.

[0057] In addition, since the ratio of red light to amber light is adjusted (set) such that the chromaticity range of the light mixed with red light and amber light is x > 0.71 and y < 0.289, a person with normal color vision can recognize it as red. In particular, since the first light source 20A emits red light including wavelengths of 620 nm or more, a person with normal color vision can recognize it as dark red.

[0058] Also, in the vehicle signal lamp 10 having the above configuration, when the vehicle signal lamp 10 functions as a stop lamp, in response to a brake operation, the ratio of red light to amber light becomes the above ratio (for example, red:amber = 100:2.7 to 4.0), and the first light source 20A and the second light source 20B are simultaneously made to emit light so as to emit light with a higher luminous intensity.

[0059] As shown in FIG. 1, the higher-luminance red light Ray emitted by the first light source 20A 20A and the higher-luminance amber light Ray emitted by the second light source 20B 20B enter from the light incident surface 31, are guided through the light guide plate 30, are diffusely reflected by the other main surface 30b (a plurality of optical elements), and exit as light mixed with red light and amber light from the one main surface 30a. The light mixed with red light and amber light passes through the outer lens 40 and is irradiated rearward. At this time, the outer lens 40 emits light by the light mixed with red light and amber light passing through the outer lens 40. Thereby, a stop lamp is realized.

[0060] At this time, since the visual sensitivity of a p-type color vision person is high (higher than red light) and higher-luminance amber light is mixed, the brightness is improved by 10.8% compared with the case where no amber light is mixed (see FIG. 3). As a result, a p-type color vision person can recognize that the vehicle signal lamp (stop lamp) is lit.

[0061] In addition, since the ratio of red light to amber light is adjusted (set) such that the chromaticity range of the light obtained by mixing red light and amber light is x > 0.71 and y < 0.289, a person with normal color vision can recognize it as red. In particular, since the first light source 20A emits red light including a wavelength of 620 nm or more, a person with normal color vision can recognize it as dark red.

[0062] As described above, according to this embodiment, a person with protan type color vision can recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

[0063] This is because it is provided with a second light source 20B that emits amber light with high visibility (higher than that of red light) for a person with protan type color vision.

[0064] Also, according to this embodiment, it is possible to provide a vehicle lamp that allows a person with normal color vision to recognize it as red and allows a person with protan type color vision to recognize whether a vehicle signal lamp (for example, a stop lamp, a tail lamp) is lit or not.

[0065] The reason why a person with normal color vision can recognize it as red is that the ratio of red light to amber light after passing through the outer lens 40 is adjusted (set) such that the chromaticity range of the light obtained by mixing red light and amber light is x > 0.71 and y < 0.289.

[0066] The reason why a person with protan type color vision can recognize whether the vehicle signal lamp 10 (for example, a stop lamp, a tail lamp) is lit or not is that it is provided with a second light source 20B that emits amber light with high visibility (higher than that of red light) for a person with protan type color vision.

[0067] Also, according to this embodiment, it is possible to satisfy the standards (chromaticity ranges) of stop & tail lamps in North America and Europe.

[0068] In addition, according to the present embodiment, since the number of the first light source 20A that emits red light and the number of the second light source that emits amber light can be minimized, it can contribute to cost reduction. Further, since the mixing ratio of the amber light and the red light can be easily adjusted, it is possible to provide a stop & tail lamp with surface emission that can be visually recognized even by a P-type color vision person who has difficulty seeing red (especially deep red).

[0069] This is because the ratio of the red light and the amber light after passing through the outer lens 40 is adjusted (set) so that the chromaticity range of the light obtained by mixing the red light and the amber light is x > 0.71 and y < 0.289.

[0070] Next, a modified example will be described. <Modified Example 1> In the above embodiment, an example in which LEDs are used as the first light source 20A and the second light source 20B has been described, but the present invention is not limited to this. For example, a first organic EL (organic EL panel; hereinafter also referred to as the first organic EL 20A) that emits red light may be used as the first light source 20A, and a second organic EL (organic EL panel; hereinafter also referred to as the second organic EL 20B) that emits amber light may be used as the second light source 20B.

[0071] FIG. 8(a) is a top view of a vehicle lamp 10A (modified example) using the first organic EL 20A and the second organic EL 20B, and FIG. 8(b) is a perspective view of the first organic EL 20A and the second organic EL 20B extracted from FIG. 8(a).

[0072] The outer shapes of the first organic EL 20A and the second organic EL 20B are, for example, rectangular (see FIG. 8(b)), but may be of any shape. As shown in FIGS. 8(a) and 8(b), the first organic EL 20A and the second organic EL 20B are arranged in a state of overlapping in the thickness direction. In FIG. 8(a), the first organic EL 20A and the second organic EL 20B are arranged in this order toward the light irradiation direction, but they may be arranged in the reverse order.

[0073] When the first organic EL 20A and the second organic EL 20B are lit simultaneously, the amber light Ray emitted by the second organic EL 20B arranged behind the first organic EL 20A 20B passes through the first organic EL 20A (see Fig. 8(a)). The red light Ray emitted by the first organic EL 20A 20A and the amber light Ray that has passed through the first organic EL 20A 20B are transmitted through the outer lens 40 as a mixture of the two and irradiated rearward. At this time, the outer lens 40 emits light by the light in which the red light Ray 20A transmitted through the outer lens 40 and the amber light Ray 20B are mixed.

[0074] In this modification as well, the ratio of the integrated intensities of the red light and the amber light after passing through the outer lens 40 (hereinafter simply referred to as the ratio of the red light and the amber light) is adjusted (set) so that the chromaticity range of the light mixed with the red light and the amber light is x > 0.71 and y < 0.289 so that a person with normal color vision can recognize it as red.

[0075] This modification can also achieve the same effects as the above-described embodiment. <Modification 2> Further, for example, a first film light source that emits red light as the first light source 20A (hereinafter also referred to as the first film light source 20A) and a second film light source that emits amber light as the second light source 20B (hereinafter referred to as the second film light source) may be used.

[0076] Fig. 9(a) is a top view of the vehicle lamp 10B (modification) using the first film light source 20A and the second film light source 20B, and Fig. 9(b) is a perspective view of the first film light source 20A and the second film light source 20B extracted from Fig. 9(a).

[0077] As shown in Fig. 9(b), the first film light source 20A is a film-shaped light source including a flexible transparent film fa and a plurality of semiconductor light-emitting elements 20a (LEDs) that emit red light and are fixed in a state of being two-dimensionally arranged on at least the surface of the transparent film fa. Similarly, the second film light source 20B is a film-shaped light source including a flexible transparent film fb and a plurality of semiconductor light-emitting elements 20b (LEDs) that emit amber light and are fixed in a state of being two-dimensionally arranged on at least the surface of the transparent film fb. Since the film light source is described, for example, in Japanese Patent Application Laid-Open No. 2020-042917, further description thereof will be omitted.

[0078] The outer shapes of the first film light source 20A and the second film light source 20B are, for example, rectangular (see Fig. 9(b)), but may be of any shape. As shown in Figs. 9(a) and 9(b), the first film light source 20A and the second film light source 20B are arranged in a state of overlapping in the thickness direction. In Fig. 9(a), the first film light source 20A and the second film light source 20B are arranged in this order toward the light irradiation direction, but they may be arranged in the reverse order.

[0079] When the first film light source 20A and the second film light source 20B are lit simultaneously, the amber light Ray emitted by the second film light source 20B arranged behind the first film light source 20A 20B passes through the first film light source 20A (see Fig. 9(a)). The red light Ray emitted by the first film light source 20A 20A and the amber light Ray that has passed through the first film light source 20A 20B are transmitted through the outer lens 40 as light in which both are mixed and irradiated rearward. At this time, the outer lens 40 emits light by the red light Ray 20A and the amber light Ray 20B that are mixed in the light transmitted through the outer lens 40.

[0080] In this modified example as well, the ratio of the integrated intensities of the red light and the amber light after passing through the outer lens 40 (hereinafter simply referred to as the ratio of the red light and the amber light) is adjusted (set) so that the chromaticity range of the light obtained by mixing the red light and the amber light satisfies x > 0.71 and y < 0.289, so that a person with normal color vision can recognize it as red.

[0081] This modified example can also achieve the same effects as the above-described embodiment.

[0082] In the above-described embodiment, an example in which a light guide plate is used as the optical component 30 has been described, but the present invention is not limited to this.

[0083] That is, the optical component 30 may have any configuration as long as it can control the red light emitted from the first light source 20A and the amber light emitted from the second light source 20B so that the light obtained by mixing the red light emitted from the first light source 20A and the amber light emitted from the second light source 20B passes through the outer lens 40. For example, although not shown, it may be a light guide rod, a reflector, a convex lens, or a concave lens. <Modified Example 3> FIG. 10(a) is a top view of a vehicle lamp 10C (modified example) using a reflector (hereinafter also referred to as reflector 30) as the optical component 30.

[0084] The reflector 30 includes, for example, a parabolic reflecting surface (for example, a multi-reflector). The optical axis AX of the reflector 30 30 extends in the X direction. The first light source 20A and the second light source 20B are mounted adjacent to each other on the substrate K and are disposed near the focal point of the reflector 30 (parabolic reflecting surface).

[0085] When the first light source 20A and the second light source 20B are turned on simultaneously, the red light Ray emitted from the first light source 20A 20A and the amber light Ray emitted from the second light source 20B 20B are reflected by the reflector 30 (parabolic reflecting surface), and the red light Ray emitted from the first light source 20A 20Aand the amber light Ray emitted by the second light source 20B 20B is transmitted through the outer lens 40 and irradiated rearward as the mixed light. At this time, the outer lens 40 emits light by the light in which the red light Ray 20A transmitted through the outer lens 40 and the amber light Ray 20B are mixed.

[0086] In addition, also in this modified example, the ratio of the integrated intensities of the red light and the amber light after passing through the outer lens 40 (hereinafter simply referred to as the ratio of the red light and the amber light) is adjusted (set) so that the chromaticity range of the light mixed with the red light and the amber light is x > 0.71 and y < 0.289 so that a person with normal color vision can recognize it as red.

[0087] Also by this modified example, the same effects as those of the above-described embodiment can be obtained. <Modified Example 4> FIG. 10(b) is a top view of a vehicle lamp 10D (modified example) using two reflectors (hereinafter also referred to as a first reflector 30A and a second reflector 30B) as the optical component 30.

[0088] The first reflector 30A and the second reflector 30B include, for example, a parabolic reflecting surface (for example, a multi-reflector). The first light source 20A is disposed near the focal point of the first reflector 30A (parabolic reflecting surface). The second light source 20B is disposed near the focal point of the second reflector 30B (parabolic reflecting surface).

[0089] The optical axis (not shown) of the first reflector 30A extends in the X direction. On the other hand, the optical axis (not shown) of the second reflector 30B is such that the amber light Ray 20B reflected by the second reflector 30B is the red light Ray 20A reflected by the first reflector 30A in a predetermined region on a virtual screen (installed at a position separated from the vehicle lamp 10D by a predetermined distance).extends in a direction inclined with respect to the X direction so as to overlap. Conversely, the optical axis (not shown) of the second reflector 30B may extend in the X direction. On the other hand, the optical axis (not shown) of the first reflector 30A is the red light Ray reflected by the first reflector 30A 20A is the amber light Ray reflected by the second reflector 30B in a predetermined region on the virtual screen 20B and may extend in a direction inclined with respect to the X direction so as to overlap.

[0090] When the first light source 20A and the second light source 20B are lit simultaneously, the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B are reflected by the first reflector 30A and the second reflector 30B, and the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B are mixed and transmitted through the outer lens 40 and irradiated rearward. At this time, the outer lens 40 emits light by the light in which the red light and the amber light transmitted through the outer lens 40 are mixed.

[0091] In this modification as well, the ratio of the integrated intensities of the red light and the amber light after passing through the outer lens 40 (hereinafter, simply referred to as the ratio of the red light and the amber light) is adjusted (set) so that the chromaticity range of the light mixed with the red light and the amber light is x > 0.71 and y < 0.289 so that a person with normal color vision can recognize it as red.

[0092] This modification can also achieve the same effects as the above-described embodiment. <Modification 5> FIG. 11(a) is a top view of a vehicle lamp 10E (modification) using a convex lens (hereinafter, also referred to as convex lens 30) as the optical component 30.

[0093] The optical axis AX of the convex lens 30 30It extends in the X direction. The first light source 20A and the second light source 20B are mounted adjacent to each other on the substrate K and are arranged near the focal point of the convex lens 30.

[0094] When the first light source 20A and the second light source 20B are lit simultaneously, the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B pass through the convex lens 30, and the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B are mixed and transmitted through the outer lens 40 and irradiated rearward as light. At this time, the outer lens 40 emits light by the light in which the red light Ray 20A transmitted through the outer lens 40 and the amber light Ray 20B are mixed.

[0095] In this modification as well, the ratio of the integrated intensities of the red light and the amber light after passing through the outer lens 40 (hereinafter simply referred to as the ratio of the red light and the amber light) is adjusted (set) so that the chromaticity range of the light obtained by mixing the red light and the amber light is x > 0.71 and y < 0.289 so that a person with normal color vision can recognize it as red.

[0096] Note that instead of the convex lens 30, a concave lens or other lenses may be used. <Modification 6> This modification can also achieve the same effects as the above-described embodiment.

[0097] FIG. 11(b) is a top view of a vehicle lamp 10F (modification) using two convex lenses (hereinafter also referred to as a first convex lens 30A and a second convex lens 30B) as the optical component 30. The first light source 20A is arranged near the focal point of the first convex lens 30A. The second light source 20B is arranged near the focal point of the second convex lens 30B.

[0098] The optical axis (not shown) of the first convex lens 30A extends in the X direction. On the other hand, the optical axis (not shown) of the second convex lens 30B is the amber light Ray that passes through the second convex lens 30B 20B and the red light Ray that passes through the first convex lens 30A in a predetermined region on the virtual screen (installed at a position a predetermined distance away from the vehicle lamp 10F) overlap 20A and extends in a direction inclined with respect to the X direction. Conversely, the optical axis (not shown) of the second convex lens 30B may extend in the X direction. On the other hand, the optical axis (not shown) of the first convex lens 30A is the red light Ray that passes through the first convex lens 30A 20A and the amber light Ray that passes through the second convex lens 30B in a predetermined region on the virtual screen overlap 20B and may extend in a direction inclined with respect to the X direction.

[0099] When the first light source 20A and the second light source 20B are lit simultaneously, the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B pass through the first convex lens 30A and the second convex lens 30B, and the red light Ray emitted by the first light source 20A 20A and the amber light Ray emitted by the second light source 20B 20B are mixed and transmitted through the outer lens 40 and irradiated rearward. At this time, the outer lens 40 emits light by the light in which the red light Ray passing through the outer lens 40 20A and the amber light Ray 20B are mixed.

[0100] In this modification as well, the ratio of the integrated intensities of the red light and the amber light after passing through the outer lens 40 (hereinafter, simply referred to as the ratio of the red light and the amber light) is adjusted (set) so that the chromaticity range of the light mixed with the red light and the amber light is x > 0.71 and y < 0.289 so that a person with normal color vision can recognize it as red.

[0101] Note that instead of the convex lenses 30A and 30B, concave lenses or other lenses may be used.

[0102] Also, this modified example can achieve the same effects as the above-described embodiment.

[0103] In the above-described embodiment, an example in which the vehicle signal lamp of the present invention is applied to a vehicle signal lamp that functions as a stop lamp and a tail lamp has been described, but the present invention is not limited to this. For example, it may be applied to warning lights, traffic signal lights, highway sign lights, illuminations, Tokyo alerts, projected clocks, electric bulletin boards, etc., other than vehicle signal lamps.

[0104] All of the numerical values shown in the above-described embodiments are merely examples, and of course, appropriate different numerical values can be used.

[0105] Each of the above-described embodiments is merely an example in every respect. The present invention is not to be construed as being limited by the description of the above-described embodiments. The present invention can be implemented in various other forms without departing from its spirit or main features.

Description of Reference Numerals

[0106] 10... Vehicle signal lamp, 20A... First light source, 20B... Second light source, 30... Optical component (light guide plate), 30a... Main surface, 30b... Main surface, 31... End surface (light incident surface), 40... Outer lens, 50... Housing, 60... Lamp chamber

Claims

1. A first light source that emits red light, A second light source that emits amber light, and The first light source and the second light source are lit simultaneously and emit light at a higher luminous intensity in response to a braking operation, The luminous intensity of the first light source is higher than that of the second light source, An optical component that forms mixed light by mixing the red light and the amber light, A light emitting part that is located in front of the first light source, the second light source, and the optical component and emits light when the light mixed by the optical component passes through it, and The red light includes a wavelength of 620 nm or more, The amber light does not include a wavelength of 620 nm or more and has a peak wavelength of 600 nm or less, a signal lamp for vehicles.

2. The signal lamp for vehicles according to claim 1, wherein the ratio of the integrated intensities of the first light source and the second light source after passing through the light emitting part is red:amber = 100:2.7 to 4.

0.

3. The signal lamp for vehicles according to claim 1 or 2, wherein the ratio of the integrated intensities of the red light and the amber light after passing through the light emitting part is adjusted so that the chromaticity range of the light mixed with the red light and the amber light is x > 0.71 and y < 0.

289.

4. The signal lamp for vehicles according to any one of claims 1 to 3, wherein at least one of the first light source and the second light source is an LED.

5. The signal lamp for vehicles according to any one of claims 1 to 4, wherein at least one of the first light source and the second light source is an organic EL or a film light source.

6. The signal lamp for vehicles according to any one of claims 1 to 5, wherein the optical component is a light guide rod or a light guide plate.

7. The light guide plate is plate-shaped, A pair of main surfaces facing each other, An end surface provided on the side of the pair of main surfaces and into which light from the first light source and the second light source is incident, and One of the pair of main surfaces is directed in the light irradiation direction, The signal lamp for vehicles according to claim 6, wherein the other main surface is provided with a plurality of optical elements for diffusely reflecting the light from the first light source and the second light source incident from the end surface and emitting the light from one main surface.

8. The signal lamp for vehicles according to any one of claims 1 to 5, wherein the optical component is a reflector.

9. The reflector has a parabolic reflecting surface arranged to open in the light irradiation direction, The first light source and the second light source are mounted in a state adjacent to the substrate, and are arranged so as to be positioned near the focal point of the reflecting surface with the first light source and the second light source facing the reflecting surface. The vehicle signal lamp according to claim 8.

10. The vehicle signal lamp according to any one of claims 1 to 5, wherein the optical component is a concave lens.

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