Vehicle lamp

Abstract

Provided is a vehicle lamp capable of causing emitted light emitted from a lamp lens to the outside to satisfy a vehicle regulation. The invention includes a lamp housing (2) that forms a lamp chamber (23), a lamp lens (3), and an excitation light irradiation unit (4) and a light conversion unit (5) disposed in the lamp chamber (23). The lamp lens (3) is composed of a red lens. As a result, in the invention, most of the emitted light emitted from the lamp lens (3) to the outside is secondary light L2, and thus the vehicle regulation can be satisfied.

Description

Technical Field

[0001] This invention relates to vehicle lighting fixtures. Background Technology

[0002] As a vehicle lamp that utilizes secondary light (photoluminescence, photoluminescence) emitted by excitation light irradiated from an excitation light source, there is, for example, the lamp shown in Patent Document 1.

[0003] The vehicle lamp of Patent Document 1 includes: an excitation light source that irradiates excitation light; a light-emitting layer that emits secondary light (red light) from the excitation light (blue light) irradiated from the excitation light source; a holding member that holds the light-emitting layer; and a lamp lens (lens member) that emits secondary light to the outside.

[0004] The vehicle lamp of Patent Document 1 emits surface light by emitting secondary light from the light-emitting layer. Moreover, the vehicle lamp of Patent Document 1 uses a light-emitting layer that does not require electrical energy as a surface light source, thus improving the reliability of the surface light source compared to organic light-emitting diodes that require electrical energy as a surface light source.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: International Publication No. 2019 / 245030 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] In this vehicle lighting system, it is important that the emitted light (mainly secondary light) from the lamp lens meets vehicle regulations.

[0010] The problem to be solved by the present invention is to provide a vehicle lamp in which the emitted light from the lamp lens can meet the vehicle regulations.

[0011] Solution for solving the problem

[0012] The vehicle lamp of the present invention is characterized by comprising: a lamp housing and a lamp lens forming a lamp chamber; and an excitation light irradiation unit and a light conversion unit disposed within the lamp chamber. The excitation light irradiation unit comprises: an excitation light source that emits excitation light; and an excitation light final irradiation surface that ultimately irradiates the excitation light emitted from the excitation light source onto the light conversion unit. The light conversion unit comprises: a light-emitting film that emits secondary light through the excitation light irradiated from the excitation light final irradiation surface; a reflective film that reflects the secondary light emitted from the light-emitting film toward the light-emitting film side; and a secondary light emission surface that emits the secondary light toward the lamp lens side. The dominant wavelength of the excitation light is shorter than 500 nm, the dominant wavelength of the secondary light is longer than 500 nm, and the lamp lens is composed of a red lens.

[0013] In the vehicle lamp of the present invention, the lamp lens is preferably composed of a red lens with the following characteristics: the transmittance of the excitation light is 10% or less in the wavelength region of the excitation light, and the transmittance of the secondary light is 80% or more in the wavelength region of the secondary light.

[0014] In the vehicle lamp of the present invention, the lamp lens is preferably composed of a red lens with a transmittance of less than 10% for excitation light with a wavelength of 500 nm and a transmittance of more than 80% for secondary light with a wavelength of 650 nm.

[0015] In the vehicle lamps of the present invention, the reflective film is preferably made of a reflective material having a reflectivity of 20% or more in the wavelength region of visible light.

[0016] In the vehicle lamp of the present invention, it is preferable that the excitation light final illumination surface is disposed on the lamp lens side relative to the secondary light emission surface.

[0017] In the vehicle lamp of the present invention, it is preferable that the excitation light source is disposed on the opposite side of the lamp lens relative to the secondary light emission surface, and an optical component is disposed on the lamp lens side relative to the secondary light emission surface, and the optical component is provided with an excitation light final illumination surface.

[0018] In the vehicle lamp of the present invention, it is preferable that the excitation light source is disposed on the opposite side of the lamp lens relative to the secondary light emission surface, and an optical component is disposed between the lamp lens side and the excitation light source relative to the secondary light emission surface, and the optical component is provided with an excitation light final illumination surface.

[0019] Invention Effects

[0020] The vehicle lamp of the present invention enables the emitted light from the lamp lens to meet vehicle regulations. Attached Figure Description

[0021] Figure 1 This is a schematic longitudinal sectional view showing Embodiment 1 of the vehicle lamp of the present invention.

[0022] Figure 2 This is a partially enlarged, roughly longitudinal sectional view of the light conversion unit.

[0023] Figure 3 This is a partially enlarged diagram illustrating the optical path of the excitation light and the optical path of the secondary light in the optical conversion unit.

[0024] Figure 4 This is a diagram illustrating the dominant wavelengths of white light, yellow-orange light (amber light), and red light. The vertical axis represents the relative luminous intensity (au), and the horizontal axis represents the wavelength (nm).

[0025] Figure 5This is a diagram illustrating the reflectivity of different materials used in reflective films. The vertical axis represents reflectivity (%), and the horizontal axis represents wavelength (nm).

[0026] Figure 6 This is an explanatory graph showing the spectral transmittance of the lamp lens (red lens). The vertical axis represents transmittance (%), and the horizontal axis represents wavelength (nm).

[0027] Figure 7 This is a schematic longitudinal sectional view showing Embodiment 2 of the vehicle lamp of the present invention.

[0028] Figure 8 This is a schematic longitudinal sectional view showing Embodiment 3 of the vehicle lamp of the present invention.

[0029] Figure 9 This is a front view of the vehicle lamp in the non-lit state of Embodiment 4 of the present invention.

[0030] Figure 10 This is a front view of a vehicle lamp showing the state of its illuminated panel when lit.

[0031] Figure 11 This is a longitudinal sectional view showing the main components of vehicle lighting fixtures. Figure 9 Sectional view along line XI-XI in the middle Figure 10 (The XI-XI line section view).

[0032] Figure 12 It is a three-dimensional view showing a part of the light-emitting device of a vehicle lamp.

[0033] Figure 13 This is a schematic three-dimensional diagram showing the light-emitting device of a vehicle's lamps.

[0034] Figure 14 It refers to the luminous appearance design of the luminous panel, and is an explanatory diagram representing different luminous patterns with the same luminous shape.

[0035] Figure 15 It is the light-emitting appearance design of the light-emitting panel configured within a predetermined light distribution, and it is an explanatory diagram showing different light-emitting patterns and different light-emitting shapes.

[0036] Figure 16 This is a longitudinal sectional view (with) a modified example of the excitation light control component of a vehicle lighting device. Figure 11 (Corresponding sectional view).

[0037] Figure 17 This is a longitudinal sectional view (with) a modified example of the excitation light control component of a vehicle lighting device. Figure 11 , Figure 16 (Corresponding sectional view).

[0038] Figure 18 This is a longitudinal sectional view (with) a modified example of the light conversion unit of a vehicle lighting device. Figure 11 , Figure 16 , Figure 17 (Corresponding sectional view).

[0039] Figure 19 This is a modified example of a light-emitting panel for a vehicle lighting device. Figure 19 (A) is a partial enlarged rough longitudinal sectional view of the light-emitting panel. Figure 19 (B) is a magnified illustration of the optical path of the excitation light and the optical path of the secondary light in the light-emitting panel. Detailed Implementation

[0040] Hereinafter, four embodiments (examples) of the vehicle lamp of the present invention will be described in detail based on the accompanying drawings. In this specification, front, rear, top, bottom, left, and right refer to the front, rear, top, bottom, left, and right sides when the vehicle lamp of the present invention is mounted on a vehicle. Figures 11 to 13 , Figures 16 to 18 In the diagram, the symbols "F" represent "front," "B" represents "rear," "U" represents "top," "DE" represents "bottom," "L" represents "left," and "R" represents "right." Here, the front side is the rear side of the vehicle, and the back side is the front side. Furthermore, in the accompanying drawings, since this is a schematic diagram, only the main parts are shown, and the parts other than the main parts are omitted. Additionally, some of the shaded lines on the parts are omitted.

[0041] (Explanation of the structure of Implementation Method 1)

[0042] Figures 1 to 6 This describes Embodiment 1 of the vehicle lamp of the present invention. Hereinafter, the structure of the vehicle lamp of Embodiment 1 will be described.

[0043] (Description of vehicle lighting fixture 1)

[0044] Figure 1 In this embodiment, symbol 1 represents a vehicle lamp. In this example, vehicle lamp 1 is a taillight constituting a rear combination lamp. Furthermore, vehicle lamp 1 can be a parking light, a taillight-parking light combination, or a turn signal light, in addition to being a taillight. Vehicle lamp 1 is installed on the left and right sides of the rear of a vehicle (not shown).

[0045] like Figure 1 As shown, the vehicle lamp 1 includes a lamp housing 2, a lamp lens 3, an excitation light illumination unit 4, and a light conversion unit 5.

[0046] (Description of lamp housing 2)

[0047] The lamp housing 2 is made of an opaque component (such as a resin component). In this example, the lamp housing 2 is black. However, it is acceptable as long as the inner surface of the lamp housing 2 (the surface facing the lamp chamber 23) is black. Alternatively, the lamp housing 2 can also be a color other than black.

[0048] (Explanation of Lamp Lens 3)

[0049] The lamp lens 3 is constructed from light-transmitting resin components such as PMMA and PC. The lamp lens 3 is a transparent outer cover or lens. The lamp lens 3 is mounted on the lamp housing 2. Therefore, as... Figure 1 As shown, the lamp housing 2 and the lamp lens 3 form the lamp chamber 23.

[0050] (Explanation of excitation light irradiation unit 4)

[0051] like Figure 1 As shown, the excitation light irradiation unit 4 is disposed inside the lamp chamber 23. The excitation light irradiation unit 4 has an excitation light source 40 and an excitation light final irradiation surface 41.

[0052] The excitation light source 40 is one or more blue LEDs, using blue LEDs with a dominant wavelength of 450nm. Alternatively, other light sources besides blue LEDs, such as LDs (semiconductor lasers), can also be used as the excitation light source 40.

[0053] Excitation light source 40 emits excitation light L1 (reference) Figure 1 as well as Figure 3 (Solid arrow in the image). The excitation light L1 emitted from the excitation light source 40 of the blue LED is blue light with a dominant wavelength of 450nm. In addition, the excitation light L1 can also be violet light, ultraviolet light, etc., with a wavelength shorter than blue light.

[0054] Here, Figure 4 The white light W shown (refer to) Figure 4 The white light W (the curve shown by the dashed line in the diagram) is obtained by combining the excitation light source 40 of the blue LED and the yellow phosphor. That is, the white light W is obtained by mixing the blue light emitted from the excitation light source 40 of the blue LED and the yellow light emitted from the yellow phosphor excited by that blue light. The dominant wavelength of this white light W is 450 nm. The dominant wavelength of the excitation light L1 of the blue light emitted from the excitation light source 40 of the blue LED is approximately the same as the dominant wavelength of the white light W, which is 450 nm. Thus, the dominant wavelength of the excitation light L1 of the blue light emitted from the excitation light source 40 of the blue LED is shorter than 500 nm.

[0055] The excitation light final illumination surface 41 is disposed in the excitation light source 40 facing the secondary light emission surface 52 of the light conversion unit 5 (described later). The excitation light final illumination surface 41 will ultimately illuminate the light conversion unit 5 with the excitation light L1 emitted from the excitation light source 40.

[0056] (Description of optical conversion unit 5)

[0057] like Figure 1 As shown, the light conversion unit 5 is disposed within the lamp chamber 23. Figure 1 , Figure 2 as well as Figure 3 As shown, the light conversion unit 5 has a substrate (support substrate) 50, a light-emitting film (light-emitting layer) 51, a secondary light-emitting surface 52, a reflective film (reflective layer) 53, a reflective surface 54, and sealing elements 55 and 56.

[0058] The substrate 50 is composed of a light-transmitting resin component such as PMMA or PC, which allows the excitation light L1 and the secondary light L2 (described later) to pass through, or light-transmitting glass. The substrate 50 can be flexible or rigid. The substrate 50 is rectangular, square, or free-form.

[0059] A light-emitting film 51 is formed (deposited) on one side of the substrate 50 (the side opposite to the side facing the lamp lens 3). The light-emitting film 51 uses an organic material with a dominant wavelength of 630 nm. Furthermore, the material of the light-emitting film 51 is composed of at least one of organic phosphor materials, organic phosphor materials, or inorganic phosphor materials. The light-emitting film 51 is radiated omnidirectionally by the excitation light L1 irradiated from the excitation light final irradiation surface 41 of the excitation light irradiation unit 4 (see reference). Figure 3 The circle in the middle emits secondary light (reference). Figure 1 as well as Figure 3 (The dashed arrow in the middle).

[0060] Second-order optical L2 is Figure 4 The yellow-orange light A, indicated by the dotted-dash curve, or Figure 4 The red light R is shown as a solid line curve. The dominant wavelength of the yellow-orange light A is 590nm, which is longer than 500nm. The dominant wavelength of the red light R is 650nm, which is also longer than 500nm. Thus, the dominant wavelength of the secondary light L2 is longer than 500nm and longer than the dominant wavelength of the excitation light L1 (450nm). Furthermore, in this example, the secondary light L2 is the red light R used in taillights. Besides taillights, the red light R is also used in parking lights and taillight-stop lights. Additionally, the yellow-orange light A is used in turn signals.

[0061] The light-emitting film 51 has a secondary light-emitting surface 52. The secondary light-emitting surface 52 is disposed on the surface of the light-emitting film 51 on the substrate 50 side (the surface on the lamp lens 3 side). The secondary light-emitting surface 52 causes the secondary light L2 to be emitted towards the lamp lens 3 side. The secondary light-emitting surface 52 has a rectangular, square, or free-form planar shape that is slightly smaller than the substrate 50. The emission direction D of the secondary light L2 emitted from the secondary light-emitting surface 52 towards the lamp lens 3 side (refer to...) Figure 1 The dashed arrow of the secondary beam L2 in the image is perpendicular to the secondary beam exit surface 52.

[0062] As a result, the vehicle lamp 1 emits light from a rectangular, square, or free-form surface by means of secondary light L2 emitted from the secondary light emitting surface 52, which is rectangular in shape. Furthermore, the emitting area of ​​the secondary light emitting surface 52 is a total area of ​​10 mm². 2 That concludes the above. Therefore, the regulations for brightly lit vehicles are met.

[0063] The reflective film 53 is formed (filmed) on one side of the substrate 50 in such a way as to cover the light-emitting film 51. The reflective film 53 is made of a reflective material with a reflectivity of more than 20% in the wavelength region of visible light, such as aluminum, silver, other metals, or alloys thereof.

[0064] The metallic material of the reflective film 53 has Figure 5 The reflectance is shown. In Figure 5 In this study, tungsten (W), with its low reflectivity, exhibits a reflectivity of over 28% in the lower limit of the visible light wavelength region (400 nm). Therefore, even though the metallic material of the reflective film 53 is tungsten (W), the reflectivity in the visible light wavelength region is over 20%. Consequently, even if there are deviations in reflectivity due to manufacturing tolerances, the reflective film 53 can absorb these deviations.

[0065] The reflective film 53 has a reflective surface 54. The reflective surface 54 is disposed on the surface of the substrate 50 and the light-emitting film 51 side (the surface of the lamp lens 3 side) in the reflective film 53. The reflective surface 54 reflects the secondary light L2 emitted from the light-emitting film 51 toward the light-emitting film 51 side.

[0066] The sealing elements 55 and 56, together with the substrate 50, seal the light-emitting film 51 and the reflective film 53. The sealing elements 55 and 56 are composed of silicone resin, SiN film, etc. 55, and an aluminum wheel 56. Furthermore, the sealing elements 55 and 56 are not limited in this example.

[0067] (Description of the configuration of excitation light illumination unit 4 and light conversion unit 5)

[0068] Both the excitation light illumination unit 4 and the light conversion unit 5 are disposed within the lamp chamber 23. The excitation light source 40 is disposed on the side of the lamp lens 3 relative to the light conversion unit 5.

[0069] Therefore, the excitation light final illumination surface 41 of the excitation light source 40 is positioned on the lamp lens 3 side relative to the secondary light emission surface 52 of the light conversion unit 5. The excitation light final illumination surface 41 is contained within a configuration angle θ1 (approximately 15° in this example) of less than 90° (up, down, left, and right) relative to the normal N drawn from the secondary light emission surface 52 along the emission direction D of the secondary light L2. That is, the excitation light final illumination surface 41 and the secondary light emission surface 52 are face to face.

[0070] (Explanation of the red lens and lens 3)

[0071] The lamp lens 3 is composed of a red lens. The lamp lens 3, composed of a red lens, has... Figure 6 The characteristics of the spectral transmittance curve shown are illustrated.

[0072] exist Figure 6 In the graph, the horizontal axis represents the wavelength of light (in nm), and the vertical axis represents the transmittance of light (in %). Figure 6 In the example, the lamp lens 3 exhibiting the characteristics shown by the dashed line (spectral transmittance curve) has a thickness of 2 mm. Additionally, the lamp lens 3 exhibiting the characteristics shown by the solid line (spectral transmittance curve) has a thickness of 3.2 mm. Furthermore, the red intensity of the lamp lens 3 shown by the dashed line is the same as that shown by the solid line. Moreover, if the thickness and red intensity of the lamp lens 3 are different, the characteristic curves will also be different. Figure 6 In the diagram, the portion where the dashed line overlaps with the solid line is shown by the solid line.

[0073] The thickness of the lamp lens 3, 2 mm and 3.2 mm, is the typical thickness of a lamp lens for a vehicle lamp 1. Furthermore, the red intensity of the lamp lens 3 described above is also the typical red intensity of a lamp lens for a vehicle lamp 1. Moreover, the thickness and red intensity of the lamp lens 3 are not particularly limited.

[0074] like Figure 6 As shown, since the transmittance of light with wavelengths below 550 nm is close to 0%, the lamp lens 3 essentially prevents light with wavelengths below 550 nm from being transmitted. On the other hand, as... Figure 6 As shown, since the transmittance of light with wavelengths above 650nm is close to 90%, the lamp lens 3 allows most of the light with wavelengths above 650nm to be transmitted.

[0075] Here, we explain the case where the transmittance of the lamp lens 3 deviates by 10% due to manufacturing tolerances. In this case, the transmittance of the excitation light L1 with a wavelength of 500 nm becomes 10% (refer to...). Figure 6 The small black circle at a wavelength of 500nm in the image shows that the transmittance of the secondary light L2 at a wavelength of 650nm is 80% (refer to...). Figure 6 (The small black circle at a wavelength of 650nm).

[0076] Since the transmittance of light with wavelengths below 550nm is close to 0% and the transmittance of light with wavelengths above 650nm is close to 90%, the lamp lens 3, which is composed of a red lens, can absorb the transmittance deviation caused by manufacturing tolerances.

[0077] As a result, the lamp lens 3 can be composed of the following red lens, namely, in the wavelength region of the excitation light L1 with a main wavelength shorter than 500nm, the transmittance of the excitation light L1 is less than 10%, and in the wavelength region of the secondary light L2 with a main wavelength longer than 500nm, the transmittance of the secondary light L2 is more than 80%.

[0078] As described above, the lamp lens 3 absorbs excitation light L1 with a dominant wavelength shorter than 500 nm, while allowing secondary light L2 with a dominant wavelength longer than 500 nm to pass through. As a result, the lamp lens 3 absorbs excitation light L1 with a dominant wavelength shorter than 500 nm, such as blue light, and prevents it from being emitted from inside the lamp chamber 23 to the outside. On the other hand, it allows secondary light L2 with a dominant wavelength longer than 500 nm, such as red light R, to pass through and be emitted from inside the lamp chamber 23 to the outside.

[0079] (Explanation of the function of Implementation Method 1)

[0080] The vehicle lamp 1 of this embodiment 1 has the structure described above, and its function will be explained below.

[0081] First, the excitation light source 40 of the excitation light irradiation unit 4 is lit. Then, excitation light L1 is emitted from the excitation light source 40. The excitation light L1 irradiates the light conversion unit 5 from the excitation light final irradiation surface 41 of the excitation light irradiation unit 4. The excitation light L1 passes through the substrate 50 of the light conversion unit 5 and irradiates the light-emitting film 51.

[0082] like Figure 3 As shown, the light-emitting film 51 emits secondary light L2 from all directions through the excitation light L1.

[0083] A portion of the secondary light L2 passes through the light-emitting film 51 and is reflected by the reflective surface 54 towards the light-emitting film 51. The reflected secondary light L2 then passes through the light-emitting film 51 again and is emitted from the secondary light emission surface 52 towards the lamp lens 3. The remaining light of the secondary light L2 is not reflected by the reflective surface 54, but is emitted from the secondary light emission surface 52 towards the lamp lens 3.

[0084] The excitation light L1, which passes through the light-emitting film 51 and reaches the reflective surface 54, is reflected from the reflective surface 54 toward the light-emitting film 51, thereby exciting the secondary light L2 in the light-emitting film 51. The secondary light L2 excited by the excitation light L1 is emitted from the light-emitting film 51 and emitted from the secondary light emission surface 52 toward the lamp lens 3.

[0085] Secondary light L2 (red light R) emitted from the secondary light emission surface 52 toward the lamp lens 3 passes through the substrate 50, passes through the lamp chamber 23, and passes through the lamp lens 3, illuminating the outside of the vehicle lamp 1 with a predetermined taillight light distribution pattern. At this time, the vehicle lamp 1 emits light from a rectangular, square, or free-form surface.

[0086] (Explanation of the effects of Implementation Method 1)

[0087] The vehicle lamp 1 of this embodiment 1 has the structure and function described above, and its effects will be explained below.

[0088] In the vehicle lamp 1 of Embodiment 1, the excitation light L1 emitted from the excitation light source 40 is blue light with a dominant wavelength shorter than 500 nm, and the secondary light L2 emitted from the light-emitting film 51 is red light R with a dominant wavelength longer than 500 nm. The lamp lens 3 is composed of a red lens. As a result, in the vehicle lamp 1 of Embodiment 1, the blue excitation light L1 is absorbed in the lamp lens 3 and does not escape from the lamp chamber 23 to the outside, while the secondary light L2 of red light R passes through the lamp lens 3 and is emitted from the lamp chamber 23 to the outside. Therefore, since most of the emitted light from the lamp lens 3 is the red light R of the secondary light L2, the vehicle lamp 1 of Embodiment 1 can meet the vehicle regulations.

[0089] In the vehicle lamp 1 of Embodiment 1, the lamp lens 3 is composed of a red lens such that, in the wavelength region of the blue excitation light L1 (whose dominant wavelength is shorter than 500 nm), the transmittance of the excitation light L1 is less than 10%, and in the wavelength region of the secondary light L2 of the red light R (whose dominant wavelength is longer than 500 nm), the transmittance of the secondary light L2 is more than 80%. As a result, in the vehicle lamp 1 of Embodiment 1, most of the blue excitation light L1 is absorbed by the red lens lamp lens 3, while most of the secondary light L2 of the red light R is emitted outward from the red lens lamp lens 3. Therefore, since the vehicle lamp 1 of Embodiment 1 is mostly composed of secondary red light R emitted outward from the lamp lens 3, it can meet vehicle usage requirements.

[0090] In the vehicle lamp 1 of Embodiment 1, the lamp lens 3 is composed of a red lens such that the transmittance of the blue excitation light L1 with a wavelength of 500 nm is 10% or less, and the transmittance of the secondary light L2 of the red light R with a wavelength of 650 nm is 80% or more. As a result, even if the transmittance of the lamp lens 3 of the red lens deviates due to manufacturing tolerances, the vehicle lamp 1 of Embodiment 1 can absorb this deviation. Therefore, the lamp lens 3 of the red lens can block the emission of the blue excitation light L1 to the outside without hindering the emission of the secondary light L2 of the red light R to the outside. Thus, since the vehicle lamp 1 of Embodiment 1 emits mostly secondary red light R from the lamp lens 3, it can meet vehicle regulations.

[0091] In the vehicle lamp 1 of Embodiment 1, the reflective film 53 is made of a reflective material with a reflectivity of 20% or more in the visible light wavelength region. As a result, even if the reflectivity of the reflective film 53 deviates due to manufacturing tolerances, the vehicle lamp 1 of Embodiment 1 can absorb this deviation. Therefore, in the reflective surface 54, the secondary light L2 and the excitation light L1 can be reflected towards the light-emitting film 51 side without deviation and with good efficiency. Thus, the vehicle lamp 1 of Embodiment 1 can increase the amount of secondary light L2 of the red light R emitted outward without deviation, satisfying vehicle regulations.

[0092] In the vehicle lamp 1 of this embodiment 1, the excitation light final illumination surface 41 is disposed on the lamp lens 3 side relative to the secondary light emission surface 52. The vehicle lamp 1 of this embodiment 1 enables the excitation light L1 emitted by the excitation light source 40 to be efficiently emitted from the excitation light final illumination surface 41 to the light conversion unit 5. Therefore, the vehicle lamp 1 of this embodiment 1 efficiently excites the secondary light L2 through the excitation light L1 efficiently emitted to the light conversion unit 5, and thus emits it outward from the lamp lens 3, thereby satisfying vehicle regulations.

[0093] (Explanation of the structure, function, and effects of Implementation Method 2)

[0094] Figure 7 This illustrates Embodiment 2 of the vehicle lamp of the present invention. Hereinafter, the structure, function, and effects of the vehicle lamp 1A of Embodiment 2 will be described. In the figures, [the lamp is]... Figures 1 to 6 The same symbol represents the same thing.

[0095] The vehicle lamp 1A of this embodiment 2 is a variation 4A of the excitation light irradiation unit 4 of the vehicle lamp 1 of the above embodiment 1.

[0096] That is, the excitation light source 40 of the excitation light irradiation unit 4A is disposed on the opposite side of the lamp lens 3 relative to the secondary light emission surface 52 of the light conversion unit 5. The excitation light source 40 is disposed at an angle θ2 of 90° or more (110° in this example) relative to the normal N drawn from the secondary light emission surface 52 along the emission direction D. The excitation light emission surface 42 is provided on the surface of the excitation light source 40 on the lamp lens 3 side.

[0097] A reflector 43, serving as an optical component, is disposed on the lamp lens 3 side relative to the secondary light emission surface 52. The reflector 43 has an excitation light final illumination surface 41 serving as a reflective surface. The excitation light final illumination surface 41 of the reflector 43 faces both the excitation light emission surface 42 and the light conversion unit 5. That is, the excitation light final illumination surface 41 of the reflector 43 is disposed on the lamp lens 3 side relative to the secondary light emission surface 52, and is disposed at an angle θ1 of less than 90° relative to the normal N drawn from the secondary light emission surface 52 along the emission direction D.

[0098] If the excitation light source 40 is lit, the excitation light L1 is emitted from the excitation light emission surface 42 to the reflector 43, reflected by the excitation light final illumination surface 41 of the reflector 43, and finally irradiated by the excitation light final illumination surface 41 to the light conversion unit 5.

[0099] The vehicle lamp 1A of this embodiment 2 has the above-described structure and function, and can achieve the same effect as the vehicle lamp 1 of embodiment 1 described above.

[0100] (Explanation of the structure, function, and effects of Implementation Method 3)

[0101] Figure 8 This illustrates Embodiment 3 of the vehicle lamp of the present invention. Hereinafter, the structure, function, and effects of the vehicle lamp 1B according to Embodiment 3 will be described. In the figures, [the lamp is]... Figures 1 to 7 The same symbol represents the same thing.

[0102] The vehicle lamp 1B of this embodiment 3 is a variation 4B of the excitation light irradiation unit 4 of the vehicle lamp 1 of the above embodiment 1.

[0103] That is, the excitation light source 40 of the excitation light irradiation unit 4B is disposed on the opposite side of the lamp lens 3 relative to the secondary light emission surface 52 of the light conversion unit 5. The excitation light source 40 is disposed at an angle θ2 of 90° or more (110° in this example) relative to the normal N drawn from the secondary light emission surface 52 along the emission direction D. The excitation light emission surface 42 is provided on the surface of the excitation light source 40 on the lamp lens 3 side.

[0104] A light guide 44, serving as an optical component, is disposed between the lamp lens 3 and the excitation light source 40, relative to the secondary light emission surface 52. The light guide 44 has an entrance surface 45 and an excitation light final illumination surface 41, which serves as the emission surface, on both end faces. The light guide 44 is bent from the entrance surface 45 side to the excitation light final illumination surface 41 side. The entrance surface 45 of the light guide 44 faces the excitation light emission surface 42. The excitation light final illumination surface 41 of the light guide 44 faces the light conversion unit 5. That is, the excitation light final illumination surface 41 of the light guide 44 is disposed on the lamp lens 3 side relative to the secondary light emission surface 52, and is disposed at an angle θ1 of less than 90° relative to the normal N drawn from the secondary light emission surface 52 along the emission direction D.

[0105] If the excitation light source 40 is lit, the excitation light L1 is emitted from the excitation light emission surface 42 and enters the light guide 44 from the light guide 44 injection surface 45. It is guided in the light guide 44 and finally illuminates the light conversion unit 5 from the excitation light final illumination surface 41 of the light guide 44, which is the emission surface.

[0106] The vehicle lamp 1B of this embodiment 3 has the above-described structure and function, and therefore can achieve the same effect as the vehicle lamps 1 and 1A of embodiments 1 and 2 described above.

[0107] (Explanation of the structure of Implementation Method 4)

[0108] Figures 9 to 15 This describes embodiment 4 of the vehicle lamp of the present invention. The structure of the vehicle lamp of embodiment 4 will be described below.

[0109] (Description of vehicle lighting fixture 1E)

[0110] Figures 9 to 11 In this embodiment, symbol 1E refers to the vehicle lamp of embodiment 4. In this example, as described above, the vehicle lamp 1E is the taillight that constitutes the rear combination lamp.

[0111] Vehicle lamps 1E are mounted on the left and right sides of the rear of a vehicle (not shown). The light distribution of the taillights of vehicle lamps 1E is relative to the reference axis Z (refer to...). Figures 11 to 13 The light distribution range (illumination range) has a predetermined angle in the left-right and up-down directions. The reference axis Z is parallel to the vehicle's direction of travel (the vehicle's front-to-back direction).

[0112] The vehicle lamp 1E includes a lamp housing 2, an inner panel (inner housing) 20, a lamp lens 3, and a light-emitting device 10 (hereinafter referred to as "light-emitting device 10") of the vehicle lamp of this embodiment 4.

[0113] (Description of lamp housing 2)

[0114] As described above, the lamp housing 2 is made of an opaque component (such as a resin component). In this example, the lamp housing 2 is black. Furthermore, the inner surface of the lamp housing 2 (the surface facing the lamp chamber 23) can also be black. Alternatively, the lamp housing 2 can be any color other than black.

[0115] (Explanation of Lamp Lens 3)

[0116] As described above, the lamp lens 3 is made of a light-transmitting resin component such as PMMA or PC. The lamp lens 3 is a transparent outer cover, outer lens, etc. In this example, the lamp lens 3 is made of a red lens. However, the lamp lens 3 can also be made of a colorless lens other than a red lens, or a yellow-orange lens. The lamp lens 3 is mounted on the lamp housing 2. Thus, as... Figures 9 to 11 As shown, the lamp housing 2 and the lamp lens 3 form the lamp chamber 23.

[0117] (Explanation of inner panel 20)

[0118] The inner panel 20 is disposed along the lamp lens 3 within the lamp chamber 23 from the center to the lower side. Furthermore, the inner panel 20 is positioned between the lamp lens 3 and the excitation light irradiation unit 4E of the light-emitting device 10, which will be described later. The inner panel 20 is mounted to the lamp housing 2 via a mounting member (not shown).

[0119] The inner panel 20 is made of an opaque component (such as a resin component). In this example, the inner panel 20 is black, just like the lamp housing 2. Furthermore, the surfaces of the inner panel 20, namely the outer surface (facing the lamp lens 3) and the inner surface (facing the lamp chamber 23), can be black. Alternatively, the inner panel 20 can be a color other than black, and at least one of the outer or inner surfaces can be a color other than black or be metal-plated.

[0120] (Explanation of the light-emitting device 10)

[0121] like Figure 13 As shown, in this example, three sets of light-emitting devices 10 are arranged on the left and right sides within the lamp chamber 23. Figures 11 to 13 As shown, the three light-emitting devices 10 are respectively equipped with an excitation light irradiation unit 4E and a light conversion unit 5E.

[0122] (Explanation of excitation light irradiation unit 4E)

[0123] like Figure 11 As shown, in this example, the excitation light irradiation unit 4E is disposed in the portion from the center to the lower side within the lamp chamber 23. The excitation light irradiation unit 4E is mounted to the lamp housing 2 via a mounting member (not shown). As described above, an inner panel 20 is disposed between the excitation light irradiation unit 4E and the lamp lens 3.

[0124] like Figures 11 to 13As shown, the excitation light illumination unit 4E includes an excitation light source 40E, a reflective component 41E as an excitation light control component, and a bracket 42E. The excitation light source 40E and the reflective component 41E are respectively mounted on the bracket 42E. The excitation light source 40E is disposed on the lamp lens 3 side. The reflective component 41E is disposed on the lamp housing 2 side. The bracket 42E is disposed between the excitation light source 40E and the reflective component 41E. The bracket 42E is mounted on the lamp housing 2 side via a mounting component (not shown). As a result, the excitation light illumination unit 4E is mounted on the lamp housing 2 side.

[0125] (Explanation of excitation light source 40E)

[0126] like Figures 11 to 13 As shown, the excitation light source 40E has a substrate 400 and left and right light-emitting elements 401L and 401R. The substrate 400 is mounted on the bracket 42E via a mounting protrusion 420.

[0127] Light-emitting elements 401L and 401R are mounted on the back side of the substrate 400, facing the lamp housing 2, at two locations on the left and right sides. In this example, the light-emitting elements 401L and 401R are blue LEDs with a dominant wavelength of 450nm. The left and right light-emitting elements 401L and 401R are composed of one or more blue LEDs. Alternatively, light-emitting elements other than blue LEDs, such as LDs (semiconductor lasers), can also be used as the light-emitting elements 401L and 401R.

[0128] Excitation light source 40E emits excitation light L1 from light-emitting elements 401L and 401R (reference). Figure 11 (Solid arrow in the image). The excitation light L1 emitted from the light-emitting elements 401L and 401R of the blue LED is blue light with a dominant wavelength of 450nm. In addition, the excitation light L1 can also be violet light, ultraviolet light, etc., with a wavelength shorter than blue light.

[0129] (Description of reflective component 41E)

[0130] like Figures 11 to 13 As shown, left and right reflective surfaces 410L and 410R are formed on the front side of the reflective component 41E facing the lamp lens 3. The left and right reflective surfaces 410L and 410R face the left and right light-emitting elements 401L and 401R.

[0131] The left and right reflective surfaces 410L and 410R each have multiple segments divided longitudinally and transversely. The multiple segments of the left and right reflective surfaces 410L and 410R are arranged on a parabola with the left and right light-emitting elements 401L and 401R as the focal points in the longitudinal section (vertical section, section in the up and down direction), and are arranged on a convex curved line in the transverse section (horizontal section, section in the left and right direction). The center of the convex curved line protrudes towards the lamp lens 3 (rear side) and descends towards the lamp housing 2 (front side) as it moves towards the left and right sides.

[0132] Multiple sections of the left and right reflective surfaces 410L and 410R respectively use the excitation light L1 emitted from the left and right light-emitting elements 401L and 401R as the excitation reflected light L10 (refer to...). Figure 11 The solid arrow in the image reflects the light in a predetermined direction. As a result, the excitation reflected light L10 is controlled to be distributed as a predetermined light distribution DL and irradiates the light conversion unit 5E.

[0133] Pre-ordered light distribution DL such as Figure 15 As shown in the generally rectangular shape, the light-emitting panel 50E, which includes the light conversion unit 5E (described later), encompasses even a narrower light distribution range (the illumination range of the excitation reflected light L10) of the light-emitting film 51. Furthermore, the predetermined light distribution DL has uniform luminance (illuminance) within the light distribution range. Moreover, the predetermined light distribution DL can also have varying levels of luminance (illuminance) within the light distribution range. That is, the intensity of light within the light-emitting range can also be continuously varied.

[0134] (Instructions for bracket 42E)

[0135] like Figures 11 to 13 As shown, the bracket 42E is disposed between the excitation light source 40E and the reflector 41E. The bracket 42E has a left front panel 420L, a right front panel 420R, a left side panel 421L, a right side panel 421R, and a middle side panel 421C.

[0136] The left front panel 420L faces the left reflective surface 410L. The right front panel 420R faces both the right reflective surface 410R and the substrate 400 of the excitation light source 40E. As described above, the substrate 400 is mounted on the right front panel 420R via the mounting protrusion 420.

[0137] The left panel portion 421L bends from the left side of the left front panel portion 420L and connects to the left side of the left reflective surface 410L. The right panel portion 421R bends from the right side of the right front panel portion 420R and connects to the right side of the right reflective surface 410R. The middle side panel portion 421C bends from the right side of the left front panel portion 420L and also from the left side of the right front panel portion 420R. As a result, the left front panel portion 420L and the right front panel portion 420R are arranged in a staggered manner from front to back via the middle side panel portion 421C.

[0138] A left window 422L and a right window 422R are provided at the center of the lower edge of the left front panel 420L and the center of the lower edge of the right front panel 420R, respectively. As a result, the excitation light L1 emitted from the left and right light-emitting elements 401L and 401R passes through the left window 422L and the right window 422R and enters the left and right reflective surfaces 410L and 410R.

[0139] (Description of Optical Conversion Unit 5E)

[0140] like Figures 10 to 13 As shown, the light conversion unit 5E has a light-emitting panel 50E and a support column 51E as a configuration component. In this example, the light conversion unit 5E is positioned on the upper side relative to the portion of the lamp chamber 23 from the center to the upper side, namely the excitation light irradiation unit 4E.

[0141] (Description of 50E LED panel)

[0142] The light-emitting panel 50E emits secondary light L2 (refer to) through the excitation reflected light L10 emitted from the reflective component 41E. Figure 11 (solid arrow in the image), such as Figure 10 The implementation shown in the image includes a section with oblique grid lines; in this example, surface illumination is applied to the entire surface. As described above... Figure 2 as well as Figure 3 As shown, the light-emitting panel 50E is the same as the light conversion unit 5 in Embodiment 1 described above, and has a substrate (support substrate) 50, a light-emitting film (light-emitting layer) 51, a secondary light-emitting surface 52, a reflective film (reflective layer) 53, a reflective surface 54, and sealing members 55 and 56.

[0143] As described above, substrate 50 allows the excitation reflected light L10 and the secondary light L2 (described later) to pass through. Substrate 50 is... Figures 10 to 13 The shape of the plate shown. In addition, the substrate 50, besides... Figures 10 to 13 Besides the shape shown, the plate can also be rectangular, square, or any other shape. In this example, the substrate 50 is made of glass.

[0144] As described above, the light-emitting film 51 emits secondary light L2 (refer to) in all directions through the excitation reflected light L10 emitted from the reflective component 41E of the excitation light irradiation unit 4E. Figure 11 (The dashed arrow). Thus, the luminescent film 51, as... Figure 10 The implementation shown in the diagram includes a section with oblique grid lines. In this example, surface emission is performed on the entire surface. Here, the intensity of the secondary light L2 can be adjusted according to the thickness of the light-emitting film 51. That is, if the thickness of the light-emitting film 51 is increased, the secondary light L2 can be adjusted to be stronger; conversely, if the thickness of the light-emitting film 51 is decreased, the secondary light L2 can be adjusted to be weaker.

[0145] In this example, the appearance design of the light-emitting film 51 is as follows: Figures 10 to 13 As shown, it is formed in a shape that is one size smaller than that of the substrate 50. As a result, the light-emitting film 51 is as follows... Figure 10 The portion shown in the example has oblique grid lines, forming a luminous surface with an arbitrary appearance design. As mentioned above, in this example, the secondary light L2 is red light.

[0146] (Description of the luminous appearance design of the 50E luminous panel)

[0147] The luminous appearance design of the luminous panel 50E can be arbitrarily changed by altering the appearance design (pattern, shape, graphic, shape, etc.) of the luminous film 51.

[0148] For example, such as Figures 10 to 13 , Figure 14 As shown in (A)(B)(C)(D), the light-emitting panel 50E can form different light-emitting patterns in the same light-emitting shape. Figure 14 (A) is a full-surface luminous pattern. Figure 14 (B) is the bamboo basket hole pattern (bamboo basket hole design). Figure 14 (C) is a hemp leaf pattern (hemp leaf design). Figure 14 (D) is a horizontal stripe pattern (a horizontal stripe pattern where the central horizontal stripe is wider, and the width of the horizontal stripes gradually decreases as you move up and down). Furthermore... Figure 14 In the diagram, the parts shown in grayscale and highlighted in dark gray are the light-emitting parts.

[0149] In addition, such as Figure 15 As shown in (A)(B)(C)(D), the light-emitting panel 50E can form different light-emitting appearance designs (light-emitting shapes and light-emitting patterns) within a predetermined light distribution DL. Figure 15 (A) and (B) are in the same luminous shape. Figure 15 (A) is a full-surface luminous pattern. Figure 15 (B) is a luminous pattern of horizontally elongated column groups. Figure 15 (C) is a light-emitting design with three horizontal stripes running vertically. Figure 15 (D) features a luminous design with three horizontal V-shaped elements on the left and right. Furthermore, in Figure 15 In the predetermined light distribution DL, the blue of the excitation reflected light L10 is implemented in the part with oblique grid shadow lines ( Figure 15 (B) The part that is blacked out is red with secondary light L2.

[0150] In addition, the above Figure 14 as well as Figure 15 This is an example of the luminous appearance design of the luminous panel 50E, which is infinitely variable.

[0151] (Description of support column 51E, first mounting component 511 and second mounting component 512)

[0152] like Figure 11 , Figure 12As shown, the support column 51E is a flat, quadrangular prism shape. At one end of the support column 51E, a light-emitting panel 50E is mounted via a first mounting component 511. The other end of the support column 51E is mounted to the lamp housing 2 via a second mounting component 512.

[0153] At least one of the first mounting component 511 or the second mounting component 512 is configured to be detachable. The first mounting component 511 and the second mounting component 512 are, for example, composed of bolts and nuts, magnets, screws, fittings, etc.

[0154] The support column 51E positions the light-emitting panel 50E within the light distribution DL in a predetermined orientation. Specifically, the support column 51E is the surface of the light-emitting panel 50E, causing the light-emitting surface of the light-emitting film 51 to be tilted relative to the direction of illumination of the excitation reflected light L10 from the reflective member 41E, and facing the lamp lens 3. In this example, the substrate 50 of the light-emitting panel 50E faces the lamp lens 3. Furthermore, the sealing fasteners 55 and 56 of the light-emitting panel 50E are detachably mounted to the support column 51E via the first mounting member 511.

[0155] In this example, the support column 51E, the first mounting component 511, and the second mounting component 512 are the same as the lamp housing 2, and are black. Furthermore, the surfaces of the support column 51E, the first mounting component 511, and the second mounting component 512 (the surfaces facing the lamp chamber 23) only need to be black. Alternatively, the support column 51E, the first mounting component 511, and the second mounting component 512 can also be a color other than black.

[0156] (Explanation of the function of Implementation Method 4)

[0157] The vehicle lamp 1E of this embodiment 4 has the structure described above, and its function will be explained below.

[0158] First, when the light-emitting elements 401L and 401R on the left and right sides of the excitation light source 40E of the excitation light irradiation unit 4E are in an off state, the light-emitting panel 50E is in a non-light-emitting state. Therefore, if one observes the inside of the lamp chamber 23 through the lamp lens 3, it appears as follows: Figure 9 As shown, the light-emitting panel 50E in its non-emitting state is inconspicuous; only the black of the lamp housing 2, the support column 51E, the first mounting component 511, and the second mounting component 512 are visible. Furthermore, in Figure 9 In the diagram, the lamp housing 2, the support column 51E, the first mounting component 511, and the second mounting component 512 are shown in black desaturated form.

[0159] Then, the light-emitting elements 401L and 401R on the left and right sides of the excitation light source 40E of the excitation light irradiation unit 4E are lit. Excitation light L1 (blue light) is then emitted from the light-emitting elements 401L and 401R. The excitation light L1 is reflected as excitation reflected light L10 in multiple sections of the reflective surfaces 410L and 410R on the left and right sides of the reflective component 41E of the excitation light irradiation unit 4E in a predetermined direction. The excitation reflected light L10 is controlled to have a predetermined light distribution DL and is directed towards the light conversion unit 5E.

[0160] The light-emitting film 51 of the light-emitting panel 50E of the light-emitting unit 5E emits secondary light L2 (red light) in all directions by being irradiated by the excitation reflected light L10 controlled to a predetermined light distribution DL.

[0161] A portion of the secondary light L2 passes through the light-emitting film 51 and is reflected by the reflective surface 54 towards the light-emitting film 51. The reflected secondary light L2 passes through the light-emitting film 51 again and is emitted from the secondary light emission surface 52 towards the lamp lens 3. The remaining light of the secondary light L2 is not reflected by the reflective surface 54, but is emitted from the secondary light emission surface 52 towards the lamp lens 3.

[0162] The excitation reflected light L10, which passes through the light-emitting film 51 and reaches the reflective surface 54, is reflected from the reflective surface 54 toward the light-emitting film 51, thereby exciting the secondary light L2 in the light-emitting film 51. The secondary light L2 excited by the excitation reflected light L10 is emitted from the light-emitting film 51 and emitted from the secondary light emission surface 52 toward the lamp lens 3.

[0163] Secondary light L2 emitted from the secondary light emission surface 52 towards the lamp lens 3 passes through the substrate 50, through the lamp chamber 23, and through the lamp lens 3, illuminating the exterior of the vehicle lamp 1E with a predetermined taillight light distribution pattern. At this time, the light-emitting film 51 emits light from the surface, forming... Figure 10 , Figure 14 as well as Figure 15 The luminous surface is as shown.

[0164] Therefore, as Figure 10 As shown, the luminous surface of the light-emitting film 51 can be observed and confirmed through the lamp lens 3 in the upper half of the lamp chamber 23. In addition, the black (or a color other than black) of the inner panel 20 can be seen in the lower half of the lamp chamber 23.

[0165] (Explanation of the effects of Implementation Method 4)

[0166] The vehicle lamp 1E and the light-emitting device 10 of the vehicle lamp 1E (hereinafter referred to as "vehicle lamp 1E and light-emitting device 10") of Embodiment 4 have the structure and function described above, and their effects will be explained below.

[0167] The vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 include: an excitation light source 40E that emits excitation light L1; a reflective member 41E that controls the excitation light L1 emitted from the excitation light source 40E to a predetermined light distribution DL and irradiates it; a light-emitting panel 50E that emits secondary light L2 by emitting excitation reflected light L10 irradiated from the reflective member 41E; and a support 51E that arranges the light-emitting panel 50E within the light distribution DL and serves as a configuration member.

[0168] As a result, the vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 can efficiently irradiate the light conversion unit 5E with the excitation light L1 from the excitation light source 40E of the excitation light irradiation unit 4E as the excitation reflected light L10 through the excitation light control function of the reflective member 41E.

[0169] The vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 include at least one of a first mounting member 511 or a second mounting member 512. The first mounting member 511 can replaceably mount the light-emitting panel 50E to the excitation light source 40E and the reflector 41E and the support column 51E of the excitation light irradiation unit 4E. The second mounting member 512 can replaceably mount the light-emitting panel 50E and the support column 51E of the light conversion unit 5E to the excitation light source 40E and the reflector 41E of the excitation light irradiation unit 4E.

[0170] As a result, the vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 can have their light-emitting panel 50E replaced by the first mounting member 511, which is configured to be detachable, or the light-emitting panel 50E and the support column 51E can be replaced by the second mounting member 512, which is configured to be detachable. Therefore, the vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 can easily change the light-emitting appearance design of the light-emitting panel 50E, and furthermore, can significantly alter the aesthetic appearance.

[0171] In addition, the vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 share the lamp housing 2, lamp lens 3, excitation light irradiation unit 4E and support column 51E through the first mounting member 511, so that the light-emitting panel 50E of the light conversion unit 5E can be replaced, or the lamp housing 2, lamp lens 3 and excitation light irradiation unit 4E share the lamp housing 2, lamp lens 3 and excitation light irradiation unit 4E through the second mounting member 512, so that the light-emitting panel 50E and support column 51E of the light conversion unit 5E can be replaced.

[0172] As a result, the vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 can share the lamp housing 2, the lamp lens 3, and the excitation light irradiation unit 4E, or they can share the lamp housing 2, the lamp lens 3, the excitation light irradiation unit 4E, and the support column 51E. Therefore, when the light-emitting appearance design of the light-emitting panel 50E is changed, the vehicle lamp 1E and the light-emitting device 10 of this embodiment 4 only need to change the light-emitting panel 50E, or the light-emitting panel 50E and the support column 51E, without changing many other parts. Therefore, it is not necessary to change the design of molds, resin materials, optical designs, installation spaces, layouts, etc. of many other parts, and correspondingly, the manufacturing cost can be reduced.

[0173] In the vehicle lamp 1E and light-emitting device 10 of this embodiment 4, the excitation light control component is composed of a reflective component 41E, which has reflective surfaces 410L and 410R that control the excitation light L1 as the excitation reflected light L10. As a result, the vehicle lamp 1E and light-emitting device 10 of this embodiment 4 can efficiently and effectively irradiate the light conversion unit 5E side by reflecting the excitation light L1 as the excitation reflected light L10 and controlling it to a predetermined light distribution DL through the reflective component 41E.

[0174] In the vehicle lamp 1E and light-emitting device 10 of Embodiment 4, the light-emitting panel 50E has a reflective film 53. As a result, the vehicle lamp 1E and light-emitting device 10 of Embodiment 41 can reflect the secondary light L2 emitted by the excitation reflected light L10 through the reflective film 53 to the lamp lens 3 side. Thus, the vehicle lamp 1E and light-emitting device 10 of Embodiment 41 can efficiently transmit the secondary light L2 through the lamp lens 3 and emit it to the outside of the vehicle lamp 1E.

[0175] In the vehicle lamp 1E and light-emitting device 10 of this embodiment 4, the light-emitting panel 50E includes a substrate 50, a light-emitting film 51, a secondary light-emitting surface 52, a reflective film 53, a reflective surface 54, and sealing components 55 and 56. As a result, the vehicle lamp 1E and light-emitting device 10 of this embodiment 4 do not require electrical system components such as wiring and connectors in the light-emitting panel 50E, thus becoming a thin and lightweight light-emitting panel 50E. Moreover, the thin and lightweight light-emitting panel 50E makes it inconspicuous, as if there is nothing around it.

[0176] Furthermore, in the vehicle lamp 1E and light-emitting device 10 of this embodiment 4, even in the support column 51E (including the first mounting member 511 and the second mounting member 512) that positions the light-emitting panel 50E within the predetermined light distribution DL, electrical system components such as wiring and connectors are not required, resulting in a thin and lightweight support column 51E. Moreover, the thin and lightweight support column 51E makes it inconspicuous, as if there is nothing around it.

[0177] In the vehicle lamp 1E of this embodiment 4, at least the surface of the lamp housing 2 facing the lamp chamber 23 is black. Therefore, the light-emitting panel 50E and the support column 51E (including the first mounting member 511 and the second mounting member 512) inside the lamp chamber 23 are inconspicuous due to the blackness inside the lamp chamber 23. As a result, in the vehicle lamp 1E of this embodiment 4, when the light-emitting elements 401L and 401R are in the off state, if the lamp chamber 23 is observed through the lamp lens 3, the light-emitting panel 50E and the support column 51E are inconspicuous, and the black lamp chamber 23 can be observed, making the lamp chamber 23 almost invisible.

[0178] On the other hand, in the vehicle lamp 1E of this embodiment 4, if the light-emitting elements 401L and 401R are lit, the inconspicuous light-emitting panel 50E emits light and becomes conspicuous. As a result, the vehicle lamp 1E of this embodiment 4 can make the almost invisible phenomena in the black lamp chamber 23 and the luminous phenomenon of the light-emitting panel 50E in the black lamp chamber 23 appear concrete.

[0179] In this embodiment 4, the vehicle lamp 1E has an inner panel 20 disposed between the lamp lens 3 and the excitation light irradiation unit 4E. Therefore, when the lamp chamber 23 is viewed through the lamp lens 3, the excitation light irradiation unit 4E is obscured by the inner panel 20, thereby improving the aesthetic appearance of the lamp chamber 23.

[0180] In this embodiment 4, the vehicle lamp 1E is made even less visible inside the lamp chamber 23 because the surface of the lamp housing 2 facing the lamp chamber 23, the surface of the support 51E (including the first mounting member 511 and the second mounting member 512), and the surface of the inner panel 20 are black.

[0181] The vehicle lamp 1E of this embodiment 4 has three sets of light-emitting devices 10 arranged on the left and right sides inside the lamp chamber 23. As a result, the vehicle lamp 1E of this embodiment 4 can form a light-emitting appearance design with a longer left and right light-emitting panel 50E through the three sets of light-emitting devices 10.

[0182] Furthermore, the vehicle lamp 1E of this embodiment 4 can form a long light-emitting appearance design with a horizontal, vertical, and inclined shape by arbitrarily arranging multiple light-emitting devices 10 in the lamp chamber 23, and can also form a light-emitting appearance design with a wide range of horizontal, vertical, and inclined shapes.

[0183] (Description of a modified example of the excitation light control component)

[0184] Figure 16 This refers to a modified example of the excitation light control component of a light-emitting device for vehicle lamps. Figure 16 In, with Figures 9 to 15 The same symbol represents the same thing.

[0185] The above Figures 9 to 15 The excitation light control component is a reflective component 41E, which has reflective surfaces 410L and 410R for controlling the excitation light L1 from the excitation light source 40E. In this modified example, the excitation light control component is an inner lens component 43E. The inner lens component 43E has an entrance surface 430 and an exit surface 431 for controlling the excitation light L1 from the excitation light source 40E.

[0186] In this example, the injection surface 430 has multiple prism surfaces (refracting surfaces). In this example, the emission surface 431 is planar. The injection surface 430 and the emission surface 431 cause the excitation light L1 emitted from the excitation light source 40E to be emitted as the excitation emission light L11 in a predetermined direction. As a result, the excitation emission light L11 is controlled to illuminate the light conversion unit 5E side with a predetermined light distribution DL.

[0187] The inner lens component 43E, as a modified example of the excitation light control component, has the structure described above, and therefore can achieve the same effect as the reflection component 41E described above.

[0188] Furthermore, in the above Figure 11 In this configuration, the substrate 400 of the excitation light source 40E is arranged vertically (up-down direction), the support column 51E is a horizontally oriented (left-right direction) quadrangular prism, and the excitation light source 40E and the reflector 41E are mounted on the bracket 42E. To this end, in this… Figure 16 In the figure, the substrate 400 of the excitation light source 40E is arranged in the horizontal direction (left and right direction), the support column 52E is L-shaped, and the excitation light source 40E, the inner lens component 43E and the support column 52E are mounted on the bracket 44E.

[0189] In this modified example, a prism surface is provided on the injection surface 430, but a wrinkle processing can be provided instead of a prism surface, and the inner lens component 43E can contain a light-diffusing element group (ink, paint). In addition, the prism surface and the wrinkle processing can be provided on the injection surface 431, or on both the injection surface 430 and the injection surface 431.

[0190] (Description of a modified example of the excitation light control component)

[0191] Figure 17This refers to a modified example of the excitation light control component of a light-emitting device for vehicle lamps. Figure 17 In, with Figures 9 to 16 The same symbol represents the same thing.

[0192] The above Figures 9 to 15 The excitation light control component is a reflective component 41E, which has reflective surfaces 410L and 410R for controlling the excitation light L1 from the excitation light source 40E. Additionally, the aforementioned... Figure 16 The excitation light control component is an inner lens component 43E, which has an entrance surface 430 and an exit surface 431 for controlling the excitation light L1 from the excitation light source 40E.

[0193] In response to this, the excitation light control component of this modified example enables the aforementioned... Figures 9 to 15 The reflective component 41E is the same as the above-mentioned Figure 16 It is composed of the inner lens component 43E.

[0194] The excitation light control component of this modified example has the structure described above, and therefore can achieve the same effect as described above. Figures 9 to 15 The reflective component 41E and the above-mentioned Figure 16 It has the same effect as the inner lens component 43E.

[0195] Furthermore, in the above Figure 11 In this configuration, the excitation light source 40E is disposed on the side of the lamp lens 3, and the reflector 41E is disposed on the side of the lamp housing 2. The excitation light source 40E and the reflector 41E are mounted on the bracket 42E. Furthermore, in the aforementioned... Figure 16 In the bracket 44E, an excitation light source 40E, an inner lens component 43E, and a support column 52E are installed.

[0196] In response to this, in Figure 17 In the lamp housing, excitation light source 40E is disposed on the 2nd side of the lamp housing, and reflector 41E is disposed on the 3rd side of the lamp lens. The excitation light source 40E, reflector 41E, inner lens component 43E and support column 52E are mounted on the bracket 45E.

[0197] (Explanation of a modified example of the optical conversion unit 53E)

[0198] Figure 18 This is a modified example of a light conversion unit 53E representing a light-emitting device for vehicle lamps. Figure 18 In, with Figures 9 to 17 The same symbol represents the same thing.

[0199] The above Figures 9 to 17The light conversion unit 5E has a light-emitting panel 50E, and one end of the prism-shaped support 51E and one end of the L-shaped support 52E are not separated. In contrast, the modified light conversion unit 53E has multiple (two in this example) light-emitting panels 50E, and one end of the support 54E is divided into multiple (two-pronged in this example) sections. As a result, the modified light conversion unit 53E is suitable for forming... Figure 15 (C) shows a light-emitting appearance design with three horizontal stripes running vertically.

[0200] Furthermore, in this modified example, the light conversion unit 53E is suitable for use by arranging multiple light-emitting panels 50E on the left and right sides, and dividing one end of the pillar 54E into multiple parts on the left and right sides. Figure 15 (D) shows a light-emitting design with three horizontal V-shaped patterns on the left and right.

[0201] Furthermore, the light conversion unit 53E of this modified example has the structure described above, and therefore can achieve the same effect as the light conversion unit 5E described above.

[0202] Furthermore, in the above Figure 11 In this configuration, the light conversion unit 5E is positioned above the excitation light irradiation unit 4E. Therefore, in this… Figure 18 In the middle, the light conversion unit 53E is disposed on the lower side relative to the excitation light irradiation unit 4E.

[0203] (Description of a modified example of the light-emitting panel 50A)

[0204] Figure 19 This is a modified example of a light-emitting panel 50A representing a light-emitting device for vehicle lighting. Figure 19 In, with Figures 9 to 18 The same symbol represents the same thing.

[0205] The aforementioned light-emitting panel 50E has a reflective film 53. In contrast, the light-emitting panel 50A of this modified example does not have a reflective film 53. That is, the light-emitting panel 50A of this modified example has a substrate 50, a light-emitting film 51, and a sealing element 57 (a light-transmitting horizontal wooden strip or aluminum (Al2O3), etc.).

[0206] The light-emitting panel 50A of this modified example can achieve approximately the same functional effect as the light-emitting panel 50E described above. In particular, the light-emitting panel 50A of this modified example is constructed of a light-transmitting component, therefore, when the light-emitting elements 401L and 401R are not illuminated, such as... Figure 9 As shown, if you look into the lamp chamber 23 through the lamp lens 3, it is in a transparent and invisible state (invisible state).

[0207] Furthermore, if at least the surface of the lamp housing 2 facing the lamp chamber 23, the surfaces of the supports 51E, 52E, and 54E, the surfaces of the first mounting member 511 and the second mounting member 512, and the surface of the inner panel 20 are black, then the presence of the light-emitting panel 50A in this modified example is more inconspicuous and can be made invisible inside the lamp chamber 23.

[0208] (Explanation of examples other than implementation methods 1, 2, 3, 4, and variations)

[0209] Furthermore, in the above-described embodiments 1, 2, 3, 4, and variations, examples were described where vehicle lamps 1, 1A, 1B, and 1E are taillights constituting a rear combination lamp, and the secondary light L2 is red light R. However, in this invention, vehicle lamps 1, 1A, 1B, and 1E can also be parking lights, taillight-parking lights, or turn signals, other than taillights. In the case of parking lights or taillight-parking lights, the secondary light L2 becomes red light R; in the case of turn signals, the secondary light L2 becomes yellow-orange light A.

[0210] Furthermore, in the above-described embodiments 1, 2, 3, 4, and variations, the lamp lens 3 is composed of a red lens such that, in the wavelength region of the blue excitation light L1 (with a main wavelength shorter than 500 nm), the transmittance of the excitation light L1 is 10% or less, and in the wavelength region of the secondary light L2 (with a red wavelength longer than 500 nm), the transmittance of the secondary light L2 is 80% or more. However, in this invention, the values ​​of the transmittance of the excitation light L1 and the transmittance of the secondary light L2 are not limited.

[0211] Furthermore, in the above-described embodiments 1, 2, 3, 4, and variations, the lamp lens 3 is composed of a red lens such that the transmittance of the excitation light L1 (blue light with a wavelength of 500 nm) is 10% or less, and the transmittance of the secondary light L2 (red light with a wavelength of 650 nm) is 80% or more. However, in this invention, the wavelength and transmittance of the excitation light L1, and the wavelength and transmittance of the secondary light L2 are not limited.

[0212] Furthermore, in the above-described embodiments 1, 2, 3, 4, and variations, the reflective film 53 is made of a reflective material with a reflectivity of 20% or more in the visible light wavelength region. However, in this invention, the reflectivity value or material of the reflective film 53 is not limited.

[0213] Furthermore, the present invention is not limited to the embodiments 1, 2, 3, 4, and variations described above. For example, the shape of the surface emission is not particularly limited. That is, although the secondary light emission surface 52 may be a rectangular, square, or free-form planar shape, it may also be a curved surface. In this way, surface emission of any designed shape can be obtained.

[0214] Furthermore, in the above-described embodiment 4 and its variant, the excitation light control component is composed of a combination of the reflecting component 41E, the inner lens component 43E, and the reflecting component 41E and the inner lens component 43E. However, in this invention, the excitation light control component can be, in addition to the components described above, a light guide component (light guide plate, light guide rod) having an incident surface, an exit surface, and a total reflection surface. In short, any component that controls the excitation light L1 from the excitation light source 40E and irradiates it onto the light-emitting panel 50E is acceptable.

[0215] Symbol Explanation

[0216] 1, 1A, 1B—Vehicle lamps; 2—Lamp housing; 23—Lamp chamber; 3—Lamp lens; 4, 4A, 4B—Excitation light illumination unit; 40—Excitation light source; 41—Final illumination surface of excitation light (reflecting surface of reflector 43, emission surface of light guide 44); 42—Emission surface; 43—Reflector (optical component); 44—Light guide (optical component); 45—Injection surface; 5—Light conversion unit; 50—Substrate; 51—Light-emitting film (light-emitting layer) 52—Secondary light emission surface, 53—Reflective film (reflective layer), 54—Reflective surface, 55—Sealer, 56—Sealer, A—Yellow-orange light, D—Emission direction, L1—Excitation light, L2—Secondary light, N—Normal, R—Red light, W—White light, θ1—Configuration angle, θ2—Configuration angle, 1E—Vehicle lamp, 10—Light emission device, 4E—Excitation light irradiation unit, 40E—Excitation light source, 400—Substrate, 401L, 401R—Light-emitting element, 41E—Reflective component, 410L, 410R—Reflective surface, 42E—Bracket, 420—Mounting protrusion, 420L—Left front panel, 420R—Right front panel, 421C—Middle side panel, 421L—Left side panel, 421R—Right side panel, 422L—Left window, 422R—Right window, 43E—Inner lens component, 430—Ingress surface, 431—Exgress surface, 44E— Bracket, 45E—Bracket, 5E—Light conversion unit, 50E—Light emission panel, 51E—Support, 511—First mounting component, 512—Second mounting component, 52E—Support, 53E—Light conversion unit, 54E—Support, 50A—Light emission panel, 57—Sealing fastener, B—Rear, DE—Lower, DL—Light distribution, F—Front, L—Left, L10—Excitation reflected light, L11—Excitation emitted light, R—Right, U—Upper, Z—Reference axis.

Claims

1. A vehicle lamp, characterized in that, have: The lamp housing and lamp lens, which together form the lamp chamber; and The excitation light irradiation unit and the light conversion unit are disposed in the aforementioned lamp chamber. The above-mentioned excitation light irradiation unit has: Excitation light source, which emits excitation light; and The excitation light ultimately illuminates the surface from which the excitation light emitted from the excitation source ultimately illuminates the light conversion unit. The above-mentioned optical conversion unit has: A light-emitting film that emits secondary light by means of the excitation light irradiated from the final irradiated surface of the excitation light; and A reflective film that reflects the secondary light emitted from the light-emitting film toward the light-emitting film side; as well as The secondary light emission surface directs the aforementioned secondary light towards the lamp lens side. The dominant wavelength of the excitation light mentioned above is shorter than 500 nm. The dominant wavelength of the aforementioned secondary light is longer than 500 nm. The aforementioned lamp lens is composed of a red lens. The excitation light final illumination surface is positioned on the lamp lens side relative to the secondary light emission surface. The aforementioned excitation light source is positioned on the opposite side of the aforementioned lamp lens relative to the aforementioned secondary light emission surface. Optical components are disposed between the lamp lens side and the excitation light source, relative to the aforementioned secondary light emission surface. The aforementioned optical components are provided with the final irradiation surface of the excitation light.

2. The vehicle lighting fixture according to claim 1, characterized in that, The above-mentioned lamp lens is composed of the following red lens: In the wavelength region of the aforementioned excitation light, the transmittance of the excitation light is less than 10%. In the wavelength region of the aforementioned secondary light, the transmittance of the aforementioned secondary light is above 80%.

3. The vehicle lighting fixture according to claim 1 or 2, characterized in that, The above-mentioned lamp lens is composed of the following red lens: The transmittance of the aforementioned excitation light with a wavelength of 500 nm is less than 10%. The transmittance of the aforementioned secondary light with a wavelength of 650nm is over 80%.

4. The vehicle lighting fixture according to claim 1, characterized in that, The aforementioned reflective film is made of a reflective material with a reflectivity of over 20% in the visible light wavelength region.

5. The vehicle lighting fixture according to claim 1, characterized in that, The optical component has an incident surface facing the excitation light emission surface of the excitation light source and an emission surface facing the light conversion unit as the final irradiation surface of the excitation light, and is in a shape that bends from the incident surface to the emission surface.

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