JP2009206064A - Vehicular lamp - Google Patents

Abstract

An object of the present invention is to provide a vehicular lamp that can secure a stable light amount and color tone without being affected by heat generated when a light emitting source is turned on, and can be manufactured at a low cost with good work efficiency.
A red fluorescent film 44 and an orange fluorescent film 45 are provided on one surface of each of a first light transmitting portion 31, a second light transmitting portion 32, and a third light transmitting portion 33 made of a light transmitting member. And the white fluorescent film 46 are formed in a dot pattern, and the light transmitting portions 31, 32, and 33 are optically separated from each other by a light shielding portion 34 made of a light shielding member. The blue LED 1 is disposed in the vicinity of the end faces 38, 39, and 40 of the light transmitting parts 31, 32, 33, and the red fluorescent film 44 is excited from the first light transmitting part 31 by being excited by the blue light from the blue LED 1. Similarly, red light is emitted, and similarly, orange light and white light are emitted from the second light transmitting portion 32 via the orange fluorescent film 45 and the third light transmitting portion 33 via the white fluorescent film 45, respectively. .
[Selection] Figure 4

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp that includes a plurality of display function areas using LEDs as a light source, or a display function area and an illumination function area.

  Conventionally, as this type of vehicle lamp, for example, there is a rear combination lamp. Specifically, as shown in FIG. 10, the display device has a display function area such as a tail & stop lamp function area 50, a turn signal lamp function area 51, and a lighting function area such as a back lamp function area 52. In addition, LED lamps (bullet type or chip type) that emit light of a color tone corresponding to each functional area are arranged.

  In this case, an LED lamp (red LED lamp) 53 for emitting red light and an LED lamp (orange LED lamp for emitting orange light) are respectively provided in the display function areas of the tail & stop lamp function area 50 and the turn signal lamp function area 51. ) 54 is disposed, and an LED lamp (white LED lamp) 55 that emits white light is disposed in the illumination function area of the back lamp function area 52 (see, for example, Patent Document 1).

In general, the red LED lamp 53 has a peak wavelength of the emission spectrum of a red LED element serving as a light emission source in a range of about 610 nm to 630 nm, and the orange LED lamp 54 is a peak of the emission spectrum of an orange LED element serving as a light emission source. The wavelength is in the range of about 589 nm to 594 nm. The white LED lamp 55 is obtained by a combination of a blue LED element serving as a light emission source and a phosphor.
JP 2007-106383 A

  By the way, in the rear combination lamp 60 configured as described above, in the white LED lamp 55, the phosphor constituting the white LED lamp 55 similarly reduces the wavelength conversion efficiency due to the heat generated when the blue LED element constituting the white LED lamp 55 is turned on. As a result, the color tone of the light emitted from the white LED lamp 55 changes, and the amount of light emitted decreases. As a result, a change in color tone and a decrease in luminous intensity of the irradiation light from the back lamp function area 52 occur.

  In addition, in the LED lamp mounting process, it is necessary to arrange LED lamps that emit light of different colors for each functional area. Therefore, mounting work is performed by a mounting machine for each type of LED lamp, which is produced due to a decrease in work efficiency. Cost increases.

  Therefore, the present invention was devised in view of the above problems, and the object of the present invention is to ensure a stable light amount and color tone without being affected by the heat generated when the light source is turned on, and good working efficiency. It is to provide a vehicular lamp that can be manufactured at a lower cost.

  In order to solve the above-described problems, the invention described in claim 1 of the present invention is configured such that a light-transmitting plate portion serving as a bottom surface and a light-transmitting wall portion serving as one side surface are integrally formed, and the other side surface is formed. A plurality of optically separated concave portions each composed of one light-shielding partition wall portion are filled with a fluorescent resin in which different phosphors are mixed in a translucent resin, and the translucent properties of the respective concave portions are filled. The same type of LEDs are all disposed in the vicinity of the wall portion with the irradiation direction directed toward the concave portion.

  The invention described in claim 2 of the present invention is the light-shielding property according to claim 1, wherein the fluorescent resin is such that the concentration of the phosphor with respect to the translucent resin is opposed from the translucent wall portion side. It is characterized by gradually increasing toward the partition wall side.

  Further, in the invention described in claim 3 of the present invention, in any one of claims 1 and 2, the depth of each of the recesses is the light-shielding partition wall portion facing from the light-transmitting wall portion side. It is characterized by being gradually shallower toward the side.

  Moreover, the invention described in claim 4 of the present invention is that in any one of claims 1 to 3, the translucent plate portion is located on the surface opposite to the fluorescent resin or in the vicinity of the surface on the opposite side. A reflection member is provided.

  Further, in the invention described in claim 5 of the present invention, a plurality of optically separated translucent light beams in which one end face is exposed to the outside and the other end face is partitioned by one light-shielding partition wall portion. Different fluorescent films are provided in a dot pattern on one plane of the part, and all LEDs of the same type are directed to the light transmitting part near the end face exposed to the outside of the light transmitting part. It is characterized by being arranged.

  Further, in the invention described in claim 6 of the present invention, in claim 5, the dot pattern is large from the end face exposed to the outside of the translucent part toward the light-shielding partition part. The thickness is gradually increased, the thickness is gradually increased, and the interval is gradually reduced.

  Further, in the invention described in claim 7 of the present invention, in any one of claims 5 and 6, the thickness of each of the light transmitting portions is opposed to the end face exposed to the outside of the light transmitting portion. It is characterized by being gradually thinner toward the light-shielding partition wall side.

  Moreover, the invention described in claim 8 of the present invention is that, in any one of claims 5 to 7, the surface of the translucent portion opposite to the surface on which the dot pattern is formed or on the opposite side. A reflecting member is provided in the vicinity of the surface.

  According to the ninth aspect of the present invention, one end face is exposed to the outside, and the other end face is partitioned by one light-shielding partition wall, and each of the plurality of optically separated light transmitting parts. Different fluorescent films are provided on the end surfaces exposed to the outside of the light emitting unit, and light diffusion processing is performed on one plane of each of the light transmitting parts, and the same type of LEDs are provided in the vicinity of the end surface provided with the fluorescent film. Is arranged with its irradiation direction facing the light transmitting portion.

  Further, in the invention described in claim 10 of the present invention, in claim 9, the light diffusing treatment has a concavo-convex pattern, and is directed from the end face side where the fluorescent film is provided toward the light-shielding partition wall side. In the case of a concave portion, the depth is gradually increased, and in the case of a convex portion, the height is gradually increased.

  Moreover, the invention described in claim 11 of the present invention is that, in any one of claims 9 and 10, the thickness of each of the light transmitting portions is opposed to the end surface side on which the fluorescent film is provided. It is characterized by being gradually thinner toward the light shielding partition wall side.

  Moreover, the invention described in claim 12 of the present invention is the surface on the opposite side to the surface on which the light diffusion treatment of the light transmitting part is performed or the opposite side in any one of claims 9 to 11. A reflective member is provided in the vicinity of the surface.

  The present invention corresponds to each of a plurality of functional areas integrated as a vehicular lamp (for example, a tail & stop lamp functional area, a turn signal lamp functional area, and a back lamp functional area). The phosphors that emit light of different colors are arranged, and the phosphors are excited by one type of LED light source. Furthermore, the arrangement / formation state of the optical member related to the phosphor was optimized with respect to the distance from the LED light source.

  As a result, the influence of heat generated when the LED light source is turned on with respect to the phosphor is reduced, the color tone change and the light intensity decrease of the light emitted from each functional region are suppressed, and the arrangement and formation of the optical members are optimized. The luminance distribution of the light emitted from the functional area is made uniform, and the light source is composed of one kind of LED, so that the reduction of the LED mounting work efficiency is suppressed, and the increase in manufacturing cost can be suppressed. .

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9 (the same reference numerals are given to the same portions). The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. Unless stated to the effect, the present invention is not limited to these embodiments.

  The present invention relates to a rear combination lamp having three functional areas: a tail and stop lamp functional area that emits red light, a turn signal lamp functional area that emits orange light, and a back lamp functional area that emits white light. The light sources of light of different colors emitted from the functional area are all LEDs, and the LED light sources are all composed of LEDs of the same color.

  FIG. 1 is an explanatory diagram illustrating the configuration of the first embodiment. The present embodiment mainly includes an LED 1 serving as a light source and a light guide lens 2 that introduces light emitted from the LED 1 and emits light having a color tone different from the light emitted from the light source.

  The LED 1 is a blue LED (for example, InGaN-based) that emits blue light.

  The light guide lens 2 includes a light transmitting part 3 made of a light transmitting member and a light shielding part 4 made of a light shielding member.

  The translucent part 3 includes a bottom 6 having an inverted V-shaped cross section in which two flat plates are in contact with each other at a predetermined angle at one top line 5, and one edge of a pair of edges of the bottom 6 parallel to the top line 5. A first wall portion 7 rising upward from the first portion, and a second wall portion 8 and a third wall portion 9 rising from the other edge so as to face the first wall portion 7 in the same plane. is doing.

  The light shielding portion 4 is located on the bottom portion 6 of the light transmitting portion 3 and has a pair of fourth wall portions 10 and a fifth wall portion 11 extending along a pair of edges perpendicular to the top line 5 of the bottom portion 6. In addition, the cross section 12 includes a crosspiece 12 that connects the wall sections 10 and 11 along the top line 5 and extends from the middle to the gap between the second wall section 8 and the third wall section 9.

  That is, the bottom part 6 of the light transmitting part 3 is a common bottom surface, and the first wall part 7 of the light transmitting part 3, the fourth wall part 10 of the light shielding part 4, the fifth wall part 11, and the crosspiece part 12 The first recessed portion 13 surrounded, the second wall portion 8 of the light transmitting portion 3, the fourth wall portion 10 of the light shielding portion 4, and the second recessed portion 14 surrounded by the crosspiece portion 12, and the light transmitting A third concave portion 15 surrounded by the third wall portion 9 of the portion 3, the fifth wall portion 11 of the light shielding portion 4, and the crosspiece portion 12 is formed.

  The surface (upper surface) of the first wall 7, the second wall 8, the third wall 9, the fourth wall 10, the fifth wall 11, and the crosspiece 12 opposite to the bottom 6. ) Are located on substantially the same plane. Further, a light reflecting film 22 is formed on the surface (lower surface) of the bottom 6 of the translucent part 3 opposite to the side where the light shielding part 4 is located.

  The depth of the first recess 13 gradually decreases from the first wall 7 side toward the opposite beam 12 side, and the second recess 14 is the opposite beam 12 from the second wall 8 side. The depth gradually decreases toward the side, and the third recess 15 is formed so that the depth gradually decreases from the third wall portion 9 side toward the opposite crosspiece portion 12 side.

  The first concave portion 13 is filled with a red fluorescent resin 17 in which a red phosphor 16 that is excited by blue light and converted into red light is mixed with the translucent resin, and red with respect to the translucent resin. The density | concentration of the fluorescent substance 16 is made high gradually toward the crosspiece 12 side from the 1st wall part 7 side.

  The second concave portion 14 is filled with an orange fluorescent resin 19 in which an orange phosphor 18 that is excited by blue light and converted into orange light is mixed with the translucent resin, and the translucent resin. The concentration of the orange phosphor 18 is gradually increased from the second wall 8 side toward the opposite beam 12 side.

  Further, the third concave portion 15 is filled with a white fluorescent resin 21 in which a white phosphor 20 that is excited by blue light and wavelength-converted into white light is mixed with the translucent resin, and the translucent resin. The concentration of the white phosphor 20 is gradually increased from the third wall 9 side toward the crosspiece 12 side.

  Since white light is obtained by mixing substantially monochromatic light, the white phosphor 20 may be composed of a mixture of a plurality of types of phosphors.

  With respect to the light guide lens 2 configured as described above, the light exit direction is outside the first wall portion 7, the second wall portion 8, and the third wall portion 9. 14 and a plurality of blue LEDs 1 are arranged so as to be the third recess 15.

  Therefore, as shown in FIG. 2 (an explanatory diagram showing the optical action of Example 1), the blue light Lb emitted from the blue LED 1 and entering the first recess 13 through the first wall portion 7 is The red light that is mainly excited directly by the red phosphor 16 and the light reflected by the light reflecting film 22 is divided into light that excites the red phosphor 16, and the red light that is excited by the red phosphor 16 and converted in wavelength. The light Lr is mixed and emitted from the light emitting surface 23 to the outside. This light emitting surface 23 that emits the red light Lr becomes a tail & stop lamp function region 26.

  At this time, the concentration of the red phosphor 16 mixed in the red phosphor resin 17 filled in the first recess 13 is gradually increased as the distance from the blue LED light source 1 increases. Therefore, the excitation probability of the red phosphor 16 is low in the region near the blue LED 1 where the amount of irradiation light is large, and the excitation probability of the red phosphor 16 is high in the region where the amount of irradiation light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  Similarly, the blue light Lb emitted from the blue LED 1 and entering the second recess 14 through the second wall portion 8 is mainly emitted by the light reflecting film 22 and the light directly exciting the orange phosphor 18. The reflected light is divided into light that excites the orange phosphor 18, and the orange light Lo that is excited by the orange phosphor 18 and wavelength-converted is mixed and emitted from the light exit surface 24 to the outside. This light emitting surface 24 that emits the orange light Lo becomes the turn signal lamp functional region 27.

  At this time, the concentration of the orange phosphor 18 mixed in the orange phosphor resin 19 filled in the second recess 14 is gradually increased as the distance from the blue LED light source 1 increases. For this reason, the excitation probability of the orange phosphor 18 is low in the region near the blue LED 1 where the amount of irradiation light is large, and the excitation probability of the orange phosphor 18 is high in the region where the amount of irradiation light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  Further, as shown in FIG. 3 (an explanatory diagram showing the optical action of Example 1), the blue light Lb emitted from the blue LED 1 and passing through the third wall portion 9 and entering the third recess 15 is The white light that is mainly directly excited by the white phosphor 20 and the light that is reflected by the light reflecting film 22 and the reflected light excites the white phosphor 20, and is white that is excited by the white phosphor 20 and wavelength-converted. The light Lw is mixed and emitted from the light emission surface 25 to the outside. The light emission surface 25 that emits the white light Lw becomes the back lamp functional area 28.

  At this time, the concentration of the white phosphor 20 mixed in the white phosphor resin 21 filled in the third recess 15 is gradually increased as the distance from the blue LED light source 1 increases. For this reason, the excitation probability of the white phosphor 20 is low in the region near the blue LED 1 where the amount of irradiation light is large, and the excitation probability of the white phosphor 20 is high in the region where the amount of irradiation light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  The light-transmitting part 3 and the light-shielding part 4 of the light guide lens 2 are collectively created by multicolor molding, and the respective fluorescent resins 17, 19, and 21 filled in the concave parts 13, 14, and 15 are made by potting mold. Is called.

  FIG. 4 is an explanatory diagram showing the configuration of the second embodiment. The present embodiment mainly includes an LED 1 serving as a light source and a light guide lens 2 that introduces light emitted from the LED 1 and emits light having a color tone different from the light emitted from the light source.

  The LED 1 is a blue LED that emits blue light.

  The light guide lens 2 has a reverse V-shaped cross section in which the upper surface is a substantially flat surface and the two lower surfaces are in contact with each other at a predetermined angle at one apex line 30, and is a first light-transmitting member made of a light-transmitting member. The light-transmitting portion 34 includes three light-transmitting portions including a portion 31, a second light-transmitting portion 32, and a third light-transmitting portion 33, and a light-blocking member.

  The light shielding portion 34 connects a pair of opposing wall portions 35 perpendicular to the top line 30 and between the wall portion 36 and the wall portions 35, 36 along the top line 30 and extends in the one direction perpendicular to the top line 30 from the middle. A crosspiece 37 is provided.

  The first translucent part 31 is surrounded on three side surfaces by the wall part 35, the wall part 36, and the crosspiece part 37 of the light shielding part 34, and the second translucent part 32 is surrounded by the wall part 35 and the crosspiece part 37 of the light shielding part 34. The third light transmitting portion 33 is surrounded by the wall portion 36 and the crosspiece portion 37 of the light shielding portion 34. The three light transmitting portions 31, 32, 33 and the light shielding portion 34 of the light guide lens 2 are collectively created by multicolor molding.

  That is, the first light transmitting portion 31 gradually decreases in thickness from the exposed end surface 38 without being surrounded by the light shielding portion 34 toward the crosspiece 37, and the second light transmitting portion 32 is provided with the light shielding portion 34. The thickness gradually decreases from the exposed end face 39 without being surrounded by the edge to the opposite crosspiece 37, and the third light transmitting part 33 is opposite to the exposed end face 40 without being surrounded by the light shielding part 34. The thickness gradually decreases toward 37.

  The light reflecting film 22 is formed on the lower surfaces of at least the first light transmitting part 31, the second light transmitting part 32, and the third light transmitting part 33.

  On the light emitting surface 41 of the first light transmitting portion 31, a plurality of red fluorescent films 44 made of red phosphor 16 that is excited by blue light and wavelength-converted to red light are provided in a dot pattern. The size of the dot pattern is gradually increased from the end face 38 side of the light transmitting portion 31 toward the opposite crosspiece 37 side, the thickness is gradually increased, and the interval is gradually reduced.

  In addition, a plurality of orange fluorescent films 45 made of an orange phosphor 18 that is excited by blue light and wavelength-converted to orange light are provided in a dot pattern on the light emitting surface 42 of the second light transmitting portion 32. At the same time, the size of the dot pattern is gradually increased from the end face 39 side of the second light transmitting portion 32 toward the opposite crosspiece 37 side, the thickness is gradually increased, and the interval is gradually reduced.

  Further, a plurality of white fluorescent films 46 made of white phosphor 20 that is excited by blue light and wavelength-converted into white light are provided in a dot pattern on the light emitting surface 43 of the third light transmitting portion 33. At the same time, the size of the dot pattern is gradually increased from the end face 40 side of the third light transmitting portion 33 toward the opposite crosspiece 37 side, the thickness is gradually increased, and the interval is gradually reduced.

  Since white light is obtained by mixing substantially monochromatic light, the white phosphor 20 may be composed of a mixture of a plurality of types of phosphors. The red fluorescent film 44, the orange fluorescent film 45, and the white fluorescent film 46 are all formed by printing means such as screen printing or silk printing.

  With respect to the light guide lens 2 configured as described above, the light emitting direction is provided outside the end face 38 of the first light transmitting portion 31, the end face 39 of the second light transmitting portion 32, and the end face 40 of the third light transmitting portion 33. A plurality of blue LEDs 1 are arranged so as to be the first light-transmitting part 31, the second light-transmitting part 32, and the third light-transmitting part 33, respectively.

  Therefore, as shown in FIG. 5 (an explanatory diagram showing the optical action of Example 2), the blue light Lb emitted from the blue LED 1 and passing through the end face 38 and entering the first light transmitting portion 31 is mainly The light that directly excites the red fluorescent film 44 and the light that is reflected by the light reflecting film 22 and the reflected light excites the red fluorescent film 44. The red light Lr that is excited by the red fluorescent film 44 and wavelength-converted. The mixed light is emitted to the outside. This light emitting surface 41 that emits the red light Lr becomes the tail & stop lamp function region 26.

  At this time, the dot pattern formed by the red fluorescent film 44 provided on the light emitting surface 41 of the first light transmitting portion 31 gradually increases in size, gradually increases in thickness, and gradually increases in distance from the blue LED light source 1. It is narrowed to. For this reason, the excitation probability of the red fluorescent layer 44 is low in a region near the blue LED 1 where the amount of irradiation light is large, and the excitation probability of the red fluorescent layer 44 is high in a region where the amount of irradiation light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  Similarly, the blue light Lb emitted from the blue LED 1 and entering the second light transmitting part 32 through the end face 39 is mainly reflected by the light that directly excites the orange fluorescent film 45 and the light reflecting film 22. Thus, the reflected light is divided into light that excites the orange phosphor film 45, and mixed light of the orange light Lo that is excited by the orange phosphor film 45 and converted in wavelength is emitted to the outside. This light emitting surface 42 that emits Lo orange light serves as the turn signal lamp functional region 27.

  At this time, the dot pattern formed by the orange fluorescent film 45 provided on the light emitting surface 42 of the second light transmitting portion 32 gradually increases in size, gradually increases in thickness, and gradually increases in distance from the blue LED light source 1. It is narrowed to. For this reason, the excitation probability of the orange fluorescent layer 45 is low in the region near the blue LED 1 where the amount of irradiation light is large, and the excitation probability of the orange fluorescent layer 45 is high in the region where the amount of irradiation light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  In addition, as shown in FIG. 6 (an explanatory diagram showing the optical action of Example 2), the blue light Lb emitted from the blue LED 1 and passing through the end face 40 and entering the third light transmitting portion 33 is mainly The white light Lw that is directly excited by the white fluorescent film 46 and the light that is reflected by the light reflecting film 22 and the reflected light excites the white fluorescent film 46. The white light Lw is excited by the white fluorescent film 46 and wavelength-converted. The mixed light is emitted to the outside. The light emitting surface 43 that emits the white light Lw becomes the back lamp functional area 28.

  At this time, the dot pattern formed by the white fluorescent film 46 provided on the light emitting surface 43 of the third light transmitting portion 33 gradually increases in size, gradually increases in thickness, and gradually increases in distance from the blue LED light source 1. It is narrowed to. Therefore, the excitation probability of the white fluorescent layer 46 is low in a region near the blue LED 1 where the amount of irradiated light is large, and the excitation probability of the white fluorescent layer 46 is high in a region where the amount of irradiated light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  FIG. 7 is an explanatory diagram showing the configuration of the third embodiment. In the present embodiment, for the light guide lens 2, the configuration of the light guide lens 2 has three light transmitting portions (a first light transmitting portion 31, a second light transmitting portion 32, and a third light transmitting portion 33. ) And the light shielding part 34, and the shapes of the light transmitting parts 31, 32, 33 and the light shielding part 34 are the same as those in the second embodiment. On the other hand, the difference between the present embodiment and the second embodiment is that, in the second embodiment, the fluorescent film is provided on the light emitting surface of each light transmitting portion, whereas in the present invention, the fluorescent film is provided on each light transmitting portion. A light diffusing process is applied to the light exit surface of each light transmitting portion.

  Specifically, a red fluorescent film 44 made of a red phosphor 16 that is excited by blue light and wavelength-converted to red light is provided on the end face 38 of the first light transmitting portion 31 over substantially the entire surface. In addition, the light emitting surface 41 is provided with a concavo-convex pattern portion 47, and the concavo-convex pattern portion 47 is deep in the case of a concave portion from the end surface 38 side of the first light transmitting portion 31 toward the opposite crosspiece 37 side. The depth is gradually increased, and in the case of the convex portion, the height is gradually increased, and the intervals are narrowed.

  In addition, an orange phosphor film 45 made of an orange phosphor 18 that is excited by blue light and wavelength-converted to orange light is provided on the end face 39 of the second light transmitting portion 32 over substantially the entire surface. Further, the light emitting surface 42 is provided with a concavo-convex pattern portion 47, and the concavo-convex pattern portion 47 is deep in the case of a concave portion from the end surface 39 side of the second light transmitting portion 32 toward the opposite crosspiece 37 side. The depth is gradually increased, and in the case of the convex portion, the height is gradually increased, and the intervals are narrowed.

  Further, a white phosphor film 46 made of white phosphor 20 that is excited by blue light and wavelength-converted to white light is provided on the end face 40 of the third light transmitting portion 33 over substantially the entire surface. Further, the light emitting surface 43 is provided with a concavo-convex pattern portion 47, and the concavo-convex pattern portion 47 is deep in the case of a concave portion from the end face 40 side of the third light transmitting portion 33 toward the opposite crosspiece 37 side. The depth is gradually increased, and in the case of the convex portion, the height is gradually increased, and the intervals are narrowed.

  The concavo-convex pattern portion 47 is formed by printing means such as embossing with a metal mold at the time of molding each light transmitting portion, screen printing or silk printing.

  Therefore, as shown in FIG. 8 (an explanatory diagram showing the optical action of Example 3), the blue light Lb emitted from the blue LED 1 is excited by the red fluorescent film 44 on the end face 38 and the wavelength-converted red light Lr is converted into the first light Lr. The red light Lr incident on the first translucent part 31 and incident on the first translucent part 31 is mainly reflected by the light reflecting film 22 and the light directly reaching the concavo-convex pattern part 47 so that the reflected light is uneven. It is divided into light reaching the pattern portion 47, and the diffused light of the red light Lr diffused by the uneven pattern portion 47 is emitted to the outside. This light emitting surface 41 that emits the red diffused light DLr becomes the tail & stop lamp function region 26.

  At this time, the concave-convex pattern portion 47 provided on the light emitting surface 41 of the first light-transmitting portion 31 gradually increases in depth in the case of a concave portion and increases in height in the case of a convex portion as the distance from the blue LED light source 1 increases. It is gradually higher, and the intervals are gradually narrowed. Therefore, in the region close to the blue LED 1 where the amount of irradiation light is large, the diffusivity in the uneven pattern portion 47 is low, and in the region where the amount of irradiation light far from the blue LED 1 is small, the diffusion rate in the uneven pattern portion 47 is high. A uniform luminance distribution can be obtained.

  Similarly, the blue light Lb emitted from the blue LED 1 is excited by the orange fluorescent film 45 on the end face 39 and the wavelength-converted orange light Lo enters the second light transmitting portion 32, and the second light transmitting portion 32. The orange light incident inside is mainly divided into light that directly reaches the concavo-convex pattern portion 47 and light that is reflected by the light reflecting film 22 and the reflected light reaches the concavo-convex pattern portion 47, and is diffused by the concavo-convex pattern portion 47, respectively. The diffused light of the orange light Lo is emitted to the outside. This light emitting surface 42 that emits the orange diffused light DLo becomes the turn signal lamp functional region 27.

  At this time, the concave-convex pattern portion 47 provided on the light emitting surface 42 of the second light transmitting portion 32 gradually increases in depth in the case of a concave portion and increases in height in the case of a convex portion as the distance from the blue LED light source 1 increases. It is gradually higher, and the intervals are gradually narrowed. Therefore, in the region close to the blue LED 1 where the amount of irradiation light is large, the diffusivity in the uneven pattern portion 47 is low, and in the region where the amount of irradiation light far from the blue LED 1 is small, the diffusion rate in the uneven pattern portion 47 is high. A uniform luminance distribution can be obtained.

  Further, as shown in FIG. 9 (an explanatory diagram showing the optical action of Example 3), the blue light Lb emitted from the blue LED 1 is excited by the white fluorescent film 46 on the end face 40 and the wavelength-converted white light Lw is the first light. The white light Lw incident on the third translucent portion 33 and incident on the third translucent portion 33 is reflected mainly by the light reflecting film 22 and the light directly reaching the concave / convex pattern portion 47, and the reflected light is uneven. It is divided into light reaching the pattern portion 47, and the diffused light of the white light Lw diffused by the uneven pattern portion 47 is emitted to the outside. This light emitting surface 43 that emits the white diffused light DLw becomes the back lamp functional area 28.

  At this time, the concave / convex pattern portion 47 provided on the light emitting surface 43 of the third light transmitting portion 33 gradually increases in depth in the case of a concave portion and increases in height in the case of a convex portion as it moves away from the blue LED light source 1. It is gradually higher, and the intervals are gradually narrowed. Therefore, the diffusivity in the concavo-convex pattern portion 47 is low in the region near the blue LED 1 where the amount of irradiation light is large, and the diffusivity in the concavo-convex pattern portion 47 is high in the region where the amount of irradiation light far from the blue LED 1 is small. A uniform luminance distribution can be obtained.

  In the first to third embodiments, a reflective member may be separately provided instead of the reflective film. Further, the reflective film and the reflective member are not necessarily provided.

  Although not shown, the outermost surface of each light emitting surface is less than blue light in order to prevent excitation of the phosphor by external light and to prevent blue light from being emitted from the blue LED light source. A reflective film that reflects light in the short wavelength region is provided.

  As described above, the present invention provides each of a plurality of functional areas (for example, a tail & stop lamp functional area, a turn signal lamp functional area, and a back lamp functional area) integrated as a vehicle lamp. Phosphors that emit light of different color tones are arranged corresponding to each functional region, and these phosphors are excited by one type of LED.

  As a result, since there is a distance between the phosphor and the LED light source, the influence of the heat generated when the LED light source is turned on with respect to the phosphor is reduced, and the color tone change and the light intensity decrease of the light emitted from each functional area are suppressed. The

  Moreover, since all the light sources are comprised by one type of LED, the working efficiency at the time of LED mounting does not fall, and the raise of manufacturing cost can be suppressed.

  In addition, the arrangement and formation of optical members such as phosphors and phosphor films, and optical processing parts by light diffusion processing are optimized with respect to the distance from the LED light source, and uniform brightness over the entire functional area. Output light exhibiting a distribution can be obtained.

2 is an explanatory diagram illustrating a configuration of Example 1. FIG. FIG. 3 is an explanatory diagram showing an optical action of Example 1. Similarly, it is explanatory drawing which shows the optical effect | action of Example 1. FIG. 6 is an explanatory diagram illustrating a configuration of Example 2. FIG. FIG. 6 is an explanatory diagram showing an optical action of Example 2. Similarly, it is explanatory drawing which shows the optical effect | action of Example 2. FIG. FIG. 10 is an explanatory diagram illustrating a configuration of Example 3. FIG. 6 is an explanatory view showing an optical action of Example 3. Similarly, it is explanatory drawing which shows the optical effect | action of Example 3. FIG. It is explanatory drawing which shows a prior art example.

Explanation of symbols

1 LED
2 light guide lens 3 light transmitting portion 4 light shielding portion 5 top line 6 bottom portion 7 first wall portion 8 second wall portion 9 third wall portion 10 fourth wall portion 11 fifth wall portion 12 crosspiece portion 13 1st recessed part 14 2nd recessed part 15 3rd recessed part 16 Red fluorescent substance 17 Red fluorescent resin 18 Orange fluorescent substance 19 Orange fluorescent resin 20 White fluorescent substance 21 White fluorescent resin 22 Light reflecting film 23 Light emitting surface 24 Light emitting surface 25 Light exit surface 26 Tail & stop lamp functional area 27 Turn signal lamp functional area 28 Back lamp functional area 30 Top line 31 First light transmitting part 32 Second light transmitting part 33 Third light transmitting part 34 Light shielding part 35 Wall part 36 Wall part 37 Crosspiece 38 End face 39 End face 40 End face 41 Light exit face 42 Light exit face 43 Light exit face 44 Red fluorescent film 45 Orange fluorescent film 46 White fluorescent film 47 Uneven pattern part

Claims (12)

  A plurality of optically separated recesses each composed of a translucent plate portion serving as a bottom surface and a translucent wall portion serving as one side surface, and the other side surface including a light-shielding partition wall portion. Inside, a fluorescent resin in which different phosphors are mixed in a translucent resin is filled, and all the same types of LEDs are arranged in the vicinity of the translucent wall portion of each concave portion so that the irradiation direction faces the concave portion. A vehicular lamp characterized by being made.   2. The fluorescent resin according to claim 1, wherein a concentration of the phosphor with respect to the light-transmitting resin is gradually increased from the light-transmitting wall portion side toward the light-shielding partition wall portion side. The vehicle lamp as described in 2.   The depth of each said recessed part is gradually shallow toward the said light-shielding partition part side which opposes from the said translucent wall part side, Either of Claim 1 or 2 characterized by the above-mentioned. Vehicle lamps.   4. The vehicle according to claim 1, wherein a reflective member is provided on a surface of the translucent plate portion opposite to the fluorescent resin or in the vicinity of the opposite surface. Light fixture.   Different fluorescent films are dot-patterned on one plane of a plurality of optically separated translucent parts, with one end face exposed to the outside and the other end face partitioned by one light-shielding partition. A vehicular lamp characterized in that the same type of LEDs are disposed in the vicinity of the end face exposed to the outside of the light transmitting portion with the irradiation direction directed toward the light transmitting portion.   The dot pattern gradually increases in size from the end surface exposed to the outside of the translucent portion toward the light-shielding partition wall, and gradually increases in thickness, and the interval gradually decreases. The vehicular lamp according to claim 5.   The thickness of each said translucent part is gradually thinned toward the said light-shielding partition part side facing from the end surface side exposed to the outside of the said translucent part. The vehicle lamp according to any one of the above.   The reflective member is provided in the vicinity of the surface on the opposite side to the surface in which the said dot pattern of the said translucent part is formed, or the surface on the opposite side, The any one of Claims 5-7 characterized by the above-mentioned. The vehicle lamp as described.   One end face is exposed to the outside, and the other end face is partitioned by one light-shielding partition, and a plurality of optically separated translucent parts are provided on the end faces exposed to the outside, and different fluorescent films are provided. In addition, a light diffusion process is performed on one plane of each of the light-transmitting portions, and all LEDs of the same type are disposed in the vicinity of the end surface provided with the fluorescent film with the irradiation direction directed toward the light-transmitting portions. A vehicular lamp characterized by the above.   The light diffusion treatment has a concavo-convex pattern, and the depth is gradually deepened in the case of a concave portion toward the light-shielding partition wall side facing from the end surface side where the fluorescent film is provided, and the height in the case of a convex portion. The vehicular lamp according to claim 9, wherein the vehicular lamp is gradually higher and the intervals are gradually narrowed.   The thickness of each said translucent part is gradually thinned toward the said light-shielding partition part side which opposes from the end surface side in which the said fluorescent film was provided. Item 1. A vehicle lamp according to item 1.   The reflective member is provided in the vicinity of the surface on the opposite side to the surface where the said light-diffusion process of the said translucent part is performed, or the surface on the opposite side, The any one of Claims 9-11 characterized by the above-mentioned. The vehicle lamp as described in 2.

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