JP6659348B2 - Window rear lamp - Google Patents

Description

  The present invention relates to a window rear lamp, and more specifically, to provide a window rear lamp in which a lamp region having one lamp function or a plurality of lamp functions is provided in a part of a rear window of a vehicle.

  2. Description of the Related Art Conventionally, as a rear window (rear panel) of a vehicle integrally incorporating a vehicle lamp, for example, there is one disclosed in Patent Document 1 under the name of “vehicle lamp and vehicle rear panel”.

  As shown in FIG. 15 (enlarged sectional view of the tail & stop lamp) and FIG. 16 (explanatory diagram of the operation of the light-emitting unit), a clear window forming a rear window RW located substantially in the upper half region of the rear panel RP of the vehicle. An area excluding the rear window RW area of the integrated clear smoke resin 80 and the clear resin 82 is integrally formed with a smoke resin 80 and a clear resin 82 on the outer surface of which a light diffusion process including a number of stippling steps 81 has been performed. Is coated with a black coating film 83. Note that a protective film 86 is formed on the outer surface of the clear resin 82.

  Thus, when the LED 84 is turned on at night, a part of the light emitted from the LED 84 and incident on the clear resin 82 is diffused in the stapling step 81 while the light is guided through the clear resin 82, and the diffused light is diffused on the light emitting surface. The light emitted from the light source 85 is recognized by the viewer as light from the tail & stop lamp TSL. On the other hand, when the LED 84 is not lit in the daytime, the black paint film 83 on the inner surface is visually observed through the clear resin 82, and a black appearance is recognized.

  Therefore, when the LED 84 is turned on, the light as the tail & stop lamp TSL is emitted from the black area BA, which is an appearance black area when the LED 84 is not turned on and the presence of the tail & stop lamp TSL is not recognized. To make the viewer feel unexpected.

JP 2014-175199 A

  By the way, the rear panel RP having the above-mentioned configuration is configured such that, of the light emitted from the LED 84 and entering the clear resin 82, the light that is not diffused in the stapling step 81 during the light guide in the clear resin 82 is located ahead of it. The light enters the clear smoke resin 80 and is guided through the clear smoke resin 80 to the rear window RW region. Then, in the rear window RW region, the light is emitted toward the vehicle interior and outside the vehicle interior.

  As a result, the appearance becomes poor due to the light emitted from an unintended area, and the commercial value as a lamp decreases. In addition, when a plurality of lamp functions are provided, for example, when a tail & stop lamp function using red light and a turn signal lamp function using amber light are provided, the emission areas of the respective lights become unclear, and the colors of the respective lights are mixed. May have a chromaticity different from a desired chromaticity. That is, it is expected that problems such as a light emission range and chromaticity will occur.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicular lamp (a window rear lamp) in which a part of a rear window of a vehicle has one or more lamp functions. The present invention provides a vehicular lamp (window rear lamp) in which the areas of the respective lamp functions are clear, chromaticity problems due to color mixing can be suppressed, and light leakage does not occur in the vehicle interior. It is in.

In order to solve the above-mentioned problem, an invention described in claim 1 of the present invention is a lamp having a lamp function provided in a rear window of a vehicle, comprising a colorless and transparent transparent plate located on the outside of the vehicle and a transparent plate on the inside of the vehicle. A laminated structure in which a dark semi-transparent smoke plate and an air layer are positioned to face each other, and a light source disposed near an end of the transparent plate so that emitted light enters the transparent plate. , wherein the the transparent plate, guiding light emitted to the outside of the vehicle by the internal reflection by the plurality of total reflection surfaces which the light guided within the transparent plate is emitted is provided on the transparent plate from the light source An optical system is provided, and the total reflection surface is a side surface of a cone-shaped concave portion or a side surface of a V-shaped groove portion dispersed and arranged in a dot shape, and the smoke plate is a transparent plate. Or the concave portion of the transparent plate on the side opposite to At a position corresponding to the groove, it is characterized in further comprising a protrusion which is accommodated in the recess or the groove.

According to a second aspect of the present invention, there is provided a lamp having a lamp function provided on a rear window of a vehicle, wherein the transparent plate is located outside the vehicle and the transparent plate located inside the vehicle. A laminated structure in which a dark translucent smoke plate having a smaller refractive index is in opposing contact, and a light source arranged near the end of the transparent plate so that emitted light enters the transparent plate, wherein the the transparent plate, light guide optics light guided within the transparent plate is emitted from the light source is emitted to the outside of the vehicle by the internal reflection by the plurality of total reflection surfaces provided on the transparent plate System is provided, the total reflection surface is a side surface of a conical concave portion that is dispersedly arranged in a dot shape, or a side surface of a V-shaped groove portion, the smoke plate, the transparent plate and the transparent plate The concave portion or the concave portion of the transparent plate on the surface on the opposite side At positions corresponding to the parts, it is characterized in further comprising a protrusion which is accommodated in the recess or the groove.

Further, in the invention described in claim 3 of the present invention, the lamp having the lamp function is formed in a lamp region provided in a part of the rear window, or a lamp unit is provided on the rear window in the vehicle compartment. The present invention is characterized in that in any one of claims 1 and 2 attached as:

According to a fourth aspect of the present invention, there is provided a vehicle in which a colorless and transparent transparent plate located outside the vehicle and a dark translucent smoke plate located inside the vehicle are opposed to each other with an air layer interposed therebetween. A rear window, and a light source arranged near an end of the transparent plate so that emitted light enters the transparent plate. The vehicle rear window is a part of the vehicle rear window. A lamp function of a light guide optical system in which light emitted from the light source and guided inside the transparent plate is emitted outside the vehicle by internal reflection by a plurality of total reflection surfaces provided on the transparent plate. A lamp region and a window region having a rear window function are provided, and the transparent plate is thicker in the window region on the side farther from the lamp region to the light source than in a portion located in the lamp region. Thin and thin The have the smoked plate, the position corresponding to the thin portion of the transparent plate surface on the side facing the transparent plate, characterized in that it comprises a thick portion of the thin portion and substantially the same shape Things.

Further, according to the invention described in claim 5 of the present invention, the colorless and transparent transparent plate located on the outside of the vehicle and the dark translucent smoke plate located on the inside of the vehicle and having a smaller refractive index than the transparent plate face each other. A rear window for a vehicle that is in contact with the light source, and a light source that is disposed near an end of the transparent plate so that emitted light enters the transparent plate. In a part of a rear window, light emitted from the light source and guided inside the transparent plate is emitted from the light guiding optical system which is emitted outside the vehicle by internal reflection by a plurality of total reflection surfaces provided on the transparent plate. A lamp region having a lamp function and a window region having a rear window function are provided, and the transparent plate is positioned in the lamp region in the window region on the side farther from the lamp region to the light source. Than the part Has a thin walled portion of the thickness, the smoke plate, the position corresponding to the thin portion of the transparent plate surface on the side facing the transparent plate includes a thick portion of the thin portion and substantially the same shape It is characterized by the following.

  According to the present invention, a vehicle rear window is formed by arranging a colorless and transparent transparent plate located on the outside of the vehicle and a dark translucent smoke plate located on the inside of the vehicle so as to face each other with the air layer interposed therebetween. A part of the rear window is provided with a lamp region having a lamp function including a light guiding optical system that emits light emitted from a light source and guided inside the transparent plate to the outside of the vehicle by internal reflection by a plurality of total reflection surfaces. .

  This makes the lamp region of the vehicle rear window clear, and suppresses the emission of light from the region other than the lamp region to the inside and outside of the vehicle.

FIG. 2 is a partial cross-sectional view of the window rear lamp according to the first embodiment. It is the elements on larger scale of FIG. It is the perspective view which looked at the transparent plate concerning a 1st embodiment from the light emission side. FIG. 2 is an explanatory diagram of an optical path according to the first embodiment. It is the perspective view which looked at another transparent plate concerning a 1st embodiment from the light-emitting surface side. It is a fragmentary sectional view of the window rear lamp concerning a 2nd embodiment. It is a fragmentary sectional view of the window rear lamp concerning a 3rd embodiment. It is a fragmentary sectional view of other window rear lamps concerning a 3rd embodiment. It is a fragmentary sectional view of the window rear lamp concerning a 4th embodiment. FIG. 3 is a partial cross-sectional view of a window region. FIG. 3 is a partial sectional view of a window region. It is a fragmentary sectional view of the window rear lamp concerning a 5th embodiment. It is a fragmentary sectional view of a window rear lamp. It is a mounting view of a lamp unit. It is explanatory drawing of a conventional example. It is an explanatory view of a conventional example similarly.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 14 (the same parts are denoted by the same reference numerals). The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are added. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

  The window rear lamp of the present invention is configured by utilizing a rear window of a vehicle, and has a lamp region having a lamp function of a light guiding optical system provided in a part of the rear window.

  FIG. 1 is a partial sectional view of the first embodiment of the window rear lamp. In the first embodiment, the rear window 1 is made up of a smoke plate 15 made of a dark translucent member disposed inside the vehicle and flat on both sides, and a transparent plate 20 made of a colorless transparent member disposed outside the vehicle. It has a three-layer structure that is arranged to face each other with the air layer 30 interposed therebetween.

  In the vicinity of one end of the transparent plate 20, a light source (LED 2) whose light emission surface 2 a faces the light incident surface 21 of the end surface of the transparent plate 20 is mounted and arranged on the substrate 5.

  In a predetermined region of a surface (back surface) 22 of the transparent plate 20 on the side facing the smoke plate 15, a plurality of conical concave portions 23 are dispersed and arranged in a dot shape at a predetermined density over the entire surface of the region. I have. As shown in FIG. 2 (a partially enlarged view of FIG. 1), each of the concave portions 23 has a conical axis Z extending perpendicularly to an extension surface of the rear surface 22 of the transparent plate 20 and a side surface 23c and the axis Z The angle (θ) is set to be larger than the critical angle of the transparent plate 20 with respect to the air layer 30.

  Further, when the critical angle is smaller than 45 °, it is preferable to set the angle (θ) between the side surface 23c and the axis Z to be close to 45 °.

  The depth of the conical concave portion 23 in the thickness direction of the transparent plate 20 is, as shown in FIG. Is set to be deeper in the direction away from the LED 2. Specifically, in the first embodiment, the first concave portion 23a is provided on the side closer to the LED 2 and the second concave portion 23a is deeper and larger than the first concave portion 23a on the side farther from the LED 2 than the first concave portion 23a. Of the recess 23b.

  The transparent plate 20 is closer to the LED 2 but closer to the region where the first recess 23a is provided (the first region (S1)) and farther from the LED 2 than the first recess 23a. The lamp region (S) is constituted by the region (the second region (S2)) in which the second concave portion 23b is provided, and the window region (W) is constituted on the side farther from the LED 2 than the lamp region (S). ing. The window area (W) has the function of a conventional rear window.

  Then, when the LED 2 is turned on (emits light), the light emitted from the LED 2 enters the transparent plate 20 from the light incident surface 21 of the transparent plate 20 as shown in FIG. The light is guided along the direction. Then, a part of the light guided inside the transparent plate 20 reaches (incidents) to the side surface 23c of the first concave portion 23a at an angle larger than the critical angle with respect to the air layer 30, and the light enters the side surface 23c. The light is reflected (total reflection), guided inside the transparent plate 20 toward the light exit surface 24 on the front surface (outside of the vehicle and on the rear side of the vehicle), and emitted from the light exit surface 24 to the outside.

  Further, of the light guided through the transparent plate 20, the light that has passed through the region provided with the first concave portion 23a is the second concave portion 23b that is deeper and larger than the first concave portion 23a. Reaches (incidents) an angle greater than the critical angle with respect to the air layer 30 and is internally reflected (totally reflected) by the side surface 23c, and is guided inside the transparent plate 20 toward the front light emitting surface 24. The light exits from the light exit surface 24 to the outside.

  Thereby, the transparent plate 20 is located on the side closer to the LED 2 of the light source and provided with the first recess 23a (first region (S1)), and on the side farther from the LED 2 than the first recess 23a. The light emitted from each of the regions (the second region (S2)) provided with the deep and large second concave portion 23b forms substantially the same luminance distribution. In other words, the light emitted from the lamp region (S) formed of the first region (S1) and the second region (S2) of the transparent plate 20 has uneven brightness over the entire surface of the lamp region (S). Is suppressed, the lamp region (S) functions as a lamp function that optically integrates the first region (S1) and the second region (S2).

  As described above, the light emitted from the LED 2 and guided through the transparent plate 20 and passed through the first concave portion 23a is the second concave portion which is deeper and larger than the first concave portion 23a. Since the light is internally reflected (total reflection) on the side surface of the rear window 23b, the second concave portion 23b further blocks the progress of the rear window 1 to an area (window area) (W) other than the lamp area (S). Can be As a result, emission of light from the window area (W) of the rear window 1 to the inside and outside of the vehicle is suppressed, and the lamp area (S) becomes clear.

  Further, the smoke plate 15 is disposed on a surface of the transparent plate 20 on the side where the first concave portion 23a and the second concave portion 23b are provided (the rear surface (the inside surface of the vehicle and the front surface of the vehicle) 22). In this case, light leaked from the transparent plate 20 to the inside of the vehicle is blocked, thereby preventing the driver from generating dazzling light.

  The means for directing the light guided inside the transparent plate 20 toward the light emitting surface 24 is not necessarily limited to the plurality of recesses 23 arranged in a dot-like manner. For example, as shown in a perspective view seen from the light exit surface 24 located on the vehicle exterior side), for example, a plurality of cross sections each extending in a direction perpendicular to the light guide direction of light guided inside the transparent plate 20 have V cross sections. The U-shaped grooves (V grooves) 35 may be provided in parallel. The extending direction of the V-groove 35 is not necessarily limited to the direction perpendicular to the light guide direction of the light guided in the transparent plate 20, and the light guides the light in the transparent plate 20 depending on the inclined state of the rear window 1. It is set to an appropriate direction with respect to the light guiding direction of the light to be emitted.

  Also in this case, the depth of the V-groove 35 in the thickness direction of the transparent plate 20 is set so as to increase in the direction away from the LED 2 of the light source. If this is made to correspond to the first embodiment, the first V-groove 35a is provided on the side closer to the LED 2 and deeper than the first V-groove 35a on the side farther from the LED 2 than the first V-groove 35a. A large second V-groove 35b is provided.

  At the same time, the side surface (the surface on which the light guide light reaches (incident)) 35c of the first V-groove 35a and the second V-groove 35b located on the LED 2 side is the extension surface of the rear surface 22 of the transparent plate 20. It is inclined with respect to the perpendicular D at an angle larger than the critical angle with respect to the air layer 30.

  Also in this case, similarly to the above-described concave portion 23, when the critical angle is smaller than 45 °, the angle (α) formed by the side surface 35c and the perpendicular D of the extended surface of the rear surface 22 of the transparent plate 20 is set to around 45 °. It is preferable to set

  Thereby, it is possible to obtain almost the same optical functions and effects as in the case where the plurality of concave portions 23 are arranged in a dot shape.

  Next, a second embodiment based on the first embodiment will be described. As shown in FIG. 6 (partial sectional view of the second embodiment relating to the window rear lamp), the second embodiment is different from the first embodiment in that the smoke plate 15 is provided on the side opposed to the transparent plate 20. A convex portion 17 having substantially the same shape as the concave portion 23 is provided on the surface (front surface) 16 at a position corresponding to the concave portion 23 of the transparent plate 20, and protrudes from the smoke plate 15 via the air layer 30 into the concave portion 23 of the transparent plate 20. The convex portion 17 is accommodated.

  At the same time, the side farther from the LED 2 than the second concave portion 23b (the tip of the second concave portion 23b) is constituted by a thin portion 25 formed with a thin wall over the entire length. Similarly to the side surface 23c of each of the first concave portion 23a and the second concave portion 23b, it is inclined at an angle larger than the critical angle with respect to the air layer 30 with respect to the perpendicular (not shown) of the back surface 22 of the transparent plate 20. Was.

  In this case as well, when the critical angle is smaller than 45 °, it is preferable to set the angle between the side surface 25a and the perpendicular to the back surface 22 of the transparent plate 20 to be close to 45 ° as in the case of the above-described concave portion 23.

  Along with this, a thick portion 18 having substantially the same shape as the thin portion 25 is formed on the surface (front surface) 16 of the smoke plate 15 on the side facing the transparent plate 20 at a position corresponding to the thin portion 25 of the transparent plate 20. The thin portion 25 of the transparent plate 20 is supplemented by the thick portion 18 of the smoke plate 15 via the air layer 3. Thereby, the rear window 1 having a three-layer structure of the smoke plate 15, the air layer 30, and the transparent plate 20 can be formed with a uniform thickness over the entire surface.

  Therefore, the light emitted from the LED 2 and guided through the transparent plate 20 and passed through the first concave portion 23a and the second concave portion 23b is internally reflected (total reflection) by the side surface 25a of the thin portion 25 ahead. The light is guided inside the transparent plate 20 toward the light emitting surface 24 on the front side, and is emitted from the light emitting surface 24 to the outside.

  As described above, the light emitted from the LED 2 and guided through the transparent plate 20 and passed through the first concave portion 23a and the second concave portion 23b is shielded by the side surface 25a of the thin portion 25 and is transmitted to the thin portion 25. Since the progression is blocked and the thin portion 25 is not provided with a concave portion or a V-groove for internally reflecting light (total reflection), the light portion (S) of the rear window 1 constituted by the thin portion 25 is not provided. Further, the emission of light from the window area (W) located farther from the LED 2 to the inside and outside of the vehicle is suppressed.

  Even if light leaks from the concave portion 23 of the transparent plate 20 to the inside of the vehicle, since the convex portion 17 of the smoke plate 15 is housed close to the concave portion 23, the light reflected by the side surface 17a of the convex portion 17 The generation is suppressed, and the influence of the mixed light due to the return light (re-incident light) to the transparent plate 20 is prevented.

  Next, a third embodiment will be described. In the third embodiment, as shown in FIG. 7 (partial sectional view of the third embodiment of the window rear lamp) and FIG. 8 (partial sectional view of the third embodiment of the window rear lamp), the first embodiment In contrast to the first and second embodiments, the lamp region (S) has a three-layer structure including the smoke plate 15, the air layer 30, and the transparent plate 20, and the window region (W) includes only the smoke plate 15. Things.

  The shapes of the side surface 15a of the smoke plate 15 and the side surface 25a of the transparent plate 20 at the boundary between the lamp region (S) and the window region (W) are, for example, as shown in FIG. With respect to each of the perpendicular (not shown) of 14 and the perpendicular (not shown) of the back surface 22 of the transparent plate 20, an inclined surface having an angle larger than the critical angle with respect to the air layer 30, or as shown in FIG. , A vertical plane along each of a perpendicular (not shown) of the back surface 14 of the smoke plate 15 and a perpendicular (not shown) of the back surface 22 of the transparent plate 20 can be considered.

  When the side surface 25a of the transparent plate 20 is an inclined surface, similarly to the above-described concave portion 23, when the critical angle is smaller than 45 °, the angle between the side surface 25a and the perpendicular of the extension surface of the back surface 22 of the transparent plate 20 is set. It is preferable to set the angle to be around 45 °.

  Thereby, the rear window 1 integrated with the three-layer structure of the smoke plate 15, the air layer 30, and the transparent plate 20 and the structure of only the smoke plate 15 can be formed with a uniform thickness over the entire surface. it can. Further, by configuring the window region (W) only with the smoke plate 15, it is possible to more reliably suppress the progress of light to the window region (W).

  By the way, in the above-described first to third embodiments, the LED of the light source is arranged only at one end of the rear window. However, as a fourth embodiment, the LED is opposed to the one end of the rear window. It is also possible to adopt a configuration in which a light source is also arranged at the other end.

  In this case, the structure of the rear window is the same as that of the first to third embodiments, and the lamp region (S) is provided on both sides of the window region (W). The rear window is formed by integrally forming the rear window.

  Specifically, for example, a partial cross-sectional view of a window rear lamp according to the fourth embodiment using the configuration of the second embodiment is shown in FIG.

  As shown in FIG. 9, the first LED 3 and the second LED 4 of the light source are arranged near both ends of the rear window 1, and the first recess 23 a and the second recess 23 b are provided on the first LED 3 side. A lamp region (Sa) having a three-layer structure in which the transparent plate 20 and the smoke plate 15 provided with the protrusions 17 are arranged to face each other with the air layer 30 interposed therebetween is formed. Similarly, on the second LED 4 side, A three-layered lamp region in which a transparent plate 20 provided with a first concave portion 23a and a second concave portion 23b and a smoke plate 15 provided with a convex portion 17 are arranged to face each other with an air layer 30 interposed therebetween. (Sb) is formed.

  Then, a three-layer structure in which the thin portion 25 of the transparent plate 10 and the thick portion 18 of the smoke plate 15 are opposed to each other with the air layer 30 interposed between the lamp region (Sa) and the lamp region (Sb). , The rear window 1 is configured.

  When the rear window 1 has the above-described configuration, the first LED 3 and the second LED 4 disposed near both ends of the rear window 1 are LEDs having different emission colors, respectively. The lamp area (Sb) can have different lamp functions from each other.

  For example, if the first LED 3 is a red LED that emits red light and the second LED 4 is an amber LED that emits amber light, the lamp area (Sa) located on the first LED (red LED) 3 side has a tail & The lamp area (Sb) located on the side of the second LED (amber LED) 4 has a function of a stop lamp, and has a function of a turn signal lamp.

  As described above, by configuring the rear window 1 according to the fourth embodiment, the rear window 1 can have a plurality of lamp functions.

  At the same time, the lamp region (Sa) and the lamp region (Sb) emit light from each of the first LED 3 and the second LED 4 disposed on each side and are guided through the transparent plate 20 by the window region. (W). For this reason, even if the first LED 3 and the second LED 4 having different emission colors are simultaneously turned on (emit light), the first LED 3 and the second LED 4 from the lamp region (Sa) and the lamp region (Sb) respectively. Light of each light source color without emitting colors of the second LED 4 being mixed is emitted.

  As shown in FIG. 10 (partial cross-sectional view of the window region), the window region (W) is provided with a lightened portion 19 in a portion of the smoke plate 15 corresponding to the thin portion 25 of the transparent plate 20 to form a smoke plate. It is also possible to make the thickness of 15 the same as the lamp area (Sa) and the lamp area (Sb). Similarly, a lightening portion 19 is provided in a portion of the smoke plate 15 corresponding to the thin portion 25 of the transparent plate 20, and as shown in FIG. 11 (partial sectional view of the window region), The lightening portion 19 is provided in a portion corresponding to the thin portion 25 of the transparent plate 20, and the boundary between each of the lamp region (Sa) and the lamp region (Sb) and the window region (W) may be a curved surface shape 19a. it can.

  In each of the first to fourth embodiments described above, the air layer 30 is provided between the transparent plate 20 and the smoke plate 15, but as a fifth embodiment, a smoke plate By forming 15 from a material having a lower refractive index than the transparent plate 20, as shown in FIG. 12 (partial sectional view of the fifth embodiment relating to the window rear lamp), the air layer 30 is removed and the transparent plate 20 and the transparent plate 20 are removed. The smoke plate 15 can be brought into opposing contact (surface contact) 40.

  In this case, each of the side surface 23c of the second concave portion 23b of the transparent plate 20 and the side surface 25a of the thin portion 25, which are in opposing contact with the smoke plate 15, are connected to a perpendicular (not shown) of the back surface 22 of the transparent plate 20. , Is set to be larger than the critical angle with respect to the smoke plate 15.

  Further, when the critical angle is smaller than 45 °, the angle between each of the side surface 23c of the second concave portion 23b of the transparent plate 20 and the side surface 25a of the thin portion 25 and the perpendicular of the back surface 22 of the transparent plate 20 is 45 °. ° is preferably set near.

  Thereby, an optical effect similar to the case where the air layer 30 is interposed between the transparent plate 20 and the smoke plate 15 can be obtained.

  In the above-described first to fifth embodiments, as shown in FIG. 13 (partial cross-sectional view of the window rear lamp), the surface (rear surface) of the smoke plate 15 opposite to the surface facing the transparent plate 20. It is also possible to provide a light shielding member 14a of black or the like at a position corresponding to at least the first concave portion 23a, the second concave portion 23b, and the side surface 25a of the transparent plate 20 of FIG.

  Accordingly, even if light leaked from the first concave portion 23a, the second concave portion 23b, and the side surface 25a of the transparent plate 20 is transmitted through the smoke plate 15, the light is reliably blocked by the light shielding member 14a. The light leaked to the vehicle will not enter the vehicle.

  In all of the above-described embodiments, a lamp area having a lamp function is provided directly on the rear window. However, if this structure is difficult, as shown in FIG. 14 (mounting diagram of the lamp unit), It is also conceivable to manufacture a lamp unit 45 having the same configuration and separately attach the lamp unit 45 to the rear window 46 (particularly, the room 47 side of the rear window 46).

  Thereby, the degree of freedom of the arrangement position of the lamp in the rear window is increased, and the appearance in design can be improved.

  The shape of the concave portion 23 is not limited to the above-mentioned conical shape, and may be, for example, a conical shape having a bottom surface formed of an ellipse, a triangle, a square, a rectangle, or the like.

1. Rear window 2. Light source (LED)
2a: Light emitting surface 3: Light source (first LED)
4. Light source (second LED)
5 ... Substrate 14 ... Back 14a ... Light shielding member 15 ... Smoke plate 15a ... Side 16 ... Front 17 ... Convex 17a ... Side 18 ... Thick 19 ... Lightening 19a ... Curved surface 20 ... Transparent plate 21 ... Light incident surface 22 Back 23 Concave 23a First Concave 23b Second Concave 23c Side 24 Light Emitting Surface 25 Thin Part 25a Side 30 Air Layer 35 V-groove 35a First V-groove 35b Second V-groove
35c side surface 40 opposed contact 45 lamp unit 46 rear window 47 indoor

Claims (5)

A lamp having a lamp function provided in a rear window of a vehicle,
A laminated structure in which a colorless and transparent transparent plate located on the outside of the vehicle and a dark translucent smoke plate located on the inside of the vehicle are opposed to each other with an air layer interposed therebetween;
A light source arranged near the end of the transparent plate so that the emitted light enters the transparent plate,
The transparent plate is provided with a light guiding optical system that emits light emitted from the light source and guided inside the transparent plate to the outside of the vehicle by internal reflection by a plurality of total reflection surfaces provided on the transparent plate. Has been
The total reflection surface is a side surface of a conical concave portion that is dispersed and arranged in a dot shape, or a side surface of a V-shaped groove portion,
The smoke plate includes a convex portion accommodated in the concave portion or the groove portion, at a position corresponding to the concave portion or the groove portion of the transparent plate on a surface on a side facing the transparent plate,
Lighting characterized by the above-mentioned. A lamp having a lamp function provided in a rear window of a vehicle,
A laminated structure in which a colorless and transparent transparent plate located on the outside of the vehicle and a dark translucent smoke plate having a smaller refractive index than the transparent plate located on the inside of the vehicle are in opposing contact,
A light source arranged near the end of the transparent plate so that the emitted light enters the transparent plate,
The transparent plate is provided with a light guiding optical system that emits light emitted from the light source and guided inside the transparent plate to the outside of the vehicle by internal reflection by a plurality of total reflection surfaces provided on the transparent plate. Has been
The total reflection surface is a side surface of a conical concave portion that is dispersed and arranged in a dot shape, or a side surface of a V-shaped groove portion,
The smoke plate includes a convex portion accommodated in the concave portion or the groove portion, at a position corresponding to the concave portion or the groove portion of the transparent plate on a surface on a side facing the transparent plate,
A lighting fixture characterized by being. The lamp having the lamp function is formed in a lamp region provided in a part of the rear window, or is mounted as a lamp unit on the vehicle interior side of the rear window.
The lamp according to claim 1, wherein: A rear window for a vehicle in which a colorless transparent transparent plate located on the outside of the vehicle and a dark translucent smoke plate located on the inside of the vehicle are arranged opposite to each other with an air layer interposed therebetween,
A light source arranged near the end of the transparent plate so that the emitted light enters the transparent plate,
The vehicle rear window,
A light guide in which light emitted from the light source and guided in the transparent plate is emitted to the outside of the vehicle by internal reflection by a plurality of total reflection surfaces provided on the transparent plate at a part of the vehicle rear window. A lamp area having a lamp function comprising an optical system;
And a window area having a rear window function,
The transparent plate, in the window region on the side farther to the light source than the lamp region, has a thin portion thinner than the portion located in the lamp region,
The smoke plate includes a thick portion having substantially the same shape as a thin portion at a position corresponding to the thin portion of the transparent plate on a surface on a side facing the transparent plate . Window rear lamp. A rear window for a vehicle in which a colorless transparent plate located on the outside of the vehicle and a dark translucent smoke plate located on the inside of the vehicle and having a smaller refractive index than the transparent plate are in opposing contact with each other,
A light source arranged near the end of the transparent plate so that the emitted light enters the transparent plate,
The vehicle rear window,
A light guide in which light emitted from the light source and guided in the transparent plate is emitted to the outside of the vehicle by internal reflection by a plurality of total reflection surfaces provided on the transparent plate at a part of the vehicle rear window. A lamp area having a lamp function comprising an optical system;
And a window area having a rear window function,
The transparent plate, in the window region on the side farther to the light source than the lamp region, has a thin portion thinner than the portion located in the lamp region,
The smoke plate is provided with a thick portion having substantially the same shape as the thin portion at a position corresponding to the thin portion of the transparent plate on a surface on a side facing the transparent plate . Window rear lamp.