CN109915783B - Colored image drawing device - Google Patents
Colored image drawing device Download PDFInfo
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- CN109915783B CN109915783B CN201811310700.5A CN201811310700A CN109915783B CN 109915783 B CN109915783 B CN 109915783B CN 201811310700 A CN201811310700 A CN 201811310700A CN 109915783 B CN109915783 B CN 109915783B
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Abstract
The invention provides a drawing device which can clearly and simply draw a multicolor image with a complex shape on an object by using an inexpensive optical component. A vehicle drawing device (11) is provided with three lamp units (51, 52, 53) inside a lamp housing (12). Each lamp unit (51, 52, 53) includes a light source (27) that generates visible light, a condenser lens (28) that condenses light from the light source (27), a light-shielding window (38) that forms light emitted from the condenser lens (28) into an image of a desired shape, and a projection lens (48) that projects the formed image toward the front of the lamp. Colored light is generated by at least one of the light source (27), the condenser lens (28), and the projection lens (48). At least two lamp units superimpose images colored in different colors, respectively, at the same position in front of the lamps, thereby drawing a colored image on the road surface.
Description
Technical Field
The present invention relates to an apparatus for drawing a colored image on an object such as a road surface or a wall surface by superimposing the colored image on the object using a plurality of lamp units.
Background
Conventionally, a vehicle lamp is known which forms a light distribution pattern by combining a plurality of colored lights. For example, patent document 1 describes a vehicle lamp in which a plurality of spotlights are arranged inside a lamp housing, and a plurality of meters are individually caused to emit light by circular colored diffused light emitted from the respective spotlights. Patent document 2 describes a device in which MEMS mirrors are provided in drawing units built in left and right headlamps, respectively, and each mirror draws a colored image in a complementary color relationship on a road surface by superimposing each colored light distribution pattern in front of a vehicle.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2000-188002
Patent document 2: japanese patent laid-open publication No. 2017-107690
Disclosure of Invention
Problems to be solved by the invention
However, according to the conventional device of patent document 1, not only the light distribution pattern is limited to a circular shape, but also the object is caused to emit light by a plurality of colored diffused lights, and therefore the outline of the colored image becomes unclear, and it is not suitable for drawing an image having a complicated shape such as characters and figures. In addition, according to the conventional device of patent document 2, although a colored image of a complicated shape can be drawn using the MEMS mirror, there is a problem that expensive optical components are required and control for drawing is complicated.
Accordingly, an object of the present invention is to provide a device capable of clearly and easily drawing a colored image having a complicated shape on an object using an inexpensive optical member.
Means for solving the problems
In order to solve the above-described problems, a drawing device according to the present invention includes at least two lamp units, each of the lamp units including a light source for generating visible light, a first lens for converging light from the light source, a shade (shade) for forming light emitted from the first lens into an image having a desired shape, and a second lens (projection lens) for projecting the formed image to the front of a lamp, wherein colored light is generated by at least one of the light source, the first lens, and the second lens, and at least two of the lamp units superimpose images colored in different colors on substantially the same position in front of the lamp, thereby drawing a colored image on an object.
In a preferred embodiment of the present invention, in order to accurately superimpose a plurality of colored images at the same position in front of the lamp, the first lens, the light shielding window, and the second lens are arranged at the same position on the optical axis of each of the at least two lamp units. In this case, at least two lamp units may be arranged in an orientation in which the optical axes are parallel to each other, and an appropriate diffusion angle may be set in each second lens so that the plurality of color images coincide at a desired distance. Alternatively, a plurality of lamp units may be arranged in an inclined orientation so that the optical axes intersect in front of the lamps. The optical axis of the lamp unit is a straight line that coincides with the rotational symmetry axis of all light fluxes passing through the optical system of the unit, and for example, a straight line that passes through the center of the light emitting surface of the LED light source and coincides with a perpendicular line to the light emitting surface.
The at least two lamp units may be built-in one lamp housing common to the units or in the respective lamp housing. In particular, in the former case, the components of each unit are integrated by a common member, and the number of optical components can be reduced, thereby reducing the assembly error of the drawing device.
As the common member, for example, a light source substrate, a first lens base, a light shielding plate, and a second lens base, which are common to the respective lamp units, may be built in the lamp housing. Further, a semiconductor light source generating colored light of different colors may be mounted on the light source substrate, the first lens may be integrally formed on the first lens base, the light shielding window may be provided on the light shielding plate, and the second lens may be integrally formed on the second lens base.
In this case, it is preferable that the first lens base is provided with a limiting wall for limiting color mixture of the colored light transmitted through the adjacent first lens. In addition, if a light shielding plate having a large plate thickness is used, the edge portion of the image projected from the second lens tends to be unclear. Therefore, it is preferable to use a sheet made of a transparent resin as a light shielding plate and cover the surface of the sheet other than the light shielding window with an opaque film.
Effects of the invention
According to the drawing device of the present invention, since at least two lamp units are configured to overlap images of different colors formed by the light shielding window at the same position in front of the lamp, an excellent effect is achieved in which a colored image of a complicated shape can be clearly and easily drawn on an object using an inexpensive optical member.
Drawings
Fig. 1 is a side view of a forklift equipped with a drawing device of the present invention.
Fig. 2 is a perspective view showing an embodiment of a drawing apparatus of the present invention.
Fig. 3 is a perspective view showing the drawing device of fig. 2 in an exploded manner.
Fig. 4 is an enlarged perspective view of the light source, the condenser lens, and the light shielding window of fig. 3.
Fig. 5 is a horizontal cross-sectional view of the depiction apparatus of fig. 2.
Fig. 6 is a vertical sectional view of the drawing device along the line X-X of fig. 5.
Fig. 7 is a process diagram showing a method of manufacturing a light shielding window.
Fig. 8 is a plan view showing the operation of the drawing device.
Fig. 9 is a perspective view showing an example of a colored image based on colored light different from that in fig. 8.
Fig. 10 is a perspective view showing another example of a colored image.
Fig. 11 is a perspective view showing still another embodiment of a colored image.
Fig. 12 is a plan view showing another embodiment of the drawing device of the present invention.
Description of the reference numerals
1: a forklift; 11: a rendering device; 12: a lamp housing; 21: a light source substrate; 22: a first lens base; 23: a visor; 24: a second lens base; 27: an LED light source; 28: a condenser lens as a first lens; 29: a restricting wall; 38: a light-shielding window; 39: an opaque film; 48: a projection lens as a second lens; 51: a lamp unit; 52: a lamp unit; 53: a lamp unit; 61: a rendering device; g: coloring the image; r: a road surface.
Detailed Description
Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The drawing device 11 shown in fig. 1 includes a lamp housing 12 in which a plurality of lamp units (not shown) are built, and a bracket 13 for attaching the lamp housing 12 to a vehicle body (for example, a roof frame) 2 of the forklift 1, and the drawing device 11 draws a colored image G for notifying the approach of the forklift 1 on a road surface R ahead in the traveling direction. The drawing device 11 is not limited to the lighting device used for the forklift 1, and may be used for various lighting devices such as lighting devices for vehicles such as civil engineering construction vehicles, buses, passenger vehicles, and railway vehicles, lighting devices for aircrafts and ships, street lamps, and advertising lamps.
As shown in fig. 2 and 3, the lamp housing 12 is formed in a box shape from a light metal material such as aluminum, and a bracket 13 is assembled to the elongated grooves 14 on both left and right side surfaces thereof by screws 15 so as to be adjustable in angle. Frame members 16, 17 are attached to both front and rear ends of the lamp housing 12, and a pair of front and rear sealing members 18, 19, a heat sink 20, a light source substrate 21, a first lens base 22, a light shielding plate 23, and a second lens base 24 are incorporated in the lamp housing 12. Then, the power supply cable 25 is pulled out from the light source substrate 21 to the lamp rear side via the rear side frame member 16, and the lens portion of the second lens base 24 is exposed from the front side frame member 17 to the lamp front side.
As shown in fig. 3 and 4, three LED light sources 27 generating colored visible light are mounted side by side on the light source substrate 21 along the left and right. Three condenser lenses 28 (a part of which is shown in fig. 4, and see fig. 5 in detail) arranged in the left and right direction as first lenses for condensing light from the LED light sources 27 are integrally formed on the rear surface of the first lens base 22, and a pair of left and right regulating walls 29 for regulating interference between light emitted from the adjacent condenser lenses 28 are formed on the front surface of the first lens base 22 in a protruding manner. The restricting wall 29 is provided with a boss portion 30 and a small projection 31, and the boss portion 30 is formed with a through hole 33 through which an assembly bolt 32 is inserted. As means for restricting mutual interference of light, the restricting wall 29 may be formed by providing a surface-treated layer formed by coating, vapor deposition, or the like on the surface of the restricting wall 29, by providing light control means such as embossing or a diffusion step, or by multicolor molding of a transparent resin material and an opaque resin material.
The light shielding plate 23 is formed of a thin plate made of transparent resin having an end face in the shape of コ, and is formed with small holes 36 into which the small protrusions 31 of the regulating wall 29 are fitted, insertion holes 37 through which the assembly bolts 32 are inserted, and three light shielding windows 38 for forming light emitted from the condenser lens 28 into an image of a desired shape. Each of the light shielding windows 38 is a light transmitting portion opened by cutting three positions located in front of the condenser lens 28 into a desired shape, and the surface (front surface and/or rear surface) of the light shielding plate 23 other than the light transmitting portions is covered with an opaque film 39. The light shielding window 38 shown in fig. 4 is cut out in an arrow shape that informs the traveling direction of the forklift 1.
Further, the light shielding window 38 may be formed on the light shielding plate 23 by a method other than the cutting. For example, as shown in fig. 7, a substrate (a thin plate made of a transparent resin) of the light shielding plate 23 is prepared, a mask for forming a pattern or a character is formed on the surface of the substrate, an opaque film 39 is coated on the surface of the substrate by vapor deposition, and then the mask is removed to form the light shielding window 38. Alternatively, the opaque film 39 is formed over the entire surface of the base material by vapor deposition or plating, and the opaque film 39 is partially peeled off by laser processing or the like to form the light shielding window 38. The light shielding window 38 formed by the above method is not an opening portion but a light transmitting portion of the base material itself, and the surface of the thin plate except the light transmitting portion is covered with the opaque film 39.
As shown in fig. 4 and 5, the assembly bolts 32 are fastened to the bolt holes 43 of the rear frame member 16 through the insertion holes 37 of the light shielding plate 23, the through holes 33 of the first lens base 22, the holes 41 of the light source substrate 21, and the holes 42 (see fig. 3) of the heat sink 20, and the rear frame member 16 is assembled to the rear end corner portion of the lamp housing 12 through the rear seal 18 by screws 44 (see fig. 3). Thereby, the heat sink 20, the light source substrate 21, the first lens base 22, and the light shielding plate 23 are fixedly held to the lamp housing 12 via the rear bezel member 16 and the rear seal 18.
On the other hand, as shown in fig. 5 and 6, the second lens base 24 is sandwiched between the front bezel member 17 and the lamp housing 12 via the front seal 19 at the peripheral edge portion, and the front bezel member 17 is assembled to the front corner portion of the lamp housing 12 by screws 45 (see fig. 3). Three projection lenses 48 as second lenses for projecting the three images formed by the light shielding window 38 toward the front of the lamp are integrally formed on the second lens base 24 at the portion exposed from the front side frame member 17. Each projection lens 48 is a convex lens whose front surface side is convex, and an appropriate diffusion angle (θ) is set in each projection lens 48 so that three images are formed at positions separated by the same distance toward the front of the lamp.
As shown in fig. 5, three lamp units 51, 52, and 53 are formed by the three LED light sources 27, the condenser lens 28, the light shielding window 38, and the projection lens 48, respectively. The lamp units 51 to 53 are housed inside the lamp housing 12 in a side-by-side manner along the left and right (up and down in fig. 5) with their respective optical axes 51A, 52A, and 53A parallel to each other, and are configured to draw a colored image G on the road surface R by superimposing three images projected from the projection lens 48 at the same position in front of the lamp (see fig. 8).
Here, the light source substrate 21 is an optical member common to the lamp units 51 to 53, and three LED light sources 27 are mounted on the optical member. Similarly, the first lens base 22, the light shielding plate 23, and the second lens base 24 are also common optical components, and three condenser lenses 28 are integrally formed on the first lens base 22, three light shielding windows 38 are provided through the light shielding plate 23, and three projection lenses 48 are integrally formed on the second lens base 24. The LED light source 27, the condenser lens 28, the light shielding window 38, and the projection lens 48 are disposed at the same positions on the three optical axes 51A, 52A, and 53A by the common optical members 21, 22, 23, and 24.
As shown in fig. 8, in the drawing device 11 of the present embodiment, LEDs for generating colored light of different colors are used for the three light sources 27, and the three lamp units 51, 52, 53 draw a colored image G indicated by an arrow on the road surface R by superimposing the colored light of, for example, blue, white, and green at the same position in front of the lamps. However, colored light may be generated by coloring the condenser lens 28 and/or the projection lens 48, not depending on the emission color of the LED light source 27. In addition, the colored image G may be drawn by making at least two of the three LED light sources 27, the condenser lens 28, or the projection lens 48 different in emission color.
For example, in the embodiment shown in fig. 9, an orange colored image G is drawn on the road surface R by overlapping the color light from two red LED light sources 27R and one yellow LED light source 27Y. In the embodiment shown in fig. 10, white light from one white LED light source 27W is formed through the first light-shielding window 38W, and blue light from two blue LED light sources 27B is formed through the second light-shielding window 38B, whereby two kinds of colored images G different in color and shape are drawn on the road surface R in a superimposed manner. In the embodiment shown in fig. 11, white light and blue light are formed by the hollow light-shielding windows 38W and 38B having different shapes, and a colored image G having a more complicated shape can be drawn on the road surface R.
Therefore, according to the drawing device 11 of the present embodiment, as shown in fig. 1, 8 to 11, by superimposing the images projected by the three lamp units 51, 52, 53 at the same position in front of the lamps, it is possible to clearly and easily draw a colored image G of an arbitrary shape on the road surface R in front of the forklift 1 in the traveling direction. In particular, as shown in fig. 8, for example, by making the emission colors of the LED light sources 27 of the lamp units 51 to 53 different from each other for blue, white, and green, even if it is difficult to see a green image in a loading/unloading area where the road surface R is painted green, it is possible to clearly draw a colored image G formed of the remaining two colors of blue and white on the green road surface R.
Further, since the lamp units 51 to 53 do not include a movable mirror such as an MEMS mirror, a colored image G having a complicated shape can be easily drawn with a low-cost configuration without requiring any special control. Further, since the LED light source 27, the condenser lens 28, the light shielding window 38, and the projection lens 48 are integrated by the optical members 21, 22, 23, and 24 shared by the three lamp units 51 to 53, the number of components can be reduced, the assembly error can be minimized, and the three images can be superimposed at desired positions with high accuracy. In particular, since the light shielding window 38 is formed on the light shielding plate 23 formed of a thin plate made of a transparent resin, there are advantages in that an image having a complicated shape can be generated with high accuracy and the edge portion thereof can be drawn with high sharpness as compared with the case of cutting a metal plate.
The present invention is not limited to the above-described embodiments, and may be implemented by appropriately changing the shape and configuration of each part within a range not departing from the gist of the present invention. For example, although the drawing device 11 of the above embodiment has the plurality of lamp units 51 to 53 built in the single lamp housing 12 common to the respective units, a plurality of lamp units may be built in the respective lamp housings as shown in fig. 12.
In the drawing device 61 shown in fig. 12, three lamp housings 62, 63, 64 are provided in the vehicle body 2 such as a forklift, and three lamp units 65, 66, 67 are respectively built in the lamp housings 62 to 64. The lamp units 65 to 67 of the first lamp housing 62 simultaneously generate blue colored light, the lamp units 65 to 67 of the second lamp housing 63 simultaneously generate white colored light, and the lamp units 65 to 67 of the third lamp housing 64 simultaneously generate green colored light, and the colored lights of these three colors are superimposed at the same position in front of the lamps, thereby drawing a colored image G on the road surface R.
Claims (6)
1. A painted image drawing device is characterized in that,
the drawing device includes at least two lamp units, each of the lamp units including a light source for generating visible light, a first lens for converging light from the light source, a light-shielding window for forming light emitted from the first lens into an image of a desired shape, a second lens for projecting the formed image to the front of the lamp unit, and a limiting wall for limiting a mixed color of the colored light transmitted through the adjacent first lenses, the at least two lamp units drawing a colored image on an object by superimposing the images colored in different colors on each other and forming the images at substantially the same position in front of the lamp units,
the at least two lamp units are built in a lamp housing common to the lamp units,
a light source substrate, a first lens base, a light shielding plate, and a second lens base, which are common to the respective lamp units, are built in the lamp housing, the light source is mounted on the light source substrate, the first lens is integrally formed on the first lens base, the light shielding window is provided on the light shielding plate, and the second lens is integrally formed on the second lens base,
the restriction wall is provided on the first lens base.
2. A painted image depicting apparatus according to claim 1,
in the at least two lamp units, the first lens, the light shielding window, and the second lens are disposed at the same position on the optical axis of each lamp unit.
3. A painted image depicting apparatus according to claim 1,
the light shielding plate is provided with a thin plate made of transparent resin, and the surface of the thin plate except the light shielding window is covered by an opaque film.
4. A painted image depicting apparatus according to claim 1,
the at least two lamp units are built into respective lamp housings.
5. A painted image depicting apparatus according to claim 1,
the light shielding plate is provided with a hole part for the protrusion to be embedded in, and the boss part is provided with a through hole for the assembly bolt to penetrate through.
6. A painted image depicting apparatus according to claim 1,
a moderate diffusion angle is set in the second lens so that the images colored in different colors are imaged at positions separated by the same distance to the front of the lamp unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-217231 | 2017-11-10 | ||
| JP2017217231A JP2019085076A (en) | 2017-11-10 | 2017-11-10 | Colored image drawing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109915783A CN109915783A (en) | 2019-06-21 |
| CN109915783B true CN109915783B (en) | 2022-03-22 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821815505.3U Active CN209325653U (en) | 2017-11-10 | 2018-11-06 | Rendered image drawing apparatus |
| CN201811310700.5A Active CN109915783B (en) | 2017-11-10 | 2018-11-06 | Colored image drawing device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821815505.3U Active CN209325653U (en) | 2017-11-10 | 2018-11-06 | Rendered image drawing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2019085076A (en) |
| CN (2) | CN209325653U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019085076A (en) * | 2017-11-10 | 2019-06-06 | 株式会社小糸製作所 | Colored image drawing device |
| US11807158B2 (en) | 2019-11-25 | 2023-11-07 | Koito Manufacturing Co., Ltd. | Vehicle lighting device |
| WO2022102774A1 (en) * | 2020-11-16 | 2022-05-19 | 株式会社小糸製作所 | Road surface rendering device |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5931566A (en) * | 1995-10-12 | 1999-08-03 | Valeo Sylvania L.L.C. | Colored and decorative lighting |
| JP2005259653A (en) * | 2004-03-15 | 2005-09-22 | Harison Toshiba Lighting Corp | Lighting system |
| JP2006039338A (en) * | 2004-07-29 | 2006-02-09 | Sanyo Electric Co Ltd | Lighting system and projection type video display device |
| JP2006301363A (en) * | 2005-04-21 | 2006-11-02 | Harison Toshiba Lighting Corp | Illuminating apparatus |
| JP2007299679A (en) * | 2006-05-01 | 2007-11-15 | Kokubu Denki Co Ltd | Lighting apparatus |
| JP5592183B2 (en) * | 2010-07-16 | 2014-09-17 | 株式会社小糸製作所 | Vehicle lighting |
| JP5810313B2 (en) * | 2011-10-19 | 2015-11-11 | パナソニックＩｐマネジメント株式会社 | LED module and lighting apparatus using the same |
| JP2014123479A (en) * | 2012-12-21 | 2014-07-03 | Hitachi Appliances Inc | Lighting device, and light condensation unit used for the same |
| AT514967B1 (en) * | 2013-10-25 | 2015-08-15 | Zizala Lichtsysteme Gmbh | Microprojection light module for a motor vehicle headlight |
| CN203848148U (en) * | 2014-03-03 | 2014-09-24 | 尤国锋 | Automobile headlamp |
| JP2017030428A (en) * | 2015-07-30 | 2017-02-09 | 日本電産コパル株式会社 | Vehicle projector and vehicle |
| JP6352892B2 (en) * | 2015-12-08 | 2018-07-04 | トヨタ自動車株式会社 | Vehicle headlamp structure and vehicle headlamp control method |
| DE102016112617B3 (en) * | 2016-07-08 | 2017-10-26 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlight with a small overall depth |
| JP2019085076A (en) * | 2017-11-10 | 2019-06-06 | 株式会社小糸製作所 | Colored image drawing device |
-
2017
- 2017-11-10 JP JP2017217231A patent/JP2019085076A/en active Pending
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2018
- 2018-11-06 CN CN201821815505.3U patent/CN209325653U/en active Active
- 2018-11-06 CN CN201811310700.5A patent/CN109915783B/en active Active
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| CN209325653U (en) | 2019-08-30 |
| JP2019085076A (en) | 2019-06-06 |
| CN109915783A (en) | 2019-06-21 |
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