JP3620007B2 - Manufacturing method of display light path direction regulating member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is formed on an optical path regulating surface disposed on an optical path of image light of a display image from a display surface illuminated by illumination light such as direct or indirect illumination or transmitted illumination from the back. The present invention relates to a method for manufacturing a display light path direction regulating member that regulates the direction of an optical path of light.
[0002]
[Prior art]
As an example of a display form in which a display surface is illuminated by direct or indirect illumination or illumination light such as transmitted illumination from the back, and the image light from the illuminated display surface is visually recognized, a combination of vehicles There is a meter.
[0003]
In general, a combination meter of a vehicle is provided with a meter such as a speedometer and an engine tachometer, a gauge such as a gasoline fuel gauge and a radiator water temperature gauge, and a dial plate and a pointer constituting them are illuminated, The image light of the meter or gauge generated by the illumination is visually recognized by the driver.
The vehicle combination meter is provided with a shift position lamp, various warning lamps, etc. When these lamps are lit, image light such as a design mark corresponding to the lamp is generated, and this image light is operated. Visually recognized by a person.
[0004]
By the way, the various types of image light generated by these vehicle combination meters are generally diffuse light, so they are not all directed toward the driver side. In this case, images such as dials, pointers, marks of shift position lamps and various warning lamps may be reflected on the windshield, obstructing the field of view in front of the windshield and hindering driving.
[0005]
In this way, the image light of the display image from the display surface illuminated by illumination light such as direct or indirect illumination or transmitted light from the back is directed toward the viewer side who should visually recognize the display image. However, if the image light is directed in the other direction, the image light is reflected on the member on the extension line, and in addition to the display image that should be visually recognized, the original display image is obstructed. In order to prevent an unnecessary display image from being formed, conventionally, a light transmitting portion and a light shielding portion are provided on a target surface through which image light of the illuminated display image is transmitted or reflected. A louver is formed, and a part of the image light of the display image is blocked by a light shielding portion so as to restrict the optical path of the image light from being directed in an inconvenient direction.
[0006]
As a conventional specific configuration of the louver, a plurality of light-shielding sheets and transparent sheets are alternately laminated and sliced on a surface orthogonal to the sheet, and a film-like material adhered to a target surface, or light-shielded on a target surface. Apply the color photosensitive resin evenly, mask the unnecessary part of the photosensitive resin with photoresist, and remove the unnecessary photosensitive resin part from the structure by light irradiation to form the light shielding part. In some cases, a light shielding portion is formed on the target surface by an etching method in the same process.
[0007]
[Problems to be solved by the invention]
However, the film to be attached to the target surface described above has a problem in that the film itself is troublesome to be created, and then the troublesome process of attaching the prepared film to the target surface has to be performed.
In addition, the louver using the photosensitive resin or using the etching method is superior in terms of the number of steps and labor than the measure using the original film, but in terms of cost, it is far more than the film. There was a problem that it was expensive.
[0008]
Such troubles are caused by lighting switches around the driver's seats, monitor screens in car navigation systems and in-vehicle TV receivers that have become widespread in recent years, and fare calculation meters mounted on taxis and driving agency accompanying vehicles. When solving the problem that the image light of the display image of parts and devices with a display surface illuminated by the vehicle, such as the display surface of the vehicle, is reflected on the windshield, obstructing the field of view in front of the windshield and hindering driving It occurred in the same way.
[0009]
In addition, the above-described problem causes the viewer to visually recognize not only the vehicle driver's seat but also the image light from the display surface illuminated by direct or indirect illumination or illumination light such as transmitted illumination from the back. At this time, if there is a member in the vicinity where the image light is reflected and a display image different from the original display image is visible, the display image reflected on the member is the original display image. This also occurs when taking measures to prevent unnecessary image light from reaching such peripheral members.
[0010]
The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a display light optical path direction regulating member capable of regulating the direction of image light from the display surface to an arbitrary direction at a low cost by a simple process. An object of the present invention is to provide a method of manufacturing a display light path direction regulating member capable of performing
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the manufacturing method of the display light path direction regulating member according to the first aspect of the present invention is formed on the optical path regulating surface arranged on the optical path of the image light of the display image from the illuminated display surface. A light-shielding portion for blocking a part of the image light from the display surface toward the viewing region side for visually recognizing the display surface from the optical path regulating surface via the optical path regulating surface is arranged in a predetermined pattern, A method of manufacturing a display optical path direction regulating member that regulates formation of an unnecessary optical path of the image light from an optical path regulating surface to an unnecessary area other than the visual recognition area, the optical path regulating surface corresponding to the light shielding portion Optical path regulating surface Screen printing performed by applying a screen plate to the formation surface of the display light path direction regulating member, or the surface of the drum on which the printing plate of the display light path direction regulation member is formed contacts the formation surface By offset printing, the ink is cured by at least one of physical change and chemical change. An optical material is printed in the predetermined pattern, and the light shielding material printed on the optical path regulating surface portion is cured by at least one of a physical change and a chemical change and fixed on the optical path regulating surface portion. The light shielding material is stacked on the optical path regulating surface portion by overlapping printing with the predetermined pattern a plurality of times. It is characterized by doing so.
[0014]
Claim 2 The method of manufacturing a display light path direction regulating member according to the present invention described in 1 uses ultraviolet curable ink as the light shielding material, and the ultraviolet curable ink printed with the predetermined pattern on the optical path regulating surface portion is irradiated with ultraviolet light. It was made to harden.
Furthermore, claim 3 The method for manufacturing a display light path direction regulating member according to the present invention described in 1 uses a thermosetting resin ink as the light shielding material, and heats the thermosetting resin ink printed in the predetermined pattern on the optical path regulating surface portion. It was made to harden by.
[0016]
According to the manufacturing method of the display light path direction regulating member according to the first aspect of the present invention, the light shielding portion of the display light path direction regulating member arranged in a predetermined pattern is displayed on the display image from the illuminated display surface. Since the light shielding material is directly printed on the optical path regulating surface arranged on the optical path of the image light, the light shielding material is printed on the optical path regulating surface by using a printing plate. Therefore, it is possible to manufacture the display light path direction regulating member at a low cost by a method that does not require printing.
[0017]
Moreover, according to the manufacturing method of the display light path direction regulating member of the present invention described in claim 1, when the light path regulating surface is on both sides of the member through which the image light is transmitted, the light shielding material is printed on both sides simultaneously. It is also possible to manufacture the display light path direction regulating member, and the direction of the optical path of the image light as a whole is changed by making the directions of the optical paths of the image light blocked by the display light path direction regulating members on the respective surfaces different from each other. It becomes possible to set complicatedly or finely.
[0018]
In addition, according to the manufacturing method of the display light path direction regulating member of the present invention described in claim 1, since the light shielding portion of the display light path direction regulating member is formed by printing, the printing height of the light shielding material is adjusted. Therefore, the restriction direction of the optical path of the image light can be set complicatedly or finely.
[0019]
Also, Claim 1 According to the manufacturing method of the display light path direction regulating member of the present invention described in the above, the screen plate is applied to the object to be printed, the ink is imprinted with the squeegee from the screen plate, and the ink that has passed through the printing pattern of the screen plate is used. By printing the light shielding material on the optical path regulating surface part by screen printing method to transfer to the printing target, not only the equipment cost for manufacturing the display optical path direction regulating member for the optical path regulating surface is kept low, but also the printing plate itself The cost can be kept low.
[0020]
further, Claim 1 According to the manufacturing method of the display optical path direction regulating member of the present invention described in the above, the light shielding material is applied to the optical path regulating surface by the offset printing method in which the ink is transferred from the rotary roll to the drum formed on the surface and transferred to the printing target. By printing on the part, it is possible to keep down the equipment cost for manufacturing the display optical path direction regulating member with respect to the optical path regulating surface. It is possible to achieve high-speed manufacturing and increase efficiency by mass production.
[0021]
Also, Claim 1 According to the manufacturing method of the display light path direction regulating member of the present invention described in the above, it is usually performed by curing the light shielding material printed on the light path regulating surface by at least one of physical change and chemical change. It becomes possible to fix the light shielding material to the optical path regulating surface in a shorter time than drying.
[0022]
further, Claims 1 to 3 According to the manufacturing method of the display light path direction regulating member of the present invention described in each of the above, the light shielding material is cured and fixed to the light path regulating surface thereby without contact with the light shielding material or the light path regulating surface. This makes it possible to prevent the light shielding material from peeling off from the optical path regulating surface when the light shielding material is cured, and to fix the light shielding material reliably.
[0023]
Also, Claim 1 According to the manufacturing method of the display light path direction regulating member of the present invention described in 1 above, the printing height of the light shielding material is set to 1 by laminating the light shielding material on the optical path regulating surface in a predetermined pattern by overprinting a plurality of times. Not only can the adjustment be made according to the height of the light-shielding material, but also the fine adjustment can be made by selecting the number of times the light-shielding material is printed.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a method for producing a display light path direction regulating member of the present invention will be described with reference to the drawings.
[0025]
FIG. 1 is a front view of a vehicle combination meter that can form a display light path direction regulating member by employing the manufacturing method according to the present invention.
[0026]
And the combination meter of this embodiment shown by the reference number 1 in FIG. 1 is arrange | positioned at the dashboard (not shown) of a vehicle, The speedometer 3 and the engine tachometer 5 which were arrange | positioned side by side, A fuel gauge 7 and a radiator water temperature meter 9 disposed on both sides of the speedometer 3 and the engine tachometer 5, a shift position lamp 11 disposed between the speedometer 3 and the engine tachometer 5, and the speedometer 3 And a warning lamp 13 disposed below the engine tachometer 5.
[0027]
The speedometer 3, engine tachometer 5, fuel gauge 7, and radiator water temperature gauge 9 are all made up of a dial 15, as shown in FIG. A pointer 19 for indicating a position corresponding to the traveling speed of the vehicle in a display unit 17 (see FIG. 1) formed of scales and numbers formed on the surface of the dial 15 and a pointer 19 disposed on the back surface of the dial 15. And a light guide plate 25 disposed on the back surface of the dial plate 15, and in proximity to the light guide plate 25. A light source 27 disposed on the back side of the dial 15.
[0028]
The speedometer 3, the engine tachometer 5, the fuel gauge 7, and the radiator water temperature gauge 9 formed in this way are transmitted through the display unit 17 of the dial 15 by light guided from the light source 27 through the light guide plate 25. The indicator 21 of the pointer 19 is configured to shine by the light that is illuminated and guided from the light source 27 through the light guide plate 25.
The peripheral edge of the dial plate 15 is covered with a dial plate 29, and the dial plate 29 prevents light from the light source 27 from leaking from the peripheral edge of the dial plate 15 to the surface side.
[0029]
The shift position lamp 11 and the warning lamp 13 include a light source 33, a lamp housing 35 in which the light source 33 is accommodated and the light emitting side of the light source 33 is opened, and a lens attached to an opening 37 of the lamp housing 35. 39.
[0030]
The lens 39 includes “1”, “2”, “D”, “N”, “R”, “P” marks (not shown) indicating a shift position, “high beam” indicating a warning state, Marks (not shown) are printed one by one with “side brake”, “engine oil”, “seat belt” and “battery”, and the lens 39 has a display color of the printed mark. Depending on the color, it is colored with a light-transmitting intensity.
The opening 37 of the lamp housing 35 to which the lens 39 is attached penetrates the dial plate 15 from the back side to the front side so that the lens 39 just fits into the opening 31 formed in the facing plate 29. It is attached to the dial 15 above.
[0031]
In the shift position lamp 11 formed in this way, when the light source 33 is turned on according to the current shift position, the light from the light source 33 is transmitted through the lens 39 of the opening 37 of the lamp housing 35, and the opening of the facing plate 29. The colored image light of the mark indicating the current shift position that has passed through the lens 39 is emitted to the front of the facing plate 29 through 31.
[0032]
Similarly to the shift position lamp 11, the warning lamp 13, when a warning state occurs, lights the corresponding light source 33 so that the light from the light source 33 passes through the lens 39 of the opening 37 of the lamp housing 35 and opens the opening 31. The colored image light of the mark indicating the currently generated warning state that has passed through the lens 39 is emitted in front of the facing plate 29.
[0033]
The speed meter 3, engine tachometer 5, fuel meter 7, radiator water temperature meter 9, shift position lamp 11, and components on the back side of the dial 15 of the warning lamp 13 are in front of the combination meter 1. The facing plate 29 is attached to the front surface of the housing 41, and the front cover 43 made of a transparent resin is attached to the front surface of the facing plate 29.
Accordingly, the driver (not shown) passes through the front cover 43 of the speedometer 3, the engine tachometer 5, the fuel gauge 7, and the transparent dial 15 of the radiator water temperature gauge 9 and the pointer 19 that shines by itself. The image light and the image light of the mark transmitted through the lens 39 of the shift position lamp 11 and the warning lamp 13 are visually recognized.
[0034]
For this reason, various image lights generated by the speedometer 3, the engine tachometer 5, the fuel gauge 7, the radiator water temperature gauge 9, the shift position lamp 11, and the warning lamp 13 described above are transmitted to the windshield of the vehicle (not shown). ), The front and back surfaces of the dial 15, the front and back surfaces of the indicating portion 21 of the pointer 19, which are located on the optical path of the image light that goes outward of the combination meter 1, It is conceivable to form louvers that regulate the direction of the optical path of the image light on the front and back surfaces of the lens 39 and the front and back surfaces of the front cover 43.
[0035]
In the present embodiment, the front and back surfaces of the dial plate 15, the front and back surfaces of the indicating portion 21 of the pointer 19, the front and back surfaces of the lens 39, and the front and back surfaces of the front cover 43 all correspond to the optical path regulating surfaces in the claims. Of these, the surface of the dial plate 15, the surface of the pointing portion 21 of the pointer 19, and the surface of the lens 39 all correspond to the display surface in the claims, and a louver is placed on the surface corresponding to this display surface. When provided, the optical path regulating surface and the display surface in the claims are the same surface.
[0036]
Therefore, in the following, a method for providing louvers on the front and back surfaces of the dial plate 15, the front and back surfaces of the indicating portion 21 of the pointer 19, the front and back surfaces of the lens 39, and the front and back surfaces of the front cover 43 by the method of the present invention will be described below. The embodiment will be described with reference to the process diagrams of FIGS.
However, here, the dial plate 15, the pointing portion 21 of the pointer 19, the lens 39, and the front cover 43 are collectively referred to as a work 50, and a louver forming surface 50 a, which is one surface thereof, is claimed. The surface is equivalent to the inner optical path regulating surface.
[0037]
FIG. 3 to FIG. 7 are explanatory views showing steps in the case of forming a louver by a screen printing method.
[0038]
When the louver is formed by the screen printing method, first, as shown in FIG. 3, the work 50 to be printed is placed and fixed on the slide stage 51 with the louver forming surface 50a facing upward. In this state, as shown in FIG. 4, a screen plate 53 made of, for example, steel mesh on which a louver printing plate is formed is lowered from above and applied to the formation surface 50a of the workpiece 50, and on the screen plate 53, An ultraviolet curable ink 55 (corresponding to a light shielding material) colored in black or the like that cannot transmit light is placed, and the ultraviolet curable ink 55 is imprinted on the screen plate 53 with a squeegee 57 as shown in FIG. The ultraviolet curable ink 55 corresponding to the pattern of the louver that has passed through is transferred to the formation surface 50 a of the workpiece 50.
[0039]
Next, as shown in FIG. 6, the screen plate 53 is raised and separated from the formation surface 50a of the work 50, and the slide stage 51 is placed with the work 50 placed and fixed as shown in FIG. Then, it is moved horizontally from a position directly below the screen plate 53 by a drive source (not shown) such as a servo motor that can maintain high positional accuracy, and is positioned directly below the ultraviolet lamp 59.
Then, the ultraviolet light from the ultraviolet lamp 59 is uniformly irradiated onto the formation surface 50a of the work 50, and the ultraviolet curable ink 55 corresponding to the pattern of the louver on the formation surface 50a of the work 50 previously transferred is cured, Fix to work 50.
[0040]
FIG. 8 to FIG. 12 are explanatory diagrams showing steps in the case of forming a louver by the offset printing method.
[0041]
When forming the louver by the offset printing method, first, as shown in FIG. 8, the work 50 to be printed is placed on the conveyor 71 with the louver forming surface 50a facing upward, and the work 50 is A surface 73a on which a louver printing plate is formed of a drum 73 arranged in a direction where the rotation axis is orthogonal to the traveling direction above the 71 conveyors located in front of the traveling direction, and a conveyor The distance between the vertical height and 71 is adjusted in accordance with the placement height of the workpiece 50.
[0042]
Then, as shown in FIG. 9, ultraviolet curable ink 55 is imprinted on the surface 73 a of the drum 73 by the transfer roll 75 that contacts the surface 73 a of the drum 73 and rotates in the opposite direction, and the work 50 is drummed by the conveyor 71. As shown in FIG. 10, when the work 50 passes under the drum 73 while the forming surface 50a is in contact with the surface 73a, the surface of the drum 73 is rotated. The ultraviolet curable ink 55 having a louver pattern corresponding to the plate 73a is transferred from the surface 73a of the drum 73 to the formation surface 50a of the workpiece 50.
[0043]
After that, when passing under the drum 73, as shown in FIG. 11, the conveyor 71 is stopped and on the conveyor 71, or as shown in FIG. The louver pattern on the formation surface 50a of the workpiece 50 transferred from the drum 73 by uniformly irradiating the formation surface 50a of the workpiece 50 with ultraviolet light from the upper ultraviolet lamp 59 on the stage 77. The ultraviolet curable ink 55 corresponding to the above is cured and fixed to the work 50.
[0044]
By transferring the ultraviolet curable ink 55 having a pattern corresponding to the louver to the formation surface 50a of the work 50 by the screen printing method or the offset printing method described above, as shown in FIG. A louver 60 (corresponding to a display light optical path direction regulating member) made of the curable ink 55 is formed.
[0045]
Here, the image light generated by the dial 15 of the combination meter 1, the indicator 21 of the pointer 19, the lens 39, and the front cover 43 is reflected on the windshield above the combination meter 1. For the purpose of preventing, particularly when the dial 15, the lens 39, and the front cover 43 whose positions are fixed are used as the work 50, as shown in FIG. The louver 60 in which a large number of strip-shaped light-shielding portions 61 (corresponding to the light-shielding portions) extending over the entire width in the left-right direction in the arrangement state in FIG. What is necessary is just to form in the formation surface 50a of the workpiece | work 50. FIG.
[0046]
Thereby, the vertical angle of the optical path of the image light generated in the combination meter 1 from the portion where the surface 50a of the work 50 secured between the upper and lower adjacent light shielding portions 61 is exposed to the front of the combination meter 1 is set. The upper and lower intervals of the part of the work 50 at which the formation surface 50a is exposed and the projection height of the light shielding part 61 from the formation surface 50a are regulated within an angle range.
[0047]
Therefore, for example, the positional relationship of the combination meter 1 with respect to the windshield is replaced with the positional relationship of the work 50 with respect to the windshield, and the display emitted from the work 50 is shown in the principle diagram of FIG. Of the optical path L1 of the image light L of the image, the optical path component directed to the windshield (corresponding to the unnecessary area) indicated by reference symbol A in FIG. 14 is the vertical distance between the work 50 portions where the formation surface 50a is exposed and the formation surface 50a. Is blocked by the louver 60 due to the relationship with the protruding height of the light shielding portion 61 from the louver.
[0048]
Therefore, the image light L of the display image reaches the windshield A and is reflected, and this reflected display image is visually recognized from the driver's viewpoint area (corresponding to the viewing area) indicated by the reference sign B in FIG. The optical path L1 of the image light L of the display image is restricted to only components that go from the viewpoint area B to the upper and lower area range that can be viewed by the line of sight of the work 50.
[0049]
14 shows a case where the work 50 is arranged so that the formation surface 50a on which the louver 60 is formed is located close to the windshield A and the viewpoint area B, the illumination is seen from the viewpoint area B. When the display surface is on the other side of the workpiece 50, the workpiece 50 may naturally be arranged so that the formation surface 50a on which the louver 60 is formed is positioned far from the windshield A or the viewpoint region B.
[0050]
Thus, according to the manufacturing method of the display light optical path direction regulating member of the present embodiment, the louver 60 is formed on the workpiece 50 by printing with the ultraviolet curable ink 55 using the screen printing method or the offset printing method. did.
[0051]
For this reason, according to the positional relationship between the combination meter 1 and the windshield, the vertical distance between the light shielding portions 61 and the protrusion height of the light shielding portion 61 from the formation surface 50a are set to dimensions as appropriate, so that the abbreviation of the combination meter 1 is obtained. While maintaining the optical path of the image light toward the driver located in front, the optical path of the image light is blocked by blocking the unnecessary optical path of the image light, such as blocking the optical path toward the windshield above it. The louver 60 that can be regulated in an arbitrary direction is attached to a work 50 with a conventional film having a light-shielding portion and a light-transmitting portion formed in a stripe pattern, a method using a photosensitive resin, or an etching method. It can be obtained by printing by a screen printing method, an offset printing method, or the like with low cost and simple labor compared to forming the light shielding portion directly on the workpiece.
[0052]
Moreover, according to the manufacturing method of the display light path direction regulating member of the present embodiment, the louver 60 is formed on the workpiece 50 by printing the ultraviolet curable ink 55 using the screen printing method, thereby forming the louver 60. Not only can the installation cost be kept low, but the cost of the printing plate itself can be reduced, and the running cost can be kept low.
[0053]
Furthermore, according to the manufacturing method of the display light path direction regulating member of the present embodiment, the louver 60 is formed on the workpiece 50 by printing by a screen printing method, an offset printing method, or the like. By adjusting or printing the UV curable ink 55 in the same pattern on the surface 50a of the workpiece 50 and laminating it, the projection height of the light shielding portion 61 from the surface 50a can be set finely and arbitrarily, and the image light The direction of blocking the unnecessary optical path and regulating the direction of the optical path of the image light can be finely set to an arbitrary direction.
[0054]
In the present embodiment, the case where the louver 60 in which a large number of the strip-shaped light shielding portions 61 are arranged at intervals in the direction orthogonal to the extending direction has been described, but the light shielding portions constituting the louver 60 are not described. The pattern is not limited to such a linear stripe pattern, but may be a curved stripe pattern, or a lattice pattern composed of vertical and horizontal straight lines, and a number of points may be regular or irregular. Any pattern can be used as long as it can uniquely regulate the direction of the optical path of the image light as a whole, such as a spray arrangement arranged in the above.
[0055]
In the present embodiment, the case where the louver 60 is formed on the formation surface 50a that is one surface of the workpiece 50 has been described. For example, the workpiece 50 is reversed halfway in the screen printing method, or the drum is formed in the offset printing method. 73 is a pair of upper and lower parts, the conveyor 71 is divided before and after the pair of drums 73, 73, and when the workpiece 50 passes between the upper and lower drums 73, 73, the formation surface 50a and the opposite surface The louvers 50 may be formed on both surfaces of the workpiece 50 by bringing the surfaces 73a and 73a of the upper and lower drums 73 and 73 into contact with both surfaces.
In that case, the offset printing method is more advantageous than the screen printing method in terms of mass production by high-speed processing and improvement in manufacturing efficiency.
[0056]
When the louvers 50 are formed on both surfaces of the workpiece 50, the distance between the light shielding portions 61 of the louvers 60 formed on each surface of the workpiece 50 and the protruding height, or the pattern of the louvers 60 are mutually determined. It may be set differently.
[0057]
Further, in the present embodiment, the ultraviolet curable ink 55 is used as a material for forming the light shielding portion 61 of the louver 60. However, a thermosetting resin ink that is cured by heating may be used. In any case with the curable resin ink, the ink after printing is cured in a non-contact manner to prevent the ink from peeling from the forming surface 50a due to the contact with the ink during the curing operation, and to shorten the curing time. Can be achieved.
In this respect, not only the ultraviolet curable ink 55 or the thermosetting resin ink, but also an ink that is cured by at least one of a physical change such as curing by drying and a chemical change by reaction with gas is selected. As long as this is done, the same effect can be obtained.
Further, the curing of the ink after printing may be carried out by natural drying by leaving it as it is unless there is a particular need for shortening the time.
[0058]
Moreover, in this embodiment, the image from the surface of the member which the light which illuminates a display permeate | transmits an inside, such as the dial 15 in the vehicle combination meter 1, the instruction | indication part 21 of the pointer | guide 19, the lens 39, and the front cover 43, is shown. Although the case where the optical path of light is regulated has been described, the present invention is, for example, a display unit such as a scale or characters formed by applying ultraviolet fluorescent ink on the dial surface by irradiating the dial surface with ultraviolet rays from the front. Is not limited to the display surface illuminated by transmitted illumination from the back side, such as when the optical path of the image light of the emitted display unit is regulated, and the display surface illuminated directly or indirectly by illumination Needless to say, the present invention can be widely applied to the case where the optical path of the image light from is regulated.
[0059]
In the present embodiment, the front and back surfaces of the dial plate 15, the front and back surfaces of the indicating portion 21 of the pointer 19, the front and back surfaces of the lens 39, and the front and back surfaces of the front cover 43 in the vehicle combination meter 1 are used as the work 50. However, the present invention is for lighting calculation switches around driver's seats, monitor screens in car navigation systems and in-vehicle television receivers, and for calculating charges mounted on taxi and driving agency accompanying vehicles. In order to regulate the direction of the optical path of the image light of the display image of components and devices having a display surface to be illuminated such as a display surface of a meter to a desired direction, these display surfaces and their display surfaces Needless to say, the present invention is widely applicable to the case where the display light path direction regulating member is formed on the surface of the light transmissive member disposed on the optical path of the image light.
[0060]
Furthermore, the present invention is not only for forming a display light path direction regulating member for preventing formation of an unnecessary display image in a vehicle, but also near a display surface illuminated by illumination light, which has nothing to do with the vehicle. The display light is reflected by the arrival of the image light so that a display image different from the original display image to be visually recognized by the viewer from the display surface is reflected, and the display image is visually recognized there. If there is a member that will cause the display image to be reflected on the member, it will be in the way of visually recognizing the original display image, so it is necessary to prevent unnecessary image light from reaching such peripheral members. Of course, the present invention can be widely applied.
[0061]
【The invention's effect】
As described above, according to the method for manufacturing the display light path direction regulating member of the present invention described in claim 1, the light path regulation arranged on the optical path of the image light of the display image from the display surface illuminated by the vehicle. A light-shielding portion that is formed on a surface and blocks a part of the image light from the display surface toward the viewing region side that visually recognizes the display surface from the optical path restriction surface is arranged in a predetermined pattern via the optical path restriction surface And a method of manufacturing a display light path direction regulating member that regulates formation of an unnecessary optical path of the image light that travels from the optical path regulating surface to an unnecessary area other than the viewing area, the light shielding by the optical path regulating surface. A light shielding material is printed in the predetermined pattern on the optical path regulating surface portion corresponding to the portion.
[0062]
For this reason, the light shielding portion of the display light optical path direction regulating member arranged in a predetermined pattern is disposed on the optical path regulating surface arranged on the optical path of the image light of the display image from the display surface illuminated by the vehicle. Since it is directly formed by printing, the light shielding material is printed on the optical path regulating surface by using a printing plate, and the light shielding material is cured by at least one of a physical change and a chemical change. In addition, the display light path direction regulating member can be manufactured at low cost by a method that does not require printing.
[0063]
Moreover, according to the manufacturing method of the display light path direction regulating member of the present invention described in claim 1, when the light path regulating surface is on both sides of the member through which the image light is transmitted, the light shielding material is printed on both sides simultaneously. It is also possible to manufacture the display light path direction regulating member, and the direction of the optical path of the image light as a whole is changed by making the directions of the optical paths of the image light blocked by the display light path direction regulating members on the respective surfaces different from each other. Complex or fine settings can be made.
[0064]
In addition, according to the manufacturing method of the display light path direction regulating member of the present invention described in claim 1, since the light shielding portion of the display light path direction regulating member is formed by printing, the printing height of the light shielding material is adjusted. Therefore, the restriction direction of the optical path of the image light can be set complicatedly or finely.
[0065]
Also, Claim 1 According to the manufacturing method of the display light path direction regulating member of the present invention described in the above, the light shielding material is printed on the light path regulating surface portion by the screen printing method. For the production of the light path direction regulating member for the display light path with respect to the light path regulating surface by taking advantage of the screen printing method of imprinting ink from the screen plate with a squeegee and transferring the ink that has passed through the printing pattern of the screen plate to the printing target. Not only can the installation cost be kept low, but also the cost of the printing plate itself can be kept low.
[0066]
further, Claim 1 According to the manufacturing method of the display light path direction regulating member of the present invention described in the above, the printing of the light shielding material on the optical path regulating surface portion is performed by the offset printing method. Taking advantage of the offset printing method of transferring ink from the rotating roll to the printing object, the equipment cost for manufacturing the display optical path direction regulating member for the optical path regulating surface can be kept low, and multiple optical path regulation It is possible to achieve continuous and high-speed production of the display light path direction regulating member with respect to the surface, and to achieve efficiency through mass production.
[0067]
Also, Claim 1 According to the manufacturing method of the display optical path direction regulating member of the present invention described in the above, the light shielding material printed on the optical path regulating surface portion is cured by at least one of a physical change and a chemical change, and the Since it is fixed on the optical path regulating surface portion, the light shielding material can be fixed on the optical path regulating surface in a shorter time than the usual drying.
[0069]
Furthermore, according to the manufacturing method of the display light path direction regulating member of the present invention described in claims 1 to 3, In the case of misalignment, the light shielding material is cured and the light shielding material is fixed to the light path regulating surface without contact with the light shielding material or the light path regulating surface, and the light shielding material is peeled off from the light path regulating surface when the light shielding material is cured. Can be prevented and fixed reliably.
[0070]
Claim 1 According to the manufacturing method of the display light path direction regulating member of the present invention described in the above, since the light shielding material is laminated and printed in the predetermined pattern a plurality of times on the light path regulating surface portion. The printing height can be adjusted not only by the height of the light shielding material by one printing, but also finely adjusted by selecting the number of printing times of the light shielding material.
[Brief description of the drawings]
FIG. 1 is a front view of a vehicle combination meter capable of forming a display light path direction regulating member by employing a manufacturing method according to the present invention.
FIG. 2 is an enlarged cross-sectional view of an essential part schematically showing a basic configuration of the combination meter shown in FIG.
FIG. 3 is an explanatory diagram showing an embodiment of a process in the case where a louver is formed by a screen printing method by applying the present invention to the elements in the combination meter of FIG.
4 is an explanatory diagram showing an embodiment of a process in the case where a louver is formed by screen printing by applying the present invention to the elements in the combination meter of FIG. 1. FIG.
FIG. 5 is an explanatory diagram showing an embodiment of a process in the case of forming a louver by a screen printing method by applying the present invention to elements in the combination meter of FIG.
6 is an explanatory diagram showing an embodiment of a process in the case where a louver is formed by a screen printing method by applying the present invention to elements in the combination meter of FIG. 1;
7 is an explanatory diagram showing an embodiment of a process in the case where a louver is formed by screen printing by applying the present invention to the elements in the combination meter of FIG. 1. FIG.
FIG. 8 is an explanatory diagram showing an embodiment of a process in the case of forming a louver by an offset printing method by applying the present invention to the elements in the combination meter of FIG.
FIG. 9 is an explanatory diagram showing an embodiment of a process in the case of forming a louver by an offset printing method by applying the present invention to the elements in the combination meter of FIG.
FIG. 10 is an explanatory diagram showing an embodiment of a process in the case of forming a louver by an offset printing method by applying the present invention to the elements in the combination meter of FIG.
FIG. 11 is an explanatory diagram showing an embodiment of a process in the case where a louver is formed by an offset printing method by applying the present invention to the elements in the combination meter of FIG.
12 is an explanatory diagram showing an embodiment of a process in the case where a louver is formed by an offset printing method by applying the present invention to the elements in the combination meter of FIG. 1. FIG.
13 is a perspective view schematically showing a workpiece on which a louver is formed by the screen printing method of FIGS. 3 to 7 or the offset printing method of FIGS. 8 to 12. FIG.
14 is a principle diagram showing the function performed by the louver by replacing the positional relationship of the combination meter of FIG. 1 with respect to the windshield with the positional relationship of the workpiece of FIG. 13 with respect to the windshield.
[Explanation of symbols]
50a Work forming surface (optical path regulating surface)
55 UV curable ink (shading material)
61 Louver shading part (shading part)
A Windshield (unnecessary area)
B Driver viewpoint area (viewing area)
L image light
L1 Image light path

Claims (3)

It is formed on the optical path regulating surface arranged on the optical path of the image light of the display image from the illuminated display surface, and is directed to the viewing region side where the display surface is viewed from the optical path regulating surface via the optical path regulating surface. A light-shielding portion that blocks a part of the image light from the display surface is arranged in a predetermined pattern, and the formation of an unnecessary optical path of the image light from the optical path regulation surface toward an unnecessary area other than the viewing area is restricted. A method of manufacturing a display light optical path direction regulating member
Screen printing performed by applying a screen plate to the formation surface of the display optical path direction regulating member on the optical path regulating surface portion corresponding to the light shielding portion on the optical path regulating surface , or printing of the display optical path direction regulating member the surface of the drum which edition has been formed is brought into contact with the forming surface offset printing performed, printing light material shielding by the ink to cure at least one of the change of the physical change and chemical change in said predetermined pattern And
The light shielding material printed on the optical path regulating surface part is cured by at least one of a physical change and a chemical change and fixed on the optical path regulating surface part ,
The light shielding material was stacked on the light path regulating surface portion by repeatedly printing the light shielding material in the predetermined pattern .
A method of manufacturing a display light optical path direction regulating member. 2. The display light path direction regulating member according to claim 1, wherein an ultraviolet curable ink is used as the light shielding material, and the ultraviolet curable ink printed in the predetermined pattern on the optical path regulating surface portion is cured by irradiation with ultraviolet light . Production method. The display light path direction regulating member according to claim 1, wherein a thermosetting resin ink is used as the light shielding material, and the thermosetting resin ink printed in the predetermined pattern on the optical path regulating surface portion is cured by heating. Manufacturing method.

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