JP4729786B2 - Display board for vehicle display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display plate of a display device such as an instrument installed in a vehicle such as an automobile.
[0002]
[Prior art]
Conventionally, for example, some passenger car instruments include an instrument panel and a light source disposed on the back side of the instrument panel. Here, for example, the instrument panel is configured by printing a translucent portion made of scales and characters and a non-transparent portion as a background portion on the surface of a resinous transparent substrate such as polycarbonate by a screen printing method. Is normal. Thus, for example, at night, only the characters and scales that are light-transmitting portions of the instrument panel are displayed brightly by illuminating the instrument panel with a light source.
[0003]
[Problems to be solved by the invention]
By the way, in the above-mentioned meter, since the screen printing method is used as described above for printing on the surface of the meter plate, it is possible to increase the print density of the opaque portion. However, in passenger car instruments, there are a wide variety of vehicle types, displacements, grades, etc. of passenger cars. Accordingly, there are a wide variety of instrument panels and the printed contents are different from each other. Therefore, the screen printing method, which is a mass printing method, has a problem in that it is necessary to change the printing plate, prepare ink, set conditions, etc. every time the type of instrument panel is different. In particular, when the printing lot of the instrument panel is a small lot, the time required for the setup becomes longer than the actual printing time, resulting in an increase in manufacturing cost. In addition, there is a problem in that it takes time for the plate making process, plate making, ink preparation, etc. in the production of the prototype of the instrument panel.
[0004]
In response to this, it is conceivable to adopt an immediate response printing technique (so-called on-demand printing technique) that is becoming popular in the commercial printing field in recent years. Unlike the screen printing method, this on-demand printing method is superior in that it enables high-mix, small-lot printing at a low speed and without using a printing plate. However, since this on-demand printing method is mainly intended for printing on paper, it is possible to stably print on the surface of the above-mentioned resinous transparent substrate that requires durability, and to transmit light. In principle, it is not suitable for printing with a high density of parts.
[0005]
In view of the above, the present invention provides a display panel for a display device for a vehicle that is substantially the same as that using a screen printing method by devising how to use an on-demand printing method in order to deal with the above-described problems. With the goal.
[0006]
[Means for Solving the Problems]
In solving the above-described problem, the display panel for a vehicle display device according to the invention described in claim 1 includes a translucent substrate (10) and a background portion (30g) as a non-light-transmitting portion, and the interior of the background portion. And a printing layer (30) formed by printing on the surface of the translucent substrate so as to have the translucent portions (30a to 30e).
[0007]
The display panel includes an adhesive layer (20) formed on the surface of the translucent substrate, and the adhesive layer is made of a resin having an elastic modulus at 80 ° C. of 1 × 10 ⁵ Pa or more . On-demand printing means prints on the surface of the adhesive layer so as to have a background portion and a translucent portion in the background portion based on print data.
[0008]
In this way, the printing layer is printed and formed by the on-demand printing means so as to have the background portion on the surface of the adhesive layer and the translucent portion in the background portion based on the print data. Unlike the case of printing, replacement of the printing plate, preparation of ink preparation, condition setting, and the like are not required, so that the printing time can be greatly shortened, and the display board can be obtained at a low cost with a short delivery time.
[0009]
In addition, since the printing layer is printed on the surface of the adhesive layer formed on the surface of the translucent substrate, the printed layer is subjected to the translucent substrate via the adhesive layer under the adhesive force of the adhesive layer. It adheres uniformly to the surface. Therefore, the printed layer does not peel from the surface of the translucent substrate. Therefore, a display board having practically the same quality as that printed by screen printing can be obtained.
[0010]
According to a third aspect of the present invention, in the display panel for a vehicle display device according to the first or second aspect , the gloss adjusting layer (40) for adjusting the surface of the printing layer to remove the gloss of the surface. Is formed by on-demand printing means.
[0011]
As a result, the gloss of the surface of the printed layer is adjusted and erased by the gloss adjustment layer, so that even if external light such as sunlight enters the display board through the gloss adjustment layer, the reflection intensity of this incident light is greatly relaxed. Is done. Further, as described above, the gloss of the surface of the printing layer is adjusted by the gloss adjusting layer and erased, so that the appearance on the surface of the printing layer is hardly noticed. Therefore, even when the printed layer of the display board is viewed through the gloss adjusting layer, very good visibility can be secured.
[0012]
According to a fourth aspect of the present invention, in the display panel for a vehicle display device according to any one of the first to third aspects, the printing layer records variable information about the vehicle at an outer peripheral edge portion thereof. The variable information recording / display unit (30f) for display is provided.
[0013]
As a result, when the outer peripheral portion of the printed layer corresponds to a portion outside the visible range of the printed layer or near the portion to be removed by external processing, a barcode indicating product information, production information, or the like is displayed on the outer peripheral portion. By adding a code or the like as a variable information recording / displaying section and recording and displaying it, variable production information can be folded. In addition, by printing the edition number on the display board of the limited vehicle as a variable information recording / display unit for each product, the merchantability of the instrument can be improved without causing a significant increase in cost.
[0014]
According to a fifth aspect of the present invention, in the display panel for a vehicle display device according to the fourth aspect , the variable information recording / display unit includes production information by a Kanban system relating to the display panel as variable information. .
[0015]
Also by this, the same effect as that of the invention of the fourth aspect can be achieved.
[0018]
In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 has shown an example of the instrument board employ | adopted as an instrument for passenger cars. The instrument panel includes a transparent substrate 10, an adhesive layer 20, a printing layer 30, and a gloss adjustment layer 40.
[0020]
The transparent substrate 10 is made of a transparent plate-shaped synthetic resin. The adhesive layer 20 is formed by applying a layer on the surface 11 of the transparent substrate 10 with a transparent resin adhesive.
[0021]
The print layer 30 is printed and formed in layers on the surface 21 of the adhesive layer 20 by an on-demand printing machine, and the print layer 30 has four arc-shaped scale portions 30a to 30d, directions as shown in FIG. An instruction mark portion 30e and a variable information recording / display portion 30f are provided in the background portion 30g.
[0022]
On the left side of the instrument panel in FIG. 1, the scale portion 30a is configured by arranging three slit-shaped scales 31 centered on the through-hole portion H1 and spaced radially in the arc direction. On the right side of the instrument panel in FIG. 1, the scale portion 30 b is configured by arranging three slit-shaped scales 32 centered on the through-hole portion H2 and spaced radially in the arc direction.
[0023]
The scale part 30c is configured such that nine slit-shaped scales 33 are arranged radially at intervals in the arc direction around the through-hole part H3 on the left side of the central part of the instrument panel. Further, the scale portion 30d is configured such that nine slit-shaped scales 34 are arranged radially at intervals in the arc direction around the through-hole portion H4 on the right side of the central portion of the instrument panel. In addition, each through-hole part H1 thru | or H4 is each formed in the plate | board thickness direction in the position shown in FIG.
[0024]
The direction indication mark portion 30e is provided with both direction indication marks 35 and 36. These direction indication marks 35 and 36 are opposite to each other on the upper portion of the instrument panel in FIG. It is formed to have a direction of an arrow. The variable information recording / display unit 30f is configured by arranging five display units 37 at intervals on the lower edge of the instrument panel shown in FIG.
[0025]
The background portion 30g is an opaque portion, and the scale portions 30a to 30d and the direction indication mark portion 30e are formed as the transparent portions in the opaque portion. The variable information recording / display unit 30f is formed at a position hidden by the annular bottom wall of the facing plate in the opaque portion when an annular facing plate is mounted on the instrument panel. Here, the variable information recording / display unit 30f includes kanban information (information for directly printing and producing the required number of instrument panels), barcodes indicating product information, production information, and the like, QR codes. Etc. are included.
[0026]
The gloss adjusting layer 40 is formed on the surface 38 of the printing layer 30 by a matte material and printed in layers by an on-demand printer. The gloss adjusting layer 40 serves to erase the gloss caused by external light on the surface of the printing layer 30.
[0027]
In the present embodiment configured as described above, the instrument panel is manufactured as follows. First, transparent plate-like polycarbonate (manufactured by Mitsubishi Gas Chemical Co., Inc.) is adopted as the plate-like synthetic resin, and the plate-like synthetic resin is cut into a predetermined shape to form the transparent substrate 10. The plate-like synthetic resin is not limited to polycarbonate, but may be polyethylene terephthalate, nylon, ABS, or the like.
[0028]
Next, a polyester resin adhesive (having an elastic modulus of 5 × 10 ⁵ at 80 ° C.) is adopted as a transparent resin adhesive, and the transparent resin adhesive is applied to the surface of the transparent substrate 10 to 20 μm to 20 μm. The adhesive layer 20 is formed by applying a layer having a thickness of 30 μm. The material for forming the adhesive layer 20 is not limited to a resinous adhesive, and may be a translucent adhesive.
[0029]
Incidentally, an instrument panel manufactured to have the same configuration as the above instrument panel except that the adhesive layer 20 is formed of a resinous adhesive having an elastic modulus of 8 × 10 ⁴ at 80 ° C. is prepared as a comparative example. When this comparative example was compared with the instrument panel in the above embodiment, the following results were obtained.
[0030]
That is, the instrument panel described in the above embodiment and the above comparative example did not show any abnormality even when left for 1000 hours in an atmosphere of 95% humidity and 65 ° C. However, when the instrument panel was left in an atmosphere of 100 ° C. for 1000 hours, the instrument panel described in the above embodiment did not show any abnormality, but the comparative example showed an abnormality and caused floating at the interface of the transparent substrate.
[0031]
From such examination results, the material of the adhesive layer can be selected according to the on-demand printing method of the printing layer, but in a passenger car, it can generally be 80 ° C. or more due to sunlight, internal lighting, heat dissipation of electrical equipment, etc. Therefore, a resin that requires heat resistance and has an elastic modulus of 1 × 10 ⁵ (Pa) or higher at 80 ° C. is desirable, and a resin that has an elastic modulus of 1 × 10 ⁵ (Pa) or higher at 100 ° C. is more preferable. It turns out that. Specifically, a polyester resin, a urethane resin, an acrylic resin, or the like can be used as a material for forming the adhesive layer.
[0032]
After the adhesive layer 20 is thus formed, the print layer 30 is printed and formed in a layered manner on the surface of the adhesive layer 20 as follows. Here, an ink jet printer or an electrophotographic printer (for example, a laser printer) is adopted as the on-demand printer. However, the on-demand printing machine is configured by the appropriate control device that is programmed to print the configuration of the printing layer 30 described above on the surface of the adhesive layer 20 using the toner by the on-demand printing method. To be controlled. Of the toners, a white toner employs a titanium oxide or silicon pigment, and a black toner employs a carbon black pigment.
[0033]
Then, the transparent substrate 10 on which the adhesive layer 20 is formed as described above is set in the on-demand printing machine. Then, the on-demand printing machine is controlled by the control device, and printing is performed on the surface of the adhesive layer 20 with the toner so as to have the configuration of the printing layer 30 described above. The light transmission density of the background portion 30g as an opaque portion is measured by a DM500 type transmission densitometer manufactured by Dainippon Screen Co., Ltd. and needs to be 2.0 or more. It is desirable to do.
[0034]
As described above, the printing layer 30 is not directly printed on the surface of the transparent substrate 10, but is printed on the surface of the adhesive layer 20 formed on the surface of the transparent substrate 10. The print layer 30 can be in close contact with the surface of the transparent substrate 10 through the adhesive layer 20 under the adhesive force of the adhesive layer 20. As a result, even if the on-demand printing method by the on-demand printing machine is used, the printing layer 30 does not peel from the transparent substrate 10. Thereby, the stability of repeated printing in the printing layer 30 and the adhesion of the color material layer can be improved.
[0035]
In addition, by using the on-demand printing method in this way, in manufacturing the instrument panel, the problems caused by the screen printing method described at the beginning of the present specification can be surely solved, and many can be performed quickly and at low cost. It is possible to realize small lot printing of product types.
[0036]
After that, the gloss adjusting layer 40 is formed by printing the matte material on the surface of the printing layer 30 in a layered manner by the on-demand printing machine. The glossiness (glossiness) of the gloss adjusting layer 40 needs to be lowered to a predetermined value. However, the glossiness is desirably 20 or less at an angle of 60 degrees, and further 10 or less in a passenger car instrument panel. If so, it is preferable. From such a viewpoint, the matte material is made light-resistant by using a transparent additive such as silica or acrylic resin powder.
[0037]
In the present embodiment, the gloss adjustment layer 40 is formed by the following method. That is, it is a method of printing on the surface of the adhesive layer 20 uniformly in a layered pattern using transparent ink or toner by an on-demand printing method.
[0038]
In screen printing, the fine dot forming ability is as low as 40 to 80 lines / inch and the halftone dots appear to be a pattern. Therefore, in general, the surface of the printed layer is made uneven by an additive that is a mat material. However, according to the on-demand method, fineness of 100 lines / inch or more can be obtained, so that uniform and fine halftone dots or fine patterns can be formed with a transparent printing layer. Since these halftone dots or fine patterns are very fine, they appear to be matte in appearance. Further, according to such a method, there is an advantage that the glossiness can be adjusted by data as well as suitable for the production of a small printing lot.
[0039]
The on-demand method for forming the gloss adjusting layer requires a certain layer thickness, and the on-demand method using a non-liquid ink or toner is suitable from the viewpoint of giving an uneven feeling. Specifically, a hot melt type thermal transfer system or an electrophotographic system using solid toner is suitable for forming the gloss adjusting layer. It is also possible to add a UV absorber to the gloss adjusting layer in order to increase the durability of the printing layer. Further, the transparent material of the gloss adjusting layer does not necessarily need to be transparent, and may be a material having a color in a range that does not affect the printing color of the base or a color of the same color system. This completes the production of the instrument panel.
[0040]
Note that, as the on-demand printing machine described in the above embodiment, a hot-melt transfer type printing machine is adopted, and the printing layer 30 may be printed on the surface of the adhesive layer 20 by this printing machine. A printed layer 30 similar to that described in the above could be obtained. Here, in the hot melt transfer type printing machine, it is desirable from the viewpoint of light resistance that the pigment system used for the ink ribbon is the same pigment system as that of the electrophotographic system. From the point of density, it is possible to increase the translucency by adjusting the thickness of the ink layer of the ribbon and the pigment ratio, etc., compared to the electrophotographic method, but black printing material from the viewpoint of preventing the occurrence of pinholes It is desirable to print multiple times. In addition, in the case of the hot-melt transfer method, a release layer that improves transferability is provided at the interface between the hot-melt ink layer of the ink ribbon and the support polyester film. It is possible to reduce the gloss.
[0041]
In carrying out the present invention, unlike the above embodiment, an adhesive layer is formed on the back surface of the transparent substrate, a printed layer is formed on the outer surface of the adhesive layer, and a gloss adjustment layer is formed on the surface of the transparent substrate. You may do it.
[0042]
In the above embodiment, the gloss adjusting layer 40 is also printed by an on-demand printing machine. Instead of this, the gloss adjusting layer 40 is a two-component type manufactured by Jujo Chemical Co., Ltd. by a screen printing machine. You may make it print on the surface of the printing layer 30 using a matte clear ink. The instrument panel produced in this manner has little change in glossiness even in an atmosphere of 100 ° C., and is suitable as an instrument panel for an instrument that is exposed to a high temperature environment depending on the installation conditions of a light source and the like.
[0043]
Further, as the transparent substrate 10, a plate-like polycarbonate having an embossed shape on the surface (MO1 type manufactured by Mitsubishi Gas Chemical Company) is used, and the adhesive layer 20 and the printing layer 30 are formed on the back surface of the transparent substrate so that the transparent substrate 10 is transparent. The substrate 10 may have a role as a gloss adjustment layer. Note that the embossed shape of the surface of the transparent substrate may be obtained by coating a coating material to which beads of a predetermined particle size or a mat material are added in advance. In consideration of scratch resistance, fine acrylic beads were optimal as beads having a predetermined particle size.
[0044]
In the practice of the present invention, the gloss adjustment layer 40 may be formed by the following method without being limited to the method described in the above embodiment.
[0045]
In the first method, when the printing lot is large to some extent, the mat clear ink is screen-printed on the surface of the adhesive layer 20. According to this method, it is not necessary to make a printing plate for each printing pattern on the instrument panel, so printing can be performed with a shared printing plate. Since the plate making and plate making processes are not required each time, there is no significant increase in cost. In addition, since the type of ink can be selected, highly heat-resistant ink is used because of environmental factors such as heat, humidity, light aggregation, and oxidation of the toner and ink in the printing layer formed by on-demand printing. By that. The printed layer can be protected. For example, as the mat clear ink, a two-component cross-linked ink is effective.
[0046]
As a second method, there is a method in which a film having a predetermined glossiness having an adhesive layer or an adhesive layer is laminated with a laminator or the like at room temperature or high temperature. According to this method, since the film thickness can be secured, it is possible to add a large amount of UV absorbing material and the like, which is effective in the case of on-demand printing in which only a color material that is weak against ultraviolet rays can be selected. As an example of the film, for example, a fluorine-based film such as DuPont's Tedra film or Asahi Glass's Aflex is preferable from the viewpoint of heat resistance and light resistance.
[0047]
Further, in the implementation of the present invention, in the printed layer of the instrument panel described in the above embodiment, screen printing is performed except for the area including the translucent part in the background, and only the area including the translucent part is turned on. You may make it perform demand printing.
[0048]
Here, screen printing is a method that can be produced at a low cost if the number of printing lots is large. Therefore, a portion of the scale part of the instrument panel where the display contents such as the speedometer do not fluctuate is printed by screen printing. For example, the tachometer scale By using screen printing and on-demand printing in combination with the on-demand printing of scales whose display contents are likely to fluctuate depending on the displacement and grade of passenger cars, production at a lower cost is possible. Become.
[0049]
In this case, the printing layer can be temporarily printed on an easy-adhesion-treated polyethylene terephthalate film or the like without directly printing on the transparent substrate, and this film can be transferred to the surface of the transparent substrate as a transfer foil. This is effective when the surface of the transparent substrate is not flat or when the transparent substrate is thick and there is a problem with the transport system of the printing press.
[0050]
Moreover, in carrying out the present invention, the present invention may be generally applied to instrument panels of automobiles and other vehicle instruments and display panels of display devices without being limited to instrument panels of passenger car instruments.
[Brief description of the drawings]
FIG. 1 is a front view of an instrument panel showing an embodiment of the present invention.
2 is a cross-sectional view taken along line 2-2 in FIG.
[Explanation of symbols]
10 ... Transparent substrate, 20 ... Adhesive layer, 30 ... Print layer,
30a thru 30d ... scale part, 30e ... direction indication display part, 30g ... background part,
40: Gloss adjustment layer.

Claims (5)

Formed by printing on the surface of the translucent substrate so as to have a translucent substrate (10) and a background portion (30g) as a non-translucent portion and to have translucent portions (30a to 30e) in the background portion. In a display board for a display device of a vehicle comprising a printed layer (30) to be provided,
An adhesive layer (20) formed on the surface of the translucent substrate is provided, and the adhesive layer is made of a resin having an elastic modulus at 80 ° C. of 1 × 10 ⁵ Pa or more.
The printing layer is printed on the surface of the adhesive layer so as to have the background portion and the translucent portion in the background portion based on print data by on-demand printing means. Device display board. The display panel for a vehicle display device according to claim 1, wherein the adhesive layer has a thickness of 20 μm to 30 μm. The display device for a vehicle according to claim 1 or 2 , wherein a gloss adjustment layer (40) for adjusting the surface of the print layer to be delustered is formed by the on-demand printing means. Display board. Said print layer, at its outer periphery, for a vehicle according to any one of claims 1 to 3, characterized in that it has a variable information recording display unit for recording and displaying variable information about the vehicle (30f) Display board for display device. 5. The display panel for a vehicle display device according to claim 4 , wherein the variable information recording / display unit includes production information by a Kanban system relating to the display panel as the variable information.

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