JP6701679B2 - Printed transparent plate and display device using the same - Google Patents

Description

  The present invention relates to a transparent plate with a print layer and a display device using the same.

  Conventionally, a plate to be printed having a smooth flat surface, a metal ground color layer formed by solidly applying a metallic ink on the front surface side of the plate to be printed, and a smoke ink on the upper surface of the metal ground color layer There is an expression method including a design layer in which a metal finish pattern such as a hairline is printed and formed by, for example, (see Patent Document 1, for example). According to this conventional expression method, it is said that the design layer can be made white by removing ink in a pattern shape such as characters, symbols, and marks. As a result, the texture of the ink used in the metal ground color layer is different from that of the ink used in the design layer, and since the design layers stacked in a blank form have irregularities, the pattern can be recognized.

  However, in the conventional expression method described in Patent Document 1, it is necessary to use different inks in the metal ground color layer and the design layer in order to make it possible to recognize the pattern shape of the design or the like with contrast, and the printing process is There were complex issues. Further, even in an application that does not require the color contrast as much as the design, there is a problem that the manufacturing cost becomes high because the complicated printing process as described above is required.

JP, 2000-212134, A

  An object of the present invention is to provide a transparent plate with a printing layer, on which a pattern, a shape, etc. are printed inexpensively by a simple printing process, and a display device using the same.

The transparent plate with a printing layer of the present invention is a transparent plate with a printing layer, comprising a transparent plate having a front surface, a back surface and an end surface, and a printing layer provided on a part of the back surface of the transparent plate. a is, the print layer is to form a print area to be viewed in the front view from the back surface, the print area and the reference area a ₀ having a thickness t _0, the thickness t _k ( k is an integer of 1 or more) and one or more additional areas A _k .
As a result, the reference area A ₀ and the additional area A _k have different thicknesses, and unevenness is created due to the difference in thickness. By irradiating the unevenness with light or the like, contrast is provided, so that the shape and the like can be visually recognized.

An arithmetic average roughness of at least one region R _k of the additional area A _k in a preferred embodiment, the difference between the arithmetic average roughness R ₀ of the reference area A ₀ is greater than or equal to 0.4 nm.
Thereby, since the reference area A ₀ and the additional area A _k have different arithmetic average roughness, when the print area is irradiated with light, a difference occurs in the scattered light amount and the reflected light amount in these areas, Since there is contrast, the shape and the like can be visually recognized.

The additional region and the arithmetic mean roughness _{R kL} of _{A kL,} the arithmetic average roughness of the additional area _{A kS} having a thin thickness _{t kS} than _{t 0 R kS} having a thick thickness _{t kL} than _{t 0} is a preferred form, the The arithmetic mean roughness R _{0 of the} reference region A ₀ satisfies R _kS <R ₀ <R _kL .
According to this embodiment, different character patterns are used for the convex portion formed of the additional area A _kL with respect to the reference area A ₀ and the concave portion formed of the additional area A _kS for the reference area A ₀ . Etc. can be formed. Thus, the formed character pattern can be used for different purposes.

In a preferred form the area _{S 0} of the reference area _{A 0,} the sum [sigma] s _k of the area _{S k} of the additional area _{A k} satisfies the equation (1).
S ₀ /(S ₀ +ΣS _k )≧0.6 (1)
According to this aspect, the difference in the abundance ratio between the reference area A ₀ and the additional area A _{k in} the print area is large, and thus these areas can be easily distinguished.

In a preferred form, the printing area is on the periphery of the transparent plate.
When the printing area is provided at the peripheral edge along the end surface of the transparent plate back surface, the printing area other than the printing area on the transparent plate becomes a non-printing area. When a liquid crystal panel or the like is arranged on the back surface of the non-printing area of the transparent plate of the present embodiment, the printing area looks uniform when the printing area is viewed from the front surface side of the transparent plate through the transparent plate. Further, since the back side of the printing area cannot be seen by the user, the wiring of the liquid crystal panel or the like can be hidden and good aesthetics can be realized.

In a preferred mode, the reference area of the print area is located at the periphery of the transparent plate.
According to the present embodiment, the thickness of the periphery of the end face in the print region is t _0, which is flat, and the additional region A _k formed inside the print region functions as a guide or an alignment mark. It becomes easier to position the members such as, and the members can be easily installed.

In a preferred form, in a front view from the back surface, a contour of a character or a figure is formed at the boundary between the non-printing area without the printing layer or the reference area A ₀ and the additional area A _k .
According to this embodiment, a difference occurs in the amount of scattered light and the amount of reflected light in the non-printed region or the reference region A ₀ and the additional region A _k , which causes contrast, so that the printed region is viewed from the back surface of the transparent plate with the printed layer. In this case, it can be recognized as a character and/or a graphic.

In a preferred form, in a front view from the back side, outlines of characters and figures are formed at the boundary between the non-printing area without the printing layer and the reference area A ₀ and the additional area A _k .
According to the present embodiment, a difference occurs in the amount of scattered light and the amount of reflected light in the non-printed area and the reference area A ₀ and the additional area A _k , which causes contrast, so that the printed area is viewed from the back surface of the transparent plate with the printed layer. In this case, it can be recognized as a character and a figure. For example, a lot number or the like can be formed by forming characters, which facilitates production control.

In a preferred form, the character or figure serves as an alignment mark.
According to this embodiment, a difference occurs in the amount of scattered light and the amount of reflected light in the non-printed region or the reference region A ₀ and the additional region A _k , which causes contrast, so that the printed region is viewed from the back surface of the transparent plate with the printed layer. In this case, it can be recognized as an alignment mark.

In a preferred mode, the alignment mark is provided on a part or the whole of the printing area formed on the peripheral edge of the transparent plate along the outer periphery of the non-printing area.
According to this aspect, when the object is arranged in the non-printing area, the alignment mark serves as a guide for alignment, which makes it easier to determine the arrangement position of the object and is bonded to a liquid crystal panel or the like. Cheap.

In a preferred form, k is 2.
When k=2, printing can be performed with the minimum number of times of printing of 3 times, and the printing area can be formed at the lowest cost and easily.

In a preferred form, the print area is composed of three areas, the standard area A ₀ and the additional areas A ₁ and A _2, and the arithmetic average roughnesses R ₀ , R ₁ , and R ₂ are R ₁ <R _0. <meet the _{R 2.}
According to the present embodiment, a portion having a large arithmetic average roughness formed in the additional area A ₂ with respect to the reference area A ₀ and a portion having a large arithmetic average roughness formed in the additional area A ₁ with respect to the reference area A ₀ . Different character patterns and the like can be formed with small parts. Thus, the formed character pattern can be used for different purposes.

In a preferred form, k is 1.
According to this aspect, the printing area is composed of two areas, that is, the area A ₀ and the area A ₁ , the amount of ink used can be reduced, and the printing process is simple, so that the cost is low. Further, when k=1, the printing can be performed with the minimum number of times of printing of 2, and the printing area can be formed at the lowest cost and easily.

In a preferred form, the print area is composed of two areas, the standard area A ₀ and the additional area A _1, and the respective arithmetic mean roughnesses R ₀ and R ₁ satisfy R ₀ <R ₁ .
According to this embodiment, the areas A ₀ and A ₁ have different arithmetic mean roughnesses, and when light is irradiated to the printing area, a difference occurs in the scattered light quantity and the reflected light quantity in these areas, and the A ₀ Then, since the contrast is increased at A ₁ , the shape and the like can be visually recognized.

In a preferred form the transparent plate is made of glass.
According to this embodiment, since the glass has high strength and also has a good texture, a transparent plate with a printing layer having both high strength and good texture can be obtained.

In a preferred form, the printing areas consist of the same printing material.
According to this aspect, since the reference area A ₀ to the additional area A _k can be formed with one type of printing material, the load on printing equipment is reduced and the cost is reduced.

The display device cover of the present invention includes the transparent plate with the printed layer.
According to this embodiment, when the transparent plate with a print layer of the present invention is used for a display device cover, when the print area is observed through the transparent plate from the front side of the print layer-provided transparent plate, the color of the print area is The taste seems to be uniform and it has excellent aesthetics.

The display device of the present invention is a transparent plate with a print layer described above, a frame supporting the transparent plate with a print layer, a liquid crystal module, an adhesive layer for bonding the transparent plate with a print layer and the liquid crystal panel. Equipped with.
According to the present invention, when the printed area is viewed from the surface of the display device of the present invention through the transparent plate, the printed area looks uniform and the wiring of the liquid crystal panel and the like can be concealed, so that the appearance is excellent. ..

  According to the present invention, it is possible to provide a transparent plate with a printing layer on which a pattern, a shape, etc. are printed at a low cost in a simple printing process, and a display device using the same.

(A) It is the perspective view which showed an example of the whole structure of the transparent plate with a printing layer concerning 1st embodiment of this invention. (B) It is an enlarged view of I. (C) is a sectional view taken along line II-II of I. (A) is a perspective view showing an example of a transparent plate with a printing layer concerning a second embodiment of the present invention, and (b) is a front view when it is seen from the back side. (A) is a perspective view showing an example of a transparent plate with a printing layer concerning a third embodiment of the present invention, and (b) is a front view seen from the back side. (A) is a perspective view of a printing area in which an alignment mark is formed by using the present invention, (b) is a front view as seen from the back surface, (c) is a binarization process of (b). FIG. 3D shows a front view when the liquid crystal panel is arranged based on the alignment mark. (A) is a perspective view of a printing area in which figures and characters are formed using the present invention, (b) is a front view as seen from the back side, (c) is binarization of (b). The front view at the time of processing is shown. (A) is a step of printing one layer on a transparent plate to form a printing area, (b) is a step of printing and laminating up to j layers in the printing area A ₁ to form a printing area, and (c) is A step of forming a print area by printing and stacking up to n layers in the print area A _j is shown. (A) shows a structure in which a transparent plate with a printing layer is arranged in a frame, (b) shows a structure in which an adhesive layer is further attached, and (c) shows a structure in which a liquid crystal module is further attached. It is the figure which showed an example of the character produced in the present Example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to each mode described below. Modifications, improvements, etc. within the scope of achieving the object of the present invention are included in the present invention.

"First embodiment"
[Configuration of transparent plate with printing layer]
FIG. 1A is a perspective view showing the entire configuration of a transparent plate with a printing layer according to the first embodiment of the present invention, and FIG. 1B is an enlarged view of a portion I. The transparent plate 1 with a printing layer of the present embodiment includes a transparent plate 2 and a printing layer provided on a part of the back surface of the transparent plate.

The printing layer forms a printing area 3 in a front view from the back surface, and the printing area 3 includes a reference area A ₀ having a thickness t ₀ on the back surface 6 of the transparent plate 2 and a thickness and at least one additional area A _k having t _k (k is an integer of 1 or more). The k is the same as the number of additional areas A _k . 1A and 1B show an example when k=2, where the reference area is A ₀ and the additional areas are A ₁ and A ₂ . FIG. 1 (c) is a sectional view along II-II in FIG. 1 (b), the thickness of each of the regions _{A 0,} A 1, _{A 2} When _{t 0, t 1, t 2} , t 1 < t ₀ <t ₂ .
As a result, the reference area A ₀ and the additional areas A ₁ and A ₂ have different thicknesses, and unevenness is created due to the difference in thickness. By irradiating the unevenness with light or the like, contrast is provided, so that the shape and the like can be visually recognized.

When the reference area _{A 0} The arithmetic average roughness of the additional area _{A k,} respectively, and _R 0, _{R k,} and _{R k} of at least one region of said additional area _{A k,} and _{R 0} of the reference area _{A 0} Is preferably 0.4 nm or more. For example, in FIG. 1B, the respective arithmetic mean roughnesses R ₀ , R ₁ and R ₂ satisfy the formula (1a), and |R ₀ −R ₁ |>0.4 nm, |R ₀ −R ₂ It is sufficient that either one of |>0.4 nm is satisfied, or both of them may be satisfied. Formula (1b) is preferable, and formula (1c) is more preferable.
|R ₀ −R _k |>0.4 nm (1a)
|R ₀ −R _k |>1 nm (1b)
|R ₀ −R _k |>2 nm (1c)

On the other hand, the upper limit of |R ₀ −R _k | is not particularly limited, but it is preferably the formula (1′). When |R ₀ −R _k | is equal to or less than the upper limit value, when an adhesive is attached to the printing layer when assembling a display device which is a final product, voids are not formed and visibility is improved. Further, there is an advantage that the printing layer is flat, the adhesive can firmly adhere to the printing layer, and the durability of the display device is improved.
|R ₀ −R _k |<100 nm... (1′)
The "arithmetic mean roughness Ra (hereinafter, also referred to as "surface roughness")" is measured by the method described in JIS B0601:2001 (ISO4287:1997).

It has a surface roughness _{R 0} of the reference area _{A 0} having a thickness _{t 0,} and the surface roughness _{R kL} of additional area _{A kL} having a thick thickness _{t kL} than _{t 0,} the thin thickness _{t kS} than _{t 0} surface roughness of the additional area _{a kS} and _{R kS preferably} satisfies the _{R kS <R 0 <R kL} . For example, when the thickness of each region is t ₁ <t ₀ <t ₂ as shown in FIG. 1C, the surface roughness satisfies R ₁ <R ₀ <R ₂ . Furthermore, it is preferable that R ₀ and R ₁ and/or R ₀ and R ₂ satisfy the relationship of formula (1a). As a result, the contrast between the reference area A ₀ and one or more additional areas A _k tends to be increased, and when an observer observes the printing area 3 from the back surface 6 of the transparent plate with a printing layer, it is easy to recognize the difference between these areas. There are advantages.

_{S 0} and the area of the reference area _{A 0} constituting the print area 3, the total area of the area of the additional area _{A k} and _{S k} additional area _{A k} is represented as [sigma] s _k, they satisfy the formula (3a) It is preferable. Since the area S ₀ is 60% or more of the total area (S ₀ +ΣS _k ), there is an advantage that a character pattern or the like can be easily recognized. Formula (3b) is preferable, and formula (3c) is more preferable.
S ₀ /(S ₀ +ΣS _k )≧0.6 (3a)
S ₀ /(S ₀ +ΣS _k )≧0.7 (3b)
S ₀ /(S ₀ +ΣS _k )≧0.8 (3c)
For example, in FIG. 1 (b), the respective area of the region _{A 0,} A 1, _{A 2} When _{S 0, S 1, S 2} , total area [sigma] s _k of the additional area _{A k} becomes _S 1 + _{S 2} . These satisfy the formula (3′). S ₀ is often satisfy more than 60% of the print area the total area _{S 0} + [sigma] s _k, preferably may satisfy 70%, more preferably means that should satisfy 80%.
S ₀ /{S ₀ +(S ₁ +S ₂ )}≧0.6 (3′)

The position where the print area 3 is provided may be only one side of the transparent plate 2 or may not be the peripheral edge, and is not particularly limited. For example, as shown in FIG. 1A, the print area 3 is transparent. It is preferably provided on the periphery of the plate 2. Further, at this time, the portion of the printing region 3 along the end face 7 preferably has a constant thickness, and the thickness is preferably t ₀ . Since the thickness around the end face in the print region 3 is t ₀ and is flat, and the additional region A _k formed inside the print region 3 functions as a guide, it is easy to position a member such as a housing, for example. Easy to install.
The non-printing region 4 is a region without the printing layer when viewed from the back side of the transparent plate 1 with the printing layer.

"Second embodiment"
[Formation of letters]
FIG. 2A is a perspective view of the printing area 3 in which characters are formed by using the present invention, and FIG. 2B is a front view when viewed from the back surface 6. In the transparent plate 1 with a printing layer of the present embodiment, on the back surface of the transparent plate 2, a reference area A ₀ on which the printing layer is deposited and a printing layer having a desired character pattern or the like are laminated. There is a print area 3 consisting of an additional area A ₁ . As a result, the reference area A ₀ and the additional area A ₁ have different thicknesses, and unevenness is created due to the difference in thickness. By illuminating the unevenness with light or the like, contrast is provided, so that characters can be recognized.

In the present embodiment, it is preferable that the respective surface roughnesses R ₀ and R ₁ satisfy the formula (1a) and that |R ₀ −R ₁ |>0.4 nm. The areas A ₀ and A ₁ have different surface roughnesses, and when the printing area 3 is irradiated with light, a difference occurs in the scattered light amount and the reflected light amount in these areas, and a contrast is formed, so that the shape etc. Will be visible.

The surface roughness is preferably R ₁ >R ₀ . Since the amount of light reflection is small in the additional area A ₁ , the observer can easily visually recognize the additional area A ₁ and the reference area A ₀ . When k = 1, felt like impression of the reference area A ₀ and the additional area A ₁ is different from the viewer as shown in FIG. 2 (b), can recognize the additional area A ₁ as the character "A".

"Third embodiment"
[Formation of figure]
FIG. 3A is a perspective view of the printing region 3 in which a figure is formed by using the present invention, and FIG. 3B is a front view when viewed from the back surface 6. The transparent plate 1 with a printing layer according to the present embodiment has a reference area A ₀ formed by a printing layer in which an additional area A ₁ is formed on the back surface of the transparent plate 2 and a desired character pattern or the like is formed on the additional area A _1. There is a print area 3 consisting of As a result, the reference area A ₀ and the additional area A ₁ have different thicknesses, and unevenness is created due to the difference in thickness. By irradiating the unevenness with light or the like, contrast is provided, so that the shape and the like can be visually recognized.

In the present embodiment, it is preferable that the respective surface roughnesses R ₀ and R ₁ satisfy the formula (1a) and that |R ₀ −R ₁ |>0.4 nm. The areas A ₀ and A ₁ have different surface roughnesses, and when the printing area 3 is irradiated with light, a difference occurs in the scattered light amount and the reflected light amount in these areas, and a contrast is formed, so that the shape etc. Will be visible.

The surface roughness preferably satisfies R ₀ >R ₁ . Since the amount of light reflection increases in the additional area A ₁ , the observer can easily visually recognize the additional area A ₁ and the reference area A ₀ . For example, when k=1, the observer feels that the reference area A ₀ and the additional area A ₁ have different impressions as shown in FIG. 3B, and can recognize the additional area A ₁ as the figure “rectangle”.

"Fourth embodiment"
[Formation of alignment mark]
FIG. 4A shows a perspective view of the printing region 3 in which the alignment mark 31 is formed by using the present invention, and FIG. 4B shows a front view when seen from the back surface 6. The transparent plate with a printing layer 1 of the present embodiment has a reference area A ₀ formed on the back surface of the transparent plate 2 and an additional area A ₁ formed with a printing layer so as to form a desired alignment mark 31 thereon. There is a print area 3 consisting of It is preferable that the alignment mark 31 is provided on a part or the whole of the printing region 3 formed on the back surface peripheral edge of the transparent plate 2 and along the outer periphery of the non-printing region 4. For example, when k=1, in FIG. 4B, the alignment marks 31 are formed by the additional areas A ₁ at four positions in the print area 3 along the outer periphery of the non-print area. As a result, the reference area A ₀ and the additional area A ₁ have different thicknesses, and unevenness is created due to the difference in thickness. By irradiating the unevenness with light or the like, contrast is provided, so that the position and the like can be confirmed.

In the present embodiment, it is preferable that the respective surface roughnesses R ₀ and R ₁ satisfy the formula (1a) and that |R ₀ −R ₁ |>0.4 nm. The area A ₀ and the area A ₁ have different surface roughnesses, and when the printing area 3 is irradiated with light, a difference occurs in the scattered light amount and the reflected light amount in these areas, and a contrast is created, so that the alignment mark Will be visible.

When the surface roughness of the non-printed area 4 is R, the surface roughness is preferably R ₁ >R ₀ >R. The amount of reflection of light is different in each area, giving the observer a different impression about the areas A ₁ and A ₀ and the non-printed area. Further, when the position of the alignment mark 31 is recognized by a camera or the like, the alignment mark 31 can be made clearer by setting the amount of light received by the camera and performing binarization processing. For example, as shown in FIG. 4C, only the additional area A _{1 with} a small amount of reflected light is blacked by setting a threshold between the received light amounts from the area A ₁ and the area A ₀ and performing binarization. The reference area A ₀ and the non-printed area having a large amount of reflected light can be made white. As a result, the observer or the camera can recognize the additional area A ₁ as the alignment mark 31.

[Use of alignment mark]
As shown in FIG. 4C, for example, only four alignment marks 31 can be recognized by the binarization processing by the camera. The assembling apparatus equipped with this camera can recognize the in-plane position of the transparent plate 1 with the printing layer by recognizing the alignment mark 31. As a result, the liquid crystal module 8 can be accurately arranged in the area surrounded by the alignment marks 31 as shown in FIG. On the other hand, even when the observer works without using the assembling apparatus, the work may be performed by relying on the four alignment marks 31.

"Fifth Embodiment"
[Formation of figures/characters]
FIG. 5(a) is a perspective view of the printing region 3 in which figures and characters are formed by using the present invention, and FIG. 5(b) shows a front view as seen from the back surface 6. When k is 2, additional areas A ₁ and A ₂ are obtained in addition to the reference area A ₀ . The transparent plate 1 with a printing layer of the present embodiment has a reference region formed on the back surface of the transparent plate 2 with the additional region A ₁ deposited and a printing layer on which a desired character pattern or the like is pierced. There is a print area 3 formed of A ₀ and an additional area A ₂ formed of a print layer on which a desired character pattern or the like is formed. As a result, the reference area A ₀ and the additional areas A ₁ and A ₂ have different thicknesses, and unevenness is created due to the difference in the thicknesses. By irradiating the unevenness with light or the like, contrast is provided, so that it becomes possible to recognize shapes and characters.

In the present embodiment, the respective surface roughnesses R ₀ , R ₁ and R ₂ satisfy the formula (1a), and the difference between at least one of R ₁ and R ₂ and R ₀ is 0.4 nm or more. It is preferable that either one of |R ₀ -R ₁ |>0.4 nm and |R ₀ -R ₂ |>0.4 nm is satisfied, or both of them may be satisfied.

In the present embodiment, the surface roughness is preferably R ₂ >R ₀ >R ₁ . Since the amount of light reflection differs in each region and the amount of light reflection decreases in the additional region A ₂ , the observer is given a different impression about the additional region A ₂ and the reference region A ₀ . This allows the observer to recognize the additional area A ₂ as the character “A”. On the other hand, since the surface roughness is R ₀ >R ₁ and the amount of light reflection is large in the additional area A ₁ , the observer is given different impressions regarding the additional area A ₁ and the reference area A ₀ . Thereby, the observer can recognize the additional area A ₁ as the figure “rectangular row”.

When this is imaged by a camera, for example, by binarizing the received light amount, a threshold value is set between the received light amount of each of the region A ₁ having a large reflected light amount, the region A _{0 having} a small reflected light amount, and the region A ₂ . 5(c) can be imaged. The figure “rectangular row” formed by the area A ₁ is made to function as a “bar code” by which an image is picked up and the device is made to recognize the object. From the above, the observer recognizes the character and the device recognizes the bar code, so that the double check can be performed and the mistake can be prevented. In order to create such a print area 3, it is preferable that k=2.
[Modification]

The present invention is not limited to each of the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.
As the transparent plate in the present invention, those made of various shapes and materials can be used depending on the application. The shape may be, for example, not only a base material having only a flat surface, but also a curved base material having an entire curvature or a base material having a bent portion in part. Since a base material having such a bent portion has a bent portion, it is difficult to perform alignment on the base material itself, and by providing the printing region 3 of the present invention, it can be used as a reference for alignment, which is particularly useful. Further, the base material is not limited to the plate-shaped base material, and may be a film-shaped base material. As the material, any transparent glass may be used, and general glass, for example, inorganic glass, organic glass such as polycarbonate or acrylic, or other synthetic resin may be used. The inorganic glass may be chemically strengthened or physically strengthened. When using inorganic glass, the thickness is preferably 0.5 to 5 mm. This is because the inorganic glass has high strength and also has a good texture, and thus there is an advantage that a transparent plate with a printing layer having both high strength and good texture can be obtained. 0.7-3 mm is more preferable, and 0.7-2 mm is still more preferable. Further, the organic glass, the synthetic resin, and the like may be the same or different kinds of laminated base materials, and various adhesive layers may be inserted therebetween.

  The transparent plate of the present invention has a treatment layer such as an antiglare treatment (AG treatment), an antireflection treatment (AR treatment), and an anti-fingerprint treatment (AFP treatment) on the front surface and/or back surface thereof. Good. In order to improve the adhesion with the printed area, a primer treatment, an etching treatment, or the like may be performed. A film-shaped transparent plate provided with a printing region may be used in combination with another transparent plate.

  The printing area in the present invention may be formed by various printing methods and inks (printing materials) depending on the application. As a printing method, for example, spray printing or screen printing is used. By these methods, it is possible to print well even on a transparent plate having a large area. Particularly in spray printing, it is easy to print on a transparent plate having a bent portion, and it is easy to adjust the surface roughness of the printed surface. On the other hand, in screen printing, it is easy to form a desired print pattern on a wide transparent plate so that the average thickness is uniform.

  A plurality of inks may be used, but the same ink is preferable from the viewpoint of the adhesiveness of the printing layer. Further, the transparent plate with a printing layer in which a printing region is formed with the same ink is particularly suitable as a cover glass for a vehicle-mounted display device or a cover glass for a panel display. In the design of passenger cars and the like, the display device is also designed to be suitable for each, and it is necessary to produce various types of transparent plates with a printing layer according to their specifications. In addition, for cover glasses for panel displays and the like, it is required to produce a large number of various types of transparent plates with relatively small printed layers. The transparent plate with a printing layer of the present invention is suitable for efficiently and inexpensively preparing a transparent plate with a printing layer of various types, and for efficiently and surely assembling a transparent plate with a printing layer of various types. ..

The ink forming the printed area in the present invention may be an inorganic type or an organic type. Examples of the inorganic ink include, for example, one or more selected from SiO ₂ , ZnO, B ₂ O ₃ , Bi ₂ O ₃ , Li ₂ O, Na ₂ O, and K ₂ O, CuO, Al ₂ O. _The composition may be composed of one or more selected from ₃ , ZrO ₂ , SnO ₂ , and CeO ₂ , Fe ₂ O ₃ , and TiO ₂ .

  As the organic ink, various printing materials in which a resin is dissolved in a solvent can be used. For example, as the resin, acrylic resin, urethane resin, epoxy resin, polyester resin, polyamide resin, vinyl acetate resin, phenol resin, olefin, ethylene-vinyl acetate copolymer resin, polyvinyl acetal resin, natural rubber, styrene-butadiene copolymer resin At least one kind may be selected and used from the group consisting of resins such as coalesce, acrylonitrile-butadiene copolymer, polyester polyol, and polyether polyurethane polyale.

  As the solvent, water, alcohols, esters, ketones, aromatic hydrocarbon solvents, and aliphatic hydrocarbon solvents may be used. For example, isopropyl alcohol, methanol, ethanol, or the like can be used as the alcohol, ethyl acetate can be used as the ester, and methyl ethyl ketone can be used as the ketone. Further, toluene, xylene, Solvesso 100, Solvesso 150 and the like can be used as the aromatic hydrocarbon solvent, and hexane and the like can be used as the aliphatic hydrocarbon solvent. Note that these are given as examples, and various other printing materials can be used. The organic printing material is applied to a transparent plate, and then a solvent is evaporated to form a resin layer to form a printing area.

  The ink used in the print area may include a colorant. As the colorant, for example, a black colorant such as carbon black can be used when the print area is black. In addition, a colorant having an appropriate color can be used depending on a desired color.

  The transparent plate with a printing layer of the present invention can be used for a transparent member such as a panel display such as a liquid crystal display, a cover glass for a mobile device such as a smartphone, or a cover glass for an in-vehicle display device. When assembling these devices, it is necessary for an operator or the like to determine the orientation and type of the transparent plate with the printed layer. The printed layer in the transparent plate with a printed layer of the present invention can display a pattern or the like which can be recognized only by an operator at the time of assembling a product and cannot be recognized by a product user after assembling.

  Next, a method for manufacturing a transparent plate with a printed layer according to the embodiment of the present invention will be described with reference to FIGS. 6(a) to 6(c). In FIGS. 6A to 6C, the same components as those described so far are designated by the same reference numerals, and the description thereof will be omitted or simplified.

FIG. 6A is an example of a process of forming the print area 3 by printing the additional area A ₁ on the back surface of the transparent plate 2. In the printing process, the additional area A ₁ is printed on a desired portion of the transparent plate 2. At that time, printing is performed so as not to be printed at a portion where the punched pattern 32 such as a punched character or a logo mark is formed.

  Various printing methods may be used for printing, but for example, screen printing may be performed. Screen printing is printing using holes, and it is possible to print on any object that has a slight bend, regardless of what is to be printed, so it is suitable for printing on the transparent plate 2. Can be used.

FIG. 6B is an example of a step of further printing on the transparent plate 2 having the print area 3 on which the additional area A ₁ is printed to form the reference area A ₀ . In the printing process, the reference area A ₀ is deposited at a desired position on the additional area A ₁ of the printing area 3. At that time, the non-printed positions are aligned with the places where the punched patterns 32 such as blank characters and logo marks are formed, and printing is performed so that they are not printed in the same manner. Further, when the observer wants to be able to visually recognize the additional area A ₁ of the printing area 3 when observing the printing area 3 from the back surface 6 of the transparent plate with the printing layer, the additional area A ₁ is not printed in the printing step on the additional area Print in this way. As a result, the figure shown in FIG. 3 and the bar code shown in FIG. 5 can be formed.

FIG. 6C is an example of a step of forming the print area 3 by further printing by depositing the additional area A ₂ on the transparent plate 2 on which the reference area A ₀ is printed. In the printing process, printing is performed so that the additional area A ₂ is obtained at a desired position on the reference area A ₀ of the printing area 3. At that time, printing is carried out by aligning the non-printed positions with the spots where the punched patterns 32 such as blank characters and logo marks are formed so as not to be printed in the same manner. As a result, the characters shown in FIG. 2 and the characters shown in FIG. 5 can be formed.

  As the ink used for printing, a different ink (printing material) may be used for forming each area. For example, when an observer wants the printed area 3 to appear white when the transparent plate 1 with a printing layer is observed from the front surface through the transparent plate 2, white printing is performed, and black printing is performed thereon. Print to desired thickness. As a result, when assembling a display device or the like using the transparent plate with the printing layer, it becomes possible to recognize a character pattern or the like that an operator can recognize. On the other hand, the observer of the product can recognize the print area as “white” and prevent the inside of the print area from being seen through.

  A drying step or a sintering step may be carried out at the end or in the middle of the printing step, and the timing and temperature conditions for carrying out these steps can be appropriately selected according to the characteristics of the ink used.

  Next, a method for manufacturing the transparent plate with a printed layer according to the embodiment of the present invention will be described with reference to FIGS. In FIGS. 7A to 7C, the same components as those described above are designated by the same reference numerals, and the description thereof will be omitted or simplified.

  FIG. 7A shows an example of a structure in which the transparent plate 1 with a printed layer produced as described above is arranged in a frame 9. The frame 9 may be fixed to the transparent plate 1 with the printed layer by using an adhesive layer or the like, or the transparent plate 1 with the printed layer may be sandwiched and fixed by the frame 9 composed of two kinds of structures. It is not particularly limited. The shape and material of the frame are not particularly limited, and can be appropriately designed, selected and used.

  FIG. 7B is an example of a structure in which an adhesive layer 10 is attached to the structure of the transparent plate 1 with a printed layer and the frame 9 obtained in FIG. 7A. The shape and size of the adhesive layer 10 are preferably such that they fit into the non-printing area 4 of the transparent plate 1 with a printing layer, but the shape and size are not particularly limited.

The adhesive layer 10 is transparent like the transparent plate 2, and the difference in refractive index between the transparent plate 2 and the adhesive layer 10 is preferably small.
Examples of the adhesive layer 10 include a layer made of a transparent resin obtained by curing a liquid curable resin composition. Examples of the curable resin composition include a photocurable resin composition and a thermosetting resin composition. Among them, a photocurable resin composition containing a curable compound and a photopolymerization initiator is preferable. The curable resin composition is applied by using a method such as a die coater or a roll coater to form a curable resin composition film.
The adhesive layer 10 may be an OCA film (OCA tape). In this case, the OCA film is laminated on the non-printing area 4 of the transparent plate 1 with the printing layer.

  The thickness of the adhesive layer 10 is, for example, 5 to 400 μm, preferably 50 to 200 μm. The storage shear elastic modulus of the adhesive layer 10 is, for example, 5 kPa to 5 MPa, preferably 1 MPa to 5 MPa.

  FIG. 7C is an example of a structure in which the liquid crystal module 8 is attached to the adhesive layer 10 of the structure obtained in FIG. 7B. As described above, the display device 11 including the transparent plate 1 with a printed layer according to the present invention can be manufactured.

  When manufacturing the display device 11 of the present invention, the assembly order is not particularly limited. For example, a structure in which the adhesive layer 10 is arranged on the transparent plate 1 with a printed layer may be prepared in advance, arranged on the frame 9, and then the liquid crystal module 8 may be attached.

  Further, in addition to the above configuration, a touch sensor or the like may be provided. When a touch sensor is incorporated, the touch sensor is arranged in the non-printing area 4 of the transparent plate 1 with a printing layer via the adhesive layer 10, and the liquid crystal module 8 is arranged in the non-printing area 4 via the adhesive layer 10.

  As the transparent plate 2, a plate-like glass (Dragon Trail (registered trademark), manufactured by Asahi Glass Co., Ltd.) having a rectangular main surface with a thickness of 2 mm is used as the transparent plate 2, and the glass plate is chemically strengthened by the following procedure. A glass plate with a printed layer was obtained.

A printing layer was formed on the outer peripheral edge of one main surface of the glass plate by printing in the shape of a black frame having a width of 2 cm. First, a black ink (trade name: GLSHF, manufactured by Teikoku Ink Co., Ltd.) was applied to a thickness of 5 μm by a screen printing machine, and then was held at 150° C. for 30 minutes to be dried (hereinafter referred to as the first layer).
Subsequently, screen printing was performed using the same black ink using a screen plate processed so that desired characters and figures could be obtained (hereinafter referred to as the second layer). In printing the second layer, a screen plate was used which was treated so that ink would not penetrate to the places where characters or figures were desired. The second layer was also printed on the first layer with a thickness of 5 μm, and was then held at 150° C. for 30 minutes to be dried. At this time, the surface roughness of the second layer was changed by changing the conditions such as the printing speed and the size of the screen plate mesh from those of the first layer.

FIG. 8 shows an example of characters created in this example. The character "9000" can be recognized, the area on this character is the additional area A ₁ , and the other area is the reference area A ₀ . In this embodiment, the additional area A ₁ is thinner than the reference area A ₀ , and irregularities are formed due to the difference in thickness. Since the unevenness is irradiated with light or the like to give contrast, the shape or the like can be visually recognized and “9000” can be recognized. The character "9000" can be recognized when viewed from one main surface provided with the printing layer, but cannot be recognized when viewed from the other main surface.

  From the above, it has been found that characters and figures can be produced by a simple and inexpensive printing process.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and substitutions are made to the above-described embodiment without departing from the scope of the present invention. Be done.

  INDUSTRIAL APPLICABILITY The present invention can be used as a mark or the like when assembling a display device by forming characters or figures in the print area.

1 Transparent Plate with Printing Layer 2 Transparent Plate 3 Printing Area 31 Alignment Mark 32 Punching Pattern 4 Non-Printing Area 5 Front Surface 6 Back Surface 7 Edge Surface 8 Liquid Crystal Module 9 Frame 10 Adhesive Layer 11 Display Device

Claims (12)

A transparent plate having a front surface, a back surface, and an end surface, and a printing layer-provided transparent plate having a printing layer provided on a part of the back surface of the transparent plate,
The printing layer forms a printing area in a front view from the back surface, and the printing area has a reference area A ₀ having a thickness t ₀ from the back surface and a thickness from the back surface. and additional area _{a kL} with t _kL, a three region between the additional area _{a kS} having a thickness _{t kS} from the back surface,
The thickness t _kL is thicker than the thickness t ₀ , the thickness t _kS is thinner than the thickness t ₀ ,
The difference between the arithmetic average roughness of at least one of the additional region A _kL and the additional region A _kS and the arithmetic average roughness of the reference region A ₀ is 0.4 nm or more,
Wherein an arithmetic mean roughness _{R kL} of additional area _{A kL,} and an arithmetic mean roughness _{R kS} of the additional area _{A kS,} an arithmetic mean roughness _{R 0} of the reference area _{A 0 is, R} kS _<R 0 _<R A transparent plate with a printed layer, which satisfies _kL . Wherein the area _{S 0} of the reference area _{A 0,} the printing layer with a transparent plate according to claim 1, wherein the additional area _{A kL} and the sum [sigma] s _k of the area _{S k} of the additional area _{A kS} satisfies the equation (1).
S ₀ /(S ₀ +ΣS _k )≧0.6 (1) The transparent plate with a printing layer according to claim 1 or 2 , wherein the printing region is on the periphery of the transparent plate. The transparent plate with a printing layer according to claim 3 , wherein the reference region A _{0 of the} printing region is on the periphery of the transparent plate. In a front view from the back side, a contour of a character or a figure is formed at a boundary between the non-printing area without the printing layer or the reference area A ₀ and at least one of the additional area A _kL and the additional area A _kS. print layer with a transparent plate according to any one of claims 1 to 4 which is. In a front view from the back side, the contours of characters and figures are formed at the boundaries between the non-printing area without the printing layer and the reference area A ₀ and at least one of the additional area A _kL and the additional area A _kS. print layer with a transparent plate according to any one of claims 1 to 4 which is. The transparent plate with a printing layer according to claim 5 , wherein the character or figure is an alignment mark. The transparent plate with a printing layer according to claim 7 , wherein the alignment mark is provided on a part or the whole of the printing region formed on the peripheral edge of the transparent plate along the outer periphery of the non-printing region. Print layer with a transparent plate according to any one of the transparent plate according to claim 1-8 which is made of glass. The printing area, the printing layer with a transparent plate according to any one of claims 1 to 9 made of the same printing material. Display device for a cover provided with a printed layer with a transparent plate according to any one of claims 1-10. Laminating the printed layer with a transparent plate, comprising: a frame for supporting the printed layer with a transparent plate, a liquid crystal module, and the said printed layer with a transparent plate liquid crystal module to any one of claims 1-10 A display device comprising an adhesive layer.

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