JP2011194799A - Bezel decoration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bezel decoration which can improve designability, physical strength and chemical resistance.SOLUTION: In a bezel decoration 10 for portable digital equipment, the bezel decoration has a laminated structure of a decorative pattern layer 17, in which a picture frame pattern 11 has a pattern such as a design or pictorial pattern formed of a coloring material with high transparency and heat resistance, and a back holding layer 18 having a pattern formed of a material with high concealable nature and metallic luster, or a matte coloring material. The bezel decoration includes a transparent cover layer 26 which covers the picture frame pattern 11, other concomitant pattern, and the above two layers.

Description

  The present invention relates to decoration on a frame part of a display screen of a portable digital device such as a mobile phone, and particularly relates to a bezel decoration on a frame part.

In general, a portable digital device includes a display screen unit, operation button units such as number keys, a speaker, a microphone, a camera, and the like, and each member is disposed in each part of the casing in the design of the portable digital device.
Here, the bezel is a frame pattern of a display screen of a portable digital device such as a cellular phone and all patterns having a design and a function associated therewith.

There is no pattern on the display screen that hinders visibility, but the surrounding frame part has a frame pattern, as well as a company logo, product name, camera lens opening window, and infrared communication depending on the design of the mobile digital device. An opening window or the like is formed.
As the design of portable digital devices, the display screen unit and the operation button unit are arranged in separate housing parts and two housing parts are combined, or the display screen unit and the operation button unit are arranged on the same housing. There are many things.

A molded product of plastic or metal material is used for the casing portion other than the display screen portion. The parts of the operation buttons are also made of members that are decorated according to the color and design of the casing.
As a method of decorating the casing parts, direct decoration on the molded casing, direct printing, transfer printing, foil stamping, painting, hydraulic transfer, etc. There are mold molding and insert molding in which a film material with a pattern is integrally molded with a molding resin. In addition, as another method, a method of providing a three-dimensional unevenness on the molded product is used (see Patent Document 1).

Patterns used for decoration include metallic glossy tone, pearly glossy tone, gradation, patterns such as abstract paintings and photographs, formation of metallic glossy layers by plating, interference films and glossy layers by vacuum deposition method Those with high design properties such as formation are used.
Display members such as a liquid crystal panel and an organic EL panel are disposed inside the display screen section.

A display member such as a liquid crystal panel or an organic EL panel has a structure in which an electric circuit or a display element is formed on a glass substrate, and is easily damaged by an external physical force or contact with a chemical substance. For this reason, the display screen unit has a structure in which the display member is sealed and protected inside the housing.
At this time, a front plate made of a highly transparent plastic substrate that does not physically break and does not impair the visibility of the display screen is disposed on the outermost surface.

In addition to the purpose of protecting display members such as liquid crystal panels and organic EL panels, the front plate is used to hide the semiconductor drive elements located on the outer periphery of the display member and to add design to portable digital devices. A bezel decoration including a pattern is formed.
As a decorating method for the front plate, a method of directly forming a decorating pattern on the front plate or a method of bonding a film base material on which the decorating pattern is formed in a separate process is taken.
Further, a glass substrate having higher transparency than a plastic substrate has been used as a front plate.

  Recently, a design has been adopted in which a touch panel is arranged between the display member and the front plate, the functions of the operation buttons are integrated on the screen, and the display screen is arranged largely.

  The touch panel detects a touched position by touching the screen with a finger instead of an operation button. As a mechanism for detecting the position touched by the finger, a pressure-sensitive type that detects a deformed part when pressed by the finger and a change when the current flows through the touched finger by passing a weak current through the screen surface are detected. The “electrostatic type (capacitance type)” is known (see Patent Document 2).

Conventionally, a black frame that matches the black frame of the light-shielding pattern of the liquid crystal panel or the organic EL panel itself has been used for the frame pattern of the bezel portion.
However, the display screen has become larger, the bezel has been regarded as one of the designs of the mobile digital device itself, and the bezel has also been required to be decorated.

JP 2003-71884 A JP 2005-173970 A

The bezel decoration has a configuration in which the front plate is decorated and a configuration in which the film material is decorated and bonded to the front plate.
Moreover, when laminating | stacking a touch panel member, the structure laminated | stacked on the display board which consists of a front plate which gave the said decoration, and a liquid crystal panel or an organic electroluminescent panel is taken.
Screen printing is used to decorate the bezel, changing the printing ink according to the design and required functions such as frame pattern, company name logo, product name, camera lens opening window, infrared communication opening window, etc. It is manufactured by overprinting.

Screen inks are colored by dispersing color pigments, metal particles such as aluminum, and pearl pigments in the medium. In screen printing, functional colors such as process colors, special colors, pearl, metallic, and mirror can be expressed.
On the other hand, the color metallic luster with a high mirror feeling uses a color pigment dispersed in the mirror ink. However, the color pigment dispersion hinders the alignment of the metal particles, resulting in a problem that the mirror feeling is lowered. .

In addition, the gradation expression without tone jump is limited in the minimum opening diameter that can be resolved by the screen plate, or the transfer amount is lowered at the boundary of the gradation pattern due to the amount of ink that can pass through the opening due to the small opening diameter. The problem is limited to rough pattern expression.
Moreover, the structure which forms a touch-panel element on the bezel decorations formed on the glass substrate is considered. In forming the touch panel element, it will pass through the vacuum film formation process, wet patterning process, and high temperature curing process, and the heat resistance of the bezel decoration layer and the countermeasures against deposits from the bezel decoration to the touch panel is necessary.

  The present invention has been made in view of the circumstances as described above, and is intended to provide a decorative product having high designability and high chemical and physical resistance in a bezel decoration of a portable digital device. To do.

In order to solve the above problems, the invention described in claim 1 of the present invention is a bezel decoration on a display screen of a portable digital device.
It has a laminated structure of a decorative pattern layer on the surface side and a back presser layer formed on the back side of the decorative pattern layer,
The decorative pattern layer is composed of a highly transparent color material pattern that allows the back presser layer to be visually recognized, and the back presser layer is composed of a color material pattern that is more concealed than the decorative pattern layer. Thus, the design is expressed by a color mixture of the decorative pattern layer and the back pressing layer.

Next, the invention described in claim 2 is different from the structure described in claim 1 in that the color material having high transparency of the decorative pattern layer is a negative photoresist for a color filter of a liquid crystal panel, an offset. It consists of any of printing ink, gravure printing ink, ink jet printer ink, and transfer printer ink.
Next, in the invention described in claim 3, the peak value of the spectral transmittance of the coating film of the color material having high transparency is 40% or more with respect to the configuration described in claim 1 or claim 2. It is characterized by this.

  Next, in the invention described in claim 4, in contrast to the structure described in any one of claims 1 to 3, the color material having a high concealability of the backing layer is formed by a vacuum film forming method. It consists of a single layer film of chromium, titanium, zirconium, aluminum or the like and a laminated film of each oxide, and is patterned by the photolithography method in the pattern shape of the bezel decoration.

Next, the invention described in claim 5 is the structure described in any one of claims 1 to 3, wherein the colorant having high concealment property of the backing layer includes particles having metallic luster. It consists of a dispersed metallic glossy ink and is printed in the pattern shape of the bezel decoration.
Next, the invention described in claim 6 is directed to the configuration described in any one of claims 1 to 5, wherein the bezel decoration is applied to a film substrate, a plastic substrate, a glass substrate, or the like. It is formed on a decorative substrate.

  Next, the invention described in claim 7 is a transparent coating layer made of an organic resin or an inorganic film on the decorative pattern layer with respect to the configuration described in any one of claims 1 to 6. Is characterized by being laminated.

  According to the present invention, in a bezel decoration for a portable digital device, a decorative pattern layer made of a color material having high transparency and heat resistance and a back pressing layer made of a color material having high concealability are formed to overlap. As a result, it is possible to obtain a decorative product having high design expression and high chemical and physical resistance.

It is explanatory drawing of the bezel decorations which concern on embodiment based on this invention, (a) is a top view, (b) is a side view. It is explanatory drawing of the taper angle of a frame part, and a film thickness level | step difference. It is a typical side view explaining the composition of the bezel decorations concerning the embodiment based on the present invention. It is a side view of the decomposition | disassembly state which shows the structural example of mounting of the bezel decorations, front plate, display element, and touch panel which concern on embodiment based on this invention. It is a side view of the decomposition | disassembly state which shows the structural example of mounting of the bezel decorations, front plate, display element, and touch panel which concern on embodiment based on this invention. FIG. 3 is a diagram showing a manufacturing process of Example 1. It is explanatory drawing of the pattern arrangement | positioning in a to-be-decorated board | substrate. 6 is a diagram illustrating manufacturing steps of Example 2. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the bezel decoration 10 is provided on a decorated substrate 16 such as a film base, a plastic substrate, or a glass substrate. The bezel decorative object 10 of the present embodiment is a laminate of a decorative pattern layer 17 made of a highly transparent color material pattern and a backing layer 18 formed on the upper side and made of a highly concealed color material pattern. It has a structure. In addition, a transparent coating layer having a function desired to be imparted when mounted on a portable digital device may be laminated so as to cover the decorative pattern layer 17.

The transmittance of the color material with high transparency of the decorative pattern layer 17 is 40% or more, preferably 60% or more.
The backing layer 18 uses printing ink having a metallic luster. At this time, a printing ink having a high reflection luminance with a metal particle diameter of about 10 μm to 60 μm may be used.
What is necessary is just to set the total film thickness of the decoration pattern layer 17 and the back pressing layer 18 to 20 micrometers or less. In addition, as shown in FIG. 2, when the front plate, the display element, and the touch panel element are bonded, it is desirable that the amount of protrusion (step) from the decorated substrate 16 is small. The upper limit value of the film thickness was 20 μm.

  Further, in order to cover the entire surface of the frame pattern 11 and the decorated substrate 16 with the transparent coating layer 26, it is desirable that the end portion of the frame pattern 11 has no step, and the taper angle θ of the end portion of the window frame pattern is 20 degrees. It is desirable that the pattern step at the end of the frame pattern 11 is ½ or less of the film thickness of the transparent coating layer 26 (see FIG. 2).

  As the film base material or plastic substrate of the substrate to be decorated 16, a material having high adhesion to the color material having high transparency of the decorative pattern layer 17 and the color material having high concealment property of the back pressing layer 18 may be selected. . Materials such as PMMA (acrylic), PET (polyethylene terephthalate), PES (polyethersulfone), PEN (polyethylene naphthalate), PC (polycarbonate), PP (polypropylene) can be used.

  As the glass substrate, non-alkali glass or soda glass, which is used for liquid crystal panels and organic EL panels, can be used.

FIG. 3 shows an example of the bezel decoration 10.
FIG. 3A shows an example of a configuration in which a photoresist is used for the decorative pattern layer 17 and a vacuum-formed metal thin film is used for the backing layer 18. FIG. 3B shows an example of a configuration in which a pattern by offset printing is used for the decorative pattern layer 17 and a pattern by screen printing is used for the back pressing layer 18.

FIG. 3C is an example in which a photoresist is used for the decorative pattern layer 17 and a vacuum-formed metal thin film is used for the backing layer 18. Furthermore, it is an example of the structure which coated organic resin as the transparent coating layer 26. FIG. FIG. 3D shows an example in which a pattern by offset printing is used for the decorative pattern layer 17 and a pattern by screen printing is used for the back pressing layer 18. Further, as the transparent coating layer 26, an SiO _x film is formed by vacuum forming.

The negative photoresist and printing ink of this embodiment are color materials in which an organic resin, a pigment, a filler, a curing initiator and a curing component, an additive for imparting functionality, a dilution solvent, and the like are mixed.
Examples of the organic resin include polyester resins, acrylic resins, epoxy resins, melamine resins, benzoguanamine resins, and urethane resins.

  Examples of such resins include polyester, polystyrene, phenol resin, xylene resin, epoxy resin, polycarbonate, aromatic nylon resin, or a copolymer containing styrene, aromatic acid, phenol, etc., acrylic resin, melamine resin, benzoguanamine resin. Can be raised.

Especially, what combined any one or more of a polyester resin, an acrylic resin, or an epoxy resin, and any one or more of a melamine resin or a benzoguanamine resin is preferable. Furthermore, a combination of a polyester resin and a melamine resin and a combination of an epoxy resin, a melamine resin, and a benzoguanamine resin are more preferable.
The curing component may be selected from those in which a photocuring component, a thermosetting component or both are dispersed.

Next, a description will be given of the configuration of the bezel decoration 10, the front panel 31, the display element, and the touch panel 33 according to this embodiment. As shown in FIG. 4, the bezel decoration 10 is formed on the back surface of the substrate 16 to be decorated. Alternatively, the front panel 31 may be bonded with the adhesive film 32, and the touch panel 33 and the display panel 34 may be mounted thereon. Or as shown in FIG. 5, it is good also as a structure which forms the bezel decoration 10 in the back surface of the front plate 31, and mounts the touchscreen 33 and the display panel 34 in it.

  That is, when mounting the bezel decoration 10 of this embodiment, the front plate 31, and a display member such as a liquid crystal panel or an organic EL panel on a portable digital device, the bezel decoration 10 of the substrate to be decorated 16 is mounted. There can be a configuration in which the surface on which the surface is formed is mounted on the back surface forming side with respect to the front plate 31 or a configuration mounted on the front surface forming side.

  The order in which the decorative pattern layer 17, the back pressing layer 18 and the transparent coating layer 26 are formed with respect to the decorated substrate 16 depends on whether the decorated substrate 16 is mounted on the back surface or the front surface. In addition, the decorative pattern layer 17 may be formed so as to be visible on the outermost surface from the viewing side. FIG. 1B shows an example in which the bezel decoration 10 is formed on the back side of the substrate to be decorated 16.

The color of the bezel decoration 10 is slightly shifted due to the history of heat treatment after the formation. When setting the color of each color material of the decorative pattern layer 17 and the back pressing layer 18, the color after the heat history until mounting as a laminate of the display screen matches the color determined by the design. Should be designed as follows.
And the bezel decoration 10 of this embodiment can aim at the improvement of the designability, and the improvement of chemical strength.

  In addition, the bezel decorations 10 in this embodiment are all the decorations arrange | positioned at the window frame of a display screen.

Further, this embodiment will be described in detail.
The bezel decoration object 10 of this embodiment consists of a laminated structure of the decoration pattern layer 17 and the back pressing layer 18, and forms a color and a pattern in the decoration pattern layer 17 with a highly transparent color material. As a result, it is possible to make an expression that adds to the reflected color from the coating film of the backing layer 18.

As the colorant having high concealability for the back-pressing layer 18, a colorant containing a metal material and having a metallic luster, or a colorant such as white, gray or black without metal particles can be used.
The decorative pattern layer 17 can also form a pattern by using the color material having high transparency and a color material having high concealment together. The pattern portion formed of the color material having high concealment is a back-pressing layer. It is possible to express a design that is not affected by the reflection colors of the 18 colorants.

  Further, as the bezel decoration 10, as shown in FIG. 1A, in addition to the window frame, the company name logo 15 and the product name 14, the opening 12 of the camera, etc., and the hidden window of the opening 13 of the infrared transmission / reception unit. There are departments. These decorative portions are formed by forming corresponding portions of the decorative pattern layer 17 and the back pressing layer 18 in a blank pattern and pressing the functional ink in each opening by screen printing. Is possible.

The company logo 15 and the product name 14 use a design such as white with a metallic luster tone or high concealment, and a screen of a color corresponding to the cut pattern portion of the decorative pattern layer 17 or the back pressing layer 18. It can be formed by press printing with ink.
In addition, the back-pressing layer 18 is formed by using a color material having a metallic luster corresponding to the company name logo 15 or product name 14 or a color material having high concealment, such as white color having high concealment, so that only the decorative pattern layer 17 is formed. In addition, it is possible to show the color of the backing layer 18 from the punched pattern portion.

  Further, the color material having high transparency of the decorative pattern layer 17 is a negative photoresist for a color filter of a liquid crystal panel, or offset printing ink, gravure printing ink, ink jet printer ink, transfer printer ink. And is patterned into the pattern shape of the bezel decoration 10.

  A negative resist for a color filter of a liquid crystal panel is usually composed of red, green, blue, black, and transparent colors. The purpose of the color filter is to transmit light and display in color, so Red, Green, Blue, and transparent resists have a range depending on the color pigment concentration and pigment particle diameter, but generally have a peak spectral transmittance. The film state is designed to be 50 to 95%, and a highly transparent coating film can be obtained.

On the other hand, since the Black resist functions as a light shielding film, a very high concealing property can be obtained with a formed film thickness of OD value of 3 or more and about 2 μm.
Any resist can be photopolymerized by photocuring, and unnecessary portions can be dissolved and removed by a photolithography method, and a desired pattern can be obtained. A pattern from a dot pattern of about 10 μmΦ to a solid film can be formed by designing the photomask, and an arbitrary pattern such as a gradation or a picture can be formed according to the pattern formed on the photomask.

Further, the error in pattern position accuracy can be controlled to 50 μm or less with respect to the design of the photomask by temperature control during the process.
As a method of design expression of the decorative pattern layer 17, a decorative pattern layer 17 that combines a color metallic glossy tone and a non-metallic glossy tone by using a pattern of Red, Green, Blue resist and a Black pattern together. It is possible to form.

Further, as colors used for the decoration pattern, it is possible to adjust colors other than the three primary colors by blending Red, Green, and Blue resist in the same manner as the printing ink.
The decorative pattern formed of a photoresist becomes a strong film by thermosetting, and a film having high chemical resistance, high light resistance, and high heat resistance is obtained. In addition, it is a material characterized by low ion contamination and outgas in the liquid crystal panel, and it is possible to obtain a decorative pattern with high chemical resistance.

  There are many colors for offset printing and gravure printing, including process inks made of CMYK, special color inks by toning, and functional inks such as inks with dispersed metal particles and transparent inks. is there. As the ink curing method, there are a UV curing method and a heat curing method, both of which can be used. However, when the decorated substrate 16 is a non-permeable material, a UV curable ink is desirable.

The printed film thickness obtained by offset printing or gravure printing is as thin as around 2 μmt, and a printed matter having high transparency can be obtained except for dark and dark colors.
In addition, it is possible to increase the color density and to improve the concealment by printing the same color in an overlapping manner.
In offset printing, a pattern is formed by changing the size of a dot diameter, and a pattern is obtained by receiving ink on a parent ink portion on a printing plate with a blanket and transferring it to a substrate to be decorated.

It is possible to adjust the printing film thickness and the minimum dot diameter obtained by printing by optimizing the ink affinity between the printing ink, printing plate and blanket, and gradation and design faithful to the pattern formed on the printing plate. Can be formed.
In gravure printing, a pattern is formed by changing the size of the dot diameter, and the pattern is obtained by transferring the ink filled in the recesses on the printing plate to the substrate to be decorated.

It is possible to adjust the printing film thickness and the minimum dot diameter obtained by printing by optimizing the ink affinity between the printing ink, the printing plate, and the substrate to be printed, and gradation that is faithful to the pattern formed on the printing plate It is possible to form printed materials such as patterns.
The ink jet printer forms a pattern by superimposing dots of about 50 μmΦ, and a pattern can be obtained by directly drawing on a decorated substrate based on digital image data. It is possible to print different patterns one by one without the need to use a printing plate, and it is possible to repeatedly print the same pattern with uniform quality by machine control.

Ink for inkjet printers includes UV curable ink, solvent-based ink, and water-soluble ink. Although the kind of ink is not particularly defined, an ink that can be adhered to the substrate to be decorated according to this embodiment may be used.
Thermal transfer printers include a melt transfer printer and a sublimation transfer printer depending on the transfer method. By transferring the color material coated on the ink ribbon to the transfer sheet based on the digital image data to form the primary pattern, the pattern is printed on the decorated substrate 16 from the transfer sheet. A pattern can be obtained. The dot diameter that represents the pattern varies depending on the type of the printer head, and there are a dot expression of about 50 μmΦ and a gradation output.

It is possible to print different patterns one by one without the need to use a printing plate, and it is possible to repeatedly print the same pattern with uniform quality by machine control.
In the printing method using gradation output, smooth gradation expression without tone jump is possible in gradation expression.
In addition, as a method for expressing the design of the decorative pattern layer 17, a decorative pattern combining a color metallic glossy portion and a nonmetallic glossy portion by using a highly transparent ink and a dark or dark color ink in combination. Layer 17 can be formed.

The color coloring material is a photoresist, an ink for offset printing, an ink for gravure printing, an ink for an ink jet printer, and an ink for a transfer printer, all of which are colored by dispersing a color pigment in a transparent resin. .
The spectral transmittance is changed by adjusting the particle diameter and the addition amount of the pigment, and the concealing property of the color material is increased and the spectral transmittance is decreased by adjusting the particle diameter of the pigment and increasing the addition amount. Conversely, adjustments such as reducing the particle size of the pigment and increasing the amount of addition make the color lighter and the spectral transmittance increases.

The color peak position changes depending on the color. For example, Blue has a peak position near 440 nm, Green has a peak position near 530 nm, and Red has a peak position near 610 nm.
In order for the color material to transmit the reflected light from the backing layer 18 and develop a color, the spectral coating has a spectral transmittance peak value of 40% or more, preferably 60% or more.
The spectral reflectance of the color material having a metallic luster of the back-pressing layer 18 varies depending on conditions such as the matte, gloss, and mirror state of the coating such as diffuse reflection and regular reflection. The ink is reduced to 60 to 80% compared to the reflectance of the aluminum single layer film.

If the spectral transmittance of the coating film of the color coloring material is less than 40%, the total reflectance decreases to about 30% when multiplied by the loss of reflectance from the coloring material having the metallic luster of the backing layer 18. Due to the concealment, a color metallic glossy design cannot be obtained.
When the spectral transmittance of the color material is in the range of 40 to 60%, it is a region that changes from concealing property to transparency, and designs from color metallic luster to weak metallic luster are possible.

When the spectral transmittance of the color material is 60% or more, the transparency is high, but the color density is lowered, and a color metallic luster design in which the color changes from dark to light is possible.
Further, a color material having a metallic luster can be used as the color material having a high concealment property for the backing layer 18.
As a coloring material having metallic luster, a metal single layer film such as chromium, titanium, zirconium, and aluminum capable of vacuum film formation, a metal film from the decorative pattern layer 17 side, and a laminated film formed with each oxide are formed. It can be used.

As a method for forming the metal thin film, sputtering film formation or vapor deposition film formation using a vacuum film formation method can be used.
The thickness of the formed film is not particularly defined, but is preferably 2000 mm or more so that concealability is obtained.
As a photolithographic method for patterning the formed metal thin film into the pattern shape of the bezel ornament 10, a photoresist is coated on the metal thin film, exposed and developed, and the resist covering the pattern portion of the bezel ornament 10 is coated. A method of removing the resist pattern after forming a pattern and etching with a chemical solution that dissolves the metal film is possible.

Further, before forming the metal thin film, a resist pattern in which the pattern portion of the bezel decoration 10 is opened with a photoresist is formed, and after the film formation, the resist pattern is peeled off and the metal thin film thereon is lifted off. Thus, it is possible to pattern the metal thin film which is difficult to etch.
Further, a color material having a metallic luster can be used as the color material having a high concealment property for the backing layer 18.

The above-described pattern shape of the bezel decoration 10 is obtained by printing using a metallic gloss ink in which particles having metallic gloss are dispersed as a coloring material having metallic gloss.
As particles having metallic luster, metal particles such as aluminum, silver, gold, and titanium and optical interference particles such as pearl can be used.
As the printing method, offset printing, screen printing, flexographic printing, reversal printing, and the like can be used, and by overprinting with reference to the alignment marks 19 and 110 formed by the decorative pattern layer 17 (see FIG. 7), The bezel decoration 10 with high stacking accuracy can be obtained.

Moreover, a film base material, a plastic substrate, a glass substrate, etc. can be used as the to-be-decorated board | substrate 16 which forms the said bezel decorating thing 10. FIG.
A film substrate having roll supply or sheet supply can be used for manufacturing the bezel decoration 10. All the processing methods of the present invention can be applied to a roll-fed film substrate.
All processing methods other than the gravure printing method among the processing methods of the present invention can be applied to the film substrate, the plastic substrate, and the glass substrate supplied as a single wafer.

Among them, when vacuum forming a film substrate supplied as a single wafer, a support is required when throwing it into the film formation apparatus, or it is difficult to clean and dry the substrate in the wet process after film formation. The film substrate is preferably roll-fed in a process involving a vacuum forming method.
Plastic substrates and glass substrates are supplied as single wafers, and any processing method of the present invention can be implemented.
The decorated substrate 16 may be selected according to the process of the display screen portion of the portable digital device.

Examples of the mounting process include the following methods 1) to 4).
1) A construction method in which the bezel decorations 10 are bonded to the front panel 31 and overlapped with a display element such as a liquid crystal panel. 2) The decorated substrate 16 itself is used as the front panel 31 and overlapped with a display element such as a liquid crystal panel. Method of use 3) Method of using the decorated substrate 16 itself as the front plate 31 and overlapping the display element such as a liquid crystal panel and the touch panel 33 4) Using the decorated substrate 16 itself as the front plate 31 A construction method in which the touch panel 33 element is formed on the display element such as a liquid crystal panel, and the transparent covering layer 26 is formed so as to cover the decorative pattern layer 17 and the back pressing layer 18. good.

Since the transparent coating layer 26 is formed so as to uniformly cover both the frame portion and the decorative display screen, a film having a high transmittance is desirable so as not to disturb the screen display of the portable digital device. Although it does not prescribe | regulate especially as a transmittance | permeability, 90% or more is desirable.
The transparent coating layer 26 can have a function as a protective film that protects a decorative object such as the frame pattern 11 from an external physical force.

  Alternatively, when the frame pattern 11 is formed by a printing method, the total thickness is about 5 to 20 μm, and a smoothing layer that reduces the step between the frame pattern 11 and the surface of the substrate to be decorated 16 by forming the transparent film. It can have the function as. By reducing the step between the frame pattern 11 and the surface of the substrate to be decorated 16, when the decorative surface of the substrate to be decorated 16 and the front plate 31 are bonded together via an adhesive film, the difference in level is raised. An effect of preventing bubbles from entering is obtained.

In addition, when the touch panel 33 element is laminated on the decorated substrate 16 in which the window frame pattern is formed, it is deposited from the decorated substrate 16 such as a color material or a plastic substrate used for forming the window frame pattern. It is possible to provide a function as a barrier film for preventing the coming out gas or moisture from entering the touch panel 33 element.
As the material of the transparent coating layer 26, an organic resin coating film used in a color filter, or an inorganic film such as SiO _x or TiO _x formed by vacuum forming or coating can be used.

A first embodiment according to the present invention will be described with reference to FIG.
As the front plate 31, a non-alkali glass of 360 × 460 × 0.7 mmt was used. The bezel decoration 10 was directly formed on the front plate 31, and a touch panel element was further laminated. The bezel pattern was designed with multiple faces on the front plate 31.
That is, first, as shown in FIG. 6 (a), the decorative pattern layer 17 of the bezel decoration 10 was designed with a highly transparent negative photoresist used for manufacturing a color filter for a liquid crystal panel.

As for the design of the bezel decorations 10, the frame pattern was formed with a single red photoresist, and the company logo was designed with no letters.
Next, as shown in FIG. 6B, a backing layer 18 made of a Cr sputtered film is laminated on the decorative pattern layer 17 by a vacuum film forming method. Further, as shown in FIG. As shown in FIG. 3, the Cr thin film was etched, and the unnecessary photoresist was peeled off to form a Cr pattern. The frame pattern was designed in red metallic luster, and the company logo was designed in metallic luster to show the metal film on the back.

A photomask having a bezel pattern and alignment marks 19 and 110 for photolithography used in the next process is used (see FIG. 7).
Further, as shown in FIG. 6E, a transparent covering layer 26 made of a transparent resin having a high insulating property used for the overcoat layer of the color filter is laminated on the backing layer 18 made of a Cr sputtered film. Insulation with the elements of the touch panel 33 is provided. Next, as shown in FIG. 6 (f), the elements of the touch panel 33 on the bezel decoration 10 were stacked.

Again, the preparation procedure of the bezel decoration 10 is shown next.
1) A red photoresist was applied to alkali-free glass, and a decorative pattern layer 17 composed of a frame pattern 11 and alignment marks 19 and 110 for photolithography were formed by a photolithography method.
2) A Cr film was formed by sputtering.
3) A positive resist was applied on the Cr film, and the decorative pattern portion was covered with the positive resist layer by a photolithography method.
4) The Cr film exposed from the positive resist coating layer was dissolved and removed with a Cr etching solution comprising a mixture of nitric acid.
5) The positive resist coating film which became unnecessary was dissolved and removed to obtain a Cr pattern.
6) A transparent resin made of a thermosetting acrylic resin was applied to the entire surface of the substrate to prepare a decorative full surface plate.

By producing the zel ornament of the present embodiment produced as described above, it is possible to express a red metallic glossy tone with a high mirror feeling, and it is possible to obtain a highly decorative ornament.
Further, by forming the touch panel 33 on the decorative full surface board, the touch panel 33 function of stacking a chemically reliable decoration with less contamination permeation to the touch panel 33 such as outgas from the bezel decoration 10 is obtained. It was possible to obtain the front plate 31 having the same.

Next, Example 2 based on this invention is demonstrated with reference to FIG.
As the front plate 31, a 0.8 mmt transparent acrylic plate was used. The bezel decoration 10 was directly formed on the front plate 31, and a liquid crystal panel and a touch panel element were laminated and used. The bezel pattern was designed on the front plate 31 with multiple faces.
That is, as shown in FIG. 8A, the decoration pattern layer 17 of the bezel decoration 10 is designed by UV offset printing with high transparency.

The design of the bezel decoration 10 was designed with a red and black single-color part in the frame pattern and a gradation that changes in gradation from red to black.
Next, as shown in FIG. 8B, a silver screen ink in which aluminum particles are dispersed is printed on the decorative pattern layer 17 to form a backing layer 18, and the frame pattern has a red metallic gloss tone. Designed with a gradation that changes as the tone changes to black with metallic luster.

The UV offset plate used was a bezel pattern and screen printing alignment marks 19 and 110 used in the next step.
Next, as shown in FIG. 8C, the company name logo 15 and the camera lens portion were designed in a blank pattern for both the decorative pattern layer 17 and the back pressing layer 18. The company name logo-excluded pattern portion 54 and the infrared communication opening portion 13 were designed with a design that prints screen inks 54 and 57 having other functionalities on the backing layer 18.

Again, the preparation procedure of the bezel decoration 10 is shown next.
1) A decorative pattern layer 17 made of a frame pattern and alignment marks 19 and 110 for screen printing were formed on an acrylic substrate by UV offset printing.
2) Positioning was performed by screen printing alignment, and silver ink was printed in a frame pattern shape by screen printing.
3) The logo-extracted pattern 54 part of the company name was formed by a screen printing of mirror ink and showing the color from the extracted pattern of the decorative pattern layer 17 and the backing layer 18.
4) The opening for infrared communication was formed by a method of pressing the opening of the decorative pattern layer 17 by screen printing with infrared transmitting ink.
The bezel decorative object 10 of the present example was able to express a color metallic glossy gradation with good gradation expression, and a decorative object with high designability could be obtained.

"Comparative example"
As a comparative technique, a manufacturing method for forming a bezel decoration only by screen printing will be described.
A transparent PET film of 0.8 mmt was used for the decorative film.
The decorative film was affixed to a front plate made of a transparent acrylic substrate, cut and trimmed to a mounting size, and then sealed and used in a liquid crystal panel and a casing. The bezel pattern was designed with multiple impositions on the decorative film.

The frame pattern of the bezel decorations was designed with a black color of screen printing.
The company logo, camera lens opening, and infrared communication opening were designed with a frame pattern cutout pattern.
The company name logo and the infrared communication opening were designed with a design that prints other functional screen inks on the backing layer.

The production of the bezel decoration will be described again.
1) A frame pattern and an alignment mark for screen printing were formed on a PET film by screen printing.
2) The logo part of the company was formed by screen printing mirror ink and showing the color from the opening of the frame pattern.
3) The opening for infrared communication was formed by a method in which infrared transmission ink was printed cleanly and the opening of the frame pattern was pressed. The decorative film and the front plate were bonded together to form a front plate having a bezel pattern, which was cut and trimmed to the mounting size.

  By a conventional manufacturing method, the frame portion has a function of concealing the frame portion of the display panel with a single black color, but the frame portion is not integrated with the decoration of the casing portion, and the bezel decoration has a low design.

  By using the structure of the bezel decoration of the present invention and the manufacturing method thereof, it becomes possible to easily express a color metallic glossy color tone with a high mirror feeling. Used in combination with toned color materials, it can supply decorative items with various design features such as gradations and patterns, mobile phones with screen display functions, portable game machines, portable music players, personal computers and other electrical equipment, cosmetics It can be applied to surface decoration on plastic moldings such as containers.

  In addition, by diverting the composition of the photoresist to printing ink, it can be applied to surface decoration on parts using a glass substrate such as a display screen of home appliances that require transparency.

DESCRIPTION OF SYMBOLS 10 Bezel decoration 11 Frame pattern 16 Decorated substrate 17 Decoration pattern layer 18 Back pressing layer 19 Photolithographic alignment mark 110 Printing alignment mark 26 Transparent coating layer 31 Front plate 33 Touch panel 34 Display panel

Claims (7)

In bezel decorations on the display screen of portable digital devices,
It has a laminated structure of a decorative pattern layer on the surface side and a back presser layer formed on the back side of the decorative pattern layer,
The decorative pattern layer is composed of a highly transparent color material pattern that allows the back presser layer to be visually recognized, and the back presser layer is composed of a color material pattern that is more concealed than the decorative pattern layer. By becoming, the design is expressed by the color mixture of the said decoration pattern layer and the said back pressure layer, The bezel decoration characterized by the above-mentioned.   The color material with high transparency of the decorative pattern layer is any of negative photoresist for color filters of liquid crystal panels, ink for offset printing, ink for gravure printing, ink for inkjet printers, and ink for transfer printers. The bezel decoration according to claim 1, wherein   The bezel decoration according to claim 1 or 2, wherein a peak value of spectral transmittance of the coating film of the color material having high transparency is 40% or more.   The color material having high concealability of the backing layer is composed of a metal single layer film such as chromium, titanium, zirconium, and aluminum formed by a vacuum film forming method and a laminated film of each oxide, and the above-mentioned bezel decoration The bezel decoration object according to any one of claims 1 to 3, wherein the pattern shape is patterned by a photolithography method.   The color material having high concealability of the backing layer is made of a metallic glossy ink in which particles having metallic luster are dispersed, and is printed in the pattern shape of the bezel decoration. 3. The bezel decoration described in any one of 3.   The said bezel decoration thing is formed on to-be-decorated substrates, such as a film base material, a plastic substrate, and a glass substrate, The bezel decoration object of any one of Claims 1-5 characterized by the above-mentioned.   The bezel decoration according to any one of claims 1 to 6, wherein a transparent coating layer made of an organic resin or an inorganic film is laminated on the decoration pattern layer.

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