JP2009282228A - Decoration member of electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high quality decoration member which suppresses the distortion of a vapor-deposited external appearance under various using environments, improves the deterioration of exterior appearance quality and keeps design characteristic (design quality). <P>SOLUTION: The decoration member comprises: a transparent cover base member 121 on the one side of which a metallic vapor deposition layer 122 is formed; a double-stick tape 123 having the same figure as that of the cover base member 121 and high transparency and stuck on the metallic vapor deposition layer 122; and a resin film 124 having the same figure as that of the cover base member 121 and transparency and stuck on the double-stick tape 123. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a decorative member subjected to metal vapor deposition, and more particularly to a decorative member subjected to metal vapor deposition used for electronic equipment.

  In recent years, the mobile phone market has expanded greatly, and products of various types and designs have been sold due to diversification of user needs. In such a market environment, differentiation from other products has been demanded not only in terms of function but also in terms of design, and in particular, decorative members such as display screens and panels with decorative functions. Is effective in improving design.

  As a related technique of the present invention, in order to improve the design of the screen of the display unit of the mobile phone, a decorative member having a semi-transparent metal vapor deposition finish that can be seen from the dark side to the bright side, such as a half mirror, is used. Increasingly (Patent Document 1).

  FIG. 4 is an exploded perspective view showing the configuration of the display screen studied in the development process of the present invention, and FIG. 5 is a diagram showing the cross-sectional configuration of the display screen.

  The display screen 12 shown in FIGS. 4 and 5 includes a screen substrate 121 having a vapor-deposited layer 122 formed on the back surface, a print layer 125 that forms a transparent opening on the lower surface of the vapor-deposited layer 122, and a lower surface of the print layer 125. The double-sided adhesive tape 126 is bonded.

The display screen 12 is adhered to the front surface of the rear display unit of the folding cellular phone of the present invention (FIG. 1) by the double-sided adhesive tape 126, and a light-transmitting opening without the print layer 125 is located in the display unit. The surrounding area becomes a window frame by the printing layer 125, and the vapor deposition layer 122 has a decorative function like a mirror.
JP 2004-287140 A

  As described above, in a screen in which metal deposition is performed on the back surface of the screen substrate 121 and decoration is performed like a mirror, the metal deposition layer 122 is softened when used in an environment where the temperature and the humidity are high. Thus, a slight distortion occurs in the metal vapor deposition layer 122 due to the load generated by the stepped portion at the boundary due to the thickness of the printing 125 applied on the metal vapor deposition layer 122 and the double-sided adhesive tape 126 for fixing the screen 12, and the appearance is mirror-like. Since the uniformity of the surface is high, the distortion appears as a distortion of the appearance surface, and there is a problem in that the design property is impaired and the merchantability is lowered.

(the purpose)
The objective of this invention is providing the decoration member of the electronic device which can solve the above problems.

  The decorative member of the first electronic device according to the present invention includes a transparent cover base material having a metal vapor-deposited layer formed on one side, and a highly transparent double-sided adhesive tape on the opposite side of the metal vapor-deposited layer to the cover base material. And a transparent resin film on the opposite side of the metal vapor deposition layer of the double-sided adhesive tape.

  According to the present invention, under various usage environments such as changes in usage environment and changes over time, distortion of the vapor-deposited appearance due to the use of a double-sided adhesive tape for adhesion to a printed layer or an electronic device is suppressed, and appearance quality is improved. It is possible to provide a high-quality decorative member that can improve deterioration and maintain designability (designability).

  An embodiment of a decorative member for an electronic device according to the present invention will be described in detail. An embodiment of the decorative member according to the present invention will be described below in detail with reference to an application example to a display screen mounted on a display unit that displays information on a casing of a mobile phone.

(Description of configuration)
FIG. 1 is a perspective view showing the appearance of a mobile phone using a display screen according to an embodiment of the present invention. The cellular phone 1 according to the present embodiment includes a lower casing 1a and an upper casing 1b, and the lower casing 1a and the upper casing 1b are connected to each other by hinge portions 1c formed at respective end portions, and are foldable. Mobile phone.

  The lower casing 1a and the upper casing 1b are each configured by engaging a front case on the front side and a rear case on the back side in a state in which the folding cellular phone is opened. The front (front) case of the lower casing 1a is provided with a key operation unit, the main display section is provided on the front case of the upper casing 1b, and the sub-display section (rear display section) 11 is provided on the rear (rear) case of the upper casing 1b. Etc.

  The display screen 12 of this embodiment is attached to the front surface of the rear display unit 11 with a double-sided adhesive tape in order to protect the rear display unit 11 and improve the design of the mobile phone 1.

  FIG. 2 is an exploded view showing the configuration of the display screen of the present embodiment, and FIG. 3 is a cross-sectional view showing the configuration of the display screen of the present embodiment.

  As shown in FIGS. 2 and 3, the display screen 12 is a plate-like cover base material (screen base material) 121 formed of a transparent resin and having a light-transmitting metal vapor-deposited layer 122 formed on the entire back surface. And a screen layer 121, a highly transparent double-sided adhesive tape 123, and a printed layer 125 for forming a window frame or the like on the opposite surface of the surface facing the metal vapor deposition layer 122. And a transparent resin film 124, and a double-sided adhesive tape 126 for fixing the display screen 12 to the rear display unit of the folding mobile phone 1.

  Here, it is preferable that the double-sided adhesive tape 123 and the resin film 124 have the same outer shape as the screen substrate 121. Further, in order to improve the design of the display screen 12, the screen base 121 is finished like a mirror on the back side of the screen base 121 with a metal vapor deposition film such as tin or aluminum.

  Further, as the material of the screen substrate 121, for example, acrylic or polycarbonate can be used, and as the material (resin) of the resin film 124, for example, polyester or polycarbonate can be used.

(Description of operation)
Next, based on the configuration of the display screen of the present embodiment, a function or operation for suppressing distortion of the appearance surface against environmental changes, secular changes, etc. will be described below.

  In a display screen in which the double-sided adhesive tape 123 and the resin film 124 are not bonded to the metal vapor-deposited layer 122 applied to the back surface of the screen substrate 121, the printed layer 125 is formed and carried by the fixing double-sided adhesive tape 126. When mounted on an electronic device such as a telephone, a load (load) is generated in the stepped portion due to the thickness of the printed layer 125 and the fixing double-sided adhesive tape 126, and this is concentrated on the edge of the stepped portion.

  For example, an external force applied to the display screen, such as when pressed from the screen substrate side, and stress (stress) based on expansion and contraction of each material due to temperature change concentrate on the edge of the step portion. This phenomenon can occur regardless of whether each material is flexible or not.

  As a result, a slight distortion occurs in the edge portion of the step portion of the metal vapor deposition layer 122, and the reflection of the mirror surface changes from the other portions in the distortion portion, and a line shape or a band shape along the edge portion. As a result, the appearance is like a shadow, and the design is impaired and the merchantability is reduced.

  This is because the appearance is mirror-like and the surface uniformity is high, so it appears as distortion of the appearance surface, which is the result of the loss of the smoothness or uniformity of the mirror surface of the part where the distortion occurred, This appears remarkably when the metal deposition layer 122 is softened under high humidity.

  On the other hand, when the resin film 124 is bonded to the metal vapor deposition layer 122 of the screen substrate 121 via the double-sided adhesive tape 123 as in the present invention, the metal vapor deposition layer 122 is softened under high temperature or high humidity. In addition, the metal deposition layer 122 is protected by the resin film 124 through the double-sided adhesive tape 123.

  For this reason, the load on the edge portion of the stepped portion is dispersed by the resin film and is uniformly transmitted over the entire surface, and as a load concentrated on the stepped portion of the boundary due to the thickness of the printing layer 125 and the fixing double-sided adhesive tape 126. Direct participation can be avoided. The dispersion of the load at the edge portion of the stepped portion is more effective when a certain degree of rigidity is given to the resin film.

  As described above, according to the present embodiment, it is possible to avoid the influence on the metal vapor deposition layer due to the load of the edge portion of the stepped portion, suppress the distortion of the edge portion of the stepped portion of the metal vapor deposited layer 122, It is possible to eliminate distortion of the appearance.

  In particular, the influence of the load on the edge of the step portion on the metal vapor deposition layer is effective when the double-sided adhesive tape 123 and the resin film 124 have the same shape as the outer shape of the surface of the screen substrate 121 as in this embodiment. It is.

  That is, if the size (shape) of the surfaces of the double-sided adhesive tape 123 and the resin film 124 is made smaller than the size of the screen base material (size of the metal vapor deposition portion), the end surface of the resin film that should protect the metal vapor deposition layer 122 However, if the double-sided adhesive tape 123 and the resin film 124 have the same shape as the screen base 121, the generation of such a load can be prevented.

  As described above, in this embodiment, a screen base material in which a translucent metal vapor-deposited film is applied to the entire back surface of a transparent and plate-like resin, and a highly transparent double-sided adhesive tape having the same shape as the screen base material And a transparent resin film having the same shape as the screen base material on the opposite side of the surface facing the vapor deposition film.

  Further, printing is performed on the resin film to form a window frame of the display screen, and a double-sided adhesive tape for fixing the display screen to an electronic device or the like is adhered.

  By adopting such a configuration, it is possible to suppress distortion of the vapor deposition appearance surface that occurs in the parting portion of printing or the outer shape of the double-sided adhesive tape due to changes in usage environment such as temperature and humidity, and changes with time.

(Other embodiments)
In the above embodiment, the application example to the screen for protecting the display portion of the mobile phone casing as the decorative member has been shown. However, the present invention is applicable to electronic devices other than the mobile phone, and further displays the casing of the electronic device. It can be applied to protect openings other than the portion.

  In addition, the decorative member of the present invention is not limited to the configuration as a screen, and is generally applicable to a decorative member configured by performing metal vapor deposition on the back side of a transparent material.

  For example, it can be configured as a decorative panel for an electronic device. Also as an embodiment of the decorative panel, a transparent cover base material having a metal vapor deposition layer formed on one side, a highly transparent double-sided adhesive tape having the same shape as the cover base material adhered on the metal vapor deposition layer, It is comprised from the transparent resin film of the same shape as the said cover base material adhere | attached on the double-sided adhesive tape.

  Further, the metal vapor deposition layer of the decorative panel is formed as a semi-permeable decorative layer, and a partial printing layer such as forming an opening on the resin film at a position corresponding to an opening of an electronic device or the like. And a double-sided adhesive tape for adhering to the electronic device is adhered to the printed layer.

  As described above, the decorative member of the present invention can be used such as temperature and humidity by printing on a resin film or using a double-sided adhesive tape in a mirror-like decoration by semi-transparent metal deposition on the back side. It is possible to suppress the distortion of the vapor-deposited appearance surface that occurs due to changes in the environment and changes over time, and the appearance of the double-sided adhesive tape, which suppresses deterioration in appearance quality and maintains high design quality. Can be configured as a product.

  The present invention relates to a decorative member that can be attached as a cover to an opening or the like of a housing that can be seen through, such as a display unit. Therefore, the present invention is not limited to a portable terminal such as a cellular phone, It can be applied as a screen or panel of an electronic device such as a camera, a clock, or an audio device.

It is a perspective view which shows the external appearance of the mobile telephone using the display screen of one Embodiment of this invention. It is an exploded view which shows the structure of the display screen of this embodiment. It is sectional drawing which shows the structure of the display screen of this embodiment. It is a disassembled perspective view which shows the structure of the display screen examined in the development process of this invention. It is a figure which shows the cross-sectional structure of the display screen.

Explanation of symbols

1 Mobile phone 11 Rear display (sub-display)
12 Display screen 121 Screen base material 122 Metal vapor deposition film (layer)
123 Double-sided adhesive tape 124 Resin film 125 Printing (layer)
126 Double-sided adhesive tape

Claims (10)

A transparent cover base material having a metal vapor deposition layer formed on one side, a highly transparent double-sided adhesive tape on the opposite side of the metal vapor deposition layer to the cover base material, and a surface opposite to the metal vapor deposition layer of the double-sided adhesive tape And a transparent resin film on the side. 2. The decorative member for an electronic device according to claim 1, wherein the double-sided adhesive tape and the resin film have the same surface shape as the cover base material. 3. The decorative member for an electronic device according to claim 1, wherein the metal vapor-deposited layer is formed as a light semi-transmissive decorative layer. A partial printed layer on the opposite side of the resin film from the double-sided adhesive tape, and a double-sided adhesive tape for bonding to the electronic device on the opposite side of the printed layer from the resin film. The decorative member for an electronic device according to any one of claims 1 to 3. The decorative member for an electronic device according to any one of claims 1 to 4, wherein the decorative member is configured as a screen for a display unit of the electronic device. 6. The decorative member for an electronic device according to claim 5, wherein the electronic device is a foldable portable terminal. The decorative member for an electronic device according to claim 6, wherein the display unit is a rear display unit of a casing of a foldable portable terminal. 5. The decorative member for an electronic device according to claim 1, wherein the decorative member is configured as a decorative panel for the electronic device. 9. The decorative member for an electronic device according to claim 1, wherein the cover base is an acrylic or polycarbonate plate. The decorative member for an electronic device according to any one of claims 1 to 9, wherein the resin film is a polyester or polycarbonate film.

Images