JP2007172241A - Screen film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain a stable touch panel operation with accurate light shielding performance while facilitating attachment/detachment. <P>SOLUTION: This screen film comprises a tough-operable first protective layer 10 for protecting a display screen, a second protective layer 13 laminated thereon through a colored layer 11 for controlling the luminance of light by use of a first adhesive layer 12, a second adhesive layer 14 for sticking the display screen laminated on the second protective layer 13, and a release film 15 releasably stuck onto the second adhesive layer 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a screen film suitable for use by being attached to a touch panel surface of an electronic device such as a portable information device.

  Conventionally, some electronic devices have a so-called touch panel operation function on a display screen of a liquid crystal display (LCD). Such an electronic device has a usage form in which a light-shielding film is pasted and used in order to protect the display screen and prevent the light on the display screen from leaking to the outside.

  In addition, when the electronic device is used outdoors, the electronic device is housed in a protective case with a sealed structure, and the touch panel of the display screen is operated from the operation window of the protective case while being housed in the protective case. There is also. This protective case is provided with an operation window corresponding to the display screen of the electronic device. And the said light shielding film is affixed on this operation window, and the operation of the touchscreen of the display screen of an electronic device is performed through this operation window of a protective case from this light shielding film.

By the way, as a means for light shielding such a display screen, a method of obtaining a desired light shielding performance by pasting a translucent resin film on the display screen and performing light shielding using the polarization effect and transmittance of the color, There is a method in which a film member called a louver film (for example, see Patent Document 1) in which transparent areas and dark color areas are alternately provided between resin sheets is disposed between a liquid crystal display (LCD) and a touch panel.
JP 2005-107011 A

  However, in the former method, the film thickness is as thick as 0.5 mm or more for realizing the desired light shielding performance, and it is difficult to reduce the thickness, so that it is difficult to apply to a touch panel display screen. Have a problem.

  Further, in the latter method, the film itself is similarly thick, so that there is a problem that the device casing becomes thick and it is necessary to separately attach a protective film for the touch panel surface.

  The present invention has been made in view of the above circumstances, and is a screen film that can realize simple and easy attachment / detachment, and can realize stable touch panel operation with high-precision light-shielding performance. The purpose is to provide.

  The present invention provides a first protective layer whose one surface can be touch-operated, a colored layer laminated on the other surface of the first protective layer, and a first adhesive layer on the other surface of the colored layer. A second protective layer that is disposed in a stacked manner to prevent the movement of the first adhesive layer and is bonded to the first protective layer via the first adhesive layer, and the second protective layer And a second adhesive layer that is detachably attached to the touch panel surface and a release film that is detachably attached to the other surface of the second adhesive layer. Configured.

  According to the above configuration, the first protective layer protects the display screen, and the colored layer blocks light, thereby reducing the luminance from the display screen and performing light shielding. And the 2nd protective layer laminated | stacked on both sides of a colored layer with respect to a 1st protective layer is adhere | attached on a 1st protective layer via a 1st adhesion layer, and is laminated | stacked on a colored layer. By preventing the movement of the first adhesive layer to the second adhesive layer for releasably attaching to the display screen by the second protective layer, and ensuring the adhesive properties, In the peeled state, the second adhesive layer can be repeatedly attached. Therefore, after the display screen is protected by the first protective layer and the light shielding by the colored layer is realized, the display screen can be easily attached to and detached from the display screen, and the usability can be improved.

  As described above, according to the present invention, there is provided a screen film capable of realizing simple and easy attachment / detachment, and capable of realizing stable touch panel operation together with high-precision light shielding performance. be able to.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a screen film 1 according to an embodiment of the present invention. A first protective layer 10 is made of, for example, polyethylene terephthalate (PET) resin, and preferably has a thickness of 125 μ to 100 μ. Then, for example, a hard coat process and a non-glare process are performed. The first protective layer 10 is formed by coating one side with a touch panel operation surface and the other side with three primary colors of red, green, and blue (R, G, B), for example, with UV coating. A colored layer 11 having a light shielding function is laminated.

  The colored layer 11 is preferably applied and laminated to have a thickness of 25 μm to 50 μm. When the colored layer 11 is dark, for example, it is formed to a thickness of 50 μ by applying twice, and in the case of a light color, the colored layer 11 is selectively formed to have a thickness of 25 μ by applying once. Is possible.

Here, the principle of light shielding by the colored layer 11 is that the luminous flux of light is Km (= 6831 m / W) as the maximum luminous sensitivity, V (λ) as the luminous sensitivity, and φe as the radiation luminous flux.
φ = Km ・ V (λ) ・ φe
It is expressed by the following formula. For example, as shown in FIG. 2, the colored layer 11 has a green (G) color having the highest visibility V (λ) and a low visibility V (λ) of blue (B) and red (R). By not allowing light to pass, it has the effect of reducing the decrease in luminance. Of these, the red (R) color has the effect of blocking the green (G) light having a high visibility V (λ) and increasing the luminance reduction. Therefore, the colored layer 11 is set to a light-shielding characteristic having a desired brightness value from the display screen 21 of the electronic device 20 shown in FIG. 3 by selecting the three primary colors and their densities. The light beam is blocked according to the characteristics.

  Then, on the other surface that is on the colored layer 11, for example, a transparent acrylic paste is applied as a first adhesive layer 12, preferably with a thickness of 30 μm. On the first adhesive layer 12, As the second protective layer 13, for example, polyethylene terephthalate (PET) resin is used, and is preferably laminated with a thickness of 25 μm. Here, the second protective layer 13 is adhered to the first protective layer 10 by the first adhesive layer 12 via the colored layer 11, and has an effect of preventing the movement of the first adhesive layer 23.

  Further, on the other surface on the second protective layer 13, as a second adhesive layer 14 for pasting a display screen, for example, a silicon-based paste is preferably applied in a thickness of 20 μ to 30 μ to be laminated. Is done. The second adhesive layer 14 is reliably separated from the first adhesive layer 12 by the second protective layer 13, and the first adhesive layer 12 is prevented from entering, and the display screen 21 of the electronic device 20 is displayed. The desired viscosity capable of being attached and peeled off is ensured, and repeated attachment / detachment use to the display screen 21 is realized.

  And the peeling film 15 for adhesion layer protection is affixed on the other surface which is on this 2nd adhesion layer 14, and can be affixed and peeled freely. The release film 15 is formed to have a thickness of, for example, 75 μm so that it can be repeatedly removed from the second adhesive layer 14. Thus, the 1st protective layer 10, the colored layer 11, the 1st adhesion layer 12, the 2nd protection layer 13, the 2nd adhesion layer 14, and the peeling film 15 are stacked and arranged in order on the screen structure.

  In the above configuration, for example, when pasting on the display screen 21 of the electronic device 20 as shown in FIG. 3, first, the release film 15 is peeled off from the second adhesive layer 14 and then the second adhesive layer. 14 is attached to the display screen 21 of the electronic device 20. Further, in the case where the electronic device 20 is used by being housed in, for example, a sealed protective case 22 as shown in FIG. 4, the display screen is displayed with the electronic device 20 being housed in the protective case 22. Similarly, the release film 15 is peeled off from the second adhesive layer 14 with respect to the operation window 23 opposed to 21, and the second adhesive layer 14 is attached and disposed.

  Here, the first protective layer 10 is arranged on the outermost side, can be touch-operated and has an effect of screen protection, and the colored layer 11 controls the luminance of light from the display screen 21 of the electronic device 20. Shield from light and set the external leakage to a minimum. Here, the touch panel operation of the display screen 21 can be performed on the first protective layer 10 in a state where light is shielded from the display screen 21 of the electronic device 20 (see FIG. 3). And in the state which stored the electronic device in the protective case, the touch panel operation of the display screen of an electronic device is attained through an operation window (refer FIG. 4).

  Further, in the usage form of the electronic device 20, when it is not necessary to block the light, the electronic device 20 is peeled off from the second adhesive layer 14 that is adhered and disposed on the display screen 21 or the operation window 23 of the protective case 22. By sticking the peeled release film 15 once on the adhesive layer 14 of No. 2, it can be used again when it becomes necessary to shield from light. Here, the display screen 21 of the electronic device 20 can be used at the original luminance of the device directly or through the operation window 24 of the protective case 23.

  As described above, the screen film 1 can be touch-operated, and the first adhesive layer 12 is sandwiched between the first protective layer 10 that protects the display screen and the colored layer 11 that controls the luminance of light. A second protective layer 13 is laminated, a second adhesive layer 14 for attaching a display screen is laminated on the second protective layer 13, and a release film 15 is formed on the second adhesive layer 14. Was configured to be peeled off.

  According to this, the second protective layer 13 is bonded to the first protective layer 10 via the first adhesive layer 12 and laminated on the colored layer 11, whereby the second protective layer 13 13, the first adhesive layer 12 is prevented from moving to the second adhesive layer 14 for releasably attaching to the display screen 21 of the electronic device 20, and the release film 15 is secured by ensuring its adhesive properties. In the peeled state, the second adhesive layer 14 can be repeatedly attached. As a result, the display screen 21 of the electronic device 20 can be protected by the first protective layer 10 and light shielding by the colored layer can be achieved, and the display screen 21 can be easily attached to and detached from the display screen 21 as desired. Usability can be realized.

  In the above-described embodiment, the case where the present invention is applied to a portable type has been described. However, the present invention is not limited to this and can be applied, and substantially the same effect is expected.

  Therefore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the effect of the invention can be obtained. In such a case, a configuration in which this configuration requirement is deleted can be extracted as an invention.

It is the figure shown in order to demonstrate the structure of the screen film which concerns on one embodiment of this invention. It is the characteristic view shown in order to demonstrate the light-shielding principle of the colored layer of FIG. It is the figure which showed the state which affixed the screen film of FIG. 1 on the display image of the electronic device. It is the figure which showed the state which affixed the screen film of FIG. 1 on the operation window of the protective case in which the electronic device was accommodated.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... 1st protective layer, 11 ... Colored layer, 12 ... 1st adhesion layer, 13 ... 2nd protection layer, 14 ... 2nd adhesion layer, 20 ... Electronic device, 21 ... Display screen, 22 ... Protection Case, 23 ... operation window.

Claims (4)

A first protective layer that can be touched on one side;
A colored layer laminated on the other surface of the first protective layer;
The colored layer is laminated on the other side of the first adhesive layer, prevents movement of the first adhesive layer, and adheres to the first protective layer via the first adhesive layer. A second protective layer,
A second adhesive layer that is laminated on the second protective layer and the other side of which is detachably attached to the touch panel surface;
A release film that is detachably attached to the other surface of the second adhesive layer;
A screen film comprising:   The screen film according to claim 1, wherein a plurality of the colored layers are formed by UV coating.   The first and second protective layers are made of polyethylene film, the first adhesive layer is made of acrylic glue, and the second adhesive layer is made of silicon glue. The screen film according to claim 1 or 2.   The screen film according to claim 1, wherein the first protective layer is subjected to a non-glare treatment.

Images