JP2000352936A - Display structure of portable information terminal and its visual field regulating means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the confidentiality of information at a portable information terminal by providing an information display screen of the portable information terminal with a visual field regulating means which permits the transmission of the information within a prescribed angle range of the normal of this screen. SOLUTION: A plastic seal 3 comprises a polarizing film 4, tacky adhesive layers 5 and 6 and a cover film 7. Vertical stripes 8 extending in the vertical direction of the portable telephone are formed at the polarizing film 4. The vertical stripes 8 are composed of a structure to form a multiplicity of grooves of fine widths on the transparent plastic sheet which is the base material of the polarizing film 4. The vertical stripes 8 of the polarizing film 4 are invisible with naked eyes from the front of the display screen of the portable telephone but extend in the longitudinal direction of the display screen, making it possible to view the screen contents displayed at the front surface of the portable telephone and within the prescribed angles a on both sides and making the displayed screen contents invisible from outside the range of the prescribed angle α on both sides. Accordingly, other persons are made to hardly view the information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display structure of a portable information terminal such as a portable telephone, a portable personal computer, a portable game machine, and the like. More specifically, the information displayed on the display is read by another person. The present invention relates to a display structure of a portable information terminal and a view restriction means for the display device.

[0002]

2. Description of the Related Art Recently, in a portable telephone (PHS: personal handy phone), a portable personal computer, an information display terminal for displaying information of a portable telephone, or a portable game machine, personal information is transmitted through a communication line or the like. Can be displayed or operated.

[0003]

However, in the case of a portable information terminal, it is often used in a train, in a crowded place, or the like. (For example, e-mail passwords, telephone numbers, personal identification numbers, address names, customer data, competitive game information, etc.) displayed in the, may be read by others.

The present invention focuses on such a problem, and has as its object to improve the confidentiality of information in a portable information terminal.

[0005]

In order to solve the above-mentioned problems, a display structure of a portable information terminal according to a first aspect of the present invention is provided on an information display screen of the portable information terminal, and a predetermined normal line of the screen is provided. It is characterized in that a view restricting means for allowing the transmission of the information within an angle range is provided.

In the first aspect, the portable information terminal includes a portable telephone (including a PHS: personal handy phone), a portable personal computer, an information display terminal for displaying information on the portable telephone, a portable game machine, and the like. Including.

[0007] The information display screen includes a transparent plate of a display of the terminal main body for transmitting and displaying an image such as a character or a figure in these information display terminals. Therefore, the visibility control means may be provided on the transparent plate of the display itself, or the visibility control means may be provided on the surface of the transparent plate of the display in a state of sticking, bonding, contacting, and non-contacting.

This view restriction means has a substance having a low refractive index or transmittance, such as a vertical stripe, a horizontal stripe, an annular stripe, an orthogonal lattice, a dot, a honeycomb shape or a rectangular shape, or a groove or a projection. When fixing to a transparent plate of a display, for example, a plastic sheet (including a plastic film), a plastic plate, or a lattice plate is used.

A plastic sheet, a plastic plate, a lattice plate, or a transparent plate of a display may be formed with a narrow groove or the like extending in the thickness direction in a lattice shape. When a thin groove of the visibility control means is formed, a substance having a low refractive index or a low transmittance may be arranged in the groove.

[0010] By providing the visibility control means on the information display screen in this way, when the user of the portable information terminal views an e-mail, performs a bank transaction, or the like, another person such as a neighbor can use a password or the like from the side. This makes it difficult to view highly confidential information such as a password.

The display structure of the portable information terminal according to claim 2 of the present invention is the display structure of the portable information terminal according to claim 1, wherein the view restriction means is formed of a plastic sheet having a plurality of grids extending in one direction. Wherein the grid of the plastic sheet is oriented along the longitudinal direction of the information display screen.

According to the display structure of the portable information terminal of the second aspect of the present invention, the transmission of information is allowed within a predetermined range angle of the normal to the surface of the plastic sheet, so that a person beside the display can display the information. It is possible to prevent peeping. Moreover, since it is only necessary to attach a plastic sheet, it can be applied to existing portable information terminals,
It is also possible to select or replace the color and pattern of the plastic sheet, or remove it when it is no longer needed.

According to a third aspect of the present invention, there is provided the display structure of the portable information terminal according to the second aspect, wherein a plurality of plastic sheets of the information display screen are overlapped with each other. The orientation of the lattice is changed.

According to the display structure of the portable information terminal according to the third aspect of the present invention, a plurality of plastic sheets each having a lattice are stacked at different angles, so that not only the peeping from the left and right sides of the display, In addition, it is possible to restrict the peeping from up, down, or oblique directions, and it does not cost much.

According to a fourth aspect of the present invention, there is provided a display structure of a portable information terminal according to any one of the first to third aspects, wherein the information display screen is formed of a transparent member. Is provided, and the view restricting means is provided on the support member.

According to the display structure of the portable information terminal according to the fourth aspect of the present invention, since the surface of the support member attached to the surface of the information display screen provides a space between the information display screens,
The field of view in which the information on the information display screen can be seen is further narrowed, and it is possible to further prevent the information from being looked into from the side of the terminal. The view restricting means of the support member may have the grid or the like formed on the support member itself, or may have the plastic sheet, plastic plate, or grid plate on the front surface, back surface, or intermediate portion of the support member. This support member may be opened and closed by a hinge or the like.

According to a fifth aspect of the present invention, there is provided a portable information terminal having a view restricting means attached to a display of the portable information terminal according to any of the first to fourth aspects.
The information display screen is made of a plastic sheet having a grid extending at least in a vertical direction with respect to a character string in a horizontal direction of the information display screen.

According to the visibility control means of claim 5 of the present invention, by sticking on the display of the portable information terminal, peeping from the side of the terminal can be easily prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a display structure of a portable information terminal according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a portable telephone 1 as a portable information terminal.
FIG. 2 shows a plastic seal 3 as a view restriction means attached to the display screen 2 of the mobile phone 1.
Is shown. FIG. 3 is an enlarged view of a cross-sectional configuration of the plastic seal 3. The plastic seal 3 includes a polarizing film 4, pressure-sensitive adhesive layers 5 and 6, and a cover film 7. The polarizing film 4, the adhesive layers 5, 6 and the cover film 7 are made of a transparent material. Vertical stripes 8 extending in the vertical direction of the mobile phone 1 are formed on the polarizing film 4.

The vertical stripes 8 have a structure in which a number of fine width grooves are formed in a transparent plastic sheet (including a plastic film here) serving as a base material of the polarizing film 4.
Alternatively, it is constituted by a structure in which high-molecular substances having a low refractive index of light are arranged in a striped manner on a transparent plastic sheet.
This polarizing film 4 is attached to a transparent plastic cover 4 forming the surface of the display screen 2.

The vertical stripes 8 of the polarizing film 4 are
From the front of the display screen 2 is not visible to the naked eye,
As shown in FIG. 2, it extends in the vertical direction of the display screen 2 (longitudinal direction of the mobile phone 1), and is within the front of the mobile phone 1 (arrow C in FIG. 3) and a predetermined angle on both sides (angle α in FIG. 3). It is possible to see the displayed screen contents from outside the range of the predetermined angle on both sides. The vertical stripes 8 may be filled with a plastic having a low refractive index.
Those having a striped pattern on the surface may be formed by laminating them so that the protrusions and depressions match each other.

FIG. 4 shows a plastic seal 10 in which the polarizing film 4 is double laminated. In this plastic seal 10, the vertical stripes 8 of the two polarizing films 4 intersect each other at right angles, and the plastic seal 10 has lattice lattices 11 in an orthogonal lattice pattern. The polarizing film 4 may have a honeycomb shape intersecting at an angle of 60 °. In this case, the polarizing film 4 has three layers.

FIG. 5 shows a display screen 2 of the mobile phone 1.
1 shows a view restriction plate 20 to be mounted on the display device. This view restriction plate 20
Is a polarizing film 4 on the surface of a transparent acrylic base 21 which holds the body case of the mobile phone 1 so as to hold it.
Is pasted. The surface of the base 21 is convexly curved, but may be flat. On both sides of the base 21, arm portions 22 for holding and holding the main body case are formed. The base 21 is formed to be thick, and by increasing the distance between the polarizing film 4 and the display image on the display screen 2, the visibility control effect is improved so that the display image cannot be seen from the left and right sides. ing.

In the above description, the polarizing film 4 is attached to the portable telephone 1 as a portable information terminal. However, the polarizing film 4 may be attached to a display screen 31 of a portable computer 30 shown in FIG.

By providing visibility control means on the information display screen in this way, when a user of the portable information terminal views an e-mail or conducts a bank transaction, another person such as a neighbor can use a password or the like from the side. This makes it difficult to see highly confidential information such as passwords, address names, customer information, and competitive game information.

[0027]

According to the display structure of the portable information terminal according to the first aspect of the present invention, by providing the information display screen with the view restriction means, the user of the portable information terminal can view an e-mail or perform a bank transaction. For example, it is possible to make it difficult for another person, such as a neighbor, to see highly confidential information such as a password or a password from the side.

According to the display structure of the portable information terminal according to the second aspect of the present invention, since the transmission of information is allowed within a predetermined range angle of the normal to the surface of the plastic sheet, a person beside the display can display the information. It is possible to prevent peeping. Moreover, since it is only necessary to attach a plastic sheet, it can be applied to existing portable information terminals,
It is also possible to select or replace the color and pattern of the plastic sheet, or remove it when it is no longer needed.

According to the display structure of the portable information terminal according to the third aspect of the present invention, since a plurality of plastic sheets having a lattice are stacked at different angles, not only the peeping from the left and right sides of the display, In addition, it is possible to restrict the peeping from up, down, or oblique directions, and it does not cost much.

According to the display structure of the portable information terminal of the fourth aspect of the present invention, since the surface of the support member attached to the surface of the information display screen provides a space between the information display screens,
The field of view in which the information on the information display screen can be seen is further narrowed, and it is possible to further prevent the information from being looked into from the side of the terminal. The view restricting means of the support member may have the grid or the like formed on the support member itself, or may have the plastic sheet, plastic plate, or grid plate on the front surface, back surface, or intermediate portion of the support member. This support member may be opened and closed by a hinge or the like.

According to the visibility control means of the fifth aspect of the present invention, by sticking on the display of the portable information terminal, peeping from the side of the terminal can be easily prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a plastic seal is attached to a mobile phone according to an embodiment of the present invention.

FIG. 2 is a view conceptually showing vertical stripes of the plastic seal of FIG. 1;

FIG. 3 is a diagram showing a cross-sectional configuration of the plastic seal of FIG. 1;

FIG. 4 is a conceptual diagram of a case where a polarizing film is formed in two layers in the plastic seal of FIG. 1 and orthogonal lattice fringes are formed.

FIG. 5 is a perspective view of a base as a support member of a polarizing film that can be mounted on the mobile phone of FIG. 1;

FIG. 6 is a perspective view showing a state in which a polarizing film is attached to a display screen of a portable computer.

[Explanation of symbols]

 Reference Signs List 1 mobile phone 2 display screen 3 plastic seal 4 polarizing film (plastic sheet) 5 adhesive layer 7 cover film 8 vertical stripe 10 plastic seal 21 base 22 leg

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H088 EA22 HA18 MA20 2H091 FA07X FA50X FB02 FD06 FD07 FD15 GA16 LA30 5G435 AA00 FF00 FF05 HH02 HH05 KK07 LL07 5K023 AA07 BB06 HH01 HH07 MM00 MM21 PP02

Claims (5)

[Claims] 1. A display for a portable information terminal, comprising: an information display screen of the portable information terminal provided with a view restriction means for allowing transmission of the information within a predetermined angle range of a normal line of the screen. Construction. 2. The display structure of a portable information terminal according to claim 1, wherein said view restriction means forms a large number of grids extending in one direction to transmit information within a predetermined angle range of a normal line of the surface. A display structure for a portable information terminal, comprising: a permissible plastic sheet, wherein the plastic sheet is oriented so that the grid extends along a vertical direction of the information display screen. 3. The display structure of an information terminal according to claim 2, wherein a plurality of plastic sheets of said information display screen are overlapped, and a direction of a lattice of each plastic sheet is changed. Structure of information terminal for personal computer. 4. A display structure of a portable information terminal according to claim 1, wherein a support member made of a transparent material is provided on said information display screen, and said view restricting means is provided on said support member. A display structure of a portable information terminal characterized by being used. 5. A view restricting means attached to a display of a portable information terminal according to claim 1, wherein said view restriction means is attached to a character string in a horizontal direction of said information display screen at least in a vertical direction. A view restricting means for a portable information terminal, comprising a plastic sheet having an extended lattice.