JP5429455B2 - Visible angle limiting display device, visible angle limiting film structure, and portable device - Google Patents

Description

  The present invention relates to a display device using a film for limiting the visible angle, a visible angle limiting film structure, and a portable device using the same.

  In order to prevent a display screen of a mobile phone terminal, a portable information communication terminal, or various electronic devices from being looked into from the periphery, an optically translucent film called a louver film may be attached to the display portion. The louver film has a fine long lattice-like structure called a louver, and has a characteristic of transmitting light in a direction normal to the film and parallel to the louver and blocking light in other directions. By utilizing this characteristic, products generally called peep prevention films are commercially available.

  For example, as shown in FIGS. 1A and 1B, the vertical direction of the display screen and the direction in which the louver shading layer extends (hereinafter referred to as louver) on the display unit mounted on the housing 10 of the mobile phone terminal. Direction or visible direction)). In this case, as shown in FIG. 1A, the display screen is visible when viewed from the front and the vertical direction of the screen, but is invisible from the horizontal direction as shown in FIG. 1B (Patent Document 1). reference).

  Further, Patent Document 1 or Patent Document 2 discloses a display device that limits the visible angle in all directions in the vertical and horizontal directions or in the front and rear, left and right directions in front of the display surface by forming a louver in a mesh shape. Yes.

JP 2000-352936 A JP 2008-304568 A

  However, in recent years, portable communication terminals capable of changing a vertically long screen to a horizontally long display have started to spread. In this case, in the louver film fixed in the vertical direction of the screen display unit, as shown in FIG. 1C, the louver direction (visible direction) is also rotated by 90 ° by rotating the display unit 10 by 90 °, The screen becomes visible from the left and right direction of the screen.

  As this solution, as disclosed in Patent Documents 1 and 2, it is possible to limit the visible angle in all directions of up, down, left and right, but when the visible angle is limited in all such directions, The user's own visible range is also limited in all directions, which makes it difficult to see the display screen. In particular, a third party who is not a user often looks into the mobile screen terminal from the left-right direction in many cases, and it is desirable for the user that the screen is visible from the up-down direction.

  In addition, it is conceivable that the peep prevention film is not fixed to the display unit and is independent of the rotation of the screen. However, since the aspect ratio of the screen is different, a part of the screen is a film with the same size as the screen. Protrudes from the area that covers. The content displayed on the part that protrudes from the film becomes visible from the surroundings. Further, if the size of the film is large enough to cover the entire screen even if the screen is rotated, the size of the film becomes larger than that of the mobile phone terminal, which disadvantageously impairs the convenience and portability of the device.

  Accordingly, an object of the present invention is to provide a visible angle limited display device and a visible angle that can effectively limit the visible angle without impairing the user's own visibility even when the display screen is rotated between portrait and landscape. It is to provide a limiting film structure and a portable device.

  The visible angle limited display device according to the present invention is a visible angle limited display device having a rectangular display screen with one side longer than the other, the transparent film provided on the display screen, and the transparent film on the transparent film Two visible angle limiting films, each having a single visible direction, an axis provided at a pair of corners of the transparent film and each of the visible angle limiting films, with the axis as the center And connecting means for connecting the respective visible directions so as to be independently rotatable.

  The visible angle limiting film structure according to the present invention is a visible angle limiting film structure attached to a display unit having a rectangular display screen whose one side is longer than the other, and a transparent film for covering the display screen, Two visible angle limiting films provided on the transparent film, each having a single visible direction, a shaft provided at a pair of corners of the transparent film, and each of the visible angle limiting films, And connecting means for connecting the respective visible directions so as to be independently rotatable about the axis.

  The portable device according to the present invention is a portable device having a rectangular display portion whose one side is longer than the other, the transparent film provided on the display portion, and the transparent film provided on the transparent film. The two visible angle limiting films having the visible direction, the shaft provided at a pair of corners of the transparent film, and each of the visible angle limiting films are independent from each other about the axis. And connecting means for connecting so as to be rotatable.

  According to the present invention, even if the display screen is rotated between portrait and landscape, the visible angle can be effectively limited without impairing the user's own visibility.

(A) is a plan view of a portable communication terminal with a general peeping prevention film attached to the screen display (vertical screen), and (B) is a screen that is hidden when viewed from an oblique horizontal direction. FIG. 4C is a plan view of a mobile communication terminal in which a general peeping prevention film is mounted on a rotary display unit. It is a top view which shows schematic structure of the visible angle restriction | limiting display apparatus by 1st embodiment of this invention. (A) is a schematic diagram showing an example of a portable terminal when the visible angle limited display device according to the present embodiment is used on a vertical screen, and (B) is a portable phone when the visible angle limited display device is used on a horizontal screen. It is a schematic diagram which shows an example of a terminal. It is a top view which shows schematic structure of the visible angle restriction | limiting display apparatus by 2nd embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by embodiment described below.

1. 1. First Embodiment 1.1) Configuration In FIG. 2, the display unit of the mobile terminal has a rectangular display screen with different side lengths. A transparent film 101 that transmits light in all directions is mounted so as to cover the display screen, and two shafts 102a and 102b are fixedly disposed on the display unit at diagonal positions of the transparent film 101. The transparent film 101 can be bonded and fixed on the display unit by static electricity, atmospheric pressure, an adhesive or other action. Alternatively, it may be detachably mounted. Further, on the transparent film 101, two louver films (visible angle limiting films) 103a and 103b are rotatably attached through shafts 102a and 102b so as to cover at least the entire display screen. Here, the louver films 103a and 103b each have a substantially rectangular shape, and the entire transparent film 101 is covered by aligning the two sheets.

  Specifically, a bearing slit 104a is formed on one side of the louver film 103a, and the shaft 102a passes through the bearing slit 104a so that the louver film 103a is movably connected. By this connecting means, the louver film 103a can slide relative to the shaft 102a along the bearing slit 104a on the transparent film 101, and can rotate around the shaft 102a (hereinafter, referred to as “the louver film 103a”). Such sliding and rotation is called rotation.)

  Similarly, a bearing slit 104b is formed on one side of the louver film 103b, and the shaft 102b passes through the bearing slit 104b so that the louver film 103b is movably connected. By this connecting means, the louver film 103b can slide relative to the shaft 102b along the bearing slit 104b on the transparent film 101, and can rotate about the shaft 102b.

  Here, the louver direction (visible direction: the direction in which the louver shading layer extends) 105a of the louver film 103a is perpendicular to the longitudinal direction of the bearing slit 104a, and the louver direction 105b of the louver film 103b is the longitudinal direction of the bearing slit 104b. Are set in directions orthogonal to each other. As is well known, the louver film has a limited viewing angle in a direction orthogonal to the louver direction. Therefore, if it is set so that the display screen can be viewed in the field of view of the predetermined range (range corresponding to the display screen) in the direction of the louver and the direction orthogonal to the normal line of the center position of the display screen, it is orthogonal to the louver direction. The display screen is hidden in the field of view outside the predetermined range in the direction in which the image is to be displayed.

  Note that the louver directions (visible directions) of the louver films 103a and 103b only need to be independently rotatable, so the two axes 102a and 102b are not only the corners of the diagonal position of the transparent film 101 but also the longitudinal direction. It can also be provided at a pair of corners in the direction.

  As described above, the two louver films 103a and 103b are connected to the display unit so as to be rotatable on the transparent film 101, whereby the louver directions 105a and 105b of the two louver films 103a and 103b are displayed in a vertically long display screen. It is possible to appropriately change the display screen so as not to be seen from the left and right directions, depending on whether it is horizontal or landscape. When the louver films 103a and 103b rotate, the transparent film 101 is interposed, so that damage to the surface of the display unit due to sliding of the louver film can be prevented.

  A visible angle limiting film structure in which the transparent film 101, the louver films 103a and 103b, and the shafts 102a and 102b are integrated in a frame structure as shown in FIG. By mounting, it is possible to control the visible angle of the screen display unit according to the rotation of the display unit.

1.2) Operation As shown in FIG. 3, in the mobile communication terminal equipped with the display device according to the present embodiment, the orientation of the display unit housing 100 can be rotated by 90 ° with respect to the operation unit housing 200. As described above, the transparent film 101 is attached to the display device of the display unit housing 100 so as to cover the display screen, and the two shafts 102a and 102b are fixed to the display unit at diagonal positions of the transparent film 101, On the transparent film 101, louver films 103a and 103b are rotatably attached to the bearing slits 104a and 104b through the shafts 102a and 102b, respectively.

  As shown in FIG. 3A, when the screen display unit of the mobile communication terminal is used in a vertical screen, the louver films 103a and 103b are rotated so that the louver directions of the louver films 103a and 103b are vertical. To do. Here, a case where the longitudinal direction of the screen display unit of the mobile communication terminal coincides with the longitudinal direction of the mobile communication terminal, in other words, a case where the screen is used with the tip portion facing up or down is defined as a vertically long screen. In this case, light is not transmitted in the left-right direction of the screen, and visual recognition from the left-right direction is blocked. That is, the contents displayed on the screen display unit of the mobile communication terminal cannot be seen from the left-right direction.

  Next, as shown in FIG. 3B, when the screen display portion of the mobile communication terminal is used in a horizontal screen, the louver film is rotated so that the louver directions of the louver films 103a and 103b are vertical. Here, a case where the front end portion of the screen display unit of the mobile communication terminal is used in a right or left direction is defined as a horizontally long screen. Even in the case of a landscape screen, the louver direction of the louver films 103a and 103b is the vertical direction, so that light is not transmitted in the left-right direction of the screen, and viewing from the left-right direction is blocked. That is, the contents displayed on the screen display unit of the mobile communication terminal cannot be seen from the left-right direction.

1.3) Effect As described above, according to the present embodiment, it is possible to rotate the louver films 103a and 103b in both cases in which the screen display unit of the mobile communication terminal is a vertically long screen or a horizontally long screen. The viewing angle can be controlled. That is, in any case, by turning the louver film so that the louver direction is the vertical direction, the visible angle from the left and right directions of the screen display unit can be blocked.

2. Second Embodiment The present invention is not limited to the visible angle limiting film rotation mechanism as shown in FIG. 2, and the same effect can be obtained by mounting the visible angle limiting film so that it can be turned over.

  As shown in FIG. 4, a transparent film 101 is mounted on the display unit so as to cover the display screen, and two louver films (visible angle limiting films) 301a and 301b are supported on the transparent film 101 by shafts 302a and 302b. Are attached so that they can be turned inside out. The shafts 302a and 302b are fixed to the display unit. Here, it is assumed that the louver films 301a and 301b each have a substantially rectangular shape, and the entire transparent film 101 is covered by aligning the two sheets.

  Specifically, one corner of the louver film 301a is connected to the shaft 302a. By this connecting means, the louver film 301 a can be opened with respect to the transparent film 101 around the axis 302 a, turned over as indicated by an arrow 303, and closed with respect to the transparent film 101. Thereby, the louver direction of the louver film 301a can be rotated by 90 °. Similarly, one corner of the louver film 301b is connected to the shaft 302b. By this connecting means, the louver film 301b can be opened with respect to the transparent film 101 about the shaft 302b, turned over, and closed with respect to the transparent film 101. Thereby, the louver direction of the louver film 301b can be rotated by 90 °.

  By configuring in this way, the louver directions of the two louver films 301a and 301b are appropriately changed so that the display screen cannot be seen from the left and right directions depending on whether the display screen is vertically long or horizontally long. It becomes possible to do. By mounting such louver films 301a and 301b, which are visible angle limiting films, on the screen display unit of the mobile communication terminal, the visible angle of the screen display unit can be controlled according to the rotation of the display unit.

  According to this embodiment, the visible angle can be controlled by turning the louver films 301a and 301b upside down in both cases where the screen display unit of the mobile communication terminal is a vertically long screen or a horizontally long screen. That is, in any case, by turning the louver film so that the louver direction is the vertical direction, the visible angle from the left and right directions of the screen display unit can be blocked.

  The present invention is applicable to a portable information device such as a cellular phone terminal having a display unit.

100 Display housing 101 Transparent film
102a, 102b axis
103a, 103b louver film
104a, 104b Bearing slits 105a, 105b Louver direction 200 Operation unit housing

Claims (12)

A visible angle limited display device having a rectangular display screen with one side longer than the other,
A transparent film provided on the display screen;
Two visible angle limiting films provided on the transparent film, each having a single visible direction;
A connecting means for connecting the shafts provided at a pair of corners of the transparent film and each of the visible angle limiting films so that the respective visible directions can be independently rotated around the shaft;
A visible angle limited display device characterized by comprising:   The visible angle restriction display device according to claim 1, wherein each of the visible angle restriction films has a visible direction that can be rotated by 90 ° about the axis.   The said connection means penetrates the said axis | shaft to the bearing slit provided in each of the said visible angle restriction | limiting film, respectively, and connects the said visible angle restriction | limiting film so that rotation is possible. Visible angle limit display device.   3. The visible angle restriction display device according to claim 1, wherein the connecting means connects each corner portion of the visible angle restriction film so as to be turned over to the shaft. 4. A visible angle limiting film structure attached to a display unit having a rectangular display screen whose one side is longer than the other,
A transparent film for covering the display screen;
Two visible angle limiting films provided on the transparent film, each having a single visible direction;
A connecting means for connecting the shafts provided at a pair of corners of the transparent film and each of the visible angle limiting films so that the respective visible directions can be independently rotated around the shaft;
A visible angle limiting film structure characterized by comprising:   6. The visible angle limiting film structure according to claim 5, wherein each of the visible angle limiting films has a visible direction that can be rotated by 90 ° about the axis.   The said connection means penetrates the said axis | shaft to the bearing slit provided in each of the said visible angle restriction | limiting film, respectively, and connects the said visible angle restriction | limiting film so that rotation is possible. Visible angle limiting film structure.   The visible angle limiting film structure according to claim 5 or 6, wherein the connecting means connects each corner of the visible angle limiting film to the shaft so as to be turned over. A portable device having a rectangular display portion with one side longer than the other,
A transparent film provided on the display unit;
Two visible angle limiting films provided on the transparent film, each having a single visible direction;
A connecting means for connecting the shafts provided at a pair of corners of the transparent film and each of the visible angle limiting films so that the respective visible directions can be independently rotated around the shaft;
A portable device comprising:   The portable device according to claim 9, wherein each of the visible angle limiting films has a visible direction that can be rotated by 90 ° around the axis.   The said connection means penetrates the said axis | shaft to the bearing slit provided in each of the said visible angle restriction | limiting film, respectively, The said visible angle restriction | limiting film is connected so that rotation is possible. Portable device.   The portable device according to claim 9 or 10, wherein the connecting means connects each corner of the visible angle limiting film to the shaft so as to be turned over.

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