JPH095726A - Display device - Google Patents

Abstract

(57) [Summary] [Purpose] A display configured so that the user can see the contents displayed on the screen of the display device, while the display contents cannot be seen by anyone other than the user. The purpose is to provide a device. A display device 10 including a plurality of pixels 16 arranged two-dimensionally, and configured to display a desired image on the basis of a predetermined signal being applied to each of the plurality of pixels 16. . This device comprises a lens 18 corresponding to each pixel 16, the lens 18 being sufficient for viewing the image formed by the pixel 16 when the user views the pixel 16 binocularly, and Others are configured to limit the viewing angle of the pixels so that no one can place the viewpoint therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a display device suitable for mounting on a portable information device such as an electronic notebook.

[0002]

2. Description of the Related Art In recent years, in response to a demand for miniaturization, a display device, in particular, a portable information device such as an electronic notebook, that is, a display device mounted on a portable information device has a liquid crystal element or a plasma display. There are many things that use such as.

In such a display device, a proposal has been made to add a microlens to a pixel constituting a liquid crystal display device or a plasma display for the purpose of brightening the display.

[0004]

By the way, the portable information device may be used not only in the office but also during or while the user is moving from the office to another place. Therefore, in the environment where many strangers are around the user of the device, the display device of the information device causes
There may be a case where information related to the user is displayed. In such cases, information related to the user
It is preferable to keep it unknown to strangers around you.

In addition, even in devices other than portable information devices equipped with a display device, it is often preferable that a user other than the user cannot see the image displayed on the display device.

[0006] However, for the display device used for the conventional portable information equipment, although a technique for expanding the viewing angle has been proposed, the information is disclosed only to the user, and a stranger in the surroundings is disclosed. The information is not kept secret from the public.

The present invention aims to provide a display device in which the user can easily see the display contents of the display device, while the users other than the user cannot see the display contents. To aim.

[0008]

An object of the present invention is to display a desired image based on the fact that a plurality of pixels arranged two-dimensionally are provided and a predetermined signal is given to the plurality of pixels. And a lens corresponding to each of the pixels, wherein the lens is formed by the plurality of pixels when a user of the display device views the plurality of pixels with both eyes. Is configured to limit the viewing angle of the pixel so that no one other than the user is able to place a viewpoint therein, which is sufficient to see the image being displayed. Achieved by a display device.

In a preferred embodiment of the present invention, the diameter of the pixel is W1 between the pixel and the corresponding lens, and the distance between the surface of the pixel and the action center point of the corresponding lens is set to W1. d1, when the distance between the action center point and the user's eye is L1, it is configured to satisfy the condition defined by W1 / d1 ≦ 18 / L1.

In a further preferred aspect of the present invention, the diameter of the pixel is W1 between the pixel and the corresponding lens, and the distance between the surface of the pixel and the action center point of the corresponding lens. Where d1 is 0.14 ≦ W1
It is configured to satisfy the condition defined by /d1≦0.6.

In a further preferred aspect of the present invention, the lens includes a plurality of first cylindrical lenses each formed in a row corresponding to a first direction of the plurality of two-dimensionally arranged pixels. Has been done.

[0012] In a further preferred aspect of the present invention, each of the first cylindrical lenses has a pixel diameter W2, and a distance from a surface of the pixel to a corresponding action center point of the first cylindrical lens. Is set to d2, it is configured to satisfy the condition defined by W2 / d2 ≦ 0.6.

In a further preferred aspect of the present invention, the lens further includes a plurality of second cylindrical lenses formed in a second direction orthogonal to the first direction.

[0014] In a further preferred aspect of the present invention, each of the second cylindrical lenses has a diameter of the pixel of W3, and a distance from a surface of the pixel to a corresponding action center point of the second cylindrical lens. Is set to d3, it is configured to satisfy the condition defined by W3 / d3 ≦ 0.6.

In a further preferred aspect of the present invention, each of the pixels is formed to have a horizontal length longer than a vertical length viewed from an observer.

In a further preferred aspect of the present invention, the lens is further moved in a direction perpendicular to the surface of the pixel so as to adjust the distance from the surface of the pixel of the display device to the corresponding lens. A distance adjusting means is provided.

In a further preferred aspect of the present invention, the lens is further moved in a direction parallel to the surface of the pixel so as to adjust the distance from the surface of the pixel of the display device to the corresponding lens. The optical axis adjusting means is provided.

[0018]

According to the present invention, the lens allows the viewing angle of the pixel to be seen when the user views the image with both eyes.
On the other hand, since it is restricted so that a person other than the user cannot put his point of view in the user, the user should not show the image displayed on the display device to the people around the user. It becomes possible to do.

According to a preferred embodiment of the present invention, the distance between the pixel and the corresponding lens is W1 / d1≤18 / L1.
Therefore, the range in which the pixels forming the display device can be seen at a position approximately L1 away from the display device is less than or equal to 18 cm, which is the width of the head of a general user. Therefore, when the display device is separated from the general user by L1, the user can see the image displayed on the display device, while those around the user can see the image. It becomes possible not to see.

According to a further preferred embodiment of the present invention, the distance between the pixel and the corresponding lens is 0.14 ≦ W1 /
Since it is defined by d1 ≦ 0.6, when the display device is separated from a general user by a predetermined distance included in the range of 30 cm to 45 cm, the user displays an image displayed on the display device. Can be seen, while those around the user can be prevented from seeing the image.

According to a further preferred embodiment of the present invention, the cylindrical lenses arranged in a row corresponding to the first direction of the plurality of pixels can be manufactured more easily by extrusion molding, The device can be manufactured easily and the manufacturing cost can be reduced.

According to a further preferred embodiment of the present invention, two horizontal directions of the device are provided by cylindrical lenses formed in the first direction and the second direction, respectively.
That is, since the viewing angles in the horizontal direction and the vertical direction are respectively limited, the user can view the displayed image on the display device which is easy to manufacture and whose cost is reduced. It is possible to prevent people around the person from seeing the image more reliably.

According to a further preferred embodiment of the present invention, the distance from the surface of the pixel of the display device to the corresponding lens can be adjusted by the distance adjusting means, so that the user can adjust the distance depending on the situation in which the display device is used. By adjusting this distance, it is possible to surely create a state in which people around the user cannot see the image.

According to a further preferred aspect of the present invention, since the lens can be moved in the direction parallel to the surface of the pixel by the optical axis adjusting means, the user can display on the display device from a desired position. It is possible to see the displayed image.

[0025]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a partial schematic perspective view of a display device according to the present embodiment. As shown in FIG.
The display device 10 includes a display device body 12 and a lens unit 14. In this embodiment, the display device 10 can be attached to a portable information device 15 such as an electronic notebook as shown in FIG.

In the display device main body 12, a plurality of pixels 16 which are two-dimensionally spaced from each other are formed. Pixel 16
Each of which is formed of a liquid crystal element, and an electrode is formed on each surface of the pixel 16 to transmit a light beam based on a voltage applied from a liquid crystal drive circuit (not shown) of the portable information device. It is either in a state of obtaining or a state of not transmitting. The liquid crystal element of each pixel 16 is
By being in one of the two states described above, it is possible to form a certain image on the display device 10 as a whole. In the present embodiment, for example, this pixel 16
Each has a square shape with a side of about 30 μm, and adjacent pixels are separated by about 60 μm.

In the display device main body 12, at the above-mentioned intervals,
With 640 pixels arranged in the horizontal direction and 480 pixels arranged in the vertical direction, the display device body 12 as a whole has a width (that is, the α direction in FIG. 2) of about 96 mm × a length (that is, the β direction of FIG. 2) of about 72.
mm.

A plurality of lenses 18 are formed in the lens portion 14. FIG. 3 is a partially enlarged schematic sectional view of the display device according to the present embodiment. As shown in FIG. 3, the lens 18 is a microlens having a positive refractive power, and is formed so as to face the pixel 16 of the display device body 12. The optical axis of this lens 18 is the display device main body 1
It is perpendicular to the surface of the second lens 18, and the optical axis of each lens 18 passes through substantially the center of the pixel 16 facing the lens 18.

In the present embodiment, the diameter of the pixel 16 is
And, the distance between the surface of the pixel 16 and the center point of the refraction action of the corresponding lens 18, that is, the action center point (the apex of the lens 18 in this embodiment) is defined by the following equation (1). Is preferred.

W1 / d1 ≦ 18 / L1 (1) where W1 is the diameter of the pixel 16, d1 is the distance between the surface of the pixel 16 and the corresponding action center point of the lens 18, and L1
Is the distance between the center of action and the user's eye.

Further, in the present embodiment, the diameter of the pixel 16 and the distance between the surface of the pixel 16 and the corresponding action center point of the lens 18 are defined by the following equation (1) '. Is more preferable.

W1 / d1 ≦ 0.6 (1) ′ Thus, the diameter of the pixel 16 and the distance between the surface of the pixel 16 and the corresponding action center point of the lens 18 are defined. The reason for this is explained below.

When the user wants to see the image displayed on the display device according to the present embodiment mounted on the portable electronic device, the user makes his face parallel to the surface of the display device. In many cases, the portable electronic device is held with one or both hands. According to the above equation (1), the viewing angle of each pixel is approximately 30 degrees, and the display content can be viewed within a range of 30 cm from the surface of the display device, and
In a plane parallel to the surface of the display device, a region having a diameter of about 18 cm centered on the corresponding pixel is formed. That is, the user can hold the portable electronic device with one or both hands from the face.
Considering that the user can see the image displayed on the display device when held at a distance of about 0 cm, whereas the width of the human head is generally about 18 cm,
The light emitted from the display device is blocked by the user's head, and as a result, a person located on the side or rear of the user cannot see the image displayed on the display device.

As described above, in this embodiment, the user adjusts the diameter of the pixel and the distance between the surface of the pixel and the action center point of the lens so that the user can display the image displayed on the display device. While the user can see the image, a person located beside or behind the user can be prevented from seeing the image displayed on the display device.

The lens portion 14 of the display device 10 according to this embodiment can be formed on the display device main body 12 by using photolithography technology.

Further, by making the focal length of the lens 18 equal to the distance between the surface of the pixel and the corresponding action center point of the lens, the line of sight of the user is focused on the surface of the pixel 16. As a result, the change in the visibility of the display near the viewing angle can be suddenly changed. That is,
When the line of sight of the user is slightly deviated from the optical axis of the light emitted from the pixel of the display device, the user cannot see the image displayed on the display device. On the other hand, as the focal length of the lens 18 is made larger or smaller than the distance between the surface of the pixel and the corresponding action center point of the lens, the change in the visibility of the display near the viewing angle is more gradual. Can be

In the above example, W1 / d1
Although only the upper limit of the value is limited, in the present embodiment in which the display device is mounted on the portable electronic device, it is more preferable to define the upper limit and the lower limit of this value as in the expression (1) ". .

0.14 ≦ W1 / d1 ≦ 0.6 (1) ”At the lower limit of W1 / d1, the user can see the display contents of the display device on the surface of the display device. To 4
Within a plane parallel to the surface of the display device and separated by 5 cm, it becomes a region having a diameter of approximately 6.5 cm with the corresponding pixel as the center. This corresponds to the distance between the two eyes of a typical user. That is, the user can see the image from the surface of the display device by 45c
When separated by m, the user can see the image displayed on the display device with both eyes.

Next, a description will be added to the second embodiment of the present invention. FIG. 4 is a partial cross-sectional perspective view of the display device according to the second embodiment of the present invention.

As shown in FIG. 4, the display device 30 has
Similar to the first embodiment shown in FIG. 1, the display device main body 32,
And a lens unit 34.

In the display device main body 32, a plurality of pixels 36 which are two-dimensionally spaced from each other are formed. Pixel 36
Each is formed of a liquid crystal element.

The lens portion 34 is a so-called lenticular lens, and of the plurality of pixels 36 arranged in a two-dimensional manner, a plurality of cylindrical lenses 38-1 and 38- are arranged so as to correspond to a certain row of pixels. 2, 38-3
It is composed of In the present embodiment, each cylindrical lens 38 is in the vertical direction when viewed from the user when the user holds the portable electronic device, that is, β in FIG.
It is provided toward the direction.

This cylindrical lens 38-1, 38
Each of -2 and 38-3 is a convex lens having a positive refracting power, and the surface showing the optical axis of each of the cylindrical lenses is
It is perpendicular to the surface of the display device body 32. Further, in the present embodiment, the diameter of the pixel 36 and the distance between the surface of the pixel 36 and the corresponding center line of refraction of the cylindrical lens 38 (the ridgeline of the cylindrical lens in the present embodiment) are , Is defined by the following equation (2).

W2 / d2 ≦ 0.6 (2) Here, W2 is the diameter of the pixel 36, and d2 is the pixel 3
6 is the distance between the surface of No. 6 and the center line of refraction of the corresponding cylindrical lens 38.

By thus defining the diameter of the pixel and the predetermined distance, the viewing angle in the lateral direction of the display device according to the present embodiment mounted in the portable information device, that is, the α direction in FIG. However, when the user holds the portable electronic device with one or both hands at a distance of about 30 cm from the face, the user can see the image displayed on the display device. Of the light emitted from the display device, the light emitted laterally from the device is blocked by the user's head, and as a result, the person located on the side of the user is displayed on the display device. You cannot see the image. In this embodiment, since only the horizontal viewing angle of the display device is limited, the vertical viewing angle is not limited at all,
As a result, a person in front of the user can see the image displayed on the screen of the display device, but in general, there is little chance that another person in front of the user will look at the display device. The purpose of preventing others from seeing the information displayed on the screen of the display device can be sufficiently achieved.

A method of manufacturing such a display device 30 will be described below. As in the case of the first embodiment, the manufacturing method of the display device main body 32 including the liquid crystal element is exactly the same as the conventional method, and therefore the description thereof is omitted. The lens part 34 made of a lenticular lens can be formed by, for example, extruding a plastic resin or the like. Further, the display device 30 can be obtained by attaching the lens portion 34 obtained by extrusion molding to the display device main body 32.

Further, as in the first embodiment, the focal length of the cylindrical lens 38 and the distance between the surface of the corresponding pixel and the center line of the refraction of the lens are made equal to each other, so that the viewing angle is close. It is possible to make a sudden change in the visibility of the display.

According to this embodiment, by controlling the viewing angle of the display device in a specific direction, the user can see the image displayed on the display device, while the user can see the image displayed on the display device. A person located laterally or rearward can be prevented from seeing the image displayed on the display device.

Further, according to this embodiment, since the lenticular lens provided on the upper portion of the display device main body can be obtained by extrusion molding, the display device can be produced more easily at a lower cost. Become.

As in the first embodiment, it is more preferable that the upper limit and the lower limit of W2 / d2 are defined by the following equation (2) '.

0.14 ≦ W2 / d2 ≦ 0.6 (2) ′ Next, the display device according to the third embodiment of the present invention will be described. FIG. 5 is a partial sectional perspective view of a display device according to a third embodiment of the present invention. As shown in FIG. 5, the display device 50 includes a display device main body 52, a first lens portion 54, and a second lens portion 60. In the display device main body 52, as in the first and second embodiments,
A plurality of pixels 56 spaced apart from each other are formed in a two-dimensional shape.

Both the first lens portion 54 and the second lens portion 60 are lenticular lenses. The first lens unit 54 has a plurality of cylindrical lenses 58-1, 58-, which are respectively configured to correspond to a certain row of the plurality of pixels 56 arranged two-dimensionally.
2, 58-3, ... On the other hand,
The second lens unit is composed of a plurality of cylindrical lenses 62-1, 62-2, ... Which are respectively configured so as to correspond to the columns orthogonal to the above-described columns. Cylindrical lenses 58-1, 58-2, 58-3, ...
.. and 62-1, 62-2, ... are convex lenses having a positive refractive power, and the surface showing the optical axis thereof is
Each is perpendicular to the surface of the display device main body 52.

The first lens portion 54 and the second lens portion 60 will be described in more detail. FIG. 6 is a partial schematic perspective view of the display device main body 62 and the first lens portion 54 of the display device 60. As shown in FIG. 6, each of the cylindrical lenses 58-1 to 58-3 has protrusions 64-1, 64-2, 64 at the ends in the short side direction.
-3, ... Are formed. For example, the protrusion 64
-1, 64-2 extend from one end of the cylindrical lens 58-2 in the long side direction to the other end. The height of each of the protrusions 64-1, 64-2, ... Is constant and equal to each other. Therefore, the protrusion 6
4-1, 64-2, ... Top surfaces 66-1, 66-2,
Are parallel to the surface of the display device main body 52. The distance between the top surface of the protrusion and the surface of the display device body 52 is equal to or slightly larger than the distance between the ridgeline of the cylindrical lens and the surface of the display device body 52. ing. That is, the protruding portions 64 of the cylindrical lenses 58-1, 58-2, ...
-1, 64-2, ... function as a support portion of the second lens portion 68, and the top surfaces 66-1, 66-2, ...
It serves as a support surface for the second lens portion 68.

FIG. 7 is a partial schematic perspective view of the second lens portion. As shown in FIG. 7, the bottom surface 68 of the second lens portion 60 is flat. Therefore, the protruding portions 64-1 and 64- of the cylindrical lenses 58-1, ...
The top surfaces 66-1, 66-2, ... Of 2, ... And the portion of the bottom surface 68 facing the top surfaces 66-1, 66-2 ,.

In this embodiment, the diameter of the pixel 56, the distance between the surface of the pixel 56 and the corresponding center line of refraction of the cylindrical lenses 58-1, ... Of the first lens portion 52. , And the surface of the pixel 56 and the cylindrical lens 62- of the second lens unit 60 corresponding thereto.
The distances to the center lines of refraction action 1 (..., In this example, the ridgelines of the respective cylindrical lenses) are defined by the following equations (3) and (4).

W3 / d3 ≦ 0.6 (3) W3 / d4 ≦ 0.6 (4) Here, W3 is the diameter of the pixel 56, and d3 and d4 are These are the distances between the surface of the pixel 56 and the center line of refraction of the cylindrical lens forming the first lens and the center line of refraction of the cylindrical lens forming the second lens portion, respectively.

By thus defining the pixel diameter and the predetermined distance, the horizontal and vertical viewing angles of the display device according to the present embodiment mounted on the portable information device are restricted, and the user can However, when the portable electronic device is held with one or both hands at a distance of about 30 cm from the face, the user can see the image displayed on the display device, while the user can see the image. The emitted light is blocked by the user's head, and as a result, a person located on the side or rear of the user cannot see the image displayed on the display device.

Similar to the second embodiment, the first lens portion 54
And the 2nd lens part 60 can be obtained by extrusion molding. In addition, the first lens portion 54 and the second lens portion 54
The lens portions 60 can be adhered to each other by using a normal method of fixing a plate-shaped optical member.

As in the first and second embodiments, the focal length of the cylindrical lens and the distance between the surface of the corresponding pixel and the center line of refraction of the lens should be the same. As a result, the change in the visibility of the display near the viewing angle can be abruptly changed.

Further, as in the first and second embodiments, W3 / d3 and W3 / d4 are set to the following (3) '.
More preferably, it is defined by the formula and the formula (4) ′.

0.14 ≦ W3 / d3 ≦ 0.6 (3) ′ 0.14 ≦ W3 / d4 ≦ 0.6 (4) ′ The human eye is Since the display device is arranged in the lateral direction, it is preferable to make the change in the visibility of the display device in the lateral direction more gentle. Therefore, in this embodiment, the cylindrical lenses 58-1, 5 of the first lens unit 54, 5
8-2, ... are configured so that the respective focal lengths and the distance between the surface of the corresponding pixel and the center line of the refracting action of the lens are the same, and these cylindrical lenses 58- , 58-2, ... have their long sides in the lateral direction when viewed from the user, that is, α in FIG.
It is provided along the direction. On the other hand, the cylindrical lenses 62-1 and 62- of the second lens unit 60 are included.
2, ... are provided so that their long sides are along the vertical direction when viewed from the user, that is, along the β direction in FIG. By configuring the first lens portion 54 and the second lens portion 60 in this way, the change in visibility in the horizontal direction can be made gentler than that in the vertical direction, and thus the user Can more appropriately see the image displayed on the display device.

Next, a description will be added to the fourth embodiment of the present invention. FIG. 8 is a schematic side sectional view of a display device according to the fourth embodiment. As shown in FIG. 8, this display device 70
Is the display device main body 72, the lens portion 74, and the surface of the pixel 76 formed on the display device main body 72 and the lens portion 74.
An interval adjusting mechanism 80 for adjusting the interval in the up-and-down direction is provided.

Like the display device main bodies 12 and 32 of the first and second embodiments, the display device main body 72 is formed with a plurality of two-dimensionally spaced pixels 76. Further, mechanism supporting portions 82-1 and 82-2 that support the space adjusting mechanism 80 are formed at both ends of the main body 72 in the long side direction. Further, slightly inward in the long side direction from the mechanism supporting portion 82, the lens portion 74 is guided so as to pass through a hole portion 84 provided in a lens portion 74 described later so that the lens portion 74 can move up and down. A guide member 86 is provided. FIG. 9 is a partial schematic cross-sectional perspective view of the display device 70. As shown in FIG. 9, guide members 86-1, 86-
Each of the two is upright from the display device main body 72. Further, the guide members 86-1 and 86-2 are the display device main body 7
They are arranged at a predetermined interval along the short side direction of 2, that is, in the β direction of FIG. Similarly, on the other end side, a plurality of guide members (not shown) are arranged at predetermined intervals along the short side direction of the main body 72.

A plurality of lenses 78 are provided in the lens section 74.
It is formed so as to face the pixel 76 of the display device main body 72. In addition, in the present embodiment, the display device main body 12
The convex surface 88 of the lens 78 is formed on the side facing the.

As shown in FIG. 8, a space 92 is provided on one end 90 of the lens portion 74 in the long side direction facing the display device main body 72.

As shown in FIGS. 8 and 9, the lens portion 7
4, corresponding to the plurality of guide members 86-1, 86-2, ... Provided in the display device main body 72, respectively.
A plurality of receiving portions 100 having an upper flange 96 and a lower flange 98 are provided. The hole portion 84 is formed in the receiving portion 100 as described above, and the hole portion 84 is
The guide member 86 penetrates.

Further, as shown in FIG.
At the end 90 of the pin 104, the pin 104 is projected so as to project in the short side direction.
Is arranged. A pin 106 is also arranged at the other end of the lens portion 74 so as to project in the short side direction.

The space adjusting mechanism 80 has a lever 108 at its lower portion, which is swingably connected to one mechanism supporting portion 82-2 via a pin 110, and the lever 108 and the mechanism supporting portion 8.
2-2, the extension portion 112 extending in the direction perpendicular to the lever 108 and the one end portion of the extension portion 112 are connected to the lever 108.
, And an arm 114 that is swingably connected via a pin 116.

The extension 112 is formed integrally with the lever 108 or is fixed to the lever 108. Further, the extension portion 112 is provided with a guide hole 118 for receiving the pin 106 provided on the lens portion 74. The guide hole 118 has a width in the short side direction that is substantially equal to the diameter of the pin 106, and has a length in the long side direction that corresponds to the vertical movement width of the lens portion 74 to be described later. .

Further, the space adjusting mechanism 80 is provided with the arm 11
The other end of 4 is provided with an L-shaped arm 120 that is swingably connected via a pin 122.

The L-shaped arm 120 has a substantially central portion,
It is rotatably connected to the mechanism support portion 82-1 via a pin 124. Further, the pin 10 provided on the lens portion 74 is provided on one linear portion of the L-shaped arm 120.
4 is provided with a guide hole 126. The guide hole 126 has a width substantially equal to the diameter of the pin 104 in the short side direction, and has a length in the long side direction corresponding to the vertical movement width of the lens 74 described later.

The operation of the display device 70 thus constructed, particularly the interval adjusting mechanism 80 will be described. When the user of the portable electronic device equipped with the display device 70 moves the lever 108 in the direction of arrow A in FIG. 8, the lever 108 rotates about the pin 110.
With the rotation of the lever 108, the extension 112 extending in the direction perpendicular to the lever 108 also rotates about the pin 110, and as a result, the guide hole 11 provided in the extension 112.
8, the pin 106 is pushed in the direction of arrow C.

On the other hand, as the lever 108 rotates,
The arm 114 connected to the lever 108 via the pin 116 moves in the arrow B direction.

As the arm 114 moves in the direction of the arrow B, the L-shaped arm 120 connected to the arm 114 via the pin 120 rotates about the pin 124, and as a result, the L-shaped arm. The pin 104 is pushed in the direction of arrow C by the guide hole 126 provided in 120.

As described above, when the pins 104 and 106 provided on the lens portion 74 are pushed in the direction of arrow C, the lens portion 74 itself moves in the direction of arrow C, that is, toward the display device main body 72. . Since the guide member 86 penetrates through the hole 102 of the receiving portion 100 formed in the lens portion 74, when the lens portion 74 moves in the direction of the arrow C, the upper flange 96 and the lower flange of the receiving portion 100. The inner peripheral surface of 98 slides along the outer peripheral surface of the guide member 86, and as a result, the distance between each part of the lens part 74 and the corresponding part of the display device main body 72 is maintained constant. . Further, since the space 92 is formed at the end portion 90 of the lens portion 74, the lens portion 74 is formed by the display device main body 72.
The mechanism support portion 82-1 is aligned with the space 92 when moved toward.

Thus, depending on the user, the lever 108
Is moved in the direction of arrow A, the lens portion 74 is moved toward the display device main body 72 while maintaining a constant distance from the display device main body 72.

On the other hand, when the user moves the lever 108 in the direction of arrow A ', the lens portion 74 is moved so as to be separated from the display device main body 72.

In this embodiment, the distance between the diameter of the pixel 76 formed on the display device main body 72 and the center point of the refraction action of the lens 78 corresponding to the surface of the pixel 76 is as follows (5). It is preferable that the range can be changed within the range defined by the formula.

0.14 ≦ W5 / d5 ≦ 0.6 (5) Here, W5 is the diameter of the pixel 76, and d5 is the pixel 7
6 is the distance between the surface of 6 and the center of refraction of the corresponding lens 78. The movable range of the lens portion 74 is defined by the guide hole 118 provided in the extension portion 112 of the lever 108 and the guide hole 126 provided in the L-shaped arm 120.

Thus, by defining the distance between the surface of the pixel 76 and the center of refraction of the corresponding lens 78, the user can see the displayed image, while The position where a state in which people around the user cannot see the image is realized is a position where the portable electronic device is separated from the face of the user by about 30 cm and a position separated by about 45 cm from the face of the user. It becomes possible to select appropriately between.

Further, according to this embodiment, the lens portion 74
Lens 78 is disposed so as to face the display device main body. Thus, for example, adjacent lenses 78
It is possible to sufficiently secure the thickness of the portion between them, and as a result, it is possible to sufficiently increase the strength of the lens portion 74.

Next, a description will be given of the fifth embodiment. FIG. 10 is a schematic side sectional view of a display device according to the fourth embodiment. As shown in FIG. 10, this display device 13
0 is the display device main body 132, the lens portion 134, and
An optical axis adjusting mechanism 140 that moves the lens unit 134 in the lateral direction with respect to the display device main body 132 is provided.

Like the display device main body 72 of the fourth embodiment, the display device main body 132 is formed with a plurality of pixels 76 that are two-dimensionally spaced from each other. Further, a mechanism support portion 142 is formed at one end portion of the display device main body 132 in the long side direction. Furthermore, slightly inside the mechanism support portion 142 and the other end portion in the long side direction of the main body 132,
A lens support portion 144 that supports the lens portion 134 is provided.

A plurality of lenses 138 are formed in the lens portion 134, as in the fourth embodiment. Further, the convex surface 146 of each lens 138 is formed on the side facing the display device body 132. Furthermore, a pin 150 is arranged at one end of the lens portion 134 in the long side direction, and slightly protrudes from the lens portion 134 in the short side direction.

The two lens support portions 144 are respectively
The display device main body 132 is arranged upright from the surface of the display device main body 132 along the short side direction. Further, the lens supporting portion 144 is provided with a lens receiving hole 148 for receiving the lens portion 134. This lens receiving hole 1
Reference numeral 48 has a length substantially equal to the length of the lens portion 134 in the short side direction, and has a thickness substantially equal to the thickness of the lens portion 134. That is, the lens portion 134 is aligned with these lens receiving holes 148.

The optical axis adjusting mechanism 140 has a lever 154 below it which is swingably connected to the mechanism supporting portion 142 via a pin 152. The guide hole 15 is provided at the substantially center of the lever 154 along the direction in which the lever 154 extends.
6 are provided. The guide hole 156 has a width in the short side direction that is substantially equal to the diameter of the pin 150, and has a length in the long side direction that corresponds to the lateral movement width of the lens portion 134 described later. .

The operation of the display device 130 thus configured, particularly the optical axis adjusting mechanism 140, will be described.

The lever 154 is moved by the user of the portable electronic device equipped with the display device 130 by the arrow D in FIG.
When moved in the direction, the lever 154 swings about the pin 152. Along with the swing of the lever 154, the guide hole 156 provided substantially in the center of the lever 154 causes the pin 150 to move.
Is pushed in the direction of arrow E, and as a result, the lens unit 134 moves in the direction of arrow E.

Since the lens portion 134 is aligned with and supported by the lens receiving hole 148 provided in the lens supporting portion 144, it slides along the inner peripheral surface of the lens receiving hole 148.
It can move in the direction of arrow E in parallel with the display device main body 132. The lateral movement range of the lens portion 134 is defined by the guide hole 156 of the lever 154.

In the present embodiment, this lateral movement range is larger than the length of one pixel on the left and right shown in FIG. 10 because the center of the pixel 136 and the optical axis of the corresponding lens 138 coincide with each other. It is preferably small.

As described above, since the lens 138 can be moved laterally from the position where the center of the pixel 136 and the optical axis of the corresponding lens 138 coincide with each other, the user can move the optical axis of the lens to the optical axis of the lens 138. It is possible to view the image displayed on the display device from a desired position without having to move the face to view the image so as to substantially match, that is, parallel to the surface of the display device main body 172.

Further, similarly to the fourth embodiment, according to this embodiment, the lens 138 of the lens portion 134 is arranged so as to face the display device main body. Therefore, for example, the thickness of the portion between the adjacent lenses 138 can be sufficiently ensured, and as a result, the strength of the lens portion 134 can be sufficiently increased.

Next, an example in which the display device according to the present invention is mounted on a device other than a portable information device will be described.

FIG. 11 is an external perspective view of a television (TV) telephone equipped with the display device according to the present invention. FIG.
As shown in, the TV phone 1000 includes a TV phone body 1002, a camera 1004 for taking a picture of the face of the user of the TV phone, and a face of a call partner taken by a camera of the TV phone of the other party who is talking. The display device 1006 and the handset / handset 1008 for displaying The TV phone body 1002 is provided with an input device including a numeric keypad (not shown), a receiver, a transmitter, an image processing device for generating image data to be given to a display device, and the like.

In this embodiment, the display device 1006 has substantially the same structure as the display device 10 described in the first embodiment. Further, the display device 1006 is arranged such that the center line 1010 of its field of view is substantially aligned with the optical axis 1012 of the camera 1006. Further, the diameter of the pixel (not shown) of the display device 1006 and the distance between the pixel and the lens (not shown) corresponding to the pixel are defined as in the first embodiment.

The TV phone 1000 configured in this way
At this time, when the user positions his / her face at a position separated from the display device 1006 by a predetermined distance in order to see the image displayed on the screen of the display device 1006, the camera 10
06 will be able to shoot just the face of the user. That is, the user simply keeps his / her face in a position where the image displayed on the screen of the display device 1006 can be seen, and the camera 1006 appropriately captures the face of the user. , The TV phone body sends an image corresponding to this to the TV phone of the other party who is talking, and the image is displayed on the screen of the display device of the other party's TV phone.
It becomes possible to display the image.

According to this embodiment, the user is the TV of the other party.
You can use a videophone without having to pay attention to whether your face is properly displayed on your phone.

The present invention is not limited to the above examples, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. It goes without saying that it is one.

For example, in the above-described embodiment, the pixels formed on the display device main body are square, but the present invention is not limited to this, and as shown in FIG. The length Wv in the vertical direction may be smaller than the length Wh in the horizontal direction. In a display device including such a pixel, three pixels arranged in the vertical direction are set as one set, and three signals for forming a color image are given to each of the three pixels forming each set. By
A color image can be displayed on the screen of the display device. Moreover, since the length in the vertical direction is smaller than the length in the horizontal direction, it is possible to display a color image without increasing the size of the entire display device.

Further, in the first to third embodiments, it is obvious that the lens portion may be arranged so that the convex surface of the lens faces the display device main body. On the other hand, in the fourth and fifth embodiments, it is clear that the lens portion may be arranged so that the convex surface of the lens does not face the display device main body.

Further, the relationship between the diameter of the pixel defined in the above embodiment and the distance between the surface of the pixel and the refraction point of action of the lens or the line of action can be changed according to the device on which the display device is mounted. It is clear that there is. For example, when the display device according to the present invention is mounted on an ATM device used in a bank or the like, the distance between the surface of the display device and the face of the user is smaller than the distance specified in the above embodiment. Therefore, it is preferable to set the relationship so as to narrow the viewing angle. Even when the display device according to the present invention is mounted on the portable electronic device, the diameter of the pixel defined in the above embodiment and the distance between the surface of the pixel and the refractive action point or the action line of the lens. It is clear that the relationship with and need not be limited to those described in this example. For example, in the case of a display device that displays information with relatively low confidentiality, the upper limit of W1 / d1 defined in the above embodiment may be larger than 0.6.

Further, in the above-described embodiment, the pixels formed of the liquid crystal element are formed in the display device main body, but the present invention is not limited to this. For example, the pixels formed of the plasma element are formed in the display device main body. Obviously, it may be formed.

Further, in the above-mentioned embodiment, each of the lenses provided in the lens portion is configured such that its optical axis is perpendicular to the surface of the display device main body. Any position included in the distance between the user and the display device when viewing the image displayed on
For example, in the above embodiment, 30 cm to 45 cm
The optical axes of the lenses may be aligned at any position included in cm. In this case, since the optical axis of each lens is concentrated at the position where the user views the image displayed on the display device, people around the user may see the image displayed on the display device. It will be difficult.

Further, in the present specification, the term "means" does not necessarily mean physical means, but also includes the case where the function of each means is realized by software. Further, the function of one means may be realized by two or more physical means, or the functions of two or more means may be realized by one physical means.

[0105]

According to the present invention, the user can see the contents displayed on the screen of the display device, while the users other than the user cannot see the contents. It is possible to provide an improved display device.

[Brief description of drawings]

FIG. 1 is a partial schematic perspective view of a display device according to a first embodiment of the present invention.

FIG. 2 is an external view of a portable electronic device equipped with a display device according to an embodiment of the present invention.

FIG. 3 is a partially enlarged schematic cross-sectional view of the display device according to the first example.

FIG. 4 is a partial schematic cross-sectional perspective view of a display device according to a second embodiment of the present invention.

FIG. 5 is a partial schematic perspective view of a display device according to a third embodiment of the present invention.

FIG. 6 is a partial schematic cross-sectional perspective view of a display device main body and a first lens portion according to a third embodiment.

FIG. 7 is a partial schematic cross-sectional perspective view of a second lens portion of the third embodiment.

FIG. 8 is a schematic side sectional view of a display device according to a fourth embodiment of the present invention.

FIG. 9 is a partial schematic perspective view of a display device according to a fourth embodiment.

FIG. 10 is a schematic side sectional view of a display device according to a fifth embodiment of the present invention.

FIG. 11 is an external perspective view of a television (TV) telephone equipped with the display device according to the present invention.

FIG. 12 is a partial schematic cross-sectional perspective view of a display device according to still another embodiment of the present invention.

[Explanation of symbols]

 10 display device 12 display device main body 14 lens part 16 pixels 18 lens

Claims (10)

[Claims] 1. A display device including a plurality of pixels arranged two-dimensionally, the display device being configured to display a desired image based on a predetermined signal being applied to the plurality of pixels, A lens corresponding to each of the pixels, the lens being sufficient for viewing an image formed by the plurality of pixels when a user of the display device views the plurality of pixels with both eyes. The display device is configured to limit the viewing angle of the pixel so that a person other than the user cannot place a viewpoint therein. 2. The diameter of the pixel is W1, the distance between the surface of the pixel and the action center point of the corresponding lens is d1, and the action center point is between the pixel and the corresponding lens. The display device according to claim 1, wherein a condition defined by the following equation is satisfied when a distance between the user and the eyes is L1. W1 / d1 ≦ 18 / L1 3. When the diameter of the pixel is W1 between the pixel and the corresponding lens and the distance between the surface of the pixel and the action center point of the corresponding lens is d1, the following is obtained. 3. The condition as defined by the formula is satisfied.
The display device according to claim 1. 0.14 ≦ W1 / d1 ≦ 0.6 4. The lens is composed of a plurality of first cylindrical lenses formed in a row corresponding to the first direction of the plurality of pixels arranged in two dimensions. The display device according to claim 1, wherein: 5. When each of the first cylindrical lenses has a diameter of the pixel of W2 and a distance from the surface of the pixel to a corresponding action center point of the first cylindrical lens is d2, The display device according to claim 4, wherein the display device satisfies the condition defined by the formula. W2 / d2 ≦ 0.6 6. A plurality of second lenses, each of which is formed in a second direction orthogonal to the first direction.
The display device according to claim 4, further comprising: a cylindrical lens. 7. When each of the second cylindrical lenses has a diameter of the pixel of W3 and a distance from a surface of the pixel to a corresponding action center point of the second cylindrical lens is d3, The display device according to claim 2, wherein a condition defined by the formula is satisfied. W3 / d3 ≦ 0.6 8. The pixel according to claim 1, wherein each of the pixels is formed to have a horizontal length longer than a vertical length viewed from an observer. Display device described. 9. Further, in order to adjust the distance from the surface of the pixel of the display device to the corresponding lens,
9. The display device according to claim 1, further comprising a distance adjusting unit that moves the lens in a direction perpendicular to the surface of the pixel. 10. An optical axis adjusting means for moving the lens in a direction parallel to the surface of the pixel so as to adjust the distance from the surface of the pixel of the display device to the corresponding lens. The display device according to claim 1, wherein the display device is a display device.