JP2011154144A - Electronic equipment with stereoscopic image display function - Google Patents

Abstract

A conventional electronic device with a stereo viewer is troublesome in switching between 2D display (normal display) and 3D display (stereoscopic display), and is difficult to reduce in thickness, and is not portable.
In 2D display, a concave lens and a convex lens having the same curvature as the concave lens are arranged on the surface of the display element, and in 3D display, the convex lens is arranged at a certain distance from the concave lens. Thus, 2D display and 3D display are possible. Since the convex lens is accommodated on the display element during 2D display, a thin and highly portable electronic device with a 3D display function can be realized.
[Selection] Figure 1

Description

  The present invention relates to a display device used for a thin mobile phone, a mobile terminal, and an electronic device.

  In view of portability, a thin display element of 3 to 4 inches is used as a display element of a mobile terminal device such as a mobile phone.

  In addition, display elements have become higher in definition and can display a large amount of information. However, there is a problem that characters and images displayed on a display element of a portable terminal are too fine to be seen.

In order to reproduce a stereoscopic image (3D image) with a display element without using glasses, for example, there is a 3D display method using a parallax barrier method. (For example, Patent Document 1)
However, since a small display element such as a portable terminal has a small screen, the realism of a stereoscopic image is lost.

  A method using a stereo viewer that displays a 3D image by viewing side-by-side stereo images in which the left image of the left visual line and the right image of the right visual line are arranged side by side is known.

This method can display a realistic 3D image even with a small display element. (For example, Patent Document 2 and Patent Document 3)
FIG. 7 shows a stereoscopic (3D) photo reproduction apparatus using a conventional stereo viewer.

  A stereo photograph 18 is arranged in accordance with the photo frame 19, and the left and right images are viewed with the left and right eyes through the binocular lens 2 made up of two convex lenses 5 arranged at a distance from the photograph position, thereby enabling stereoscopic display. .

  The photographic frame 19, the arm 4, and the binocular lens 2 have a structure that can be folded by two rotating shafts, as shown in FIG.

  In addition, a method has been proposed in which a stereo image displayed on a display element is reproduced as a stereoscopic image by fixing an arm part with a binocular lens to a side surface of a display element (display) of an electronic device. (For example, Patent Document 4)

Japanese Patent Laid-Open No. 9-15532 Utility Model Registration No. 3025841 Japanese Patent Laid-Open No. 2003-228022 JP 2004-177431 A

  The electronic device having a stereoscopic (3D) image display element described in Patent Document 3 has a structure in which an arm is fixed to a housing frame around the display element, and thus portability is poor. .

  Although it is possible to remove the arm from the electronic device in order to make the electronic device easy to carry, it is necessary to carry the electronic device main body and the arm including the binocular lens separately, which is not suitable for carrying.

  In addition, electronic devices such as mobile phones and mobile terminals have many functions such as telephone calls, mails, televisions, cameras, and the like, and there are rather many functions that can be used even without stereoscopic image display (3D display). When an operation is performed on a conventional display screen (2D display) that is not a stereoscopic image, the arm gets in the way. Or, it takes time to remove the arm.

  For example, if a stereo viewer having a folding function described in Patent Documents 1 and 2 is mounted on a display element of an electronic device, it is easy to carry.

  However, since the stereo viewer described in Documents 1 and 2 has a structure in which a binocular lens is accommodated on a stereo image, an operation using a conventional display screen cannot be performed. That is, the operability of the conventional function such as e-mail becomes very poor.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to realize a thin and easy-to-carry electronic device while achieving both conventional 2D display and 3D display.

  Next, means for solving the above problems will be described.

  An electronic apparatus according to the present invention includes a rectangular first display element, a casing in which the first display element is fixed, a cover of the casing, a binocular concave lens, and a binocular convex lens having the same curvature as the binocular concave lens. In the electronic device comprising the arm means, the first display mode in which the long side of the first display element is vertical or horizontal, the arrangement in which the long side of the first display element is horizontal, and the display element is A second display mode in which a stereoscopic image is displayed by displaying the left image and the right image on the divided screen, and the arm means includes the binocular convex lens as the display element. And having a function of changing the distance between the binocular convex lens and the display element, and in the first display mode, the opposite surface of the concave portion of the binocular concave lens and the display A child plane is disposed close to the binocular convex lens, and the concave portion of the binocular concave lens and the convex portion of the binocular convex lens are disposed close to each other, and in the second display mode, the binocular convex lens is disposed on the binocular concave lens. On the other hand, they are arranged a predetermined distance apart.

  In the electronic device of the present invention, the opposite surface of the concave portion of the binocular concave lens is fixed close to the display element surface in both the first display mode and the second display mode.

  Further, in the electronic apparatus of the present invention, the binocular concave lens is composed of a concave lens and a transparent frame, the outer periphery of the concave lens and the surface of the transparent frame are connected by a smooth curved surface, and the binocular convex lens is composed of a convex lens and a transparent frame, The outer periphery of the convex lens and the surface of the transparent frame are connected by a smooth curved surface.

  In the electronic device of the present invention, the transparent frame of the binocular concave lens or the transparent frame of the binocular convex lens has a positioning projection or hole.

  In the electronic apparatus according to the present invention, in the second display mode, the binocular concave lens is separated from the display element surface and is accommodated in the arm means.

  According to the present invention, it is possible to realize an electronic device that is thin and easy to carry while achieving both 2D display and 3D display.

1 is a schematic structural diagram of a mobile terminal device according to a first embodiment of the present invention. Schematic sectional view of the mobile terminal device according to the first embodiment of the present invention. The figure which shows the distortion by the binocular concave lens of the portable terminal device of Embodiment 1 of this invention The expanded sectional view of the binocular lens of the portable terminal device of Embodiment 1 of this invention Schematic structure diagram of a mobile terminal device according to a second embodiment of the present invention. Schematic structure diagram of a mobile terminal device according to Embodiment 3 of the present invention Schematic structure diagram of a conventional stereo viewer

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a schematic structural diagram of a mobile terminal device according to the present embodiment.

  Hereinafter, the case where the present embodiment is applied to a portable terminal device will be described as an example. However, the same applies to a case where the present invention is applied to a thin electronic device having a display element such as a portable car navigation system or a television.

  As shown in FIG. 1, the portable terminal device of the present embodiment is a portable terminal device that includes a casing 1 having a display element 9 and a transparent binocular convex lens 2, and the binocular convex lens 2 is connected to a casing through arm means 4. It is bound to the body 1.

  In FIG. 1A, the long side of the display element 9 is horizontal, and the binocular convex lens 2 is disposed close to the display element 2. This is an example of a usage form of a conventional portable terminal device, and will be referred to as a first form.

  A usage form in which information is displayed in a state where the long side of the first display element is vertically oriented is also possible, and this is also included in the first form.

  In the first embodiment, the display element displays information using a vertically or horizontally oriented screen as in the prior art. This is called the first display mode or normal display (2D display).

  On the other hand, as shown in FIG. 1 (2), the binocular convex lens 2 and the display element 9 are arranged in parallel at a predetermined distance. This is called the second form.

  In the second embodiment, the display element 9 is divided into two screens, a left screen 11 and a right screen 10, and a left eye image and a right eye image are displayed respectively on the left and right. This is called the second display mode or stereoscopic display (3D display). The binocular lens is composed of two convex lenses, and a user can reproduce a stereoscopic image (3D image) by viewing the left screen and the right screen with the left and right eyes, respectively.

  The arm means is composed of a hinge 7 and an arm component 8, and the first form and the second form can be realized by expanding and contracting the arm means.

  By adjusting the distance between the binocular convex lens and the display element by the arm means, it is possible to display at a magnification that is easy for the user to see.

  Here, the arm means composed of the hinge and the arm has been described, but any other arm means having an expansion / contraction function may be used.

  FIG. 2A is a cross-sectional view of the mobile terminal device according to the first embodiment. A transparent binocular concave lens 3 is fixed on the display element 9 so that the concave portion of the concave lens faces outside. Further, the binocular convex lens 2 is overlaid on the binocular concave lens 3 so that the convex part of the convex lens faces down. The binocular convex lens 2 and the binocular concave lens 3 have substantially the same curvature and size, and can be stacked without a gap as shown in FIG.

  At this time, since the condensing function of the concave lens and the convex lens is canceled, the image of the display element 9 can be displayed without distortion.

  On the other hand, FIG. 2 (2) shows a cross-sectional view of the portable terminal in the second embodiment.

  The binocular convex lens 2 is arranged parallel to the display element at a certain distance from the display element 9. Since the binocular concave lens 3 is fixed immediately above the display element 9, the magnification (condensing) function of the concave lens is almost lost, and the magnification (condensing) function of the binocular convex lens 2 becomes dominant.

  As shown in the enlarged cross-sectional view of FIG. 3, the image lens 14 is slightly left at the end away from the center of the concave lens 6, but the concave lens used in the present embodiment has a low magnification. Is a few tens of microns at most, so there is almost no problem in practical use.

  FIG. 4 is a cross-sectional view of the binocular concave lens 3 and the binocular convex lens 2. The binocular concave lens 3 (or binocular convex lens 2) includes a concave lens 6 (or convex lens 5) and a transparent frame 15.

  The transparent frame 15 and the end (dotted line) of the concave lens are connected by a smooth curve as shown in the figure. Similarly, the transparent frame 15 and the end portion (dotted line portion) of the convex lens are connected by a smooth curve. Thereby, in the first embodiment, the boundary line between the transparent frame 15 and the concave lens can be made less noticeable.

  Furthermore, as shown in FIG. 4, the transparent frame of the binocular concave lens 3 has a concave portion 16, and the transparent frame on the opposite side of the binocular convex lens 2 has a convex portion 17 having the same shape as the concave portion. When the concave portion 16 and the convex portion 17 overlap with each other, the binocular concave lens and the binocular convex lens can be easily overlapped at an accurate position.

  A plurality of concave portions and convex portions may be provided as shown in FIG. Further, the recess may be a hole.

The binocular convex lens 2 has the following three functions.
(1) The left and right screens displayed on the first display element 9 are viewed separately.
(2) Enlarge the screen display.
(3) Focus can be achieved even when the distance between the user's eyes and the left and right screens is short. Therefore, the ratio (viewing angle) of the screen to the user's field of view can be increased.

  In the display in the first form of the conventional portable terminal having a display screen of about 3 inches, it is often used in the state where the distance between the user's eyes and the screen is about 20 cm. At this time, the viewing angle is about 20 degrees.

  On the other hand, in the 3D display mode of the second form, as shown in FIG. 2 (4), it becomes possible to focus at a short distance by using a convex lens for the binocular lens 6, so that the distance between the user's eyes and the screen is reduced. It can be as small as 10 cm. As a result, the viewing angle becomes 40 degrees or more, and a realistic 3D image (video) can be obtained.

  Note that the magnification of the convex lens is several times that used in a magnifying glass or the like, that is, a low magnification having a focal length of about 5 cm to 15 cm. If the magnification is increased too much, the left and right screens do not fit in the entire field of view, and only a part of them can be seen, and the pixel roughness becomes conspicuous. Conversely, if the magnification is too small, it becomes difficult to focus unless the distance between the user and the screen is increased, and the viewing angle becomes small.

  The convex lens or concave lens may be a normal glass or transparent resin lens, but it is also possible to use a Fresnel lens concave lens and convex lens.

  Further, by displaying the same image on the left screen 11 and the right screen 10 and viewing using the binocular lens for 3D display, an enlarged display of the 2D image can also be realized.

As described above, the portable terminal device according to the first embodiment can realize a thin electronic device while achieving both conventional 2D display and 3D display.
(Embodiment 2)
FIG. 5 is a schematic structural diagram of the mobile terminal device according to the second embodiment.

  The major difference from the first embodiment is the structure of the binocular concave lens and the arm means, and the description of other parts similar to those of the first embodiment is omitted.

  FIG. 5 (1) shows the cross-sectional structure of the mobile terminal in the first embodiment, and FIGS. 5 (2) and 5 (3) show the mobile terminal structure in the second embodiment.

  The binocular concave lens 3 is divided into two parts for the left and right sides, which are coupled to each other via an arm part 8 and a hinge 7. Further, the divided binocular concave lens 3 is coupled to the binocular convex lens 2 via a hinge 7.

  In the second embodiment, since the divided binocular concave lens 3 is accommodated in the arm means and only the binocular convex lens 2 is used, there is an advantage that the distortion of the binocular concave lens 3 as shown in FIG. 4 is eliminated.

On the other hand, since the binocular concave lens 3 is divided into two, there is a disadvantage that the boundary line is conspicuous in the first embodiment.
(Embodiment 3)
FIG. 6 is a schematic structural diagram of the mobile terminal device according to the third embodiment.

  The major difference from the first embodiment is the structure of the binocular concave lens and the arm means, and the description of other parts similar to those of the first embodiment is omitted.

  FIG. 6 (1) is a cross-sectional structure of the mobile terminal in the first embodiment, and FIGS. 6 (2) and (3) are mobile terminal structures in the second embodiment.

  Similarly to the second embodiment, the binocular concave lens 3 is divided into left and right parts, and the divided binocular concave lens 3 is coupled to the housing 1 via a hinge 7. Further, the divided binocular concave lens 3 is coupled to the binocular convex lens 2 via an arm part 8 and a hinge 7.

  In the second embodiment, since the divided binocular concave lens 3 is accommodated in the arm means and only the binocular convex lens 2 is used, the distortion of the binocular concave lens 3 as shown in FIG. 4 is eliminated.

  On the other hand, since the binocular concave lens 3 is divided into two, there is a disadvantage that the boundary line is conspicuous in the first embodiment.

  The present invention is useful as, for example, a portable terminal device, and can be used in various electronic devices such as a television, a cellular phone, a portable terminal, and a car navigation system.

DESCRIPTION OF SYMBOLS 1 Case 2 Binocular convex lens 3 Binocular concave lens 4 Arm means 5 Convex lens 6 Concave lens 7 Hinge 8 Arm component 9 Display element 10 Right screen 11 Left screen 12 Right eye 13 Left eye 14 Image shift 15 Transparent frame 16 Concave part 17 Convex part 18 Stereo photograph 19 Photograph frame

Claims (5)

In an electronic device comprising a first display element, a housing to which the first display element is fixed, a binocular concave lens, a binocular convex lens having the same curvature as the binocular concave lens, and arm means,
The arm means has a function of holding the binocular convex lens in a position parallel to the display element and changing a distance between the binocular convex lens and the display element,
The first display mode in which the opposite surface of the concave portion of the binocular concave lens and the display element surface are arranged close to each other, and the binocular convex lens is arranged close to the concave portion of the binocular concave lens and the convex portion of the binocular convex lens When,
And a second display mode in which the binocular convex lens is disposed at a predetermined distance from the binocular concave lens. 2. The electronic device according to claim 1, wherein in both the first display mode and the second display mode, an opposite surface of the concave portion of the binocular concave lens is fixed close to the display element surface. . The binocular concave lens consists of a concave lens and a transparent frame, the outer periphery of the concave lens and the surface of the transparent frame are connected by a smooth curved surface,
3. The electronic apparatus according to claim 1, wherein the binocular convex lens includes a convex lens and a transparent frame, and an outer periphery of the convex lens and a surface of the transparent frame are connected by a smooth curved surface. 4. The electronic device according to claim 1, wherein the transparent frame of the binocular concave lens or the transparent frame of the binocular convex lens has a positioning projection or a hole. 5. 6. The electronic apparatus according to claim 1, wherein, in the second display mode, the binocular concave lens is separated from the display element surface and is accommodated in the arm means.

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