JP2007199295A - Display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display which enables an observer to smoothly move a view point to the display from a photographing object or the like. <P>SOLUTION: The display for letting the observer recognize an image enables the observer to smoothly move the view point to the display from the photographing object or the like by letting the observer recognize the photographing object by either the right eye or the left eye. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device that allows an observer to recognize an image.

  Conventionally, various display devices such as a cathode ray tube (CRT), a liquid crystal (LCD), an organic EL (electroluminescence), a rear pro (rear projection), and a plasma are known. Among these, LCDs are widely used as small display devices for portable use, and organic EL displays are also being used.

  These display devices include devices such as mobile phones, digital still cameras (DSC), digital video cameras (DVC), etc. that are mainly operated while being held by hand, car navigation systems, desktop personal computers, laptop computers, portable DVD players, etc. It is mounted on personal devices, etc. of the type that is mainly fixed during use.

  In addition, in a head-up display where the actual display is displayed on the windshield glass of the vehicle, the display position is required to be positioned forward to some extent in accordance with the driver's viewpoint, and is projected onto the windshield glass. This is achieved by increasing the length of the optical path.

  On the other hand, as a display device, a 3D display device in which a left-eye image entering the left eye and a right-eye image entering the right eye are differentiated and the two images are combined to be recognized as a stereoscopic image is proposed in Patent Document 1 and the like. Yes. According to such a 3D display device, it is possible to display an image that protrudes from the screen and to enjoy a realistic image.

Japanese Patent No. 3096613

  Here, in an apparatus of a type that is mainly photographed while being held by hand, such as a digital still camera (DSC), a digital video camera (DVC), etc., the user (observer) is in the apparatus while looking at an object to be photographed. When looking at the mounted display, it is difficult to move the viewpoint.

  In addition, in the above-mentioned head-up display, there is a demand to display an image far away from the driver in order to minimize the movement of the viewpoint during driving. For this purpose, the optical path length to the windshield glass is increased. There must be.

  The present invention is a display device that allows an observer to smoothly move the viewpoint from a photographing object or the like to the display device.

  The present invention is a display device that causes an image to be recognized by either the left eye or the right eye of an observer.

  Further, the present invention is a display device capable of switching between a case where an image is recognized by one of the left eye and the right eye of an observer and a case where an image is recognized by both eyes of the observer. .

  Further, the present invention can switch between a case where the image is recognized by the observer's left eye, a case where the image is recognized by the observer's right eye, and a case where the image is recognized by both eyes of the observer. It is a display device.

  The display device is preferably a liquid crystal display device.

  The display device preferably includes a directional backlight.

  The display device preferably includes a display and a lenticular lens between the display and the directional backlight.

  The display device preferably includes a display, and a switch liquid crystal is disposed on a front surface of the display.

  In the display device, display is preferably performed using linearly polarized light.

  In the display device, it is preferable that display is performed using circularly polarized light.

  In the display device, the display device is preferably mounted on a digital video camera.

  In the display device, it is preferable that the display device is mounted on a digital still camera.

  In the display device, it is preferable that the display device is mounted on a head-up display device in which an actual display display is displayed on a windshield glass of a vehicle.

  In the present invention, in a display device that allows an observer to recognize an image, either the left eye or the right eye of the observer recognizes the image so that the observer can view the viewpoint from the object to be captured to the display device. Can be moved smoothly.

  Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a conceptual configuration diagram illustrating the display principle of the present embodiment. A video corresponding to the video signal is displayed on the display 10 of the display device. In this example, the display device is a liquid crystal display device (LCD), and displays a video signal composed of an image signal for each pixel for each pixel arranged in a matrix. Each pixel is composed of pixels such as RGB or RGBW, and display is performed by controlling voltage application to the liquid crystal for each pixel. The display device is preferably a liquid crystal display device from the viewpoint of portability and the like, but any conventionally known display device such as an organic EL display device, a CRT, a rear projector, or a plasma display device may be used. Good.

  On the display 10 of this display device, an image is recognized by either the left eye or the right eye of the observer 14. At this time, since the image is recognized by either the left eye or the right eye of the observer 14 (the right eye of the observer 14 in FIG. 1), the image displayed on the display 10 is shown in FIG. When there is a viewpoint of the observer 14 at the photographing object or the position 12 viewed during driving, the observer 14 is conscious of moving the viewpoint from the photographing object or the position 12 viewed during driving. An image recognized immediately after working or immediately after the observer 14 moves the viewpoint is as shown in FIG. That is, the image recognized by the observer 14 becomes clear immediately after the observer 14 is conscious of moving the viewpoint from the photographing object 12 or the like or immediately after the viewpoint is moved.

  In the present embodiment, the display 10 displays either a left-eye image entering the left eye or a right-eye image entering the right eye. Therefore, when the left-eye image is displayed on the display 10, it is recognized by the left eye of the observer 14, and when the right-eye image is displayed, it is recognized by the right eye of the observer 14. Thus, the viewpoint can be smoothly moved by recognizing the image with either the right eye or the left eye of the observer 14.

  On the other hand, on the display 20 of the conventional display device, as shown in FIG. 3, both the left eye and the right eye of the observer 14 are made to recognize images. At this time, the image displayed on the display 20 is as shown in FIG. 4 (a). When the observer 14 has a viewpoint at the position 12 or the like being viewed during the photographing object or driving, the image is viewed during the photographing object or driving. The image recognized immediately after the observer 14 is aware of moving the viewpoint from the position 12 or the like being moved, or immediately after the observer 14 moves the viewpoint, becomes a blurred image as shown in FIG. . After a consciousness of changing the viewpoint works on the observer 14, or after the observer 14 moves the viewpoint, when a certain time (about 1 second) elapses, it is recognized as a clear image as shown in FIG. Become so.

  This is because when the image is recognized by both the left eye and the right eye of the observer 14, the convergence angle changes.

  In the display device according to the present embodiment, it is possible to switch between the case where the image is recognized by either one of the left eye or the right eye of the observer and the case where the image is recognized by both eyes of the observer. Preferably there is. In addition, it is preferable to be able to switch between the case where the left eye of the observer recognizes the image, the case where the image is recognized by the right eye of the observer, and the case where the image is recognized by both eyes of the observer. Accordingly, there is an advantage that excellent display performance can be realized even when viewing normally other than during shooting or driving. This switching may be performed by the user using a switching knob or the like provided on the display device.

  As described above, in this embodiment, the observer can smoothly move the viewpoint from the object to be captured to the display of the display device by causing the observer to recognize the image with either the left eye or the right eye. Can be done.

  The display device according to the present embodiment is preferably mounted on a vehicle head-up display device in which an actual display display is displayed on the windshield glass of the vehicle. As a result, when the position viewed during driving and the display of the display device are viewed alternately, the recognized image is hardly blurred even when the viewpoint is shifted to the display, and a more comfortable display is possible. Further, it is not necessary to increase the optical path length to the windshield glass in order to minimize the viewpoint movement during driving.

  As shown to Fig.5 (a), the display 10 of the display apparatus of this embodiment is installed in front of the windshield glass 24 of a vehicle. For example, the position may be relatively close to the windshield glass 24 such as on or inside the dashboard. Then, the left-eye image or the right-eye image is displayed on the display 10 of the display device as described above. As a result, the virtual image 26 of the display 10 is displayed behind the windshield glass 24 as viewed from the observer side. This virtual image 26 is substantially the same as the display 10. Therefore, an observer (usually a driver) in the passenger compartment sees the left-eye image or the right-eye image with the left eye or the right eye in the virtual image 26, and thus looks at a distant position during driving. Even if the viewpoint is moved from the state, there is no change in congestion, and quick recognition is possible. Further, as shown in FIG. 5B, the image projected on the windshield glass 24 can be enlarged by reflecting the image on the concave mirror 30.

  In addition, the display device according to the present embodiment is operated while being held mainly by a hand such as a digital still camera (DSC) or a digital video camera (DVC), and the distance between the object to be photographed and the display device is viewed from the observer. It is preferably mounted on a different type of device. As a result, when the object to be photographed and the display device are viewed alternately, the recognized image is hardly blurred even when the viewpoint is moved to the display device, and photographing with higher accuracy is possible.

  Further, the display device according to the present embodiment may be mounted on a personal device of a type that is mainly fixed and used when using a desktop personal computer, a notebook personal computer, a portable DVD player, or the like.

  Here, a method for causing one of the left eye and the right eye of the observer to recognize an image will be briefly described. As such a method, an observer puts on special glasses so that the left eye image can be seen only by the left eye and the right eye image can be seen only by the right eye. Special glasses include high-speed shutters, and the left and right images can be viewed separately by synchronizing the display and the shutter.

  Moreover, as a method for causing an observer to recognize an image without using special glasses, there is a parallax barrier (parallax barrier) method. In this case, only a left-eye image or a right-eye image can be seen from the left and right viewpoints of the observer by a parallax barrier having a vertical slit corresponding to the image. In the present embodiment, a parallax barrier may be disposed on the front surface of the display of the display device, or a switch liquid crystal may be disposed on the front surface of the display of the display device, and the parallax barrier may be controlled by the switch liquid crystal.

  Furthermore, while using the same principle as the parallax barrier as described in Patent Document 1, the pixel arrangement of the right-eye image and the left-eye image in the display unit is staggered (checkered flag). In addition, there is a step barrier type filter in which openings are arranged in a staggered manner in correspondence with pixels in a filter arranged in front of the display unit. The filter allows the right eye pixel to be seen by the observer's right eye when the right eye recognizes the image, and the left eye pixel to be seen by the observer's left eye when the left eye recognizes the image. As a result, it is possible to prevent the occurrence of unnecessary vertical stripes by preventing a decrease in the number of pixel columns in the horizontal direction. In the present embodiment, a step barrier may be disposed on the front surface of the display of the display device, or a switch liquid crystal may be disposed on the front surface of the display of the display device, and the step barrier may be controlled by the switch liquid crystal. However, this method has a problem that the range in which the vertical direction can be seen is limited. In order to widen the visible range in the vertical direction, it is preferable to use a parallax barrier arranged in a stripe.

  Moreover, you may utilize the lenticular system which uses a directional light source (backlight) as described in Unexamined-Japanese-Patent No. 8-194273. That is, in this embodiment, the display device may include a directional backlight, or a lenticular lens may be disposed between a display such as a liquid crystal panel and the directional backlight.

  In the display device according to the present embodiment, display may be performed using linearly polarized light, or display may be performed using circularly polarized light. By using linearly polarized light, it can be easily realized, and by using circularly polarized light, even when the angle of the eye changes with respect to the display, it is possible to eliminate display quality degradation.

It is a figure explaining the principle of the display apparatus which concerns on embodiment of this invention. (A) It is a figure which shows the outline of an example of the image displayed on a display in the display apparatus which concerns on embodiment of this invention. (B) It is a figure which shows the outline of an example of the image recognized by the observer in the display apparatus which concerns on embodiment of this invention. It is a figure explaining the conventional display apparatus. (A) It is a figure which shows the outline of an example of the image displayed on a display in the conventional display apparatus. (B) It is a figure which shows the outline of an example of the image recognized by observers, such as when seeing a target object in the conventional display apparatus. (C) It is a figure which shows the outline of an example of the image recognized by the observer when time passes for a while after the consciousness which moves a viewpoint from a target object etc. worked in the conventional display apparatus. (A), (b) It is a figure which shows an example of a structure at the time of applying the display apparatus which concerns on embodiment of this invention to a head-up display system.

Explanation of symbols

  10, 20 display, 12 object to be photographed or position viewed during driving, 14 observer, 24 windshield glass, 26 virtual image.

Claims (12)

  A display device that causes an image to be recognized by either the left eye or the right eye of an observer.   A display device characterized by being capable of switching between a case where an image is recognized by one of the left eye and the right eye of an observer and a case where an image is recognized by both eyes of the observer.   A display characterized in that it is possible to switch between the case where the observer's left eye recognizes the image, the case where the observer's right eye recognizes the image, and the case where the observer's eyes recognize the image. apparatus. The display device according to any one of claims 1 to 3,
A display device, wherein the display device is a liquid crystal display device. The display device according to any one of claims 1 to 4,
A display device comprising a backlight having directivity. The display device according to claim 5,
A display device comprising: a display; and a lenticular lens between the display and the backlight having directivity. The display device according to any one of claims 1 to 4,
A display device comprising a display, wherein a switch liquid crystal is disposed in front of the display. The display device according to any one of claims 1 to 4,
A display device characterized in that display is performed using linearly polarized light. The display device according to any one of claims 1 to 4,
A display device characterized in that display is performed using circularly polarized light. The display device according to any one of claims 1 to 9,
A display device, wherein the display device is mounted on a digital video camera. The display device according to any one of claims 1 to 9,
A display device, wherein the display device is mounted on a digital still camera. The display device according to any one of claims 1 to 9,
The display device is mounted on a head-up display device in which an actual display is displayed on a windshield glass of a vehicle.

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