JP2000171751A - Binocular display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mitigate asthenopia and the lowering of visual acuity by continuously inducing the sight line of a user in the directions up and down, right and left, and far and near, and adequately varying an image-forming distance, which is an apparent distance of an image, and brightness of the display. SOLUTION: When an audience selects a desired channel by a TV tuner, a video signal is transmitted to a display position control circuit of a binocular display 1. The display position control circuit converts this signal for driving each pixel of an LCD, and makes each LCD for left eye LE and right eye RE display a same video. The sight line of the audience is induced depending on which part of a liquid crystal panel of the LCD to display the video. IF the video display position is successively moved in order of (a)-(b)-(c)-(d)-(a) for both right and left eyes, the sight line of the audience largely turns round clockwise by only normally paying attention to the video, and the eyeballs are naturally stimulated to exercise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binocular display for displaying television images and images output from an information processing apparatus such as a personal computer. It relates to a suitable binocular display.

[0002]

2. Description of the Related Art CRT displays are the most widely used displays for displaying television images and images output from an information processing apparatus such as a personal computer. Since the screen is scanned more than once, a large burden is imposed on the eyes due to the flickering of the screen. In comparison,
A liquid crystal display or a plasma display is a display method in which a display state of each pixel is maintained, and therefore, a burden on eyes is smaller than a CRT display.

[0003] However, in these conventional displays, images are displayed on a plane at a fixed distance from the eyes, and the viewing position of the display is usually almost fixed. It is known that the muscles and the lens that control the movement of the body are placed in the same tension, causing fatigued eyes and reduced vision.

[0004] On the other hand, it is known that training of muscles controlling eye movements is effective for preventing or reducing visual acuity, and some visual acuity training devices have been proposed.

In Japanese Patent Application Laid-Open No. Hei 7-51333, the screen is automatically switched to a visual acuity training mode when normal processing by a personal computer is performed for a predetermined time or more so that visual acuity training can be performed between personal computers. Points are moved and displayed, lines or figures are continuously enlarged and reduced, and the color and brightness of the screen are continuously changed. However, while the above method encourages the movement of the iris to regulate the amount of light incident on the muscles and retina that move the eyeball, it does not move the ciliary body or lens that regulates the focus of the eye.

On the other hand, Japanese Patent Application Laid-Open Nos. 8-257707 and 8-243 disclose movements of the ciliary body and the crystalline lens.
No. 137 has been proposed. However, Japanese Unexamined Patent Application Publication No. Hei 8-257077 discloses a technique in which a dedicated training image is created for the purpose of vision recovery training and is used as an index. Also, JP-A-8-243
No. 137 promotes the movement of the ciliary body and the lens by alternately showing the trainee two indices to the trainee,
Although TV and video images can be used as indices, the eyes cannot follow immediately when the indices are switched to perspective, and the viewing angle changes depending on the indices. Not suitable for work in.

[0007]

As described above, the conventional visual acuity training apparatus is effective for maintaining or recovering the visual acuity, but all of them are tired eyes and decrease in the visual acuity while watching television or working on a personal computer. Cannot be reduced.

[0008] It is an object of the present invention to exercise various muscles and lenses that control eye movements appropriately even when watching television or working for a long period of time on a personal computer. It is to provide a display that can be reduced.

[0009]

In order to achieve the above object, according to the present invention, a user is required to prevent the muscles and lenses controlling eye movements from being in the same tension state even when viewing a display for a long time. The user's gaze is continuously guided up, down, left, right, and near and far at a speed that can be followed unconsciously, and the image forming distance, which is the apparent distance of the image, and the brightness of the screen are appropriately changed. .

In order to guide the direction of the user's line of sight,
A binocular display incorporating a pair of left and right image display panels is used to change the display position of each image for the left eye and the right eye. In addition, an optical system that continuously changes the image formation distance is provided as a means to change the image formation distance in order to encourage the user to move the lens, and the image formation distance and the screen magnification are linked. The optical system was configured so that the viewing angle was always kept constant. As a result, the apparent resolution of the image can be kept constant even when the image formation distance of the image is increased, so that the eye movement can be promoted without interrupting the viewing of the television or the work on the personal computer.

The outline of a typical invention disclosed in the present application will be briefly described below.

(1) In a binocular display for displaying an input image on a pair of displays of the left and right eyes,
Means for continuously changing the display position of each of the left and right images in the horizontal or vertical direction so that the direction of the line of sight is guided to the up, down, left, right or perspective only by the user watching the displayed image. It is provided.

(2) In a binocular display for displaying an input image on a pair of left and right eyes,
Provide an image display unit larger than the size of the image to be displayed,
An image incident angle control means for controlling an incident angle of an image by controlling a display position in the image display section is provided.

(3) The binocular display of the means (1) or (2) is provided with means for allowing a user to adjust the range in which the display position of an image is changed.

(4) The binocular display of the above means (1) or (2) is provided with means for allowing a user to adjust an initial value of a display position of an image.

(5) In a binocular display for displaying an input image on a pair of left and right displays,
Control means is provided for continuously changing the brightness of the displayed image so that the movement of the iris is encouraged just by watching the displayed image.

(6) The binocular display of the means (5) is provided with means for allowing a user to adjust the range of change in the brightness of the displayed image.

(7) The binocular display of the means (5) is provided with means for allowing a user to adjust the initial value of the brightness of the displayed image.

(8) In a binocular display for displaying an input image on a pair of displays of right and left eyes,
A display position control means for continuously moving a spatial position of a display image over time is provided.

(9) In the binocular display of the means (8), the display position control means is provided with means for controlling the distance and magnification of the display image in conjunction with each other, and the display image is controlled while the viewing angle is kept constant. It is designed to change the perspective.

(10) The binocular display of the means (8) or (9) is provided with means for adjusting the range in which the distance of the displayed image is changed by the user.

(11) The binocular display of the means (8) or (9) is provided with means for allowing a user to adjust the initial value of the image forming distance of the displayed image.

(12) A storage means for storing a plurality of types of results adjusted by the user in any one of the means (1) to (11), and a storage means for storing the plurality of types of adjustment results. A means for selecting a desired one is provided.

(13) The input video is, for example,
The information is input from an information processing device, a television tuner, a video deck, or the like via a video input terminal.

[0025]

Embodiments of the present invention (embodiments) will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment (example) of a binocular display for television viewing according to the present invention, FIG. 2 is an external view thereof, and FIG. FIG. 4 is a mounting diagram of an optical system of the binocular display of FIG.

As shown in FIGS. 1 and 2, the binocular display for viewing television of this embodiment has a CPU 2, a display position control circuit 3, a backlight control circuit 4, a zoom lens control circuit 5, and a display control program 6. Nonvolatile memory 7, video input terminal 8, television tuner 9, liquid crystal panels (LCD) 31, 32, backlights 41, 42, zoom lenses 51, 52, lens moving motors 61, 62,
It comprises a mode selection button 71, a left arrow button 72, and a right arrow button 73.

The binocular display 1 includes a pair of liquid crystal panels (LCDs) 31 and 32 for the left eye and the right eye, and the viewer can illuminate each LCD 31 illuminated by the backlights 41 and 42. , 32 are viewed through an optical system including zoom lenses 51 and 52.

The optical system includes an LCD as shown in FIG.
31, 32, backlights 41 and 42, zoom lens 5
1, 52, lenses 53, 54, 55, 56, and mirrors 57, 58. The LCD 31, backlight 41, zoom lens 51, lenses 53 and 55, and mirror 57 are for the left eye LE, and LCD 32, backlight 42, zoom lens 52, lenses 54, 56, and mirror 58 are for the right eye RE. is there.

The display control program 6 is executed by the CPU 2 and controls display of an image via the display control circuit 3, the backlight control circuit 4, and the zoom lens control circuit 5. The mode selection button 71 and the left and right arrow buttons 72 and 73 are used by the viewer to adjust the display position of the video and the like.

When the viewer selects a channel to be watched by the TV tuner 9, the video signal of the program corresponding to the channel is transmitted to the display position control circuit 3 of the binocular display 1 via the video input terminal 8. This video signal is an analog signal called an NTSC signal in the case of ordinary television broadcasting.
Converts this signal into a signal for driving each pixel of the LCD, and causes the LCD 31 and 32 for the left eye LE and the right eye RE to display the same video.

The LCDs 31 and 32 have a larger number of pixels than the conventional liquid crystal panel for television viewing. This guides the viewer's line of sight depending on which part of the liquid crystal panel displays an image. For example, if a liquid crystal panel having twice the number of pixels in the horizontal and vertical directions as that of the conventional liquid crystal panel is adopted, it is possible to guide the line of sight in a range of a viewing angle twice as large as that of the conventional liquid crystal panel. The display position control circuit 3 has a function of displaying an image at each of the left and right display position coordinates output from the CPU 2.

FIG. 4 shows an embodiment of a display position when an image is displayed on a quarter of the LCD. The display position of the image is changed from (a) → (b) → ( If you move continuously in the order of c) → (d) → (a), the viewer's line of sight makes a large clockwise rotation just by watching the video normally, and the movement of the eyeball naturally Is prompted.

FIGS. 5 (e) and 5 (f) show the direction of the viewer's line of sight when the display positions of the left and right images are shifted inward and outward, respectively. When the images of the left and right eyes are made to overlap, the viewer's line of sight is directed to the near point at (e) and to the apogee at (f).
Therefore, if the display position of the video is continuously moved from (e) to (f), the viewer's line of sight moves from the perigee direction to the apogee direction just by watching the video normally. Become.

However, simply changing the display position of the left and right images in the horizontal or vertical direction does not change the lens itself because the distance from the eyes to the image does not change much. Therefore, when the display position of the image is changed from the perigee direction to the apogee direction, the lens movement motors 61 and 62 are driven via the zoom lens control circuit 5 to position the lens groups constituting the zoom lenses 51 and 52. , The optical distance from the eye to the image and the magnification of the image are linked. As a result, even when the optical distance from the eyes to the image changes, the visual angle of the image display portion can be kept constant and the apparent resolution of the image can be fixed, and training can be performed even while watching a normal TV program. It becomes possible.

FIGS. 6 and 7 show examples of the construction of zoom lenses 51 and 52 each including two convex lenses and one concave lens. The distance L between the LCD 30 and the user's eye is constant, and FIG. 6 shows the positions of the lens groups when the imaging distance is small.
FIG. 7 shows the positions of the lens groups when the imaging distance is large.

As shown in FIG. 6, when both the objective lens 501 and the concave lens 502 are moved near the LCD 30, the virtual image 90 of the LCD introduced to the user's eyes is observed at a position d ₁ away from the eyes. You. On the other hand, as shown in FIG. 7, when both the objective lens 501 and the concave lens 502 are moved away from the LCD 30 so that the distance from the LCD 30 to the center of the objective lens 501 does not exceed the focal length of the objective lens 501, a virtual image 90 of the LCD is obtained. Is observed at a position d ₂ away from the eye.

However, in either case,
The viewing angle of the virtual image 90 of the LCD is α, which is the same. As described above, by using the zoom lens, it is possible to continuously change the image formation distance of the image while keeping the viewing angle of the image projected on the LCD constant. In the above example, the functions of the zoom lenses 51 and 52 have been described in the case where the optical system is configured as a straight line. However, a similar zoom lens can be configured for the optical system of FIG.

The above description shows the basic principle for encouraging the movement of the eyeball and the lens. However, when the display position of an image is actually changed, the change in the horizontal and vertical directions and the change in the distance are described. A specific pattern may be set by appropriately combining the change and the speed of movement, or a pattern to be executed by the viewer is selected from a plurality of patterns set for each purpose or time. Alternatively, a pattern may be randomly generated using a random number.

Next, a method for encouraging the movement of the ciliary body, which is a muscle that changes the size of the iris, which adjusts the amount of light entering the eye according to the brightness of the object, will be described. If the amount of light entering the eye is constant, the size of the iris will be almost constant, and the ciliary body will be placed in the same tension state, so that the eye must be It is necessary to change the amount of light entering. In the present invention, the brightness of the image entering the eye is changed by controlling the light amounts of the backlights 41 and 42 that irradiate the LCDs 31 and 32 with the backlight control circuit 4. However, if the screen is made too bright, the burden on the eyes will increase.On the contrary, if the screen is made too dark, the visibility will decrease. , The brightness may be changed for 5 minutes every 25 minutes.

FIG. 8 shows a schematic flowchart of the display control program 6 for controlling the image display of the binocular display described above.

When the program is started, first, in step S10, a group of operation parameters stored in the nonvolatile memory 7 is read. The operation parameter group is shown in Table 1.
As shown in (Example of operation parameter group), display position control, zoom lens control and backlight control such as initial display position, horizontal movement range, vertical movement range, image formation range, backlight light quantity change range, screen focus, etc. This is a user-configurable parameter to be used. Initially, a standard value is set as a default value.

[0043]

[Table 1]

In step S20, the display position, the zoom lens, and the backlight are initialized according to the operation parameters read in step S10. In the following step S30, it is determined whether or not the mode selection button 71 has been pressed. If not, the control of the display position of the LCD, the control of the zoom lens, and the control of the backlight are performed in step S40 and thereafter. If the mode selection button 71 has been pressed, the process branches from step S30 to step S70, where an operation parameter to be set is selected, and a parameter value is set in step S80. In step S90, it is determined whether or not the parameter setting has been completed. If the setting has not been completed, the process returns to step S70, and the setting of another parameter is repeated.
Return to

FIG. 9 shows a detailed flow of the display position control processing in step S40. The movement pattern data for determining the display coordinates is, as shown in Table 2 (an example of the movement pattern data for determining the display coordinates), a set of target position coordinates and movement time arranged in order. In this example, starting from the center of the LCD (coordinates (0, 0)), the image is rotated once clockwise from the upper right (coordinates (100, 100)), then rotated counterclockwise once, and then the LCD is rotated. The case of returning to the center is shown. Here, the portion where the target position coordinates have not changed means that the video is fixed at the coordinates for a corresponding time.

[0046]

[Table 2]

In step S401, the target position coordinates (Xi, Yi) and the movement time Ti are read from the pointer (initial point to the head) indicating the current target position in the movement pattern data. Next, in step S402, the elapsed time tp is calculated from the difference between the time Tps at which the current target position is set and the current time.
Ask for. Then, in step S403, the reference display position coordinates (X, Y) are calculated. Here, (Xs, Ys) are the coordinates recorded as the previous target position, and the initial values are the initial display position coordinates in Table 1. Next step S404
In S405, when the elapsed time tp becomes equal to or longer than the movement time Ti, the previous target position (Xs, Ys) and the time Ts are updated, and the pointer is updated to the next target position.

From the next step S406, an image forming distance is set. As shown in Table 3 (examples of control pattern data of the imaging distance), the control pattern data of the imaging distance is obtained by sequentially arranging a set of the target imaging distance and the moving time. The case where the image forming distance is assumed to be 50 cm, the image forming distance is sequentially changed to 10 m, 30 cm, and then returned to 50 cm is shown. Here, a portion where the imaging distance has not changed means that the imaging distance is fixed for a corresponding time.

[0049]

[Table 3]

In step S406, first, the target imaging distance Lj and the moving time Tj are obtained from the pointer indicating the current target imaging distance.
Is read. Next, in step S407, the elapsed time tl is obtained from the difference between the time Tls at which the current target imaging distance is set and the current time. Then, the image forming distance L is calculated in step S408. In subsequent steps S409 and S410, when the elapsed time tl becomes equal to or longer than the movement time Tj, the previous imaging distance Ls and the time Tls are updated, and the pointer is updated to the next target imaging distance.

Next, in step S411, the number of corrected pixels d
Is calculated. Here, C is a constant determined from the viewing angle of the screen, the resolution, and the distance between the left and right eyes. For example, when displaying 600 pixels at a viewing angle of 60 degrees, the distance between the left and right eyes is 7c.
If m, the value is approximately 18 pixels · m. Next, the corrected display position coordinates (XL, YL) of the left-eye LCD and the corrected display position coordinates (XR, YR) of the right-eye LCD are determined in step S412, and the values of these coordinates are determined in step S413. Is output to the display position control circuit 3.

As a result, an image is displayed on the left and right LCDs at an angle of sight corresponding to the predetermined imaging distance L.

Subsequently, in step S50 of FIG. 8, the lens moving motors 61 and 62 are driven via the zoom lens control circuit 5 to perform zooming so that the image forming distance between the left and right eyes becomes L obtained in step S408. Control the lens.

FIG. 11 is a flowchart showing details of the backlight control processing in step S60. As shown in Table 4 (example of backlight light amount control pattern data), the backlight light amount control pattern data is obtained by arranging a set of a target light amount and a change time in order.
Assuming that the initial light quantity is 100, the light quantity is sequentially set to 200, 50
, And returns to 100 after the change. Here, a portion where the target light amount has not changed means that the light amount is fixed for a corresponding time.

[0055]

[Table 4]

In step S601, first, the target light amount Bk and the change time Tk are read from a pointer indicating the current target light amount. Next, in step S602, the elapsed time tb is obtained from the difference between the time Tbs at which the current target light quantity is set and the current time. Then, the light amount B is calculated in step S603. In the following steps S604 and S605, when the elapsed time tb is equal to or longer than the change time Tk, the previous target light amount Bs and the time Tbs are updated, and the pointer is updated to the next target light amount. Then, the value of the light amount B is output to the backlight control circuit 4 in step S606.

The three buttons provided on the side of the binocular display 1 are buttons for adjusting the display. The mode selection button 71 is a button for selecting an operation parameter to be adjusted. When the button is pressed once, an operation parameter selection mode is set, and a plurality of operation parameter names are displayed on the screen as shown in the example of FIG. Is done. A pointer mark 80 in FIG. 12 indicates the currently selected operation parameter, and includes a left arrow button 72 and a right arrow button 73.
When the pointer mark 80 is moved in front of the name of the operation parameter to be adjusted by the user and then the mode selection button 71 is pressed again, the corresponding operation parameter adjustment mode is entered. For example, when entering the “horizontal movement range (left)” adjustment mode, an image is displayed at a position corresponding to the current “horizontal movement range (left)” value stored in the operation parameter group of Table 1. Is done.

Fine adjustment of the display position can be performed by the left arrow button 72 and the right arrow button 73. When the image is displayed at a desired position and the mode selection button 71 is pressed, the value corresponding to the adjusted position is obtained. The operation parameter value is updated. Then, since the screen returns to the operation parameter selection mode again, if necessary, another operation parameter may be selected and adjusted, and if all adjustments are completed, “end” is selected and the mode is selected. When the button 71 is pressed, the screen returns to the normal image display.

The results of the above adjustments are all recorded in the operation parameter group of Table 1, and the initial set values are referred to at the time of the initial setting in step S20 in FIG. If the value is another value, for example, the value of “horizontal movement range (left)”, it is referred to when the display position is output in step S413 in FIG. 10, and a check is performed so that the output value does not fall outside the range. If the amount of backlight is
It is referred to when outputting the light amount in step S606.

By performing the above-mentioned adjustment, the binocular display of the present invention can cope with the difference in the distance between both eyes, including children and adults, and can provide a person with hyperopia or myopia or a visual acuity of both eyes. It is possible to correspond to the person who has the difference. In addition, since the intensity of eye movement can be appropriately set by adjustment, it is possible to flexibly cope with the physical condition of each person. Furthermore, if a plurality of patterns of adjustment results can be recorded and a means for the user to select a desired pattern is provided, even if the pattern is shared by a plurality of users, the pattern set by the user himself may be used. It is possible to easily make adjustments, and it is also possible to use a method in which the same user registers a plurality of his / her favorite patterns and selects a favorite pattern from the registered patterns.

Although the present embodiment has been described with respect to an example in which the present invention is applied to a binocular display for viewing television, a binocular display of a type used by connecting to an information processing apparatus such as a personal computer is also applicable to a video display. Input signal is R
It is exactly the same except that it becomes the GB format and the resolution of the LCD is different.

[0062]

As described above, according to the present invention,
Even if you watch TV for a long time or work on your computer for a long time, the eye muscles and lens movement are moderately promoted, so you can reduce eye fatigue and vision loss compared to conventional displays .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a binocular display for television viewing according to the present invention.

FIG. 2 is an external view of the binocular display for viewing television shown in FIG.

FIG. 3 is a mounting diagram of an optical system in the binocular display for television viewing shown in FIG. 1;

FIG. 4 is a diagram for describing image display for guiding a direction of a line of sight according to the embodiment.

FIG. 5 is a diagram for describing a video display for guiding a perspective line of sight according to the embodiment;

FIG. 6 is a diagram for describing a configuration example of a zoom lens according to the present embodiment when the imaging distance is small.

FIG. 7 is a diagram illustrating a configuration example of a zoom lens according to the present embodiment when the image forming distance is large.

FIG. 8 is a schematic flowchart of a display control program according to the embodiment.

FIG. 9 is a detailed flowchart of a display position control process according to the embodiment.

FIG. 10 is a continuation of the detailed flowchart of the display position control process of the embodiment.

FIG. 11 is a detailed flowchart of a backlight control process according to the embodiment.

FIG. 12 is a display example of an operation parameter selection screen according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Binocular display, 2 ... CPU, 3 ... Display position control circuit, 4 ... Backlight control circuit, 5 ... Zoom lens control circuit, 6 ... Display control program, 7 ... Nonvolatile memory, 8 ... Video input terminal, 9 ... TV tuner, 30,
31, 32 ... LCD, 41, 42 ... backlight, 5
1, 52: zoom lens, 61, 62: lens moving motor, 71: mode selection button, 72: left arrow button,
73 right arrow button, 90 virtual image of LCD.

Claims (6)

[Claims] 1. A binocular display that displays an input image on a pair of left and right eyes in a pair of displays. A means for continuously changing the display position of each of the left and right images in the horizontal direction or the vertical direction. 2. In a binocular display for displaying an input image on a pair of left and right eyes, an image display unit larger than the size of the image to be displayed is provided, and a display position in the image display unit is controlled. A binocular display characterized by comprising an image incident angle control means for controlling an incident angle of an image by the image display device. 3. In a binocular display for displaying an input image on a pair of left and right displays, the brightness of the display image is adjusted so that the movement of the iris is promoted just by looking at the displayed image. A binocular display comprising a control means for continuously changing. 4. In a binocular display for displaying an input image on a pair of left and right eyes, a display position control means for continuously moving a spatial position of the display image over time is provided. A binocular display characterized by being provided. 5. The binocular display according to claim 4, wherein the display position control means includes means for controlling the distance between the display image and the magnification in conjunction with the display image, and controlling the display image while keeping the viewing angle constant. A binocular display characterized by changing perspective. 6. A storage means for storing a plurality of types of results adjusted by a user in the binocular display according to claim 1, and a desired one of the plurality of types of adjustment results. A binocular display comprising means for selecting an object.