JPH10268805A - 2d/3d image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a 2D/3D image display device capable of high-luminance 2D display. SOLUTION: This device is provided with a light source 1, which emits a parallel light beam, a lenticular lens 15, which converges the parallel light beam, a diffuser 5, which slightly diffuses the light beam made incident from the lenticular lens 15, and an LCD 6, on which the light beam from the diffuser 5 is made incident, and the lenticular lens 15 changes in the distance to the diffuser 5 according as which of a two-dimensional and a three-dimensional image is displayed. The lenticular lens 15 converges the parallel light beam so that it is focused on the diffuser 5 for the three-dimensional image display and in front of the diffuser 5 for the two-dimensional image display, thereby displaying the two-dimensional image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a notebook computer,
The present invention relates to an image display device used as a display of a game machine such as a liquid crystal monitor and a pachinko machine, and more particularly to an image display device capable of switching between a high-luminance two-dimensional image and a three-dimensional stereoscopic image for display.

[0002]

2. Description of the Related Art A three-dimensional stereoscopic image can display a Z-axis (depth) which cannot be obtained from a two-dimensional image, and has an advantage that the positional relationship of each object can be clearly determined and identified. 2. Description of the Related Art Conventionally, as a display for displaying a three-dimensional three-dimensional object, a type of display with glasses is widely known. This device prepares a left image and a right image taken from the same position as seen by each of the left and right eyes, and uses a mirror or prism to view the left image only with the left eye and the right image with only the right eye. It is composed.

[0003] However, this device has many problems such as the complexity of wearing glasses. Therefore, development of a 3D (3 dimension) image display device that can be viewed without glasses
Commercialization is underway.

[0004] An image display device capable of switching and displaying 3D images and 2D images without glasses is disclosed in USP.
5, 410, 345 (Apr. 25, 1995). This device displays a 3D image using a lenticular lens, which is a type of compound eye lens, on a liquid crystal display device. As shown in FIG. 4, a light source lamp 1 for a backlight and an elongated groove at a light source position are provided. A slot mask 2, a 2D / 3D diffuser 3 that transmits or diffuses incident light according to electric control, a lenticular lens 4 having a large number of parallel convex lenses, and slightly diffuses incident light. Diffuser 5 and 2
And a liquid crystal device (LCD) 6 in which a liquid crystal material is disposed between the polarizing plates 7 and 8.

[0005] In the case of 3D display, the applied voltage is turned on and the 2D / 3D diffuser 3 becomes transparent, and transmits the light beam from the light source 1 as it is. On the other hand, in the case of 2D display, the applied voltage is turned off, and the light beam incident from the light source 1 is diffused. FIG. 4 shows a case of 3D display.

The LCD 6 has a large number of pixels (pixels) 9, and in the pixels 9 to which a predetermined electric field is applied by a video signal, light passes between the polarizing plates 7 and 8 via a liquid crystal. In the pixel 9 to which no electric field is applied and the electric field is not applied, the liquid crystal prevents light from passing therethrough (some liquid crystal substances may have the opposite effect). The LCD 6 displays an image according to a video signal according to this principle. The LCD 6 for displaying a color is provided with a red, green or blue color filter in front of each pixel, and when the light passes through the pixel 9, the color of the color filter disposed in front thereof is displayed. (Other color systems can be used).

This 2D / 3D image display device displays a 3D image as follows.

As described above, in the case of displaying a 3D image,
The D / 3D diffuser 3 is transparent when a voltage is applied. Therefore, the light emitted from the light source 1 passes through the 2D / 3D diffuser 3 and enters the lenticular lens 4 as shown in FIG. Lenticular lens 4
Collects this light beam and changes it into a plurality of light beams focused on the diffuser 5. The diffuser 5 emits the light to the LCD 6 while slightly widening the angle of the incident light beam. This increases the area where the image is visible for screen viewers,
Another reason is to make the brightness on the LCD 6 surface more uniform.

Each light beam emitted from the diffuser 5 passes through a different pixel 9 of the LCD 6, one entering the right eye 11 and the other entering the left eye 10.

Thus, in this image display device, 3D
In the case of displaying an image, a column of pixels 9 viewed by the right eye 11 (LC
D6) and the row of pixels 9 seen by the left eye 10 will be different. In other words, the lenticular lens 4, the diffuser 5, and the L are arranged such that the pixel row seen by the right eye 11 is different from the pixel row seen by the left eye 10.
It defines the positional relationship of CD6.

At this time, a 3D video signal is supplied to the LCD 6. As the 3D video signal, a video signal of a left image and a video signal of a right image photographed at the positions of the left and right eyes are prepared, and a video signal of the left image is supplied to an LCD 6 pixel column viewed by the left eye 10 and viewed by the right eye 11. The two video signals are interleaved so that the video signal of the right image is supplied to the pixel column. By supplying the interleaved video signal to the LCD 6, a right image is displayed in each pixel row seen by the right eye 11, and a left image is displayed in each pixel row seen by the left eye 10. As a result, the viewer of the screen sees the right image with the right eye and the left image with the left eye.
The image displayed on the CD 6 can be perceived three-dimensionally.

On the other hand, in this 2D / 3D image display device,
In the case of displaying a 2D image, the voltage application of the 2D / 3D diffuser 3 is turned off. Therefore, as shown in FIG.
The D / 3D diffuser 3 diffuses a light beam incident from the light source 1, and a light beam having a random direction, which is not aligned, enters the lenticular lens 4. The lenticular lens 4 cannot collect these rays,
Light rays directed in random directions are incident on the diffuser 5.

Similarly, the direction of the light emitted from the diffuser 5 is also random, so that there is no distinction between the pixels 9 of the LCD 6 that can be seen by the right eye 11 and the left eye 10, and all the pixels 9 are left and right eyes. They look the same.

At this time, by supplying a normal 2D video signal to the LCD 6, a person viewing the LCD screen can receive a 2D video signal.
Perceive a two-dimensional image.

As described above, the 2D / 3D image display device can selectively display a 2D image and a 3D image, and can reproduce a 2D image or a 3D image when reproducing the recording medium on which the 2D image or the 3D image is recorded. It is possible to switch image display settings in accordance with an image, and to display a special scene as a 3D image while a 2D image is being reproduced.

[0016]

However, this 2D / 3
In the D image display device, there is a problem that the brightness of the display screen is reduced when the display is switched to the 2D image display.

In the case of displaying a 3D image, light from the light source 1 of the backlight is condensed by the lenticular lens 4 and is incident on the diffuser 5 and reaches the LCD 6 as it is. When displaying a 2D image, the light from the light source 1 is reflected by the 2D / 3D diffuser 3.
This is because the amount of light finally reaching the LCD 6 is reduced.

In order to compensate for this, in the conventional apparatus, measures such as increasing the output of the light source 1 in the case of 2D display are taken. However, such means complicates the circuit configuration and increases power consumption. There are drawbacks such as.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a 2D / 3D image display device capable of 2D display with high luminance.

[0020]

Accordingly, the present invention provides a 2D /
In the 3D image display device, a light source that emits a parallel light beam, a lenticular lens that collects the parallel light beam, a diffuser that slightly diffuses the light beam incident from the lenticular lens, and an LCD that receives the light beam from the diffuser are included. The lenticular lens is configured to change the distance between the diffuser between the case where a two-dimensional image is displayed and the case where a three-dimensional image is displayed.

In this device, the lenticular lens is
When displaying a three-dimensional image, parallel light rays are focused so as to focus on the diffuser, and when displaying a two-dimensional image, parallel light rays are focused so as to focus before the diffuser.

Therefore, a two-dimensional image can be displayed without lowering the luminance.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a 2D / 3D image display apparatus according to an embodiment of the present invention includes a sidelight type backlight light source 1, a lenticular lens 15 movable back and forth, and A diffuser 5 for slightly diffusing an incident light beam and an LCD 6 for displaying an image are provided.

Backlight light source 1 of sidelight system
Is a fluorescent lamp 12 formed in a frame shape as shown in FIG.
And a light guide plate 14 that enters the frame of the fluorescent lamp 12, and a reflector 13 provided on the back of the light guide plate 14. Light from the fluorescent lamp 12 is guided to the light guide plate 14 and reflected by the reflector 13. The light is then emitted from the front surface of the light guide plate 14 as substantially parallel light rays.

The lenticular lens 15 is placed at a different position between 3D image display and 2D image display. In order to move the lenticular lens 15, here, a moving means using a magnet is provided, and the magnetic piece fixed to the lenticular lens 15 is attracted to the electromagnet installed on the case side, and the lenticular lens 15 is moved.
Is moved by a predetermined distance to fix the position. Of course, other means such as using a motor can be used as the moving means.

The lenticular lens 15 is arranged at a position where parallel light from the backlight source 1 is focused on the surface of the diffuser 5 as shown in FIG. At this time, the positional relationship among the lenticular lens 15, the diffuser 5, and the LCD 6 is the same as in the case of FIG. Therefore, Diffuser 5
Each light beam condensed on the surface is incident on the LCD 6 with its angle slightly widened by the diffuser 5, and enters the LCD 6.
, One enters the right eye 11 and the other enters the left eye 10. That is, in this case, the pixel row of the LCD 6 viewed by the right eye 11 and the pixel row viewed by the left eye 10 differ.

On the other hand, when displaying a 2D image, as shown in FIG. 3, the lenticular lens 15 is located closer to the backlight light source 1 than when displaying a 3D image.
The distance between the lenticular lens 15 and the diffuser 5 is 3
It is arranged so as to be longer than when displaying the D image.
Therefore, the parallel light of the backlight light source 1 is focused by the lenticular lens 15 in front of the diffuser 5, and the diffused light flux after the focus is incident on the diffuser 5.

The diffuser 5 further diffuses this light beam and emits it to the LCD 6. As a result, the light rays incident from the diffuser 5 and the pixels 9 of the LCD 6 through which the light rays pass
The fixed correspondence between the right eye 11 and the left eye 10
This eliminates the distinction between the pixels 9 of the LCD 6 that can be seen. Therefore, the viewer of the screen sees all the pixels 9 in the same way with the left and right eyes and perceives the 2D image.

As described above, in this apparatus, the lenticular lens 3 is mechanically moved to switch between 2D image display and 3D image display.

In this device, even in the case of displaying a 2D image, most of the light rays from the backlight source 1 reach the LCD 6, as in the case of displaying the 3D image, and thus display a high-brightness 2D image. be able to.

In this apparatus, for example, the position of the lenticular lens 15 for displaying a 3D image, that is, the position of the lenticular lens 15 for focusing the light beam from the light source 1 on the diffuser 5 is set to a tolerance of ± 0.36 mm. Range, and the moving distance of the lenticular lens 15 when switching from 3D image display to 2D image display is set to 1.5.
Set to mm. For devices that satisfy this setting condition, 2D
It has been confirmed that the luminance in image display is almost the same as the luminance in 3D image display.

In this embodiment, the moving direction of the lenticular lens is moved in a direction away from the diffuser 5. However, in the case of displaying a 2D image, the lenticular lens may be moved closer to the diffuser 5.

In addition, this device does not require a 2D / 3D diffuser as compared with the conventional device, and can be formed in a thin shape. Further, by making the backlight light source a sidelight type, the thickness can be further reduced, and the thickness of the entire device can be configured to 6 to 7 mm.

[0034]

As is clear from the above description, the 2D / 3D image display device of the present invention can switch and display 2D images and 3D images, and has a complicated circuit configuration and an increase in power consumption. It is possible to increase the brightness of the 2D image without causing the problem.

Also, since this device can be configured to be thin, it can be easily incorporated into equipment.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a 2D / 3D image display device according to an embodiment of the present invention (in the case of 3D image display);

FIG. 2 shows a fluorescent lamp for a light source used in the 2D / 3D image display device of the embodiment;

FIG. 3 is an explanatory diagram showing the configuration of a 2D / 3D image display device according to the embodiment (in the case of 2D image display);

FIG. 4 is an explanatory view showing the configuration of a conventional 2D / 3D image display device (for 3D image display);

FIG. 5 is an explanatory diagram (in the case of 2D image display) showing the configuration of a conventional 2D / 3D image display device.

[Explanation of symbols]

 Reference Signs List 1 light source 2 slot mask 3 2D / 3D diffuser 4, 15 lenticular lens 5 diffuser 6 LCD 7, 8 polarizer 9 pixel 10 left eye 11 right eye 12 fluorescent lamp 13 reflector 14 light guide plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09F 9/00 328 G09F 9/00 328

Claims (4)

[Claims] 1. A 2D / 3D image display device for switching and displaying a two-dimensional image and a three-dimensional image, a light source emitting parallel rays, a lenticular lens condensing the parallel rays, and a ray incident from the lenticular lens. And a LCD on which light rays from the diffuser are incident, and a distance between the diffuser when the lenticular lens displays a two-dimensional image and when a three-dimensional image is displayed. 2D / 3D image display device characterized by changing the following. 2. The method according to claim 1, wherein the lenticular lens converges the parallel rays so as to focus on the diffuser when displaying a three-dimensional image, and in front of the diffuser when displaying a two-dimensional image. The 2D / 3D image display device according to claim 1, wherein the parallel rays are condensed so as to be focused. 3. The lenticular lens according to claim 1, wherein, when displaying a two-dimensional image, the lenticular lens moves away from the diffuser from a position at which a three-dimensional image is displayed. 2D / 3D image display device. 4. The 2D / 3D image display device according to claim 1, wherein the light source is a side light type light source.