JPS6387896A - Stereoscopic video device - Google Patents

Abstract

PURPOSE:To attain a stereoscopic image with simple constitution by using a couple of liquid crystal display devices displaying respectively left and right images having left/right paralax. CONSTITUTION:A stereoscopic image device 11 consists a couple of liquid crystal display devices (LCD)12, 13, a half mirror 14 functioning as an optical means interposed between the LCDs 12, 13, and a polarized spectacles 15 functioning as an eyepiece means to visuarize a video image having a paralax formed on the half mirror 14. A polarized plate is used for the LCDs 12, 13 to visualize changes in physical properties of the liquid crystal. The polarized direction of the polarized plate of the LCD 12 is in parallel with the horizontal scanning direction of the LCD 12 as shown in caption A1 and the polarized direction by the polarized plate of the LCD 13 is in parallel with the vertical scanning direction of the LCD13 as shown in caption A2. Thus, the captions A1, A2 are orthogonal to each other. Thus, the stereoscopic video image device 11 whose constitution is far simplified is obtained.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a stereoscopic video device.

Prior art FIG. 6 is a perspective view showing the configuration of a stereoscopic imaging device r111 of the prior art, and FIG. 7 is a simplified side view of the fjsG diagram. The configuration of a conventional three-dimensional image device 1 will be described with reference to FIGS. 6 and 7. The stereoscopic video device 1 includes a pair of television receivers (hereinafter abbreviated as CRT) 3
．． 4, a half mirror 5, and the polarization II mirror 2. On the front surface of each CRT 3.4 are arranged polarizing plates 6.7 whose polarization directions are shifted by 90" from each other.
．． 4 is the optical axis! 1. ! 2 are arranged to be perpendicular to each other, and the CRT 3 displays, for example, a left V & tear image, and the CRT 4 displays, for example, a right V&T image.

Here, the polarizing direction of the polarizing plate 6 is, for example, parallel to the horizontal scanning direction of the CRT 3, and the polarizing direction of the polarizing plate 7 is selected to be perpendicular to the polarizing direction of the polarizing plate 6. Also CRT3.4
The vertical scanning directions of are set to be orthogonal to each other. Further, the half-7 mirror 5 is arranged so as to form an angle of 45 degrees with each of the polarizing plates 6 and 7. Further, the polarization direction of the left-hand polarizing plate 8 of the polarized glasses 2 is selected to be the same as the polarizing direction of the polarizing plate 6, and the polarization direction of the right-hand polarizing plate 9 is selected to be the same as the polarizing direction of the left-hand polarizing plate 8.
The polarization direction is selected to be the same as that of 7.

In the stereoscopic video device 1 having the above configuration, the CR
From T3.4, both eyes are 8! Video signals having differences are displayed alternately, for example, every field.

Therefore, the viewer wearing polarized light@mirror 2
The left-eye image displayed on CRT 4 is received only from the left end, and the right-eye image displayed on CRT 4 is received only from the right end. In this way, the viewer perceives a three-dimensional image on the half mirror 5.

Problems to be Solved by the Invention In the stereoscopic image device 1 having the above-described configuration, the CRT 3.
It is necessary to separately provide polarizing plates 6 and 7 on the front surface of 4, which has the problem of complicating the configuration and increasing the number of parts.

An object of the present invention is to solve the above two problems and provide a three-dimensional image device with a significantly simplified configuration.

Measures to Solve the Problems The present invention provides a pair of liquid crystal display devices that respectively display a left side image and a right side image having left and right binocular parallax. A pair of such liquid crystal display devices, wherein the polarizing plate has a polarization direction parallel to the vertical scanning direction of the liquid crystal display device, and the polarization direction of the polarizing plate of the other liquid crystal display device is perpendicular to the polarization direction. , which is interposed between each liquid crystal display device, and includes an optical means that transmits the image on the blade side and reflects the image on the other side, and when viewing the optical image of the optical means, the optical means corresponds to each of the polarization directions. This stereoscopic imaging device is characterized in that it uses an eyepiece having a polarizing plate in a polarizing mode.

Operation The stereoscopic video device according to the present invention uses a pair of free-view display devices that display a left side image and a right side image, respectively, having left and right binocular parallax. A polarizing plate is used in the F&crystal display device to visualize physical changes in liquid crystal. Regarding the polarization direction of such a polarizing plate, the polarization direction of the polarization plate of one liquid crystal display device is selected to be parallel to the vertical scanning direction of the liquid crystal display device, and the polarization direction of the polarization plate of the other liquid crystal display device is selected to be parallel to the vertical scanning direction of the liquid crystal display device. is chosen to be perpendicular to the polarization direction.

Further, the optical means interposed between the liquid crystal display devices has a characteristic of transmitting the negative side image and reflecting the other side image.

Therefore, one of the left side image and the right side image is transmitted through the optical means, and the other is reflected, so that an image having left and right binocular parallax is formed on the optical means.

This image is visually recognized using an eyepiece having a polarizing plate with a polarization mode corresponding to each of the polarization directions.In this way, only the image for the left eye is received from the polarizing plate of the eyepiece corresponding to the left eye. A finite image can be received from the polarizing plate corresponding to the right limit. In this way, stereoscopic viewing becomes possible.

Embodiment FIG. 1 is a perspective view showing the configuration of a three-dimensional image device 11 according to another embodiment of the present invention, and FIG. f52 and FIG. 3 are diagrams explaining the principle of this embodiment. The configuration of the stereoscopic image device 11 of this embodiment will be described with reference to FIGS. 13 and LCD
A half mirror 14 which is an optical means interposed between 12.13 and a polarized light [1 [Includes L mirror 15.]

A polarizing plate (not shown) is used in the LCD 12, 13 to visualize physical changes in the liquid crystal. L.C.
The direction of polarization by the polarizing plate D12 is parallel to the horizontal scanning direction of the LCD 12, as shown by arrow A1 in FIG.
The direction of polarization by the polarizing plate of the LCD 13 is indicated by arrow A in Fig. 2.
As shown by 2, it is parallel to the vertical scanning direction of the LCD 13. Furthermore, these LCDs 12, 13 are arranged so that their vertical scanning directions are orthogonal to each other, and therefore the arrows Al and A2 are orthogonal to each other. Further, the lengths Ll and L2 of the display areas of these LCDs 12 and 13 along the vertical scanning direction are both selected to be equal.

On the other hand, the half mirror 14 has LCDs 12, 13 and
are arranged at an angle of 45°, thus L
For example, the right-hand side image displayed on the CD 12 passes through the 8-7 mirror 14 as shown by the arrow B1, and is transmitted to the CRT 13.
The right-limit image displayed is reflected by the half mirror 14 as shown by arrow B2. That is, CRT12.
13, the left and right dosing images are displayed alternately, for example, every field of the video signal, so that when viewing the half mirror 14, a pair of images having left and right binocular parallax are alternately displayed at high speed. This means that the image is formed while blinking.

When viewing the image on such a half mirror 14, polarized light 1i111! 15 is used. Polarized mirror 15
A polarizing plate 16 having the same polarization direction as the polarization direction of the LCD 12 (indicated by arrow A1 in FIG. 2) is provided in a portion corresponding to the left limit of the CRT 13.
A polarizing plate 17 having the same polarization direction as the polarization direction (indicated by arrow A2 in FIG. 2) is disposed r11.

FIG. 4 is a diagram showing the polarization mode of the optical image on C when the half mirror 14 is visually observed. Referring also to FIG. 4, when the video signal with binocular parallax is imaged on the half mirror 14 in this way, the polarization direction of the image on the half mirror 14 is as shown in FIG. Polarization direction AI, A2
are mutually orthogonal.

FIG. 5 is a simplified cross-sectional view showing the structure of the LCD 12 used in this embodiment. The structure of the LCD 12 will be described below, but the LCD 13 may also have a similar structure, differing only in the polarization direction. The upper side is the lower side of the lath substrate 18.
On the glass substrate 19 side, color filters 20G and 2 that transmit only blue light, green light, and red light, respectively, are provided.
A large number of 0B and 20R (indicated by reference numeral 20 when collectively referred to) are arranged in large numbers. On this color filter 20, a common electrode 21 and an alignment film 22 are laminated, respectively, to form an upper substrate 23.

On the other hand, on the upper glass substrate 12 side of the lower (itll ff glass substrate 19), an ii!! elementary electrode 24 is formed, an alignment film 25 is formed on these, and a lower substrate 2G is constituted. The LIAf&@23 and the lower substrate 2G are spaced apart from each other by a spacer 27, and a liquid crystal 28 is sealed between them.

Further, on mutually opposite surfaces of the upper and lower substrates 23,26, there are polarizing plates 16a116 whose polarization directions are parallel to each other.
b (indicated by reference numeral 16 when collectively referred to) are arranged r11, respectively.

In this LCD 12, illumination light is emitted from the lower substrate 26gA as indicated by an arrow A3. For example, when no voltage is applied between the common electrode 21 and the pixel 1 electrode 24, the liquid crystal 28
If the polarizing plate 16a is of a type that transmits the transmitted light without changing its polarization direction, the light transmitted through the polarizing plate 16a is composed of polarized light in only one direction. This polarized light does not change its polarization direction when passing through the liquid crystal 28, and therefore passes through the polarizing plate 16b as it is, and in this case, the LC
D12 is not displayed.

When a voltage is applied between the common electrode 21 and the pixel electrode 24, the polarization direction of the light passing through the liquid crystal 28 is bent, for example, by 90". Therefore, the polarized light passing through the polarizing plate IGa is blocked by the polarizing plate 16b. Therefore, the pixel electrode 24 to which the voltage is applied is visually recognized as displaying a predetermined color, etc. When such a half mirror 14 is visually observed using the polarization III mirror 15, an image with a three-dimensional effect can be seen. Can be visually recognized.

In order to form an image of the entire display area of the LCD 12.13 on the half mirror 14, the length L3 of the half mirror 14 shown in FIG.
- < 1). In this way, as described in the prior art, CRT3.4 (6th
There is no need to separately arrange the polarizing plates 6 and 7 on the front surface of the stereoscopic image device 11 (see the figure, the same applies hereafter), and it is possible to obtain a stereoscopic image device 11 with a significantly simplified configuration.

Effects As described above, the stereoscopic video device according to the present invention uses a pair of liquid crystal displays VcrIl that respectively display a left side image and a right side image having left and right binocular parallax. The polarizing plate of one liquid crystal display device 2 is selected such that its polarization direction is parallel to the vertical scanning direction of the liquid crystal display device, and the polarization direction of the polarizing plate of the other liquid crystal display device is selected to be perpendicular to the polarization direction. I made it possible to be chosen. The optical means interposed between each liquid crystal display device has a characteristic of transmitting the image on the -blade side and reflecting the image on the other side.

Therefore, one of the left side image and the right side image is transmitted through the optical means, and the other is reflected, so that an image having left and right binocular parallax is formed on the optical means. If this image is viewed using an eyepiece having a polarizing plate with a polarization mode corresponding to each of the polarization directions mentioned above, only the left wearing image will be visible from the polarizing plate corresponding to the left limit of the eyepiece, and it will correspond to the right limit. Images for the right eye can be viewed through the polarizing plate.

In this way, stereoscopic viewing becomes possible with a simple configuration.

[Brief explanation of the drawing]

FIG. 11 is a perspective view showing the configuration of a stereoscopic image device 11 according to an embodiment of the present invention, FIG. 52 and FIG. 3 are diagrams explaining the principle of this embodiment, and FIG. 5 is a cross-sectional view of the LCD 12, FIG. It is. 11... Stereoscopic video device, 12.13... LCD, 1
4...Half mirror-115...Polarized light [mirror, 16.1
7...Polarizing plate, AI, A2...Polarization direction agent
Patent attorney number of strokes Keiichi 3rd figure 4th figure

Claims (1)

[Scope of Claims] A pair of liquid crystal display devices each displaying a left-side image and a right-side image having left-right binocular parallax, wherein a polarizing plate used in one liquid crystal display device has a direction of polarization. is parallel to the vertical scanning direction of the liquid crystal display device, and the polarization direction of the polarizing plate of the other liquid crystal display device is perpendicular to the polarization direction, and a pair of such liquid crystal display devices interposed between each liquid crystal display device. and an optical means for transmitting an image on one side and reflecting an image on the other side, and for viewing the optical image of the optical means, an eyepiece means having a polarizing plate with a polarization mode corresponding to each of the polarization directions. A three-dimensional image device characterized in that it is used for three-dimensional imaging.