JPH04107086A - Stereoscopic television - Google Patents

Abstract

PURPOSE:To project a stereoscopic image by a single tube without using glasses by providing a lenticular lens, projecting a video for a right eye and the video for a left eye alternately to a television screen, and alternately making the area for the right eye and the area for the left eye of a liquid crystal shutter a photo transmitting state synchronously to each video. CONSTITUTION:When a pair of cameras 5a and 5b starts photographing the same object synchronously, a video signal for the right eye and the video signal for the left eye are alternately projected to a cathode-ray tube 1 at every one field by a changeover switch SW, a liquid crystal shutter 3 is driven synchronously to this. And since only the video for the right eye is taken by the right eye of a watcher through a lenticular lens 4 and only the video for the left eye is taken by a left eye through the lenticular lens 4, the watcher can see the video as the color stereoscopic video.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a stereoscopic television that does not require glasses.

[Summary of the Invention] The present invention provides a liquid crystal shutter in front of a television screen, further provides a lenticular lens in front of the television screen, and connects the liquid crystal shutter to a right eye area through which light corresponding to the right eye of the viewer passes and a left eye area of the viewer. A right-eye image and a left-eye image are alternately projected on the television screen, and in synchronization with each image, the right-eye area and the left-eye area of the liquid crystal shutter are divided into left-eye areas through which light corresponding to By making areas alternately transparent, three-dimensional images can be projected using a single tube without the need for glasses.

[Prior Art and Problems to be Solved by the Invention] Conventional single-tube 3D televisions project both right-eye and left-eye images overlappingly over the entire screen, and the viewer sees the left-eye image in front of the right eye. The stereoscopic image was seen by wearing glasses that prevented the left eye from seeing images for the right eye, and the left eye had to wear glasses. Also, as a 3D TV that does not require glasses, two projectors project a right image and a left image, and both images are projected onto a lenticular screen to view a 3D image. is necessary.

Therefore, an object of the present invention is to provide a stereoscopic television that allows viewing stereoscopic images with a single tube without using glasses.

[Means for Solving the Problems] A three-dimensional television according to the present invention for solving the above problems includes a liquid crystal shutter provided in front of the television screen, a lenticular lens provided in front of the liquid crystal shutter, and a cylindrical axis of the lenticular lens. is positioned vertically,
The range of the liquid crystal shutter through which light from the pixels of the television screen corresponding to the viewer's right eye passes through the lenticular lens is defined as a right eye area, and the light from the pixels of the television screen corresponding to the viewer's left eye passes through the lenticular lens. dividing the range of the liquid crystal shutter through which the liquid crystal shutter passes as a left-eye area, and alternately projecting a right-eye image and a left-eye image on the television screen;
When a right-eye image is projected on the television screen, the right-eye region of the liquid crystal shutter is in a transparent state, and when a left-eye image is projected on the television screen, the left-eye region of the liquid crystal shutter is in a transparent state. It was driven.

[Operation] When a right-eye image and a left-eye image are alternately displayed on a television screen, the right-eye image is seen only by the viewer's right eye, and the left-eye image is seen only by the viewer's left eye, resulting in a stereoscopic image.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1-3.

Fig. 1 shows a schematic perspective view of a three-dimensional television, in which the cathode ray tube 1 is a color Trinitron system and the vertical and horizontal positions of the television screen 2 are reversed, but the deflection yoke is in the normal position. has been done.

The scan lines therefore run horizontally as usual. A liquid crystal shutter 3 is provided in front of the television screen 2, and a lenticular lens 4 is provided in front of the liquid crystal shutter 3. The liquid crystal shutter 3 is located at the focal plane of the lenticular lens 4, and the lenticular lens 4 is arranged such that the cylindrical axis of each cylindrical convex portion 4a is located in the vertical direction.

The range of the liquid crystal shutter 3 through which light from the pixels of the television screen 2 corresponding to the viewer's right eye passes through the lenticular lens 4 is defined as a right surface area SI;
The range of the liquid crystal shutter 3 through which light from the pixels of the television screen 2 corresponding to the viewer's left eye passes is defined as a left eye region S.
, and a fully closed area S is provided between the pair of left and right eye areas. The right eye region S1 and the left eye region S each have the same number of cylindrical convex portions 4a of the lenticular lens 4, and in this embodiment, a completely closed region S3 is provided between the pair of left and right eye regions to prevent crosstalk. It is prevented.

FIG. 2 shows a circuit block diagram of a 3D television, in which a pair of cameras 5a and 5b capture images for the right eye and images for the left eye, respectively, and each output video signal is transmitted to terminals a and b of the changeover switch SW. are supplied respectively. This changeover switch SW is controlled by a changeover control signal from the control circuit 6, and is controlled to alternately output a right-eye video signal and a left-eye video signal every field (period of the vertical synchronization signal). The output of the changeover switch SW is led to the cathode ray tube 1 via a signal processing circuit 7. The control circuit 6 also controls the driving of the liquid crystal shutter 3, and when the right eye image on the television screen 2 is being projected as shown in FIG. 2, the left eye area S of the liquid crystal shutter 3 is displayed.

is controlled so that it is transparent.

In the above configuration, when the pair of cameras 5a and 5b start photographing the same subject in synchronization, the right-eye video signal and the left-eye video signal are alternately projected on the cathode ray tube l for each field by the changeover switch SW. The liquid crystal shutter 3 is also driven in synchronization with this. Then, only the right-eye image is taken into the viewer's right eye through the lenticular lens 4, and only the left-eye image is taken into the left eye through the lenticular lens 4, so that the viewer sees it as a color three-dimensional image. In addition, this embodiment has the advantage that moiré does not occur because the vertical and horizontal directions of the television screen 2 are reversed.

In this embodiment, two cameras 5a and 5b were used to project a stereoscopic image, but nine (three or more) cameras may be used to project a three-dimensional image, and in this case, the liquid crystal display A more realistic stereoscopic image can be obtained by dividing the area of the shutter 3 into n parts, increasing the vertical period by n times, and making one cycle for n field screens.

As described above, according to the present invention, a liquid crystal shutter is provided in front of the television screen, and a lenticular lens is further provided in front of the liquid crystal shutter, and the liquid crystal shutter is used as a right eye area through which light corresponding to the viewer's right eye passes. and a left eye area through which light corresponding to the viewer's left eye passes, and images for the right eye and images for the left eye are alternately projected on the TV screen, and in synchronization with each image, the right eye area of the liquid crystal shutter is Since the area for the left eye and the area for the left eye are configured to be alternately transparent, it is possible to project a stereoscopic image using a single tube without using glasses.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a schematic perspective view of a three-dimensional television, FIG. 2 is a circuit block diagram, and FIG. 3 is a waveform diagram. 2...TV screen, 3...LCD shutter, 4...
Lenticular lens, Sl... right eye area, S2.
・・Left eye [effect of invention] 1 other person

Claims (1)

[Claims] (1) A liquid crystal shutter is provided in front of the television screen, a lenticular lens is provided in front of this liquid crystal shutter, and this lenticular lens is arranged so that its cylindrical axis is located in the vertical direction. The area of the liquid crystal shutter through which light from the pixels of the television screen corresponding to the viewer's left eye passes is defined as the right eye area, and the area of the liquid crystal shutter through which light from the pixels of the television screen corresponding to the viewer's left eye passes is defined as the left eye area. A right-eye image and a left-eye image are alternately projected on the television screen, and when a right-eye image is displayed on the television screen, the right-eye area of the liquid crystal shutter is 3. A three-dimensional television set, wherein the left-eye area of the liquid crystal shutter is driven to be transparent when a left-eye image is being displayed.