JP2595942B2 - 3D image display device - Google Patents

Description

The present invention relates to a device for displaying a three-dimensional image on a display surface, and is suitable for use in, for example, a computer graphic system.

[Prior Art] As a conventional stereoscopic image display device, an anaglyph system using colored glasses and a glasses system with a shutter are known. In the anaglyph method, a right-eye image is displayed in red, for example, on a display surface of a cathode ray tube or the like, and a left-eye image having parallax with respect to the right-eye image is superimposed on the right-eye image in cyan, for example. The three images are projected and viewed through colored glasses in which the right eye is colored cyan and the left eye is colored red so that a three-dimensional effect is obtained.

In the eyeglass system with shutter, the image for the right eye and the image for the left eye are alternately projected on the display surface in a time-division manner, for example, for each field, and the right-eye image and the left-eye image are synchronized with the time-division cycle. Are seen through eyeglasses with shutters that are alternately shielded from each other to obtain a three-dimensional effect. As such a stereoscopic image display apparatus using the glasses system with a shutter, for example, the invention of Japanese Patent Application No. 61-287309 has been proposed by the present applicant and the present inventors.

FIG. 3 shows a block configuration of a conventional stereoscopic image display apparatus using a computer graphic system, which is used in both an anaglyph system and a glasses system with a shutter.

In FIG. 3, the image generation unit 2 creates right-eye image data and left-eye image data consisting of R, G, and B primary color signals based on an image creation command from the host computer 1 and writes them to the image memory. The image data read from the image memory is supplied to the monitor receiver 3 together with the horizontal and vertical synchronization signals H and V. Thus, in the case of the anaglyph method, the right-eye image and the left-eye image of different colors are displayed simultaneously on the display surface 4 of the receiver 3 in a mutually superimposed manner. The image and the image for the left eye are displayed alternately at a predetermined cycle.

Therefore, a stereoscopic image can be observed by viewing the displayed image through the stereoscopic glasses 5. In the case of an anaglyph system, the left and right lenses are colored in different colors. In the case of the eyeglass system with a shutter, the left and right lenses are alternately shielded in synchronization with an image. Things are used. In this case, the shutter switching signal S ₁ is supplied to the glasses 5 as indicated by the dotted line from the image generation unit 2.
Is added. As the shutter means, a liquid crystal or the like is used for the left and right lenses, and the shutter means is electrically controlled.

On the other hand, in recent years, three-dimensional digitizers capable of detecting spatial coordinates on the X, Y, and Z axes with high accuracy have been developed, and some of them have been put to practical use. The three-dimensional digitizer includes a fixed magnetic dipole transmitting antenna called a source, a magnetic dipole antenna called a freely movable sensor, and an electronic circuit unit. Therefore, for example, when the user moves the head or body to change the position of the eye by attaching the sensor to the head of the user, the position information can be obtained from the sensor. Regarding such a three-dimensional digitizer, a paper entitled "Characteristics and Applications of a Three-Dimensional Digitizer" is published on page 27 of the magazine "Video Information", November 1984.

[Problems to be solved by the invention]

In the above-described conventional stereoscopic image display device, images displayed in both types are always fixed for the same image, and the displayed image is the same even if the observer moves his or her head and changes the viewing position. It is. However, when a human actually looks at a stopped object, if the viewing position is changed, a part that was not visible until now becomes visible and a part that was visible is usually invisible. Therefore, the stereoscopic effect obtained by the conventional stereoscopic image display device is unnatural, and there is a regret lacking in realism.

[Means for solving the problem]

In the present invention, means for detecting the position of the right eye and the position of the left eye with a magnetic three-dimensional digitizer, and means for generating the image for the right eye and the image for the left eye in accordance with the position information Provided.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and the same parts as those in FIG. 3 are denoted by the same reference numerals.

In the present invention, the aforementioned three-dimensional digitizer 6 is used. The three-dimensional digitizer 6 includes the above-described source 7, sensor 8, and signal processing unit 9. The source 7 is fixed in an appropriate position, and the sensor 8 is attached to a part of the observer's body, for example, over the head via a hat or the like. That is, the sensor 8 is attached so that when the observer moves his or her head or body to change the position of the eyes, that is, the position (viewpoint) at which the screen 4 is viewed, the sensor 8 moves accordingly.

The position information of the viewpoint obtained from the sensor 8 is transmitted to a signal processing unit 9.
Is processed. Thus the right eye position information signal from the signal processing unit 9 S _R and the left eye position information signal S _L is supplied to the image generating unit 2. Image generating unit 2 immediately above signals S _R, based on an instruction of the host computer 1 in response to S _L, and sends the receiver 3 by drawing a right-eye image and the left eye image.

Therefore, when the image displayed on the display screen 4 is viewed through the glasses 5, a stereoscopic image that changes according to the movement of the viewpoint can be observed.

FIG. 2 shows an example of a three-dimensional image that can be viewed according to the present invention.
10 is visible. In this stereoscopic image 10, the viewpoint is (1) → (2) →
By moving to each point shown in (3), A of this stereoscopic image 10
Points A, B and C are respectively A ₁ → A ₂ → A ₃ , B ₁ → B ₂ → B ₃ and C ₁
→ C ₂ → C ₃ appears to move. Therefore, it is possible to generate a natural three-dimensional feeling that is extremely close to reality.

〔The invention's effect〕

Since the right-eye image and the left-eye image change in accordance with the movement of the observer's viewpoint, a more realistic and natural stereoscopic effect can be obtained than a conventional stereoscopic image.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of displaying a stereoscopic image according to the present invention, and FIG. 3 is a block diagram of a conventional stereoscopic image display device. In addition, in the code | symbol used for drawing, 2 ... Image generation part 3 ... Display surface 5 ... Stereoscopic spectacles 6 ... 3D digitizer.

Claims (1)

(57) [Claims] An image for a right eye and an image for a left eye are displayed on a display surface, and the image for the right eye and the image for the left eye are respectively displayed by the right and left eyes using stereoscopic glasses. The position of the right eye and the position of the left eye are detected by a magnetic three-dimensional digitizer, and the image for the right eye and the image for the left eye are generated according to the position information. 3D image display device.