JPH04240993A - Stereoscopic display device - Google Patents

Abstract

PURPOSE:To improve the display quality of the stereoscopic image display device. CONSTITUTION:The stereoscopic image display device is made up of a stereoscopic image display device 1 comprising picture element display elements whose light transparency is arranged and distributed in a three-dimension space, an image pickup device 2 to obtain a contour image of an object, and a display drive section 3 controlling light transparency of a photoelectric conversion section display element at a position of a three-dimension space corresponding to the stereoscopic image display device 1 with an image signal of each point of the 3-dimension space obtained by the image pickup device 2. The stereoscopic image display device 1 is formed by laminating plural face display devices 11-1n, and the display drive section 3 is formed by face drive section 3i(i=1-n) driving the face display device 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display device, and particularly to a three-dimensional image display device with improved display quality.

0002

2. Description of the Related Art Three-dimensional image display devices are roughly divided into those that require special glasses for the viewer and those that do not. In the first device, the viewer wears glasses on the left and right eyes of the viewer, each equipped with a polarizing filter having a first polarization direction and a second polarization direction that differ by 90 degrees from each other. The image and the right-eye image are alternately displayed, and in synchronization with the switching of the left and right image displays, other polarizing filters having the first and second polarization directions are alternately placed in front of the image display surface. Arrange. The observer can obtain a three-dimensional effect by synthesizing a three-dimensional image in his or her cerebrum using the parallax between the two eyes.

In the former second device, an observer wears glasses equipped with a red filter and a blue filter, respectively, on the left and right eyes of the observer, and an image for the left eye is displayed in red on the display screen.
Display the right eye image overlaid in blue. This can be displayed either in print or on a cathode ray tube display. The observer views the left-eye image and the right-eye image simultaneously with the left and right eyes, respectively.
A three-dimensional effect can be obtained from the parallax between both eyes.

As the latter, devices using lenticular lenses or holograms are known.

[0005]

Problems to be Solved by the Invention With the conventional glasses-wearing viewing device, it is troublesome to put on the glasses. Furthermore, the images use the parallax between both eyes to temporally switch between the left and right eyes and synthesize afterimages in the brain to create a three-dimensional effect, which somehow lacks realism. Devices that use color filter glasses have the disadvantage that images are colored, making them difficult to see.

[0006] Lenticular lenses have a narrow image viewing range, and the eyes tend to get tired easily. Those using holograms look quite natural, but have the disadvantage of having unique coloring. The purpose of this invention is to solve these conventional inconveniences and to significantly improve display quality without requiring special glasses, without narrowing the visible range of the image, or without special coloring. The present invention aims to provide a three-dimensional image display device.

[0007]

[Means for Solving the Problems] A stereoscopic image display device of the present invention includes a stereoscopic display in which pixel display elements whose light transmittance can be controlled are distributed and arranged in a three-dimensional space, and a stereoscopic image display device that displays a contour image of a subject. a display driving unit that controls the light transmittance of a pixel display element at a corresponding position in the three-dimensional space of the stereoscopic display using an image signal at each point in the three-dimensional space obtained by the imaging device; Be equipped.

[0008]

[Embodiment] An embodiment of the present invention will be described with reference to FIG. Reference numeral 1 denotes a three-dimensional display in which pixel display elements whose light transmittance can be controlled are distributed and arranged in a three-dimensional space. 11, 12..., 1n (n is an integer of 2 or more) are stacked in the front-rear direction. Although not shown on each surface display 1i, pixel display elements are arranged in a matrix.

Reference numeral 2 denotes an imaging device for obtaining a contour image of a subject, such as an X-ray CT (Computer To-Mog)
This is a device that uses an image analysis device to extract the outline of a tomographic image obtained by a tomographic (X-ray) scanner (X-ray tomographic imaging device); in this example, the subject is cut at approximately equal intervals in the front and back direction. Tomographic images at n locations are obtained, and the image data of each point (zi, The contour image data obtained is stored in the memory.

Reference numeral 3 denotes a display driving unit that controls the light transmittance of the pixel display element at the corresponding position in the three-dimensional space of the stereoscopic display 1 using the image signal of each point in the three-dimensional space obtained by the imaging device 2. Then, the image display device 1i of the stereoscopic display device 1 (i=1 to n
) is comprised of a surface drive unit 3i (i=1 to n). The contour image data Di (i=1 to n) in the i-th tomographic plane is supplied from the memory of the imaging device 2 to each surface driving section 3i, and the surface driving section 3i drives the corresponding surface display 1i to display its The contour image data Di is displayed. Generally, the surface driving section 3i includes a signal electrode or signal bus driving circuit and a scanning electrode or scanning bus driving circuit, and the light transmittance of each pixel display element is controlled by an image signal. Light from a light source (not shown) placed on the back side of the screen display 1n passes through each screen display in sequence and is emitted to the front side. Since a contour image is displayed on each surface display 1i, when the display 1 is viewed from the front side, a three-dimensional image of the subject appears.

As the stereoscopic display 1, as shown in FIG. 2A, a cylindrical display formed by winding a light-transmissive long strip-shaped sheet, such as a matrix liquid crystal display, in a spiral shape with a predetermined number of layers is used. You can also do it. In this case, the image data of the contour image expressed in X, Y, Z orthogonal coordinates in the imaging device 2 of FIG. 1 is converted to, for example, cylindrical coordinates of Z, R, θ,
Using that data, it is possible to display on the corresponding pixel display element of the stereoscopic display 1. Although the light source is not shown, it is provided along the axis of the three-dimensional display 1.

Furthermore, as shown in FIG. 2B, it is also possible to use a three-dimensional display 1 in which light-transmissive arc-shaped circumferential displays (for example, matrix liquid crystal displays) 11 to 1n having different radii are stacked concentrically. . The display drive section 3 is provided with a peripheral surface drive section 3i that drives the peripheral surface display device 1i. The light source is shown in Figure 2.
Similar to A, it is provided along the axis. In this case as well, it is convenient to use image data converted into cylindrical coordinates.

In the embodiments shown in FIGS. 1 and 2, a specific tomographic image can be displayed instead of the stereoscopic image, or both can be displayed simultaneously, if necessary. Figures 1 and 2
In the embodiment B, each surface or circumferential surface display device 1i of the stereoscopic display 1 and the corresponding surface or circumferential surface driving section 3i of the display drive section 3 may be configured integrally.

Similarly, in the embodiment shown in FIG. 2A, the stereoscopic display 1 and the display driving section 3 may be constructed integrally.

[0015]

Effects of the Invention According to the present invention, by displaying contour images of a large number of cross-sections of an object on a 3D display in which light-transmissive sheet-like liquid crystal displays are stacked, a 3D image of the object as a whole can be obtained. can be displayed. Unlike conventional glasses, this invention does not require special glasses, and the visible range of the image is not narrowed when using a lenticular lens, nor is the display area colored as when using a hologram. . It is easy to make the distribution of pixel display elements dense in three dimensions as necessary, and the display quality can be significantly improved compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a basic configuration diagram showing another embodiment of the present invention.

Claims (1)

[Claims] 1. A three-dimensional display comprising pixel display elements whose light transmittance can be controlled and arranged in a three-dimensional space;
An imaging device that obtains a contour image of a subject, and an image signal of each point in the three-dimensional space obtained by the imaging device to control the light transmittance of the pixel display element at the corresponding position in the three-dimensional space of the stereoscopic display. A stereoscopic image display device comprising a display drive unit.