JPH0239034A - Stereoscopic image display device - Google Patents

Abstract

PURPOSE:To obtain a clear stereoscopic image by longitudinally using a device, which is obtained by sticking a lenticular lens sheet on the surface of a plane display device. CONSTITUTION:The lenticular lens sheet 2 is superposed and stuck on the plane display device 6. When a signal for a left eye and a signal for a right eye are made incident on an odd number-th scanning line 7 and an even number-th scanning line 8 respectively, a picture element for a left eye and a picture element for a right eye are vertically and alternately arrayed. When the title device is arranged so that the longitudinal direction of the lens sheet 2 is made vertical, the picture element by the signal for left eye and the picture element by the signal for right eye are horizontally and alternately arrayed and stereo can be possible in some part on the outside. Since the reduction of flickering can be generally enhanced by dividing a horizontal scanning line to odd number and even number and dividing one frame into two fields in a display device, the image for the left eye and the image for the right eye are vertically and alternately arrayed on a display screen by synthesizing an image signal in which the signal for the left eye and the signal for the right eye are alternately incorporated every field. The stereoscopic display circuit can be formed just by adding a circuit for synthesizing the signals for the left and the right.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to fields that require stereoscopic images, stereoscopic television,
3D video, 3D videophone that communicates between remote locations,
This is a three-dimensional image display device that can be used in devices used to check one's appearance at eyeglass stores, barber shops, clothing sales points, etc.

[Conventional technology]

Conventionally, the means for displaying three-dimensional images has been to use polarized glasses or time-sharing shutter glasses, and to select the video signals incident on the left and right eyes in synchronization with the images displayed field by field on the display. . In this method @
Not only is the mirror unreliable, which is a nuisance, but in videophone conversations where both parties look at each other's faces, the image of the other party wearing glasses is displayed, which seriously impairs the natural look of the person. There were drawbacks.

To solve this problem, a lenticular lens method has been proposed that displays three-dimensional images without using glasses. Figures 6(a) and 6(b) show the plan, front, and side views of this method.
) and (C), and FIG. 7 is an enlarged view of the main part of FIG. 6(a). In these figures, 1 is the CRT main body, 2
is a lenticular lens sheet pasted on the surface glass of a CRT, and is composed of a large number of lenticular lenses 2A. 3 is a glass having a thickness of D constituting the CRT; 4
is a display pixel existing on the inner surface of the glass 3 and located at the focal plane of the lenticular lens 2A, and 5 is an electron beam for forming the display pixel 4. In such a configuration, when left-eye pixels and right-eye pixels are formed alternately in the horizontal direction by the electron beam 5, the lenticular lens 2
Most of the light emitted from the display pixel 4 on the focal plane A passes through one lenticular lens 2A on its upper surface (the cross section is represented by one semicircle) and exits to the outside. Stereoscopic viewing is possible at certain positions. Although this method enables stereoscopic viewing, it is impossible to reduce the thickness D of the glass 3 due to constraints on the structural strength of the CRT.
I have no choice but to use the long focal length lenticular lens 2A. Therefore, the brightness of the stereoscopic image decreases, and the light that has passed through the adjacent lenticular lens 2A also enters the eye at the same time, so there is also the drawback that alignment is difficult when attaching the lenticular lens sheet 2.

In order to solve the above-mentioned drawbacks, there are examples in which a flat display is used instead of a CRT. FIGS. 8(a) and 8(b) are a front view and a sectional view showing this prior art. 6 is liquid crystal,
It is a flat display device such as a PDP or a fluorescent display tube. The lenticular lens sheet 2 is attached to the surface of the flat display device 60. Also, Figure 9 shows
9 is an enlarged view of the dotted line portion in FIG. 8. FIG. The display pixels 4 are arranged on the focal plane of the lenticular lens 2A.

In such a configuration, if left-eye pixels and right-eye pixels are alternately formed in the display pixels 4, stereoscopic viewing becomes possible at an appropriate external position. Since the flat display device 6 is thin, a short focus lenticular lens 2A can be used, and a bright image can be obtained. Moreover, at the same time, the amount of light from the adjacent lenticular lens 2A decreases, making it easy to ensure stereoscopic vision. Furthermore, since the display surface is flat, alignment between the lenticular lens 2A and the display pixels 4 is easy.

(Problem to be solved by the invention) However, this method requires display pixels to be arranged alternately horizontally, and the circuit for synthesizing image signals is complicated. It has the disadvantage that it cannot be used to display the subject.

Furthermore, since the display screen is long horizontally, if two input television cameras are placed on both sides of the display screen, the distance between the two input television cameras will be much wider than the distance between human eyes, which impairs naturalness.

The purpose of this invention is to enable bright and stable stereoscopic vision without the use of glasses, to realize a synthesis circuit for left eye signals and right eye signals with a simple configuration, and at the same time to be able to photograph vertically long objects naturally. It is an object of the present invention to provide a three-dimensional image display device that displays a three-dimensional image without impairing the image quality.

(Means for Solving the Problems) A stereoscopic image display device according to the present invention is one in which a lenticular lens sheet is pasted on the surface of a flat display device such as a liquid crystal, FDP, or fluorescent display tube, which has a flat surface. It is used in vertical position.

(Function) In the present invention, even vertically long objects can be displayed three-dimensionally without impairing their natural appearance.

[Embodiment] FIGS. 1, 2(a), 3(b), and 3 are explanatory diagrams showing an embodiment of the present invention. 1 is a front view of the flat display device 6, FIG. 2(a) is a front view of the lenticular lens sheet 2, and FIG. 2(b) is a side view of the lenticular lens sheet 2.

In FIG. 1, 7 is an odd-numbered scanning line, 8 is an even-numbered scanning line, 9A is a terminal for inputting a signal to the odd-numbered scanning line 7, and 9B is a terminal for inputting a signal to the even-numbered scanning line 8. It is.

In Figure 2, 2 is a lenticular lens sheet,
It consists of a large number of lenticular lenses 2A.

FIG. 3 shows a stereoscopic image display device according to the present invention, and the driving circuit and the like are omitted. 10 indicates an observer. To construct the stereoscopic image display device of FIG. 3, the lenticular lens sheet 2 of FIG. 2 is placed on the flat display device 6 of FIG. 1.
Attach the . At this time, each lenticular lens 2A is provided so that each odd-numbered scanning line 7 and even-numbered scanning line 8 coincide with its focal plane. That is, the odd-numbered scanning lines 7 and the even-numbered scanning lines 8 are positioned at positions corresponding to R and L in FIG. 9.

Then, when the whole is rotated approximately 90 degrees in the in-plane direction, each scanning line is at a position scanning in the vertical direction as shown in FIG.

In such a configuration, when a left-eye signal is input to the odd-numbered scanning line 7 and a right-eye signal is input to the even-numbered scanning line 8, left-eye pixels and right-eye pixels are vertically arranged alternately. As shown in Fig. 3, when the lenticular lens sheet 2 is installed so that its longitudinal direction is vertical, the pixels according to the left eye signal and the pixels according to the right eye signal are arranged horizontally (not rotated approximately 90 degrees). (The images do not alternate with each other, so they cannot be seen as a three-dimensional image.) By performing operations similar to those shown in the prior art, stereoscopic viewing is possible in a certain part of the exterior. in general,
The display device attempts to reduce flicker by dividing horizontal scanning lines into odd and even numbers and dividing one frame into two fields. Therefore, by combining image signals in which left-eye signals and right-eye signals are alternately inserted for each field, left-eye images and right-eye images are alternately arranged vertically on the display surface. therefore,
According to the present invention, it is possible to easily form a stereoscopic display circuit by simply adding a left and right signal synthesis circuit to an existing electric circuit. This shows that compatibility between stereoscopic display and general display can be easily ensured.

Further, with such a configuration, it becomes easier to display a vertically long subject, which was not suitable in the prior art.

FIGS. 4 and 5 are explanatory diagrams of the case where the embodiment of the present invention is applied to a videophone. 11 is a TV camera, 1
2 is a field synchronization signal, 13 is a right eye image signal, 14
15 is an image signal synthesizer, 16 is a synthesized image signal, 17 is a transmission device, 18 is a communication line, 19 is an image signal for the left eye;
2o is an image signal separator, 2o is an image memory, 21 is a display device driver for right-eye signals, and 22 is a display device driver for left-eye signals.

In such a configuration, the image of the observer 10 captured by the television camera 11 is synthesized by the image signal synthesizer 15 so that left and right image signals are arranged alternately in time, and this is transmitted from the transmission device 17 to the communication line. 1B to a remote transmission device 17. Remote transmission device 17 that received the image signal
is separated into left and right signals by the image signal separator 19, and sent to display device driving devices 21 and 22, respectively. These image signals are transmitted from terminals 9A and 9B to odd-numbered scanning lines 7. Stereoscopic viewing becomes possible by manually inputting the even-numbered scanning lines 8 and performing the operations shown in the embodiments described above. In this example,
Although the right-eye signal was input to the odd-numbered scanning line 7 and the left-eye signal was manually input to the even-numbered scanning line 8, it goes without saying that stereoscopic vision is possible even with the reverse combination. In this case, since the field frequency is half of the field frequency of a general image, flicker may increase depending on the image. In this case, image signals for one field are stored in the image memory 20, and the other eye signals are displayed. Sometimes flicker can be reduced by displaying the image one field before.

It goes without saying that flicker can also be reduced by increasing the field frequency. The position of the TV camera 11 in FIG. 4 may be any position in principle, but if it is placed above half the height of the flat display device 6, the viewer 10 on the other side will not be able to look at it. This is the most preferable human interface because it allows you to obtain a clear image.

(Effects of the Invention) The present invention provides a flat display device that performs display by alternately scanning odd-numbered scanning lines and even-numbered scanning lines, and a rent screen having a semicylindrical cross section on the display surface of this flat display device. It consists of a lenticular lens sheet in which a lenticular lens is provided so that its focal plane coincides with each odd-numbered and even-numbered scanning line of a flat display device, and the whole is positioned so that each scanning line scans in the vertical direction. As a result, a bright and reliable stereoscopic image can be obtained with a simple image signal synthesis and separation circuit, and at the same time, there is an advantage that it is easy to display a vertically long subject.

[Brief explanation of the drawing]

FIG. 1 is a front view of a flat display according to an embodiment of the present invention, FIG. 2(a) is a front view of a lenticular lens sheet according to an embodiment of the present invention, and FIG. 2(b) is a side view of a lenticular lens sheet. 3 are perspective views showing the configuration of an embodiment of the present invention, FIGS. 4 and 5 are perspective views and circuit block diagrams of an embodiment in which the embodiment of the invention is applied to a videophone, and FIG. Figures (a), (b), and (C) are a plan view, a front view, a side view, and a seventh
The figures are a partially enlarged sectional view of FIG. 6(a), FIG. 8(a),
(b) is a plan view and a sectional view showing the conventional method, and FIG. 9 is an enlarged view of the dotted line portion in FIG. 8(b). In the figure, 1 is the CRT main body, 2 is the lenticular lens sheet, 2A is the lenticular lens, 3 is the glass, 6 is the flat display device, 7 is the odd numbered scanning line, 8 is the even numbered scanning line, and 9A is the A terminal 9B inputs a signal to the odd scanning line, a terminal 9B inputs a signal to the even scanning line, and 10 is an observer. ■■ Figure 10 Observation 1 Figure Figure Figure Figure Figure

Claims (1)

[Claims] A flat display device that performs display by alternately scanning odd-numbered scanning lines and even-numbered scanning lines, and a lenticular lens having a semicylindrical cross section on the display surface of the flat display device, the focal plane of which is It is characterized by comprising a lenticular lens sheet provided in alignment with each odd-numbered and even-numbered scanning line of a flat display device, and the entire structure is positioned so that each of the scanning lines scans in the vertical direction. Stereoscopic image display device.