JPH0827500B2 - Stereoscopic image display device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display of a panel display, and more particularly to a stereoscopic image display device that does not use glasses such as a frame shutter and has no fritter. is there.

2. Description of the Related Art As a conventional stereoscopic image display device, left and right image information is switched and displayed by some kind of frame signal shutter, visually time-multiplexed and stereoscopically combined, and a lenticular lens is combined with a print screen to create a panorama. It can be roughly divided into three-dimensional ones. In particular, the latter method is considered, in which an image is electronically formed to obtain a three-dimensional image. For example, in the case of using a CRT direct-viewing tube, the technical report ED87-
Invited by 16 references.

FIG. 7 is a block diagram showing the principle of a conventional direct-viewing type stereoscopic image display device. Reference numeral 1 denotes an image forming layer, which generally corresponds to the fluorescent surface of a CRT. Reference numerals 3 and 4 denote light emitting pixels that display stereoscopic information, and 2 is an optical lens that gives stereoscopic parallax, and is composed of a lenticular lens.

The pitch P of the lenticular lens corresponds to the pixel pitch, and a plurality of light emitting pixels are arranged within this pitch P. In this example, the information for left and right parallax is arranged at a pitch of 1/2 P and emits light.

In the conventional stereoscopic image display device configured as described above, the image signals that give left and right parallax are arranged laterally with respect to the pixel pitch P, the left and right parallax signals emit simultaneously, and the optical path refraction of each lenticular lens is refracted. By the action, the ray is split into two principal axes as shown by 5,6.
Therefore, different image information comes into the eye depending on the direction of the viewing angle and is viewed as a stereoscopic image. In such an operation example, FIG. 8 shows an example in which the image forming layer 1 is formed by a light emitting panel using a matrix electrode.
As is well known, in flat panels such as plasma displays and EL displays, pixels intersecting in an electrode matrix emit light, and therefore, a scanning side electrode 11 and a data side electrode 12 sandwich a light emitting device. Reference numeral 9 is a light emitting layer, and 8 and 10 are insulating layers. The data electrodes 12 are formed at a pitch of 1/2 P with respect to the pitch P corresponding to FIG. The intersection of the scanning side electrode 11 and the data side electrode 12 emits light,
A light beam is generated through the glass substrate 7 as indicated by. An operation example in which such a panel is arranged on the image forming layer 1 shown in FIG. 7 is exactly the same as the case described above.

Problems to be Solved by the Invention However, in the configuration as described above, when the stereoscopic information signal is increased (the case of left and right parallax is 2, 3, 4,
(It may increase smoothly, such as 8th magnitude.) It is necessary to make the pixel pitch much smaller than the lenticular pitch.
In other words, conversely, when the minimum pixel density is regulated,
There is a drawback that the pixel pitch P of the lenticular becomes large and the resolution cannot be obtained. As shown in FIG. 7, in the case of fluorescent dots, there is a problem that a bright image cannot be obtained because the pixel pitch is determined by the spot size of the beam current.

Furthermore, in the case of real-time display, if the number of pixels in the horizontal direction increases, in the case of CRT, the bandwidth of the video signal increases in proportion to the picture element, so very high-speed signal processing is required. , Power consumption and cost increase. Even in the matrix type panel, the transfer speed of the horizontal shift register for simultaneously driving the signals of the data side electrodes is increased, and there is a problem of high speed and high output drive.

MEANS FOR SOLVING THE PROBLEMS The present invention comprises a multi-layered transparent panel formed of a plurality of n layers and a lenticular lens having the same pitch as the data electrode pitch of each panel, and the panels of each layer are processed in parallel. The stereoscopic display device includes a signal distribution circuit that simultaneously applies image signals.

Operation The present invention, by the above-described configuration, does not make the electrode pitch fine and does not require high-speed signal drive processing even when the degree of stereoscopic information increases.

Embodiment FIG. 1 shows a block diagram of a stereoscopic image display device in an embodiment of the present invention. In FIG. 1, 21 and 22 are
A transparent matrix panel is shown, and 24 and 25 are light emitting pixels of respective layers. 23 is a lenticular lens,
It is in contact with the panel of the first layer, and its pitch P is equal to the electrode pitch. Reference numerals 26 and 27 denote rays from the light emitting pixel. FIG. 2 is a plan view of FIG. 1 and shows an arrangement relationship of electrodes.
The scanning electrode 31 is common to the two-layer panel, and the data side electrodes 32 and 33 are arranged with a 1/2 pitch, and the electrode pitch is equal to that of the lenticular lens.
Reference numeral 34 denotes a panel device including a light emitting layer, which is a transparent panel composed of transparent electrodes. Scan side electrode in the scanning direction
X ₁ , X _2, ..., X _l , the data-side electrode is Y ₁ for the first layer, and the second electrode
If the layer is Y ₂ , the intersection between the nth pixel of Y ₁ and Y ₂ and the X ₁ line emits light. As a specific example of the transparent panel having such a structure, FIG. 4 shows a layer structure in the case where the EL panel (electroluminescence) is multilayered. The scanning electrode X _l is connected to ELD1
The data electrodes Y ₁ and Y ₂ are arranged in common with the ELD _{2 and} are the light emitting layers.
The two light emitting layers are arranged corresponding to 36 and 35, and the insulating layers 38 and 37 form a three-layer structure. The pitch phase of Y ₁ and Y ₂ is
Shifted by 1/2 P. FIG. 4 shows a case in which the data electrode X ₁ is arranged on the glass substrate, and the other structures are exactly the same and therefore omitted.

The operation of this embodiment configured as described above will be described below. Corresponding to the pixel pitch of the lenticular lens 23, left and right stereoscopic image signals are applied to the transparent panels 21 and 22, respectively, but since the data electrodes Y ₁ and Y ₂ are spatially separated, as shown by 24 and 25. It emits light at a large pitch.
Moreover, since this light emitting effect is partially multi-layered on the transparent panel, it looks bright due to the additive mixing of light. The optical axes of the left and right signals can be separated as shown by 26 and 27.
An example of the drive system for displaying a stereoscopic image as described above is shown in FIG. 5, and its operation will be described. The left and right stereoscopic parallax signals 53 and 52 in two directions are simultaneously driven by driver circuits that drive the Y ₁ and Y ₂ electrodes, respectively. The (XY) panel 56 is driven by a common scanning circuit 57, and the timings of both drivers are controlled by a control circuit 58. Two
One stereoscopic parallax signal may be directly input if it is a plurality of camera signals, but if it is a stereoscopic television signal using two fields of the television, the signal of the input terminal 50 may be converted into a parallel signal by the signal distribution circuit 51. Good.

The 1/60 second field signal may be read twice for each field channel and applied with the 1/60 second field period as it is, as shown in FIG.

As described above, according to the present invention, it is possible to display a stereoscopic image by low-speed processing without reducing the pitch of the pixel electrodes. In this embodiment, the stereoscopic information is two pieces of information, left and right,
It is also possible to make the pixel small and extend it to n layers. At that time, the electrode pitch does not change in the case of a single panel, and there is no problem in the transfer rate. However, it may be necessary to reduce the emission width. Also, for colorization, it is possible to arrange them in the horizontal direction, but in one panel, the light emitting layer has a three-layer structure of red, green, and blue, and the left and right stereoscopic signals are divided into upper and lower two layers. The same idea can be applied.

EFFECTS OF THE INVENTION As described above, according to the present invention, pixels are multiplexed in the layer direction as stereoscopic information increases, and light is added by a transparent panel. Therefore, low-speed signal processing and a bright direct-view stereoscopic image are performed. Images can be realized. Since it is not necessary to narrow the pixel pitch, high-precision display can be realized, and low-speed processing enables driver ICs with low power consumption to be used, which is industrially effective. In order to realize color in the case of CRT, it is necessary to dispose at least 6 picture element phosphors in one lenticular lens, which requires 6 times higher speed and density than the present invention. It is clear that the effect is great.

Also, like the EL panel, the colorized structure is not in the horizontal direction,
In the case of multiplexing in the multi-layer direction and synthesizing by adding and mixing light, it is possible to realize an image with good luminance efficiency and no color shift.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of a stereoscopic image display device in an embodiment of the present invention, FIG. 2 is a front view of the same embodiment, FIG.
FIG. 4 is a sectional view showing a detailed structure of the embodiment, FIG. 5 is a block diagram of a circuit for operating the embodiment, FIG. 6 is a waveform diagram of an image signal in the embodiment, and FIG. FIG. 8 is a sectional view showing the structure of the example, and FIG. 8 is a sectional view showing the detailed structure of the conventional example. 23 …… Lenticular lens, 21,22 …… Transparent panel, 3
1 ... Scan side electrode, 32, 33 ... Data side electrode.

Claims (2)

[Claims] 1. An N self-luminous panel in which scan side electrodes and data side electrodes are arranged in a matrix, and a lenticular lens plate formed at the same pitch as the electrode pitch of the data side electrodes, The self-luminous panel is a stereoscopic image display device, wherein the data side electrodes are arranged in layers on the rear surface of the lenticular lens plate in a state of being shifted by 1 / N of the electrode pitch. 2. The stereoscopic image display device according to claim 1, wherein the self-luminous panel is a three-color multi-layer EL display.