KR100244143B1 - Multi screen device - Google Patents

Abstract

The present invention discloses an improved multi-screen device of a flat panel display.

Conventionally, when a multi-screen device is constituted by arranging device panels, there is a problem that a partition line appears in an image due to a gap therebetween.

According to the present invention, by providing a light diffusion plate in a gap and illuminating the gap, the difference in brightness between the gap and the panel is reduced, thereby weakening the outline of the gap and disappearing at a short distance, thereby improving the visibility of the multi-screen device.

Description

Multi-screen device

FIG. 1 is a partially enlarged front view showing a problem of a multi-screen device. FIG.

FIG. 2 is a cross-sectional view showing the adjacent ends of two panels resulting in the problem of FIG. 1; FIG.

FIG. 3 is a sectional view showing a basic configuration of a multi-screen device according to the present invention; FIG.

4a and 4b are block perspective views illustrating the construction principle of the inventive device.

5 and 6 are perspective views illustrating illumination means in the apparatus of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

P: Panel (of flat panel display) G: Gap (between panel)

1: light diffusing plate 2: lighting means

S: slope

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen device, and more particularly to a multi-screen device suitable for being constituted by a flat panel display device such as a PDP (Plasma Display Panel).

The multi-screen device is a device for arranging a large number of display elements to form a large screen. In FIG. 1, a multi-screen device 100 is shown in which a plurality of PDP panels P are arranged.

The biggest problem of such a multi-screen device 100 is that the effective screen of the panel P is small, so that a partition line of the width d1 is generated at the boundary where the plurality of panels P are adjacent to each other, The visibility of the multi-screen device 100 is greatly lowered because the image is displayed as being partitioned.

As shown in FIG. 2, each panel P includes electrodes E1 and E2 on two substrates P1 and P2 opposed to each other, as shown in FIG. 2, And the pixels are partitioned by the barrier ribs B, as shown in Fig.

Each panel P is formed by forming functional layers such as electrodes E1 and E2 and partition walls B on the substrates P1 and P2 and then bonding the functional layers to each other by side walls W. [

The width d1 of the partitioning line is equal to the distance between the inner ends of the outermost partition walls B inside the side walls W of the two panels P, that is, the thickness of the partition walls B and the thickness of the side walls W, B and the side wall W and the distance between the side wall W and the outside edge of the panel P and the distance between the panel P and the double side, When the screen device 100 is constructed, the partition lines must be prominently displayed.

Accordingly, an object of the present invention is to provide a multi-screen device capable of improving visibility by reducing the outline of a partition line when a multi-screen device is configured by arranging flat panel display device panels such as PDPs.

In order to achieve the above object, the multi-screen device according to the present invention is characterized in that a light diffusing plate is arranged in a space between the panels and the light diffusing plate is illuminated with an illuminating means.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

3, panels P of flat panel display devices such as PDPs are arranged in parallel to constitute a multi-screen device. In the gap between the panels P, a light diffusion plate 1 is arranged in accordance with the feature of the present invention, The means 2 illuminates the light diffusion plate 1 at a predetermined illuminance.

Preferably, a sloped surface S is formed at a side of the front panel side of the panel P so that the tip of the optical diffusion plate 1 has a mushroom head-shaped cross section. The illumination light from the illumination means 2 can be more efficiently diffused so as to kill the contour of the gap between the panels P. [

Here, the illuminance of the illuminating means 2 may be variable but may be set so that a predetermined fixed illuminance, for example, the brightness at the front of the light diffusing plate 1 is lower than the average brightness at the panel P have.

The principle that the outline of the partition line due to the gap is weakened when the gap between the panels P is illuminated through the optical diffusion plate 1 at a fixed illumination level will be described with reference to FIG.

In FIGS. 4A and 4B, the four panels P are cut away around the gap G of the adjoining "+" shape, but the case 4a does not illuminate the gap G at first.

In this case, assuming that the luminance (or roughness) of the gap G is 0 and the average luminance by image display on the effective screen of the panel P is 100, a luminance difference of 100 between the gap G and the panel P The user U recognizes the gap G as a contour line of a dark outline as shown in the enlargement circle.

4b, if the gap G is illuminated through the optical diffusion plate 1 to a predetermined illuminance, for example, the front luminance is 30, the luminance difference between the gap G and the panel P is 100-30 = 70 .

If we look at the mechanism where human vision recognizes the outline of things, it is based on the mixture of brightness contrast, color contrast, and both. In other words, the larger the difference between brightness and color, the more distinct the outline is recognized. In the case of similar colors, the similarity of brightness is not as clear as the contrast of brightness.

However, the flat panel display device such as a PDP has an average color of white (driving) to gray (non-driving), and the color of the gap G is dark gray, regardless of whether the panel P is in color or black and white. It can be seen that brightness is recognized by contrast.

Therefore, if the gap G between the panels P is illuminated as shown in FIG. 4B, even if the brightness does not fall below the average brightness of the panel P, the brightness difference is reduced. Therefore, the outline of the gap G It is faintly weakened.

Another consideration in recognizing the outline is the distance problem. As the distance increases, the outline of the object gradually disappears. As the outline of the outline becomes clear, the brightness or color contrast The larger the distance, the farther away.

That is, when the luminance difference between the gap G and the panel P is small as shown in FIG. 4B, the contour is lost at a distance closer to that of the case of FIG. In other words, when the multi-screen apparatuses of FIGS. 4A and 4B are placed at the same position and the user U observes the image gradually moving away from the same, the partition line by the outline of the gap G in the apparatus of FIG. , A parting line is still observed in the apparatus of FIG. 4a.

This difference is caused by the fact that the multi-screen device is installed mainly on the roof of the building or on one side of a large hall or square so that the user U sees an image at a considerable distance therefrom, It is possible to configure the multi-screen device in which the partition line is not recognized at the average observation position of the user U by appropriately adjusting the difference between the average brightness and the brightness of the gap G by the lighting means 2. [

The reason why the light diffusion plate 1 is required for the illumination of the gap G is that the light diffusion plate 1 is provided continuously to the narrow gap G between the panels P, The light diffusion plate 1 can be formed by forming a translucent synthetic resin or a glass (frosted glass) or the like in a long strip shape or the like.

For example, in the embodiment of FIG. 5, the illuminating means 2 may be provided in the longitudinal direction of the optical diffusing plate 1, And a lamp 2a provided through a projection lens 2b.

Since the gap G between the panels P is formed in a lattice shape in the multi-screen device using the tetragonal panel P, the optical diffusing plate 1 is also formed in a lattice shape, Even if the illumination means 2 is provided for each end of the multi-screen device, the illuminance of the illumination means 2 of FIG. 5 is lowered toward the center of the multi-screen device and the brightness of the intersection of the grid becomes higher than that of the other portions, Lighting is difficult.

In contrast, in the embodiment of FIG. 6, the illumination means 2 is constituted by an array of point light sources 2c such as LED (Light Emitting Diode). Each of the point light sources 2c is preferably integrally formed on a body 2d made of a material similar to the light diffusion plate 1 and inserted into a gap between the panels P so that the light diffusing plate 1, So as to exhibit substantially uniform illumination luminance as a whole.

Although the optical diffusing plate 1 and the body 2d of the illuminating means 2 are shown as being separated in the illustrated embodiment, the optical diffusing plate 1 and the body 2d may be made of the same synthetic resin or the like Or may be integrally formed. Such a configuration can be easily implemented by referring to a configuration in which a plurality of LEDs are integrally molded and fixed to one body when the LED panel is constructed.

As described above, according to the present invention, there is provided a multi-screen device having an excellent visibility by suppressing the recognition of a parting line and shortening a distance of disappearance of the parting line by reducing the brightness difference with the panel by illumination of the gap, It has excellent effect.

Claims (8)

A multi-screen device for arranging a plurality of flat panel display device panels and realizing a large image, characterized in that a light diffusion plate is arranged in a space between the panels, and the light diffusion plate is illuminated by a lighting device at a predetermined illuminance Lt; / RTI > The multi-screen apparatus according to claim 1, wherein the illuminance of the illumination means is set so that the front luminance of the light diffusing plate is lower than the average luminance at the time of driving the panel. The multi-screen apparatus according to claim 1, wherein the illumination means includes a projection lens and a lamp provided at an end of the light diffusing plate. 2. The multi-screen device according to claim 1, wherein the illumination means comprises an array of a plurality of point light sources. The multi-screen device according to any one of claims 1 to 4, wherein the plurality of point light sources are integrally formed on a body of a material similar to the optical diffusion plate, and are inserted into gaps between the panels. The multi-screen device according to claim 4, wherein the point light source is formed of an LED. 2. The multi-screen device according to claim 1, wherein the light diffusion plate is formed of a molding of a translucent material. The multi-screen device according to claim 1, wherein an inclined surface is formed at a side end of the front substrate of the panel, and a front end of the optical diffusion plate has a mushroom-head-shaped cross section.