JPH01142614A - Image display panel - Google Patents

Abstract

PURPOSE:To obtain a large-sized panel consisting of assemblages of small-sized display panels, the non-display parts of which are invisible, by disposing a transparent plate consisting of assemblages of Fresnel type convex lenses apart a specified space to the upper part of plural small-sized display panels which are disposed adjacently to each other on the same plane. CONSTITUTION:The non-display parts 4-1-4-4 exist and, therefore, a rectangular image constitutes the rectangular shape which is interrupted like 5-1-5-4 when the rectangular image is going to be displayed. However, non-display parts are invisible when the entire part is viewed from the front if a multi-optical axis eccentric Fresnel type convex lens 6 is disposed apart the specified space. The rectangular image is then visible as the continuous image. The multi-optical axis eccentric Fresnel type convex lens 6 is the assemblage of the eccentric Fresnel type convex lenses. The lens 6-1 acts to enlarge the image display part 2-1 toward a center 8 and the other eccentric Fresnel type convex lenses 6-2-6-4 act to enlarge the image display parts 2-2-2-4 respectively toward the center 8. The images are thereby observed as one large image screen over the entire part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an image display panel that can display a large screen by assembling a plurality of small display panels.

[Conventional technology]

As an example of a conventional technique that makes it possible to display a large screen by making the non-display areas at the boundaries between the panels invisible when a plurality of small display panels are assembled, Japanese Patent Laid-Open No. 60-20
There is one described in Publication No. 3915. This is a mechanism in which light rays from individual pixels of a small display panel are guided to the upper end of the light guide assembly, and
The light guide has a structure in which the cross section is larger at the upper end than at the lower end in contact with the pixel.

This structure is such that each display pixel is enlarged, so
The non-display portions at the boundaries between the small display panels are also completely covered by the upper end of the light guide assembly, making it possible to view a large-screen display image in which the non-display portions are not visible as a whole.

[Problem that the invention seeks to solve]

In the above conventional technology, in the case of color display using the number of pixels of each display panel or R, G, B pixels, the R, G,
It is necessary to optically bond a number of light guides corresponding to the number of triplets, where one triplet is a B pixel, to the liquid crystal panel surface. It is extremely difficult in many ways. Also, the length of the light guide that should be used depends on the size of the small display panels and the width of the non-display area between the small display panels, but assuming that the small display panels are about 5 inches diagonally. , a minimum length of 10 to 20 mm is required,
As a result, the overall weight becomes large. Furthermore, when the light from the pixels of the liquid crystal panel passes through the light guide, a light transmission loss occurs, resulting in a slight decrease in brightness.

The present invention aims to solve the above-mentioned manufacturing method problems, weight increase problems, and sight loss problems, and to obtain a large image display panel consisting of an aggregate of small display panels in which the non-display part cannot be seen. purpose.

[Means for solving problems]

The above purpose is to install a transparent plate consisting of an assembly of Fresnel-shaped convex lenses having optical axis centers corresponding to each small display panel, separated by a certain space above a plurality of small display panels arranged adjacent to each other on the same plane. This is achieved by arranging.

[Effect]

When the image display portions of individual small display panels arranged adjacent to each other on the same plane are viewed through a Fresnel-shaped convex lens placed above the small display panels, the display portions appear enlarged. One small display panel corresponds to one convex Fresnel lens, and since there are a plurality of combinations of the small display panel and the convex Fresnel lens, each of the plurality of small display panels is enlarged. At this time, by specifying the focal length of the Fresnel-shaped convex lens and the interval between the small display panel and the corresponding Fresnel-shaped convex lens, it is possible to enlarge the image display portion of the small display panel to a certain size. Here, if the image display portion is expanded to the edge of the small display panel, that is, the boundary between adjacent small display panels, a large image display panel can be obtained in which the non-display area near the boundary is not visible. Can be done.

In addition, in this case, by making the display contents in the periphery of the image display part of mutually adjacent small display panels the same, the viewing angle direction is not only the front direction but also 306 to 406 on one side.
It can be extended to a range of degrees.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of one embodiment of the present invention, and FIG.
) is a front view of the image display panel according to the present invention, and (b) is a front view of the image display panel according to the present invention.
FIG. 2 is an internal front view of the image display panel shown in FIG. 3A with the multi-optical axis decentered Fresnel convex lens removed.

In FIG. 1(b), four small display panels 1-1.
1-2.1-3.1-4 are image display parts 2-1 respectively
．． 2-2.2-3.2-4 and the essential peripheral non-displayed area where circuits, etc. are mounted 3-1.3-2.3-3.3-
4.4-1.4-2゜Constructed with 4-3.4-4 as the main part, non-displayed part 4-1.4-2.4-3.4-4
are arranged on the same plane with their end faces touching each other.

These four display panels 1-1.1-2.1-3゜1-
When displaying on a large screen in 4, for example, if you try to display a rectangular image, the non-display area 4-1.4-2.
4-3.4-4, the rectangular image is 5-1.5
It becomes an interrupted rectangle like -2.5-3.5-4. However, as shown in FIG. 1(a), by arranging the multi-optical axis decentered Fresnel-shaped convex lens 6 with a certain space in the state shown in FIG. 1(b), there is no display when the whole is viewed from the front. The portion 4-1.4-2.4-3.4-4 becomes invisible and the rectangular image becomes visible continuously as shown at 5. In this case, the multi-optical axis eccentric Fresnel convex lens 6 has four optical axes 7-1.7-2.7-3.7-4, and these optical axes 7-1.7-2°7 -3.7-4 is the corner part 8-1.8 of the image display part 2-1.2-2゜2-3.2-4
-2.8-3.8-4.

The multi-optical axis eccentric Fresnel convex lens 6 is an assembly of eccentric Fresnel convex lenses 6-1.6-2.6-3.6-4, and the lens 6-1 has a center 8 centered around the image display portion 2-1. Another eccentric Fresnel convex lens 6-2.
6-3.6-4 is the image display part 2-2.2-3.2-4
It acts to enlarge each in the direction of the center 8. The boundary portion 9 between the eccentric Fresnel convex lenses 6-1.6-2.6-3.6-4 is the non-displayed portion 4-14-2.4-3.
It is located directly above the contact portion of the end face of 4-4, and although it may look like a line, it rarely becomes an obstacle when viewing the screen.

Next, the principle that an image appears to be enlarged in one direction using an eccentric Fresnel-like convex lens and a specific example of optical constants will be explained.

FIG. 2 is an explanatory diagram of image enlargement using a convex lens in the form of an eccentric Fresnel lens. When f and a<f, b is negative and larger than a. That is, visual image B becomes a larger virtual image than object A. At this time, one end of the object A is connected to the optical axis L1 of the lens L.
If it is placed above, one end of the beam is on the top of the visual image B, and the object A is magnified only in the direction away from the optical axis L1, and the visual image B is
(virtual image) can be seen.

FIG. 3 shows a state in which two eccentric Fresnel-shaped convex lenses L and L' are used to make the visual images of two objects coincide with the tips of the images. In addition, at this time, not only the front direction but also approximately 30° relative to the front direction.
Even when viewed from any viewing angle direction within ~40°, the entire image is configured to have no non-display portions.

In the figure, the above contents will be explained in detail.

When objects AZ and A2' are on the two optical axes LIIL+', the object A2. Am' is a Fresnel convex lens L, L
When viewed from the front through ', these At, A
The visual image of t' is a continuous image with no non-displayed parts like Bz and Bz', which can be viewed with light rays M and M'. In addition, when viewing images not from the front direction of the display panel but from an oblique direction, for example from the direction of light rays N and N', in order for the images on the two small display panels to appear consecutively, the optical axis must be Object A3 on LI + Ll', AI
' should exist. By doing this, the visual image of the two objects A3 and A+' becomes B
3. B,', and it becomes possible to visually recognize a continuous image with no non-displayed portions using the light beams N, N'. Similarly, if the viewing direction is on the opposite side of NN' with respect to the ray MM', if the objects are set as AI, A,,', the viewing images will be B,,B!, respectively. ', and it is possible to visually recognize a continuous image without any non-displayed parts. The key point to realize the above state is the part of object A3-AI = ΔA, object A,'-A
, '=ΔA' have the same content, that is, the image content in the periphery of the image display portion of the two small display panels is the same.

Next, for small display panels arranged on the same plane,
A specific example of how eccentric Fresnel convex lenses with focal lengths should be arranged to achieve the objective will be described.

First, in FIG. 1(b), small display panels 1-1.
Image display part 2-1.2-2 of 1-2.1-3.1-4
．． 2-3.2-4 Each size is 5 inches diagonally (12
7 mm), width 4 inches (102 mm), height width 3 inches (76 mm), and blank area 4-1.4-2.4-
3. Assume that the width of each diagonal portion of 4-4 is 10 mm. Further, the distance between the multi-optical axis decentered Fresnel convex lens 6 shown in FIG. 1(a) and the panel 1-1.1-2.1-3.1-4 is set to 20 mm. Here, by arranging the lens 6, the objective can be achieved if the image display part with a diagonal of 127 mm can be viewed as an image with a diagonal of 137 mm (diagonal length of the image display part + diagonal length of the non-display part). .

Next, the focal length f of the lens to be used and the position of the visual image will be estimated from the following lens formula (2) and lens magnification relationship (2).

1-=m □■ Substituting 1,094 to find b and f, b-21,
9mm, f = 233mm. That is, f=23
A 3 mm multi-optical axis decentered Fresnel convex lens 6 is placed at a distance of 20 mm from the surface of the 8-panel panel 1-1.1-2.1-3.1-4, with each optical axis aligned as shown in FIG. 1(a). 7-1
．． 7-2.7-3.7-4 and the respective corner portions 81.8-2.8-3.8-4 shown in FIG. , the visual image 5 without the non-display portion 4-1.4-2.4-3.4-4 can be seen from the front direction. At this time, the position of the visual image 5 is 21.9 mm away from the lens 6 toward its lower surface, and the distance to the panel 1-1.1-2.1-3°1-4 is 20 mm.
It exists slightly further away than mm. In this case,
The entire image display area has a diagonal of approximately 11 inches (274 mm), which is basically the same size as the lens 6, and an image that is approximately 1.1 times larger than the original image can be viewed. Also, here, for example, the width of the diagonal portions of the non-display portions 4-1.4-2.4-3.4-4 is not 10 mm, but is 5 mm, and the remaining portions (5 mm each) ), if the image contents of adjacent small display panels are displayed mutually, it can be viewed not only from the front of the display panel but also from diagonal directions.
The entire image can be visually recognized as a continuous image.

The viewing angle range is approximately 30" due to the focal length of the Fresnel convex lens, 11f, and other optical constants such as a and ΔA.
It can be adjusted within the range of ~40@.

FIG. 4 is a KK'i cross-sectional view of the embodiment of the image display panel of the present invention shown in FIG. 1(a).

In the same figure, when the entire display panel becomes large and the multi-optical axis eccentric Fresnel convex lens 6 is bent, a substantially triangular prism-shaped lens support 10 is moved to the non-displayed portion 4-1.4-2.
．． It is preferable to insert it between 4-3.4-4 and the boundary portion of the lens 6. Even with the installation of this lens support 10,
Rays M, M'.

As shown in M″1M″, image display portion 2-1゜2-2
．． The continuity of the image displayed in 2-3.2-4 is hardly affected and can be viewed as one large image.

FIG. 5 is a front view of another embodiment of the image display panel of the present invention. This embodiment differs from the embodiment shown in FIG.
,6'-4 optical axis 7'-1゜7'-2,7'-3,7
'-4 is not directly above the corner portion 8-1°8-2.8-3.8-4, but is located in the direction of the center 8'. According to this configuration, the non-displayed portion 4-1.4- in FIG. 1(b)
2.4-3.4-4 is no longer visible, the display portion 2-1.2-2.2-3.2-4 is directed outward, that is, the non-display portion 3-1.3-2. It also appears slightly enlarged in the 3-3° and 3-4 directions.

Note that the circular stripes drawn on the multi-optical axis decentered Fresnel convex lens 6 and 6' in FIGS. 1(a) and 5 schematically represent Fresnel sections.

FIGS. 6(a) and 6(b) are explanatory diagrams of still another embodiment of the image display panel of the present invention, showing a case where one large image is obtained using nine small display panels; ) is a front view, and figure (b) is a diagram showing an example of the CC' cross section of figure (a) and the light ray N'' from the screen.The multi-optical axis decentered Fresnel convex lens 6'' in this embodiment is 1 The image display area 2' is enlarged by these Fresnel-shaped convex lenses, and the non-display area 4'
cannot be visually recognized, and the entire screen is viewed as one screen.

At this time, it is necessary that the positional relationship between the nine Fresnel-shaped convex lenses constituting the L lens 6'' and the nine image display portions 2' be slightly different between the central portion and the peripheral portion. .

In the above, the number of small panels that make up the whole is
Although the case of 4 panels and the case of 9 panel panels have been described, the present invention also makes it possible to make the non-display part invisible and view the entire screen as one screen even for configurations consisting of a plurality of small display panels other than those. Make it. Further, a multi-optical axis decentered Fresnel convex lens can be easily manufactured by molding a plastic material such as acrylic or styrene, and can be manufactured relatively inexpensively. Further, by arranging another transparent protective cover outside the multi-optical axis eccentric Fresnel convex lens, the Fresnel convex lens can be protected from dirt and scratches.

Further, in the above description, the type of small display panel was not specified, but it may be any type of panel such as a liquid crystal panel, a plasma panel, an EL panel, etc.

Furthermore, by configuring the multi-optical axis decentered Fresnel convex lens to be detachable, it is possible to view images on each of the small display panels.

〔Effect of the invention〕

As explained above, according to the present invention, when a plurality of small display panels are arranged on the same plane, even if there are some non-display areas between the small display panels, the non-display areas can be removed. , it is possible to provide an image display panel with excellent functions that can be viewed as a whole as one large screen.

[Brief explanation of the drawing]

FIG. 1(a) is a front view of the image display panel of the present invention - Example, FIG. 1(b) is a front view showing the internal state of the image display panel of the present invention - Example, and FIGS. 2 and 3 are FIG. 4 is a sectional view taken along the line KK' in FIG. 1(a) and an explanatory diagram of the emitted light beam. FIG. 5 is a front view of another embodiment of the present invention. FIG. 6(a) is a front view of another embodiment of the image display panel of the present invention, and FIG. 6(b) is a sectional view taken along line CC' in FIG. 6(a) and an explanatory view of emitted light rays. 1-1.1-2.1-3.1-4...Small display panel, 2-1.2-2.2-3.2-4.2'
・・・・・・・・・Image display part, 3-1.3-2.3
-3゜3-4. 4-1. 4-2. 4-3. 4-
4. 4'・・・・・・No display part, 5.5-1
．． 5-2.5-3゜5-4...... Rectangular image, 6.6', 6"...... Multi-optical axis decentered Fresnel convex lens, 6-1 .6-2゜6-3.6-4.6'
-1,6'-2,6'-3゜6'-4,L...
...Eccentric Fresnel convex lens, 7-1.7-2.7-
3.7-4.7'-1, 7'-2, 7'-3, 7'-4
,L,,L,'...Optical axis, 8,8'...
・・・・・・Center, 8-1.8-2.8-3.8-4
...... Corner section, 9... Boundary section, 10... Lens support, A, A'
,A,,A2゜A++ + A+'+ A2', As
'・・・・・・Object, B. B', B+, Bz, B3, B+', Bz', B
z'...Visual image, F,,F,',F2.
F2'...Focus, M, M', M"
, M", N, N', N"... Ray of light. Figure 1 (b) Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] 1. An image display panel consisting of a plurality of display panels arranged adjacent to each other on the same plane, and a transparent cover arranged on the upper surface of the plurality of display panels, wherein the transparent cover is arranged on the top of the plurality of display panels. It is characterized in that it is constructed by forming an assembly of Fresnel-shaped convex lenses each having an optical axis center corresponding to each of the individual display panels, so that the non-display areas between the plurality of display panels become invisible. Image display panel. 2. An image display panel according to claim 1, characterized in that the display contents in the periphery of the image display portion of the plurality of display panels are the same on adjacent display panels. 3. The image display panel according to claim 1, wherein the transparent cover is a composite plate of an aggregate of Fresnel-shaped convex lenses and a transparent plate having no lens function.