JPH0210394A - Image display panel and fresnel lens applied to the same - Google Patents

Abstract

PURPOSE:To enable large-screen monitoring with constant visual characteristics without a decrease in brightness nor aberrations by arranging Fresnel lenses in front of plural small-sized panels, and providing plural centers of an optical axis and displaying peripheral parts one over another. CONSTITUTION:The Fresnel convex lenses (5-1)-(5-4) which have plane or concave prisms on a panel side and convex prisms on the opposite side are arranged to constant intervals to the small-sized display panels (1-1)-(1-4) formed adjacently on the same plane and optical axis centers (6-1)-(1-4) corresponding to the respective panels are provided. Further, the display image contents of the peripheral part are displayed so that contents of adjacent panels overlap with one another. Consequently, a panel display is enlarged through a lens and seen up to a border part of the display panel and the large-sized image display panel where non-display parts (4-1)-(1-4) are invisible is obtained. The respective characteristics of the Fresnel lenses are combined to adjust even aberrations and visual characteristics.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is mainly applicable to a plurality of small display panels 'f! : This relates to an image display panel that can be assembled to display a large screen, and a 7-renel lens applied to the image display panel.

[Conventional technology]

Multiple small display screens? As an example of conventional technology that makes it possible to display a large screen by making the non-display areas between the display screens invisible when they are assembled together, Japanese Patent Publication No. 53-4765
There is a description in Publication No. 2.

This is achieved by arranging a plurality of plaques/tubes, which are image display devices, closely together, and arranging convex lenses each having an optical axis center in front of the plaques/tubes corresponding to the display surfaces of the cathode ray tubes.

In this method, the displayed image is magnified by a convex lens corresponding to each cathode ray tube display area, and as a result, the non-display area between each cathode ray tube display surface becomes invisible, making it possible to see a continuous large screen image. It becomes like this.

[Problems to be Solved by the Invention] In the above-mentioned prior art, a convex lens is used to obtain a constant viewing angle characteristic, i.e., a characteristic in which the displayed image looks the same when viewed from various angles as when viewed from the front. How to arrange the
No consideration was given to the shape.

As disclosed in the above-mentioned prior art, when the cathode ray tubes are arranged in close contact with each other L7, there are at least 20 or more non-display areas between the cathode ray tubes.

When the cathode ray tube screen size is 20 inches diagonally, the non-display area has a width of 5 - or more in the vertical and horizontal dimensions. Therefore, in order to prevent such wide non-display areas from occurring and to obtain constant viewing angle characteristics, forming the convex portion of the convex lens on the surface of the gold cathode ray tube screen will not achieve the purpose. In the adjacent part of each convex lens, even if sufficient transmitted light is obtained from one convex lens and a bright image can be seen, the image cannot be seen from the other convex lens due to surface reflection of the lens. This is also due to the occurrence of a large amount of aberration. Therefore, the arrangement method, shape, etc. of the convex lens used here are very important.

By the way, in the above-mentioned conventional technology, a cathode ray tube is used as an image display device, but a display panel may also be used in other ways.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to sufficiently solve the problems of preventing a decrease in brightness and preventing a large amount of aberrations that occur when obtaining a constant viewing angle characteristic while also eliminating the large amount of non-display areas as described above. It is an object of the present invention to provide a large-sized image display panel consisting of an assembly of small-sized display panels.

[Failure to solve the problem]

In order to achieve all of the above objects, the present invention provides a method in which a plurality of small display panels arranged adjacent to each other on the same plane are placed in front of a plurality of small display panels, separated by a certain space, so that the surface facing the small display panels is a flat surface. And the other side? A Fresnel convex lens formed of a convex prism, or a Fresnel convex lens formed of a concave prism on the surface facing the small display panel and a convex prism on the opposite surface, and these Fresnel convex lenses In addition, a plurality of optical axis centers are provided corresponding to each small display panel.

Furthermore, in the case of a small display panel, the display image contents in the peripheral area are partially overlapped and displayed on mutually adjacent small display panels.

[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 convex lens placed in front of the small display panels, the display portions appear enlarged.

One small display panel corresponds to one Fresnel convex lens, and since there are multiple combinations of these small display panels and Fresnel convex T/lens lenses, multiple small display panels Each will be enlarged.

At this time, by specifying the focal length of each lens of the Fresnel convex lens and the distance between the small display panel and the corresponding lens of the Fresnel convex lens, it is possible to enlarge the image display portion of the small display panel to a certain size. I can do it. Therefore, if the image display portion is expanded to the edge of the small display panel and the boundary between adjacent small display panels,
It is possible to provide a large image display panel in which the non-display portion near the boundary cannot be seen.

In addition, by making the display contents of the peripheral areas of the image display portions of mutually adjacent small display panels the same, it becomes possible to view not only from the front direction but also from the left and right or from the top and bottom.

If a convex prism of a 7 Fresnel convex lens is formed on the surface facing the small display panel, the light reflection loss and distortion generated near the junction of each lens of the 7 Fresnel convex lens will increase, making it difficult to view the correct displayed image. It becomes impossible to see.

However, in the 7-Renel convex lens used in the image display panel of the present invention, the surface facing the small display panel is formed with a flat or concave prism, and the opposite surface is formed with a convex prism. Even when viewing from the left and right or top and bottom directions, light reflection loss and distortion near the joints of the Fresnel convex lenses can be minimized, allowing you to view large screens without any discomfort. becomes.

〔Example〕

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

FIG. 1(a) is a front view showing an image display panel as a first embodiment of the present invention.

This embodiment is composed of four small display panels.

FIG. 1(b) is a front view of FIG. 1(a) with the multi-optical axis decentered Fresnel convex lens 5, which is a main component of the present invention, removed.

In FIG. 1(b), four small display panels 1-1°1-2, 1-5, and 1-4 have image display portions 2-1°2-2, 2-3, and 2-4, respectively. Necessary peripheral non-display areas equipped with circuits, etc. 3-1, 5-2, 5
-3.3-4.4-1.

4-2, 4-! 1, 4-4 as the main parts, and non-displayed parts 4-1, 4-2, 4-3, 4-
4 are arranged on the same plane with their end surfaces touching each other.

In addition, in FIG. 1(b), the non-displayed part 4-1゜4-
2, 4-5, and the display area adjacent to 4-4 as a4. b
,.

C, la2, b2 + c2, but as shown in FIG. It is. In these overlapping display parts, parts a and b2 and parts a2 and 7 have the same display content, so these parts are O, + bl T b2
, when array 2 is displayed like c2, c+ l b
When array 9 is displayed like j r 81 + 02, Q4. Array 1 as a2゜b2 + 02
When displayed, each image becomes a similar continuous image.

Note that the above principle will be explained in detail later.

Four small display panels 1-1, 1-2, 1-3,
1-4, when there is no multi-optical axis decentered Fresnel convex lens 5, as shown in FIG. 1(b), the non-display portions 4-1, 4-2, 4-3, 4- 4, the image is interrupted, but as shown in FIG. 1(a), the small display panel 1-1.1-2.4 as shown in FIG. 1(b).
By arranging a multi-optical axis decentered Fresnel convex lens 5 at a certain distance in front of 1-5° 1-4, the non-display portions 4-1, 4-2, 4-3, 4-4 are The image disappears and the images appear to be continuous.

In FIG. 1(a), a multi-optical axis decentered Fresnel convex lens 5
has four optical axes 6-1, 6-2, 6-5, and 6-4;
, 6-4 are image display parts 2-1, 2-2, 2-3
, 2-4 coker section 7-1 , 7-2 , 7-3 ,
7-4 are located directly in front of each other.

The multi-optical axis decentered Fresnel convex lens 5 is a collection of decentered Fresnel convex lenses 5-1.5-2°5-3.5-4, and the decentered Fresnel convex lens 5-1 is centered at the image display portion 2-1. The other eccentric Fresnel convex lenses 5-2.5-3.5-4 also have the effect of enlarging in the direction of the lens 5.
- As in the case of 1, image display part 2-2.2-5.2-
4 in the direction of the center 8.

Next, the principle that when the small display panel 1-1.1-2.1-5.1-4 is viewed through the entire multi-optical axis decentered Fresnel convex lens 5, images appear continuous will be explained.

Figures 2 (a), (b), and (c) show the image display panel in Figure 1 when viewed from the front, from above, and from below, respectively. This is an explanatory diagram showing all viewing conditions.

FIG. 2(a) shows the view from the front direction, and shows the focal length f of the eccentric Fresnel convex lens 5-1.5-5,
If the distance a between the small display panel 1-1.1-5 and the eccentric Fresnel convex lens 5-1.5-3 is set optimally, the non-display area 4-1.4-5, the overlapping display area &, + bl +
&21 b2ノ'75 at l a2 can be made invisible.

Therefore, these eccentric Fresnel convex lenses 5-1°5-3
The visible display area near the boundary of is , b2, and virtual image 1 when viewing image display area 2-1.2-3.
When 2'-1 and 2'-3 are set to 2'-1 and 2'-3, it becomes possible to view continuous virtual images in the array c;, , ;□, C'2 near the boundary. As mentioned before, display parts a, I b,
Among 1c+ + a2 and b2*02, a and b2 are set to have the same display content, and b and 82 are set to have the same display content, so one of the display parts is...
If the displayed content of b2 is visible to the eye, a continuous image can be obtained.

Is Fig. 2(b) the display part? It shows the state of the celebration from a viewing angle of θ from the front, slightly above the horizontal axis.
At this moment, the non-display area 4-1, 4-5 and one of the overlapping display areas &2#b2 cannot be seen. That is, CI,
It is possible to view continuous virtual images in the array b, , a, lc'2.

Here, assuming that the viewing angle is greater than the viewing angle θ, the light transmitted through the convex lens 5-1 near the boundary of the convex lenses 5-1 and 5-4 is the light emitted from the non-display area 4-1. Therefore, continuous images cannot be viewed.

On the other hand, when viewed from an angle smaller than the viewing angle θ, a continuous virtual image can always be viewed. Therefore, Fig. 2(b)
In the shape of , the maximum viewing angle is θ.

Figure 2(c) shows the viewing state of the display section from a viewing angle of θ with respect to the horizontal axis, slightly below the front.
At this time, the non-display area 4-1, 4-3 and one of the overlapping display areas a, , b are not visible to the eye. That is, a
t2. It becomes possible to view continuous virtual images in the arrangement: , ;, , c'2.

Next, the viewing angle θ will be specifically explained.

The image formation formula established in the paraxial region of the lens can be expressed as (1).

Assuming that equation (1) holds true even outside the paraxial region,
Maximum viewing angle θ. , the output light angle θ1 from the display section at that time
, the magnification m of the visual image can be derived based on equation (1), and the result can be expressed as (2), (3), and (4). In addition, (2), (3), (4
) are shown in Figure 3.

1/2 ho: Display height f: Focal length of eccentric Fresnel convex lens a: Small display panel, distance between eccentric Fresnel convex lenses From formulas (2), (3), and (4), f is small,
When a is large, the maximum viewing angle θ. is large, and it can be seen that when a is small, the angle θ1 of the light emitted from the display section is large.

In addition, the distance a between the small display panel and the eccentric Fresnel convex lens is
The closer the distance is to the focal length f, the larger the magnification m of the viewed virtual image becomes.

Next, the maximum viewing angle θ. Regarding the angle of light emitted from the second display section θ1° and the visual image magnification m, a series of concrete trial calculation results using (2), (3), and (4) will be described.

The aim was to obtain a display image of about 10 inches with a small display unit of 5 inches/4 channels, and each constant was assumed as follows.

D/2=133. f=200. h0=127. a=50
According to the above assumption, θ with respect to the beam ray. , θ1 is θo,
25°, θ1 are both 11°, and Jl for the ray angle is θU #48°. Also, the magnification m is approximately 1.2 times and 1
, is a very small value, but it is possible to sufficiently cover one non-display area and one overlapping display area with this level of magnification.

By the way, since the calculation formulas (2), (3), and (4) are derived from the paraxial imaging formula (1), errors occur when applied outside the paraxial region.

That is, according to the above equation (2), the maximum viewing angle θ. Although it is possible to obtain a continuous visual image without aberrations at all angles within the range of Generates aberration.

The specific phenomenon of the aberration generation is shown in Figure 4 (a) and (b).
As shown in FIG. 1, a part of the image is missing when viewed from an oblique direction, so-called image defects are caused by the amount of aberration H1, Δd.
It will come as H2. This is the maximum viewing angle θ. It is noticeable when viewed through the joint part of the eccentric 7-Lesnel convex lens 5-1.5-5 from an angle of .

The transmitted light ray LI of the eccentric 7-Renel convex lens 5-1 and the transmitted light ray LI of the eccentric 7-Renel convex lens 5-3 are originally 4 at the end of the display section a of the small display panel 1-1, and the small display panel 1. The light ray should be emitted from 2 at the end of the -3 overlap display area b2, but in many cases, the emission point of the ray is 6 points or 4 points inside the end of 2. It becomes. When viewing images, K, K, = 2dH + d.

10ΔdH1 part, or K4=2dH+do+Δ
Since the dH2 portion is not viewed, it should be seen as an image, but the H2 portion is missing, and the image loss becomes an aberration. The image defects and aberrations ΔdH1 and ΔdH2 become larger as the maximum viewing angle θ is increased.

In the image display panel of this embodiment, it is very important to keep the aberrations as low as possible due to image defects.

Figure 4(a) shows an eccentric Fresnel convex/Z 5-1.5-3
Figure 2 (a), (b) shows the Fresnel prism surface of
Similar to the case shown in (0), when the viewing side is set, in this case, the Fresnel prism surface shown in Figure 81!4 (b) is connected to the small display panel 1-1.1-5. There is less aberration due to image defects than when formed on the opposing surface. The focal length f of the eccentric Fresnel convex lens, the distance a between the eccentric Fresnel convex lens and the small display panel, and the set viewing angle θ. In most cases, the image defect caused by the aberration ΔdH1 in the case of FIG. 4(a) is much smaller than the aberration ΔdH2 caused by the image defect in the case of FIG. 4(b). - For example, those aberrations Δ at a visual angle of 10°
When dH1 and ΔdH2i were compared, the value of ΔdH2 was approximately 115 for the old one.

The main cause of the difference in the magnitude of aberration due to image defects in Figure 4 (←) and (b) is based on the following reasons.

In the case of FIG. 4(a) and also in the case of FIG. 4(b),
At the end of the display section a, the outgoing light angle θ11. θt,
is the maximum viewing angle θ. 2 at the end of the overlapping display area, and 5. K
The angle θ θ′ of the light emitted from 4 is larger than θ. Therefore, the light ray L5 is emitted from point K4, which is shifted from the light emission point 2 calculated by the viewing angle calculation formula (2).

Furthermore, in the case of FIG. 4(b), the angle of incidence of the light @L at the point of incidence on the decentered Fresnel convex lens 5-3 is u,!, where the Fresnel prism angle litα' is taken as the angle of incidence of the light @L. +α', and the angle of incidence is approximately equal to the Fresnel prism angle α' compared to the incident angle Ui in the case of FIG. 4(a). Therefore, in the case of FIG. 4(b), the amount of aberration that occurs is larger than in the case of FIG. 4<a), that is, ΔdH2 is larger than Δd)li.

Also, the difference in the angle of incidence of the light rays at L can be seen as a difference in light transmittance, and the case shown in Fig. 4(a) is better than the case shown in Fig. 4(b).
The light transmittance is higher than in the case of .

From the above, an image display panel in which an eccentric Fresnel convex lens consisting of a flat surface on one side and a Fresnel prism surface on one side is arranged in front of a plurality of small display panels is shown in FIG.
It is more important to use the method shown in FIG. 4(a) than the method shown in b) in order to obtain an appropriate large-screen image.

FIG. 5 is an explanatory diagram showing the viewing state when the image display panel according to the second embodiment of the present invention is viewed from all around the central part above.

The structural features of this embodiment are the small display network 1-
1. Eccentric Fresnel lens placed in front of 1-5 9
-1.9-3'jzThe reason lies in the fact that it is a meniscus convex lens.

Eccentric Fresnel convex lens 9-1.9-51d, convex Fresnel prism on viewing side, small display) (Nel 1-1.1-3
The surface facing the surface is formed into a concave) 1/Nel prism, and the Fresnel prism angle of each surface is β.

When γ is set, β>r, and a meniscus convex lens toner having a convex lens function as a whole is formed.

At this time, the angle of incidence of the light beam on the deflecting Fresnel convex lens 9-5 is the angle θ1 of the light emitted from the small display panel 1-3.
．． Therefore, the image defect 1- shown in FIG. 4(a) in the first embodiment FJ of the present invention described above can be an aberration dH3, which is smaller than the aberration dH1.

In Fig. 6, the image defect in the case of Fig. 41g (b) in which the convex Fresnel prism surface is opposed to a small gold display panel is due to aberration, and Figs. 1, 2, 3, and 4 (a) The image defect in the case of the first embodiment of the present invention shown in FIG.
7. Image defects in the case of the second embodiment of the present invention are compared with aberrations, respectively.

The characteristics shown in Fig. 6 are as follows: total exposure of the non-display area between the small display panels by 4, small display panel, eccentricity 71/total distance between the convex lenses of about 15, thickness of the eccentric Fresnel lens il, and refraction of the material of the eccentric Fresnel convex lens. This is the case when the weight is set to 1.49, and if these settings are used, the absolute value of the amount of aberration will change in the case of image defects. However, the image defects in the five cases do not cause a large change in the relative difference in aberration.

The image defect zero aberration in the first and second embodiments of the present invention can be made much smaller than the aberration when the Fresnel prism surface is set on the small display panel side. . The image loss depends on the permissible level of aberration, but if it is about 0.5 and 1.0, it is possible to obtain a viewing angle of about ±30° with optimal design.

FIGS. 7(a), (b), (o), and (d) are partial cross-sectional views showing other specific examples of the multi-optical axis eccentric Frenet A lens applied to the image display panel according to the present invention, respectively. Ru.

Figure 7(a) shows a case where two multi-optical axis decentered Fresnel convex lenses, one side of which is a flat surface and the other side of which is a Fresnel prism surface, are in contact or glued together. Figure 7(b) shows a multi-optical axis decentered Fresnel convex lens. This is a case where two sheets are arranged and formed at a certain distance apart.

In Figures 7(e) and 7(d), one of the two multi-optical axis decentered Fresnel convex lenses has a flat surface.

The other is a multi-optical-axis convex Fresnel lens with a concave Fresnel prism surface on one side, and the other is a multi-optical-axis polarized Fresnel convex lens with a Fresnel prism surface with one side flat and the other side convex. . FIG. 7(c) shows the case where the two multi-optical axis eccentric Fresnel convex lenses are in full contact or are bonded together, and FIG. 7(ci) shows the two multi-optical axis eccentric Fresnel convex lenses separated by a certain distance. This is the case where the arrangement is formed.

Figure 8(a), (+3).

(c) and (d) are partial cross-sectional views each showing a specific example of a structure of six multi-optical axis decentered Fresnel lenses.

By making the multi-optical axis decentered Fresnel lens into multiple lenses such as 2-element, 5-element, and even 4-element structures, it is possible to reduce aberrations and improve the ease of molding of the lens.
When you get an advantage from a certain point, it's time to roll.

FIG. 9 shows the sixth embodiment of the present invention and 1. FIG. 3 is a front view showing the image display panel of the first embodiment.

In this embodiment, the four optical axes 6', 6'-2, 6'-3, and 6-4 of the multi-optical axis decentered Fresnel lens 5 are located slightly from the corner of the image display portion of the small display panel. It is set to the point inside.

In such a configuration, the display image of the small display panel is the outer periphery of the display panel, the non-display area 3 in FIG. 1(b).
-1, 5-2, 3-3, 3-4 are also enlarged in the force direction, and the non-displayed portions 3-1, 3-2, 3-3, )4
It is also possible to make it invisible.

FIG. 10 is a front view showing the image display panel of Embodiment 4 and 1 to 1 of the present invention.

In this embodiment, it is composed of two small display panels.

Further, FIG. 11(a) is a front view showing an image display panel as a fifth embodiment of the present invention, and FIG. 11(b) is a front view of an image display panel as a fifth embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a cross section taken along line AA' in FIG. Note that FIG. 11(b) shows the direction of the emitted light beam as well as the cross section of the image display panel.

In this embodiment, it is composed of nine small display panels, and the positional relationship between the nine Fresnel lenses constituting the multi-optical axis decentered Fresnel convex lens 5 and the nine image display parts is as follows.
It is necessary to make the peripheral part and the central part slightly different.

In the above, cases have been described in which the number of small display panels constituting the whole is 2, 4, and 9. However, the present invention relates to a structure consisting of a plurality of small display panels other than these numbers. It also makes the non-displayed parts invisible, allowing you to view the entire screen as one screen.

Incidentally, a multi-optical axis eccentric 7-Renel convex lens can be molded and manufactured at a relatively low cost using a plastic material such as acrylic or styrene. Furthermore, if all other transparent protective covers are placed outside the multi-optical axis decentered Fresnel convex lens, the Fresnel convex lens can be protected from dirt and scratches.

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

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

〔Effect of the invention〕

As described 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 practical viewing angle is about ±30°. It is possible to easily obtain an image display panel that makes the non-display part invisible within a certain range, and has certain visual characteristics so that the entire screen becomes one large screen that can be viewed with envy.

[Brief explanation of the drawing]

Figure 1(a) is a front view showing an image display panel as a first embodiment of the present invention, and Figure 1J(b) is the same as in Figure 1(a) with the multi-optical axis decentered Fresnel convex lens removed. FIG. 2 is an explanatory view showing the jealously-shaped portion when looking around the central portion in the first embodiment of the present invention; FIG. 3 is a front view showing the state;
The figure is an explanatory diagram for explaining the viewing angle calculation formula in the first embodiment of the present invention, and FIG. figure,
FIG. 4(b) is an explanatory diagram for explaining the aberration of image defects that occur when the Fresnel prism surface of the decentered Fresnel convex lens is set on the small display panel side, and FIG. 5 is a diagram showing the second embodiment of the present invention. FIG. 6 is an explanatory diagram showing the viewing angle a when viewing the vicinity of the center of an image display panel as shown in FIG. In the case of the second embodiment, FIG. 7 is a characteristic diagram comparing the case where the Fresnel prism surface of the eccentric Fresnel convex lens is set on the small display panel side. FIG. 8 is a partial sectional view showing a case of a two-lens configuration as a specific example of an optical axis decentered Fresnel convex lens; FIG. The figure is a front view showing an image display panel as a third embodiment of the invention, FIG. 10 is a front view showing an image display panel as a fourth embodiment of the invention, and FIG. FIG. 11(b) is a front view showing an image display panel as a fifth embodiment of the invention.
FIG. 1 is a sectional view showing a cross section taken along line A-A in FIG. 1(a). 1-1.1-2.1-3.1-4...Small display panel 2-1, 2-2, 2-3, 2-4, 2...Image display portion 5-1, 3- 2, 3-3, 3-4,
4-1, 4-2, 4-3, 4-4. 4'...Non-displayed portion 5.5.5.5...Multi-optical axis eccentric 7-Renel convex lens 5-1, 5-2, 5-5, 5-4, 9-1,
9-3... Eccentric Fresnel convex lens 6-1, 6-2, 6-5, 6-4, 6-1,
6-2, 6-3, 6-4. 6-1.6-2... Optical axis 7-1, 7-2, 7-3, 7-4... Display portion corner portion 8... Screen center al r a2 + b, + b2...・Peripheral overlapping display portion C1, Q2... Peripheral display portion 81+a2+b,+b2...Virtual image of the surrounding overlapping display portion Cv+02...Virtual image of the surrounding display portion 2-1.2-3...Image Virtual image θ of display portion...Visual angle θ...Maximum viewing angle ho...Display section height θ J θ θ' θ θ', 6. Small display panel 11
11 11j ill 151 15 Outgoing light angle do...Non-display area width dH...Overlapping display area width ΔdH1, ΔdH2, ΔdH3... Image loss is aberration D/2
...1/2f of the aperture diameter of the eccentric Fresnel convex lens...Focal length a of the eccentric 7-Resnel convex lens...Small display panel, distance between the eccentric 7-Resnel convex lenses α, α', β, r...Fresnel prism angle .

Claims (1)

[Scope of Claims] 1. In an image display panel consisting of a plurality of display panels arranged adjacent to each other on the same plane, an image display panel on the side on which the display panels are arranged is placed at a certain distance in front of the plurality of display panels. An image characterized in that Fresnel convex lenses each having a flat surface and a convex prism surface on the opposite side and having a plurality of optical axis centers corresponding to each display panel are arranged. display panel. 2. In an image display panel consisting of a plurality of display panels arranged adjacent to each other on the same plane, the surface on the side on which the display panels are arranged is a concave prism, spaced a certain distance in front of the plurality of display panels, An image display panel characterized in that Fresnel convex lenses each having a convex prism on its opposite surface and having a plurality of optical axis centers corresponding to each display panel are arranged. 3. In the image display panel according to claim 1 or claim 2, the display content in the periphery of the image display portion of the plurality of display panels is the same content on adjacent display panels. display panel. 4. The image display panel according to any one of claims 1 to 3, wherein a plurality of the Fresnel convex lenses are arranged in front of the plurality of display panels. . 5. A Fresnel lens characterized by forming a plurality of optical axis centers on a transparent plate. 6. A Fresnel lens characterized by forming a convex prism on one surface of a transparent plate and a concave prism on the other surface. 7. The Fresnel lens according to claim 6, wherein a plurality of optical axis centers are formed in the transparent plate.