JP2001324764A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of attaining an enlarged image. SOLUTION: The display device 1000 includes a display panel 1102 with a prescribed effective display area PS, a light guide plate for display 1105, a 1st inverted optical system constituted of a 1st lens array 1103 where plural 1st lenses are arranged side by side corresponding to the display panel 1102, and a 2nd inverted optical system constituted of a 2nd lens array 1104 where plural 2nd lenses are arranged side by side corresponding to the 1st lenses, and the device is constituted of an enlarging optical system constituting plural channels for enlarging the displayed image on the display panel 1102 and forming the erect normal image on the plate 1105 through the 1st and 2nd corresponding lenses, and the image point on the display panel 1102 is image- formed on the plate 1105 through at least three or more channels.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a direct-view display device capable of obtaining a good display image over a large area.

[0002]

2. Description of the Related Art Flat display devices represented by liquid crystal display devices have come to be used in various fields by utilizing the features of light weight, thinness, and low power consumption. Among them, personal
Liquid crystal display devices are frequently used in portable information devices represented by computers.

However, in such a liquid crystal display device, an insulating substrate made of glass or the like is used. However, it is difficult to realize a large display area of 20 inches or more due to restrictions on the substrate and device. there were.

A technique for forming a large display area by bonding a plurality of liquid crystal panels is known from Japanese Patent Application Laid-Open No. 8-146455.

[0005] However, such a large display screen by bonding display panels has been required to be improved because the seams can be visually recognized.

Under such circumstances, for example, Japanese Patent Application Laid-Open No. 5-1883
A technique disclosed in Japanese Patent Publication No. 40 or Japanese Patent Application Laid-Open No. 10-253920 is known.

However, even when these techniques are used, there is still a problem that the curvature of the image surface increases as the magnification increases around the enlarged image, and good display cannot be obtained.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and has as its object to realize a small-sized and sufficiently enlarged image and a good display quality. A display device is provided.

[0009]

According to a first aspect of the present invention, there is provided a display apparatus comprising: a display panel having a predetermined effective display area; and a display panel having a predetermined effective display area. A display screen having an image display area larger than the area, and a first lens array arranged between the display panel and the display screen, and a plurality of first lenses corresponding to the display panel arranged side by side And a second inverted optical system including a second lens array in which a plurality of second lenses corresponding to the first lens are arranged side by side. A magnifying optical system that forms a plurality of channels for erecting a display image of the display panel on the display screen by the first and second lenses on the display screen. The light guide plate includes a light guide plate including a plurality of divided light guide paths, wherein the light guide plate has a curved surface corresponding to an imaging surface of the magnifying optical system, the back surface facing the magnifying optical system. And

A display device according to claim 11, wherein the display panel includes a predetermined effective display area, a display screen including an image display area larger than the effective display area of the display panel, and the display panel includes: A plurality of first screens arranged between the display screen and the display panel;
A first inverted optical system including a first lens array in which a plurality of lenses are juxtaposed and arranged on the main surface on the display panel side and a plurality of second lenses are juxtaposed and arranged on an opposing main surface; and the first lens A second lens array, in which a plurality of third lenses corresponding to the first lens array are arranged side by side on the main surface on the first lens array side, and a plurality of fourth lenses are arranged side by side on the opposing main surface. A magnifying optical system including an inverted optical system, the magnifying optical system constituting a plurality of channels for magnifying and erecting a display image of the display panel on the display screen by the corresponding first and second lenses, and the display Deflecting means for deflecting the optical axis of light emitted from the panel in accordance with the magnification of the magnifying optical system, wherein the first to fourth lenses are deflected by the deflecting means. Along the given optical axis The display screen is disposed, and the display screen includes a light guide plate including a plurality of divided light guide paths, and the light guide plate has a curved surface corresponding to an image forming surface of the magnifying optical system. Surface.

According to a twelfth aspect of the present invention, there is provided a display device, comprising: a display panel having a predetermined effective display area; a display screen having an image display area larger than the effective display area of the display panel; A plurality of first screens arranged between the display screen and the display panel;
A first inverted optical system composed of a first lens array in which a plurality of lenses are arranged side by side, and a second inverted optical system in which a plurality of second lenses corresponding to the first lens are arranged side by side A magnified imaging optical system constituting a plurality of channels for enlarging and erecting a display image of the display panel on the display screen by the corresponding first and second lenses; Deflecting means for deflecting the optical axis of the light beam according to the magnification of the magnifying optical system, wherein the first and second lenses are optical axes deflected by the deflecting means. And the display screen includes a light guide plate including a plurality of divided light guide paths, and the light guide plate has a rear surface facing the magnified image forming optical system of the magnified image forming optical system. With a curved surface corresponding to the image plane And wherein the Rukoto.

According to a thirteenth aspect of the present invention, there is provided a display device comprising: a display panel having a predetermined effective display area; a display screen having an image display area larger than the effective display area of the display panel; A plurality of first screens arranged between the display screen and the display panel;
A first inverted optical system composed of a first lens array in which a plurality of lenses are arranged side by side, and a second inverted optical system composed of a second lens array in which a plurality of second lenses corresponding to the first lens are arranged side by side Corresponding to each of the first
And a magnifying optical system which forms a plurality of channels for erecting and displaying an image displayed on the display panel on the display screen by a second lens. The positional relationship of the lenses is set such that any point on the display panel overlaps the display screen via the plurality of channels, and the display screen includes a plurality of light guide paths. The light guide plate includes a light guide plate, and a back surface facing the magnifying optical system is a curved surface corresponding to an image forming surface of the magnifying optical system.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the display device according to the present invention will be described below with reference to the drawings.

<First Embodiment> First, a liquid crystal display device according to a first embodiment of the display device of the present invention will be described in detail.

As shown in FIG. 1, the liquid crystal display device 1 is arranged on a liquid crystal panel 101, a drive circuit board (not shown) for supplying a drive signal to the liquid crystal panel 101, and a back surface of the liquid crystal panel 101. A surface light source unit 301 and an optical path deflecting unit 401 disposed on the front surface of the liquid crystal panel 101
515, a lens array group 501 including first to fifth lens arrays 511,.
It comprises a display light guide plate 801 arranged on the front surface of the magnifying lens 601 and a diffusion plate 701 arranged on the front surface of the display light guide plate 801. The display light guide plate 801 and the diffusion plate 701 constitute a display screen.

First, the liquid crystal panel 101 includes an effective display area PS having a diagonal size of 12 inches and (1024 × 3) × 768 display pixels. This liquid crystal panel 101
As shown in FIG. 2, an array including a thin film transistor (TFT) 121 in which a polycrystalline silicon (p-Si) thin film is used as an active layer as a switch element for controlling each pixel in order to realize the above high definition. It includes a substrate 111, a counter substrate 151, and a TN liquid crystal layer 191 held between the array substrate 111 and the counter substrate 151 via alignment films 183a and 183b, respectively. Deflectors 185a and 185b are arranged on the outer surfaces of the substrates 111 and 151 so that the transmission axes are orthogonal to each other.

If a color display is to be realized, a color filter is provided on the array substrate 111 or the counter substrate 15.
1 and can be displayed by driving each field period divided into each color period. In this case, a color filter 181 is formed on the array substrate 111.

More specifically, the array substrate 11
1 is a 0.7 mm thick transparent insulating substrate 11 made of glass.
102, arranged in a matrix (not shown)
4 × 3 signal lines and 768 scanning lines, and T as a switching element arranged near the intersection of the signal lines and the scanning lines
It comprises an FT 121 and a pixel electrode 131 connected to the TFT 121 and made of ITO.

The TFT 121 has a channel region 123
c, a polycrystalline silicon (p-Si) film 123 having source and drain regions 123d and 123s disposed with the channel region 123c interposed therebetween, and a p-Si film 1
A gate electrode 118 disposed on the 23 channel region 123c via a gate insulating film 125 and electrically connected to a scanning line; and source and drain regions 123s and 123d.
And drain electrodes 127 respectively connected to
s, 127d. This gate electrode 11
8 is connected to the scanning line. Drain electrode 127d
Are connected to a signal line. Further, the source electrode 12
7s is connected to the pixel electrode 131.

The pixel electrode 131 is formed on the color filter layer 18 serving also as an interlayer insulating film disposed on the TFT 121.
1 above.

The opposite substrate 151 is made of glass
A counter electrode 155 made of ITO facing the pixel electrode 131 is provided on a transparent insulating substrate 153 having a thickness of mm.

The liquid crystal panel 10 thus constructed
As shown in FIG. 1, the surface light source unit 301 disposed on the back side of the light guide plate 1 has a thin light guide plate 311 made of acrylic resin, and both longitudinal end faces of the light guide plate 311. And cold cathode tubes 321 arranged in two stages. Further, on the surface of the light guide plate 311, for example, two layers of prism sheets 331 made by 3M are arranged to make the diffused light from the light guide plate 311 relatively uniform parallel light. A milky white dot pattern is formed on the rear surface of the light guide plate 311 so as to selectively emit light propagating in the light guide plate 311 from the main surface, though not shown.

Next, an optical system disposed on the front surface of the liquid crystal panel 101 will be described with reference to FIGS.

Each of the first to fifth lens arrays 511,..., 515 constituting the lens array group 501 disposed on the front surface of the liquid crystal panel 101 has a respective lens 511a,.
“a” corresponds to each area of the effective display area PS of the liquid crystal panel 101 divided into, for example, 24 × 18 areas. In this embodiment, the effective display area PS of the liquid crystal panel 101 is divided into 24 × 18 areas. However, the effective display area PS may be divided into areas for each display pixel or each display picture element.
The number of divisions can be determined by the magnification, the distance between the liquid crystal panel 101 and the display light guide plate 801, and the number of divisions is desirably set to 9 or more in consideration of display quality and the like.

First, each lens 511a of the first lens array 511 of the lens array group 501 guides light from each area to the center of each lens of the second lens array 512.

Between the first lens array 511 and the second lens array 512, for example, a concave lens is disposed as the optical path deflecting means 401, whereby the light of the light transmitted through each lens 511a of the first lens array 511 is formed. The axis is the second
It is deflected to each corresponding lens 512a of the lens array 512. As the optical path deflecting means 401, a convex lens, a Fresnel lens, a prism, an optical fiber bundle, or the like is appropriately used in addition to the concave lens.

Each lens 512a of the second lens array 512 is an imaging lens that forms an inverted image at the position of the third lens array 513. Further, each corresponding lens 513a of the third lens array 513 condenses the corresponding lens 514a of the fourth lens array 514, and each corresponding lens 514a of the fourth lens array 514 transmits this light to the display guide. This is an imaging lens that forms an inverted image on the light plate 801. As a result, an image on the liquid crystal panel 101 is erected and enlarged on the light guide plate 801 for display.

Each lens 515a of the fifth lens array 515 projects on the display light guide plate 801 while suppressing the spread of the light flux of each light transmitted through the fourth lens array 514.

In this embodiment, the above-mentioned lens array group 501 is configured to form an erect image of approximately 1.2 times magnification on the display light guide plate 801 by the optical design and the setting of the distance between the lens arrays. Have been. Further, in this embodiment, the magnifying lens 601 is disposed between the fourth to fifth lens arrays 514 and 515 of the lens array group 501 described above.
A concave lens is arranged as the light guide plate 8 for display.
A magnified erect image of approximately 1.7 times is formed on 01.
As the magnifying lens 601, a convex lens, a Fresnel lens, a prism, or the like is appropriately used in addition to the concave lens.

Then, the display light guide plate 801 has a diagonal of 20 degrees.
It is formed by, for example, an optical fiber bundle having an image display area DS of inches. As the optical fiber bundle, for example, a fiber manufactured by Hamamatsu Photonics Co., Ltd.
Optical plates (FOP) are known. The display light guide plate 801 is formed by grasping an optical fiber and cutting the optical fiber into a plate shape in a sectional direction thereof. The display light guide plate 801 has a flat front surface facing the diffusion plate 701 and a curved rear surface facing the fifth lens array 515 in conformity with the image plane of the fifth lens array 515. Thereby, the light guide plate 801 for display is used.
Can be guided to a flat diffuser plate,
This makes it possible to display a sharp enlarged image.

Also, in this embodiment, the FOP display light guide plate 801 having the above-described structure is arranged, so that the fifth lens array 515 of the lens array group 501 and the display light guide plate 801 are located between the fifth lens array 515 and the display light guide plate 801. Fifth lens array 515
The respective optical axes of the light passing through the respective lenses are indicated by light guide plates 801 for display.
Without providing a collimator lens 801 as an optical path deflecting means for making the normal direction substantially coincide with the normal direction, the uniformity of the screen luminance is ensured and a good display quality is realized.

The diffusion plate 701 is arranged in front of the light guide plate 801 for display, and is formed in a flat plate shape having an appropriate diffusion ability in order to secure a good viewing angle.

As described above, according to the liquid crystal display device 1 of this embodiment, the display image displayed in the effective display area PS of the liquid crystal panel 101 having a diagonal size of 12 inches is displayed by one.
It was possible to enlarge and project an image display area DS having a diagonal size of 20 inches at an interval of 00 mm.

In addition, the liquid crystal display device 1 of this embodiment
According to the first embodiment, the effective display area PS of the liquid crystal panel 101 is divided into a plurality of areas, and the first to fifth areas are divided for each of the divided areas.
Each lens 511a of the lens array 511,.
, 515a correspond to each other and an image is guided, so that a sufficient enlarged image can be obtained with an undesired crosstalk with a short optical path length.

As a result, a liquid crystal panel 101 having a relatively small effective display area PS can be used, so that the cost of the device can be reduced.

In the above-described embodiment, the first lens array 511 can be omitted from its structure, but it works effectively to reduce display unevenness. Then, for example, as shown in FIG.
1 can be configured integrally with the optical path polarizing means 401. As a result, the number of lenses can be reduced, optical alignment can be reduced, and the cost of the apparatus can be further reduced.

As shown in FIG. 5, a light shielding mask 512b is provided between each lens 512a of the second lens array 512.
, Further reduction in crosstalk is achieved. The light shielding mask 512b can be arranged between the lenses of another lens array.

Further, each lens array 511,.
By arranging the louver 516 for separating the light flux between the lenses 515, a further reduction in the loss of talk is achieved.

In this embodiment, a lens array group 5 composed of first to fifth lens arrays 511,.
Although 01 is used as the erecting magnifying optical system, an inverted magnifying optical system may be formed by changing the configuration of the lens array group 501 by using an odd number of stages of image forming lenses.

Further, as the erecting magnifying optical system, for example, one in which the magnification of the first inverted image is a small absolute value, that is, a reduced image, and the magnification of the next inverted image is a large absolute value, That is, by forming an enlarged image, it is possible to use a lens having a small lens diameter, which can contribute to a reduction in the cost of the apparatus.

In the structure of the above-described embodiment, it is also effective to dispose an optical stop 517 between the lens arrays as shown in FIG. Thereby, undesired light that enters the adjacent lens is suppressed, and a good display image without crosstalk can be obtained. Also, this aperture 517
Is configured to be variably controllable in accordance with the ambient illuminance, thereby obtaining a good display image corresponding to the peripheral brightness. For example, when the surrounding environment is sufficiently bright, the display image can be viewed well by opening the aperture 517 relatively and increasing the light use efficiency.

Conversely, when the surrounding environment is dark, an image with high contrast can be displayed by relatively narrowing the aperture 517.

In the above-described embodiment, the optical path polarizing means 401 is arranged between the first lens array 511 and the second lens array 512. However, the optical path polarizing means is provided between the liquid crystal panel 101 and the first lens array 511. 401 can also be arranged. Also in this case, the liquid crystal panel 101 and the first lens array 511 can be integrally formed.

In the above-described embodiment, an enlarged image is formed by a combination of the lens array group 501 and the magnifying lens 601 constituting the magnifying optical system.
01 can be arranged on the light incident side in addition to being arranged on the light emitting side of the lens array group 501.

Further, in the above-described embodiment, the display screen is constituted by the diffusion plate and the light guide plate for display. Various applications such as fiber are available.

Next, in the liquid crystal display device 1 according to another embodiment of the present invention, the same portions are denoted by the same reference numerals, and
This will be described with reference to FIG.

The liquid crystal display device 1 has substantially the same configuration except that the magnifying lens 601 of the above-described embodiment has been removed, and the above-described optical path deflecting means 401 is the first lens array of the lens array group 501. 511 are integrally formed.

According to such a configuration, although the magnification is inferior to that of the above-described embodiment, the configuration of the optical system can be extremely simplified and the size of the apparatus can be reduced.

Also in this case, a stop, a light shielding mask, a louver and the like can be combined as in the above-described embodiment.

In each of the embodiments described above, a light transmission type liquid crystal panel has been described as an example. However, a reflection type display device may be used, and a self light emitting type display device such as an EL panel may be used. Can be.

In this embodiment, a single liquid crystal panel 1
Although 01 is used, it is needless to say that the display of a larger area can be performed by bonding and using these.

<Second Embodiment> Next, a second embodiment of the present invention will be described.
The display principle of the display device according to the embodiment will be briefly described with reference to the drawings.

In FIG. 8, reference numeral 1101 denotes a backlight device; 1102, a liquid crystal panel of a light transmission type;
First lens array constituting the inverted optical system of FIG. 1104
Denotes a second lens array constituting a second inverted optical system,
Reference numeral 105 denotes a display light guide plate. The first and second lens arrays 1103 and 1104 function as a magnifying optical system, and a plurality of channels are configured by a combination of these lenses.

The light transmitted through the liquid crystal panel 1102 is the first light.
Each lens of the lens array 1103 of the
6 and the second lens array 110
The erect and enlarged images are formed on the display light guide plate 1105 by the lenses 4. Here, the first and second lens arrays 1
The focal lengths of 103 and 1104 are adjusted so as to obtain desired magnifications.

As a result, the image point A on the liquid crystal panel 1102 is shifted to the focal point A ′ on the display light guide plate 1105 by the image point B.
Are imaged at the focal point B ′ on the display light guide plate 1105, respectively.

Incidentally, the first and second lens arrays 1
Each of the channels 103 and 1104 has a liquid crystal panel 1102.
, Respectively, and the images assigned to the adjacent channels are sufficiently overlapped.

More specifically, as shown in the figure, an image point C in the effective area of the liquid crystal panel 1102 is imaged at a focal point C ′ on the display light guide plate 1105 via a plurality of three or more channels. You. Therefore, for example, the region D is erectly magnified and imaged on the region D 'and the region E is erectly magnified on the region E', and by overlapping the respective regions, a consistent enlarged whole image is formed on the entire screen.

As described above, since the image points on the liquid crystal panel 1102 are formed and projected on the screen via a large number of channels, a sufficient display luminance is secured as a whole.

By the way, in order to prevent undesired crosstalk, that is, the effect of a channel having poor imaging characteristics, it is desirable that the parallelism of the emitted light in each part of the liquid crystal panel 1102 be high. That is, although it depends on the lens design,
It is desirable that the angle formed by the main light propagation direction determined by the half width of the luminance of the emitted light in each part of the liquid crystal panel 1102 be controlled to 30 °, more preferably 20 ° or less.

The lens pitch of the first lens array 1103 and the second lens pitch of the second lens array 1103 are adjusted so that the relative shift amount of the imaging position between adjacent channels matches the magnification of each channel.
It is desirable to set a ratio with respect to the lens pitch of the lens array, and this will be described with reference to FIG.

Here, the distance to the focal point of each lens of the first lens array 1103 is f ₁ , and the second lens array 1
The distance to the focal point of each lens 104 is _{f 2.} The lens pitch of the first lens array 1103 is p ₁ , and the lens pitch of the second lens array 1104 is p
_Let it be ₂ . Also, as shown, the liquid crystal panel 110
2, first lens array 1103, image plane 1106, second
The distances between the lens array 1104 and the display light guide plate 11105 are denoted by a ₁ , b ₁ , b ₂ , and a ₂ , respectively.

At this time, since the respective image planes have an image forming relationship, (1 / a ₁ ) + (1 / b ₁ ) = (1 / f ₂ ), (1 / a ₂ ) + (1/1) b ₂ ) = (1 / f ₂ ). The imaging magnification η is: η = (b ₁ / a ₁ ) (a ₂ / b ₂ ) = (a ₂ / b ₁ )
(A ₁ / b ₂ ).

The optical axis of each channel (in this case, a straight line passing through the centers of the two lenses of the lens arrays 1103 and 1104 constituting each channel) becomes the path of the light beam as it is. Therefore, the point where the light beam intersects the liquid crystal panel 1102 and the display light guide plate 1105 is a corresponding point.

Therefore, as shown in FIG.
Assuming that the interval between the corresponding points on the diffusion screen 1105 is q ₁ and the interval between the corresponding points on the diffusion screen 1105 is q ₂ , these values are: q ₁ = p ₁ − (p ₂ −p ₁ ) a ₁ / (b ₁₎ + B ₂ ) q ₂ = p ₂ + (p ₂ −p ₁ ) a ₂ / (b ₁ + b ₂ ).

Therefore, it is necessary that the imaging magnification is equal to the ratio of the intervals between the corresponding points (p ₂ / p ₁ ), and therefore it is required to satisfy the following condition.

(A ₂ b ₁ ) / (a ₁ b ₂ ) = ｛p ₂ +
(P ₂ −p ₁ ) a ₂ / (b ₁ + b ₂ )} / {p ₁ − (p
_2- p ₁ ) a ₁ / (b ₁ + b ₂ )} That is, the above equation is expressed as: (p ₂ / p ₁ ) = {1 + η (b ₁ / a ₂ )} / {1 + η
(B ₂ / a ₁ )}.

The magnification of the first inverted imaging optical system is given by η.
₁ (= −b ₁ / a ₁ ) and the magnification of the second inverted imaging optical system is η ₂ (= −a ₂ / b ₂ ), and (p ₂ / p ₁ ) = ｛1−η ₁ ｝ / {1− (1 / η ₂ )}.

That is, each lens of the first lens array 1103 constituting each channel and the second lens array 110
It is important to set the lens pitch with each lens of No. 4 so as to satisfy the above relationship. Thereby, it is possible to obtain an enlarged image of good display quality. (B
_{Since both 1} / a ₁ ) and (b ₂ / a ₂ ) are very small numbers as compared with 1, there is a slight difference in pitch.
It is desired to control this difference in pitch with high accuracy.

Further, a field lens or the like can be disposed between the first lens array 1103 and the second lens array 1104, or an imaging lens can be further disposed. It may be necessary to adjust the lens pitch according to the above.

Hereinafter, a display device according to a first specific example of this embodiment will be described in detail with reference to the drawings.

As shown in FIGS. 10 and 11, the liquid crystal display device 1000 includes a liquid crystal panel 1201, a drive circuit board (not shown) for supplying a drive signal to the liquid crystal panel 1201, and a liquid crystal panel 1201 on the back side of the liquid crystal panel 1201. A surface light source unit 1301 to be disposed, an optical path deflecting unit 1401 disposed on the front surface of the liquid crystal panel 1201, a lens array group 1501 including first and second lens arrays 1511 and 1512, a magnifying lens 1601, Lens 1
A light guide plate for display 1801 arranged on the front surface of the light guide plate 601 and a diffusion plate 1701 arranged on the front surface of the light guide plate for display 1801
And is provided.

Here, the first and second lens arrays 1
A plurality of channels are constituted by the respective lenses 511 and 1512.

The liquid crystal panel 1201 includes an effective display area PS having a display pixel of (1024 × 3) × 768 with a diagonal size of 12 inches, and has the above configuration (see FIG. 2).
The description is omitted because it is the same as.

As shown in FIGS. 10 and 11, the surface light source unit 1301 disposed on the back surface side of the liquid crystal panel 1201 is a thin light guide plate made of acrylic resin as shown in FIGS. 1311 and the light guide plate 131
Cold cathode tubes 1 arranged in two stages on both longitudinal end surfaces
321 are provided. Also, this light guide plate 131
On one surface, for example, two layers of prism sheets 1331 manufactured by 3M are arranged in order to make the diffused light from the light guide plate 1311 into relatively uniform parallel light. As a result, similarly to the above-described embodiment, the angle formed by the main light propagation direction determined by the half-width of the luminance of the emitted light at each part of the liquid crystal panel 1201 is controlled to about 25 °.

A milky white dot pattern (not shown) is formed on the rear surface of the light guide plate 1311 so as to selectively emit light propagating through the light guide plate 1311 from the main surface. In this specific example, in order to make the display luminance uniform, a dot pattern is formed in a peripheral area of the light guide plate 1311 so as to achieve relatively high luminance. This is because the peripheral region of the display light guide plate 1801 has a smaller number of working channels than the central region, and therefore, a decrease in luminance is inevitable, and the luminance distribution of the surface light source unit 1301 is offset so as to offset this. It is because it is adjusted.

Next, an optical system arranged on the front surface of the liquid crystal panel 1201 will be described.

The first and second lens arrays 1511 and 1512 constituting the lens array group 1501 arranged on the front surface of the liquid crystal panel 1201 respectively constitute an inverted image forming optical system, and each lens 1511a and 1512a 24 × 1 corresponding to the effective display area PS of the panel 1201
Eight channels are arranged to form 24 × 18 channels. The number of channels can be determined by the magnification, the distance between the liquid crystal panel 1201 and the display light guide plate 1801, and the like, and is preferably set to 9 or more in consideration of display quality and the like.

First, for example, a concave lens is disposed as a light path deflecting means 1401 on the front surface of the liquid crystal panel 1201.
Thereby, the optical axis of the light is deflected along the optical axis of each channel. That is, the effective display area P of the liquid crystal panel 1201
The optical axis of light emitted from around S is directed outward,
It is substantially coincident with the optical axis of the corresponding channel. Here, since the surface light source unit 1301 is configured so that the angle formed by the main light propagation direction determined by the half width of the luminance of the emitted light in each part of the liquid crystal panel 1201 is sufficiently small, the optical path deflecting means Due to 1401, the light beam is deflected in a predetermined direction. As a result, the light use efficiency is improved, and light entering a wide range of channels such that the imaging characteristics are degraded or stray light entering other channels is prevented.
As the optical path deflecting means 1401, a Fresnel lens, a prism, an optical fiber bundle, or the like is appropriately used in addition to the concave lens.

Each lens 1 of the first lens array 1511
511a is a liquid crystal panel 1201 side focal length _{a 1} of 6
0 mm, a focal length _{b 1} to the display light guide plate 1801 side 4m
m, lens diameter D ₁ is 2 mm, lens pitch p ₁ is 2.1
mm.

Each lens 1512a of the second lens array 1512 has a focal length b ₂ on the liquid crystal panel 201 side.
But 4 mm, the focal length _{a 2} to display the light guide plate 1801 side 7
2 mm, the lens diameter _{D 2} is 2 mm, the lens pitch _{p 2} is 2.122Mm.

Each lens 1511a of the first lens array 1511 is an imaging lens that forms an inverted image on an image plane between the first lens array 1511 and each lens 1512a of the second lens array 1512. Each of the lenses 1512a corresponding to the second lens array 1512 is a lens for magnifying an inverted image formed on the image plane as an erect image on the display light guide plate 1801.

Here, the ratio of each lens pitch between the first lens array 1511 and the second lens array 1512 is (p ₂ / p ₁ ) = {1 + η (b ₂ / a ₂ )} /｝ 1 + η
(B ₂ / a ₂ )｝, and each lens 1
Reference numerals 511a and 1512a are arranged such that the lens centers coincide with each other at the center of the screen.

In this specific example, the above-mentioned lens array group 1501 is configured to form an erect image of approximately 1.2 times magnification on the display light guide plate 1801 by the optical design and the setting of the distance between the lens arrays. ing.

Further, in this specific example, a concave lens is disposed as a magnifying lens 1601 at the subsequent stage of the above-mentioned lens array group 1501, so that a 1.7 × magnified erect image is formed on the display light guide plate 1801. Is formed.

The display light guide plate 1801 has a diagonal of 20 degrees.
It is formed by an FOP having an image display area DS of inches. The display light guide plate 1801 is
01 is flattened, and the back surface facing the magnifying lens array 1601 is magnified.
Is formed in accordance with the image forming plane. Accordingly, it is possible to prevent the field of view of the image formed on the display light guide plate 1801, and to display a flat and sharp enlarged image.

The diffusion plate 1701 is a light guide plate 1801 for display.
And has an appropriate diffusing power in order to ensure a good viewing angle.

As described above, according to the liquid crystal display device 1000 of this specific example, the display image displayed in the effective display area PS of the liquid crystal panel 1201 having a diagonal size of 12 inches is displayed at a diagonal distance of 170 mm with a diagonal distance of 170 mm. Enlarged projection was possible on the inch-size image display area DS.

Moreover, the liquid crystal display device 100 of this specific example
0, the image point on the liquid crystal panel 1201 is enlarged and projected by a plurality of channels formed by the corresponding lenses 1511a and 1512a of the first and second lens arrays 1511 and 1512, so that good display luminance is obtained. Was able to secure.

Then, the first and second lens arrays 1
Since the lens pitches of 511 and 1512 maintain a relationship where the overlapping position accuracy of the image formed by each channel does not cause undesired discontinuity, deterioration of the displayed image is prevented. Further, since the light emitted from the liquid crystal panel 1201 is controlled to have a sufficient parallelism as described above by devising the configuration of the surface light source unit 1301, the image quality is degraded due to crosstalk from a channel having poor imaging characteristics. Has been fully resolved.

The light source light from the surface light source unit 1301 is:
Since the peripheral area of the liquid crystal panel 1201 is set higher than the central area so as to offset the light quantity shortage in the peripheral area of the display light guide plate 1801, the variation of the display brightness in the plane is sufficiently eliminated. I have.

By the way, in this specific example, the FOP display light guide plate 1801 having the above-described structure is arranged so that the optical axis of light incident on the display light guide plate 1801 is normal to the display light guide plate 1801. To roughly match the direction,
Without disposing an optical path deflecting means between the lens array group 1501 and the display light guide plate 1801, uniformity of screen luminance is ensured and good display quality is realized.

In the liquid crystal display device 1000 of this specific example, the first lens array 1511 and the optical path polarizing means 140
The first or second lens array 1512 and the magnifying lens 1601 can be integrally configured. As a result, the number of lenses can be reduced, optical alignment can be reduced, and the cost of the apparatus can be further reduced.

In this specific example, the lens array group 1
Magnifying lens 16 between light guide plate 501 and display light guide plate 1801
01, the liquid crystal panel 1201 and the magnifying lens 16
01 and a magnifying lens can be arranged between them, or they can be combined.

Next, a display device according to a second specific example of this embodiment will be described by assigning the same reference numerals to the same portions.

As shown in FIGS. 12 to 14, the liquid crystal display device 1000 includes a liquid crystal panel 1201, a drive circuit board (not shown) for supplying a drive signal to the liquid crystal panel 1201, and a liquid crystal panel A surface light source unit 1301 disposed; an optical path deflecting unit 1401 disposed between the liquid crystal panel 1201 and the surface light source unit 1301;
A lens array group 1501 including first and second lens arrays 1511 and 1512;
And a diffusion plate 1701.

Here, the first and second lens arrays 1
A plurality of channels are constituted by the respective lenses 511 and 1512.

First, the liquid crystal panel 1201 has a diagonal of 10.
It includes an effective display area PS having a size of 5 inches and having (1024 × 3) × 768 display pixels. This liquid crystal panel 20
Reference numeral 1 is substantially the same configuration except that the size is different from that of the above-described specific example, and is configured by holding a ferroelectric liquid crystal layer instead of the TN liquid crystal layer 191.

In this specific example, the liquid crystal panel 1201 is disposed downstream of the optical path deflecting means 1401 in order to prevent image deterioration after transmission through the liquid crystal panel 1201. Therefore, light incident on the liquid crystal panel 1201 has a significantly different incident angle between the center and the periphery. Therefore, in the liquid crystal panel 1201 using the TN liquid crystal layer 1191, the display state is different between the center and the periphery. However, in this specific example, the liquid crystal panel 12
No. 01 uses a ferroelectric liquid crystal layer, that is, display is performed by switching the liquid crystal molecules in the in-plane direction, so that the displayed image is hardly affected by the viewing angle. In addition to the use of the ferroelectric liquid crystal layer, various types can be used as long as display is performed by in-plane switching, and an antiferroelectric liquid crystal layer may be used. IPS (In-Plane-Switchin)
g) A liquid crystal panel using a mode can also be suitably used.

The liquid crystal panel 12 thus configured
In order to secure a sufficient amount of light, a surface light source unit 1301 disposed on the back surface side of the light-emitting device 01 has a thin light guide plate 1311 made of an acrylic resin, as shown in FIGS.
The light guide plate 1311 is provided with cold cathode tubes 1321 arranged in two stages on both longitudinal end surfaces. Also,
On the surface of the light guide plate 1311, for example, a light-condensing sheet 1332 manufactured by Allied Signal Inc. is arranged in order to make the diffused light from the light guide plate 1311 into relatively uniform parallel light. Although not shown, the light-condensing sheet 1332 is
A light control unit disposed in an inverted quadrangular pyramid shape on 311 and a collimator lens unit disposed thereon are integrally laminated.

As a result, the angle formed by the main light propagation direction determined by the half width of the luminance of the emitted light at each part of the liquid crystal panel 1201 is controlled to about 10 °.

On the back side of the light guide plate 1311, a milky white dot pattern is formed by printing (not shown) so that light propagating through the light guide plate 1311 is selectively emitted from the main surface, as in the above-described specific example. Have been. Note that, also in this specific example, in order to make display luminance uniform, a dot pattern is formed in a peripheral region of the light guide plate 1311 so as to achieve relatively high luminance. This is because the peripheral region of the display light guide plate 1801 has a smaller number of working channels than the central region, and therefore, a decrease in luminance is inevitable, and the luminance distribution of the surface light source unit 1301 is offset so as to offset this. It is because it is adjusted.

Next, the optical system of the display device of this specific example will be described.

The first and second lens arrays 1511 and 1512 constituting the lens array group 1501 arranged on the front surface of the liquid crystal panel 1201 each constitute an inverted image forming optical system as in the above-described specific example. It is. Then, each lens 1511a, 1511b, 1512a,
Reference numeral 1512b denotes an effective display area PS of the liquid crystal panel 1201.
48 × 36 channels are arranged corresponding to. The number of channels can be determined by the magnification, the distance between the liquid crystal panel 1201 and the display light guide plate 1801, and the like, and it is preferable to set the number to 9 or more in consideration of display quality and the like.

First, the surface light source unit 1301 and the liquid crystal panel 12
For example, a concave lens is disposed as an optical path deflecting unit 1401 between the optical path 01 and the optical path deflecting unit 1401, whereby the optical axis of light is deflected along the optical axis of each channel. That is, the liquid crystal panel 1201
The optical axis of the light traveling toward the periphery of the effective display area PS is directed outward and substantially coincides with the optical axis of the corresponding channel.

As a result, the light use efficiency is improved, and the light is prevented from entering a wide range of channels such that the imaging characteristics deteriorate. As the optical path deflecting means 1401, a Fresnel lens, a prism, an optical fiber bundle, or the like is appropriately used in addition to the concave lens.

The first lens array 1511 includes a second lens array 1511 facing the first lens 1511 a on the liquid crystal panel 1201 side.
And a lens thickness t ₁ : 2 mm. Specifically, the first lens 1511a of the first lens array 1511, a focal length _{a 1} is 55mm on the liquid crystal panel 1201 side, (corresponding to the lens thickness) focal length _{b 1} is 2mm in the display light guide plate 1801 side, a lens diameter _{D 1} is 1.0 mm, the lens pitch _{p 1} is configured to 1.1 mm. Second lens 1 of first lens array 1511
Reference numeral 511b has optical characteristics similar to those of the lenses 1511a, and is arranged at the focal position of each lens 1511a. The lens diameter D ₁ ′ is 1.0 mm, and the lens pitch p _1.
'Is 1.06097561 mm. The lenses 1511a and 1511b have the same lens center at the center of the screen.
The viewing angle was ± 28 °.

The second lens array 1512 includes a second lens array 1512 facing the first lens 1512 a on the liquid crystal panel 1201 side.
And a lens thickness t ₂ : 2 mm. Specifically, the first lens 1512 a of the second lens array 1512 is connected to the first lens array 151.
It is configured with the same pitch as one first lens 1511b,
The tops of the lenses 1511b and 1512a are arranged in contact with each other. Each of the lenses 1512a of the second lens array 1512 has a focal length a2 of ₂ mm (corresponding to the lens thickness) on the liquid crystal panel 1201 side, and the display light guide plate 180
1 side focal length _{b 2} 80 mm, the lens diameter _{D 2} of 1.0
mm, lens pitch _{p 1} is 1.1112195122m
m. Then, each lens 1511a, 1
Reference numeral 511b denotes a lens whose center coincides with the center of the screen, and the viewing angles of the lenses 1511a and 1511b are set to ± 28 °.

Each lens 1511a of the first lens array 1511 has a lens 1511b and a lens 1512a.
Is an image forming lens for forming an inverted image on the image plane between the two.
Each of the lenses 1512a corresponding to the second lens array 1512 is a lens for magnifying an inverted image formed on the image plane as an erect image on the display light guide plate 1801.

Here, the ratio of each lens pitch between each lens 1511a of the first lens array 1511 and each lens 1512b of the second lens array 1512 is (p ₂ / p ₁ ) = ｛1 + η (b ₂ / a ₂ )｝ / ｛1 + η
(B ₂ / a ₂ )｝ It is set to satisfy.

The lens pitches of each lens 1511b of the first lens array 1511 and each lens 1512a of the second lens array 1512 that do not contribute to image formation are set equal in this embodiment because they are arranged in contact with each other. And the following relationships were satisfied.

P ′ ₁ / p ₁ = ｛η (a ₁ + t ₁ ) + (a
_{1 + t 1)} / {} ηa 1 + a 1 + 2t 1)} p 2 / p 2 '= {η (a 2 + 2t 2) + a 2} / {η
(A ₂ + t ₂ ) + (a ₂ + t ₂ )｝ In the above equation, a case where the refractive index of the lens material is 1 is shown in order to show a relational expression that does not depend on the refractive index of the lens material. However, an actual lens is made of a material having a refractive index of about 1.4 to 1.6. When the lens is made of a material having a refractive index larger than ₁ , the thicknesses t ₁ and t ₂ of the lens in the above formula indicate the apparent thickness. it is necessary that the lens array of _{n × t 1, n × t} 2 becomes thick with. Also,
Naturally, the overall length will be the corresponding length.

Therefore, taking into account the refractive index, a lens pitch suitable for the imaging magnification of each channel is set based on the above equation,
It is desirable to configure a magnified display device by setting the display images generated in each channel so as to overlap each other correctly on the display light guide plate.

In this specific example, the above-described lens array group 1501 is placed on the light guide plate for display 1801 in approximately 1..
It is configured to form an erect image at a magnification of 45 times.

Accordingly, the display light guide plate 1801 is
It is formed by an FOP having a 15-inch diagonal image display area DS. The display light guide plate 1801 has a flat front surface facing the diffusion plate 1701 and a flat rear surface facing the lens array group 1501.
It is formed to be curved in accordance with the imaging plane No. 01. Accordingly, it is possible to prevent the field of view of the image formed on the display light guide plate 1801, and to display a flat and sharp enlarged image.

The diffusion plate 1701 is a light guide plate 1801 for display.
And has an appropriate diffusing power in order to ensure a good viewing angle.

As described above, according to the liquid crystal display device 1000 of this specific example, a diagonal of 1 can be obtained with a small number of optical components.
The display image displayed on the effective display area PS of the liquid crystal panel 1201 having a size of 0.5 inches can be enlarged and projected at an interval of 150 mm onto an image display area DS having a size of 15 inches diagonally.

In addition, the liquid crystal display device 100 of this specific example
0, the image point on the liquid crystal panel 1201 is enlarged and projected by a plurality of channels formed by the corresponding lenses 1511a and 1512a of the first and second lens arrays 1511 and 1512, so that good display luminance is obtained. Was able to secure.

Moreover, the first and second lens arrays 1
Since the lens pitches of 511 and 1512 maintain a relationship where the overlapping position accuracy of the image formed by each channel does not cause undesired discontinuity, deterioration of the displayed image is prevented. Further, since the light emitted from the liquid crystal panel 1201 is controlled to have a sufficient parallelism as described above by devising the configuration of the surface light source unit 1301, the image quality is degraded due to crosstalk from a channel having poor imaging characteristics. Has been fully resolved.

The light source light from the surface light source unit 1301 is:
Since the peripheral area of the liquid crystal panel 1201 is set higher than the central area so as to offset the light quantity shortage in the peripheral area of the display light guide plate 1801, the variation of the display brightness in the plane is sufficiently eliminated. I have.

In the liquid crystal display device of this embodiment, a liquid crystal panel 12 in which a magnifying lens is arranged between the lens array group 1501 and the display light guide plate 1801 as in the first embodiment.
A magnifying lens may be disposed between the lens array 01 and the lens array group 1501, or a combination thereof may be used.

Further, in the display device of this specific example, the second lens 1511b of the first lens array 1511 is connected to the second lens 1511b.
Since the first lens 1512a of the lens array 1512 of this example was configured to be in contact with each other, the mutual lens pitch could be made equal. This facilitated the design and positioning of the optical system.

However, the second lens 1511b of the first lens array 1511 and the first lens 1512a of the second lens array 1512 can be arranged apart from each other. In this case, it is necessary to slightly vary the lens pitches according to the above.

The second lens array 1511
Lens 1511b or the second lens array 15
Although the lens diameter of the twelfth first lens 1512a can be set relatively large, since the lens thickness also increases,
It is necessary to set a large difference between the pitches of the lenses, which may make it difficult to secure processing accuracy and obtain uniform image quality over the entire screen. Therefore, the lens diameter depends on the refractive index of the material constituting the lens and the like.
About 2 mm is desirable.

Although the above specific examples have been described with reference to a light transmission type liquid crystal panel as an example, a reflection type display device may be used, and a self light emitting type display device such as an EL panel may be used. it can.

In this example, a single liquid crystal panel 120
1 is used, but it is needless to say that the display of a larger area can be performed by bonding and using them.

[0126]

As described above, according to the display device of the present invention, it is possible to realize a sufficiently enlarged image with a small size and to achieve good display quality. Thus, according to the present invention, it is possible to reduce the cost of a display device of, for example, a direct-view type having a large display area.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a liquid crystal panel of the liquid crystal display device shown in FIG.

FIG. 3 is a schematic configuration diagram of a lens array group of the liquid crystal display device shown in FIG.

FIG. 4 is a schematic configuration diagram of a liquid crystal display device according to a modification of the embodiment shown in FIG.

FIG. 5 is a schematic configuration diagram of a liquid crystal display device according to another modification of the embodiment shown in FIG.

FIG. 6 is a schematic configuration diagram of a liquid crystal display device according to another modification of the embodiment shown in FIG.

FIG. 7 is a schematic configuration diagram of a liquid crystal display device according to another embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating the operation of a liquid crystal display device according to another embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating the operation of a liquid crystal display device according to another embodiment of the present invention.

FIG. 10 is a schematic perspective view of a specific example of a liquid crystal display device according to another embodiment of the present invention.

FIG. 11 is a schematic configuration diagram of a liquid crystal display device according to a modification of the embodiment shown in FIG.

FIG. 12 is a schematic perspective view of a specific example of a liquid crystal display device according to another embodiment of the present invention.

FIG. 13 is a schematic configuration diagram of a liquid crystal display device according to a modification of the embodiment shown in FIG.

FIG. 14 is a partial schematic cross-sectional view of the liquid crystal display device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device 101 ... Liquid crystal panel 301 ... Surface light source part 401 ... Optical path deflecting means 501 ... Lens array group 601 ... Magnifying lens 701 ... Diffusion plate 801 ... Light guide plate for display

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H088 EA20 MA20 2H091 FA02Y FA08X FA08Z FA21Z FA23Z FA29X FA41Z GA13 LA30 MA07 5G435 AA00 AA18 BB12 BB15 CC09 CC12 DD02 DD07 EE27 EE33 FF02 FF03 GG12 GG24 GG12 GG24 GG12 GG12 GG12 GG01

Claims (13)

[Claims] A display panel having a predetermined effective display area; a display screen having an image display area larger than the effective display area of the display panel; and a display screen disposed between the display panel and the display screen. A first inverted optical system comprising a first lens array in which a plurality of first lenses corresponding to the display panel are arranged side by side, and a plurality of second lenses corresponding to the first lenses arranged side by side A second inverted optical system comprising an array of second lens arrays, and a corresponding display image of the display panel is enlarged and erected on the display screen by the corresponding first and second lenses. A magnifying optical system constituting a plurality of channels, wherein the display screen includes a light guide plate including a plurality of light guide paths, and the light guide plate includes the magnifying optical system. Display device characterized by opposing back surface is curved surface corresponding to the image plane of the magnifying optical system. 2. The display device according to claim 1, further comprising a diffusion plate disposed in front of the display screen. 3. The display according to claim 1, wherein the magnifying optical system forms an image point on the display panel on the display screen through at least three of the channels at various places. apparatus. 4. The lens pitch of said first lens is p ₁ ,
The magnification is η ₁ , the lens pitch of the _second lens is p ₂ ,
Assuming that the magnification is η ₂ , (p ₂ / p ₁ ) = {1 + η (b ₁ / a ₂ )} / η1 + η
_(B 2 _{/ a} 1)} The display device according to claim 1, characterized by satisfying the equation. 5. The display device according to claim 1, wherein light emitted from the display panel has directivity toward the first lens array. 6. The display device according to claim 1, wherein the display panel is of a light transmission type, and a light source device is disposed on a side of the display panel facing the display screen. 7. The display device according to claim 6, wherein the light source device includes a diffuse light source unit and a parallelizing unit that parallelizes light from the diffuse light source unit. 8. An optical path deflecting means disposed between the display panel and the magnifying optical system and deflecting an optical axis of light from the display panel along an optical axis of each of the channels. The display device according to claim 1. 9. The display device according to claim 1, wherein a magnifying lens is arranged between the display panel and the magnifying optical system. 10. The display device according to claim 1, wherein the luminance of light emitted from the display panel is set higher at the periphery than at the center of the effective display area. 11. A display panel having a predetermined effective display area, a display screen having an image display area larger than the effective display area of the display panel, and being arranged between the display panel and the display screen. A first lens array comprising a first lens array in which a plurality of first lenses corresponding to the display panel are juxtaposed and arranged on the main surface on the display panel side and a plurality of second lenses are juxtaposed and arranged on the opposite main surface. One inverted optical system and a plurality of third lenses corresponding to the first lens are arranged side by side on the main surface on the first lens array side, and a plurality of fourth lenses are arranged on the opposite main surface.
A second inverted optical system composed of a second lens array in which lenses are arranged side by side, and the display image of the display panel is enlarged on the display screen by the corresponding first and second lenses. A display device comprising: an enlargement optical system forming a plurality of channels to be vertically focused; and deflection means for deflecting an optical axis of light emitted from the display panel in accordance with an enlargement ratio of the enlargement optical system. The first to fourth lenses are arranged along an optical axis deflected by the deflecting means, and the display screen includes a light guide plate including a plurality of light guide paths. The display device, wherein the light plate has a curved surface corresponding to an imaging surface of the magnifying optical system on a back surface facing the magnifying optical system. 12. A display panel having a predetermined effective display area, a display screen having an image display area larger than the effective display area of the display panel, and being disposed between the display panel and the display screen. A first inverted optical system comprising a first lens array in which a plurality of first lenses corresponding to the display panel are arranged side by side, and a plurality of second lenses corresponding to the first lenses arranged side by side And a second inverted optical system arranged in order to form a plurality of channels for erecting an image displayed on the display panel on the display screen by the corresponding first and second lenses. A display device comprising: an imaging optical system; and a deflecting unit that deflects an optical axis of light emitted from the display panel in accordance with a magnification of the magnifying optical system, wherein the first and second optical systems are provided. Len The display screen is arranged along an optical axis deflected by the deflecting unit, and the display screen includes a light guide plate including a plurality of divided light guide paths, and the light guide plate includes the enlarged image forming optical system. A display device, wherein a back surface opposite to the curved surface is a curved surface corresponding to an image forming surface of the enlarged image forming optical system. 13. A display panel having a predetermined effective display area, a display screen having an image display area larger than the effective display area of the display panel, and being disposed between the display panel and the display screen. A first inverted optical system comprising a first lens array in which a plurality of first lenses corresponding to the display panel are arranged side by side, and a plurality of second lenses corresponding to the first lenses arranged side by side A second inverted optical system comprising an array of second lens arrays, and a corresponding display image of the display panel is enlarged and erected on the display screen by the corresponding first and second lenses. A magnifying optical system forming a plurality of channels, wherein a positional relationship between the first and second lenses is such that an arbitrary point on the display panel is located on the display screen in front of the lens. The display screen is configured to overlap through a plurality of channels, and the display screen includes a light guide plate including a plurality of divided light guide paths, and the light guide plate has a rear surface facing the magnifying optical system, the rear surface of the magnifying optical system. A display device having a curved surface corresponding to an imaging surface of a system.