WO2020026500A1

WO2020026500A1 - Display device

Info

Publication number: WO2020026500A1
Application number: PCT/JP2019/009192
Authority: WO
Inventors: 足立　昌哉
Original assignee: 株式会社ジャパンディスプレイ
Priority date: 2018-07-30
Filing date: 2019-03-07
Publication date: 2020-02-06
Also published as: JP2020020850A

Abstract

A display device according to one embodiment of the present invention is equipped with: a display panel having a display area comprising a plurality of pixels in an array; and a transparent spherical body facing the display area. The display panel has a central portion which includes a position closest to the spherical body; and a peripheral portion positioned on the outside of the central portion. The images displayed in the peripheral portion are reduced in size in comparison to the image displayed in the central portion.

Description

Display device

The embodiment of the present invention relates to a display device.

(2) In order to realize a special user experience, a technique of projecting an image in a sphere has been proposed (for example, see Patent Documents 1 and 2). This type of display device can be used, for example, in amusement-related devices such as fortune-telling game machines.

従来 In a conventional display device using a sphere, various lenses are arranged between the display panel and the sphere. For this reason, it is necessary to secure a sufficient distance between the display panel and the sphere, which has led to an increase in the size of the device. On the other hand, the magnification (enlargement ratio or reduction ratio) of the image differs between the central part and the peripheral part of the sphere as viewed from the user. Therefore, when the image displayed on the display panel is not corrected by the lens, the image projected on the sphere becomes partially unnatural and enlarged or reduced.

JP-A-11-38353 JP 2010-224196 A

One object of the present disclosure is to reduce the size of a display device using a sphere or to improve the display quality of an image projected on a sphere in the display device.

表示 A display device according to an embodiment includes a display panel having a display area in which a plurality of pixels are arranged, and a transparent sphere facing the display area. The display panel has a central portion including a position closest to the sphere, and a peripheral portion located outside the central portion. The image displayed in the peripheral portion is reduced in size compared to the image displayed in the central portion.

The display device according to one embodiment includes a display panel having a display area in which a plurality of pixels are arranged, and a transparent sphere facing the display area. Further, the display panel is disposed closer to the sphere than a focal point of the sphere on a central axis passing through a position closest to the display panel on the surface of the sphere and a center of the sphere.

FIG. 1 is a schematic perspective view of the display device according to the first embodiment. FIG. 2 is a schematic sectional view of the display device taken along line II-II in FIG. FIG. 3 is a schematic plan view near the display panel. FIG. 4 is a schematic plan view showing another example applicable to the vicinity of the display panel. FIG. 5 is a schematic plan view showing still another example applicable to the vicinity of the display panel. FIG. 6 is a diagram for explaining the principle of image display by the display device. FIG. 7 is a graph showing the relationship between the radial position of the sphere and the focal length. FIG. 8 is a graph showing an enlargement ratio of an image corresponding to the focal length shown in FIG. FIG. 9 is a graph showing an example of the conversion magnification of an image. FIG. 10 is a block diagram illustrating an example of image correction. FIG. 11 is a schematic diagram schematically showing the relationship between the circular area and the correction data. FIG. 12 is a schematic plan view of two types of pixels having different sizes. FIG. 13 is a schematic perspective view of a display device according to the second embodiment.

Some embodiments will be described with reference to the drawings.
It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate changes while maintaining the gist of the invention. In addition, the drawings may be schematically illustrated as compared with actual embodiments in order to make the description clearer, but are merely examples, and do not limit the interpretation of the present invention. In the drawings, the same or similar elements that are continuously arranged may be omitted from reference numerals. In the specification and the drawings, components that perform the same or similar functions as those described in regard to a drawing thereinabove are marked with the same reference numerals, and a repeated detailed description may be omitted.

In each embodiment, a case where the display device has a liquid crystal display element is exemplified. However, each embodiment does not prevent application of the individual technical ideas disclosed in each embodiment to a display device having another type of display element. For example, as other types of display devices, a self-luminous display device having an organic electroluminescent display device or a light emitting diode (LED) display device, an electronic paper type display device having an electrophoretic device, a Micro Electro Mechanical Systems ( A display device to which MEMS is applied, a display device to which electrochromism is applied, and the like are given.

[First Embodiment]
FIG. 1 is a schematic perspective view of a display device 1 according to the first embodiment. As shown, a first direction X, a second direction Y, and a third direction Z are defined. These directions X, Y, and Z are orthogonal to each other in the present embodiment, but may intersect with each other at an angle other than 90 °.

The display device 1 includes a housing 2 and a sphere 3. The housing 2 includes a support member 4, a display panel 5, and a controller 6. In addition to these, the display device 1 may include a communication device that communicates with an external device, a power supply device that supplies power to each unit, an operation device such as a button and a touch panel, various sensors, and the like.

In the example of FIG. 1, the housing 2 has a rectangular parallelepiped shape having sides along the first direction X, the second direction Y, and the third direction Z. However, the shape of the housing 2 is not limited to this example. The support member 4 is disposed on the upper surface of the housing 2 and has an annular opening exposing at least a part of the display panel 5. The sphere 3 is supported by the support member 4 in the third direction Z. The display panel 5 faces the sphere 3 through the opening of the support member 4.

The sphere 3 is transparent or translucent, and can be formed of, for example, quartz or glass. Further, the sphere 3 may be formed of a plastic such as acrylic or polycarbonate. The sphere 3 is not limited to a perfect sphere, and may be a spherical object, a hemispherical object, or an object having a curved surface. The user visually recognizes an image displayed on the display panel 5 through the sphere 3. The display device 1 having such a configuration can be applied to an amusement device such as a fortune-telling game. In addition, the display device 1 can be used in various modes.

FIG. 2 is a schematic sectional view of the display device 1 taken along line II-II in FIG. The support member 4 has a bottom 41, a side 42, and a protrusion 43. The bottom part 41 is, for example, in a disk shape parallel to the first direction X and the second direction Y. The side portion 42 is, for example, annular, and extends in the third direction Z from the periphery of the bottom portion 41. The bottom part 41 and the side parts 42 are arranged, for example, inside the housing 2.

The projecting portion 43 is, for example, annular, and extends in the third direction Z from the side portion 42. In the example of FIG. 2, the protrusion 43 protrudes from the housing 2. The protrusion 43 has a support surface 43a. The support surface 43a corresponds to the upper surface of the protrusion 43.

The sphere 3 is supported by the support surface 43a. The sphere 3 may be simply placed on the support surface 43a, or may be fixed to the support surface 43a by a method such as adhesion. In the example of FIG. 2, the support surface 43a is inclined inward. The support surface 43a may be a curved surface having a curvature corresponding to the surface of the sphere 3.

The display panel 5 is disposed inside the side part 42 between the sphere 3 and the bottom part 41. The display panel 5 in the present embodiment is a transmissive liquid crystal panel. Therefore, the backlight 7 is arranged between the display panel 5 and the bottom 41. The display panel 5 displays an image by selectively transmitting the light of the backlight 7. The backlight 7 is, for example, a side edge type, and includes a light guide facing the display panel 5 and a light source facing a side surface of the light guide. The backlight 7 may be a direct type in which a light source is arranged so as to face the lower surface of the display panel 5. The display panel 5 is not limited to the transmissive type, but may be a reflective type. When the display panel 5 is a reflection type, it is not necessary to provide the backlight 7. When the display panel 5 is a reflection type, a front light may be provided between the sphere 3 and the display panel 5.

遮光 In the example of FIG. 2, the light blocking member 8 is arranged between the sphere 3 and the display panel 5. The light blocking member 8 covers the periphery of the display panel 5. The display panel 5, the backlight 7, and the light blocking member 8 overlap the protruding portion 43 in the third direction Z, but are not limited to this example.

The sphere 3 and the display panel 5 face each other with a gap inside the support surface 43a. That is, the display panel 5 is located immediately below the sphere 3. In the example of FIG. 2, no optical system including a lens is arranged between the sphere 3 and the display panel 5.

The sphere 3 is located between the support surface 43 a and the display panel 5 and has a portion facing the opening of the support member 4. The portion is a curved surface that is convex on the display panel 5 side. As described above, when the sphere 3 is another object that is not a perfect sphere, the object may have a portion located between the support surface 43a and the display panel 5. Further, the portion may be a curved surface that is convex on the display panel 5 side.

Hereinafter, the diameter of the sphere 3 is called D1, and the center of the sphere 3 is called C1. A straight line passing through the position closest to the display panel 5 on the surface of the sphere 3 and the center C1 is called a center axis CL. Further, a position intersecting with the center axis CL on the upper surface of the display panel 5 is referred to as a center C2. The central axis CL is, for example, parallel to the third direction Z. The center C2 is a position closest to the sphere 3 on the display panel 5.

FIG. 3 is a schematic plan view near the display panel 5. The light blocking member 8 has a circular opening 8a. The opening 8a, the support surface 43a, the protruding portion 43, and the side portion 42 are all concentric around the central axis CL. The diameter of the inner peripheral edge of the support surface 43a is D2 smaller than the diameter D1 of the sphere 3 (D2 <D1). The diameter of the opening 8a is D3 smaller than the diameter D2 (D3 <D2).

The display panel 5 is, for example, rectangular as shown, but may be other shapes. The display panel 5 has a display area DA in which a plurality of pixels are arranged. The display area DA is, for example, a rectangular shape having four sides that are larger than the opening 8a and that extend along the outer shape of the display panel 5.

The display area DA has a circular area CA and a peripheral area PA around the circular area CA. The circular area CA is an area in which various images such as character strings and figures to be visually recognized by the user are displayed, and corresponds to an area inside the opening 8a. The peripheral area PA is an area facing the light shielding member 8.

FIG. 4 is a schematic plan view showing another example applicable to the vicinity of the display panel 5. In the example of this figure, the light shielding member 8 is not provided. In the peripheral area PA, an image with lower luminance than the circular area CA, for example, an entirely black image is displayed. For example, when the display panel 5 is a normally black mode liquid crystal panel, all pixels in the peripheral area PA may be turned off when displaying an image in the circular area CA.

FIG. 5 is a schematic plan view showing still another example applicable to the vicinity of the display panel 5. In the example of this figure, the light shielding member 8 is not provided similarly to FIG. Further, the display area DA has a circular shape centered on the central axis CL. In this case, the entire display area DA corresponds to a circular area CA in which various images to be visually recognized by the user are displayed. In the example of FIG. 5, the outer shape of the display panel 5 is also circular. However, the outer shape of the display panel 5 may be another shape such as a rectangle.

In the examples shown in FIGS. 3 to 5 described above, each of the circular areas CA is a perfect circle. However, the circular area CA does not necessarily have to be a perfect circle, and may have another shape such as an ellipse.

FIG. 6 is a diagram for explaining the principle of image display by the display device 1. Light from the display panel 5 enters the sphere 3, propagates to the opposite side of the sphere 3, and exits from the sphere 3. The light is refracted at the interface between the sphere 3 and air when the light enters the sphere 3 and further exits from the sphere 3.

In the present embodiment, the display panel 5 is disposed closer to the sphere 3 than the focal point F of the sphere 3 on the central axis CL. In this case, the user who looks into the sphere 3 in the direction along the central axis CL sees a virtual image in which the image displayed in the above-described circular area CA is larger than the actual image.

As an example, when the diameter D1 of the sphere 3 is 110 mm and the refractive index of the sphere 3 is 1.5, the focal length f on the central axis CL is about 82.5 mm. In this case, the display panel 5 may be arranged so that the distance between the centers C1 and C2 is less than 82.5 mm.

(4) If the display panel 5 comes into contact with or is very close to the sphere 3, unevenness may occur in the image of that part. Therefore, in the example of FIG. 6, a gap G is provided between the sphere 3 and the display panel 5. As an example, the gap G is preferably larger than the wavelength range of visible light.

In the present embodiment, it is preferable to use the high-definition display panel 5 so that the user can visually recognize the image enlarged by the sphere 3. As an example, if the definition of the display panel 5 is 800 ppi or more, an image with good display quality can be obtained even when the display panel 5 is enlarged.

焦点 The focal length f of the sphere 3 varies depending on the radial position R from the center axis CL. FIG. 7 is a graph showing the relationship between the radial position R [mm] and the focal length f [mm] of the sphere 3 having a diameter D1 of 110 mm and a refractive index of 1.5. As can be seen from the curve in the figure, the focal length f decreases as the radial position R increases. The gradient at which the focal length f decreases decreases as the radial position R increases.

から Since the focal length f varies depending on the radial position R, in other words, the sphere 3 has astigmatism, so that an image viewed through the sphere 3 has an aberration (distortion of the image). Therefore, the peripheral portion of the image is gradually enlarged. FIG. 8 is a graph showing an enlargement ratio of an image corresponding to the focal length f shown in FIG. This enlargement ratio is a relative value with 1 when the radial position R is 0. As can be seen from the curve in the figure, the enlargement ratio increases as the radial position R increases. The gradient at which the enlargement ratio increases increases as the radial position R increases. Since the image is enlarged at such an enlargement ratio, an unnatural image in which the peripheral portion is extended with respect to the central portion is visually recognized by the user.

The image as described above becomes a natural image in which the expansion of the peripheral portion is suppressed by correcting the image with the conversion magnification (reduction ratio) for canceling the enlargement ratio shown in FIG. FIG. 9 is a graph showing an example of the conversion magnification. This graph corresponds to a magnification curve representing the conversion magnification with respect to the radial position R. In FIG. 9, the case where the value of the radial position R is 0 corresponds to the center position of the image displayed on the display panel 5, and the case where the value of the radial position R is larger than 0 is the case of the image displayed on the display panel 5. It corresponds to the peripheral part. The conversion ratio (reduction ratio) of the image at the center position is set to 1, that is, the image at the center position is not enlarged or reduced, and the peripheral portion of the image is reduced at the corresponding conversion ratio (reduction ratio) shown in FIG. Thus, the user can visually recognize an image with less distortion.

変換 The conversion magnification at each radial position R can be, for example, the reciprocal of the magnification shown in FIG. In this case, the magnification curve descends as the radial position R increases. Note that the conversion magnification at each radial position R does not necessarily need to match the reciprocal of the magnification. If it is a magnification curve in which the conversion magnification decreases as the radial position R increases, the effect of suppressing expansion at the peripheral portion of the image can be obtained.

FIGS. 7 to 9 illustrate the focal length f, the magnification, and the conversion magnification when the diameter D1 of the sphere 3 is 110 mm and the refractive index is 1.5. In the sphere 3 under other conditions, the change of the focal length f with respect to the radial position R is the same as that in FIG. That is, as the radial position R increases, the focal length f decreases. Also, in the sphere 3 under other conditions, the change of the enlargement ratio with respect to the radial position R is the same as in FIG. That is, as the radial position R increases, the enlargement ratio increases. Therefore, in the sphere 3 under other conditions, the image can be corrected to a natural shape by the magnification curve, as in the description of FIGS. 7 to 9.

As described above, in the display device 1 according to the present embodiment, it is necessary to arrange the display panel 5 at a position closer to the sphere 3 than the focal length f of the sphere 3. Therefore, there is an upper limit for the size and the refractive index of the sphere 3. That is, under the condition that the focal length f of the sphere 3 is shorter than the radius of the sphere 3, the display panel 5 cannot be arranged at a position closer to the sphere 3 than the focal length f, and the image display of the display device 1 does not function sufficiently. In other words, the focal length f of the sphere 3 needs to be larger than the radius of the sphere 3.

Hereinafter, a specific example of the image correction will be described.
FIG. 10 is a block diagram illustrating an example of image correction. In this example, the controller 6 of the display device 1 includes an image conversion module 60. The image conversion module 60 may be configured by various ICs, or may be realized by a processor executing a computer program.

The image conversion module 60 converts the first image data IMG1 before correction into the second image data IMG2 using the correction data 61. The first image data IMG1 may be stored in advance in, for example, a memory included in the display device 1, or may be received through communication with an external device. The controller 6 outputs the second image data IMG2 to the display driver 9. The display driver 9 causes the display panel 5 to display an image based on the second image data IMG2.

{For example, the first image data IMG1 represents a rectangular image, and the second image data IMG2 represents a circular image corresponding to the circular area CA. In this case, in order to obtain the second image data IMG2, it is necessary to perform correction to reduce the peripheral portion of the image represented by the first image data IMG1 two-dimensionally compared to the central portion. For example, the correction data 61 indicates a reduction ratio required for such correction. Further, when the display panel 5 is rectangular or when the display panel 5 has a display area DA larger than the circular area CA, the peripheral area PA may be made non-display or black display may be corrected. . This non-display correction is particularly suitable for a structure in which the light shielding member 8 is not provided.

FIG. 11 is a schematic diagram schematically showing the relationship between the above-described circular area CA and the correction data 61. In the example of this figure, the circular area CA has a first area A1 including the center C2, a second area A2 outside the first area A1, and a third area A3 outside the second area A2. I have. The first area A1 is a circle having a radius R1. The second region A2 has a shape obtained by removing the first region A1 from a circle having a radius R2 larger than the radius R1. The third region A3 has a shape obtained by removing the first region A1 and the second region A2 from a circle having a radius R3 larger than the radius R2.

In FIG. 11, two cases (a) and (b) are illustrated as the correction data 61. Both the curved line of the case (a) and the bent straight line of the case (b) indicate the conversion magnification for correcting the first image data IMG1.

In case (a), the conversion magnification continuously decreases from the center C2 to the radius R3. For example, the conversion magnification decreases continuously for each pixel or for each sub-pixel. This magnification curve is the same as the example shown in FIG. 9, for example. The image conversion module 60 gradually reduces the first image data IMG1 as the distance from the center C2 increases so that the second image data IMG2 reduced at the conversion magnification indicated by the magnification curve is obtained.

In case (b), the conversion magnification from the center C2 to the radius R1 is the first magnification V1, the conversion magnification from the radius R1 to the radius R2 is the second magnification V2, and the conversion magnification from the radius R2 to the radius R3. Is the third magnification V3. The second magnification V2 is smaller than the first magnification V1, and the third magnification V3 is smaller than the second magnification V2.

The image conversion module 60 reduces the portion corresponding to the first area A1 in the first image data IMG1 by the first magnification V1, reduces the part corresponding to the second area A2 by the second magnification V2, The second image data IMG2 is generated by reducing the portion corresponding to A3 by the third magnification V3. Note that the first magnification V1 may be 1. In this case, in the first image data IMG1, a portion corresponding to the first area A1 is not reduced.

分かる As can be seen from the example of FIG. 9, the gradient of the magnification curve that cancels out the enlargement of the image becomes steeper as the radial position R increases. Therefore, it is preferable that the difference (V2−V3) between the second magnification V2 and the third magnification V3 is larger than the difference (V1−V2) between the first magnification V1 and the second magnification V2. From the same viewpoint, the difference (R3-R2) between the radius R3 and the radius R2 is smaller than the difference (R2-R1) between the radius 2 and the radius R1, and the difference (R2-R1) is smaller than the radius R1. preferable.

In the case (b), the circular area CA is divided into three areas A1 to A3. However, the circular area CA is divided into two or four or more areas, and different conversion magnifications are applied to each area. May be set. In order to obtain a smoother image, it is desirable to make the area to be divided finer, that is, to increase the number of divisions. It is more desirable that the conversion magnification continuously changes for each pixel as in the case (a).

The second image data IMG2 generated by the correction as described above has a peripheral portion (for example, the second region A2 and the third region) outside the central portion (for example, the first region A1) including the center C2. A3) represents the reduced image. That is, in case (a), an image in which the magnification continuously decreases from the center C2 toward the periphery is displayed in the circular area CA. In case (b), an image of the first magnification V1 is displayed in the first area A1, an image of the second magnification V2 is displayed in the second area A2, and an image of the third magnification V3 is displayed in the third area A3. Is displayed. When these images are observed through the sphere 3, these images are enlarged greatly toward the periphery at the enlargement ratio shown in FIG. 8. Therefore, it is possible to show the user a natural image in which the influence of the aberration is suppressed.

Here, the display area DA includes a first display area (for example, the first area A1) included in the central part and a second display area (for example, the second area A2 or the third area A3) included in the peripheral part. It is assumed that the second display area is visually recognized as being enlarged n times (n> 1) than the actual display area when the second display area is visually recognized through the sphere 3. In this case, if an image reduced by a factor of 1 / n with respect to the image displayed in the first display area is displayed in the second display area, the magnification of the first display area and the second display area by the sphere 3 is increased. Can be negated.

The process of generating the second image data IMG2 based on the first image data IMG1 may be executed by an information processing device different from the display device 1. In this case, the second image data IMG2 generated by the information processing device may be stored in the memory of the display device 1 in advance, may be input to the display device 1 by wired or wireless communication, or may be portable. May be input to the display device 1 via the recording medium.

画像 Alternatively, for example, an image captured using a fisheye lens may be used as the second image data IMG2. Generally, an image photographed using a fisheye lens is circular, and the peripheral portion is reduced relative to the central portion. Therefore, the image captured using the fisheye lens has the same characteristics as the second image data IMG2 generated by the correction using the correction data 61 in the above case (a). If such an image is used as the second image data IMG2, the image correction processing can be omitted.

As yet another example, an image whose peripheral portion is reduced based on normal image data may be displayed by adjusting the size of pixels included in the circular area CA. FIG. 12 is a schematic plan view of two types of pixels having different sizes. The first pixel PX1 on the left side in the drawing includes a red sub-pixel SPR1, a green sub-pixel SPG1, and a blue sub-pixel SPB1. The second pixel PX2 on the right side in the drawing includes a red sub-pixel SPR2, a green sub-pixel SPG2, and a blue sub-pixel SPB2.

The sub-pixels included in the first pixel PX1 and the second pixel PX2 are not limited to red, green, and blue. The first pixel PX1 and the second pixel PX2 may include sub-pixels of another color such as white. In FIG. 12, the sub-pixels SPR1, SPG1, and SPB1 are arranged in the first direction X, but these sub-pixels may be arranged in another manner. The same applies to the sub-pixels SPR2, SPG2, and SPB2.

The sub-pixels SPR1, SPG1, and SPB1 of the first pixel PX1 have a width Wx1 in the first direction X and have a width Wy1 in the second direction Y. The sub-pixels SPR2, SPG2, and SPB2 of the second pixel PX2 have a width Wx2 in the first direction X and have a width Wy2 in the second direction Y. In the example of FIG. 12, the width Wx2 is smaller than the width Wx1, and the width Wy2 is smaller than the width Wy1. Therefore, the second pixel PX2 is smaller in size than the first pixel PX1.

{Circle around (1)} The first pixel PX1 is arranged at the center of the circular area CA (for example, the first area A1 in FIG. 11). The second pixel PX2 is arranged in a peripheral portion of the circular area CA (for example, the second area A2 or the third area A3 in FIG. 11). By reducing the size of the pixels in the peripheral portion in this way, an image in which the peripheral portion is reduced compared to the central portion can be displayed even when the above-described image correction is not performed.

{Circle around (2)} Although two types of pixels are shown in FIG. 12, three or more types of pixels having different sizes may be arranged in the circular area CA. It is preferable that the size (for example, the area) of these pixels and the radial position R have a correlation corresponding to a magnification curve as shown in FIG.

[Second embodiment]
FIG. 13 is a schematic perspective view of a display device 100 according to the second embodiment. The display device 100 illustrated in FIG. 13 is different from the display device 1 illustrated in FIG. 1 in the position where the display panel is arranged. About the structure which does not mention especially, the thing similar to 1st Embodiment can be applied.

The display device 100 includes a housing 102 and a sphere 103. The housing 102 includes a sphere support 104 that supports the sphere 103, a display panel 105, a controller 106, a base 107 on which the support 104 is arranged, and a panel support 108 on which the display panel 105 supports the arrangement. Have.

表示 In the display device 1 shown in FIG. 1, the display panel 5 is disposed directly below the sphere 3. On the other hand, as shown in FIG. 13, in the display device 100 according to the second embodiment, the display panel 105 is disposed at a position obliquely behind the sphere 103 when viewed from the user side. That is, the main surface (display surface) of the display panel 105 is inclined at a predetermined angle θ with respect to the horizontal direction (for example, the first direction X).

With the structure shown in FIG. 13, it is easy to position an image (virtual image) visually recognized by the user through the sphere 103 at the user's eyes. In other words, the image can be easily viewed in a normal posture without the user having an unnatural posture for viewing the image. Is preferably not less than 50 ° and not more than 60 °. More preferably, the angle θ is 55 °. That is, the angle between the normal direction of the main surface of the display panel 105 and the horizontal direction is preferably 30 ° to 40 °, and more preferably 35 °.

According to the display devices 1 and 100 according to the embodiments described above, the user can visually recognize an image through the spheres 3 and 103. This image is a virtual image that looks larger than the actual circular area CA, and looks as if it were projected in the spheres 3 and 103. Further, it is possible to obtain an image with high display quality in which a difference in the magnification ratio according to the radial position R of the spheres 3 and 103 is corrected. Further, since no optical system other than the above-described components such as the spheres 3 and 103 is required, the cost can be reduced.

In the first embodiment, the display panel 5 is located immediately below the sphere 3, and no optical system including a lens is disposed between the two. Therefore, the distance between the sphere 3 and the display panel 5 can be reduced, and as a result, the size of the display device 1 can be reduced. Similar effects can be obtained in the second embodiment.

In the first embodiment, it has been described that the image viewed through the sphere 3 is larger at the periphery than at the center. This is equivalent to the fact that the central part of the image is smaller than the peripheral part.

{Circle around (1)} In the first embodiment, it has been described that the image displayed in the circular area CA is smaller at the periphery than at the center. This is synonymous with that the central part of the image is larger than the peripheral part.

表示 All display devices that can be implemented by a person skilled in the art with appropriate design changes based on the display device described as an embodiment of the present invention are also included in the scope of the present invention, as long as the gist of the present invention is included.

において Within the scope of the concept of the present invention, those skilled in the art can conceive various modifications, and it is understood that these modifications also fall within the scope of the present invention. For example, with respect to each of the above-described embodiments, those skilled in the art may appropriately add, delete, or change the design of components, or may add, omit, or change the conditions of the process. As long as it has the gist, it is included in the scope of the present invention.

In addition, as for other functions and effects brought about by the modes described in the embodiments, those which are apparent from the description of the present specification or those which can be appropriately conceived by those skilled in the art are naturally interpreted as being brought about by the present invention. Is done.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2 ... Case, 3 ... Ball, 4 ... Support member, 5 ... Display panel, 6 ... Controller, 7 ... Backlight, 8 ... Light shielding member, 43a ... Support surface, 60 ... Image conversion module, 61 ... Correction data, DA: display area, CA: circular area, PA: peripheral area, C1: center of sphere, C2: center of circular area, CL: central axis, F: focal point.

Claims

A display panel having a display area in which a plurality of pixels are arranged;
A transparent sphere facing the display area,
With
The display panel has a central portion including a position closest to the sphere, and a peripheral portion located outside the central portion,
The image displayed in the peripheral portion is reduced compared to the image displayed in the central portion,
Display device.
The display panel displays an image in which the reduction rate continuously increases as the distance from the position closest to the sphere increases, in the display area,
The display device according to claim 1.
The second image data is generated by correcting the first image data so that an image based on the data used for displaying the peripheral portion is reduced more than an image based on the data used for displaying the central portion. Further comprising a controller,
The display panel displays an image based on the second image data in the display area,
The display device according to claim 1.
The display area has a first display area included in the central part, and a second display area included in the peripheral part,
The second display area is magnified n times and is visible through the sphere,
In the second display area, an image reduced by a factor of 1 / n with respect to the image displayed in the first display area is displayed.
The display device according to claim 1.
The display area has a first area including the position closest to the sphere, a second area outside the first area, and a third area outside the second area,
The display panel displays an image of a first magnification in the first area, displays an image of a second magnification smaller than the first magnification in the second area, and displays an image of a second magnification smaller than the first magnification in the third area. Displaying an image of the third magnification, which is also small,
The display device according to claim 1.
A difference between the second magnification and the third magnification is larger than a difference between the first magnification and the second magnification;
The display device according to claim 5.
The plurality of pixels include a first pixel arranged in the central part and a second pixel arranged in the peripheral part,
The size of the second pixel is smaller than the size of the first pixel;
The display device according to claim 1.
The display panel is disposed closer to the sphere than the focal point of the sphere,
The display device according to claim 1.
The focal point is located on a central axis passing through the position closest to the display panel and the center of the sphere on the surface of the sphere,
The display device according to claim 8.
The sphere and the display panel face each other with a gap therebetween,
The display device according to claim 1.
A support member having an opening exposing at least a part of the display panel and a support surface positioned outside the opening and supporting the sphere,
The display panel faces the sphere through the opening,
The display device according to claim 1.
Further comprising a light-blocking member disposed between the display panel and the sphere,
The light blocking member has an opening facing the position closest to the display panel on the surface of the sphere,
The display device according to claim 1.
The display area has a circular area including a position intersecting a central axis passing through the position closest to the display panel and the center of the sphere on the surface of the sphere, and a peripheral area around the circular area. ,
The display panel displays an image of lower luminance than the image displayed in the circular area in the peripheral area,
The display device according to claim 1.
The display area is a circle including a position that intersects a central axis passing through the position closest to the display panel and the center of the sphere on the surface of the sphere,
The display device according to claim 1.
The main surface of the display panel is disposed inclined with respect to the horizontal direction,
The display device according to claim 1.
A display panel having a display area in which a plurality of pixels are arranged;
A transparent spherical object facing the display area,
With
The object has a focal point;
The display panel is disposed closer to the object than the focal point of the object,
The display area has a central portion including a position closest to the object, and a peripheral portion located outside the central portion,
The image displayed in the peripheral portion is reduced compared to the image displayed in the central portion,
Display device.
The object has a curved surface that is convex on the side of the display panel.
The display device according to claim 16.
Further comprising a support member for supporting the object,
The support member has an opening, a protrusion, and a support surface,
The opening exposes at least a part of the display panel,
The projecting portion is located outside the opening, and projects from the display panel side to the object side,
The support surface is included in the protrusion and contacts the object,
The object is located between the support surface and the display panel, and has a portion facing the opening,
The display device according to claim 16.
The display area includes a first area including the position closest to the object, a second area outside the first area, and a third area outside the second area.
The display panel displays an image of a first magnification in the first area, displays an image of a second magnification smaller than the first magnification in the second area, and displays an image of a second magnification smaller than the first magnification in the third area. Displaying an image of the third magnification, which is also small,
The display device according to claim 16.
A difference between the second magnification and the third magnification is larger than a difference between the first magnification and the second magnification;
The display device according to claim 19.