Diffraction sheet, manufacturing method, and three-dimensional display device

Abstract

To realize diffraction patterns which are arranged with high accuracy even for the case of a large area.SOLUTION: A three-dimensional display device 51 comprises: a diffraction sheet 1 of diagonally 10 inches or more that has a diffraction layer that includes a first diffraction pattern arranged on a transparent substrate in a first arrangement pattern and a second diffraction pattern arranged in a second arrangement pattern; a liquid crystal device LC having a plurality of pixels; and a light source. The first and second diffraction patterns and the pixels overlap in the normal direction of the diffraction sheet, the misalignment amount of which being 1 / 10 or less of the pixel pitch.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] The present invention relates to a diffraction sheet and a method for manufacturing the same. A three-dimensional display device including this diffraction sheet will also be mentioned.

Background Art

[0002] Various techniques are known for controlling the direction of light using the diffraction phenomenon of light and displaying a three-dimensional image (stereoscopic image). Patent Document 1 describes that by overlapping a light-shielding means such as a liquid crystal panel and a diffraction pattern, a three-dimensional image that moves naturally without image jumping is displayed.

[0003] Patent Documents 2 and 3 describe a display body that displays a stereoscopic image with natural colors by arranging a plurality of diffraction elements such as diffraction gratings and holograms and combining a light source, a diffraction grating cell, and a color filter. In this way, by combining a diffraction pattern in which a plurality of diffraction elements are arranged and an arranged pattern such as a liquid crystal or a color filter while aligning them, the three-dimensional image can be moved or displayed in full color.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0005] There is a need to display a larger three-dimensional image using the above-described technology. However, since the diffraction pattern that diffracts visible light has a fine structure on the order of submicrons and is fabricated using an electron beam lithography apparatus, a laser lithography apparatus, or the like, the upper limit of the size that can be formed at one time is currently 10 inches or less (the diagonal of a rectangle).

[0006] As a method for creating a large-area diffraction pattern, Patent Document 4 describes a method of creating using a multi-sided master plate composed of a plurality of unit master plates.

[0007] In the multi-sided master plate, there is a limit to the accuracy when arranging a plurality of unit master plates in alignment, and a deviation of about several tens of μm to several hundreds of μm will inevitably occur. The same deviation cannot be avoided even when the transfer of the unit master plate is repeated a plurality of times while changing the position. If only displaying a three-dimensional image, this deviation can be tolerated. However, in order to move the three-dimensional image or perform full-color display, it is necessary to align the diffraction pattern with the array pattern of the color filter or liquid crystal pixels. From the viewpoint of achieving good display, it is necessary to keep the deviation within about 1 / 10 or less of the array pitch. However, due to the above-described situation, it is extremely difficult and almost impossible with only the method described in Patent Document 4.

[0008] In view of the above circumstances, an object of the present invention is to provide a diffraction sheet capable of realizing a diffraction pattern arranged with high precision even for a large area. Another object of the present invention is to provide a large-area three-dimensional display device capable of displaying a moving three-dimensional image or a color three-dimensional image.

Means for Solving the Problems

[0009] The first aspect of the present invention is On a transparent glass substrate a three-dimensional display device including a diffraction sheet having a diagonal of 10 inches or more, having a diffraction layer including a first diffraction pattern arranged in a first array pattern and a second diffraction pattern arranged in a second array pattern, a liquid crystal device having a plurality of pixels, and either a color filter having two or more types of color filters. The first diffraction pattern and the second diffraction pattern are single-layer resin layers formed of a photocurable resin and having surface irregularities. In this three-dimensional display device, in the normal direction of the diffraction sheet, the first diffraction pattern and the second diffraction pattern are arranged so as to overlap with the pixel or the color filter, and the deviation amount is 1 / 10 or less of the pitch of the pixel or the color filter.

[0010] The second aspect of the present invention is a method for manufacturing a diffraction sheet. This manufacturing method includes: Step A of forming a first uncured resin layer on a transparent substrate having a diagonal of 10 inches or more; Step B of bringing a first diffraction pattern formed in a rectangular range of a diagonal of 10 inches or more on one surface of a first master into contact with the first uncured resin layer; Step C of disposing a first mask having a plurality of first openings formed based on a first arrangement pattern on the first master and irradiating light to cure a portion of the first uncured resin layer that overlaps with the first openings; Step D of forming a second uncured resin layer on the side of the substrate where the first uncured resin layer is formed; Step E of bringing a second diffraction pattern, which is different from the first diffraction pattern and is formed in a rectangular range of a diagonal of 10 inches or more on one surface of a second master, into contact with the second uncured resin layer; and Step F of disposing a second mask having a plurality of second openings formed based on a second arrangement pattern different from the first arrangement pattern on the second master and irradiating light to cure a portion of the second uncured resin layer that overlaps with the second openings.

[0011] The third aspect of the present invention includes a transparent substrate, a first diffraction pattern arranged in a first arrangement pattern on the substrate, and a diffraction layer including a second diffraction pattern arranged in a second arrangement pattern different from the first diffraction pattern on the same side of the substrate as the first diffraction pattern, and the diffraction sheet in which the second diffraction pattern is thicker than the first diffraction pattern. The first diffraction pattern and the second diffraction pattern are a single-layer resin layer formed of a photocurable resin and having surface irregularities, and the planar shape is a rectangle with a diagonal of 10 inches or more.

Advantages of the Invention

[0012] According to the present invention, a diffraction pattern arranged with high precision can be realized even for a large area. This can contribute to the realization of a large-area three-dimensional display device that can display a moving three-dimensional image or a three-dimensional image in color.

Brief Description of the Drawings

[0013]

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Modes for Carrying Out the Invention

[0014] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 14. First, a method for manufacturing the diffraction sheet 1 according to the present embodiment will be described. As step A, as shown in FIG. 1, a photocurable resin is arranged in layers on a transparent substrate 10 to form an uncured resin layer (first uncured resin layer) 20. As the substrate 10, glass or various resins can be used. A typical example of the photocurable resin is an ultraviolet curable resin, but other materials can also be used.

[0015] As step B, as shown in FIG. 2, the first master 100 is brought close to the uncured resin layer 20, and the first diffraction pattern 100a formed on the first master 100 is brought into contact with the uncured resin layer 20. The first master 100 is a large-area transparent plate with a diagonal exceeding 10 inches, and can be manufactured using the technique described in Patent Document 4. For example, when unit original plates with a diagonal of 10 inches are arranged or transferred in a 3×3 two-dimensional matrix, a first master 100 with a diagonal of about 30 inches can be manufactured. The first diffraction pattern 100a is formed in a rectangular range with a diagonal of 10 inches or more on one surface of the first master 100, and has substantially the same dimensions as the diffraction sheet to be manufactured.

[0016] In the subsequent step C, as shown in FIG. 3, the first mask 110 is placed on the first master 100, and light for curing the uncured resin layer 20 is irradiated. The first mask 110 has a plurality of openings (first openings) 110a formed based on the first arrangement pattern. The first arrangement pattern is, for example, the arrangement of the red filter of an RGB color filter. The first mask is substantially the same as a mask for forming a color filter, and a large-area one can be manufactured relatively easily by a known method. By step C, only the portion of the uncured resin layer 20 that overlaps the opening 110a and is exposed within the opening 110a cures in a plan view. When the first master 100 and the first mask 110 are moved and the uncured resin layer that has not been cured is removed by washing or the like, as shown in FIG. 4, the first diffraction pattern 21 patterned in the first arrangement pattern is formed on the substrate 10. Note that the opening in this specification means a part through which light can pass. Therefore, it is not essential for the mask to have holes (spaces).

[0017] In the subsequent step D, a photocurable resin is disposed on the side of the substrate 10 where the first diffraction pattern 21 is formed, and an uncured resin layer (second uncured resin layer) 20A is formed as shown in FIG. 5. The photocurable resin constituting the uncured resin layer 20A may be the same as or different from that used in step A. The uncured resin layer 20A may cover part or all of the first diffraction pattern 21.

[0018] As a subsequent step E, as shown in FIG. 6, the second plate 200 is brought close to the uncured resin layer 20A, and the second diffraction pattern 200a formed on the second plate 200 is brought into contact with the uncured resin layer 20A. The second plate 200 is a transparent plate having the same size as the first plate 100. The second diffraction pattern 200a is a diffraction pattern different from the first diffraction pattern 100a, and is formed in a rectangular range of 10 inches or more in diagonal on one surface of the second plate 200.

[0019] In the subsequent step F, as shown in FIG. 7, the second mask 210 is disposed on the second plate 200, and light for curing the uncured resin layer 20A is irradiated. The second mask 210 has a plurality of openings (second openings) 210a formed based on a second arrangement pattern different from the first arrangement pattern. The second arrangement pattern is, for example, the arrangement of the green filter of an RGB color filter. By step F, only the portion of the uncured resin layer 20A that overlaps the opening 210a and is exposed within the opening 210a cures in a plan view. When the second plate 200 and the second mask 210 are moved and the uncured resin layer that has not been cured is removed by washing or the like, as shown in FIG. 8, a second diffraction pattern 22 patterned in the second arrangement pattern is formed on the substrate 10. At this time, the uncured resin that covered part or all of the first diffraction pattern 21 is also removed.

[0020] In subsequent step G, a photocurable resin is disposed on the side of the substrate 10 where the second diffraction pattern 22 is formed, and an uncured resin layer (third uncured resin layer) 20B is formed as shown in FIG. 9. The photocurable resin constituting the uncured resin layer 20B may be the same as any of those used in steps A and D, or may be different from both. The uncured resin layer 20B may cover part or all of the first diffraction pattern 21 and the second diffraction pattern 22.

[0021] As subsequent step H, as shown in FIG. 10, the third plate 300 is brought close to the uncured resin layer 20B, and the third diffraction pattern 300a formed on the third plate 300 is brought into contact with the uncured resin layer 20B. The third plate 300 is a transparent plate having the same size as the first plate 100 and the second plate 200. The third diffraction pattern 300a is a diffraction pattern different from both the first diffraction pattern 100a and the second diffraction pattern 200a, and is formed in a rectangular range of 10 inches or more in diagonal on one surface of the third plate 300.

[0022] In subsequent step I, as shown in FIG. 11, the third mask 310 is disposed on the third plate 300, and light for curing the uncured resin layer 20B is irradiated. The third mask 310 has a plurality of openings (third openings) 310a formed based on a third arrangement pattern different from both the first arrangement pattern and the second arrangement pattern. The third arrangement pattern is, for example, the arrangement of the blue filter of an RGB color filter. By step I, only the portion of the uncured resin layer 20B that overlaps the opening 310a and is exposed within the opening 310a cures in plan view. When the third plate 300 and the third mask 310 are moved and the uncured resin layer that has not been cured is removed by washing or the like, a third diffraction pattern 23 patterned in the third arrangement pattern is formed on the substrate 10 as shown in FIG. 12.

[0023] Through the above steps, the diffraction sheet 1 of the present embodiment is manufactured. As shown in FIG. 12, the diffraction sheet 1 includes a diffraction layer 30 including a first diffraction pattern 21, a second diffraction pattern 22, and a third diffraction pattern 23 on a substrate 10. The first diffraction pattern 21, the second diffraction pattern 22, and the third diffraction pattern 23 are accurately arranged based on the first arrangement pattern, the second arrangement pattern, and the third arrangement pattern, respectively, in a plan view of the diffraction sheet 1. Therefore, by attaching the diffraction sheet 1 to a color filter in which color filters of three colors are arranged based on the first arrangement pattern, the second arrangement pattern, and the third arrangement pattern, or a liquid crystal device having a liquid crystal layer and a driving substrate in which pixels having the same size as the openings 110a, 210a, and 310a are arranged, while aligning, in the normal direction of the diffraction sheet 1, each diffraction pattern 21, 22, 23 can be overlapped with the color filter or the pixel, and the deviation amount can be suppressed to 1 / 10 or less of the pitch of the color filter or the pixel.

[0024] According to the manufacturing method of the diffraction sheet according to the present embodiment, in each plate used in steps B, E, and H, an unpatterned overall diffraction pattern is used, and the uncured resin layer is cured while being patterned by light irradiation using the masks in steps C, F, and I. Thereby, even for a large area with a diagonal of 10 inches or more, a diffraction layer 30 including a plurality of diffraction patterns can be formed while achieving high patterning accuracy.

[0025] In the present embodiment, an example in which three sets of formation of the diffraction pattern using the plate and the mask are performed has been described, but this is merely an example. The number of times of forming the diffraction pattern can be a desired number of 2 or more. For example, by forming a plurality of patterns in which the reproduced three-dimensional images are slightly different, and attaching them to a liquid crystal device to configure a display device, it becomes possible to display a moving three-dimensional image.

[0026] The diffraction sheet 1A of the modified example shown in FIG. 13 includes a color filter 40 including a plurality of types of color filters between the substrate 10 and the diffraction layer 30. When manufacturing the diffraction sheet 1A, since the masks used when forming the color filters of each color of the color filter can be directly used as the first mask 110, the second mask 210, and the third mask 310, it is possible to simply manufacture while suppressing the deviation amount between each diffraction pattern and the corresponding color filter to 1 / 10 or less of the pitch of the color filter.

[0027] The diffraction sheet 1B of the modified example shown in FIG. 14 includes a diffraction layer 40A instead of the diffraction layer. The diffraction layer 40A has a first diffraction pattern 41 containing a red coloring material, a second diffraction pattern 42 containing a green coloring material, and a third diffraction pattern 43 containing a blue coloring material. That is, the diffraction layer 40A also functions as a color filter. The diffraction sheet 1B can be produced by the same procedure as described above by simply mixing a coloring material corresponding to the material of the uncured resin layer. The diffraction sheet 1B has the advantage that there is no deviation between the color filter and the diffraction pattern at all.

[0028] The second embodiment of the present invention will be described with reference to FIGS. 15 to 17. In the following description, for the configurations common to those already described, the same reference numerals are given and the overlapping descriptions are omitted.

[0029] FIG. 15 is a schematic diagram showing a diffraction sheet 2 according to the present embodiment. The diffraction sheet 2 includes a diffraction layer 30A instead of the diffraction layer 30. Among the three diffraction patterns constituting the diffraction layer 30A, the first diffraction pattern 21 is the same as that of the first embodiment. The second diffraction pattern 22A is the same as the second diffraction pattern 22 in terms of the pattern itself, but is formed thicker than the second diffraction pattern 22. The third diffraction pattern 23A is the same as the third diffraction pattern 23 in terms of the pattern itself, and is formed even thicker than the second diffraction pattern 22A.

[0030] The diffraction sheet 2 can be manufactured by substantially the same procedure as in the first embodiment. The points of change from the first embodiment are as follows. · In step E, the uncured resin layer 20A is formed thicker than the uncured resin layer 20. · In step F, the second plate 200 is stopped at a position higher than the first plate 100. · In step G, the uncured resin layer 20B is formed thicker than the uncured resin layer 20A. · In step H, the third plate 300 is stopped at a position higher than the second plate 200. When the types of diffraction patterns in the diffraction layer increase, similarly, the newly formed uncured resin layer may be formed thicker than the immediately preceding uncured resin layer.

[0031] The diffraction sheet and its manufacturing method according to this embodiment have the same effects as those of the first embodiment. Further, since the diffraction pattern formed later is formed thicker, it is difficult for the plate to come into contact with the already formed diffraction pattern. As a result, deformation, damage, etc. of the formed diffraction pattern can be preferably suppressed.

[0032] In this embodiment, the dimension of the step between the diffraction patterns can be set as appropriate, for example, it can be 100 nm or more and 10 μm or less. Note that if the step is too large, the leakage light that enters adjacent color filters or pixels and becomes stray light increases. Assuming that the average pitch of the diffraction pattern is d, the wavelength of light is λ, and the diffraction angle is θ, the following formula 1 holds. Sin(θ)=λ / d …(1) At this time, the width w of the leakage light in the plan view of the diffraction sheet 1 can be calculated by the following formula 2. By suppressing the value of w to 1 / 10 or less of the pitch of the color filter or pixel, the influence of the stray light can be reduced to an acceptable level. w=h×tan(θ) …(2)

[0033] From another perspective, the dimension of the step is preferably equal to or greater than the height of the diffraction pattern formed later, that is, the depth of the surface unevenness, and preferably 1.5 times or more the depth of the surface unevenness. By doing so, when the plate is brought into contact with the thicker uncured resin layer, it is difficult for the plate to come into contact with the already formed diffraction pattern, and the formed diffraction pattern is preferably retained.

[0034] A three-dimensional display device applying a diffraction sheet according to the present invention will be described. FIG. 16 is a schematic diagram of a three-dimensional display device 51 in which a diffraction sheet 1 is disposed on the incident side of a liquid crystal device LC. Since the light emitted from the diffraction layer 30 has an angle closer to perpendicular to the diffraction sheet 1 than the light incident on the diffraction sheet 1 from a light source (not shown), by appropriately aligning the diffraction pattern of the diffraction sheet 1 and the pixels of the liquid crystal device LC, light can be accurately guided to the liquid crystal device LC and the color filter attached to the LC of the liquid crystal device.

[0035] FIG. 17 is a schematic diagram of a three-dimensional display device 52 in which a diffraction sheet 1 is disposed on the emission side of a liquid crystal device LC. Since the light incident on the liquid crystal device LC becomes light with strong directivity by passing through the diffraction sheet 1, it is possible to display with high contrast and excellent color development. In either case of the three-dimensional display devices 51 and 52, it is preferable that the distance between the diffraction sheet and the liquid crystal device or the color filter is 500 μm or less because the deviation of the light beam generated between the two can be suppressed. The diffraction sheet and the liquid crystal device or the like may be disposed in close contact (i.e., at a distance of zero). In this case, from the viewpoint of sufficiently exerting the diffraction effect, a slight air layer or vacuum layer may exist between the diffraction pattern and the liquid crystal device. When the diffraction sheet and the liquid crystal device or the like are brought into close contact via an adhesive or a pressure-sensitive adhesive, it is necessary to make the refractive index of the resin of the diffraction pattern different from the refractive index of the adhesive or the pressure-sensitive adhesive.

[0036] As described above, each embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and configurations such as changes and combinations within the scope not departing from the gist of the present invention are also included. Some changes will be exemplified below, but these are not all, and other changes are also possible. These changes may be appropriately combined in two or more.

[0037] ·By appropriately setting the elastic modulus of the diffraction pattern, even when no step is provided between the diffraction patterns, it is possible to suppress damage to the formed diffraction pattern by the plate or occurrence of transfer defects due to pressure unevenness in the newly formed diffraction pattern. From such a perspective, it is preferable that the elastic modulus (hardness) of the formed (i.e., after curing) diffraction pattern is 0.5 MPa to 100 GPa at room temperature, and more preferably 2500 MPa to 13 GPa.

[0038] ·A release layer may be provided on the surface of the diffraction pattern of each plate used in the manufacturing method. By doing so, in steps C, F, I, etc., after the curing of the uncured resin layer, the plate can be easily peeled off, and the diffraction pattern can be preferably formed. Examples of the material of the release layer include those with good slipperiness such as silicone, fluorine-based resins, polymers having an alkyl group, and thermosetting resins that become brittle by heating. In the case of the latter, after the uncured resin layer is cured by light irradiation, the plate is heated to cure the release layer. Then, when the plate is moved, the brittle release layer peels off from the plate and remains on the diffraction pattern, so that the plate is easily peeled off from the diffraction pattern. Then, the peeled release layer is removed from the diffraction pattern by washing or the like. After manufacturing the diffraction sheet, a new release layer is arranged on the plate in preparation for the next manufacturing. The thickness of the release layer that is heated and peeled off from the plate can be, for example, 10 nm or more and 1 μm or less.

[0039] ·By arranging a transparent material having a refractive index different from that of the resin forming the diffraction pattern on the diffraction pattern, the surface of the diffraction layer may be flattened. By using an adhesive resin material as the transparent material, the diffraction layer can be directly bonded to a liquid crystal device, a color filter, or the like. The diffraction pattern can preferably diffract the incident light by being adjacent to a gas layer such as air or a vacuum layer.

[0040] · The uncured resin layer may be formed of a thermosetting resin. In this case, each diffraction pattern can be formed by heating only the region corresponding to the array pattern. In this case, since the plate does not have to be transparent, its durability can be improved by forming it of a metal such as nickel.

[0041] · In the diffraction sheet of the present invention, the plurality of diffraction patterns may be arranged without gaps, or may be arranged with a gap (gap) of a certain width. If the width of the gap is equal to or less than the width in plan view of the partition wall in the liquid crystal pixel or the black matrix formed on the color filter, the influence on the display quality can be minimized. In view of the general dimensions of the partition wall and the black matrix, the width of the gap is preferably about 1 μm to 100 μm, and more preferably about 5 μm to 40 μm.

Explanation of Signs

[0042] 1, 1A, 1B, 2 Diffraction sheet 10 Substrate 20 Uncured resin layer (first uncured resin layer) 20A Uncured resin layer (second uncured resin layer) 20B Uncured resin layer (third uncured resin layer) 21, 41 First diffraction pattern 22, 22A, 42 Second diffraction pattern 30, 40A Diffraction layer 40 Color filter 51, 52 Three-dimensional display device 100 First plate 100a First diffraction pattern 110 First mask 110a Aperture (first aperture) 200 Second plate 200a Second diffraction pattern 210 Second mask 210a Aperture (second aperture) LC Liquid crystal device

Claims

Claim 1: A diffractive sheet having a diffractive layer including a first diffractive pattern arranged in a first array pattern and a second diffractive pattern arranged in a second array pattern on a transparent glass substrate, the diffractive sheet having a diagonal size of 10 inches or more, either a liquid crystal device having a plurality of pixels and a color filter having two or more types of color filters, a light source, and comprising: wherein the first diffractive pattern and the second diffractive pattern are a single-layer resin layer formed of a photocurable resin and having surface irregularities, in the normal direction of the diffractive sheet, the first diffractive pattern and the second diffractive pattern are arranged overlapping the pixels or the color filter, and the deviation amount is 1 / 10 or less of the pitch of the pixels or the color filter, a three-dimensional display device. Claim 2 wherein the diffractive sheet is disposed between the light source and the liquid crystal device or the color filter, The three-dimensional display device according to claim 1. Claim 3 wherein the liquid crystal device or the color filter is disposed between the light source and the diffractive sheet, The three-dimensional display device according to claim 1. Claim 4 wherein the diffractive layer is bonded to the liquid crystal device or the color filter by a transparent adhesive material, The three-dimensional display device according to claim 1. Claim 5 wherein a gas layer or a vacuum layer is adjacent to the diffractive layer, The three-dimensional display device according to claim 1. Claim 6 Step A of forming a first uncured resin layer on a transparent substrate having a diagonal size of 10 inches or more; Step B of bringing a first diffractive pattern formed in a rectangular range of one side of a first master plate over a diagonal size of 10 inches or more into contact with the first uncured resin layer; Step C of disposing a first mask having a plurality of first openings formed based on the first array pattern on the first master plate and irradiating light to cure a portion of the first uncured resin layer overlapping the first openings; Step D of forming a second uncured resin layer on the side of the substrate where the first uncured resin layer is formed; Step E of bringing a second diffractive pattern different from the first diffractive pattern formed in a rectangular range of one side of a second master plate over a diagonal size of 10 inches or more into contact with the second uncured resin layer; Step F of disposing a second mask having a plurality of second openings formed based on a second array pattern different from the first array pattern on the second master plate and irradiating light to cure a portion of the second uncured resin layer overlapping the second openings; and comprising: A method for manufacturing a diffractive sheet.

7. The hardness of the first uncured resin layer after curing is 0.5 MPa to 100 GPa at room temperature, The method for manufacturing a diffraction sheet according to claim 6.

8. In the step D, the second uncured resin layer is formed thicker than the first uncured resin layer, The method for manufacturing a diffraction sheet according to claim 6.

9. The difference in thickness between the second uncured resin layer and the first uncured resin layer is equal to or greater than the height of the second diffraction pattern, The method for manufacturing a diffraction sheet according to claim 8.

10. At least one of the first plate and the second plate has a release layer on one surface thereof, The method for manufacturing a diffraction sheet according to claim 6.

11. The release layer is mainly composed of any one of a thermosetting resin, silicone, a fluororesin, and a polymer containing an alkyl group, The method for manufacturing a diffraction sheet according to claim 10.

12. A transparent substrate, A diffraction layer including a first diffraction pattern arranged in a first arrangement pattern on the substrate and a second diffraction pattern arranged in a second arrangement pattern different from the first arrangement pattern on the same side of the substrate as the first diffraction pattern, Comprising, The first diffraction pattern and the second diffraction pattern are single-layer resin layers formed of a photocurable resin and having surface irregularities, The second diffraction pattern is thicker than the first diffraction pattern, The planar shape is a rectangle with a diagonal of 10 inches or more, Diffraction sheet.

13. The difference in thickness between the second diffraction pattern and the first diffraction pattern is equal to or greater than the depth of the surface irregularities of the second diffraction pattern, The diffraction sheet according to claim 12.

14. The difference in thickness between the second diffraction pattern and the first diffraction pattern is 100 nm or more and 10 μm or less, The diffraction sheet according to claim 12.

15. Provided between the first diffraction pattern and the second diffraction pattern and the substrate, further comprising a color filter including a plurality of color filters, In a plan view, the deviation between the first diffraction pattern and the second diffraction pattern and the color filter is 1 / 10 or less of the pitch of the color filter, The diffraction sheet according to claim 12.

16. The first diffraction pattern and the second diffraction pattern contain a coloring material, The diffraction layer functions as a color filter, The diffraction sheet according to claim 12.

17. having a gap of 1 μm or more and 100 μm or less between the first diffraction pattern and the second diffraction pattern, The diffraction sheet according to claim 12.

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