Glare contrast correction method, comparison method and comparison device, electronic display manufacturing method and anti-glare layer manufacturing method

Abstract

The method for correcting glare contrast comprises: a process of obtaining a first glare contrast as a comparison reference generated by an anti-glare layer arranged on the surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast is measured under a first measurement condition using a first imaging lens that images the outgoing light from the anti-glare layer and a first two-dimensional image sensor that images the outgoing light; a process of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition, wherein the second glare contrast is measured under a second measurement condition different from the first measurement condition using a second imaging lens that images the outgoing light from the anti-glare layer and a second two-dimensional image sensor that images the outgoing light; and a process of correcting the second glare contrast based on a ratio of the first measurement condition to the second measurement condition for comparison with the first glare contrast.

Description

Technical Field

[0001] The present disclosure relates to a correction method, a comparison method and a comparison device for glare contrast, a method for manufacturing an electronic display, and a method for manufacturing an anti-glare layer. Background Art

[0002] JP2009-175041A discloses a technique for quantitatively measuring and evaluating the brightness deviation caused by glare in a display image of an electronic display equipped with an anti-glare film. The glare measurement method described in JP2009-175041A is configured to remove fixed periodic components from the electronic display other than glare from a glare image captured by a camera through image processing using a two-dimensional Fourier transform. In addition, the glare measurement method described in JP2009-175041A is configured to evaluate the glare contrast by dividing the standard deviation of the brightness deviation of the glare image from which the fixed periodic components have been removed by the average value.

[0003] However, the glare measurement device described in JP2009-175041A does not examine the influence of shooting conditions on glare contrast. In addition, the glare measurement device described in JP2009-175041A does not propose any effective solution for appropriately comparing a plurality of glare contrasts measured under different measurement conditions. Summary of the invention

[0004] The present disclosure is completed in consideration of the above aspects. That is, the purpose of the present disclosure is to provide a glare contrast correction method, a comparison method and a comparison device, a method for manufacturing an electronic display, and a method for manufacturing an anti-glare layer that can appropriately compare multiple glare contrasts under different measurement conditions.

[0005] The glare contrast correction method disclosed in the present invention has the following features:

[0006] A step of obtaining a first glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast ratio is measured under the first measurement condition using a first imaging lens for imaging outgoing light from the anti-glare layer and a first two-dimensional image sensor for imaging the outgoing light;

[0007] A step of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition different from the first measurement condition, wherein the second glare contrast is measured under the second measurement condition using a second imaging lens for imaging the outgoing light from the anti-glare layer and a second two-dimensional image sensor for imaging the outgoing light; and

[0008] and a step of correcting the second glare contrast based on a ratio of the first measurement condition to the second measurement condition for comparison with the first glare contrast.

[0009] In the glare contrast correction method disclosed in the present invention, the step of correcting the second glare contrast can be performed according to the following formula (1):

[0010] S P 2a=S P 2×(F2 / F1)×(d2 / d1)×(f1 / f2)×(M2 / M1) 0.5 (1)

[0011] in,

[0012] S P 2a: Corrected 2nd glare contrast;

[0013] S P 2: 2nd glare contrast before correction;

[0014] F1: image-side effective F value of the first imaging lens as the first measurement condition;

[0015] F2: image-side effective F value of the second imaging lens as the second measurement condition;

[0016] d1: the distance from the anti-glare layer to the first imaging lens as the first measurement condition;

[0017] d2: the distance from the anti-glare layer to the second imaging lens as the second measurement condition;

[0018] f1: the effective focal length of the first imaging lens as the first measurement condition;

[0019] f2: the effective focal length of the second imaging lens as the second measurement condition;

[0020] M1: the value shown in the following formula (2);

[0021] M2: The value shown in the following formula (3),

[0022] [Formula 1]

[0023]

[0024] in,

[0025] Ac1: When the wavelength of the emitted light is defined as λ, (((4 / π)×F1×λ) / 2) 2 ×π represents the parameter;

[0026] Am1: When the pixel pitch of the first two-dimensional image sensor as the first measurement condition is defined as p1, p1 2 The parameters represented;

[0027] erf: standard error function,

[0028] [Formula 2]

[0029]

[0030] in,

[0031] Ac2: When the wavelength of the emitted light is defined as λ, (((4 / π)×F2×λ) / 2) 2 ×π represents the parameter;

[0032] Am2: When the pixel pitch of the second two-dimensional image sensor as the second measurement condition is defined as p2, p2 2 Represents the parameters.

[0033] In the glare contrast correction method disclosed in the present invention, the step of correcting the second glare contrast can be performed according to the following formula (4):

[0034] S P 2a=S P 2×(F2 / F1)×(m1 / m2)×(M2 / M1) 0.5 (4)

[0035] in,

[0036] S P 2a: Corrected 2nd glare contrast;

[0037] S P 2: 2nd glare contrast before correction;

[0038] F1: image-side effective F value of the first imaging lens as the first measurement condition;

[0039] F2: image-side effective F value of the second imaging lens as the second measurement condition;

[0040] m1: the magnification of the first imaging lens as the first measurement condition;

[0041] m2: the magnification of the second imaging lens as the second measurement condition;

[0042] M1: the value shown in the following formula (2);

[0043] M2: The value shown in the following formula (3),

[0044] [Formula 3]

[0045]

[0046] in,

[0047] Ac1: When the wavelength of the emitted light is defined as λ, (((4 / π)×F1×λ) / 2) 2 ×π represents the parameter;

[0048] Am1: When the pixel pitch of the first two-dimensional image sensor as the first measurement condition is defined as p1, p1 2 Parameters represented;

[0049] erf: standard error function,

[0050] [Formula 4]

[0051]

[0052] in,

[0053] Ac2: When the wavelength of the emitted light is defined as λ, (((4 / π)×F2×λ) / 2) 2 ×π represents the parameter;

[0054] Am2: When the pixel pitch of the second two-dimensional image sensor as the second measurement condition is defined as p2, p2 2 Represents the parameters.

[0055] In the glare contrast correction method disclosed in the present invention, the step of correcting the second glare contrast can be performed according to the following formula (5):

[0056] S P 2a=S P 2×(F2' / F1')×(M2 / M1) 0.5 (5)

[0057] in,

[0058] S P 2a: Corrected 2nd glare contrast;

[0059] S P 2: 2nd glare contrast before correction;

[0060] F1′: the object-side effective F value of the first imaging lens as the first measurement condition;

[0061] F2': the object-side effective F value of the second imaging lens as the second measurement condition;

[0062] M1: the value shown in the following formula (2);

[0063] M2: The value shown in the following formula (3),

[0064] [Formula 5]

[0065]

[0066] in,

[0067] Ac1: When the wavelength of the emitted light is defined as λ, (((4 / π)×F1×λ) / 2) 2 ×π represents the parameter;

[0068] Am1: When the pixel pitch of the first two-dimensional image sensor as the first measurement condition is defined as p1, p1 2 Parameters represented;

[0069] erf: standard error function,

[0070] [Formula 6]

[0071]

[0072] in,

[0073] Ac2: When the wavelength of the emitted light is defined as λ, (((4 / π)×F2×λ) / 2) 2 ×π represents the parameter;

[0074] Am2: When the pixel pitch of the second two-dimensional image sensor as the second measurement condition is defined as p2, p2 2 Represents the parameters.

[0075] The glare contrast correction method disclosed in the present invention has the following features:

[0076] A step of obtaining a first glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast ratio is measured under the first measurement condition using a first imaging lens for imaging outgoing light from the anti-glare layer and a first two-dimensional image sensor for imaging the outgoing light;

[0077] A step of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition different from the first measurement condition, wherein the second glare contrast is measured under the second measurement condition using a second imaging lens for imaging the outgoing light from the anti-glare layer and a second two-dimensional image sensor for imaging the outgoing light; and

[0078] a step of correcting the second glare contrast in order to compare with the first glare contrast,

[0079] The process of correcting the second glare contrast comprises:

[0080] When the following equation (6) holds true between the first measurement condition and the second measurement condition, a correction operation is performed on the image of the outgoing light captured under the second measurement condition in such a manner that the MTF calculated based on the image is consistent with the image of the outgoing light captured under the first measurement condition; and

[0081] a step of obtaining a corrected second glare contrast from the image obtained by the correction operation,

[0082] S1=S2 (6)

[0083] in,

[0084] S1: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the emitted light to be imaged on the first two-dimensional image sensor, which is the first measurement condition and satisfies the following equation (7);

[0085] S2: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the emitted light to be imaged on the second two-dimensional image sensor as the second measurement condition, and satisfies the following equation (8),

[0086] [Formula 7]

[0087]

[0088] in,

[0089] R1: the size of the diffraction-limited spot on the first two-dimensional image sensor;

[0090] m1: the magnification of the first imaging lens as the first measurement condition;

[0091] F1: image-side effective F value of the first imaging lens as the first measurement condition;

[0092] d1: the distance from the anti-glare layer to the first imaging lens as the first measurement condition;

[0093] f1: the effective focal length of the first imaging lens as the first measurement condition;

[0094] F1': the object-side effective F value of the first imaging lens as the first measurement condition,

[0095] [Formula 8]

[0096]

[0097] in,

[0098] R2: the size of the diffraction-limited spot on the second two-dimensional image sensor;

[0099] m2: the magnification of the second imaging lens as the second measurement condition;

[0100] F2: image-side effective F value of the second imaging lens as the second measurement condition;

[0101] d2: the distance from the anti-glare layer to the second imaging lens as the second measurement condition;

[0102] f2: the effective focal length of the second imaging lens as the second measurement condition;

[0103] F2′: the object-side effective F value of the second imaging lens as the second measurement condition.

[0104] The glare contrast correction method disclosed in the present invention may be:

[0105] The step of performing the correction calculation includes a step of adjusting a coefficient of an enhancement filter for adjusting a resolution of an image of the emission light captured under the second measurement condition.

[0106] The glare contrast correction method disclosed in the present invention may be:

[0107] The step of performing the correction operation further comprises:

[0108] a step of generating an edge profile of an image of the outgoing light captured under the second measurement condition;

[0109] The step of calculating a line spread function by differentiating the generated edge profile;

[0110] A step of calculating the MTF by performing Fourier transform on the calculated line spread function; and

[0111] A step of comparing the calculated MTF with the MTF based on the image of the emitted light captured under the first measurement condition.

[0112] The glare contrast correction method disclosed in the present invention may be:

[0113] The process of correcting the second glare contrast includes a process of making the average radiation brightness of the image obtained by the correction operation consistent with the average radiation brightness of the image of the outgoing light taken under the first measurement condition between the process of performing correction operation on the image of the outgoing light taken under the second measurement condition and the process of obtaining the corrected second glare contrast from the image obtained by the correction operation.

[0114] The glare contrast correction method disclosed in the present invention may be:

[0115] The process of correcting the second glare contrast includes a process of removing image components generated by pixels of the electronic display from the image obtained by the correction operation, between the process of performing correction operation on the image of the outgoing light photographed under the second measurement condition and the process of making the average radiation brightness of the image obtained by the correction operation consistent with the average radiation brightness of the image of the outgoing light photographed under the first measurement condition.

[0116] The glare contrast correction method disclosed in the present invention has the following features:

[0117] A step of obtaining a third glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating hypothetical measurement conditions, wherein the third glare contrast ratio is hypothetically measured under the hypothetical measurement conditions using a hypothetical imaging lens for imaging outgoing light from the anti-glare layer and a hypothetical two-dimensional image sensor for imaging the outgoing light;

[0118] A step of obtaining a fourth glare contrast as a comparison object generated by the anti-glare layer and information indicating actual measurement conditions, wherein the fourth glare contrast is actually measured under the actual measurement conditions using an actual imaging lens that images the outgoing light from the anti-glare layer and an actual two-dimensional image sensor that images the outgoing light; and

[0119] a step of correcting the fourth glare contrast for comparison with the third glare contrast,

[0120] The step of correcting the fourth glare contrast comprises the following steps: when the following equation (9) holds true between the hypothetical measurement conditions and the actual measurement conditions, correcting the fourth glare contrast according to the following equation (10),

[0121] S3≠S4 (9)

[0122] S P 4a=S P 4×(S4 / S3) (10)

[0123] in,

[0124] S3: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the outgoing light from the anti-glare layer to be imaged on the two-dimensional image sensor as the hypothetical measurement condition, and satisfies the following equation (11);

[0125] S4: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the outgoing light from the anti-glare layer to be imaged on the two-dimensional image sensor as the actual measurement condition, and satisfies the following formula (12);

[0126] S P 4a: 4th glare contrast after correction;

[0127] S P 4: 4th glare contrast before correction,

[0128] [Formula 9]

[0129]

[0130] in,

[0131] R3: the size of the diffraction-limited spot on the two-dimensional image sensor;

[0132] m3: magnification of the imaging lens as the hypothetical measurement condition;

[0133] F3: the image-side effective F value of the imaging lens as the hypothetical measurement condition;

[0134] d3: the distance from the anti-glare layer to the imaging lens as the hypothetical measurement condition;

[0135] f3: the effective focal length of the imaging lens as the hypothetical measurement condition;

[0136] F3': effective F value on the object side of the imaging lens as the hypothetical measurement condition,

[0137] [Formula 10]

[0138]

[0139] in,

[0140] R4: the size of the diffraction-limited spot on the two-dimensional image sensor;

[0141] m4: magnification of the imaging lens as the actual measurement condition;

[0142] F4: the image side effective F value of the imaging lens as the actual measurement condition;

[0143] d4: the distance from the anti-glare layer to the imaging lens as the actual measurement condition;

[0144] f4: the effective focal length of the imaging lens as the actual measurement condition;

[0145] F4′: The object-side effective F value of the imaging lens as the actual measurement condition.

[0146] The glare contrast correction method disclosed in the present invention may be:

[0147] The step of correcting the fourth glare contrast further includes the step of correcting the fourth glare contrast according to the following equation (13):

[0148] S P 4a'=S P 4a×(M4 / M3) 0.5 (13)

[0149] in,

[0150] S P 4a': the fourth glare contrast after correction based on equation (13);

[0151] M3: the value shown in the following formula (14);

[0152] M4: The value shown in the following formula (15),

[0153] [Formula 11]

[0154]

[0155] in,

[0156] Ac3: When the wavelength of the emitted light is defined as λ, (((4 / π)×F3×λ) / 2) 2 ×π represents the parameter;

[0157] Am3: When the pixel pitch of the two-dimensional image sensor as the hypothetical measurement condition is defined as p3, p3 2 Parameters represented;

[0158] erf: standard error function,

[0159] [Formula 12]

[0160]

[0161] in,

[0162] Ac4: When the wavelength of the emitted light is defined as λ, (((4 / π)×F4×λ) / 2) 2 ×π represents the parameter;

[0163] Am4: When the pixel pitch of the two-dimensional image sensor as the hypothetical measurement condition is defined as p4, 2 Represents the parameters.

[0164] The glare contrast correction method disclosed in the present invention may be:

[0165] Between the first measurement condition and the second measurement condition, or between the hypothetical measurement condition and the actual measurement condition, the following relationship holds: the electronic display, the anti-glare layer, and the measuring device including a camera lens and a two-dimensional image sensor are respectively the same in structural conditions, but the measurement conditions using the measuring device, including the distance from the anti-glare layer to the camera lens, are different.

[0166] The glare contrast correction method disclosed in the present invention may be:

[0167] Between the first measurement condition and the second measurement condition, or between the hypothetical measurement condition and the actual measurement condition, the following relationship holds: the structural conditions of the electronic display and the anti-glare layer are the same, while the structural conditions of a measuring device including a camera lens and a two-dimensional image sensor and the measurement conditions using the measuring device including the distance from the anti-glare layer to the camera lens are different.

[0168] The glare contrast correction method disclosed in the present invention may be:

[0169] Between the first measurement condition and the second measurement condition, or between the hypothetical measurement condition and the actual measurement condition, the structural conditions of the electronic display and the measuring device including the imaging lens and the two-dimensional image sensor are the same, and the structural conditions of the anti-glare layer and the measurement conditions using the measuring device including the distance from the anti-glare layer to the imaging lens are different.

[0170] The glare contrast comparison method disclosed in the present invention includes the step of comparing the glare contrast as a comparison object corrected by the glare contrast correction method with the glare contrast as a comparison reference.

[0171] The glare contrast comparison method of the present disclosure may be,

[0172] The glare contrast comparison method further includes a step of outputting a comparison result between the corrected glare contrast as a comparison target and the glare contrast as a comparison reference.

[0173] The method for manufacturing an electronic display disclosed in the present invention comprises a step of inspecting whether the electronic display to be inspected satisfies a qualified standard of glare contrast.

[0174] The step of inspecting includes the step of comparing.

[0175] The comparison process is as follows: applying the glare contrast of the electronic display as the inspection object as one of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, applying the glare contrast of the qualified benchmark as the other of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, and comparing the glare contrast of the electronic display as the inspection object with the glare contrast of the qualified benchmark.

[0176] In the manufacturing method of the electronic display disclosed in the present invention, it may be that:

[0177] The electronic display to be inspected is an electronic display without an anti-glare layer on the surface, and in the inspection step, an anti-glare layer for inspection is arranged on the surface in order to measure the glare contrast.

[0178] The anti-glare layer for inspection is an anti-glare layer having predetermined characteristics.

[0179] In the manufacturing method of the electronic display disclosed in the present invention, it may be that:

[0180] The electronic display to be inspected is an electronic display having an anti-glare layer disposed on the surface.

[0181] The method for producing an anti-glare layer disclosed herein comprises:

[0182] a step of forming an anti-glare layer to be inspected; and

[0183] The step of inspecting whether the anti-glare layer as the inspection object meets the qualified standard of glare contrast,

[0184] The step of inspecting includes the step of comparing.

[0185] The comparison process includes the following steps: applying the glare contrast of an electronic display having the anti-glare layer as the inspection object configured on the surface as one of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, applying the glare contrast of the qualified benchmark as the other of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, and comparing the glare contrast of the electronic display having the anti-glare layer as the inspection object configured on the surface with the glare contrast of the qualified benchmark.

[0186] In the method for producing the anti-glare layer of the present disclosure, it may be that:

[0187] In the inspection step, the anti-glare layer to be inspected is arranged on the surface of the electronic display for inspection in order to measure the glare contrast.

[0188] The electronic display for inspection is an electronic display having predetermined characteristics.

[0189] In the method for producing the anti-glare layer of the present disclosure, it may be that:

[0190] The step of forming the anti-glare layer to be inspected includes the step of providing a layer having an anti-glare function on a substrate.

[0191] The step of providing the layer having an anti-glare function on the substrate may include:

[0192] A step of coating an anti-glare layer composition containing a resin on the substrate; and

[0193] A step of curing the applied anti-glare layer composition.

[0194] The anti-glare layer of the present disclosure is an anti-glare layer produced using the method for producing an anti-glare layer.

[0195] The glare contrast comparison device disclosed in the present invention comprises:

[0196] a correction unit that corrects the glare contrast as a comparison object using the glare contrast correction method; and

[0197] The comparison unit compares the corrected glare contrast as a comparison object with the glare contrast as a comparison reference.

[0198] The method for selecting an anti-glare layer disclosed in the present invention comprises a step of selecting an anti-glare layer using the glare contrast comparison method.

[0199] The process of selecting the anti-glare layer comprises the following steps:

[0200] The steps of applying a first measured contrast obtained by measuring the glare contrast of an electronic display having a first anti-glare layer disposed on a surface by a first optical measuring device as the glare contrast serving as the comparison reference, applying a second measured contrast obtained by measuring the glare contrast of the electronic display having a second anti-glare layer different from the first anti-glare layer disposed on a surface by a second optical measuring device different from the first optical measuring device as the glare contrast serving as the comparison object, and comparing the first measured contrast and the second measured contrast using the comparison method accompanied by correction of one of the two contrasts, the first measured contrast and the second measured contrast; and

[0201] A step of selecting one of the first anti-glare layer and the second anti-glare layer based on the comparison result.

[0202] In the method for selecting the anti-glare layer of the present disclosure, it may be,

[0203] The step of selecting the one anti-glare layer includes the step of selecting an anti-glare layer having a good corresponding measured contrast between the first anti-glare layer and the second anti-glare layer.

[0204] The anti-glare layer of the present disclosure is an anti-glare layer selected according to the method for selecting the anti-glare layer.

[0205] The polarizing plate disclosed in the present invention is a polarizing plate carrying an anti-glare layer selected according to the method for selecting an anti-glare layer.

[0206] The display element of the present disclosure is a display element equipped with an anti-glare layer selected according to the method for selecting an anti-glare layer.

[0207] The electronic display disclosed herein is an electronic display equipped with the anti-glare layer selected according to the anti-glare layer selection method.

[0208] The method for selecting a display element disclosed in the present invention comprises the step of selecting an electronic display, that is, a display element, which does not have an anti-glare layer on its surface, using the glare contrast comparison method.

[0209] The process of selecting the display element includes the following steps:

[0210] A step of applying a third measured contrast measured by a third optical measuring device in a state where a third anti-glare layer is disposed on a surface of a first display element as the glare contrast serving as the comparison reference, applying a fourth measured contrast measured by a fourth optical measuring device different from the third optical measuring device in a state where the third anti-glare layer is disposed on a surface of a second display element different from the first display element as the glare contrast serving as the comparison object, and comparing the third measured contrast and the fourth measured contrast using the comparison method accompanied by correction of one of the third measured contrast and the fourth measured contrast; and

[0211] A step of selecting one of the first display element and the second display element based on a result of the comparison.

[0212] In the method for selecting a display element disclosed in the present invention, it may be that:

[0213] The step of selecting the one display element includes the step of selecting a display element having a good corresponding measured contrast ratio between the first display element and the second display element.

[0214] The electronic display disclosed herein is an electronic display including display elements selected according to the display element selection method.

[0215] The glare contrast correction method disclosed in the present invention has the following features:

[0216] A step of obtaining a plurality of glare contrasts generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a plurality of measurement conditions, wherein the plurality of glare contrasts are measured under a plurality of different measurement conditions; and

[0217] and a step of correcting at least one of the plurality of glare contrasts based on the information indicating the plurality of measurement conditions in order to compare the plurality of glare contrasts.

[0218] The manufacturing device of the anti-glare layer disclosed in the present invention comprises the above-mentioned comparative device,

[0219] The correction unit corrects the glare contrast of the electronic display having an anti-glare layer as the inspection object on the surface to obtain the glare contrast as the comparison object.

[0220] The comparing unit compares the glare contrast of the electronic display having the anti-glare layer to be inspected disposed on the surface thereof with the glare contrast of the acceptance standard serving as the glare contrast serving as the comparison standard.

[0221] According to the present disclosure, a plurality of glare contrasts having different measurement conditions can be appropriately compared. BRIEF DESCRIPTION OF THE DRAWINGS

[0222] Figure 1 : is a flowchart showing the glare contrast comparison method according to the present embodiment.

[0223] Figure 2 It is shown that it can be used for Figure 1 FIG. 1 is a diagram of an example of a measurement system of a glare contrast comparison method.

[0224] Figure 3 It is used to illustrate Figure 1 An illustration of the glare contrast comparison method.

[0225] Figure 4 This is a flowchart showing a glare contrast comparison method according to the first modified example of the present embodiment.

[0226] Figure 5 This is a flowchart showing a glare contrast comparison method according to the second modified example of the present embodiment.

[0227] Fig. 6A This is a flowchart showing an example of a glare contrast comparison method according to the third modified example of the present embodiment.

[0228] Figure 6B is shown with Fig. 6A A flowchart of an example of a glare contrast comparison method according to a third modified example of the present embodiment is different.

[0229] Figure 6C It is used to illustrate Figure 6B An illustration of some steps of a flowchart.

[0230] Fig.6D is shown with Fig. 6A and Figure 6B A flowchart of an example of a glare contrast comparison method according to a third modified example of the present embodiment is different.

[0231] Figure 7 It is shown Figures 6A to 6C A flowchart is a detailed example of a part of the process of the flowchart.

[0232] Figure 8 This is a flowchart showing a glare contrast comparison method according to the fourth modified example of the present embodiment.

[0233] Fig. 9 This is a flowchart showing a glare contrast comparison method according to the fifth modification of the present embodiment.

[0234] Fig.10 This is a perspective view showing an example of a pseudo display that can be used in the glare contrast comparison method of the present embodiment.

[0235] Fig.11 is a diagram showing a specific measurement system of glare contrast. DETAILED DESCRIPTION

[0236] Hereinafter, one embodiment of the present disclosure will be described with reference to the accompanying drawings. In addition, in the drawings attached to the present application specification, the scale and aspect ratio are appropriately changed and exaggerated relative to the scale and aspect ratio of the actual object for the sake of convenience of illustration and understanding.

[0237] In addition, the terms such as "same", "identical", and the values ​​of lengths or angles used in this specification to limit shapes, geometric conditions, and their degrees are not limited to the strict meanings, but are interpreted to include the range to which the same functions can be expected.

[0238] In addition, the optical terms used in this specification comply with JIS Z8120: 2001 Optical Terms. In addition, in the term "predetermined characteristics" used in this specification, "characteristics" refers to all characteristics such as optical characteristics and physical characteristics. In particular, it refers to the characteristics required for each formula, each correction method, each manufacturing method, each selection method, etc. disclosed in this disclosure.

[0239] Figure 1 : is a flowchart showing the glare contrast comparison method according to the present embodiment. Figure 2 It is shown that it can be used for Figure 1 FIG. 1 is a diagram of an example of a measurement system of a glare contrast comparison method.

[0240] The glare contrast comparison method of the present embodiment can be used to appropriately compare the glare contrast generated by the anti-glare layer disposed on the surface of a light-emitting electronic display even when the measurement conditions are different.

[0241] Glare refers to the following phenomenon: due to the scattering and refraction of light emitted from the pixel matrix of the display element of the display when passing through a finely concave-convex medium and a refractive index modulation layer, etc., a small brightness distribution of the pixel matrix size is caused on the screen, which appears to be flickering. Glare is also called glitter (パークル) or flicker (パークリング), but it is expressed as "glare" in this application. In more detail, the glare of this application refers to an irregular spatially modulated image that is formed on the sensor surface of the observer's visual system as a result of imaging by a combination of a pixel matrix of a direct-view display and a diffusion layer arranged near the surface of the display.

[0242] The glare contrast refers to the value of the glare value expressed as a percentage of the average value of all the illuminance distribution data constituting the glare pattern. The glare value refers to the standard deviation of all the illuminance distribution data constituting the glare pattern. The glare pattern is equivalent to: the illuminance distribution on the surface of the imaging element when the display screen of the display lit with a single color is photographed within the measurement range. In more detail, the glare pattern refers to: the 2D illuminance distribution data of the image component obtained by shooting, in which the pixel shape of the display element of the display cannot be seen, or the 2D grayscale data in which the influence of the pixel shape is excluded from the illuminance distribution data of the image component in which the pixel shape of the display element of the display can be seen.

[0243] However, as shown below, the glare contrast can be defined using the radiance distribution instead of the illuminance distribution. That is, the glare contrast is defined by the following formula as a representative evaluation index indicating the degree of glare.

[0244] [Formula 13]

[0245]

[0246] In equation (16), σ is the standard deviation of the radiant brightness distribution of the monochromatic glare pattern on the two-dimensional image sensor surface used for measurement.

[0247] [Formula 14]

[0248]

[0249] It is the average value of the radiance of the monochromatic glare pattern. As the denominator and numerator on the right side of the equation (16), brightness may be used instead of radiance.

[0250] To compare the glare contrast like this, Figure 2 The illustrated measuring system includes an electronic display 8 , a first optical measuring device 1A, a second optical measuring device 1B, and a comparison device 100 .

[0251] The first optical measurement device 1A is a device for measuring a first glare contrast as a comparison reference. The second optical measurement device 1B is a device for measuring a second glare contrast as a comparison target. The comparison device 100 is a device for comparing the first glare contrast and the second glare contrast.

[0252] More specifically, the electronic display 8 has a pixel matrix 81 and a black matrix 82, and an anti-glare layer 9 as a diffusion layer is stacked on the surface of the electronic display 8. The anti-glare layer 9 refers to, for example, a light diffusion layer provided on the surface of the display 8 to suppress reflected light caused by external light. The black matrix 82 includes, in addition to the conventionally known black matrix itself, other structures having a black matrix function for preventing color mixing.

[0253] As the electronic display 8, for example, a liquid crystal display, an organic EL display, a quantum dot (QD) display, a mini LED display, a micro LED display, etc. can be used. The electronic display 8 can also be a pseudo display. A pseudo display refers to a structure in which a medium that simulates a pixel matrix is ​​arranged on a planar diffuse light source. The pixel matrix can exist directly on the diffuse light source or can be stacked separately. For example, Fig.10 As shown, by setting a metal mask 803 that simulates pixels on the light-emitting portion 802 of the planar white light source 801, a pseudo display 800 can be produced.

[0254] As for the anti-glare layer 9, there is no particular limitation as long as it is a structure with an anti-glare function. The anti-glare function refers to a function that blurs the outline of an object or light reflected in the anti-glare layer and makes it difficult to see, or blurs the reflected object or light itself and makes it difficult to see, and is a function that can prevent glare or improve the visual recognition of text information, dynamic images, images, etc. that are intended to be displayed on the display. The surface of the anti-glare layer usually has a concave-convex shape, and as long as the anti-glare function can be exhibited, it can also be a very fine concave-convex shape. For example, the anti-glare layer 9 can be: (A) a laminated body formed by arranging a single layer or multiple layers with an anti-glare function on a substrate; (B) a substrate having an anti-glare function on the surface of the substrate itself; (C) a display or an evaluation color filter or other items formed by mounting A or B on the surface. In addition, the layer that exhibits the anti-glare function of the anti-glare layer 9 can exist at any position in the multiple layers constituting the anti-glare layer. It can be located at any position of the layer located on the visual recognition side, the inner side of the display, and then located between the visual recognition side and the inner side of the display, and can even be present in the above-mentioned multiple positions. The anti-glare layer 9 is arranged on the surface of the electronic display, which means that it is a component arranged on the visual recognition side than the pixel matrix 81 and the black matrix 82 of the electronic display 8, and glare is generated by being arranged there. As a more specific example, the anti-glare layer 9 can also be an anti-glare layer 9 on glass or plastic provided with appropriate concavities and convexities by sandblasting or chemical etching. Alternatively, the anti-glare layer 9 can also be an anti-glare layer 9 as follows: a reactive organic / inorganic resin adhesive, organic / inorganic particles of various particle sizes, etc. are applied singly or mixedly on a thin glass film or plastic film of less than 100 μm and cured, thereby providing concavities and convexities. Alternatively, the anti-glare layer 9 can also be an anti-glare layer 9 provided with embossed concavities and convexities based on a mold, a shaped film, etc. In addition, the anti-glare layer 9 may be as follows: for the above-mentioned coating composition formed by mixing a binder, organic / inorganic particles having a different refractive index from the binder, or a coating composition containing a binder formed by mixing a plurality of resins with low compatibility or a plurality of resins with different refractive indexes, etc., coating or processing is performed in a manner that makes the concavoconvexity very fine, and it is dried and cured. According to the selection method of the anti-glare layer 9 described in [3. Selection method of anti-glare layer and product equipped with anti-glare layer] described later, a good anti-glare layer 9 that can suppress glare can be easily obtained. In addition, the plastic film used for the anti-glare layer 9 can be an anti-glare layer 9 using acrylic, polyester, cyclic olefin, cellulose resin, etc., but is not limited to this. In addition, in the case where the anti-glare layer 9 is a laminated body provided with multiple layers, a low-reflection layer having a refractive index lower than the refractive index of the binder of the anti-glare layer, an anti-fouling layer for showing anti-fouling properties, etc. can be laminated. In this case, these laminated bodies are the anti-glare layer 9 as a whole.Furthermore, in the absence of the anti-glare layer 9, that is, even in a flat planar structure that does not exhibit an anti-glare function, glare can be observed by internal diffusion when there is a refractive index difference in the resin component or particles constituting the binder, so glare contrast measurement can be performed in the same manner as in the anti-glare layer 9. The morphology of the internal diffusion has a random structure in the same manner as in the anti-glare layer 9.

[0255] like Figure 2 As shown in FIG. 1 , the second optical measurement device 1B includes a second optical system 3B, a second two-dimensional image sensor 4B, and a second calculation unit 6B. In addition, although the illustration is simplified, the first optical measurement device 1A includes a first optical system 3A, a first two-dimensional image sensor 4A, and a first calculation unit 6A. The components of these optical measurement devices 1A and 1B are described in detail below.

[0256] (Optical systems 3A, 3B)

[0257] The second optical system 3B is a device that refracts the outgoing light L from the anti-glare layer 9 and forms an image on the two-dimensional sensor array surface 41 of the second two-dimensional image sensor 4B. The first optical system 3A is a device that refracts the outgoing light L from the anti-glare layer 9 and forms an image on the two-dimensional sensor array surface 41 of the first two-dimensional image sensor 4A.

[0258] The second optical system 3B includes a second imaging lens 31B and a second aperture 32B provided with an opening 321. Similar to the second optical system 3B, the first optical system 3A includes a first imaging lens 31A and a first aperture 32A.

[0259] The parameters of the optical systems 3A and 3B will affect the magnitude of the glare contrast.

[0260] For example, the smaller the opening 321 of the aperture 32A, 32B, that is, the larger the F value of the imaging lens 31A, 31B, the more significant the effect of diffraction on the outgoing light L due to the opening 321 of the aperture 32A, 32B. Since the diffraction of the outgoing light L becomes significant, the expansion of the diffraction-limited light spot of the outgoing light L imaged on the two-dimensional sensor array surface 41, that is, the Airy disk, becomes larger. As a result, the diffraction-limited light spot expands not only to one pixel 42 of the two-dimensional image sensor 4A, 4B, but also to other adjacent pixels 42.

[0261] Such expansion of the diffraction-limited light spot occurs in each diffraction-limited light spot imaged on each pixel 42 of the two-dimensional image sensors 4A and 4B. Thus, with a focus on a specific pixel 42, the emitted light L passing through different parts of the anti-glare layer 9 overlaps with each other on the specific pixel 42, thereby causing averaging of the glare pattern.

[0262] The greater the degree of averaging of the glare pattern on the pixel 42 , the lower the glare contrast. In other words, the larger the F value of the imaging lenses 31A and 31B, the lower the glare contrast due to the averaging effect on the pixel 42 .

[0263] On the other hand, since the F value becomes too small, the glare contrast is reduced even when the average particle size of the glare pattern formed on the two-dimensional sensor array surface 41 is smaller than the pixel 42. The reason for the reduction in the glare contrast is that the expansion of the diffraction-limited light spot is too narrow relative to the pixel 42, resulting in a distribution of the amount of light received within one pixel 42. More specifically, the reduction in the glare contrast is due to the fact that the output value of one pixel 42 becomes the integral value of the glare pattern within the pixel 42 according to the distribution of the amount of light received. That is, when the F value of the imaging lenses 31A and 31B becomes too small, the glare contrast is reduced due to the integral effect of the glare pattern within the pixel 42.

[0264] As described above, the F value of the imaging lens 31 affects the glare contrast. Specifically, the contrast decreases due to the averaging effect caused by the overlapping of different patterns on the pixel 42 as the F value increases. In addition, the glare contrast also decreases due to the integration effect within the pixel 42 accompanying the decrease in the F value.

[0265] In addition, Figure 2 In the example shown, the second imaging lens 31B is composed of one lens. However, the imaging lenses 31A and 31B may be respectively composed of multiple lenses. In this case, the multiple lenses constituting the imaging lenses 31A and 31B may also have a combined optical power suitable for reducing the aberration of the outgoing light L. In addition, the optical systems 3A and 3B may also include an optical filter 33. The optical filter 33 is an optical element that changes the intensity, complex amplitude, spectral distribution, vibration surface, etc. of the incident light and then emits it. For example, the optical filter 33 may also be a Y filter having a light transmission characteristic according to the Y value function in the XYZ color function defined in the International Commission on Illumination CIE1931. The optical filter 33 may also be an XYZ filter having a light transmission characteristic according to the XYZ color function defined in CIE1931. The optical filter 33 may also be an RGB filter having a light transmission characteristic based on the RGB primary colors of the display. The optical filter 33 may be a linear polarization filter that converts incident light into linear polarization and emits it. The optical filter 33 may be a circular polarization filter that converts incident light into circular polarization and emits it. The optical filter 33 may also be an ND filter that reduces the amount of incident light and then emits it. The examples of the optical filter 33 are not limited to these. Figure 2 FIG. 4 shows an example in which the optical filter 33 is arranged between the second aperture 32B and the second imaging lens 31B, but the number and position of the optical filter 33 are not limited to Figure 2In addition, the aperture is not limited to Figure 2 The front aperture shown as an example may be an aperture set in the lens configuration section.

[0266] (Two-dimensional image sensors 4A, 4B)

[0267] The two-dimensional image sensors 4A and 4B are imaging elements that form images of the outgoing light L from the anti-glare layer 9. The two-dimensional image sensors 4A and 4B have a two-dimensional sensor array surface 41 and capture images of the outgoing light L.

[0268] The two-dimensional image sensors 4A and 4B have a plurality of adjacent pixels 42, and the surfaces of the pixels 42 constitute a two-dimensional sensor array surface 41. The outgoing light L received by the pixels 42 is converted into an electrical signal by photoelectric conversion, and the converted electrical signal is used for calculating the glare contrast.

[0269] The two-dimensional image sensors 4A and 4B are image sensors having solid-state imaging elements, and may be, for example, CCD (Charge Coupled Device) sensors or CMOS (Complementary Metal Oxide Semiconductor) sensors.

[0270] (Calculation Units 6A, 6B)

[0271] The calculation units 6A and 6B calculate the glare contrast based on the image of the outgoing light L captured by the two-dimensional image sensors 4A and 4B. The calculation units 6A and 6B calculate the glare contrast, for example, according to the above-mentioned formula (16). The calculation units 6A and 6B are composed of hardware such as a CPU and a memory. A part of the calculation units 6A and 6B may also be composed of software. In addition, as the pixel area, i.e., the measurement area, of the two-dimensional image sensors 4A and 4B used in the calculation, i.e., measurement of the glare contrast, it is preferable to use a measurement area with less statistical error. Specifically, if the measurement area is obtained too small, the measurement error of the glare contrast caused by the deviation of the average radiant brightness depending on the location, i.e., the position of the pixel, i.e., the statistical error, tends to become larger. Therefore, in order to reduce the statistical error to an acceptable level, it is preferable to obtain a larger measurement area. In addition, depending on the conditions of the optical systems 3A and 3B, moire fringes are sometimes generated due to the pixel pitch of the two-dimensional image sensors 4A and 4B and the pitch of the pixel matrix 81. In order to avoid moiré fringes, it is preferred to select an appropriate F value of the optical system 3A, 3B or an appropriate measurement distance, that is, the distance from the anti-glare layer 9 to the camera lens 31A, 31B. In the case where moiré fringes are generated, it is preferred that the calculation unit 6A, 6B or the comparison device 100 described later perform a filtering process for removing the moiré fringes from the image afterwards. However, by filtering, not only the moiré fringes are removed, but also the random component of the radiant brightness based on the original glare pattern is sometimes affected. Therefore, in order to correctly compare the glare contrast, it is preferred to consider how the glare contrast is affected by the filtering process in the comparison device 100.

[0272] Next, the configuration of the comparison device 100 will be described. The comparison device 100 includes a correction unit 101 and a comparison unit 102 .

[0273] In order to compare with the first glare contrast, the correction unit 101 corrects the second glare contrast based on the ratio of the first measurement condition to the second measurement condition. A more specific correction method for the second glare contrast is described in the following comparison method. The comparison unit 102 compares the second glare contrast corrected by the correction unit 101 with the first glare contrast. The comparison unit 102 outputs the comparison result.

[0274] (Comparison method of glare contrast)

[0275] Next, the application Figure 2 A specific example of a method for comparing the glare contrast of a measurement system is described.

[0276] First, if Figure 1As shown, the correction unit 101 uses the first camera lens 31A that images the outgoing light L from the anti-glare layer 9, and the first two-dimensional image sensor 4A that images the outgoing light, to obtain the first glare contrast measured under the first measurement condition as a comparison reference, and information representing the first measurement condition (step S1).

[0277] In addition, the correction unit 101 uses the second imaging lens 31B that images the outgoing light L from the anti-glare layer 9 and the second two-dimensional image sensor 4B that images the outgoing light to obtain the second glare contrast measured under the second measurement condition and the information indicating the second measurement condition (step S2). In addition, step S1 and step S2 may be reversed. Alternatively, step S1 and step S2 may be performed simultaneously.

[0278] Next, the correction unit 101 corrects the second glare contrast based on the ratio of the first measurement condition to the second measurement condition for comparison with the first glare contrast (step S3). The second glare contrast is corrected according to the following equation (1).

[0279] S P 2a=S P 2×(F2 / F1)×(d2 / d1)×(f1 / f2)×(M2 / M1) 0.5 (1)

[0280] In formula (1), S P 2a is the second glare contrast after correction. P 2 is the second glare contrast before correction. F1 is the image side effective F value of the first imaging lens 31A as the first measurement condition. F2 is the image side effective F value of the second imaging lens 31B as the second measurement condition. d1 is the distance from the anti-glare layer 9 to the first imaging lens 31A as the first measurement condition, that is, the measurement distance. d2 is the distance from the anti-glare layer 9 to the second imaging lens 31B as the second measurement condition. f1 is the effective focal length of the first imaging lens 31A as the first measurement condition. f2 is the effective focal length of the second imaging lens 31B as the second measurement condition. M1 is the value shown in the following formula (2). M2 is the value shown in the following formula (3). M1 and M2 are sometimes also referred to as comprehensive parameters.

[0281] [Formula 15]

[0282]

[0283] In equation (2), Ac1 is (((4 / π)×F1×λ) / 2) when the wavelength of the emitted light L is defined as λ. 2×π. Ac1 is equivalent to the area of ​​a circle whose diameter is the size R1 of the diffraction-limited spot on the first two-dimensional image sensor 4A described later. Am1 is the area of ​​a circle whose diameter is the size R1 of the diffraction-limited spot on the first two-dimensional image sensor 4A described later. When the pixel pitch of the first two-dimensional image sensor 4A as the first measurement condition is defined as p1, p1 is used as the 2 Parameters represented by Am1. Am1 is equivalent to the area of ​​one pixel of sensor 4A. erf is the standard error function.

[0284] [Formula 16]

[0285]

[0286] In equation (3), Ac2 is (((4 / π)×F2×λ) / 2) when the wavelength of the emitted light L is defined as λ. 2 Ac2 is equivalent to the area of ​​a circle whose diameter is the size R2 of the diffraction-limited spot on the second two-dimensional image sensor 4B described later. Am2 is the area of ​​a circle whose diameter is the size R2 of the diffraction-limited spot on the second two-dimensional image sensor 4B described later. When the pixel pitch of the second two-dimensional image sensor 4B as the second measurement condition is defined as p2, p2 is used as the pixel pitch. 2 Parameters represented by Am2. Am2 is equivalent to the area of ​​one pixel of sensor 4B. erf is the standard error function.

[0287] After the second glare contrast is corrected, the comparison unit 102 compares the corrected contrast, which is the second glare contrast after correction, with the uncorrected contrast, which is the first glare contrast (step S4 ).

[0288] Correcting the second glare contrast according to formula (1) is equivalent to: adjusting the second measurement condition afterward compared with the first measurement condition so that the size of the luminous area on the anti-glare layer 9 that helps the diffraction-limited light spot of the outgoing light L to be imaged on the two-dimensional image sensors 4A and 4B becomes the same.

[0289] The size of the luminous area on the anti-glare layer 9 that helps the diffraction-limited spot of the emitted light L to be imaged on the two-dimensional image sensors 4A and 4B is determined based on the size of the diffraction-limited spot and the magnification of the imaging lenses 31A and 31B calculated from the focal length of the imaging lenses 31A and 31B and the distance from the anti-glare layer 9 to the imaging lenses 31A and 31B, as shown in the following formulas (7) and (8).

[0290] [Formula 17]

[0291]

[0292] In formula (7), S1 is the size of the luminous area on the anti-glare layer 9 that helps the diffraction-limited light spot of the emitted light to be imaged on the first two-dimensional image sensor 4A as the first measurement condition. R1 is the size of the diffraction-limited light spot on the first two-dimensional image sensor 4A, that is, the size of the Airy disk. m1 is the magnification of the first imaging lens 31A as the first measurement condition. F1 is the image-side effective F value of the first imaging lens 31A as the first measurement condition. d1 is the distance from the anti-glare layer 9 to the first imaging lens 31A as the first measurement condition. f1 is the effective focal length of the first imaging lens 31A as the first measurement condition. F1' is the object-side effective F value of the first imaging lens 31A as the first measurement condition.

[0293] [Formula 18]

[0294]

[0295] In formula (8), S2 is the size of the luminous area on the anti-glare layer 9 that helps the diffraction-limited light spot of the outgoing light to be imaged on the second two-dimensional image sensor 4B as the second measurement condition. R2 is the size of the diffraction-limited light spot on the second two-dimensional image sensor 4B. m2 is the magnification of the second camera lens 31B as the second measurement condition. F2 is the image-side effective F value of the second camera lens 31B as the second measurement condition. d2 is the distance from the anti-glare layer 9 to the second camera lens 31B as the second measurement condition. f2 is the effective focal length of the second camera lens 31B as the second measurement condition. F2' is the object-side effective F value of the second imaging lens 31B as the second measurement condition.

[0296] Here, equation (1) is equivalent to the second glare contrast S P 2 multiplied by (S2 / S1). Glare contrast S P It is proportional to the reciprocal 1 / S of the size S of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the outgoing light to be imaged on the two-dimensional image sensor. Therefore, equation (1) is equivalent to: P 2 times S P 1 / S P 2, that is, the second glare contrast S after correction on the left side is P 2a and 1st glare contrast S P 1 is consistent. The consistency of glare contrast means that S, which is proportional to the inverse of glare contrast, is also consistent. Therefore, according to the second glare contrast S of formula (1), P The correction of 2 is equivalent to making the following equation (6) valid between the first measurement condition and the second measurement condition.

[0297] S1=S2 (6)

[0298] Here, if Figure 3 As shown in FIG. 1 , the outgoing light L from one point on the anti-glare layer 9 is imaged on the two-dimensional sensor array surface 41 of the two-dimensional image sensors 4A and 4B according to the PSF (point image intensity distribution function). More specifically, the outgoing light L from one point on the anti-glare layer 9 is imaged as a diffraction-limited spot PS, i.e., a point image, spanning a plurality of pixels 42. In addition, in order to facilitate the explanation of the diffusion of the diffraction-limited spot PS according to the PSF, Figure 3 The two-dimensional image sensors 4A and 4B are compared Figure 2 Further enlarged image.

[0299] Thus, the diffraction-limited light spot PS centered on one pixel 42 is received not only by the pixel 42 but also by other adjacent pixels 42. Therefore, it can be considered that the emitted light L from the plurality of light-emitting points P on the anti-glare layer 9 contributes to the formation of an image of the diffraction-limited light spot PS on one pixel 42.

[0300] Furthermore, the luminous area on the anti-glare layer 9 that helps the diffraction-limited light spot PS of the outgoing light L to be imaged on the two-dimensional sensor array surface 41 can be considered as a collection of multiple luminous points P. Figure 3 As shown, the size of the light-emitting area can be considered to be the size S1 and S2 of the image projected by the diffraction-limited spot PS on the two-dimensional image sensor 4A and 4B side through the imaging lenses 31A and 31B onto the anti-glare layer 9. Figure 3 The projection image of the diffraction-limited light spot PS on the anti-glare layer 9 is represented as the projection image of PSF. Figure 3 In the example shown, the projection image of the diffraction-limited spot PS on the anti-glare layer 9 is larger than the diffraction-limited spot PS. The projection image is larger than the diffraction-limited spot PS because it is related to the magnification of the optical system 3.

[0301] If the sizes S1 and S2 of the light emitting areas on the antiglare layer 9 that contribute to the formation of the diffraction-limited spot PS are the same, the compatibility of the glare contrasts based on the emitted light L captured under different measurement conditions can be ensured. The reason is as follows.

[0302] When the outgoing light L from each light emitting point P on the anti-glare layer 9 incident on the pixel 42 is incoherent or has reduced coherence to the extent that it is considered incoherent, the outgoing light L from each light emitting point P on the anti-glare layer 9 hardly interferes on the pixel 42. That is, a simple overlap of light wavefronts occurs on the pixel 42. In addition, the element glare patterns generated from each light emitting point P are different patterns that are independent of each other due to the random structure of the anti-glare layer 9.

[0303] As a result, a diffraction-limited light spot group in which the glare is averaged is formed according to the number of light-emitting points P on the anti-glare layer 9 corresponding to the pixel 42. The degree of the averaged glare depends on the number of light-emitting points P on the anti-glare layer 9 corresponding to the pixel 42, that is, the size S1 and S2 of the light-emitting area on the anti-glare layer 9.

[0304] Therefore, if the sizes S1 and S2 of the light-emitting regions on the anti-glare layer 9 are made equal, even if the measurement conditions are different, a glare contrast that can be compared based on the same standard with the same degree of glare averaging can be obtained.

[0305] For the above reasons, the compatibility of the glare contrast can be ensured, and therefore the correction unit 101 corrects the second glare contrast according to the equation (1) so that S2 and S1 are consistent and equivalent.

[0306] According to this configuration, by correcting the second glare contrast as a comparison object measured under the second measurement condition different from the first measurement condition according to equation (1), it is possible to ensure the interchangeability between the first glare contrast as a comparison reference measured under the first measurement condition and the corrected second glare contrast. Thus, a plurality of glare contrasts under different measurement conditions can be appropriately compared.

[0307] Furthermore, the relationship established between the first measurement condition and the second measurement condition may be such a relationship that the structural conditions of the electronic display 8, the anti-glare layer 9, and the optical measuring devices 1A and 1B having the imaging lenses 31A and 31B and the two-dimensional image sensors 4A and 4B are the same, and the measurement conditions using the optical measuring devices 1A and 1B, including the distance from the anti-glare layer 9 to the imaging lenses 31A and 31B, are different.

[0308] Alternatively, the relationship between the first measurement condition and the second measurement condition may be the following relationship: the structural conditions of the electronic display 8 and the anti-glare layer 9 are the same, and the structural conditions of the optical measuring devices 1A, 1B including the imaging lenses 31A, 31B and the two-dimensional image sensors 4A, 4B are different from the measurement conditions using the optical measuring devices 1A, 1B including the distance from the anti-glare layer 9 to the imaging lenses 31A, 31B.

[0309] Alternatively, the relationship between the first measurement condition and the second measurement condition may be as follows: the structural conditions of the electronic display 8 and the optical measuring devices 1A, 1B having the imaging lenses 31A, 31B and the two-dimensional image sensors 4A, 4B are the same, and the structural conditions of the anti-glare layer 9 are different from the measurement conditions using the optical measuring devices 1A, 1B including the distance from the anti-glare layer 9 to the imaging lenses 31A, 31B.

[0310] Next, an application example of the glare contrast comparison method will be described.

[0311] [1. Method for manufacturing electronic display]

[0312] The glare contrast comparison method of the present embodiment and each modified example described later can also be used to check whether the inspection object, that is, the electronic display, which is the inspection object of the product, meets the qualified standard of the glare contrast in the manufacturing process of the electronic display. In this case, as the first glare contrast, the glare contrast of the qualified standard is applied. In addition, as the second glare contrast, the glare contrast of the inspection object is applied. For example, the comparison unit 102 of the comparison device 100 compares the glare contrast of the inspection object corrected by the correction unit 101 of the comparison device 100 with the glare contrast of the qualified standard. In the case where the result of the comparison is that the difference between the corrected glare contrast of the inspection object and the glare contrast of the qualified standard is small, the comparison unit 102 can also output the judgment result that the electronic display as the inspection object is a qualified product. On the other hand, in the case where the difference between the corrected glare contrast of the inspection object and the glare contrast of the qualified standard is large, the comparison unit 102 can also output the judgment result that the electronic display as the inspection object is a defective product. The judgment on whether the difference between the corrected glare contrast of the inspection object and the glare contrast of the qualified standard is small can also be performed according to a predetermined judgment standard such as a threshold value of the glare contrast difference. In addition, the glare contrast of the inspection object can be used as the first glare contrast, and the glare contrast of the qualified standard can be used as the second glare contrast.

[0313] The electronic display as the inspection object may also be an electronic display without an anti-glare layer 9 on the surface, that is, an electronic display body. In this case, in the inspection of whether the qualified benchmark is met, an anti-glare layer 9 for inspection is configured on the surface of the electronic display in order to measure the glare contrast. The anti-glare layer 9 for inspection is an anti-glare layer 9 with predetermined characteristics. For example, the anti-glare layer 9 may also be an anti-glare layer 9 with a predetermined structure and size. In this case, the conditions of the anti-glare layer 9 are the same between multiple electronic displays as the inspection object. Therefore, the difference in optical properties between multiple electronic displays as the inspection object is manifested as a difference in glare contrast. That is, in the case where a difference in glare contrast occurs between multiple electronic displays as the inspection object, it can be considered that the difference is not caused by the difference in optical properties of the anti-glare layer 9. In this way, by inspecting whether the electronic display as the inspection object meets the qualified benchmark under the same inspection conditions of the anti-glare layer 9, it is possible to properly perform the inspection. For example, it is possible to suppress the following situation: although the electronic display is originally a qualified product, it is misjudged as a defective product due to the influence of the difference in optical properties of the anti-glare layer 9. The electronic display manufactured through the glare contrast comparison process can exhibit good optical characteristics that meet the acceptable standards regarding the glare contrast.

[0314] Furthermore, the electronic display to be inspected may be an electronic display having the anti-glare layer 9 disposed on the surface, that is, an electronic display device.

[0315] [2. Method for producing anti-glare layer]

[0316] In addition, the glare contrast comparison method of the present embodiment and each modified example described later can also be used to check whether the anti-glare layer 9 as the inspection object that becomes the product meets the qualified standard of glare contrast in the manufacturing process of the anti-glare layer 9. In this case, as the first glare contrast, the glare contrast of the qualified standard is applied. In addition, as the second glare contrast, the glare contrast of the electronic display having the anti-glare layer 9 as the inspection object configured on the surface is applied. For example, the comparison unit 102 compares the glare contrast of the electronic display having the anti-glare layer 9 as the inspection object corrected by the correction unit 101 on the surface with the glare contrast of the qualified standard. Alternatively, when the comparison result is that the difference between the corrected glare contrast of the electronic display having the anti-glare layer 9 as the inspection object configured on the surface and the glare contrast of the qualified standard is small, the comparison unit 102 outputs the judgment result that the anti-glare layer 9 as the inspection object is a qualified product. On the other hand, when it is judged that the difference between the corrected glare contrast of the electronic display having the anti-glare layer 9 as the inspection object on the surface and the glare contrast of the qualified standard is large, the comparison unit 102 outputs the judgment result that the anti-glare layer 9 as the inspection object is a defective product. The judgment on whether the difference between the corrected glare contrast of the electronic display having the anti-glare layer 9 as the inspection object on the surface and the glare contrast of the qualified standard is small can be performed according to a judgment standard such as a predetermined threshold value of the glare contrast difference. In addition, as the first glare contrast, the glare contrast of the electronic display having the anti-glare layer 9 as the inspection object on the surface can also be applied. In addition, as the second glare contrast, the glare contrast of the qualified standard can also be applied.

[0317] In the inspection of whether the qualified standard is met, in order to measure the glare contrast, the anti-glare layer 9 as the inspection object is arranged on the surface of the electronic display for inspection. The electronic display for inspection is an electronic display with predetermined characteristics. For example, the electronic display for inspection can also be an electronic display with a predetermined structure and size. The electronic display for inspection can also be shared between multiple anti-glare layers 9 as inspection objects, that is, repeatedly used.

[0318] In this way, when an electronic display having predetermined characteristics is used as an electronic display for inspection, the conditions of the electronic display are the same between multiple anti-glare layers 9 as inspection objects. Therefore, the difference in optical characteristics between multiple anti-glare layers 9 as inspection objects is manifested as a difference in glare contrast. That is, in the case where a difference in glare contrast occurs between multiple anti-glare layers 9 as inspection objects, it can be considered that the difference is not caused by the difference in optical characteristics of the electronic display. In this way, by checking whether the anti-glare layer 9 as the inspection object meets the qualified standard under the same inspection conditions as the conditions of the electronic display, the inspection can be properly performed. For example, the following situation can be suppressed: although the anti-glare layer 9 is originally a qualified product, it is misjudged as a defective product due to the influence of the difference in optical characteristics of the electronic display. The anti-glare layer 9 manufactured through the glare contrast comparison process can exert good optical characteristics that meet the qualified standard regarding the glare contrast.

[0319] The specific form of the anti-glare layer 9 as the inspection object is not particularly limited, for example, it can be the form of A (a single layer or a laminated body with an anti-glare function is provided on a substrate) as described above. In the case where the anti-glare layer is in the form of a laminated body, the anti-glare layer 9 as the inspection object is formed by providing a single layer or a plurality of layers with an anti-glare function on a substrate. As the substrate, for example, a sheet-like translucent substrate can be used. The material of the translucent substrate is not particularly limited, for example, it can be a resin such as plastic, glass. The resin can be any of a thermoplastic resin and a thermosetting resin.

[0320] The layer with anti-glare function can be formed by applying an anti-glare layer composition containing a resin on a translucent substrate and curing the applied resin. The anti-glare layer composition can be, for example, a composition obtained by mixing at least one oligomer or polymer with at least one curable resin precursor using an appropriate solvent. The oligomer and polymer can be curable or non-curable. The anti-glare layer composition can further add particles. The above-mentioned oligomer or polymer can be, for example, a thermoplastic resin. As a curable resin precursor, a curable oligomer, and a curable polymer, various curable compounds that can be cured or cross-linked by heat, or ionizing radiation such as ultraviolet rays and electron beams to form a cured resin or a cross-linked resin can be used. The particles can be any of inorganic particles and organic particles. The particles can be, for example, plastic beads. In addition, the composition can contain various additives such as a photocuring initiator, a leveling agent, a special wavelength absorber, a refractive index adjuster, an antistatic agent, a dye, a pigment, and an antioxidant.

[0321] The method for coating the anti-glare layer composition on the substrate is not particularly limited, and for example, it can be carried out by known methods such as spin coating, dipping, spraying, die coating, rod coating, roller coating, meniscus coating, flexographic printing, screen printing, and droplet coating.

[0322] After the anti-glare layer composition is applied by any of the above methods, the formed coating film is transported to a heated area to dry it, and the coating film is dried by various known methods to evaporate the solvent. Here, the distribution state of the organic particles and the inorganic particles can be adjusted by selecting the relative evaporation rate of the solvent, the solid content concentration, the coating liquid temperature, the drying temperature, the wind speed of the drying wind, the drying time, the solvent atmosphere concentration in the drying area, etc.

[0323] The curing of the anti-glare layer composition can be carried out by heating or irradiation with active energy rays. As the irradiation method of ionizing radiation, for example, a method using a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, a metal halide lamp, etc. can be listed. In addition, as the wavelength of ultraviolet rays, a wavelength region of 190 to 380 nm can be used. As a specific example of an electron beam source, various electron beam accelerators such as Cockcroft-Walton type, Van de Graaff type, resonance transformer type, insulating core transformer type, or linear type, Dynamitron type, and high frequency type can be listed.

[0324] The anti-glare layer 9 to be inspected may have a concavo-convex shape on the surface. The method for forming the concavo-convex shape on the surface of the anti-glare layer 9 may be any of the following methods: (1) a method of adding (i.e., mixing and dispersing) microparticles to the anti-glare layer composition described above; (2) a method of forming a phase separation structure by spinodal decomposition accompanied by evaporation of the solvent in the anti-glare layer composition without adding microparticles; (3) a shaping treatment for imparting a concavo-convex shape; (4) embossing and a combination of (1) to (4).

[0325] [3. Method for selecting an anti-glare layer and products equipped with an anti-glare layer]

[0326] In addition, the glare contrast comparison method of the present embodiment and each modified example described later can also be applied to the method for selecting the anti-glare layer 9 and the product equipped with the anti-glare layer 9 selected by the selection method. As the anti-glare layer 9 used in the method for selecting the anti-glare layer 9, various forms of anti-glare layers 9 manufactured by the method for manufacturing the laminate described in [2. Method for manufacturing the anti-glare layer] and other manufacturing methods can be applied.

[0327] In the method for selecting the anti-glare layer 9, a first measured contrast obtained by measuring the glare contrast of an electronic display having the first anti-glare layer 9 disposed on its surface using a first optical measuring device is used as a glare contrast serving as a comparison reference. Figure 2 The first optical measuring device 1A shown in FIG. 1 is used as the glare contrast to be compared in the method for selecting the anti-glare layer 9. In addition, a second measured contrast is used as the glare contrast to be compared, which is obtained by measuring the glare contrast of an electronic display having the second anti-glare layer 9 disposed on the surface using a second optical measuring device. The electronic display body used in the measurement of the second measured contrast is the same as the electronic display body used in the measurement of the first measured contrast. The second anti-glare layer 9 is an anti-glare layer different from the first anti-glare layer 9. As the second optical measuring device, for example, Figure 2 The second optical measuring device 1B is shown.

[0328] That is, in the method of selecting the anti-glare layer 9 , the first measured contrast and the second measured contrast are compared using the above-mentioned glare contrast comparison method accompanied by correction of one of the two contrasts.

[0329] Then, based on the comparison result of the first measured contrast and the second measured contrast, the anti-glare layer of one of the first anti-glare layer 9 and the second anti-glare layer 9 is selected. Specifically, the anti-glare layer of the first anti-glare layer 9 and the second anti-glare layer 9 with a good corresponding measured contrast is selected. More specifically, the anti-glare layer of the first anti-glare layer 9 and the second anti-glare layer 9 with a lower corresponding measured contrast is selected. Such selection of the anti-glare layer 9 can be performed on the basis that both the first anti-glare layer 9 and the second anti-glare layer 9 are judged to be qualified products in the above-mentioned [2. Method for manufacturing anti-glare layer].

[0330] The anti-glare layer 9 selected by this method can be mounted on an electronic display as a product, a polarizing plate or a display element constituting the electronic display to exert good optical properties. In addition, the specific form of the display element varies according to the type of the electronic display. For example, when the electronic display is an LCD (liquid crystal display), the display element is a liquid crystal display panel. LCD, for example, is composed of a liquid crystal display panel, a surface member and a polarizing plate. In addition, when the electronic display is an OLED (organic light emitting diode), the display element is a display element of OLED. OLED, for example, is composed of a display element, a surface member and a polarizing plate. OLED sometimes does not have a polarizing plate. In addition, the display element may also be a display element of a mini LED or a micro LED as another example of an electronic display. Mini LED and micro LED, for example, can be composed of a display element, a surface member and a polarizing plate. Mini LED and micro LED sometimes do not have a polarizing plate. The above-mentioned display element is included in the electronic display 8, and the display element includes pixels, a pixel matrix 81 or a black matrix 82.

[0331] In addition, the anti-glare layer 9 selected by this method can be effectively used in all electronic displays. For example, in recent years, large-scale HD (high definition), FHD (full high definition) 4K, 8K and other high-definition images are continuously promoted, such as 30 inches, then 40, 50 inches or more TVs, 15 inches, then 20, 30 inches or more monitors, 10 inches or more, then 15 inches or more, 17 inches or more laptops, etc., with a pixel density (number of pixels per inch) of 110dpi to 350dpi. Pixel density is sometimes also referred to as ppi. The pixel density in the present disclosure is the physical pixel density of the display element in the display. If the resolution can be changed in various display display elements, in this case, it is the maximum pixel density that can be achieved.

[0332] For example, when the glare contrast value when the anti-glare layer 9 is installed on a 138dpi laptop computer is preferably 0.05, more preferably 0.03 or less, it can be considered that the glare prevention property is good. In addition, compared with the above-mentioned electronic displays that are promoting large-area displays, in-vehicle displays, flat-panel displays, smartphones, etc. that have further developed high-definition in recent years have more dense pixel densities of 150dpi to 900dpi in order to achieve the purpose of being able to display more information even with a small screen size. For example, if the glare contrast value when installed on a 423dpi smartphone is preferably 0.07 or less, more preferably 0.05 or less, and most preferably 0.04 or less, it is considered that the glare prevention property is good. And, if Fig.11As shown, the glare contrast value is a value when the display 8000 of each pixel density (138dpi, 423dpi) is equipped with an anti-glare layer 90 and measured using a measuring instrument 1000 under measurement conditions corresponding to each pixel density. The measuring instrument 1000 is configured to accommodate an aperture 1002, a lens 1003, and a CCD 1004 inside a housing 1001. In addition, a single-focus 60mm camera lens is used for the lens 1003, and a cooled CCD is used for the CCD 1004 in order to minimize measurement errors. The specific measurement conditions using the measuring instrument 1000 are as follows.

[0333] [Measurement conditions for 13.3 inches, 138 dpi]

[0334] (1) Display conditions: Full screen

[0335] (2) Sub-pixel pitch P when only green light G is lit at full output F :About 185μm

[0336] (3) Pixel pitch P of the image sensor of the measuring instrument L :5.5μm

[0337] (4) Image-side effective F# of the imaging lens image :36.4

[0338] (5) Image sensor pixel area used to calculate contrast value: 128 × 128

[0339] (6) Measurement distance L, which is the distance from the principal point on the object side of the imaging lens to the display matrix surface: 500 mm

[0340] (7) Optical magnification m: 0.136

[0341] (8) Use P F *m / P L Defined ISR (Image Sampling Ratio): 4.59

[0342] (9) Angle between the display surface and the optical axis of the measuring instrument: 90°

[0343] (10) Since the pixel shape is visible, a step of removing the pixel shape is performed.

[0344] [Measurement conditions for 5.2 inches and 423 dpi]

[0345] (1) Display conditions: Full screen

[0346] (2) PF: about 60 μm

[0347] (3)P L :5.5μm

[0348] (4) F# image :36.4

[0349] (5) Image sensor pixel area used to calculate contrast value: 128 × 128

[0350] (6) L: 500mm

[0351] (7) m: 0.136

[0352] (8)ISR:1.49

[0353] (9) Angle between the display surface and the optical axis of the measuring instrument: 90°

[0354] (10) Since the pixel shape cannot be seen, the step of removing the pixel shape is not performed.

[0355] At 138 dpi, a process of removing the image components of the pixel shape of the display element of the display is implemented. This process is implemented by performing Fourier transform on the captured image, removing the regular periodic components generated by the image components of the pixel shape of the display from the Fourier transformed image, and then performing inverse Fourier transform.

[0356] According to the present method, glare contrast values ​​measured by different optical measuring devices can be compared with each other without re-measurement, and the most suitable anti-glare layer for a polarizing plate or display element of an electronic display can be easily selected.

[0357] [4. Method for selecting display components and products equipped with display components]

[0358] In addition, the glare contrast comparison method of this embodiment and each modified example described later can also be applied to a method for selecting a display element and a product equipped with a display element selected by the selection method. The specific form of the display element is not particularly limited, and for example, it can be a liquid crystal display panel of the above-mentioned LCD, an OLED display element, a mini LED display element, or a micro LED display element.

[0359] In the method for selecting a display element, the glare contrast used as a comparison reference is the third measured contrast measured by the third optical measuring device in a state where the third anti-glare layer 9 is arranged on the surface of the first display element, that is, in a state of an electronic display. As the third optical measuring device, for example, Figure 2The first optical measuring device 1A shown in the figure. In addition, in the method for selecting a display element, a fourth measurement contrast measured by a fourth optical measuring device in a state where a third anti-glare layer 9 is arranged on the surface of the second display element is applied as the glare contrast to be compared. The second display element is a display element different from the first display element. The third anti-glare layer 9 used in the measurement of the fourth measurement contrast is an anti-glare layer having the same optical properties as the anti-glare layer 9 used in the measurement of the third measurement contrast. The fourth optical measuring device is a device different from the third optical measuring device. As the fourth optical measuring device, for example, Figure 2 The second optical measuring device 1B is shown.

[0360] That is, in the method of selecting a display element, the third measured contrast and the fourth measured contrast are compared using the above-mentioned glare contrast comparison method accompanied by correction of one of the two contrasts.

[0361] Then, based on the comparison result of the third measured contrast and the fourth measured contrast, one of the first display element and the second display element is selected. Specifically, the display element with good corresponding measured contrast is selected from the first display element and the second display element. The display element selected by this method can be mounted on an electronic display to exert good optical properties.

[0362] As described above, according to the present embodiment, by correcting the second glare contrast based on the ratio between the first measurement condition and the second measurement condition, the first glare contrast and the second glare contrast having different measurement conditions can be appropriately compared.

[0363] An embodiment is described by several specific examples, but the above specific examples are not intended to limit the one embodiment. The above one embodiment can be implemented in other specific examples, and various structures can be omitted, replaced, changed or further added within the scope of the gist.

[0364] Hereinafter, the above-mentioned embodiment will be further described by describing other specific examples with reference to the accompanying drawings. In the following description and the accompanying drawings used in the following description, for parts that can be constructed in the same manner as the above-mentioned specific examples, the same reference numerals as those used for corresponding parts in the above-mentioned specific examples are used, and repeated descriptions are omitted.

[0365] (First Modification)

[0366] Figure 4 FIG. 4 is a flowchart showing a method for comparing glare contrast according to a first variant of the present embodiment. Figure 1 In the example of correcting the second glare contrast according to equation (1), Figure 4 In the example shown, the second glare contrast is corrected according to the following equation (4) (step S3A).

[0367] S P 2a=S P 2×(F2 / F1)×(m1 / m2)×(M2 / M1) 0.5 (4)

[0368] Here, between m1, d1, and f1, the relationship m1=f1 / d1 holds. Similarly, between m2, d2, and f2, the relationship m2=f2 / d2 holds. Therefore, if equation (4) is deformed, the same relationship as equation (1) can be obtained. That is, the correction of the second glare contrast according to equation (4) is equivalent to making S1=S2 hold, just like the correction according to equation (1).

[0369] Therefore, according to Figure 4 The example shown, with Figure 1 The same is true for the case where the first glare contrast and the second glare contrast having different measurement conditions can be appropriately compared.

[0370] (Second Modification)

[0371] Figure 5 FIG. 4 is a flowchart showing a method for comparing glare contrast according to a second variant of the present embodiment. Figure 5 In the example shown, the second glare contrast is corrected according to the following equation (5) (step S3B).

[0372] S P 2a=S P 2×(F2' / F1')×(M2 / M1) 0.5 (5)

[0373] Here, between F1' and F1, the relationship F1'=F1 / m1 holds. Between F2' and F2, the relationship F2'=F2 / m2 holds. Therefore, if formula (5) is deformed, the same relationship as formula (4) can be obtained. That is, the correction of the second glare contrast according to formula (5) is equivalent to making S1=S2 hold, just like the correction according to formula (4).

[0374] Therefore, according to Figure 5 The example shown, with Figure 4 The same is true for the case where the first glare contrast and the second glare contrast having different measurement conditions can be appropriately compared.

[0375] (Third Modification)

[0376] Fig. 6A : is a flowchart showing a method for comparing glare contrasts in the third variant of the present embodiment. Previously, an example was described in which the second glare contrast is corrected in such a way that S1=S2 holds, thereby obtaining a second glare contrast that is interchangeable with the first glare contrast. Fig. 6A In the example shown, the error in flare contrast due to the influence of aberration is taken into consideration, and a second flare contrast that can be compared with the first flare contrast with higher accuracy is obtained compared with the case where S1 = S2 holds.

[0377] Specifically, the correction unit 101 obtains the first glare contrast and information indicating the first measurement condition (step S1), and obtains the second glare contrast and information indicating the second measurement condition (step S2), and then determines whether the relationship S1=S2 in the above-mentioned formula (6) holds (step S31).

[0378] When S1=S2 holds true (step S31: Yes), the correction unit 101 performs correction calculation on the image of the outgoing light captured under the second measurement condition so that the MTF (Modulation Transfer Function) calculated based on the image is consistent with the image of the outgoing light captured under the first measurement condition (step S32). On the other hand, when S1=S2 does not hold true (step S31: No), the process ends.

[0379] Figure 7 It is shown Fig. 6A The correction calculation of the image of the emitted light captured under the second measurement condition may be performed, for example, according to Figure 7 The flowchart is carried out.

[0380] Specifically, the correction unit 101 first creates an edge profile of the image of the outgoing light captured under the second measurement condition (step S321). The edge profile is information indicating changes in pixel values ​​of the edge portion of the image of the outgoing light captured under the second measurement condition. The edge profile can be created by applying the technology disclosed in JP2020-25224A, for example.

[0381] After the edge profile is created, the correction unit 101 calculates a line spread function by differentiating the edge profile (step S322 ).

[0382] After calculating the line spread function, the correction unit 101 calculates the second MTF by performing Fourier transform on the calculated line spread function (step S323 ).

[0383] After calculating the second MTF, the correction unit 101 compares the calculated second MTF with the first MTF calculated based on the image of the outgoing light captured under the first measurement condition (step S324 ).

[0384] Through the comparison, the correction unit 101 determines whether the second MTF is consistent with the first MTF (step S325 ).

[0385] When the second MTF is consistent with the first MTF (step S325: Yes), the correction unit 101 ends the correction operation. Fig. 6A As shown, the second glare contrast after the correction is acquired based on the image of the output light after the correction operation (step S33).

[0386] On the other hand, when the second MTF is inconsistent with the first MTF (step S325: No), the correction unit 101 changes the resolution of the image of the outgoing light captured under the second measurement condition by changing the coefficient of the enhancement filter that adjusts the resolution of the image (step S326). The change of the resolution using the enhancement filter can be performed by applying the technology disclosed in JP2020-25224A, for example. Then, the processing after step S321 is repeated for the image after the resolution is changed. In addition, Figure 7 The example shown is only an example of the correction operation, and it can also be done by Figure 7 Correction calculations are not performed by other methods.

[0387] according to Fig. 6A The example shown can more appropriately compare the first glare contrast and the second glare contrast having different measurement conditions.

[0388] In addition, if Figure 6B As shown, the correction unit 101 may also implement step S34 between step S32 and step S33. Step S34 is a process of making the average radiation brightness of the image obtained by performing a correction operation on the image of the outgoing light captured under the second measurement condition consistent with the average radiation brightness of the image of the outgoing light captured under the first measurement condition.

[0389] Specifically, in step S34, the correction unit 101 corrects the image obtained by the correction operation. Figure 6C As shown in FIG. 1 , the image is divided into a plurality of regions (X, Y) arranged in a matrix in the X direction and the Y direction. Then, the correction unit 101 multiplies the radiance data of all pixels in each divided region (X, Y) by the following parameter:

[0390] [Formula 19]

[0391] .

[0392] in,

[0393] [Formula 20]

[0394]

[0395] I is the average radiance of the image of the outgoing light captured under the first measurement condition obtained in advance. XY It is the local average brightness in the area (X, Y). Through step S34, the average radiation brightness of the entire area (X, Y) of the image after the correction operation can be made consistent with the average radiation brightness of the image of the outgoing light captured under the first measurement condition. In step S33 continuous with step S34, the correction unit 101 obtains the corrected second glare contrast based on the image after the correction operation that is consistent with the image of the outgoing light captured under the first measurement condition.

[0396] In addition, if Fig.6D As shown, the correction unit 101 may also implement step S35 between step S32 and step S34. Step S35 is a process of removing the image components of the pixel shape generated by the pixels of the display element of the electronic display 8 from the image obtained by the correction operation of step S32. Step S35 can be implemented, for example, by performing Fourier transform on the image obtained by the correction operation, removing the regular periodic components generated by the pixels of the electronic display 8 from the Fourier transformed image, and then performing inverse Fourier transform. Thus, in step S34, which is continuous with step S35, a process of making the average radiation brightness consistent with the image of the outgoing light captured under the first measurement condition is implemented for the image after the correction operation in which the image components of the pixel shape generated by the pixels of the display element of the electronic display 8 are removed.

[0397] (Fourth Modification)

[0398] Figure 8 FIG. 4 is a flowchart showing a method for comparing glare contrast according to the fourth variant of the present embodiment. Previously, the glare contrast used as a comparison reference was the glare contrast actually measured under actual measurement conditions. Figure 8 In the example shown, the glare contrast serving as a comparison reference is set to be the glare contrast measured virtually under the virtual measurement conditions.

[0399] Specifically, first, Figure 8 As shown, the correction unit 101 obtains: the third glare contrast as a comparison benchmark, which is hypothetically measured under hypothetical measurement conditions using a hypothetical camera lens that images the outgoing light from the anti-glare layer 9, and a hypothetical two-dimensional image sensor that images the outgoing light; and information representing the hypothetical measurement conditions (step S1A).

[0400] In addition, the correction unit 101 obtains: the 4th glare contrast as a comparison object, which is measured under actual measurement conditions using an actual camera lens that images the outgoing light from the anti-glare layer 9, and an actual two-dimensional image sensor that images the outgoing light; and information representing the actual measurement conditions (step S2A).

[0401] Next, the calibration unit 101 determines whether the following equation (9) holds true between the assumed measurement conditions and the actual measurement conditions (step S301 ).

[0402] S3≠S4 (9)

[0403] In formula (9), S3 is the size of the luminous area on the anti-glare layer 9 that helps to image the diffraction-limited spot of the outgoing light from the anti-glare layer 9 on the two-dimensional image sensor as a hypothetical measurement condition, and satisfies the following formula (11). S4 is the size of the luminous area on the anti-glare layer 9 that helps to image the diffraction-limited spot of the outgoing light from the anti-glare layer 9 on the two-dimensional image sensor as an actual measurement condition, and satisfies the following formula (12).

[0404] [Formula 21]

[0405]

[0406] In formula (11), R3 is the size of the diffraction-limited spot on the two-dimensional image sensor. m3 is the magnification of the imaginary camera lens as an imaginary measurement condition. F3 is the image-side effective F value of the imaginary camera lens as an imaginary measurement condition. d3 is the distance from the anti-glare layer 9 to the imaginary camera lens as an imaginary measurement condition. f3 is the effective focal length of the imaginary camera lens as an imaginary measurement condition. F3' is the object-side effective F value of the imaginary camera lens as an imaginary measurement condition.

[0407] [Formula 22]

[0408]

[0409] In formula (12), R4 is the size of the diffraction-limited spot on the two-dimensional image sensor. m4 is the magnification of the actual imaging lens as the actual measurement condition. F4 is the image-side effective F value of the actual imaging lens as the actual measurement condition. d4 is the distance from the anti-glare layer 9 to the actual imaging lens as the actual measurement condition. f4 is the effective focal length of the actual imaging lens as the actual measurement condition. F4' is the object-side effective F value of the actual imaging lens as the actual measurement condition.

[0410] When the equation (9) holds true (step S301 : Yes), the correction unit 101 corrects the fourth glare contrast according to the following equation (10) (step S302 ).

[0411] S P 4a=S P 4×(S4 / S3) (10)

[0412] In formula (10), S P 4a is the 4th glare contrast after correction. P 4 is the 4th flare contrast before correction.

[0413] On the other hand, when equation (9) does not hold (step S301 : No), the correction unit 101 ends the process.

[0414] After the fourth glare contrast is corrected, the comparison unit 102 compares the corrected fourth glare contrast with the third glare contrast (step S4A).

[0415] according to Figure 8 In the example shown, even when the glare contrast as the comparison reference is virtually set, the glare contrast as the comparison object can be appropriately compared. By virtually setting the comparison reference, the degree of freedom related to the comparison reference can be increased.

[0416] (Fifth Modification)

[0417] Fig. 9 FIG. 5 is a flowchart showing a method for comparing glare contrast according to a fifth variant of the present embodiment. Fig. 9 As shown, after the fourth glare contrast is corrected according to the above-mentioned equation (10), the fourth glare contrast may be further corrected according to the following equation (13) (step S303).

[0418] S P 4a'=S P 4a×(M4 / M3) 0.5 (13)

[0419] In formula (13), S P 4a' is the fourth glare contrast after correction based on equation (13). M3 is the value shown in equation (14) below. M4 is the value shown in equation (15) below.

[0420] [Formula 23]

[0421]

[0422] In the formula (14), Ac3 is (((4 / π)×F3×λ) / 2) when the wavelength of the light emitted from the antiglare layer is defined as λ. 2 Am3 is a parameter represented by ×π. When the pixel pitch of the two-dimensional image sensor as an assumed measurement condition is defined as p3, p3 is used as 2 represents the parameter. erf is the standard error function.

[0423] [Formula 24]

[0424]

[0425] In equation (15), Ac4 is (((4 / π)×F4×λ) / 2) when the wavelength of the light emitted from the antiglare layer is defined as λ. 2 Am4 is a parameter represented by ×π. When the pixel pitch of the two-dimensional image sensor as an assumed measurement condition is defined as p4, p4 is used as 2 represents the parameter. erf is the standard error function.

[0426] according to Fig. 9 In the example shown, even when the F value of the imaging lens is different between the hypothetical measurement conditions and the actual measurement conditions, the fourth glare contrast can be properly corrected. Therefore, the glare contrast hypothetically measured under the hypothetical measurement conditions and the glare contrast actually measured under the actual measurement conditions can be more properly compared.

[0427] Furthermore, a plurality of modified examples applicable to the above embodiment have been described above, but it is of course possible to appropriately combine the plurality of modified examples and apply them.

Claims

1. A method for correcting glare contrast, wherein: The glare contrast correction method comprises: A step of obtaining a first glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast ratio is measured under the first measurement condition using a first imaging lens for imaging outgoing light from the anti-glare layer and a first two-dimensional image sensor for imaging the outgoing light; A step of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition different from the first measurement condition, wherein the second glare contrast is measured under the second measurement condition using a second imaging lens for imaging the outgoing light from the anti-glare layer and a second two-dimensional image sensor for imaging the outgoing light; and a step of correcting the second glare contrast based on a ratio of the first measurement condition to the second measurement condition for comparison with the first glare contrast, The process of correcting the second glare contrast is performed according to the following formula (1): S P 2a=S P 2× (F2 / F1)× (d2 / d1)× (f1 / f2)× (M2 / M1) 0.5 (1) in, S P 2a: Corrected 2nd glare contrast; S P 2: 2nd glare contrast before correction; F1: image-side effective F value of the first imaging lens as the first measurement condition; F2: image-side effective F value of the second imaging lens as the second measurement condition; d1: the distance from the anti-glare layer to the first imaging lens as the first measurement condition; d2: the distance from the anti-glare layer to the second imaging lens as the second measurement condition; f1: the effective focal length of the first imaging lens as the first measurement condition; f2: the effective focal length of the second imaging lens as the second measurement condition; M1: the value shown in the following formula (2); M2: The value shown in the following formula (3), in, Ac1: When the wavelength of the emitted light is defined as λ, (((4 / π)×F1×λ) / 2) 2 ×π represents the parameter; Am1: When the pixel pitch of the first two-dimensional image sensor as the first measurement condition is defined as p1, p1 2 The parameters represented; erf: standard error function, in, Ac2: When the wavelength of the emitted light is defined as λ, (((4 / π)×F2×λ) / 2) 2 ×π represents the parameter; Am2: When the pixel pitch of the second two-dimensional image sensor as the second measurement condition is defined as p2, p2 2 Represents the parameters.

2. A method for correcting glare contrast, wherein: The glare contrast correction method comprises: A step of obtaining a first glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast ratio is measured under the first measurement condition using a first imaging lens for imaging outgoing light from the anti-glare layer and a first two-dimensional image sensor for imaging the outgoing light; A step of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition different from the first measurement condition, wherein the second glare contrast is measured under the second measurement condition using a second imaging lens for imaging the outgoing light from the anti-glare layer and a second two-dimensional image sensor for imaging the outgoing light; and a step of correcting the second glare contrast based on a ratio of the first measurement condition to the second measurement condition for comparison with the first glare contrast, The process of correcting the second glare contrast is performed according to the following formula (4): S P 2a=S P 2× (F2 / F1)× (m1 / m2)× (M2 / M1) 0.5 (4) in, S P 2a: Corrected 2nd glare contrast; S P 2: 2nd glare contrast before correction; F1: image-side effective F value of the first imaging lens as the first measurement condition; F2: image-side effective F value of the second imaging lens as the second measurement condition; m1: the magnification of the first imaging lens as the first measurement condition; m2: the magnification of the second imaging lens as the second measurement condition; M1: the value shown in the following formula (2); M2: The value shown in the following formula (3), in, Ac1: When the wavelength of the emitted light is defined as λ, (((4 / π)×F1×λ) / 2) 2 ×π represents the parameter; Am1: When the pixel pitch of the first two-dimensional image sensor as the first measurement condition is defined as p1, p1 2 The parameters represented; erf: standard error function, in, Ac2: When the wavelength of the emitted light is defined as λ, (((4 / π)×F2×λ) / 2) 2 ×π represents the parameter; Am2: When the pixel pitch of the second two-dimensional image sensor as the second measurement condition is defined as p2, p2 2 Represents the parameters.

3. A method for correcting glare contrast, wherein: The glare contrast correction method comprises: A step of obtaining a first glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast ratio is measured under the first measurement condition using a first imaging lens for imaging outgoing light from the anti-glare layer and a first two-dimensional image sensor for imaging the outgoing light; A step of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition different from the first measurement condition, wherein the second glare contrast is measured under the second measurement condition using a second imaging lens for imaging the outgoing light from the anti-glare layer and a second two-dimensional image sensor for imaging the outgoing light; and a step of correcting the second glare contrast based on a ratio of the first measurement condition to the second measurement condition for comparison with the first glare contrast, The process of correcting the second glare contrast is performed according to the following formula (5): S P 2a=S P 2× (F2' / F1')× (M2 / M1) 0.5 (5) in, S P 2a: Corrected 2nd glare contrast; S P 2: 2nd glare contrast before correction; F1′: the object-side effective F value of the first imaging lens as the first measurement condition; F2': the object-side effective F value of the second imaging lens as the second measurement condition; M1: the value shown in the following formula (2); M2: The value shown in the following formula (3), in, Ac1: When the wavelength of the emitted light is defined as λ, (((4 / π)×F1×λ) / 2) 2 ×π represents the parameter; Am1: When the pixel pitch of the first two-dimensional image sensor as the first measurement condition is defined as p1, p1 2 The parameters represented; erf: standard error function, in, Ac2: When the wavelength of the emitted light is defined as λ, (((4 / π)×F2×λ) / 2) 2 ×π represents the parameter; Am2: When the pixel pitch of the second two-dimensional image sensor as the second measurement condition is defined as p2, p2 2 Represents the parameters.

4. A method for correcting glare contrast, wherein: The glare contrast correction method comprises: A step of obtaining a first glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating a first measurement condition, wherein the first glare contrast ratio is measured under the first measurement condition using a first imaging lens for imaging outgoing light from the anti-glare layer and a first two-dimensional image sensor for imaging the outgoing light; A step of obtaining a second glare contrast as a comparison object generated by the anti-glare layer and information indicating a second measurement condition different from the first measurement condition, wherein the second glare contrast is measured under the second measurement condition using a second imaging lens for imaging the outgoing light from the anti-glare layer and a second two-dimensional image sensor for imaging the outgoing light; and a step of correcting the second glare contrast in order to compare with the first glare contrast, The process of correcting the second glare contrast comprises: When the following equation (6) holds true between the first measurement condition and the second measurement condition, a correction operation is performed on the image of the outgoing light captured under the second measurement condition in such a manner that the MTF calculated based on the image is consistent with the image of the outgoing light captured under the first measurement condition; and a step of obtaining a corrected second glare contrast from the image obtained by the correction operation, S1=S2 (6) in, S1: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the emitted light to be imaged on the first two-dimensional image sensor as the first measurement condition, and satisfies the following equation (7): S2: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the emitted light to be imaged on the second two-dimensional image sensor as the second measurement condition, and satisfies the following equation (8), in, R1: the size of the diffraction-limited spot on the first two-dimensional image sensor; m1: the magnification of the first imaging lens as the first measurement condition; F1: image-side effective F value of the first imaging lens as the first measurement condition; d1: the distance from the anti-glare layer to the first imaging lens as the first measurement condition; f1: the effective focal length of the first imaging lens as the first measurement condition; F1': the object-side effective F value of the first imaging lens as the first measurement condition, in, R2: the size of the diffraction-limited spot on the second two-dimensional image sensor; m2: the magnification of the second imaging lens as the second measurement condition; F2: image-side effective F value of the second imaging lens as the second measurement condition; d2: the distance from the anti-glare layer to the second imaging lens as the second measurement condition; f2: the effective focal length of the second imaging lens as the second measurement condition; F2': the object-side effective F value of the second imaging lens as the second measurement condition, The step of performing the correction calculation includes a step of adjusting a coefficient of an enhancement filter for adjusting a resolution of an image of the emission light captured under the second measurement condition.

5. The method for correcting glare contrast according to claim 4, wherein: The step of performing the correction operation further comprises: a step of generating an edge profile of an image of the outgoing light captured under the second measurement condition; The step of calculating a line spread function by differentiating the generated edge profile; A step of calculating the MTF by performing Fourier transform on the calculated line spread function; as well as A step of comparing the calculated MTF with the MTF based on the image of the emitted light captured under the first measurement condition.

6. The method for correcting glare contrast according to claim 4 or 5, wherein: The process of correcting the second glare contrast includes a process of making the average radiation brightness of the image obtained by the correction operation consistent with the average radiation brightness of the image of the outgoing light taken under the first measurement condition between the process of performing correction operation on the image of the outgoing light taken under the second measurement condition and the process of obtaining the corrected second glare contrast from the image obtained by the correction operation.

7. The method for correcting glare contrast according to claim 6, wherein: The process of correcting the second glare contrast includes a process of removing image components generated by pixels of the electronic display from the image obtained by the correction operation, between the process of performing correction operation on the image of the outgoing light photographed under the second measurement condition and the process of making the average radiation brightness of the image obtained by the correction operation consistent with the average radiation brightness of the image of the outgoing light photographed under the first measurement condition.

8. A method for correcting glare contrast, wherein: The glare contrast correction method comprises: A step of obtaining a third glare contrast ratio as a comparison reference generated by an anti-glare layer disposed on a surface of an electronic display and information indicating hypothetical measurement conditions, wherein the third glare contrast ratio is hypothetically measured under the hypothetical measurement conditions using a hypothetical imaging lens for imaging outgoing light from the anti-glare layer and a hypothetical two-dimensional image sensor for imaging the outgoing light; A step of obtaining a fourth glare contrast as a comparison object generated by the anti-glare layer and information indicating actual measurement conditions, wherein the fourth glare contrast is actually measured under the actual measurement conditions using an actual imaging lens that images the outgoing light from the anti-glare layer and an actual two-dimensional image sensor that images the outgoing light; and a step of correcting the fourth glare contrast for comparison with the third glare contrast, The step of correcting the fourth glare contrast comprises the following steps: when the following equation (9) holds true between the hypothetical measurement conditions and the actual measurement conditions, correcting the fourth glare contrast according to the following equation (10), S3≠S4 (9) S P 4a=S P 4× (S4 / S3) (10) in, S3: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the outgoing light from the anti-glare layer to be imaged on the two-dimensional image sensor as the hypothetical measurement condition, and satisfies the following equation (11); S4: is the size of the luminous area on the anti-glare layer that helps the diffraction-limited spot of the outgoing light from the anti-glare layer to be imaged on the two-dimensional image sensor as the actual measurement condition, and satisfies the following formula (12); S P 4a: 4th glare contrast after correction; S P 4: 4th glare contrast before correction, in, R3: the size of the diffraction-limited spot on the two-dimensional image sensor; m3: magnification of the imaging lens as the hypothetical measurement condition; F3: the image side effective F value of the imaging lens as the hypothetical measurement condition; d3: the distance from the anti-glare layer to the imaging lens as the hypothetical measurement condition; f3: the effective focal length of the imaging lens as the hypothetical measurement condition; F3': the effective F value of the object side of the imaging lens as the hypothetical measurement condition, in, R4: the size of the diffraction-limited spot on the two-dimensional image sensor; m4: magnification of the imaging lens as the actual measurement condition; F4: the image side effective F value of the imaging lens as the actual measurement condition; d4: the distance from the anti-glare layer to the imaging lens as the actual measurement condition; f4: the effective focal length of the imaging lens as the actual measurement condition; F4′: The object-side effective F value of the imaging lens as the actual measurement condition.

9. The method for correcting glare contrast according to claim 8, wherein: The step of correcting the fourth glare contrast further includes the step of correcting the fourth glare contrast according to the following equation (13): S P 4a'=S P 4a× (M4 / M3) 0.5 (13) in, S P 4a': the fourth glare contrast after correction based on equation (13); M3: the value shown in the following formula (14); M4: The value shown in the following formula (15), in, Ac3: When the wavelength of the emitted light is defined as λ, (((4 / π)×F3×λ) / 2) 2 ×π represents the parameter; Am3: When the pixel pitch of the two-dimensional image sensor as the hypothetical measurement condition is defined as p3, p3 2 The parameters represented; erf: standard error function, in, Ac4: When the wavelength of the emitted light is defined as λ, (((4 / π)×F4×λ) / 2) 2 ×π represents the parameter; Am4: When the pixel pitch of the two-dimensional image sensor as the hypothetical measurement condition is defined as p4, p4 2 Represents the parameters.

10. The method for correcting glare contrast according to any one of claims 1 to 5, 8 and 9, wherein: Between the first measurement condition and the second measurement condition, or between the hypothetical measurement condition and the actual measurement condition, the following relationship holds: the electronic display, the anti-glare layer, and the measuring device including a camera lens and a two-dimensional image sensor are respectively the same in structural conditions, but the measurement conditions using the measuring device, including the distance from the anti-glare layer to the camera lens, are different.

11. The method for correcting glare contrast according to any one of claims 1 to 5, 8 and 9, wherein: Between the first measurement condition and the second measurement condition, or between the hypothetical measurement condition and the actual measurement condition, the following relationship holds: the structural conditions of the electronic display and the anti-glare layer are the same, while the structural conditions of a measuring device including a camera lens and a two-dimensional image sensor and the measurement conditions using the measuring device including the distance from the anti-glare layer to the camera lens are different.

12. The method for correcting glare contrast according to any one of claims 1 to 5, 8 and 9, wherein: Between the first measurement condition and the second measurement condition, or between the hypothetical measurement condition and the actual measurement condition, the structural conditions of the electronic display and the measuring device including the imaging lens and the two-dimensional image sensor are the same, and the structural conditions of the anti-glare layer and the measurement conditions using the measuring device including the distance from the anti-glare layer to the imaging lens are different.

13. A method for comparing glare contrast, wherein: The glare contrast comparison method includes the step of comparing the glare contrast as a comparison object corrected by the glare contrast correction method according to any one of claims 1 to 12 with the glare contrast as a comparison reference.

14. The glare contrast comparison method according to claim 13, wherein: The glare contrast comparison method further includes a step of outputting a comparison result between the corrected glare contrast as a comparison target and the glare contrast as a comparison reference.

15. A method for manufacturing an electronic display, wherein: The method for manufacturing an electronic display comprises a step of inspecting whether the electronic display to be inspected satisfies a qualified standard of glare contrast. The step of inspecting includes the step of comparing as claimed in claim 13, The comparison process is as follows: applying the glare contrast of the electronic display as the inspection object as one of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, applying the glare contrast of the qualified benchmark as the other of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, and comparing the glare contrast of the electronic display as the inspection object with the glare contrast of the qualified benchmark.

16. The method for manufacturing an electronic display according to claim 15, wherein: The electronic display to be inspected is an electronic display without an anti-glare layer on the surface, and in the inspection step, an anti-glare layer for inspection is arranged on the surface in order to measure the glare contrast. The anti-glare layer for inspection is an anti-glare layer having predetermined characteristics.

17. The method for manufacturing an electronic display according to claim 15, wherein: The electronic display to be inspected is an electronic display having an anti-glare layer disposed on the surface.

18. A method for manufacturing an anti-glare layer, wherein: The method for manufacturing the anti-glare layer comprises: a step of forming an anti-glare layer to be inspected; and The step of inspecting whether the anti-glare layer as the inspection object meets the qualified standard of glare contrast, The step of inspecting includes the step of comparing as claimed in claim 13, The comparison process includes the following steps: applying the glare contrast of an electronic display having the anti-glare layer as the inspection object configured on the surface as one of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, applying the glare contrast of the qualified benchmark as the other of the glare contrast as the comparison object and the glare contrast as the comparison benchmark, and comparing the glare contrast of the electronic display having the anti-glare layer as the inspection object configured on the surface with the glare contrast of the qualified benchmark.

19. The method for producing an anti-glare layer according to claim 18, wherein: In the inspection step, the anti-glare layer to be inspected is arranged on the surface of the electronic display for inspection in order to measure the glare contrast. The electronic display for inspection is an electronic display having predetermined characteristics.

20. The method for producing an anti-glare layer according to claim 18 or 19, wherein: The step of forming the anti-glare layer to be inspected includes the step of providing a layer having an anti-glare function on a substrate.

21. The method for producing an anti-glare layer according to claim 20, wherein: The step of providing the layer having an anti-glare function on the substrate comprises: A step of coating an anti-glare layer composition containing a resin on the substrate; and A step of curing the applied anti-glare layer composition.

22. An anti-glare layer, wherein: The anti-glare layer is produced using the method for producing an anti-glare layer according to any one of claims 18 to 21.

23. A glare contrast comparison device, wherein: The glare contrast comparison device comprises: a correction unit that corrects the glare contrast as a comparison object using the glare contrast correction method according to any one of claims 1 to 12; and The comparison unit compares the corrected glare contrast as a comparison object with the glare contrast as a comparison reference.

24. A method for selecting an anti-glare layer, wherein: The method for selecting an anti-glare layer comprises the step of selecting the anti-glare layer using the glare contrast comparison method according to claim 13, The process of selecting the anti-glare layer comprises the following steps: A step of applying a first measured contrast obtained by measuring the glare contrast of an electronic display having a first anti-glare layer disposed on a surface thereof by a first optical measuring device as the glare contrast serving as the comparison reference, applying a second measured contrast obtained by measuring the glare contrast of the electronic display having a second anti-glare layer different from the first anti-glare layer disposed on a surface thereof by a second optical measuring device different from the first optical measuring device as the glare contrast serving as the comparison object, and comparing the first measured contrast and the second measured contrast using the comparison method accompanied by correction of one of the two contrasts, the first measured contrast and the second measured contrast; and A step of selecting one of the first anti-glare layer and the second anti-glare layer based on the comparison result.

25. The method for selecting an anti-glare layer according to claim 24, wherein: The step of selecting the one anti-glare layer includes the step of selecting an anti-glare layer having a good corresponding measured contrast between the first anti-glare layer and the second anti-glare layer.

26. An anti-glare layer, wherein: The anti-glare layer is an anti-glare layer selected according to the method for selecting an anti-glare layer according to claim 24 or 25.

27. A polarizing plate, wherein: The polarizing plate is provided with an anti-glare layer selected by the method for selecting an anti-glare layer according to claim 24 or 25.

28. A display element, wherein: The display element is equipped with an anti-glare layer selected by the method for selecting an anti-glare layer according to claim 24 or 25.

29. An electronic display, wherein: The electronic display is equipped with an anti-glare layer selected according to the method for selecting an anti-glare layer according to claim 24 or 25.

30. A method for selecting a display element, wherein: The method for selecting a display element comprises a step of selecting a display element using the glare contrast comparison method according to claim 13, The process of selecting the display element includes the following steps: A step of applying a third measured contrast measured by a third optical measuring device in a state where a third anti-glare layer is disposed on a surface of a first display element as the glare contrast serving as the comparison reference, applying a fourth measured contrast measured by a fourth optical measuring device different from the third optical measuring device in a state where a second display element different from the first display element is disposed on a surface of the third anti-glare layer as the glare contrast serving as the comparison object, and comparing the third measured contrast and the fourth measured contrast using the comparison method accompanied by correction of one of the third measured contrast and the fourth measured contrast; and A step of selecting one of the first display element and the second display element based on a result of the comparison.

31. The method for selecting a display element according to claim 30, wherein: The step of selecting the one display element includes the step of selecting a display element having a good corresponding measured contrast ratio between the first display element and the second display element.

32. An electronic display, wherein: The electronic display includes a display element selected by the display element selection method according to claim 30 or 31.

Images