WO2022024678A1 - ディスプレイユニット - Google Patents

ディスプレイユニット Download PDF

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Publication number
WO2022024678A1
WO2022024678A1 PCT/JP2021/025336 JP2021025336W WO2022024678A1 WO 2022024678 A1 WO2022024678 A1 WO 2022024678A1 JP 2021025336 W JP2021025336 W JP 2021025336W WO 2022024678 A1 WO2022024678 A1 WO 2022024678A1
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Prior art keywords
layer
antiglare layer
display
main surface
display unit
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PCT/JP2021/025336
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English (en)
French (fr)
Japanese (ja)
Inventor
眞誠 一色
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Ａｇｃ株式会社
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Priority to CN202180049847.7A priority Critical patent/CN116034412A/zh
Priority to JP2022540108A priority patent/JPWO2022024678A1/ja
Publication of WO2022024678A1 publication Critical patent/WO2022024678A1/ja

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • This disclosure relates to a display unit.
  • the antiglare layer is a glass substrate that has been subjected to antiglare treatment and has irregularities.
  • the antiglare treatment includes, for example, at least one selected from frost treatment, etching treatment, and blasting treatment of the surface of the glass substrate, or coating and firing of a coating liquid on the glass substrate.
  • the anti-glare treatment reduces the reflection of surrounding objects or lighting, but may cause glare called Sparkle.
  • Sparkle is a random unevenness with a size larger than a pixel. The unevenness is caused by the unevenness acting as a minute lens. Further, the antiglare treatment may cause scattering of transmitted light, increase the haze value, and reduce the sharpness of the transmitted image.
  • the display unit described in Patent Document 3 has a pixel substrate and an antiglare layer.
  • the unevenness of the antiglare layer acts as a microlens.
  • the antiglare layer is arranged close to the pixel array so that the distance between the pixel array and the antiglare layer is smaller than the focal length of the microlens.
  • Patent Document 3 it is mentioned that the focal point of the microlens is on the pixel array as the cause of Sparkle generation.
  • a lens focused on a pixel array is a convex lens, not a concave lens.
  • the focal point of the concave lens is located on the opposite side of the pixel array with respect to the antiglare layer.
  • One aspect of the present disclosure provides a technique for suppressing glare when the unevenness of the antiglare layer mainly acts as a concave lens.
  • the display unit includes a display including a liquid crystal layer or a light emitting layer, and an antiglare layer.
  • the antiglare layer includes a first main surface including irregularities and a second main surface opposite to the first main surface, and is laminated on the display with the second main surface facing the display. ..
  • the screen of the display is arranged vertically or at an angle to the ground.
  • the median value of the rate of change in the inclination of the unevenness in the horizontal direction of the screen is positive, the glare index value S is less than 5.00%, and the reflection image diffusivity index value D is 0. It is 10 or more and the haze value is 25.00% or less.
  • the total of the obtained values is larger than 0 mm. , 1.2 mm or less.
  • glare can be suppressed when the unevenness of the antiglare layer mainly acts as a concave lens.
  • FIG. 1 is a cross-sectional view of a display unit according to an embodiment.
  • FIG. 2 is a cross-sectional view of a display unit according to a modified example.
  • FIG. 3 is a diagram showing an example of a measuring device having a reflected image diffusivity index value D.
  • the display unit 1 according to the present embodiment will be described with reference to FIG.
  • the display unit 1 is, for example, for an in-vehicle use.
  • the use of the display unit 1 is not particularly limited.
  • the display unit 1 includes, for example, a display 2 and an antiglare layer 3.
  • the display 2 and the antiglare layer 3 are adhered to each other by an adhesive layer such as OCA (Optical Clear Adaptive).
  • OCA Optical Clear Adaptive
  • the display 2 is, for example, a liquid crystal display.
  • the display 2 includes a touch sensor 21, a first polarizing element 22, a color filter substrate 23, a liquid crystal layer 24, a TFT substrate 25, a second polarizing element 26, and a backlight 27 from the antiglare layer 3 side. Are included in this order.
  • the touch sensor 21 detects the proximity of an object such as a finger to the screen of the display 2.
  • the touch sensor 21 accepts the operation of the occupant of the vehicle.
  • the touch sensor 21 has an arbitrary configuration, and the display 2 does not have to include the touch sensor 21.
  • the first polarizing element 22 and the second polarizing element 26 are linear polarizing elements, respectively. These two linear transducers are arranged with the absorption axis offset by 90 °.
  • the color filter substrate 23, the liquid crystal layer 24, and the TFT substrate 25 are arranged between the first polarizing element 22 and the second polarizing element 26.
  • the color filter substrate 23 includes, for example, a glass substrate, a color filter, a common electrode, and an alignment film in this order from the first polarizing element 22 toward the liquid crystal layer 24.
  • the alignment film orients the liquid crystal molecules of the liquid crystal layer 24.
  • the TFT substrate 25 includes, for example, a glass substrate, a pixel electrode, and an alignment film in this order from the second polarizing element 26 toward the liquid crystal layer 24.
  • the alignment film orients the liquid crystal molecules of the liquid crystal layer 24.
  • the TFT substrate 25 further includes a TFT as a driving element for driving the pixel electrodes.
  • the liquid crystal layer 24 is arranged between the color filter substrate 23 and the TFT substrate 25. A voltage is applied to the liquid crystal layer 24 for each pixel. The orientation of the liquid crystal molecules changes depending on the application of voltage, and the brightness of the pixels changes.
  • the backlight 27 irradiates the liquid crystal layer 24 with light via the second polarizing element 26 and the TFT substrate 25.
  • the light passes through the color filter substrate 23, the first polarizing element 22, the touch sensor 21, and the antiglare layer 3 and is emitted.
  • the display 2 may further include a functional layer other than the above.
  • the display 2 may further have an adhesive layer.
  • the adhesive layer adheres adjacent layers to each other.
  • the antiglare layer 3 includes a first main surface 3a including irregularities and a second main surface 3b opposite to the first main surface 3a, and the second main surface 3b is directed toward the display 2 and is above the display 2. Is laminated to.
  • the antiglare layer 3 is a so-called cover glass.
  • the antiglare layer 3 is a glass substrate, and the glass substrate includes irregularities.
  • the unevenness is formed by, for example, at least one selected from a frost treatment, an etching treatment, and a blast treatment on the surface of the glass substrate.
  • the unevenness can disperse the reflection direction of light and suppress the reflection of surrounding objects or lighting.
  • the unevenness is formed on the first main surface 3a and not on the second main surface 3b.
  • the second main surface 3b is protected by a mask when forming irregularities on the first main surface 3a.
  • the unevenness may also be formed on the second main surface 3b.
  • the antiglare layer 3 of the present embodiment is a glass substrate, and the glass substrate contains irregularities, but the antiglare layer 3 includes a glass substrate and a coating layer, and the coating layer may include irregularities. Unevenness is formed by applying and firing the coating liquid.
  • the glass substrate of the antiglare layer 3 is also simply referred to as a glass substrate.
  • the glass substrate is formed by a float method, a fusion method, a down draw method, or the like.
  • the glass substrate may be bent. Further, the glass substrate may be tempered glass.
  • the tempered glass is air-cooled tempered glass or chemically tempered glass.
  • the thickness of the glass substrate is, for example, 0.05 mm to 3 mm. If the glass substrate is tempered glass, the strength of the glass substrate can be ensured while reducing the thickness of the glass substrate.
  • the glass of the glass substrate is, for example, soda lime glass, borosilicate glass, aluminosilicate glass, or non-alkali glass. Among these, aluminosilicate glass is preferable.
  • the antiglare layer 3 may include a resin substrate instead of the glass substrate or in addition to the glass substrate.
  • the resin substrate has excellent flexibility.
  • the median value of the rate of change in the slope of unevenness is positive.
  • the median value is calculated from the height distribution of the unevenness.
  • the height distribution of the unevenness is measured with a commercially available laser microscope or the like.
  • the measuring device and measuring conditions are as follows, for example. Measuring device: Keyence laser microscope VK-X250 Measuring conditions: Objective lens 50x, high-definition mode.
  • the height z (xi, yj) of the unevenness is measured at a plurality of points (xi, yj) arranged in a matrix at equal pitches.
  • i is a natural number from 1 to M
  • j is a natural number from 1 to N.
  • the pitch in the x-axis direction and the pitch in the y-axis direction of the plurality of measurement points are the same, for example, 0.139 ⁇ m.
  • the x-axis, y-axis and z-axis are perpendicular to each other.
  • the x-axis and y-axis are set parallel to the screen of the display 2.
  • the screen of the display 2 is arranged vertically or diagonally with respect to the ground, and the horizontal direction of the screen is the x-axis direction.
  • the z-axis positive direction is set in the direction from the second main surface 3b of the antiglare layer 3 toward the first main surface 3a.
  • the slope of the unevenness in the x-axis direction is a value obtained by first-ordering z (xi, yj) with respect to x, and is expressed by the following equation (1).
  • the rate of change in the slope of the unevenness in the x-axis direction is a value obtained by second-order differentializing z (xi, yj) with respect to x, and is expressed by the following equation (2).
  • the fact that the median value of the rate of change in the inclination of the unevenness (second derivative) in the x-axis direction is positive means that the unevenness of the antiglare layer 3 mainly acts as a concave lens.
  • the glare index value S of the antiglare layer 3 is less than 5.00%.
  • the measuring method of S is the same as the measuring method described in Patent Documents 1 and 2, and is specifically as follows.
  • Pixel Pattern attached to SMS-1000 manufactured by D & MS is installed as a photomask with its pattern surface facing up.
  • the antiglare layer 3 is installed on the pattern surface of the photomask with its first main surface 3a facing upward.
  • the camera of the apparatus SMS-1000 captures an area of 190 dpi of the pattern surface of the photomask through the antiglare layer 3.
  • the Sparkle value obtained by image analysis of the measuring device is S.
  • the measurement is performed in the DIM (Difference Image Method) mode.
  • the distance between the image sensor of the camera and the antiglare layer 3 is 540 mm.
  • As the camera lens a 23FM50SP lens having a focal length of 50 mm is used at the aperture 16.
  • S is, for example, 0% or more and less than 5.00%, preferably 0% or more and less than 4.00%, and more preferably 0% or more and less than 3.00%. If S is less than 5.00%, glare is suppressed.
  • the antiglare layer 3 has a reflected image diffusivity index value D of 0.10 or more.
  • the measuring method of D will be described with reference to FIG.
  • the measuring device 70 includes a linear light source device 71 and a surface brightness measuring device 75.
  • the linear light source device 71 includes a light source 711 and a black flat plate 712.
  • the black flat plate 712 is arranged horizontally and has a rectangular (101 mm ⁇ 1 mm) slit in a vertical direction.
  • a light source 711 is provided in the slit.
  • the light source 711 is a white light source of a cold cathode fluorescent lamp (CCFL).
  • CCFL cold cathode fluorescent lamp
  • the antiglare layer 3 is horizontally arranged below the linear light source device 71 and the surface luminance measuring device 75 with the first main surface 3a having irregularities formed facing upward.
  • the surface luminance measuring device 75 is arranged on a plane perpendicularly intersecting with the linear light source device 71 at the center in the longitudinal direction of the linear light source device 71.
  • the focal point of the surface luminance measuring instrument 75 is aligned with the image of the linear light source device 71 reflected by the antiglare layer 3. That is, the focused surface of the image is aligned with the black flat plate 712.
  • a black plate is brought into contact with the second main surface 3b of the antiglare layer 3. Therefore, the light detected by the surface luminance measuring instrument 75 is the reflected light reflected by the antiglare layer 3.
  • This ray 734 is observed by the surface luminance measuring instrument 75 as an image of a portion where the black flat plate 712 and the virtual ray 733-2 intersect.
  • the incident angle of the virtual ray 733-2 is equal to the reflection angle of the ray 734.
  • the brightness of the portion illuminated by the light beam 732 specularly reflected by the antiglare layer 3 becomes the highest, and a bright line appears in that portion.
  • An image with lower brightness can be obtained as the distance from the emission line to the left and right sides.
  • the brightness at a position away from the emission line becomes the brightness corresponding to the intensity of the light rays scattered by the antiglare layer 3. Therefore, the luminance cross-section profile in the direction perpendicular to the emission line is extracted.
  • the data may be integrated in the direction parallel to the emission line.
  • D is calculated by substituting the obtained D1, D2, and D3 into the following equation (3).
  • the reflected image diffusivity index value D shows a good correlation with the judgment result of the antiglare property visually by the observer. For example, the smaller D (closer to zero), the worse the antiglare property, and conversely, the larger D (closer to 1), the better the antiglare property.
  • the measurement of D1, D2 and D3 can be carried out by using, for example, the device SMS-1000 manufactured by DM & S.
  • a C1614A lens with a focal length of 16 mm is used with an aperture of 5.6.
  • the distance from the first main surface 3a of the antiglare layer 3 to the camera lens is about 300 mm, and the Imaging Scale is set in the range of 0.0276 to 0.0278.
  • D is, for example, 0.10 or more and less than 1.00, preferably 0.20 or more and less than 1.00, and more preferably 0.30 or more and less than 1.00.
  • D is more preferably 0.90 or more. If D is 0.90 or more, S tends to be small.
  • the antiglare layer 3 has a haze value of 25.00% or less.
  • the haze value is measured with a commercially available measuring device.
  • the measuring device and measuring conditions are as follows, for example. Measuring device: Suga tester Haze meter HZ-V3 Measurement conditions: Based on Japanese Industrial Standards (JIS K 7136: 2000), measurement is performed using a C light source.
  • the haze value is, for example, 0% or more and 25.00% or less, preferably 0% or more and 20.00% or less, and more preferably 0% or more and 15.00% or less. When the haze value is 25.00% or less, the sharpness of the transmitted image is good.
  • the present inventor pays attention to the point that the distance between the conventional antiglare layer 3 and the liquid crystal layer 24 is long, and even if the uneven shape is such that S is out of the permissible range in the conventional design, d described later. It was found that if the value is set to 1.2 mm or less, S, D, and the haze value can be kept within the respective allowable ranges.
  • D is a value obtained by dividing the thickness of each layer from the first main surface 3a of the antiglare layer 3 to the liquid crystal layer 24 by the refractive index, and is the sum of the obtained values.
  • d is calculated by the following equation (4).
  • t1 is the thickness of the antiglare layer 3
  • n1 is the refractive index of the antiglare layer 3.
  • t2 is the thickness of the touch sensor 21, and n2 is the refractive index of the touch sensor 21.
  • t3 is the thickness of the first polarizing element 22, and n3 is the refractive index of the first polarizing element 22.
  • t4 is the thickness of the color filter substrate 23, and n4 is the refractive index of the color filter substrate 23.
  • the thickness t1 of the antiglare layer 3 is the distance between the convex portion of the unevenness of the first main surface 3a of the antiglare layer 3 and the second main surface 3b of the antiglare layer 3.
  • the height difference of the unevenness of the first main surface 3a of the antiglare layer 3 is about 50 to 5000 nm, which is smaller than d, and can be ignored when calculating d.
  • d is, for example, 0.03 mm or more.
  • the color filter substrate 23 has a glass substrate, a color filter, a common electrode, and an alignment film. Therefore, t4 / n4 is the sum of the obtained values obtained by dividing the thickness of each layer constituting the color filter substrate by the refractive index. The same applies to other layers having a multi-layer structure.
  • D is, for example, 1.2 mm or less, preferably 1.0 mm or less, more preferably 0.8 mm or less, still more preferably 0.6 mm or less, and particularly preferably 0.4 mm or less.
  • d is naturally larger than 0.0 mm.
  • the display 2 of this modification is not a liquid crystal display but an organic EL display.
  • the display 2 includes the touch sensor 41, the circularly polarizing element 42, the first substrate 43, the light emitting layer 44, and the second substrate 45 in this order from the antiglare layer 3 side.
  • the touch sensor 41 is the same as the touch sensor 21 of the above embodiment, the description thereof will be omitted.
  • the circular polarizing element 42 suppresses the reflection of external light.
  • the circular polarizing element 42 includes, for example, a linear polarizing element and a quarter wavelength film.
  • the circular polarizing element 42 has an arbitrary configuration, and the display 2 does not have to include the circular polarizing element 42.
  • the first substrate 43 includes, for example, a glass substrate or a resin substrate and a transparent electrode.
  • the light generated in the light emitting layer 44 passes through the transparent electrode.
  • the light emitting layer 44 includes, for example, a red light emitting layer, a green light emitting layer, and a blue light emitting layer.
  • the light emitting layer 44 may include a white light emitting layer.
  • the white light emitting layer is used in combination with a color filter.
  • a voltage is applied to the light emitting layer 44 for each pixel.
  • the light emitting layer 44 emits light depending on the application of voltage.
  • the second substrate 45 includes, for example, a glass substrate or a resin substrate and a reflective electrode.
  • the light generated in the light emitting layer 44 is reflected by the reflective electrode and passes through the light emitting layer 44 and the transparent electrode.
  • the display 2 is not limited to the structure shown in FIG.
  • the light extraction method of the display 2 may be either a top emission method or a bottom emission method.
  • various functions such as a hole injection layer, a hole transport layer, an electron transport layer, or an electron injection layer are provided between the first substrate 43 and the light emitting layer 44, or between the second substrate 45 and the light emitting layer 44. Layers may be arranged.
  • the median value of (A) the rate of change in the inclination of the unevenness (second derivative) is positive, and (B) the glare index value S is 5, as in the above embodiment. It is less than .00%, (C) the reflection image diffusivity index value D is 0.10 or more, and (D) the haze value is 25.00% or less.
  • the value obtained by dividing the thickness of each layer from the first main surface 3a of the antiglare layer 3 to the light emitting layer 44 by the refractive index is obtained, and the value is obtained.
  • the total value d is 1.2 mm or less. If d is 1.2 mm or less, S, D, and the haze value can be kept within their respective allowable ranges.
  • Example 1 The first main surface of a glass substrate (AGC, Dragontrail: 100 mm ⁇ 100 mm) was subjected to antiglare treatment to obtain an antiglare layer.
  • a wet blast treatment and an etching treatment were performed in this order.
  • a mask film SPV-3620 manufactured by Nitto Denko Corporation was attached to the second main surface of the glass substrate before the etching treatment. The mask film was removed after the etching process.
  • the treatment conditions for the wet blast treatment were as follows. ⁇ Abrasive grains: Alumina abrasive grains (# 800) -Blast gun movement speed: 10 [mm / s] ⁇ Injection angle: 90 ° ⁇ Injection pressure: 0.25MPa -Number of treatments: 1-Distance between the blast gun and the substrate: 30 [mm].
  • the processing conditions for the etching process were as follows. ⁇ Etching treatment liquid (an aqueous solution containing 5 wt% of HF and 5 wt% of HCl) -Immersion time in the etching treatment liquid: 26 [min].
  • Example 2 to 4 Comparative Examples 1 to 5
  • the antiglare layer was prepared under the same conditions as in Example 1 except that the plate thickness of the glass substrate was changed.
  • the antiglare layer was prepared under the same conditions as in Comparative Example 3 except that the treatment conditions for the antiglare treatment were changed in order to change the uneven shape.
  • the etching treatment was performed under the same conditions as in Comparative Example 3 except that the immersion time was changed from 26 min to 1 min.
  • Comparative Example 5 the count of the alumina abrasive grains was changed from # 800 to # 2000, the moving speed of the blast gun was changed from 10 mm / s to 200 mm / s, and the distance between the blast gun and the substrate was changed from 30 mm.
  • the wet blast treatment was performed under the same conditions as in Comparative Example 3 except that the immersion time was changed to 70 mm, and then the etching treatment was performed under the same conditions as in Comparative Example 3 except that the immersion time was changed from 26 min to 5 min.
  • Example 6 the antiglare layer was produced under the same conditions as in Comparative Example 3 except that the treatment conditions for the antiglare treatment were changed in order to change the uneven shape. Specifically, in Comparative Example 6, the wet blasting treatment was performed under the same conditions as in Comparative Example 3 except that the count of the alumina abrasive grains was changed from # 800 to # 2500, and then the immersion time was changed from 26 min to 5 min. Except for the above, the etching process was performed under the same conditions as in Comparative Example 3.
  • Example 5 Comparative Examples 6 to 7
  • the first main surface of the glass substrate AAC, Dragontrail: 100 mm ⁇ 100 mm
  • the antiglare treatment was performed in the order of pre-etching treatment and etching treatment.
  • a mask film SPV-3620 manufactured by Nitto Denko Corporation
  • the mask film was removed after the etching process.
  • the glass substrate was immersed in hydrofluoric acid (0.5 wt%) for 30 seconds.
  • the glass substrate was immersed in a mixed solution of hydrofluoric acid (15 wt%), ammonium fluoride (10 wt%), and sulfuric acid (50 wt%) for 10 seconds.
  • hydrofluoric acid 15 wt%
  • ammonium fluoride 10 wt%
  • sulfuric acid 50 wt%
  • ⁇ Glitter index values S and d> In order to measure the glare index value S of each antiglare layer, a simulated display unit including the antiglare layer, a photomask, and a backlight was prepared in this order. As the backlight, TMN150X180-22GD-4 manufactured by Aitec System Co., Ltd. was used. The method for measuring the glare index value S is as described above. In the above simulated display unit, d is a value obtained by dividing the thickness of the glass substrate, which is the antiglare layer, by its refractive index.
  • glare index value S For the glare index value S, 0% or more and less than 3.00% is evaluated as “good”, 3.00% or more and less than 5.00% is evaluated as “possible”, and 5.00% or more is evaluated as “impossible”. evaluated. “Good” and “OK” are pass, and "No” is fail.
  • ⁇ Reflective image diffusivity index value D> The reflection image diffusivity index value D of each antiglare layer was measured as described above. As for the reflection image diffusivity index value D, 0.30 or more and less than 1.00 is evaluated as “good”, 0.10 or more and less than 0.30 is evaluated as “possible”, and 0 or more and less than 0.10 is “impossible”. I evaluated it. “Good” and “OK” are pass, and "No" is fail.
  • ⁇ Haze value> The haze value of each antiglare layer was measured as described above. As for the haze value, 0% or more and 25.00% or less were evaluated as “good”, and more than 25.00% were evaluated as “impossible”. “Good” is a pass and “impossible” is a failure.
  • Table 1 shows the evaluation results.
  • Example 1 to 4 and Comparative Examples 1 to 3 since the antiglare layer was produced under the same conditions except that the plate thickness of the glass substrate was changed as described above, the antiglare layer has the same uneven shape. As is clear from comparing Examples 1 to 4 with Comparative Examples 1 to 3, d is set to 1 even if the uneven shape is such that S is out of the permissible range when d exceeds 1.2 mm. It can be seen that if the thickness is 2 mm or less, S, D, and the haze value can be kept within their respective allowable ranges. As is clear from comparing Example 4 and Example 6, when D is 0.90 or more, S tends to be small.
  • Display unit 2 Display 24 Liquid crystal layer 3 Anti-glare layer 3a 1st main surface 3b 2nd main surface

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PCT/JP2021/025336 2020-07-31 2021-07-05 ディスプレイユニット WO2022024678A1 (ja)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014119650A (ja) * 2012-12-18 2014-06-30 Sumitomo Chemical Co Ltd 防眩性偏光板および画像表示装置
JP2016040211A (ja) * 2014-08-12 2016-03-24 武蔵野ファインガラス株式会社 アンチグレアガラスの製造方法
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JP2019123652A (ja) * 2018-01-18 2019-07-25 Ａｇｃ株式会社 ガラス板及び表示装置
JP2019144475A (ja) * 2018-02-22 2019-08-29 Ａｇｃ株式会社 透光性構造体
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JP2020052433A (ja) * 2014-08-01 2020-04-02 日東電工株式会社 防眩フィルムおよび画像表示装置
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