JP7045655B2 - Display device and optical film manufacturing method - Google Patents

Description

The present invention relates to a display device including an optical film having an optical effect on the light emitted from the display surface of the display device, and a method for manufacturing the optical film.

A liquid crystal display device, which is an example of a display device, is used in various fields. Recently, organic LED (Organic Light Emitting Diode) display devices are also becoming widespread.

In a liquid crystal display device, the color of an image within a viewing angle may change significantly due to a change in light intensity according to a viewing angle, light leakage in an oblique direction, or the like.

On the other hand, in the organic LED display device, a blue shift is likely to occur in an image visually recognized from an angle. The blue shift is a phenomenon in which an image viewed in an oblique direction becomes bluer than an image viewed in a front view. That is, even in the image displayed by the organic LED display device, for example, the color tone within the viewing angle may be significantly changed due to such a blue shift.

The color change within the viewing angle as described above is a factor that can deteriorate the display quality of the image. Other factors that affect the display quality include, for example, variations in contrast within the viewing angle. Various techniques for improving the display quality of images have been conventionally proposed. For example, Patent Documents 1 to 8 disclose optical films provided on the display surface of a display device for improving the display quality of images. Has been done.

Japanese Unexamined Patent Publication No. 7-43704 Patent No. 3272833 Patent No. 3621959 Japanese Unexamined Patent Publication No. 2016-126350 Japanese Unexamined Patent Publication No. 2012-145944 Japanese Unexamined Patent Publication No. 2011-118393 US Patent Gazette No. 9507059 Japanese Unexamined Patent Publication No. 2018-5113

In the above-mentioned optical film, there are a film in which two portions having different refractive indexes are arranged alternately at a constant pitch, a film in which a light transmitting portion and a light absorbing portion are arranged alternately at a constant pitch, and the like. On the other hand, the display panel constituting the display device together with such an optical film usually includes pixels arranged at a constant pitch. Therefore, moire is likely to occur when the display panel and the optical film are overlapped with each other. Moire can reduce the quality of the displayed image, so it is desirable to suppress or make it inconspicuous.

Further, in the above optical film, image blurring due to diffraction may occur. Since such image blurring can also deteriorate the quality of the displayed image, it is desired to suppress or make it inconspicuous.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a display device and a method for manufacturing an optical film, which can suppress the visibility of a display image from being impaired by moire and diffraction.

The display device according to the present invention is
A display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch, and
The first optical function unit and the second optical function unit are arranged on the display panel so as to transmit light from the plurality of pixels and have a first optical function unit and a second optical function unit having different optical performances from each other. An optical film in which the optical functional units are arranged at a predetermined functional unit arrangement pitch, respectively, is provided.
The pixel arrangement pitch is p (μm).
The functional unit arrangement pitch is set to q (μm).
When the distance between the surface of the pixel on the optical film side and the surface of the optical film on the pixel side in the direction facing each other is d (μm).
It is a display device in which q ≦ 0.5p and tan (asin (0.7 / q)) <p / d holds.
Further, the display device according to the present invention is
A display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch, and
The first optical function unit and the second optical function unit are arranged on the display panel so as to transmit light from the plurality of pixels and have a first optical function unit and a second optical function unit having different optical performances from each other. An optical film in which the optical functional units are arranged at a predetermined functional unit arrangement pitch, respectively, is provided.
The pixel arrangement pitch is p (μm).
The functional unit arrangement pitch is set to q (μm).
The first optical function unit and the second optical function unit are arranged at the functional unit arrangement pitch q in the same direction as the direction in which the plurality of pixels are arranged at the pixel arrangement pitch p.
When the distance between the surface of the pixel on the optical film side and the surface of the optical film on the pixel side in the direction facing each other is d (μm).
It is a display device in which q ≦ 0.5p and tan (asin (0.7 / q)) <p / d holds.
Further, the display device according to the present invention is
A display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch, and
The first optical function unit and the second optical function unit are arranged on the display panel so as to transmit light from the plurality of pixels and have a first optical function unit and a second optical function unit having different optical performances from each other. An optical film in which the optical functional units are arranged at a predetermined functional unit arrangement pitch, respectively, is provided.
The plurality of pixels are arranged in the first direction and in the second direction orthogonal to the first direction.
The first optical function unit and the second optical function unit are arranged alternately in each of the first direction and the second direction.
The pixel arrangement pitch in which the plurality of pixels are arranged in the first direction is defined as the first pixel arrangement pitch p1 (μm), and the pixel arrangement pitch in which the plurality of pixels are arranged in the second direction is defined as the first pixel arrangement pitch p1 (μm). The second pixel array is p2 (μm).
The functional unit array pitch in which the first optical functional unit and the second optical functional unit are arranged in the first direction is defined as the first functional unit array pitch q1 (μm), and the second optical function unit is arranged in the second direction. The functional unit array pitch in which the 1 optical functional unit and the second optical functional unit are arranged is defined as the second functional unit array pitch q2 (μm).
When the distance between the surface of the pixel on the optical film side and the surface of the optical film on the pixel side in the direction facing each other is d (μm).
q1 ≦ 0.5p1 and tan (asin (0.7 / q1)) <p1 / d holds, and q2 ≦ 0.5p2 and tan (asin (0.7 / q2)) <p2. It is a display device that holds / d.

As the pixel, a plurality of sub-pixels may be arranged in a striped manner.

For the pixel, a plurality of sub-pixels may be arranged in a pentile manner.

The display panel may be an organic LED panel.

The display panel may be a liquid crystal panel.

The method for producing an optical film according to the present invention is as follows.
A method for manufacturing an optical film arranged on a display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch.
The optical film has a first optical function unit and a second optical function unit having different optical performances, and the first optical function unit and the second optical function unit are arranged at a predetermined functional unit arrangement pitch, respectively. It is a thing
The step of specifying the pixel arrangement pitch p (μm) and
A step of specifying a distance d (μm) in a direction in which the surface of the pixel on the optical film side and the surface of the optical film on the pixel side face each other when the optical film is arranged on the display panel. ,
The functional unit sequence pitch q (μm) is specified, where q ≦ 0.5p and tan (asin (0.7 / q)) <p / d holds, where q (μm) is the functional unit sequence pitch. With the process of
It is an optical film manufacturing method for manufacturing the optical film based on the specified functional unit arrangement pitch q (μm).

Further, the method for manufacturing an optical film according to the present invention is as follows.
A method for manufacturing an optical film arranged on a display panel that emits light from a plurality of pixels arranged in a first direction and arranged in a second direction orthogonal to the first direction at a predetermined pixel arrangement pitch. There,
The optical film has a first optical function unit and a second optical function unit having different optical performances, and the first optical function unit and the second optical function unit each have a predetermined functional unit arrangement pitch. It is arranged alternately in each of the first direction and the second direction.
The pixel arrangement pitch in which the plurality of pixels are arranged in the first direction is defined as the first pixel arrangement pitch p1 (μm), and the pixel arrangement pitch in which the plurality of pixels are arranged in the second direction is defined as the first pixel arrangement pitch p1 (μm). The step of specifying as the second pixel array p2 (μm) and
A step of specifying a distance d (μm) in a direction in which the surface of the pixel on the optical film side and the surface of the optical film on the pixel side face each other when the optical film is arranged on the display panel. ,
The functional unit array pitch in which the first optical functional unit and the second optical functional unit are arranged in the first direction is defined as the first functional unit array pitch q1 (μm), and the first in the second direction. The functional unit array pitch in which the optical functional unit and the second optical functional unit are arranged is defined as the second functional unit array pitch q1 (μm), q1 ≦ 0.5p1, and tan (asin (0.7). / Q1)) <p1 / d holds, q2 ≦ 0.5p2, and tan (asin (0.7 / q2)) <p2 / d holds. A step of specifying the second functional unit array pitch q2 (μm) is provided.
It is an optical film manufacturing method which manufactures the optical film based on the said 1st function part arrangement pitch q1 (μm) and the said 2nd function part arrangement pitch q2 (μm).

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a display device capable of suppressing the visibility of a displayed image from being impaired by moire and diffraction.

It is a figure which shows roughly the structure of the display device which concerns on one Embodiment of this invention. It is a figure which shows the pixel arrangement of the display device shown in FIG. It is a figure which shows the optical film in the display device shown in FIG. It is a figure which shows the optical film which concerns on the modification of FIG. 3A. It is a figure which shows one modification of the display device shown in FIG. It is a figure which shows one modification of the display device shown in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In this specification, terms such as "sheet", "film", and "board" are not distinguished from each other based only on the difference in names. Therefore, for example, "sheet" is a concept including a member that can also be called a film or a plate. Further, in the present specification, the “sheet surface (plate surface, film surface)” refers to the plane direction (plane direction) of the target sheet-like member when the target sheet-like member is viewed as a whole and in a broad sense. ) Refers to the surface that matches. The "sheet surface (plate surface, film surface)" may be referred to as a main surface. Further, in the present specification, the normal direction of the sheet-shaped member refers to the normal direction of the target sheet-shaped member to the seat surface.

FIG. 1 is a diagram schematically showing a configuration of a display device 10 according to an embodiment. The display device 10 includes an organic LED (Organic Light Emitting Diode) panel 20 and an optical film 100. The display device 10 according to the present embodiment is, for example, a television, but may be a tablet terminal, a smartphone, a computer display, a car navigation system, or the like.

The organic LED panel 20 and the optical film 100 may be adjacent to each other. Further, a circularly polarizing plate, a touch panel, a cover glass, or the like may be arranged between the organic LED panel 20 and the optical film 100. When a circularly polarizing plate, a touch panel, a cover glass, or the like is arranged between the organic LED panel 20 and the optical film 100, adjacent members may be joined by an adhesive layer.

The organic LED panel 20 has a plate shape, and the optical film 100 is arranged so that the film surface thereof is parallel to the plate surface of the organic LED panel 20. In FIGS. 1 and the figures used in the following description, reference numeral D1 indicates a _first direction parallel to the plate surface of the organic LED panel ₂₀ and the film surface of the optical film 100, and reference numeral D2 indicates an organic LED panel. A _second direction is shown which is a direction parallel to the plate surface of 20 and the film surface of the optical film 100 and which is a direction orthogonal to the first direction D1. Further, the reference numeral D ₃ indicates a third direction orthogonal to both the first direction D ₁ and the second direction D ₂ .

The organic LED panel 20 has a plurality of pixels 21 composed of a plurality of subpixels (21R, 21G, 21B in this example) having different colors from each other, and emits light for image formation from the plurality of pixels 21. As shown in FIG. 2, the pixel 21 in the present embodiment is formed by arranging a plurality of sub-pixels 21R, 21G, and 21B in a striped manner as an example.

The sub-pixel 21R emits red light, the sub-pixel 21G emits green light, and the sub-pixel 21B emits blue light. In addition to the sub-pixels 21R, 21G, and 21B, the pixel 21 may further have sub-pixels that emit white color. The organic LED panel 20 may be of a type in which white light is colored by a color filter and transmitted, or may be a so-called separate painting type in which subpixels such as RGB emit light independently.

With reference to FIGS. 1 and 2, the plurality of pixels 21 are arranged in the first direction D1 with the _first pixel array pitch p1 and in the second direction D2 with the _second pixel array pitch p2. There is. In the present embodiment, the first pixel array pitch p1 and the second pixel array pitch p2 are set to the same constant values, but they may be set to different values from each other.

The optical film 100 is arranged on the organic LED panel 20 so as to transmit light from the plurality of pixels 21, and faces the organic LED panel 20 directly or faces the organic LED panel 20 via the plurality of layers. The optical film 100 has a first optical function unit 101 and a second optical function unit 102 having different optical performances from each other. The first optical function unit 101 and the second optical function unit 102 are arranged alternately at a predetermined functional unit arrangement pitch q in the first direction D ₁ , respectively. The functional part array pitch q is a constant value.

In the present embodiment, the refractive index of the first optical function unit 101 is different from the refractive index of the second optical function unit 102, and the organic LED panel is provided at the interface between the first optical function unit 101 and the second optical function unit 102. By refracting or reflecting the light from 20, the display quality of the image visually recognized through the optical film 100 can be improved. The illustrated first optical function unit 101 and the second optical function unit 102 have, for example, a shape in which the interfaces in contact with each other in the _first direction D1 are inclined, but such a shape is not particularly limited and is the same as that shown in the figure. May have a different shape. As an example, the second optical functional unit 102 shown in FIG. 1 is one side of the optical film 100, specifically the back side, and is tapered toward the organic LED panel 20 side in a cross-sectional view in the thickness direction. The tip is flat and parallel to the front and back surfaces of the optical film 100. The flat surface at the tip of the second optical function unit 102 and the side surface located between the base end thereof are arcuate or multistage in the cross-sectional view in the thickness direction shown in FIG. 1, and in detail, the first optical It has an arc shape that is convex toward the functional unit 101. However, the side surface of the second optical functional unit 102 may be concave on the side opposite to the first optical functional unit 101 side in the cross-sectional view in the thickness direction shown in FIG. Further, the refractive index of the first optical functional unit 101 may be lower or higher than the refractive index of the second optical functional unit 102.

Reference numeral d in FIG. 1 indicates the distance between the surface of the pixel 21 on the optical film 100 side and the surface of the optical film 100 on the pixel 21 side in the directions facing each other.
Here, in the display device 10 according to the present embodiment, when the units of the first pixel array pitch p1, the second pixel array pitch p2, the functional unit array pitch q, and the distance d are represented by “μm”, respectively. The following conditions (1) and (2) are satisfied.
Condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d
Condition (2): q ≦ 0.5p2 and tan (asin (0.7 / q)) <p2 / d

When the above conditions (1) and / or conditions (2) are satisfied, it is possible to prevent the visibility of the display image formed by the display device 10 from being impaired by moire and diffraction. The inventor of the present invention makes it difficult to visually recognize moiré even if moiré occurs, the relationship between the moiré pitch and the pixel array pitches p1 and p2, and even if image blurring occurs due to diffraction, it becomes difficult to visually recognize the image blurring. As a result of diligent research on the relationship between the image blur occurrence position and the pixel array pitches p1 and p2, the above relationship has been specified.

In the condition (1) and the condition (2), first, "q ≦ 0.5p1" and "q ≦ 0.5p2" are defined as conditions for making moire difficult to see. Moire occurs periodically in stripes due to the difference in periodicity between the pixel arrangement pitches p1 and p2 and the functional part arrangement pitch q. The pitch PM in which moire occurs periodically can be specified by (p1 × q) / (p1-q) or (p2 × q) / (p2-q). The latter equation is an equation applied when the first optical function unit 101 and the second optical function unit 102 are alternately arranged in the _second direction D2. As a result of diligent research and experiments, the inventor of the present invention found that when the moiré pitch PM is the same as the pixel array pitches p1 and p2 or smaller than the pixel array pitches p1 and P2, the moiré is relatively inconspicuous. I found that. Then, as a condition satisfying this, "q ≦ 0.5p1" and "q ≦ 0.5p2" have been specified.

On the other hand, "tan (asin (0.7 / q)) <p1 / d" and "tan (asin (0.7 / q)) <p2 / d" make it difficult to visually recognize the image blur due to diffraction. It is stipulated as a condition of. When diffraction occurs due to the first optical function unit 101 or the second optical function unit 102 of the optical film 100, the image blur of one eye centering on the first optical function unit 101 or the second optical function unit 102 ( Diffraction fringes) appear at the position of d × tan (asin (λ / q)). λ is a wavelength, and the wavelength of red light is approximately 0.7 μm, the wavelength of blue light is approximately 0.47 μm, and the wavelength of green light is approximately 0.52 μm. Based on such a wavelength, the image blur (diffraction fringe) corresponding to the red light of one eye centering on the first optical function unit 101 or the second optical function unit 102 is d × tan (asin (0.7 (0.7)). The first image blur (diffraction fringe) that appears at the position / q)) and corresponds to the blue light and the green light appears inside the image blur corresponding to the red light of the first eye.
As a result of diligent research and experiments, the inventor of the present invention found that the position of the image blur of one eye centered on the first optical function unit 101 or the second optical function unit 102 is smaller than the pixel array pitches p1 and p2. Found that the image blur was relatively inconspicuous. Then, when the position where the image blur corresponding to the red light of the first eye is generated becomes smaller than the pixel arrangement pitches p1 and p2, the first image blur corresponding to the red light, the blue light, and the green light is conspicuous. I found it to disappear. Then, as a condition satisfying this, "tan (asin (0.7 / q)) <p1 / d" and "tan (asin (0.7 / q)) <p2 / d" are specified. rice field.

Therefore, when the above condition (1) and / or the condition (2) is satisfied, it is possible to prevent the visibility of the displayed image from being impaired by moire and diffraction. The inventor of the present invention has confirmed the effects of satisfying the above conditions (1) and / or conditions (2) through various prototypes.
In the above conditions (1) and (2), the pixel arrangement pitches p1 and p2 and the functional part arrangement pitch q are not particularly limited. For example, the pixel array pitches p1 and p2 may be set to 316 μm or less on a 55-inch monitor, or may be set to 155 μm or less on a 17-inch monitor. Such pixel array pitches p1 and p2 are gradually becoming smaller with the progress of technology, and it is expected that the definition will be further improved in the future.
The mathematical formulas defined in the above conditions (1) and (2) are useful in flexibly designing a desirable optical film according to the tendency of the pixel arrangement pitch in the future.

As an example, the first optical function unit 101 and the second optical function unit 102 shown in FIG. 1 extend linearly in the _second direction D2, and in this case, the first optical function unit 101 and the second optical unit The functional unit 102 has the shape shown in FIG. 3A when viewed in the _third direction D3. In this case, if at least the condition (1): “q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d” is satisfied, the visibility of the displayed image is impaired by moire and diffraction. It can be suppressed. That is, the pixel arrangement pitch defined in the same direction and the functional portion arrangement pitch may at least satisfy the condition (1), for example.

Further, as shown in FIG. 3B, the second optical function unit 102 has a quadrangular pyramid shape, a truncated cone shape, or the like, and may be arranged two-dimensionally, such as a matrix shape. In FIG. 3B, the pitch of the second optical functional unit 102 in the _first direction D1 is defined as the first functional unit array pitch q1. The pitch in the _second direction D2 of the second optical functional unit 102 is defined as the second functional unit array pitch q2. That is, in this configuration, the first optical function unit 101 and the second optical function unit 102 are alternately arranged in the first direction D1 at the _first function unit arrangement pitch q1 and in the _second direction D2, respectively. The second functional part is arranged alternately at the pitch q2.
In this case, the condition (1): “q1 ≦ 0.5p1 and tan (asin (0.7 / q1)) <p1 / d” and the condition (2): “q2 ≦ 0.5p2”. And, it is desirable that tan (asin (0.7 / q2)) <p2 / d "holds. When both are true, the visibility of the displayed image can be effectively suppressed from being impaired by moire and diffraction, but even when only one of them is true, the visibility of the displayed image is impaired by moire and diffraction. It can be suppressed.
The plurality of second optical functional units 102 may have a shape connected in a grid pattern, or may be formed in a hexagonal frustum shape and arranged in a honeycomb shape, for example.

Further, the organic LED panel 20 and the optical film 100 shown in FIG. 1 are adjacent to each other, and there is an air layer between them. On the other hand, a circular polarizing plate, a touch panel, a cover glass, or the like may be arranged between the organic LED panel 20 and the optical film 100. When one or more members are present between the organic LED panel 20 and the optical film 100 as described above, the refractive index of the one or more members is taken into consideration in the conditions (1) and (2). You may. In this case, the distance d in the condition (1) and the condition (2) may be replaced with n × d indicating the optical path length. n is a refractive index, and is usually in the range of 1.0 or more and 1.8 or less.

Hereinafter, an example of a method for manufacturing the optical film 100 according to the present embodiment will be described.

First, a display panel to be installed on the optical film 100, for example, an organic LED panel 20 is specified. Then, the first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 of the organic LED panel 20 are specified.

Next, when the optical film 100 is arranged on the organic LED panel 20, the distance d (μm) in the direction in which the surface of the pixel 21 on the optical film 100 side and the surface of the optical film 100 on the pixel 21 side face each other is specified. do. Since the distance d can change depending on whether or not a member is provided between the optical film 100 and the organic LED panel 20, the thickness of the display device to be manufactured, and the like, the distance d can be changed according to the specifications of the display device. It is necessary to specify as appropriate. Further, when considering the refractive index n of the member between the organic LED panel 20 and the optical film 100, the optical path length n × d is specified.

Then, based on the first pixel arrangement pitch p1, the second pixel arrangement pitch p2, and the distance d specified as described above, the condition (1): q ≦ 0.5p1 and tan (asin (0. 7 / q)) <p1 / d and / or condition (2): function of the optical film 100 in which q ≦ 0.5p2 and tan (asin (0.7 / q)) <p2 / d holds. The sub-arrangement pitch q (μm) is specified. Then, an optical film 100 in which the first optical functional unit 101 and the second optical functional unit 102 are arranged is manufactured based on the specified functional unit arrangement pitch q.

According to the manufacturing method as described above, it is possible to easily manufacture a display device capable of suppressing the visibility of the displayed image from being impaired by moire and diffraction.

Although one embodiment of the present invention has been described above, the above embodiment is an example, and various modifications can be made to the above-mentioned display device 10. For example, as shown in FIG. 4, the pixel 21 may have a plurality of sub-pixels 21R, 21G, and 21B arranged in a pentile manner. Further, as shown in FIG. 5, the optical film 100 may be a so-called louver film. In this case, the first optical function unit 101 is a light absorption unit, and the second optical function unit 102 is a light transmission unit. Further, although not shown, the display device may be configured by using a liquid crystal panel instead of the organic LED panel 20.

When the pixel 21 arranges a plurality of sub-pixels 21R, 21G, 21B in a pentile manner, the pixel arrangement direction may be defined in a direction different from the first direction D ₁ or the second direction D ₂ shown in FIG. .. In the example of FIG. 4, for example, a direction tilted by 45 degrees with respect to the first direction D ₁ or the second direction D ₂ can also be defined as a pixel arrangement direction. In such a case, the pixel array pitch in the pixel array direction forming the smallest angle (including 0 degrees) with the direction defining the functional unit array pitch is determined in the condition (1) and the condition (2). It may be adopted. In other words, in the present embodiment, the case where the optical film is designed by adopting the pixel arrangement pitch and the functional part arrangement pitch defined in the same direction in the condition (1) and the condition (2), and 0 degrees are excluded. The direction that defines the pixel array pitch forming the smallest angle and the direction that defines the functional part array pitch are specified, and the pixel array pitch and the functional part array pitch in these two specified directions are the conditions (1) and the condition (2). ) Is adopted when designing an optical film.

Hereinafter, examples of the present invention and comparative examples thereof will be described.

The display device according to the first to ninth embodiments has the form shown in FIG. 1, and satisfies the condition (1) and the condition (2) described in the above embodiment. On the other hand, although the display devices according to Comparative Examples 1 to 4 have the form shown in FIG. 1, they do not satisfy the above conditions (1) and (2). The display device according to the embodiment and the comparative example has specific dimensions set in the display device 10 described in the embodiment. The optical film 100 is a stripe type, and the first optical functional unit 101 and the second optical functional unit 102 are arranged in the _first direction D1 at the functional unit arrangement pitch q, respectively.

(Example 1)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 55 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0127, and the p1 / d and p2 / d are about 0.087.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 2)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 43.8 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0159, and the p1 / d and p2 / d are about 0.087.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 3)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional unit arrangement pitch q is 31.8 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0220, and the p1 / d and p2 / d are about 0.087.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 4)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 25.0 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0280, and the p1 / d and p2 / d are about 0.087.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 5)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 8.6 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.08615, and the p1 / d and p2 / d are about 0.087.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 6)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 8.1 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0867, and the p1 / d and p2 / d are about 0.087.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 7)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional unit arrangement pitch q is 3.0 μm.
The distance d is 450 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0240, and the p1 / d and p2 / d are about 0.2466.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 8)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 1.6 μm.
The distance d is 220 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0477, and the p1 / d and p2 / d are about 0.5045.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Example 9)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional unit arrangement pitch q is 1.0 μm.
The distance d is 100 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.9802, and p1 / d and p2 / d are 1.11.
Therefore, the condition (1): q ≦ 0.5p1 and tan (asin (0.7 / q)) <p1 / d, and the condition (2): q ≦ 0.5p2 and tan ( asin (0.7 / q)) <p2 / d holds.

(Comparative Example 1)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 60 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.01166, and the p1 / d and p2 / d are about 0.087.
Therefore, q ≦ 0.5p1 and q ≦ 0.5p2 do not hold. On the other hand, tan (asin (0.7 / q)) <p1 / d and tan (asin (0.7 / q)) <p2 / d hold.

(Comparative Example 2)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional unit arrangement pitch q is 3.0 μm.
The distance d is 1270 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.02487, and the p1 / d and p2 / d are about 0.2466.
Therefore, although q ≦ 0.5p1 and q ≦ 0.5p2 hold, tan (asin (0.7 / q)) <p1 / d and tan (asin (0.7 / q)) <p2 / d Does not hold.

(Comparative Example 3)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional part arrangement pitch q is 1.6 μm.
The distance d is 450 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.0486, and the p1 / d and p2 / d are about 0.24665.
Therefore, although q ≦ 0.5p1 and q ≦ 0.5p2 hold, tan (asin (0.7 / q)) <p1 / d and tan (asin (0.7 / q)) <p2 / d Does not hold.

(Comparative Example 4)
The first pixel arrangement pitch p1 and the second pixel arrangement pitch p2 are 111 μm.
The functional unit arrangement pitch q is 1.0 μm.
The distance d is 220 μm.
0.5p1 and 0.5p2 are 55.5 μm.
The tan (asin (0.7 / q)) is about 0.9802, and p1 / d and p2 / d are 0.5045.
Therefore, although q ≦ 0.5p1 and q ≦ 0.5p2 hold, tan (asin (0.7 / q)) <p1 / d and tan (asin (0.7 / q)) <p2 / d Does not hold.

The evaluation was performed by visually verifying whether moire and image blur were conspicuous. In all of Examples 1 to 9, neither moire nor image blur was noticeable. On the other hand, in Comparative Example 1, moire was a little conspicuous. In Comparative Examples 2 to 4, the image blur was quite conspicuous. From this result, the effect of the present invention was confirmed.

10 ... Display device 20 ... Organic LED panel 21 ... Pixel 21R, B, G ... Subpixel 100 ... Optical film 101 ... First optical function unit 102 ... Second optical function unit

Claims (8)

A display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch, and
The first optical function unit and the second optical function unit are arranged on the display panel so as to transmit light from the plurality of pixels and have a first optical function unit and a second optical function unit having different refractive indexes . The optical functional units are arranged alternately at a constant functional unit arrangement pitch, and the optical functional unit is provided with an optical film in which the first optical functional unit and the second optical functional unit are in contact with each other in the arranged direction .
The pixel arrangement pitch is p (μm), and the pixel arrangement pitch p is 155 μm or less.
The functional unit arrangement pitch is set to q (μm).
When the distance between the surface of the pixel on the optical film side and the surface of the optical film on the pixel side in the direction facing each other is d (μm).
A display device in which q ≦ 0.5p and tan (asin (0.7 / q)) <p / d holds. A display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch, and
The first optical function unit and the second optical function unit are arranged on the display panel so as to transmit light from the plurality of pixels and have a first optical function unit and a second optical function unit having different refractive indexes. The optical functional units are arranged alternately at a constant functional unit arrangement pitch, and the optical functional unit is provided with an optical film in which the first optical functional unit and the second optical functional unit are in contact with each other in the arranged direction .
The pixel arrangement pitch is p (μm), and the pixel arrangement pitch p is 155 μm or less.
The functional unit arrangement pitch is set to q (μm).
The first optical function unit and the second optical function unit are arranged at the functional unit arrangement pitch q in the same direction as the direction in which the plurality of pixels are arranged at the pixel arrangement pitch p.
When the distance between the surface of the pixel on the optical film side and the surface of the optical film on the pixel side in the direction facing each other is d (μm).
A display device in which q ≦ 0.5p and tan (asin (0.7 / q)) <p / d holds. A display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch, and
The first optical function unit and the second optical function unit are arranged on the display panel so as to transmit light from the plurality of pixels and have a first optical function unit and a second optical function unit having different refractive indexes . The optical functional units are arranged alternately at a constant functional unit arrangement pitch, and the optical functional unit is provided with an optical film in which the first optical functional unit and the second optical functional unit are in contact with each other in the arranged direction .
The plurality of pixels are arranged in the first direction and in the second direction orthogonal to the first direction.
The first optical function unit and the second optical function unit are arranged alternately in each of the first direction and the second direction.
The pixel arrangement pitch in which the plurality of pixels are arranged in the first direction is defined as the first pixel arrangement pitch p1 (μm), and the pixel arrangement pitch in which the plurality of pixels are arranged in the second direction is defined as the first pixel arrangement pitch p1 (μm). The second pixel array p2 (μm) is used, and the first pixel array pitch p1 and the second pixel array p2 are 155 μm or less.
The functional unit array pitch in which the first optical functional unit and the second optical functional unit are arranged in the first direction is defined as the first functional unit array pitch q1 (μm), and the second optical function unit is arranged in the second direction. The functional unit array pitch in which the 1 optical functional unit and the second optical functional unit are arranged is defined as the second functional unit array pitch q2 (μm).
When the distance between the surface of the pixel on the optical film side and the surface of the optical film on the pixel side in the direction facing each other is d (μm).
q1 ≦ 0.5p1 and tan (asin (0.7 / q1)) <p1 / d holds, and q2 ≦ 0.5p2 and tan (asin (0.7 / q2)) <p2. A display device that holds / d. The display device according to any one of claims 1 to 3, wherein the pixels are arranged in a striped manner with a plurality of sub-pixels. The display device according to any one of claims 1 to 3, wherein the pixels are arranged in a pentile manner with a plurality of sub-pixels. The display device according to any one of claims 1 to 5, wherein the display panel is an organic LED panel. The display device according to any one of claims 1 to 5, wherein the display panel is a liquid crystal panel. A method for manufacturing an optical film arranged on a display panel that emits light from a plurality of pixels arranged at a predetermined pixel arrangement pitch.
The optical film has a first optical function unit and a second optical function unit having different refractive indexes , and the first optical function unit and the second optical function unit are alternately arranged at a constant functional unit arrangement pitch. The first optical function unit and the second optical function unit are in contact with each other in the direction of arrangement and arrangement , and the pixel arrangement pitch is 155 μm or less.
The step of specifying the pixel arrangement pitch p (μm) and
A step of specifying a distance d (μm) in a direction in which the surface of the pixel on the optical film side and the surface of the optical film on the pixel side face each other when the optical film is arranged on the display panel. ,
The functional unit sequence pitch q (μm) is specified, where q ≦ 0.5p and tan (asin (0.7 / q)) <p / d holds, where q (μm) is the functional unit sequence pitch. With the process of
A method for manufacturing an optical film, which manufactures the optical film based on the specified functional unit array pitch q (μm).

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