JP2004205849A - Display body and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display panel which is less affected by external light reflection and allows images of high contrast to be displayed thereon. <P>SOLUTION: Such a display panel 10a is provided that has; a light emitting layer 14 including a self-luminous light emitting element 14a; a conversion layer 22 which refracts output light L1 from the light emitting element 14a to turn the optical path toward the side of a user 90; and a circular polarizer 38 arranged on the output side, and has an anti-reflection film 31 provided on a refracting surface 21 of the conversion layer 22. External light L2 entering the display panel 10a is free from multiple reflection because of the anti-reflection film 31, and the external light L2 reflected by a lower electrode 12 of the display panel 10a is prevented from being outputted to the side of the user 90 again because of the circular polarizer 38. Consequently, such a display panel can be provided that suppresses the influence of external light to realize display of high contrast. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Prior art]
In recent years, as self-luminous flat panel displays (FPDs), display panels using organic EL elements and plasma display panels (PDPs) have been developed.
[0002]
In these display panels, light output from the light emitting element is transmitted through a transparent medium covering the light emitting element, and is observed as display light by a user through an interface between the surface of the transparent medium and air. Light is emitted from the light emitting element at almost all angles, but total reflection occurs at the interface between the surface of the transparent medium and the air, so that much light cannot escape from the transparent medium into the air (outside world). This is because there is a critical angle at which light emitted from the light emitting element is not output to the outside at the interface with the outside (panel surface) because the refractive index of the transparent medium is greater than 1. Therefore, of the light output from the light emitting element, light incident on the interface at a critical angle or more is not emitted to the outside, and only a limited percentage of light can be used as output light of the display panel. It is said that only about 20% to 30% of light from an organic EL element, which is a self-luminous luminous body, can be emitted outside a display panel.
[0003]
In order to improve the use efficiency or light extraction efficiency of the light output from the light-emitting element, a slope structure is created inside the panel, and the slope reflects light with a radiation angle greater than the critical angle, forming an interface with the outside world. On the other hand, it has been proposed to convert the light into a light beam or a light beam having a critical angle smaller than the critical angle to increase the light extraction efficiency.
[0004]
[Patent Document 1]
JP-A-10-189251
[Problems to be solved by the invention]
Japanese Patent Application Laid-Open No. Hei 10-189251 discloses that a wedge-shaped reflecting member is arranged around a light emitting element to convert the angle of light that is output from the light emitting element at a large angle and is likely to be incident on an interface at a critical angle or more. Is disclosed. However, the reflection member disposed around such a light emitting element also reflects external light such as sunlight or illumination light that has entered from the outside. Therefore, there is a problem that the external light is output as the ambient light with respect to the light emitted by the light emitting element, and the contrast between the display unit and the non-display unit cannot be secured. Furthermore, also when a reflective electrode such as aluminum is used as the back electrode of the light emitting element, light other than the light emitting element makes the area corresponding to the light emitting element brighter, which causes a reduction in contrast.
[0006]
As a method of suppressing such external light reflection, a method of attaching a circularly polarizing plate to the surface of a display panel has been proposed. When the external light passes through the circularly polarizing plate and enters the display panel and is reflected by the reflection member, when the light enters the circularly polarizing plate again, it cannot pass through the circularly polarizing plate, and thus the reflection of the external light can be suppressed.
[0007]
The method of preventing reflection of external light by using this polarizing plate utilizes the fact that the phase shifts by π when external light is reflected inside the display panel. However, external light is reflected a plurality of times by a reflective member or a reflective electrode inside the display panel, and part of the external light reflected when the elliptically polarized light is directed toward the emission direction or the output side, that is, toward the user. Since the light passes through the circularly polarizing plate, light that is not light output from the light emitting element is output from the periphery of the light emitting element, which reduces the contrast of light output from the light emitting element. Therefore, the reduction in contrast due to external light can be reduced by the circularly polarizing plate, but it is not sufficient. Considering that the amount of light output from the light emitting element is also reduced by the circularly polarizing plate, the reflection by external light is considered. It is not sufficient as a measure to prevent a decrease in contrast.
[0008]
In view of the above, an object of the present invention is to provide a display including a light emitting element, which can suppress reflection of external light and can secure a higher contrast, and a method for manufacturing the same.
[0009]
By providing a display panel by arranging a plurality of display bodies capable of high-contrast display, a display device such as a large flat display having high luminance and sufficient contrast and a small display for a portable device is provided. It is also an object of the present invention.
[0010]
[Means for Solving the Problems]
In order to prevent reflection of external light, it is preferable not to dispose an external light-reflecting element in the display panel. However, the use efficiency of the light output from the light-emitting element is reduced if there is no means for reducing the light from the light-emitting element to the critical angle or less. Therefore, in the present invention, a microlens or a prism having a V-shaped groove is laminated on a light-emitting layer including a light-emitting element, and light output from the light-emitting element has a critical angle or less with respect to an interface with the outside. Incident.
[0011]
In this method, since the optical path is converted by refraction instead of reflection, there is no reflective member around the light emitting element, and a decrease in contrast due to external light reflection can be prevented. Further, even if an antireflection film is provided on the refraction surface to prevent Fresnel reflection on the refraction surface, the use efficiency of light emitted from the light emitting element is not reduced. Therefore, it is possible to prevent light from being emitted from a light source other than the light emitting element from being output from the periphery of the light emitting element, and to enhance the contrast. However, when external light is reflected by a reflective electrode or the like, the contrast is reduced. Therefore, such reflected light is preferably removed by providing a polarizing plate. Therefore, by combining the refraction surface provided with the antireflection film and the polarizing plate, the problem of external light reflection in the display panel can be almost completely solved, and a display panel capable of high-contrast display is provided. it can.
[0012]
That is, the display of the present invention is a light-emitting layer including a light-emitting element, a conversion layer having a refraction surface that converts the optical path of the output light by refracting output light output from the light-emitting element, A polarizing plate laminated on the output side (emission direction), and an antireflection film is formed on the refraction surface. It is desirable to use a circularly polarizing plate as the polarizing plate.
[0013]
In the present invention, the conversion of the optical path, which is a major factor of the external light that has entered the display body being reflected a plurality of times, is performed on the refraction surface provided with the antireflection film. Therefore, one of the major factors that causes multiple reflection of light inside the display body is a transmission surface instead of a reflection surface, thereby preventing multiple reflection inside the display body. As a result, light other than the light output from the light-emitting element is not multiple-reflected inside the display body, and there is only a possibility that light reflected once is generated. If the light is reflected once, it is possible to efficiently prevent the light from being output from the display by disposing the circularly polarizing plate. For this reason, in the display of the present invention, it is possible to prevent external light that has entered the inside of the display from being output again, and to provide a display with sufficiently high contrast. One example of the light emitting element is an organic electroluminescent light emitting element (organic EL) or, for example, an inorganic EL.
[0014]
Therefore, a display panel capable of displaying a clear image with high contrast can be provided by arranging the display body of the present invention in a two-dimensional matrix. Further, a display device including the display panel of the present invention and a driving device for driving a light emitting element of the display panel to display an image can provide a display device capable of displaying a clear and high-quality image.
[0015]
The space between the refractive surface of the display of the present invention and the circularly polarizing plate has a refractive index of 1 or more, and is preferably a low refractive index layer smaller than the refractive index of the conversion layer. Since light must be supplied through a medium having a refractive index of 1, such as air or vacuum, as long as light is supplied to a user as a display body, inserting a medium having a refractive index of less than 1 between the two means that light utilization efficiency is high. Will be lowered. That is, if there is a medium having a refractive index smaller than 1, a critical surface having a larger critical angle than the critical angle at the interface between air and the conversion layer may be formed, and the amount of light output to the outside world may be reduced. And the light utilization efficiency decreases. On the other hand, if the medium has a larger refractive index than the conversion layer, there is no critical angle between the conversion layer and the medium, so that the light transmission efficiency increases, but the interface between the external air and the medium is high. The critical angle is larger than the critical angle at the interface when the conversion layer comes into contact with air. Therefore, also in this case, the light use efficiency is reduced. For this reason, it is desirable to provide a low refractive index layer having a refractive index of 1 or more and smaller than the refractive index of the conversion layer outside the conversion layer (output side).
[0016]
As a conversion layer having a refraction surface for converting an angle at an interface of output light output from a light emitting element, there is a trapezoidal prism whose portion corresponding to the light emitting element is convex in the output direction. Further, the prism may be convexly curved in the output direction. Further, a plurality of micro lenses arranged in an array may be used. The direction of the output light can be changed even in a refraction surface in which a plurality of projections having a triangular cross section are formed continuously. Furthermore, these triangles are made similar to each other, and by changing the size and pitch, the occurrence of interference fringes can be prevented.
[0017]
The display of the present invention having a conversion layer having these shapes has a step of laminating a transparent conversion layer on a light-emitting layer including a light-emitting element, and a step of forming a refraction surface by sweeping a blade of the surface of the conversion layer. It can be manufactured by a method including a step of forming an antireflection layer by depositing an antireflection member on the refraction surface and a step of laminating a circularly polarizing plate on the output side of the conversion layer.
[0018]
Therefore, according to the present invention, it is possible to provide a display panel capable of performing color display by using a self-luminous element such as an organic electroluminescence light-emitting element, which has high light use efficiency. In addition, a clear color image can be displayed by a display device including the display panel of the present invention and a driving device that drives a light-emitting element of the display panel to display an image.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a mobile phone as an example of a display device equipped with a display panel according to the present invention. The mobile phone 1 of this example includes a display panel (display device) 10a on which data is displayed, and a driving device 9 including a microcomputer or the like, and the driving device 9 forms an organic EL that forms the display panel 10a. By driving the element, the light L1 is output, and characters and images are provided to the user 90.
[0020]
FIG. 2 is an enlarged sectional view of a part of the display panel 10a. The display panel 10a includes a plurality of display bodies 19 each having an organic electroluminescence (organic EL) as a light emitting element 14a and arranged in a two-dimensional array or matrix. Each display body 19 functions as one pixel, and is driven by the driving device 9 by an active matrix system or a passive matrix system to emit light.
[0021]
Each display 19 includes a glass substrate 11, a light emitting layer 14 including a light emitting element 14a sequentially stacked on the glass substrate 11, and a conversion layer capable of converting an optical path of output light L1 from the light emitting element 14a. 22 and a circularly polarizing plate 38. The light emitting layer 14 is made of a metal, and in this example, a light emitting element 14a is disposed between a cathode electrode (lower electrode) 12 of aluminum and an anode electrode (upper electrode) 15 of ITO (transparent electrode). 14a emits light spontaneously by applying a voltage between the electrodes 12 and 15. The output light (display light) L1 output from the light emitting element 14a is disposed on a conversion layer 22 having a refraction surface 21 for converting an optical path, and on the output side of the conversion layer 22 at a position facing the substrate. The light is output to the outside world 40 through the circular polarizing plate 38.
[0022]
Further, the light emitting layer 14 includes a bank layer 13 made of polyimide for separating the light emitting element 14a. The display is performed by applying an organic EL resin by a technique such as ink jet so as to be aligned with the bank layer 13. The panel 10a can be manufactured.
[0023]
The conversion layer 22 of the display panel 10a is periodically arranged at the same pitch as the pitch of the light emitting elements 14a so that a portion corresponding to the light emitting elements 14a becomes a trapezoidal prism 23 that is convex in the output direction (upward in the drawing). It is provided with irregularly arranged irregularities. Therefore, when viewed on the display 19, the trapezoidal prism 23 is disposed above the light emitting element 14a, and the surfaces 21a and 21b of the trapezoidal prism 23, particularly the inclined surface 21b, become a refracting surface and have a large angle from the light emitting element 14a. Is refracted in the direction of the user 90 (output side or emission direction). In this example, the surfaces 21a and 21b of the prism 23 are interfaces with the outside world 40 excluding the circularly polarizing plate 38. By providing the inclined surface 21b and changing the angle of the interface, the output light L1 has an interface. Is increased, and the output light L1 from the light emitting element 14a is efficiently output to the outside.
[0024]
Further, in the display panel 10a of this example, an antireflection film 31 is formed along the surfaces 21a and 21b of the trapezoidal prism. In the present embodiment, the antireflection film 31 on the surface 21b (the slope 21b) is in contact with the air layer. Light (external light) L2 traveling from the outside world 40 to the display panel 10a is almost reflected by the surfaces 21a and 21b of the trapezoidal prism 23 of the conversion layer 22 after passing through the circularly polarizing plate 38 due to the presence of the antireflection film 31. Without passing through the prism 23. Therefore, the external light L2 is not reflected toward the outside by the surfaces 21a and 21b of the prism 23.
[0025]
The external light L2 transmitted through the surfaces 21a and 21b of the prism 23 is reflected when hitting the reflective lower electrode 12, and may pass through the conversion layer 22 and reach the circularly polarizing plate 38 again. However, since the reflected external light 2 is only reflected once by the electrode 12, the phase is shifted by π. Therefore, the reflected light does not pass through the circularly polarizing plate 38, and the external light L2 that has once entered the display panel 10a from the prism 23 is not output. Therefore, the light output from the display panel 10a through the polarizing plate 38 is only the display light L1 from the light emitting element 14a, and a high-contrast display is possible.
[0026]
On the other hand, assuming a display panel 99 having no anti-reflection film on the surfaces 21 and 21b of the trapezoidal prism 23 as shown in FIG. 3, the external light L2 reflected on the inclined surface 21b of the trapezoidal prism 23 becomes And may reach the circularly polarizing plate 38 again. The light that has been Fresnel-reflected a plurality of times on such an inclined surface 21b becomes elliptically polarized light. In addition to the light L1, the multiple reflected external light L2 is also output. For this reason, the contrast is reduced, which is a factor that hinders clear display.
[0027]
Therefore, in the display panel 10a of this example, it is noted that the surface 21b that changes the optical path of the light L1 in order to improve the efficiency of extracting the light L1 output from the light emitting element 14a may be a surface that does not require reflection. The surface 21b is coated with an anti-reflection film 31 to increase the transmittance, so that the external light L2, which is originally unnecessary, is positively taken into the display panel 10a. The external light L2 is prevented from being multiple-reflected inside the display panel 10a, and the number of reflections inside the display panel 10a is limited to one as much as possible, so that the external light L2 can be filtered by the circularly polarizing plate 38. I have.
[0028]
4A to 4C show an example of a method for manufacturing the conversion layer 22 including the trapezoidal prism 23. First, as shown in FIG. 4A, a metal (reflective) lower electrode 12 such as aluminum is deposited on a glass substrate 11 serving as a base. Then, a bank layer 13 is formed of polyimide on the lower electrode (cathode electrode) 12 of the aluminum, and the bank layer 13 surrounds four sides of the upper surface of the cathode electrode 12, and is formed in this region by a technique such as ink jet. The organic EL element 14a is stacked. Further, an upper electrode (anode electrode) 15 is formed of ITO (transparent electrode) along the light emitting element 14a and the bank layer 13. Then, a transparent, high-transmittance resin such as polycarbonate which becomes the conversion layer 22 (prism 23) is applied to the surface, and further cured.
[0029]
Separately, a cutting tool 60 for forming a prism patterned in a trapezoidal shape is prepared. The cutting tool 60 for forming the prism is applied to the cured resin conversion layer 22 and swept. As a result, as shown in FIG. 4B, the conversion layer 22 of the trapezoidal prism 23 that is convex upward is formed. The conversion layer 22 is not limited to a resin, but may be formed using a transparent medium such as silicon oxide (SiO 2), and then a trapezoidal prism may be formed using the cutting tool 60.
[0030]
As described above, by directly forming a groove in the conversion layer 22 using the cutting tool 60, the conversion layer 22 including the trapezoidal prism 23 having the slope can be formed in accordance with the arrangement of each light emitting element 14a. Therefore, the conversion layer 22 having high light extraction efficiency can be formed.
[0031]
Next, as shown in FIG. 4C, a thin antireflection film (AR coat) 31 is formed on the surface including the upper surface 21a and the inclined surface 21b of the trapezoidal prism 23.
[0032]
Then, as shown in FIG. 4 (d) or FIG. 2, by disposing a circularly polarizing plate 38 above the antireflection film 31 so as to face the base substrate 11, the display bodies 19 are arranged in a matrix. The display panel 10a arranged can be obtained. Then, as described above, the display panel 10a is a panel that hardly reflects the external light L2 and can display a high-contrast, clear image. Before attaching the circular polarizer 38 serving as the surface of the display panel 10a, it is necessary to coat the antireflection film 31 on the surface of the prism 23 serving as the internal structure of the display panel 10a. Since the antireflection film 31 can be coated at the stage where is determined, it is easy to add the process itself. Therefore, it is possible to provide the display panel 10a capable of performing high-contrast display at low cost.
[0033]
FIG. 5 shows a different example of the display panel. The display panel 10b of this example has substantially the same configuration as the display panel 10a shown in FIG. 2, and the conversion layer 22 includes a trapezoidal prism 23 arranged corresponding to the light emitting element 14a. The surfaces 21a and 21b of the trapezoidal prism 23 are coated with an antireflection film 31 to prevent the external light L2 from being multiply reflected. Further, in the display panel 10 b of the present example, the space between the conversion layer 22 and the circularly polarizing plate 38 is filled with the low refractive index layer 32. It is desirable that the low refractive index layer 32 has a refractive index of 1 or more and a refractive index of the conversion layer 22 or less. If the conversion layer 22 is silicon oxide, the refractive index is about 1.45. Therefore, as a material constituting the low refractive index layer 32, a fluorine-based polymer (refractive index: 1.36 to 1.42), magnesium fluoride (Refractive index: 1.38), silica airgel (refractive index: 1.08) and the like can be mentioned as candidates.
[0034]
By filling such a low refractive index layer 32, the gap between the conversion layer 22 and the circularly polarizing plate 38 can be filled, so that the strength of the display panel 10b is improved.
[0035]
On the other hand, when the refractive index of the low-refractive-index layer 32 is larger than the refractive index of the conversion layer 22, the refracting surface 21b does not work at all, but rather increases the angle of the output light L1. Since the critical angle at the interface between the low refractive index layer 32 and the external world 40 is larger than the critical angle between the conversion layer 22 and the external world 40, the light extraction efficiency is reduced. In this example, since the circularly polarizing plate 38 serves as an interface with the outside 40, the critical angle between the circularly polarizing plate 38 and the outside 40 may become dominant due to the refractive index of the circularly polarizing plate 38.
[0036]
Further, the form of the conversion layer 22 that can be employed in the display panel according to the present invention is not limited to the trapezoidal prism 23 shown in FIG. 2 or FIG. FIG. 6 shows a display panel 10c provided with a conversion layer 22 formed of a convex lens-shaped prism 24 that is curved upward (in the output direction of the light L1). In the conversion layer 22, the substantially horizontal surface 21a of the convex lens 24 is disposed corresponding to the light emitting element 14a, and the side surface 21c of the convex lens 24 becomes a refraction surface, and the direction of the output light L1 is changed to the emission direction of the user 90 ( (Upper side of FIG. 6, output side) to improve the extraction efficiency. An anti-reflection film 31 is formed on the surfaces 21a and 21c of the convex lens-shaped prism 21 to prevent multiple reflection of the external light L2 and to prevent a decrease in contrast due to the external light L2.
[0037]
The display panel 10d shown in FIG. 7 includes a conversion layer 22 composed of upwardly (output direction) convex microlenses 25 that are periodically arranged in an array. The surface 21d of the microlens 25 becomes a refraction surface, and the extraction efficiency of the output light L1 output from the light emitting element 14a can be improved. Further, an antireflection film 31 is formed on the surface 21d of the microlens 25 to prevent the external light L2 from being multiple-reflected on the surface 21d of the microlens 25, and the external light L2 is output to lower the contrast. Is prevented.
[0038]
In the display panel 10e shown in FIG. 8, a microprism 26 having a triangular microstructure 26a periodically arranged in an array is employed as the conversion layer 22. In the conversion layer 22, the surface 21e of the microprism 26 becomes a refraction surface, and the output light L1 extraction efficiency is improved. The antireflection film 31 is coated on the surface 21e of the microprism 26 to prevent multiple reflection of the external light L2. Therefore, the display panel 10e is also a display panel that has a high extraction efficiency from the light emitting element 14a, prevents a decrease in contrast due to the external light L2, and can display a clear image.
[0039]
The display panel 10f shown in FIG. 9 employs, as the conversion layer 22, a microprism 27 having a triangular microstructure 27a as in the display panel 10e of FIG. Further, in the conversion layer 22 of the present example, the microstructure 27a having a triangular cross section constituting the microprism 27 has a similar shape, and each cross section has a different size and a different pitch. Therefore, interference by the microprism 27 can be suppressed, and factors of image deterioration such as moire and streaks can be eliminated. The surface 21f of the microprism 27 is provided with the anti-reflection film 31, so that it is possible to provide a display panel capable of preventing the influence of the external light L2 and displaying a high-contrast image.
[0040]
As described above, according to the present invention, it is possible to prevent a situation in which external light is multiple-reflected in the display panel, and as a result, is transmitted through the anti-reflection polarizing plate. In the above example, a circular polarizing plate is used as the polarizing plate, but a combination of a polarizing plate that transmits linearly polarized light and a retardation plate may be used.
[0041]
Therefore, according to the present invention, it is possible to provide a display panel capable of displaying a high-quality and high-contrast image. Therefore, by adopting a display panel that is often operated under external light, such as a mobile phone or a portable information processing terminal, a clear image can be displayed both indoors and outdoors, night and day. A display device can be provided. Further, the present invention is not limited to a small display device, and can be applied to a display device having a large display panel of 30 inches or more.
[0042]
【The invention's effect】
As described above, in the present invention, in a display panel that outputs an output light from a light emitting element and displays an image, a conversion layer that converts an optical path by a refraction surface in order to improve an output light extraction efficiency is provided. By adopting an anti-reflection film on the refraction surface, multiple reflection of external light inside the display panel is prevented while maintaining the light extraction efficiency from the light emitting element. Therefore, by providing a polarizing plate such as a circularly polarizing plate for preventing reflection of external light, external light can be prevented from being output again from inside the display panel, and a display body and a display panel capable of displaying an image with high contrast can be provided. . Therefore, a low-cost display device capable of displaying a high-brightness or bright image can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a mobile phone equipped with a display panel according to the present invention.
FIG. 2 is a cross-sectional view illustrating an outline of a display panel of the present example.
FIG. 3 is a diagram showing, for comparison, a display panel in which an antireflection film is not provided on a refraction surface.
FIG. 4 is a diagram illustrating an outline of a process of manufacturing the display panel illustrated in FIG. 2;
FIG. 5 is a cross-sectional view schematically showing a different display panel provided with a low refractive index layer.
FIG. 6 is a cross-sectional view illustrating an outline of a different display panel including a conversion layer having a convex lens shape.
FIG. 7 is a cross-sectional view illustrating the outline of still another display panel including a microlens as a conversion layer.
FIG. 8 is a cross-sectional view showing an outline of still another display panel including a microprism as a conversion layer.
FIG. 9 is a cross-sectional view showing an outline of still another display panel including different microprisms as conversion layers.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cellular telephone 10a-10f Display panel 11 Substrate 12 Lower electrode 13 Bank layer 14 Light emitting layer 14a Light emitting element 15 Upper electrode 21b-21f Refraction surface 22 Conversion layer 23 Trapezoidal prism 25 Microlens 26, 27 Microprism 31 Antireflection film 32 Low Refractive index layer 38 Circular polarizing plate

Claims (12)

A light-emitting layer including a light-emitting element,
By refracting the output light output from the light emitting element, a conversion layer having a refraction surface that converts the optical path of the output light,
A polarizing plate laminated on the output side of the conversion layer,
A display body, wherein an antireflection film is formed on the refraction surface. The display according to claim 1, wherein the polarizing plate is a circular polarizing plate. The display according to claim 1, further comprising a low refractive index layer having a refractive index of 1 or more and smaller than a refractive index of the conversion layer between the antireflection layer and the polarizing plate. 2. The display according to claim 1, wherein the conversion layer is a trapezoidal prism whose portion corresponding to the light emitting element is convex in an output direction. The display according to claim 1, wherein the conversion layer is a prism whose portion corresponding to the light emitting element is convexly curved in an output direction. The display according to claim 1, wherein the conversion layer includes a plurality of microlenses arranged in an array. 2. The display according to claim 1, wherein the conversion layer includes the refraction surface on which a plurality of projections having a triangular cross section are formed continuously. The display body according to claim 7, wherein the triangle is a similar shape. The display according to any one of claims 1 to 8, wherein the light emitting element is an organic electroluminescence light emitting element. A display panel in which the display bodies according to claim 1 are arranged in a two-dimensional matrix. A display device comprising: the display panel according to claim 10; and a driving device that drives the light emitting element of the display to display an image. A step of laminating a transparent conversion layer on the light emitting layer including the light emitting element,
A step of forming a refraction surface by sweeping a blade on the surface of the conversion layer,
A step of depositing an anti-reflection member on the refraction surface to form an anti-reflection layer,
Laminating a polarizing plate on the output side of the conversion layer.

Images