JPH1174072A - Thin film el panel and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the lowering of contrast in a thin film EL element, by equipping a micro lens whose optical refraction factor of a translucent member having a protruded type shape is set higher than that of insulating liquid. SOLUTION: A thin film EL panel incorporates many micro lenses 16 to one picture element, constituted at a refraction factor difference of 0.22 between, a protruded type shape 10a having a refraction factor of 1.52 composed of high-refraction-factor translucent resin having a protruded lens shape, and low- refraction-factor insulation liquid 15a having a refraction factor of 1.3, in a panel inside; thereby improving brightness, also obtaining sharp picture image. That is, light, never outgoing in the front direction from a sealing glass 8 so far, can be taking out in the front direction, thereby improving brightness. Also, the distance, between the picture element of a thin film EL element 7 and the micro lens 16, can be shortened by the refraction factor difference, thereby preventing the incidence of light from the other picture element into the micro lens 16 corresponding to some picture element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a thin-film EL panel having a microlens and a method of manufacturing the same.

[0002]

2. Description of the Related Art With the advent of the information technology era, the demand for flat displays has increased, and among them, a thin-film EL panel has a long service life, and is attracting particular attention as an FA display.

Recently, as shown in FIG. 7A, white light emitted from a thin-film EL element 7 having a single light-emitting layer is taken out from a seal glass 8 side on which a color filter 9 is formed, and The development of color thin-film EL panels having a structure to obtain display colors corresponding to red, green and blue filters has been actively conducted.
No. 2398 and JP-A-5-94879. However, the thin-film EL panel having this structure has a problem that the luminance is reduced because white light emission of the thin-film EL element is separated by a color filter.

[0004] Further, as shown in FIG.
Of the light emitted from the pixels of the element 7, the light incident on the seal glass 8 at a deep angle close to the vertical is emitted directly to the front and used as light emission of one pixel of the thin film EL panel, but is incident at a relatively shallow angle. The reflected light is totally reflected at the boundary between the seal glass 8 and the outside air due to a difference in the optical refractive index between the seal glass 8 and the outside air, propagates while being repeatedly reflected without being emitted to the outside, and is emitted from the end face of the seal glass 8. Not used for panel pixel emission. That is, of the light emitted from the thin-film EL element 7, only the light incident at a deep angle in the front direction is effectively extracted.

Although it differs depending on the structure, the light extraction efficiency used for display in the conventional thin film EL panel is about 10% of the total light emission of the thin film EL element 7, and the remaining 90% not used for display. If several percent of the light can be extracted in the front direction, the brightness will be dramatically improved.

[0006] As a method of improving the brightness, a thin film EL is used.
There are two methods, improvement of the luminous efficiency of the element 7 and improvement of the efficiency of taking out the emitted light. The former has been actively developed, but the latter is not actively developed and a good method is required. As a method for realizing this, there is a method of providing a microlens film 17 having irregularities on the observation surface side above the seal glass 8 for each pixel as shown in FIG. Further, as shown in FIG. 9A, by providing the substrate embedded microlens 18 in the thin-film EL element 7 and the sealing glass 8 on the color filter 9 side, the distance between the pixel and the microlens can be reduced. Brightness can be improved, and a sharp display image without blur can be obtained.
For example, it is disclosed in JP-A-61-59388.

[0007]

As shown in FIG. 8A, the luminance can be improved by attaching a microlens film 17 having an uneven shape to the observation surface side above the sealing glass 8 as shown in FIG. Since the region and the microlens are separated by the thickness of the seal glass 8, a part of the light emitted from another pixel is emitted to the front lens of a certain pixel by the microlens, the angle of incidence is changed by the microlens, and the light is emitted to the front. The leaked light of other pixels is also observed in the emitted light at the same time, so that the displayed image is blurred and the sharpness is lost in the image.

Further, the microlens film 17 attached to the surface of the sealing glass 8 has a problem that the surface is scratched since the film is relatively soft. Further, when the substrate embedded microlens 18 shown in FIG. 9A is used, a special glass is used for the seal glass 8 or the manufacturing process becomes complicated, so that it becomes very expensive, it is difficult to increase the size, and the yield is high. There was a problem of bad.

[0009] Further, as shown in FIG.
When a substrate embedded micro lens 18 is provided therein, a color filter 9 is provided between the micro lens 18 and the pixel of the thin film EL element in order to prevent color shift due to a change in observation angle. It is a structure provided on the side. At this time, the external light that has entered the panel is scattered by the microlenses 18 and is again emitted to the outside of the panel, so that the panel surface looks whitish and the contrast is reduced. This is exactly the same in FIG. 8A, and when a plurality of lenses are provided for one pixel, the panel surface looks completely white.

The present invention has been made in view of the above problems, and has as its object to provide a thin film E having a microlens.
An object of the present invention is to prevent a reduction in contrast in an L element.

[0011]

According to the present invention, an EL panel substrate on which a thin-film EL element is formed and a light-transmitting sealing substrate are adhered so that the thin-film EL element is located inside, and the EL panel substrate and the EL panel substrate are bonded to each other. In a thin-film EL panel provided with an insulating liquid that fills a gap between seal substrates, a light-transmissive member having a convex shape is provided on the EL panel substrate side of the seal substrate so as to be in contact with the insulating liquid. The optical refractive index n1 of the light transmitting member and the optical refractive index n2 of the insulating liquid are n.
The liquid crystal display device further includes a microlens made of the insulating liquid and the convex-shaped light-transmitting member set to satisfy 1> n2.

Further, the present invention provides an EL panel substrate on which a thin-film EL element is formed and a light-transmitting seal substrate.
In a thin-film EL panel provided with an insulating liquid that is adhered so that an element is located inside and fills a gap between the EL panel substrate and the seal substrate, the thin substrate is in contact with the insulating liquid on the EL panel substrate side of the seal substrate. The concave-shaped light-transmitting member is provided, and the optical refractive index n1 of the concave-shaped light-transmitting member and the optical refractive index n2 of the insulating liquid are set to n1 <n2. And a microlens made of the insulating liquid.

The invention according to claim 1 and claim 2 is shown in FIG.
As shown in (b), a microlens 16 composed of an irregular shape 10 made of a light-transmitting resin and an insulating liquid 15 is provided on the thin film EL element 7 side of the color filter 9, so that a front direction from the sealing glass 8 has been achieved. The light that has not been emitted to the front can be taken out in the front direction, and the luminance can be greatly improved.

Further, as shown in FIG.
Irregularities 10 made of a translucent resin on the thin film EL element 7 side
When the microlens 16 composed of the optical refractive index difference between the microlens 16 and the insulating liquid 15 is provided, the distance between the pixel of the thin film EL element and the microlens 16 can be reduced, and the microlens 16 corresponding to a certain pixel can be provided. Light from other pixels is prevented from being incident, and light bent toward the light emission portion of the other pixels by the microlens 16 also causes total reflection due to the optical refractive index difference between the seal glass 8 and the outside air. Therefore, the image cannot be observed by the observer, so that a sharp image without blur can be obtained.

Further, the microlenses 16 are provided inside the panel, and even if the uneven shape 10 made of a translucent resin is formed of a relatively soft material such as a resin, the surface will not be scratched.

Further, the present invention is characterized in that a plurality of microlenses made of the translucent member and the insulating liquid are provided for one pixel of the thin film EL element.

According to the third aspect of the present invention, the height of the microlens 16 is very low because of a structure in which a large number of small lens-like irregularities are provided for one pixel, and the height of the microlens 16 is extremely low. Since there is almost no distance between the panel substrate and the seal substrate, light leaking from other pixels enters the lens of the pixel and is not observed as a part of the light emission of the pixel. An image is obtained.

Further, the present invention is characterized in that the translucent member has a hemispherical or polygonal pyramid uneven shape.

According to the invention of claim 4, light can be effectively extracted to the display side.

Further, the present invention is characterized in that the irregularities of the translucent member are two or more types having different sizes.

Further, the present invention is characterized in that the concave and convex shape of the translucent member is at least two types having different widths.

According to the fifth and sixth aspects of the present invention, a plurality of microlenses per pixel are arranged side by side in a concavo-convex shape having different sizes and widths or at irregular intervals so that the microlenses have a uniform size. In the case of juxtaposition in irregular shapes or uniform intervals, it is possible to prevent interference fringes and coloring from occurring on the display due to differences in reflectance and light collection efficiency depending on the wavelength of light.

Further, the present invention is characterized in that a color filter is provided between the translucent member and the seal substrate.

According to a seventh aspect of the present invention, as shown in FIG. 9B, a microlens 16 composed of a concave-convex shape 10 made of a transparent resin and an optical refractive index difference between an insulating liquid 15 and a color filter 9 is used. Since the microlens 16 is provided on the side of the thin film EL element 7, that is, on the back side of the color filter 9 when viewed from an observer, the color filter 9 is provided twice before the incident external light is scattered and emitted to the outside of the panel. , And most of the light is absorbed by the color filter 9, so that the amount of emitted light is small, and a decrease in contrast can be prevented.

Further, the present invention provides an EL panel substrate on which a thin-film EL element is formed, a light-transmitting seal substrate,
An insulating liquid that fills a gap between the panel substrate and the seal substrate; a light-transmitting member having an uneven shape provided on the EL panel substrate side of the seal substrate so as to be in contact with the insulating liquid; In a method of manufacturing a thin-film EL panel including a microlens made of an optical member and the insulating liquid, a translucent resin having a predetermined pattern is formed by photolithography after applying a translucent resin having photosensitivity. The light-transmitting member having the uneven shape is formed.

The invention according to claim 8 is the micro lens 16
Is made up of the irregular shape 10 made of inexpensive translucent resin and the insulating liquid 15, and the irregular shape 10 made of translucent resin can be manufactured by photolithography, which is a method suitable for mass production, so that the size is increased. It can be manufactured at a good yield and at low cost.

Further, the present invention provides an EL panel substrate on which a thin-film EL element is formed, a light-transmitting seal substrate,
An insulating liquid that fills a gap between the panel substrate and the seal substrate; a light-transmitting member having an uneven shape provided on the EL panel substrate side of the seal substrate so as to be in contact with the insulating liquid; In the method for manufacturing a thin-film EL panel provided with a microlens made of an optical member and the insulating liquid, a translucent resin is applied, and then pressed with a stamper and a stamping die is used to form the translucent surface of the irregular shape. It is characterized by forming a member.

According to a ninth aspect of the present invention, the microlens 16
Is made of inexpensive light-transmissive resin, which is an inexpensive material, and an insulating liquid 15, and the light-transmissive resin unevenness 10 can be manufactured by stamping with a stamper, which is a method suitable for mass production, so that the size is increased. It can be manufactured at a good yield and at low cost.

[0029]

FIG. 1 is a sectional view of a thin film EL panel according to an embodiment of the present invention.

The thin-film EL element 7 of the thin-film EL panel is formed as follows. 200 nm Mo film on glass substrate 1
The Mo film is wet-etched to form a first electrode layer 2 having a striped electrode pattern, and a first insulating layer 3 having a stacked structure of Si ₃ N ₄ and SiO ₂ is formed thereon to a thickness of 200 nm. SrS: Ce
White light emitting layer 4 having a laminated structure of
m, a second insulating layer 5 having a laminated structure of SiO ₂ and Si ₃ N ₄ having a thickness of 200 nm, and an ITO film
The second electrode layer 6 having a stripe electrode pattern is formed so as to be orthogonal to the first electrode layer 2 by wet etching the ITO film.

The first insulating layer 3 and the second insulating layer 5 are made of Ta ₂ O ₅
The or Al ₂ O _3, or the like, the first electrode layer 2 Ta, a metal electrode such as W, ZnO in the second electrode layer 6 with the addition of Al, even using a transparent electrode such as ZnO with the addition of Ga Good.

The white light-emitting layer 4 composed of SrS: Ce and ZnS: Mn was formed by adding 0.1 at% of Ce to SrS, forming the mixture under pressure, and then sintering at 1100 ° C. for 1 hour in Ar gas.
rS: Ce pellets, 0.35 at% of Mn in ZnS
And ZnS: Mn pellets sintered at 900 ° C. for 1 hour in an Ar gas and formed under pressure at a substrate temperature of 500 ° C. and a film thickness of 200 ° C. at a temperature of 200 ° C., respectively.
and a total thickness of 1000 nm of 300 nm.

In the thin-film EL element 7, when a bipolar pulse voltage of about 200 V is applied between the first electrode layer 2 and the second electrode layer 6, blue light is emitted from the SrS: Ce light emitting layer to ZnS:
Yellow light is generated from the Mn light emitting layer, and as a result, the light is emitted as white light, and a thin film EL panel of a so-called inverted structure type that emits light to the sealing glass 8 side of the thin film EL panel, that is, the side opposite to the glass substrate 1 is obtained. On the other hand, a color filter 9 including a red filter 9a, a green filter 9b, and a blue filter 9c patterned to correspond to each pixel is formed on the seal glass 8 by a spin coating method or a printing method. Red, green,
Disperse each in blue.

A method for forming a micro lens will be described below. As shown in FIG. 2A, a transparent negative photosensitive acrylic overcoat material 1.52 having a refractive index of 1.52 is spin-coated or printed on a seal glass 8 on which a color filter 9 is formed. 2B, the pattern drawn on the photomask 19 by photolithography as shown in FIG. 2B is exposed to ultraviolet rays and then developed, as shown in FIG. 2C. The overcoat material was formed into a columnar pattern having a radius of 4 μm and a height of 3 μm, heated and cured at 150 ° C., and further adjusted to a low viscosity as shown in FIG. 2 (d). Is uniformly applied by a spin coating method or a printing method.

When the overcoat material A is heated at a temperature of 70 ° C., the viscosity further decreases, and the corners become round due to surface tension, resulting in a hemispherical convex lens shape composed of the overcoat material A and the overcoat material A. 70 as it is
When it is cured at 150 ° C., it hardens, and when it is cured, it is further baked at 150 ° C. to complete the formation of the irregularities.

Thus, a convex shape 10a made of a high-refractive-index translucent resin having a radius of 10 μm and a height of 5 μm can be formed.

Next, as shown in FIG. 1, the glass substrate 1 on which the thin-film EL element 7 is formed and the sealing glass 8 are bonded together with an epoxy-based sealing resin 14 while maintaining a gap of 30 μm by the spacer 13. A low-refractive-index insulating liquid 15a made of a fluorine compound insulating oil having an optical refractive index of 1.30 is injected from the oil inlet 11 into the thin-film EL panel thus manufactured, and the oil sealing plate is inserted into the oil inlet 11. 12 is adhered and sealed.

The injection of the low-refractive-index insulating liquid 15a is as follows.
First, a thin-film EL panel and a container filled with a low-refractive-index insulating liquid are placed in a vacuum container, and the vacuum container is evacuated to evacuate the air in the gap between the glass substrate 1 and the seal glass 8. When the substrate is immersed in the refractive index insulating liquid and the inside of the vacuum vessel is returned to the atmospheric pressure, the liquid surface of the low refractive index insulating liquid is subjected to the atmospheric pressure, and the space between the glass substrate 1 and the seal glass 8 is in a vacuum state. It is performed by a method in which a low refractive index insulating oil is injected.

The thin-film EL panel manufactured in this manner has a convex shape 10a having a refractive index of 1.52 made of a high refractive index translucent resin having a convex lens shape and a low refractive index insulating material having a refractive index of 1.3. A large number of microlenses 16 are built in the panel per pixel constituted by a refractive index difference of 0.22 with the liquid 15a, so that brightness enhancement and sharp images can be obtained. According to the above-described manufacturing method, EL panels can be manufactured by an inexpensive manufacturing method suitable for mass production.

Another method of manufacturing the convex shape 10a will be described below. As shown in FIG.
A transparent overcoat material is evenly applied to the seal glass 8 on which has been formed by a spin coating method or a printing method.
After being heated and temporarily cured, a stamper 20 in which a desired pattern is cut in advance is applied to the resin application surface to apply a pressing die, and then heated again at 150 ° C. to be completely cured, thereby forming a projection made of a translucent resin. A mold shape 10a can be made.

In this case, the overcoat material need only be transparent and does not require photosensitivity. Particularly, as shown in FIG. 3, the productivity is extremely high when a method of forming an uneven shape by passing a seal glass 8 coated with an overcoat material in a gap between them by a stamping machine including a roller type stamper 20 and a roller 21 as shown in FIG. A large panel can be manufactured well.

Various shapes can be considered for the unevenness of the light-transmitting resin constituting the microlens 16, and can be broadly classified into a convex shape and a concave shape, and a dot shape and a linear shape. When the translucent resin is convex, a hemispherical convex lens shape shown in FIG.
Convex shapes such as a polygonal pyramidal convex prism shape shown in FIG. 4B and a columnar convex lens shape shown in FIG.

When the translucent resin is formed into a convex lens shape, the optical refractive index n of the convex shape 10a made of the translucent resin is used.
1 and the optical refractive index n2 of the insulating liquid 15a is n1> n2
Must be set so as to satisfy the relationship of n1 and n2
The larger the difference is, the more light can be used for display by the microlenses.

For example, a convex shape 10 made of a translucent resin
For a, use an acrylic translucent resin with a high optical refractive index,
As the low refractive index insulating liquid 15a, a fluorine compound insulating oil having a low optical refractive index is used. Table 1 shows the present embodiment in which the convex shape of the translucent resin is provided and the thin film E having the conventional structure shown in FIG.
5 shows the surface luminance ratio of the L panel.

[0045]

[Table 1]

An acrylic translucent resin having an optical refractive index of 1.52 is used for the translucent resin having the convex shape according to the present embodiment, and an optical refraction is used for the insulating liquid of the present embodiment and the conventional structure. A fluorine compound insulating oil having a rate of 1.30 is used. Also,
A quadrangular pyramid is used for the polygonal convex prism.

The voltage applied to the thin film EL element is a light emission starting voltage of 1
60V + drive voltage 40V, 200V, frequency 60H
In the case where all of red, blue, and green are driven by driving with z bipolar pulse voltage, the surface luminance and the surface luminance improvement ratio of the convex shape of the present embodiment when the conventional structure is set to 1.0 are shown. Table 1 shows the results.

When the translucent resin has a columnar convex lens shape, the light condensing effect is exerted only in the direction perpendicular to the columnar structure of the lens, so that the brightness is not significantly improved. By making the shape of a hemispherical convex lens, the light collection efficiency was further improved, and the luminance was greatly improved.

Next, when the translucent resin is concave, a concave shape 10b is used for the thin film EL panel as shown in FIG.
FIG. 5 shows a concave shape 10 instead of the convex shape 10a of FIG.
b is applied.

In the case where the translucent resin is concave, FIG.
A concave shape such as a hemispherical concave lens type shown in (a), a polygonal pyramidal concave prism type shown in FIG. 6B, and a columnar concave lens type shown in FIG. 6C can be used.

Convex shape 10 made of low refractive index translucent resin
For example, a high refractive index insulating liquid 15b is formed of a low refractive index translucent resin using a silicon compound insulating oil having a high optical refractive index as the high refractive index insulating liquid 15b. The optical refractive index n1 of 10b and the high refractive index insulating liquid 15b are set so that the relationship of n1 <n2 is satisfied, and the larger the difference between n1 and n2, the better. Table 2 shows the surface luminance ratio between the embodiment of the present invention in which the concave shape 10b of the translucent resin is provided and the thin film EL panel having the conventional structure shown in FIG. 7A.

[0052]

[Table 2]

A fluororesin having an optical refractive index of 1.34 is used as the translucent resin having the concave shape 10b of the present embodiment, and an optical refractive index of 1.34 is used for the insulating liquid of the present embodiment and the conventional structure. 53 silicon compound insulating oils are used. A quadrangular pyramid was selected for the polygonal concave prism.

Table 2 shows a comparison of the surface luminance when all the red, blue, and green lights were driven by a bipolar pulse voltage having a frequency of 60 Hz, and the applied voltage was 200 V, which is a light emission start voltage 160 V + a drive voltage 40 V.

In the case of the columnar concave lens shape, since the light condensing effect is exerted only in the direction perpendicular to the columnar structure of the lens, the brightness improvement is not so large. When this was formed into a polygonal pyramidal concave prism or a hemispherical concave lens shape, the light-collecting efficiency was further improved and the luminance was greatly improved.

[0056]

According to the present invention, by providing the microlenses 16 composed of the uneven shape 10 made of a translucent resin and the insulating liquid 15 on the thin film EL element 7 side of the color filter 9, the sealing glass has heretofore been obtained. Light that did not exit from the front side 8 from the front side can be taken out in the front side direction, and the luminance can be greatly improved.

When a microlens 16 composed of a concave / convex shape 10 made of a light-transmitting resin and an optical refractive index difference of an insulating liquid 15 is provided on the seal glass 8 on the side of the thin film EL element 7, The distance between the pixel and the microlens 16 can be reduced, so that light from another pixel is prevented from entering the microlens lens 16 corresponding to a certain pixel, and the light from another pixel is emitted by the microlens 16. Since the light bent toward the portion also causes total reflection due to the optical refractive index difference between the seal glass 8 and the outside air, the light cannot be observed by an observer, so that a sharp image without blur can be obtained.

Further, the microlenses 16 are provided inside the panel, and even if the uneven shape 10 made of a translucent resin is formed of a relatively soft material such as a resin, the surface will not be scratched.

Further, since the present invention has a structure in which a number of small lens-shaped irregularities are provided for one pixel and the height is reduced, the height of the microlens 16 is extremely low, and the pixel and lens generated by the height are reduced. Since there is almost no distance between them, a very sharp image can be obtained. Further, according to the present invention, light can be effectively extracted to the display side. Also,
The present invention relates to a case in which a plurality of microlenses are arranged side by side with irregularities having different sizes and widths or uneven intervals at one pixel so that the microlenses are juxtaposed with irregularities having a uniform size and uniform intervals. In addition, it is possible to prevent the occurrence of interference fringes and coloring on the display due to differences in reflectance and light collection efficiency depending on the wavelength of light.

Further, according to the present invention, a microlens 16 composed of a concave-convex shape 10 made of a light-transmitting resin and an optical refractive index difference between an insulating liquid 15 and a color filter 9 is used as a thin film E.
The micro lens 16 is disposed on the L element 7 side, that is, when viewed from an observer, and the micro lens 16 is provided on the back side of the color filter 9. Since the light is transmitted and almost all of the light is absorbed by the color filter 9, the amount of emitted light is small and a decrease in contrast can be prevented.

In the present invention, the microlens 16 is composed of the irregular shape 10 made of an inexpensive light-transmitting resin and the insulating liquid 15, and the microlens 16 is made of a light-transmitting resin.
Can be manufactured by photolithography, which is a method suitable for mass production, so that the size can be increased, the yield can be improved, and the manufacturing can be performed at low cost. In addition, the present invention provides a microlens 16 composed of a concave-convex shape 10 made of an inexpensive light-transmissive resin and an insulating liquid 15, and a microlens 16 made of a light-transmissive resin.
Can be manufactured by engraving with a stamper, which is a method suitable for mass production, so that the size can be increased, the yield can be improved, and the manufacturing can be performed at low cost.

Further, in the present invention, since the microlenses are made of an inexpensive material made of a light-transmitting resin and an insulating liquid, the photolithography is a method suitable for mass production of the light-transmitting resin. Since it can be manufactured by a method such as engraving with a stamper or a stamper, it is possible to provide a method that can be made large in size, has good yield, and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a thin-film EL panel having a convex shape constituting a microlens of the present invention.

FIG. 2 is a cross-sectional view illustrating a method for manufacturing a convex shape according to the present invention.

FIG. 3 is a cross-sectional view illustrating a method for manufacturing a convex shape according to the present invention.

FIG. 4 is a perspective view showing another example of the convex shape of the present invention.

FIG. 5 is a cross-sectional view showing a thin-film EL panel having a concave shape constituting a microlens of the present invention.

FIG. 6 is a perspective view showing another example of the concave shape of the present invention.

FIG. 7 is a cross-sectional view of a thin-film EL panel for comparing the display of the present invention with that of the prior art.

FIG. 8 is a cross-sectional view of a thin-film EL panel for comparing the display of the present invention with that of the prior art.

FIG. 9 is a cross-sectional view of a thin-film EL panel for comparing the display of the present invention with that of the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass substrate 2 First electrode layer 3 First insulating layer 4 Light emitting layer 5 Second insulating layer 6 Second electrode layer 7 Thin film EL element 8 Seal glass 9 Color filter 9a Red filter 9b Green filter 9c Blue filter 10 Translucent resin 10a Convex shape 10a Convex shape 10b Concave shape 11 Oil injection port 12 Oil sealing plate 13 Spacer 14 Sealing resin 15 Insulating liquid 15a Low-refractive-index insulating liquid 15b High-refractive-index insulating liquid 15c Insulating liquid 16 micro Lens 17 Microlens film 18 Microlens 19 Photomask 20 Stamper 21 Roller

Claims (9)

[Claims] An EL panel substrate on which a thin-film EL element is formed and a light-transmitting sealing substrate are adhered so that the thin-film EL element is on the inside, and an insulating material that fills a gap between the EL panel substrate and the sealing substrate. In the thin-film EL panel provided with a liquid, a convex-shaped translucent member is provided on the EL panel substrate side of the seal substrate so as to be in contact with the insulating liquid, and the optical refraction of the convex-shaped translucent member is provided. A thin-film EL panel comprising: a convex-shaped translucent member having a ratio n1 and an optical refractive index n2 of the insulating liquid set to n1>n2; and a microlens made of the insulating liquid. 2. An EL panel substrate on which a thin-film EL element is formed and a light-transmitting seal substrate are bonded so that the thin-film EL element is on the inner side, and an insulating material that fills a gap between the EL panel substrate and the seal substrate. In the thin-film EL panel provided with a liquid, a concave-shaped translucent member is provided on the EL panel substrate side of the seal substrate so as to be in contact with the insulating liquid, and the optical refractive index n1 of the concave-shaped translucent member is provided. A thin-film EL panel comprising: a concave-shaped light-transmitting member having an optical refractive index n2 of the insulating liquid set to n1 <n2; and a microlens made of the insulating liquid. 3. The thin film EL element according to claim 1, wherein a plurality of microlenses made of the translucent member and the insulating liquid are provided for one pixel of the thin film EL element. Thin film EL panel. 4. The thin-film EL panel according to claim 1, wherein the light-transmissive member has a hemispherical or polygonal pyramid-shaped unevenness. 5. The light-transmissive member according to claim 1, wherein the concave and convex shapes are two or more types having different sizes.
The thin-film EL panel according to claim 4. 6. The thin-film EL panel according to claim 1, wherein the light-transmissive member has two or more different shapes having different widths. 7. The thin-film EL panel according to claim 1, wherein a color filter is provided between the translucent member and the seal substrate. 8. An EL panel substrate on which a thin film EL element is formed, a light-transmitting seal substrate, an insulating liquid filling a gap between the EL panel substrate and the seal substrate, and the EL panel substrate of the seal substrate A method of manufacturing a thin-film EL panel including a light-transmitting member having an uneven shape provided on the side thereof in contact with the insulating liquid, and a microlens formed of the light-transmitting member having the uneven shape and the insulating liquid. A method for manufacturing a thin-film EL panel, comprising: forming a light-transmitting resin having a predetermined pattern by photolithography after applying a light-transmitting resin having photosensitivity; and forming the light-transmitting member having the uneven shape. . 9. An EL panel substrate on which a thin film EL element is formed, a light-transmitting seal substrate, an insulating liquid filling a gap between the EL panel substrate and the seal substrate, and the EL panel substrate of the seal substrate A method of manufacturing a thin-film EL panel including a light-transmitting member having an uneven shape provided on the side thereof in contact with the insulating liquid, and a microlens formed of the light-transmitting member having the uneven shape and the insulating liquid. A method for manufacturing a thin-film EL panel, comprising: applying a light-transmitting resin, pressing with a stamper, and forming a pressing die to form the light-transmitting member having the uneven shape.