Display unit and manufacturing method thereof
View Patent ↗A display unit in which viewing angle characteristics such as color shift and luminance unevenness depending on the viewing angle are improved and a manufacturing method thereof are provided. A display unit includes a driving panel having a plurality of light emitting devices arranged in a grid on a device substrate, a sealing panel including a sealing substrate, and a transparent resin layer which is sandwiched between the sealing panel and the driving panel. The transparent resin layer has a thickness L 1 satisfying Mathematical formula 1 L 1 ≤ { ( L PITCH - L CF ) + ( L CF - L EL ) / 2 } + HK tan { sin - 1 ( 1 n ) } .
1. A display unit comprising:
a driving panel having a plurality of light emitting devices arranged in a grid on a device substrate;
a sealing panel including a sealing substrate; and
a transparent resin layer which is sandwiched between the sealing panel and the driving panel and has a thickness L 1 satisfying Mathematical formula 1
L
1
≤
{
(
L
PITCH
-
L
CF
)
+
(
L
CF
-
L
EL
)
/
2
}
+
HK
tan
{
sin
-
1
(
1
n
)
}
wherein,
L PITCH is a length between the center of a first black matrix located between a first color filter and a second color filter and the center of a second black matrix located between the second color filter and a third color filter,
L CF is a length of a color filter,
L EL is a length of an organic layer,
H is a point at the end of an organic light emitting device corresponding to the second color filter that is adjacent to the an organic light emitting device corresponding to said first color filter,
K is a point at the opposite end of the organic light emitting device where H is located, and
n is a refractive index of the transparent resin layer.
2. A display unit according to claim 1 , wherein the driving panel:
red, green, and blue light emitting devices arranged in a first direction of the grid,
concolorous light emitting devices arranged in a second direction of the grid,
red, green, and blue color filters arranged in the first direction of the grid in the sealing panel, and
concolorous color filters arranged in the second direction of the grid correspondingly to the position where the light emitting devices are arranged.
3. A display unit according to claim 1 , wherein:
the plurality of light emitting devices in the driving panel are white light emitting devices,
red, green, and blue color filters are arranged in the sealing panel in a first direction of the grid, and
concolorous color filters are arranged in a second direction of the grid correspondingly to the position where the light emitting devices are arranged.
4. A display unit according to claim 1 , wherein:
the plurality of light emitting devices in the driving panel are blue light emitting devices,
red conversion films, green conversion films, and blue light transmission regions are arranged in a first direction of the grid in the sealing panel, and concolorous conversion films or transmission regions are arranged in a second direction of the grid correspondingly to the position where the blue light emitting devices are arranged.
5. A display unit according to claim 1 , wherein:
the light emitting device in the driving panel includes two or more layered light emitting units,
an insulating charge generation layer between the light emitting units,
red, green, and blue color filters are arranged in a first direction of the grid in the sealing panel and
concolorous color filters are arranged in a second direction of the grid correspondingly to the position where the light emitting devices are arranged.
6. A display unit according to claim 1 , wherein a difference in thickness between the thinnest portion and the thickest portion of the transparent resin layer is 10 μm or less.
7. A display unit according to claim 1 , wherein a refractive index of the transparent resin layer is from 1.3 to 2.2.
8. A display unit according to claim 1 , wherein an in-plane color difference of the sealing panel is in the range of Δ u′v′ ≦0.006 in the CIE (Capillary Ion Elecrophoresis) chromaticity diagram.
9. A method of manufacturing a display unit comprising the steps of:
bonding a driving panel having a plurality of light emitting devices arranged in a grid on a device substrate and a sealing panel including a sealing substrate with a transparent resin layer inbetween,
adhering the driving panel and the sealing panel with the transparent resin layer so that the transparent resin layer has a thickness L 1 satisfying Mathematical formula 1
L
1
≤
{
(
L
PITCH
-
L
CF
)
+
(
L
CF
-
L
EL
)
/
2
}
+
HK
tan
{
sin
-
1
(
1
n
)
}
wherein,
L PITCH is a length between the center of a first black matrix located between a first color filter and a second color filter and the center of a second black matrix located between the second color filter and a third color filter,
L CF is a length of a color filter,
L EL is a length of an organic layer,
H is a point at the end of an organic light emitting device corresponding to the second color filter that is adjacent to the an organic light emitting device corresponding to said first color filter,
K is a point at the opposite end of the organic light emitting device where H is located, and
n is a refractive index of the transparent resin layer.
10. A method of manufacturing a display unit according to claim 9 , wherein:
the driving panel includes a step of arranging red, green, and blue light emitting devices in a first direction of the grid, and arranging concolorous light emitting devices in a second direction of the grid on the device substrate, and
the sealing panel includes a step of arranging red, green, and blue color filters in the first direction of the grid, and arranging concolorous color filters in the second direction of the grid correspondingly to the position where the light emitting devices are arranged.
11. A method of manufacturing a display unit according to claim 9 , wherein:
the driving panel includes a step of forming a plurality of light emitting devices capable of emitting white light on the device substrate, and
the sealing panel includes a step of arranging red, green, and blue color filters in a first direction of the grid, and arranging concolorous color filters in a second direction of the grid correspondingly to the position where the light emitting devices are arranged.
12. A method of manufacturing a display unit according to claim 9 , wherein:
the driving panel includes a step of forming a plurality of light emitting devices capable of emitting blue light, and
the sealing panel includes a step of arranging red conversion films, green conversion films, and blue light transmission regions in a first direction of the grid and arranging concolorous conversion films or transmission regions in a second direction of the grid correspondingly to the position where the light emitting devices are arranged.
13. A method of manufacturing a display unit according to claim 9 , wherein:
the light emitting devices include a step of layering (a) a first light emitting unit on the device substrate, (b) an insulating charge generation layer on the first light emitting unit and (c) a second light emitting unit on the insulating charge generation layer at least once, and
the sealing panel includes a step of arranging red, green, and blue color filters in a first direction of the grid, and arranging concolorous color filters in a second direction of the grid correspondingly to the position where the light emitting devices are arranged.