Display device and display unit using the same
First Claim
Patent Images
1. A display device comprising:
- a light-emitting layer between a first electrode and a second electrode; and
a resonator structure resonating light generated in the light-emitting layer between a first end portion and a second end portion,wherein an optical distance L1 between the first end portion and a maximum light-emitting position of the light-emitting layer satisfies Mathematical Formula 1,
L1=tL1+a1,
(Mathematical Formula
1)where (2tL1)/λ
=−
Φ
1/(2π
)+m1, andwhere tL1 represents an optical distance between the first end portion and the maximum light-emitting position, a1 represents a correction amount based upon a light-emitting distribution in the light-emitting layer, λ
represents a peak wavelength of the spectrum of light desired to be extracted, Φ
1 represents a phase shift of reflected light generated in the first end portion, and m1 is 0 or an integer,wherein an optical distance L2 between the second end portion and the maximum light-emitting position of the light-emitting layer satisfies Mathematical Formula 2,
L2=tL2+a2, (Mathematical Formula
2)where (2tL2)/λ
=−
Φ
2/(2π
)+m2, andwhere tL2 represents an optical distance between the second end portion and the maximum light-emitting position, a2 represents a correction amount based upon a light-emitting distribution in the light-emitting layer, λ
represents a peak wavelength of the spectrum of light desired to be extracted, Φ
2 represents a phase shift of reflected light generated in the second end portion, and m2 is 0 or an integer,wherein a distance L between the first end portion and the second end portion equals the sum of the distance L1 and the distance L2,wherein the correction amount a1 satisfies Mathematical Formula 3,
a1=b(logc(s)),
(Mathematical Formula
3)where b is a value within a range of 2n≦
b≦
6n in the case where the light-emitting distribution in the light-emitting layer extends from the maximum light-emitting position to the first electrode, or a value within a range of −
6n≦
b≦
−
2n in the case where the light emitting distribution extends from the maximum light-emitting position to the second electrode, s represents a physical value (1/e decay distance) relating to the light-emitting distribution in the light-emitting layer, n is an average refractive index between the first end portion and the second end portion in the peak wavelength λ
of the spectrum of light desired to be extracted, andwherein the correction amount a2 satisfies Mathematical Formula 4,
a2=−
a1
(Mathematical Formula
4).
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Abstract
Provided are a display device and a display unit having higher light extraction efficiency. An optical distance L1 between a maximum light-emitting position of a light-emitting layer and a first end portion satisfies L1=tL1+a1 and (2tL1)/λ=−Φ1/(2π)+m1. An optical distance L2 between the maximum light-emitting position and a second end portion satisfies L2=tL2+a2 and (2tL2)/λ=−Φ2/(2π)+m2. In the formulas, tL1 and tL2 represent a theoretical optical distance between the first end portion and the maximum light-emitting position and a theoretical optical distance between the second end portion and the maximum light-emitting position, respectively, a1 and a2 represent correction amounts based upon a light-emitting distribution in the light-emitting layer, λ represents a peak wavelength of the spectrum of light desired to be extracted, Φ1 and Φ2 represent a phase shift of reflected light generated in the first end portion and a phase shift of reflected light generated in the second end portion, respectively, and each of m1 and m2 is 0 or an integer.
23 Citations
4 Claims
-
1. A display device comprising:
-
a light-emitting layer between a first electrode and a second electrode; and a resonator structure resonating light generated in the light-emitting layer between a first end portion and a second end portion, wherein an optical distance L1 between the first end portion and a maximum light-emitting position of the light-emitting layer satisfies Mathematical Formula 1,
L1=tL1+a1,
(Mathematical Formula
1)where (2tL1)/λ
=−
Φ
1/(2π
)+m1, andwhere tL1 represents an optical distance between the first end portion and the maximum light-emitting position, a1 represents a correction amount based upon a light-emitting distribution in the light-emitting layer, λ
represents a peak wavelength of the spectrum of light desired to be extracted, Φ
1 represents a phase shift of reflected light generated in the first end portion, and m1 is 0 or an integer,wherein an optical distance L2 between the second end portion and the maximum light-emitting position of the light-emitting layer satisfies Mathematical Formula 2,
L2=tL2+a2, (Mathematical Formula
2)where (2tL2)/λ
=−
Φ
2/(2π
)+m2, andwhere tL2 represents an optical distance between the second end portion and the maximum light-emitting position, a2 represents a correction amount based upon a light-emitting distribution in the light-emitting layer, λ
represents a peak wavelength of the spectrum of light desired to be extracted, Φ
2 represents a phase shift of reflected light generated in the second end portion, and m2 is 0 or an integer,wherein a distance L between the first end portion and the second end portion equals the sum of the distance L1 and the distance L2, wherein the correction amount a1 satisfies Mathematical Formula 3,
a1=b(logc(s)),
(Mathematical Formula
3)where b is a value within a range of 2n≦
b≦
6n in the case where the light-emitting distribution in the light-emitting layer extends from the maximum light-emitting position to the first electrode, or a value within a range of −
6n≦
b≦
−
2n in the case where the light emitting distribution extends from the maximum light-emitting position to the second electrode, s represents a physical value (1/e decay distance) relating to the light-emitting distribution in the light-emitting layer, n is an average refractive index between the first end portion and the second end portion in the peak wavelength λ
of the spectrum of light desired to be extracted, andwherein the correction amount a2 satisfies Mathematical Formula 4,
a2=−
a1
(Mathematical Formula
4). - View Dependent Claims (2)
-
-
3. A display unit comprising:
-
a display device comprising a light-emitting layer between a first electrode and a second electrode, and a resonator structure resonating light generated in the light-emitting layer between a first end portion and a second end portion, wherein an optical distance L1 between the first end portion and a maximum light-emitting position of the light-emitting layer satisfies Mathematical Formula 1,
L1=tL1+a1,
(Mathematical Formula
1)where (2tL1)λ
/=−
Φ
1/(2π
)+m1, andwhere tL1 represents an optical distance between the first end portion and the maximum light-emitting position, a1 represents a correction amount based upon a light-emitting distribution in the light-emitting layer, λ
represents a peak wavelength of the spectrum of light desired to be extracted, Φ
1 represents a phase shift of reflected light generated in the first end portion, and m1 is 0 or an integer,wherein an optical distance L2 between the second end portion and the maximum light-emitting position of the light-emitting layer satisfies Mathematical Formula 2,
L2=tL2+a2,
(Mathematical Formula
2)where (2tL2)/λ
=−
Φ
2/(2π
)+m2, andwhere tL2 represents an optical distance between the second end portion and the maximum light-emitting position, a2 represents a correction amount based upon a light-emitting distribution in the light-emitting layer, λ
represents a peak wavelength of the spectrum of light desired to be extracted, Φ
2 represents a phase shift of reflected light generated in the second end portion, and m2 is 0 or an integer,wherein a distance L between the first end portion and the second end portion equals the sum of the distance L1 and the distance L2, wherein the correction amount a1 satisfies Mathematical Formula 3,
a1=b(logc(s)),
(Mathematical Formula
3)where b is a value within a range of 2n≦
b≦
6n in the case where the light-emitting distribution in the light-emitting layer extends from the maximum light-emitting position to the first electrode, or a value within a range of −
6n≦
b≦
−
2n in the case where the light emitting distribution extends from the maximum light-emitting position to the second electrode, s represents a physical value (1/e decay distance) relating to the light-emitting distribution in the light-emitting layer, n is an average refractive index between the first end portion and the second end portion in the peak wavelength λ
of the spectrum of light desired to be extracted, andwherein the correction amount a2 satisfies Mathematical Formula 4,
a2=−
a1
(Mathematical Formula
4). - View Dependent Claims (4)
-
Specification
-
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Current AssigneeSony Corporation (Sony Group Corp.)
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Original AssigneeSony Corporation (Sony Group Corp.)
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InventorsYamada, Jiro, Tamura, Shinichiro, Asai, Nobutoshi
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Primary Examiner(s)Guharay; Karabi
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Application NumberUS10/672,962Publication NumberTime in Patent Office1,341 DaysField of Search313/504, 313/506, 313/110US Class Current313/504CPC Class CodesH10K 50/852 comprising a resonant cavit...H10K 59/35 comprising red-green-blue [...H10K 59/38 comprising colour filters o...H10K 59/876 comprising a resonant cavit...
