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US4737018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device having anti-reflective electrodes and/or insulating film
Assignee: Seiko Epson Corp
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Filing: 1986-01-30
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Granted: 1988-04-12
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Expires: 2006-01-30
Abstract
Abstract A display device including a pair of opposed substrates at least one of which is transparent with a display medium layer therebetween, and a transparent electrode arranged on the internal surface of the transparent substrate is provided. The thickness of the transparent electrode is about (5500/(2×n))Å wherein n represents the refractive index thereof. When a transparent insulating film is formed on the transparent electrode, the thickness of the transparent insulating film is about (5500/(2×m)Å wherein m represents the refractive index thereof. When the refractive index of n 1 of the transparent insulating film is substantially equal to the refractive index n 2 of the transparent electrode, the value, 2×(n 1 ×d 1 +n 2 ×d 2 ) equals about 5500Å wherein d 1 represents the thickness of the transparent insulating film and d 2 the thickness of the transparent electrode.
Inventors
- 👤 Yukihiro Iwashita
- 👤 Koji Sumi
- 👤 Koichi Kamijo
- 👤 Hideaki Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133502; G02F1/1343; G02F1/13439; G02F1/133345
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
66 words
A display device comprising: a pair of opposed spaced apart substrates at least one of which is transparent; an electrode disposed on the interior surface of each of the substrates, the electrode on the transparent substrate being itself transparent; a display material enclosed between the substrates; and wherein the transparent electrode is about (5500/(2×n)) Å thick, wherein n is the refractive index of the transparent electrode.
Claim 2
Dependent Claim
66 words
A display device comprising: a pair of opposed spaced apart substrates at least one of which is transparent; an electrode disposed on the interior surface of each of the substrates, the electrode on the transparent substrate being itself transparent; a display material enclosed between the substrates; and wherein the transparent electrode is about (5500/(2×n)) Å thick, wherein n is the refractive index of the transparent electrode.
Claim 3
Dependent Claim
14 words
The display device of claim 1, wherein the display material is an electro-optical material.
Claim 4
Dependent Claim
14 words
The display device of claim 1, wherein the display material is an electro-chromic material.
Claim 5
Dependent Claim
15 words
The display device of claim 1, wherein the display material is a liquid crystal material.
Claim 6
Dependent Claim
28 words
The display device of claim 4, wherein the liquid crystal material has a refractive index of 1.53 in the short axis direction and a birefringent index of 0.21.
Claim 7
Dependent Claim
17 words
The display device of claim 1, further including a transparent insulating film formed on the transparent electrode.
Claim 8
Dependent Claim
18 words
The display device of claim 1, wherein the transparent substrate is soda lime glass coated with silicon dioxide.
Claim 9
Dependent Claim
25 words
The display device of claim 7, wherein the transparent electrode is an indium oxide and tin oxide film having a refractive index, n, of 1.8.
Claim 10
Dependent Claim
18 words
The display device of claim 8, wherein the indium oxide and tin oxide film is deposited by sputtering.
Claim 11
Dependent Claim
27 words
The display device of claim 7, wherein the transparent electrode is tin oxide doped with antimony oxide and the refractive index of the transparent electrode is 2.2.
Claim 12
Dependent Claim
21 words
The display device of claim 1, wherein the transparent substrate is soda lime glass having a refractive index, n, of 1.52.
Claim 13
Dependent Claim
25 words
The display device of claim 11, wherein the transparent electrode is an indium oxide and tin oxide film having a refractive index, n, of 1.8.
Claim 14
Dependent Claim
17 words
The display device of claim 12, further including a transparent insulating film disposed on the transparent electrode.
Claim 15
Dependent Claim
20 words
The display device of claim 13, wherein the transparent insulating film is silicon dioxide having a refractive index of 1.45.
Claim 16
Dependent Claim
26 words
The display device of claim 14, wherein both the indium oxide and tin oxide film and the silicon dioxide transparent insulating film are formed by sputtering.
Claim 17
Dependent Claim
21 words
The display device of claim 13, wherein the transparent insulating film is a polyimide resin having a refractive index of 1.7.
Claim 18
Dependent Claim
36 words
The display device of claim 13, wherein the transparent insulating film is 50% by weight of silicon dioxide and 50% by weight of tantalum pentaoxide and the transparent insulating film has a refractive index of 1.7.
Claim 19
Dependent Claim
117 words
A display device comprising: a pair of opposed substrates having electrodes formed on the interior surfaces thereof, at least one of the substrates being transparent; a display medium layer between the substrates; a transparent electrode formed on the internal surface of the transparent substrate; a transparent insulating film formed on the transparent electrode selected so that the refractive index n 1 of the transparent insulating film is substantially identical to the refractive index n 2 of the transparent electrode and the value of 2×(n 1 ×d 1 +n 2 ×d 2 ) is about 5500 Å, wherein d 1 represents the thickness of the transparent insulating film and d 2 represents the thickness of the transparent electrode.
Claim 20
Dependent Claim
117 words
A display device comprising: a pair of opposed substrates having electrodes formed on the interior surfaces thereof, at least one of the substrates being transparent; a display medium layer between the substrates; a transparent electrode formed on the internal surface of the transparent substrate; a transparent insulating film formed on the transparent electrode selected so that the refractive index n 1 of the transparent insulating film is substantially identical to the refractive index n 2 of the transparent electrode and the value of 2×(n 1 ×d 1 +n 2 ×d 2 ) is about 5500 Å, wherein d 1 represents the thickness of the transparent insulating film and d 2 represents the thickness of the transparent electrode.
Claim 21
Dependent Claim
17 words
The display device of claim 18, wherein the display medium layer is formed of an electro-optical material.
Claim 22
Dependent Claim
17 words
The display device of claim 18, wherein the display medium layer is formed of an electro-chromic material.
Claim 23
Dependent Claim
18 words
The display device of claim 18, wherein the display medium layer is formed of a liquid crystal material.
Claim 24
Dependent Claim
28 words
The display device of claim 21, wherein the liquid crystal material has a refractive index of 1.53 in the short axis direction and a birefringent index of 0.21.
Claim 25
Dependent Claim
18 words
The display device of claim 18, wherein the transparent substrate is soda lime glass coated with silicon dioxide.
Claim 26
Dependent Claim
26 words
The display device of claim 23, wherein the transparent electrode is an indium oxide and the tin oxide film having a refractive index, n, of 1.8.
Claim 27
Dependent Claim
18 words
The display device of claim 24, wherein the indium oxide and tin oxide film is deposited by sputtering.
Claim 28
Dependent Claim
20 words
The display device of claim 24, wherein the transparent insulating film is silicon dioxide having a refractive index of 1.45.
Claim 29
Dependent Claim
27 words
The display device of claim 26, wherein both the indium oxide and tin oxide electrode film and the silicon dioxide transparent insulating film are formed by sputtering.
Claim 30
Dependent Claim
27 words
The display device of claim 23, wherein the transparent electrode is tin oxide doped with antimony oxide and the refractive index of the transparent electrode is 2.2.
Claim 31
Dependent Claim
21 words
The display device of claim 18, wherein the transparent substrate is soda lime glass having a refractive index, n, of 1.52.
Claim 32
Dependent Claim
22 words
The display device of claim 29, wherein the transparent electrode is an indium oxide film having a refractive index, n, of 1.8.
Claim 33
Dependent Claim
21 words
The display device of claim 18, wherein the transparent insulating film is a polyimide resin having a refractive index of 1.7.
Claim 34
Dependent Claim
32 words
The display device of claim 18, wherein the transparent insulating film is 50% by weight of silicon dioxide and 50% by weight of tantalum pentaoxide and has a refractive index of 1.7.
Claim 35
Dependent Claim
66 words
A transparent substrate assembly for use in a display device having two substrates at least one of which is transparent positioned in a parallel spaced relationship and a display material therebetween, comprising: a transparent substrate; and a transparent electrode disposed on the surface of the substrate, wherein the transparent electrode has a thickness of (5500/2×n)) Å, wherein n is the refractive index of the transparent electrode.
Claim 36
Dependent Claim
66 words
A transparent substrate assembly for use in a display device having two substrates at least one of which is transparent positioned in a parallel spaced relationship and a display material therebetween, comprising: a transparent substrate; and a transparent electrode disposed on the surface of the substrate, wherein the transparent electrode has a thickness of (5500/2×n)) Å, wherein n is the refractive index of the transparent electrode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |