US4303310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic display device
Assignee: Toshiba Corp
•
Filing: 1979-06-04
•
Granted: 1981-12-01
•
Expires: 1999-06-04
Abstract
Abstract An electrochromic display device comprises a display electrode, a counter electrode spaced from the display electrode, an electrolyte filled in the space between the display electrode and the counter electrode, and an electrochromic coloring layer formed on the display electrode to constitute a display section. That surface of the coloring layer which contacts the electrolyte has a higher density than that of the remaining portion. Preferably, both surface portions of the coloring layer which contact the electrolyte and the display electrode, respectively are more dense than the remaining portion.
Inventors
- 👤 Hiroshi Morita
- 👤 Hiroshi Washida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:33
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
103 words
An electrochromic display device comprising: a display electrode; an electrochromic coloring layer formed on the display electrode to constitute a display section and having a first surface portion in contact with the display electrode and a second surface portion; a counter electrode spaced from the display electrode; and an electrolyte within the space between the display section and the counter electrode, the electrolyte being in contact with the second surface portion of the electrochromic coloring layer; the second surface portion of said coloring layer which contacts the electrolyte having a higher density than that of the remaining portion of the electrochromic coloring layer.
Claim 2
Dependent Claim
103 words
An electrochromic display device comprising: a display electrode; an electrochromic coloring layer formed on the display electrode to constitute a display section and having a first surface portion in contact with the display electrode and a second surface portion; a counter electrode spaced from the display electrode; and an electrolyte within the space between the display section and the counter electrode, the electrolyte being in contact with the second surface portion of the electrochromic coloring layer; the second surface portion of said coloring layer which contacts the electrolyte having a higher density than that of the remaining portion of the electrochromic coloring layer.
Claim 3
Dependent Claim
46 words
An electrochromic display device according to claim 1, wherein the first surface portion of the electrochromic coloring layer which contacts the display electrode has a higher density than the remaining portion of the electrochromic coloring layer excluding the second surface portion thereof which contacts the electrolyte.
Claim 4
Dependent Claim
41 words
An electrochromic display device according to claim 1, wherein the electrochromic coloring layer comprises a first layer of a low density and a second layer formed on the first layer and having a higher density than that of the first layer.
Claim 5
Dependent Claim
60 words
An electrochromic display device according to claim 2, wherein the electrochromic coloring layer comprises a first layer having a high density, a second layer formed on the first layer and having a lower density than that of the first layer and a third layer formed on the second layer and having a higher density than that of the second layer.
Claim 6
Dependent Claim
28 words
An electrochromic display device according to claim 1 or 2, wherein the electrochromic coloring layer has a density which changes progressively from one surface thereof to the other.
Claim 7
Dependent Claim
20 words
An electrochromic display device according to claim 1 or 2, wherein the electrochromic coloring layer is made of tungsten trioxide.
Claim 8
Dependent Claim
18 words
An electrochromic display device according to claim 1 or 2, wherein the electrolyte comprises a lithium perchlorate solution.
Claim 9
Dependent Claim
127 words
An electrochromic display device comprising: a display electrode; a counter electrode spaced from the display electrode; an electrolyte filled in the space between the display electrode and the counter electrode; and an electrochromic coloring layer formed on the display electrode to constitute a display section, and having a surface portion in contact with the electrolyte and a surface portion in contact with the display electrode; that surface portion of the electrochromic coloring layer which contacts the electrolyte having a higher density than that of the remaining portion of the electrochromic coloring layer; that surface portion of said electrochromic coloring layer which contacts the display electrode having a higher density than the remaining portion of the electrochromic coloring layer excluding said surface portion thereof which contacts the electrolyte.
Claim 10
Dependent Claim
127 words
An electrochromic display device comprising: a display electrode; a counter electrode spaced from the display electrode; an electrolyte filled in the space between the display electrode and the counter electrode; and an electrochromic coloring layer formed on the display electrode to constitute a display section, and having a surface portion in contact with the electrolyte and a surface portion in contact with the display electrode; that surface portion of the electrochromic coloring layer which contacts the electrolyte having a higher density than that of the remaining portion of the electrochromic coloring layer; that surface portion of said electrochromic coloring layer which contacts the display electrode having a higher density than the remaining portion of the electrochromic coloring layer excluding said surface portion thereof which contacts the electrolyte.
Claim 11
Dependent Claim
44 words
The electrochromic display device according to claim 8, wherein said electrochromic coloring layer of said display section comprises a first layer of a first density and a second layer of a second density higher than said first density formed on the low density layer.
Claim 12
Dependent Claim
47 words
The electrochromic display device according to claim 8, wherein said electrochromic coloring layer is constituted by a layer of a high density, a layer of a low density formed on the high density layer and a layer of a high density formed on the low density layer.
Claim 13
Dependent Claim
25 words
The electrochromic display device according to claim 8, wherein said electrochromic coloring layer has a density which changes progressively from one surface to the other.
Claim 14
Dependent Claim
18 words
The electrochromic display device according to claim 8, wherein said electrochromic coloring layer is made of tungsten trioxide.
Claim 15
Dependent Claim
16 words
The electrochromic display device according to claim 8, wherein said electrolyte comprises a lithium perchlorate solution.
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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |