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EP0028147A1
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EP
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Electro-optical light transmission controlling panel
Assignee: AGC Inc
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Filing: 1980-10-24
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Granted: —
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Expires: 2000-10-24
Abstract
Abstract Infra-red reflecting electrochromic light-controlling panel comprising, successively in a laminated structure, a first transparent plate (1) of glass or plastics, a transparent electroconductive film (2), an interlayer (3) of a polymer electrolyte, a first tungsten oxide film (4), an infra-red reflecting and electroconductive metal film (5), a second tungsten oxide film (6) and a second transparent plate (7). The first tungsten oxide film (4) is colored when a negative voltage is applied across it. The panel can be used as an infra-red reflecting window which regulates the transmission of visible light and solar energy by applying an electric field to the first tungsten oxide film. The voltage applied can be varied in response to changes in the intensity of incident light.
Inventors
- 👤 Tadatoshi Kamimori
- 👤 Mamoru Mizuhashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 04:34
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/10431; B32B17/10467; B32B17/10495; B32B17/10513; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524; G02F1/1525; E; E06; E06B; E06B9/00; E06B9/24; E06B2009/2464; G02F1/153; G02F1/155; G02F2001/1552
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
1) An infra-red reflecting and electrochromic light controlling panel in the form of a laminate which comprises a transparent glass or plastics plate (1), a transparent electroconductive film (2) laminated on said plate, a second electroconductive film (5) and a tungsten oxide film (4) between said electroconductive film, characterised in that a first transparent plate (1) made of glass or plastics; a transparent electroconductive film (2); an interlayer film (3) made of a polyelectrolyte; a first tungsten oxide film (4), an infra-red reflecting and electroconductive metal film (5), a second tungsten oxide film (6) and a transparent plate (7) made of glass or plastics are laminated in that order; and in that a device (8) for applying a potential between the transparent electroconductive film (2) and said infra-red reflecting and electroconductive metal film (5) whereby light transmission is controlled by applying a positive or negative potential across said first tungsten oxide film (4).
Claim 2
Dependent Claim
153 words
1) An infra-red reflecting and electrochromic light controlling panel in the form of a laminate which comprises a transparent glass or plastics plate (1), a transparent electroconductive film (2) laminated on said plate, a second electroconductive film (5) and a tungsten oxide film (4) between said electroconductive film, characterised in that a first transparent plate (1) made of glass or plastics; a transparent electroconductive film (2); an interlayer film (3) made of a polyelectrolyte; a first tungsten oxide film (4), an infra-red reflecting and electroconductive metal film (5), a second tungsten oxide film (6) and a transparent plate (7) made of glass or plastics are laminated in that order; and in that a device (8) for applying a potential between the transparent electroconductive film (2) and said infra-red reflecting and electroconductive metal film (5) whereby light transmission is controlled by applying a positive or negative potential across said first tungsten oxide film (4).
Claim 3
Dependent Claim
26 words
2) A panel according to Claim 1 characterised in that said transparent electroconductive film (2) is made of In 2 0 3 and/or Sn0 2 .
Claim 4
Dependent Claim
25 words
3) A panel according to Claim 1 or Claim 2 characterised in that said interlayer film (3) is made of polyvinyl butyral or polyacrylic acid.
Claim 5
Dependent Claim
40 words
4) A panel according to any preceding Claim characterised in that said infra-red reflecting film (5) o has a thickness of 100 to 300 A and is made of Ag, Cu, Al, Au, Ti or Sn or an alloy thereof.
Claim 6
Dependent Claim
35 words
5) A panel according to any preceding Claim wherein each of said first and second tungsten o oxide films (4,6) has a thickness of 100 to 700 A or o 1500 to 1900 A .
References Cited (Backward Citations)
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