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 Title: |
US6239778:
Variable light attentuating dichroic dye guest-host device
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Palffy-Muhoray, Peter; Kent, OH
Kosa, Tamas; Kent, OH
Taheri, Bahman; Stow, OH
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| Assignee: |
AlphaMicron, Inc., Kent, OH
other patents from ALPHAMICRON, INC. (783608) (approx. 3)
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| Published / Filed: |
2001-05-29
/ 1998-06-24
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| Application Number: |
US1998000103941
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| IPC Code: |
Advanced:
G02C 7/10;
G02F 1/139;
G02F 1/133;
G02F 1/137;
IPC-7:
G09G 3/36;
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| ECLA Code: |
G02F1/137D; G02C7/10A; S02F1/133D2; S02F1/137B;
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| U.S. Class: |
Current:
345/087;
345/211;
349/033;
Original:
345/087;
345/211;
349/033;
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| Field of Search: |
345/087,88,89,98,100,211,214,207
349/013,14,25,34,35,36,33
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| Government Interest: |
The United States Government has a paid-up license in this invention and may have the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Contract No. F41624-97-C-6010, awarded by the Department of the Air Force.
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| Priority Number: |
| 1998-06-24 |
US1998000103941 |
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| Abstract: |
A cell for the electronic attenuation of light suitable for use in eyewear includes spaced substrates coated with a conducting layer, and preferably a passivation layer and an alignment layer. Disposed between the substrates is a guest-host solution comprising a host material and a light-absorbing dichroic dye guest. A power circuit is provided with a power supply connected to the conducting layers. Adjustment of the power supply alters the orientation of the host material which in turn alters the orientation of the dichroic dye. Light is absorbed by the dichroic dye, depending upon its orientation without the need for polarizers.
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| Attorney, Agent or Firm: |
Renner, Kenner, Grieve, Bobak, Taylor & Weber ;
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| Primary / Asst. Examiners: |
Wu, Xiao;
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| INPADOC Legal Status: |
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| Designated Country: |
AL AM AP AT AZ BA BB BG BR BY CA CH CN CU CZ DK EA EE ES FI GD GE GH GM HR HU ID IL IN IS JP KE KG KP DE FR GB IT
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| Family: |
Show 7 known family members
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First Claim:
Show all 26 claims |
What is claimed is:
1. A variable light attenuating dichroic dye guest-host device for variably attenuating at least two polarization components of impinging light comprising:
- a pair of opposed substrates, each said substrate having a conducting layer facing the other substrate;
- a host solution having a guest dichroic dye dispersed therethrough to form a guest-host solution received between said substrates; and
- a power circuit having a variable voltage supply connected to said conducting layers, wherein adjustment of said variable voltage supply alters the polarization sensitivity and light transmission properties of the cell by adjusting the orientation of said host solution and dichroic dye such that one polarization component of the impinging light can be variably absorbed at a different rate than another polarization component of the impinging light.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 41 U.S. patent(s) that reference this one
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