Electrochrome mirror

• US 6,280,041 B1
• Filed: 05/08/2000
• Issued: 08/28/2001
• Est. Priority Date: 08/30/1997
• Status: Expired due to Fees

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Unger, Falko von, Grosskopf, Klaus
• Primary Examiner(s): NGUYEN, THONG Q
• Application Number:
  US09/486,328
• Time in Patent Office: 477 Days
• Field of Search: 359/601-609, 359/614, 359/245, 359/247, 359/254, 359/265-274, 349/139, 349/147-148
• US Class Current: 359/604
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells

Abstract

Electrochromic mirrors have, as a central component, an optically active cell which comprises two plates (1, 2) which are arranged in a laminate-like fashion and which are provided in each case on the inside with a planar electrode between which an electrochromic medium (5) is located and which are connected to one another in a sealed fashion by means of a bead (6) of adhesive which runs around the edge region of the plates (1, 2) and leaves a narrow edge strip exposed. In order to ensure a secure attachment of connecting wires (8a, 8b) which does not change the dimensions of the mirror, each edge strip of the planar electrodes is divided in half into an insulated edge-strip section (11a, 11b) by means of a separating trench (9a, 9b) such that in each case the insulated edge section lies opposite with the non-insulated edge section of the other surface electrode. In each case a connecting wire (8a, 8b) is embedded in the intermediate space between these edge-strip sections by means of an electrically conductive material.

Claims

1. Electrochromic mirror having an optically active cell comprising a front transparent plate and a rear transparent plate which are arranged in a laminate-like fashion, each having an upper half and a lower half, and

which plates are each provided, on that side which faces the other plate, with an electrically conductive electrode layer which extends over the entire surface of said side of said plate and with which contact is made in each case with a contact wire

of which the rear plate is of mirrored design, which plates are connected to one another in a sealed fashion by means of a bead of adhesive which runs around each plate adjacent to the edges thereof and leaves a narrow edge strip exposed, and

between which an electrochromic medium is arranged,

wherein, on one of said plates, in the associated electrode layer on the lower half thereof and on the other of said plates in the associated electrode layer in the upper half thereof, there is formed a separating trench which is covered by said bead and prescribes an insulated edge-strip section in the respective electrode layers, and wherein one contact wire is embedded in the space between the one insulated edge-strip section and the non-insulated edge-strip section on the electrode layer lying opposite, and the second contact wire is embedded between the other insulated edge-strip section and the non-insulated edge-strip section on the electrode layer lying opposite, in each case, by means of an electrically conductive material.

2. Mirror according to claim 1, wherein the separating trench is formed in each case by means of a laser beam.

3. Mirror according to claim 1, wherein both electrode layers are made of indium tin oxide (ITO) and a mirrored layer is additionally applied to that side of the rear plate which faces away from the front plate.

4. Mirror according to claim 1, wherein the electrode layer which is applied to the front plate is made of indium tin oxide (ITO), and the second electrode layer which is applied to the rear plate is made of a chrome/rhodium compound.

5. Mirror according to claim 1, wherein the bead of adhesive contains glass beads with a diameter which corresponds to a predetermined distance between the plates of the cell.

6. Mirror according to claim 1, wherein the electrically conductive material in which the contact wires are embedded is a hard-setting conductive varnish.

7. Mirror according to claim 1, wherein the electrically conductive material in which the contact wires are embedded is a setting conductive solder.

8. Mirror according to claim 1, wherein the connecting wires are embedded in the electrically conductive material in each case over the entire length of the associated, non-insulated edge section.

9. Mirror according to claim 1, wherein said plates each have a top side, a bottom side and two edge sides and wherein the end sides of the plates of the optically active cell are sealed with an insulating and hard-setting material.

10. Mirror according to claim 1, wherein the plates of the optically active cell are made of float glass.