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Document Number
US Patent 4720704
Issued Date
January 19, 1988
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Inventors
Baeger; Holm (Schwalbach,DE)
Map
Abstract
A display for displaying variable and permanent data. It has two support plates 1 and 2 which form between themselves a chamber 3 in which a fluid which can be switched between optically different states is arranged. Polarizers are arranged on the sides of the support plates 1 and 2 which face away from the chamber 3. In the region of permanent data, transparent elements 14 are present between the support plates 1 and 2. Furthermore, a source of light 15 is arranged on the side of the cell facing away from the observer. The variable data consists of bright data against a dark background. The observer's side of the cell is provided with a light-impervious layer 8 which has cutouts 9 and 10 in the region of the variable data as well as in correspondence with the permanent data. A transflective layer is disposed in the cutput region to enable viewing the cutout region and permanent data via incident light.
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Number of Claims:
12
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Owner
VDO Adolf Schindling AG (Frankfurt am Main,DE)
Published
January 19, 1988
Application Number
06/687,616
Filed
December 31, 1984
US Classification
345/38   345/87
Int'l Classification
G09F   9/35   (20060101)   G02F   1/13   (20060101)   G02F   1/1335   (20060101)   G02F   1/1339   (20060101)   G02F   1/1333   (20060101)  
Attorney/Law Firm
Priority Data
Jan 09, 1984 [DE] 3400438
USPTO Field of Search
340/716   340/719   340/753   340/755   340/759   340/784   340/787   340/788   340/765   40/139   40/130  
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Claims
Description
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