Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1990-01-24
1991-04-02
Arnold, Bruce Y.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
350269, 340763, G02B 2700, G02B 2602
Patent
active
050043226
ABSTRACT:
An electroscopic fluid display comprises substrates (1, 2) having fixed electrodes (12, 22), and movable electrodes (3) between the substrates, the electrodes (12, 22, 3) being provided on the free main surfaces with an insulating layer (13, 23, 31, 32) respectively, and asymmetry of the alternating voltage drive for the electrodes being adapted to the difference in surface properties as regards charge delivery and charge adsorption of facing insulating layers (13, 31; 32, 23), or the alternating voltage drive is symmetrical, and facing insulating layers (13, 31; 32, 23) have substantially the same surface properties as regards charge delivery and charge adsorption. The insulating layer (31, 32) consists preferably, on at least one main surface of the movalbe electrode (3) of anodized electrode material and continuing along (33) the outer peripheral and inner peripheral portions of the perforated movable electrode. The insulating layer on the substrate (1, 2) opposite the insulating layer of anodized metal material (31, 32) on the main surface of the movable electrode (3) consists of an oxide of the same metal material.
REFERENCES:
patent: 4807967 (1989-02-01), Veenvliet et al.
patent: 4923283 (1990-05-01), Verhulst et al.
Bruinink Jacob
Lenders Emanuel J. W. M.
Verhulst Antonius G. H.
Arnold Bruce Y.
Ben Loha
Miller Paul R.
U.S. Philips Corporation
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