Analogue displays for electronic time pieces for meters

Details Analogue displays for electronic time pieces for meters Analogue displays for electronic time pieces for meters

G - Physics

09

G

348/22, 375/37,

G09G 3/00 (2006.01) G04G 9/06 (2006.01)

Patent

CA 1149527

ABSTRACT An analogue display with a panel having an electro-optic medium contained between two sets of electrodes. One set is arranged in a plurality of segments each divided into inner and outer portions. Each portion is planar and has a plurality of digits. The digits of one portion are inter- posed alternate with, and in between, the digits of the other. The other set has a planar meander configuration modified by an electrode interposed in its folds. The sets of electrodes when registered one over the other define two subsets of different selectable index positions. Selected alternating voltages are applied simultaneously to the electrodes maintaining the panel ON at two selected index positions and OFF elsewhere to display each one of two different indices. Preferably the voltages are selected from the set (+2V, +V, -V) of RMS magnitudes (2Vc, Vc, V ) where V is equal to the thres- hold voltage of the panel. The panel may contain liquid crystal material, as medium, to perform as a dyed phase change, or twisted nematic effect device.

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