Circuit for the actuation of liquid crystal layers in mirrors
First Claim
1. A dimmable composite pane comprising:
- two polarizing filter layers;
two transparent support layers;
a liquid crystal layer bounded on a first and a second side by conducting layers positioned between the two polarizing filter layers and arranged on the two transparent support layers;
means for controlling the pane including first and second flip-flop means for feeding the first and second conducting layers, said flip-flop means having outputs connected to respective inputs of said conducting layers;
dimmer means for simultaneous resetting, in a frequency dependent manner, of the flip-flop means connected to a reset input of the first and second flip-flop means;
means for driving said flip-flop means including means for providing synchronously timed input signals such that the input signal for the first flip-flop means is 180 degrees out of phase with the input signal for the second flip-flop means and timing means for providing clock signals to said first and second flip-flop means at a rate twice the frequency of the synchronously timed input signals.
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Accused Products
Abstract
Circuit layout for the actuation of liquid crystal layers, formed by flip-flops (4, 5) arranged in the feeder lines of the conducting layers, with a common dimmer-IC preceding the reset inlets (R) and synchronized in a frequency dependent manner, wherein the flip-flops (4, 5) are timed synchronously, so that their preparatory inlets (4/5, 5/9) are actuated with a phase shift of 180° and the clocking inlets (4/3, 5/11) are timed with the double frequency of the preparatory inlets (4/5, 5/9). The timing means consists of an oscillator (10a) and a decoupling gate (10b), the outlets of which are connected with a frequency divider, each (8, 9) preceding the dimmer-IC (7) and the flip-flops (4, 5), of which the frequency divider (9) preceding the flip-flops (4, 5) serves as an alternator, the inverted outlets (9/1, 9/2) of which are connected with a preparatory inlet (4/5, 3/9) of the flip-flops (4, 5). The liquid crystal layer, the conducting layers arranged on transparent support layers and one of the polarizing filter layers are combined in a composite, while the other polarizing filter layer is formed in a spaced apart support.
141 Citations
8 Claims
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1. A dimmable composite pane comprising:
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two polarizing filter layers; two transparent support layers; a liquid crystal layer bounded on a first and a second side by conducting layers positioned between the two polarizing filter layers and arranged on the two transparent support layers; means for controlling the pane including first and second flip-flop means for feeding the first and second conducting layers, said flip-flop means having outputs connected to respective inputs of said conducting layers; dimmer means for simultaneous resetting, in a frequency dependent manner, of the flip-flop means connected to a reset input of the first and second flip-flop means; means for driving said flip-flop means including means for providing synchronously timed input signals such that the input signal for the first flip-flop means is 180 degrees out of phase with the input signal for the second flip-flop means and timing means for providing clock signals to said first and second flip-flop means at a rate twice the frequency of the synchronously timed input signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification