Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
291 words
Apparatus for simultaneously displaying two waveform traces comprising: (i) an electro optic display having a layer of display material between two dielectric substrates, a first series of m strip electrodes on one substrate and a second series of n strip electrodes on the other substrate arranged to define an m×n plurality of elements across which an electric signal may be applied to change the layer from one state to another thereby causing an observable display effect; (ii) means for generating m different coded reference waveforms from different L-bit, N'-ary numbers whereby each waveform has a different shape over a period t, L and N' being integers greater than 1; (iii) means for supplying a secondary voltage signal different from all the coded reference waveforms; (iv) means for applying a different one of said coded reference waveforms to some of the first set of electrodes whilst applying said secondary voltage signal to the remainder of the first set of electrodes so that all electrodes in the first set receive one of said coded waveforms and said secondary voltage signal in turn; (v) means for selectively producing ones of the coded waveforms for application to the second set of electrodes simultaneously with coded waveform voltages applied to the first set of electrodes, the choice of such selectivity produced coded waveforms being related for each successive n electrode to successive sample values of the two traces, and to the order of coded waveforms on the first set of electrodes; (vi) the arrangement being such that the two waveform traces appear collectively at intersections where the same waveform occurs periodically and simultaneously on both m, n electrodes to produce a below display threshold voltage level and the voltage at other intersections is above threshold level.
Claim 2
Dependent Claim
291 words
Apparatus for simultaneously displaying two waveform traces comprising: (i) an electro optic display having a layer of display material between two dielectric substrates, a first series of m strip electrodes on one substrate and a second series of n strip electrodes on the other substrate arranged to define an m×n plurality of elements across which an electric signal may be applied to change the layer from one state to another thereby causing an observable display effect; (ii) means for generating m different coded reference waveforms from different L-bit, N'-ary numbers whereby each waveform has a different shape over a period t, L and N' being integers greater than 1; (iii) means for supplying a secondary voltage signal different from all the coded reference waveforms; (iv) means for applying a different one of said coded reference waveforms to some of the first set of electrodes whilst applying said secondary voltage signal to the remainder of the first set of electrodes so that all electrodes in the first set receive one of said coded waveforms and said secondary voltage signal in turn; (v) means for selectively producing ones of the coded waveforms for application to the second set of electrodes simultaneously with coded waveform voltages applied to the first set of electrodes, the choice of such selectivity produced coded waveforms being related for each successive n electrode to successive sample values of the two traces, and to the order of coded waveforms on the first set of electrodes; (vi) the arrangement being such that the two waveform traces appear collectively at intersections where the same waveform occurs periodically and simultaneously on both m, n electrodes to produce a below display threshold voltage level and the voltage at other intersections is above threshold level.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1 wherein the first set of m electrodes are arranged in two subsets alternating with one another.
Claim 4
Dependent Claim
35 words
Apparatus according to claim 2 and further comprising a priority encoder for ensuring that two values of the two traces do not appear on the same subset of m electrodes on a given n electrode.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 wherein the electro-optic display is a liquid crystal display.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 4 wherein the display includes a cholesteric liquid crystal material.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 4 wherein the display is arranged to provide a progressive molecular twist across the layer liquid crystal material.
Claim 8
Dependent Claim
15 words
Apparatus according to claim 4 wherein the liquid crystal material contains an amount of dye.
Claim 9
Dependent Claim
13 words
Apparatus according to claim 1 wherein the coded waveforms are binary coded waveforms.
Claim 10
Dependent Claim
22 words
Apparatus according to claim 8 wherein the binary coded waveforms are for at least a portion of their sequence pseudo random codes.
Claim 11
Dependent Claim
21 words
Apparatus according to claim 8 wherein the means for selectively producing ones of the coded waveforms comprises a read only memory.
Claim 12
Dependent Claim
19 words
Apparatus according to claim 3 comprising a random access memory for storing sample values of traces to be displayed.
Claim 13
Dependent Claim
17 words
Apparatus according to claim 1 comprising means for changing information representing the two traces to be displayed.
Claim 14
Dependent Claim
33 words
Apparatus according to claim 11 comprising charge coupled devices for sampling two traces to be displayed and analogue to digital converters for providing sample numbers to be entered into a random access memory.