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(11) | EP 1 026 657 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Addressable matrix arrays |
| (57) A ferroelectric liquid crystal display panel 10 comprises a layer of ferroelectric
liquid crystal material contained between two substrates and bearing first and second
electrode structures on their inside surfaces. The first and second electrode structures
comprise respectively a series of row and column electrode tracks 4 and 5 which cross
one another to form a matrix array of switching elements. The addressing of the switching
elements is controlled by a data signal generator 14 and a strobe signal generator
15 by applying data waveforms in parallel to the column electrode tracks 41, 42..4n and by sequentially applying a strobe waveform to the row electrode tracks 51, 52..5m so as to switch selected switching elements along each row from one state to another.
In order to compensate for differential waveform distortion across the display due
to the effects of the different electrode track resistances seen at each column driver
input, the data signal generator 14 is coupled to the column electrode tracks by compensating
resistances R1, R2, R3, etc. having resistance values which vary from the first to the last columns. It
is therefore possible to substantially equalise the picture quality across the display,
and to ensure that temperature variations across the display caused by the different
power components of the different waveforms are substantially equalised. |