Liquid crystal diplay device
AssigneeKoninklijke Philips Electronics N.V.
InventorAdolphe Johannes Gerardus Ruigt
Life of this patent
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Abstract
Compensation, e.g. temperature compensation of the operating voltage of an LCD is obtained by using the V50 point of a test cell via the differentiated AC current (switching current of the test cell as a control parameter).
Claims6
A liquid crystal display device comprising a first substrate provided with electrodes and a second substrate provided with electrodes, and a twisted nematic liquid crystal material between the two substrates, in which, viewed perpendicularly to the substrates, overlapping parts of the electrodes define pixels, characterized in that the display device is provided with means for adjusting the operating voltage of the liquid crystal display device in dependence upon the switching behavior of a measuring element.
Dependencies are inferred from the claim text.