Active matrix electroluminescent display device
AssigneeKoninklijke Philips Electronics N.V.
InventorIain M. Hunter
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Abstract
An active matrix electroluminescent display device comprises an array of display pixels (10) which each include a current-driven electroluminescent display element (20) connected to a driving device (22) controlling the current flowing through the display element in a drive period according to a voltage stored on a capacitance (36) and determined by a data signal applied in a preceding address period. In order to compensate for ageing effects in the display element, electro-optic devices (45, 40) are included in the pixel for adjusting the voltage stored on the capacitance in dependence on the light output of its display element during the address period.
Claims20
An active matrix electroluminescent display device comprising an array of display pixels with each pixel comprising an electroluminescent display element and a driving device for controlling the current through the display element based on a drive signal applied to the pixel during an address period and stored as a voltage on a storage capacitance connected to the driving device, characterised in that each pixel includes electro-optic adjustment means which is responsive to light produced by the display element during an address period and arranged to adjust in the address period the voltage signal stored on the capacitance in the address period in accordance with the light output level of the display element.
An active matrix electroluminescent display device comprising:
- an array of display pixels with each pixel comprising an electroluminescent display element and an associated driving device for controlling current through the associated display element based on a drive signal applied to the pixel from a data drive circuit during an address period and stored as a voltage on an associated storage capacitance connected to the associated driving device, wherein
- each pixel includes an electro-optic device which is responsive to light produced by the display element during an address period and the electro-optic device adjusts, in the address period, a voltage stored on the storage capacitance in accordance with the light output level of the associated display element.
Dependencies are inferred from the claim text.