| 摘要 |
A colour active matrix electroluminescent (EL) display device has an array of pixels ( 10 ) comprising sets of red, green and blue emitting pixels, each of which pixels comprises an EL display element ( 20 ), a drive transistor ( 22 ) for driving a current through the display element, a storage capacitor ( 24 ) for storing a voltage used for addressing the drive transistor, and a discharge photosensitive element ( 40, 42 ) for discharging the storage capacitor in dependence on the light output of the display element. The discharge photosensitive elements ( 42 ) in the set of blue pixels comprise lateral photosensitive thin film devices, such as lateral thin film transistors or gated or ungated lateral photodiode devices, while the discharge photosensitive elements ( 40 ) in the set of red pixels, and preferably the set of green pixels as well, comprise vertical p i n photodiodes ( 40 ). The selection of the photosensitive elements in this manner leads to enhanced colour-related photo-sensitivity, and thus improved display device performance.
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