Active matrix array device, electronic device having an active matrix array device and picture quality improvement method for such an electronic device

Abstract

An active matrix array device ( 100 ) has a plurality of active matrix array elements ( 110 a-i), which each have a charge storage element ( 112 a-I) and a capacative output element ( 114 a-I), and which are coupled to respective addressing conductors ( 172, 174, 176 ) and to respective charging conductors ( 142, 144, 146 ) via respective thin film transistors ( 116 a-I). The charging conductors ( 142, 144, 146 ) are coupled to the respective stages ( 122, 124, 126 ) of a driver circuit ( 120 ) via respective voltage modification circuits ( 132, 134, 136 ), which are responsive to respective voltage waveform generators ( 252, 254, 256 ). The respective voltage modification circuits ( 132, 134, 136 ) are arranged to modulate the outputs of the stages ( 122, 124, 126 ) with a voltage waveform from the respective voltage waveform generators ( 252, 254, 256 ) in order to overdrive the addressed matrix array element during a part of its charging cycle. This way, the charge time of the corresponding charge storage element and / or the corresponding output element is reduced.

Description

technical field [0001] The present invention relates to an active matrix array device comprising a plurality of matrix array elements, each matrix array element having a charge storage device. [0002] The invention also relates to an electronic display device having such an active matrix array device. [0003] The invention also relates to a method for improving the image quality of such an electronic display device. Background technique [0004] Active matrix array devices are used in many different fields from sensor-type applications to display-type applications. In the area of ​​larger displays, active matrix array devices are increasingly competing with more traditional cathode ray tube displays as the dominant technology. [0005] In general, a matrix array device has sets of intersections of addressing and charging conductors, with matrix array elements coupled from each set to individual leads at the intersecting intersections. In the case of a matrix array displ...

AI Technical Summary

Problems solved by technology

First, it is a complex structure that requires a lot of hardware in the driver circuit, which increases the cost of the active matrix array device

Furthermore, it is limited to ramp voltage based drive signal generation, which means that other driver circuit configurations, like voltage divider type driver circuits that produce a limited number of discrete luminance outputs, cannot benefit from this device

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