| 摘要 |
An active matrix display device comprises a plurality of pixels, a vertical scanning circuit, a horizontal addressing circuit, a wide input switch element and a normal input switch element. The plurality of pixels are arrayed in a matrix shape. The vertical scanning circuit sequentially selects pixels every line. The horizontal addressing circuit dot-sequentially addresses selected line pixels and has a shift register constituted by a number of multi-stage connected flip-flops, the number of which corresponds to the total number of rows of pixels. Each flip-flop is equipped with a pair of input/output terminals and a prescribed start pulse is transferred every stage. The wide input switch element inputs a start pulse to an input terminal of a flip-flop positioned at a leading stage during wide displaying. The normal input switch element inputs a start pulse to an input of a flip-flop positioned at a specific intermediate stage during normal displaying. It is therefore possible to switch over between a wide display and a normal display using a horizontal addressing circuit employing a single shift register.
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