Patent ID: 8085236
Filing Date: 2011-12-27
Classification: G09G,G11C

Abstract:
1. A display device in which an active matrix display panel is driven by a driving circuit, the display device comprising: a shift register including a plurality of stages connected in a cascade fashion, each stage including an RS flip-flop in which an active input to a set input terminal has a higher priority than an active input to a reset input terminal, the RS flip-flop operating as a data latch circuit, each stage outputting a respective output signal, the shift register configured to operate in a first mode of operation and a second mode of operation, wherein the first mode of operation includes (i) supplying a signal to the set input terminal of the RS flip-flop of a predetermined stage among the plurality of stages, (ii) sequentially transferring the signal downstream through the predetermined stage and subsequent stages based on timing signals and (iii) sequentially outputting the output signal from the predetermined stage and the subsequent stage in response to the timing signals, wherein the second mode of operation includes setting all of the output signals to be active in union by supplying an active input to the set input terminal of the RS flip-flop in a first stage of the plurality of stages.