| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem in which since the life of an organic EL element is limited, only its pixels deteriorate to cause sticking when the same pixels are made to continuously illuminate for a long period of time. <P>SOLUTION: For a still picture, variation of data is only checked. A frame memory, however, is necessary and hardly used for a small-sized device to view data of the entire screen. For the purpose, the data are combined in various forms and added to detect the still picture by comparing addition data. Once the still picture is detected, a waveform dividing circuit finely divides a part of black display of intermittent driving to eliminate a flicker. Further, when the still picture lasts long, the quantity of light emission of an organic EL panel is decreased by a gate driver to decrease the quantity of light emission. Lastly, a signal line through which transistors making the organic EL element illuminate are forcibly turned off is operated by a halt circuit to prevent the organic EL element from having the sticking. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
