Patent ID: 9224328
Filing Date: 2015-12-29
Classification: G09G

Abstract:
1. A driving method of an organic electro luminescence display device including a plurality of data lines that cross a plurality of scan lines, and including electro luminescence elements arranged at intersections of the plurality of data lines and the plurality of scan lines, the method comprising: judging gray level values of incoming data based on a reference gray level and comparing previous data and the incoming data; reading a plurality of different pre-charge current levels corresponding to the gray level values from a lookup table; selectively generating first, second and third selection signals corresponding to the plurality of different pre-charge current levels, a data current and a discharge current level, respectively; selecting one of the plurality of different pre-charge current levels from a plurality of current sources in response to the first selection signal; supplying a pre-charge current, corresponding to the selected one of the plurality of different pre-charge current levels, to the electro luminescence elements via a first switching device and the plurality of data lines for a pre-charge period of a non-display period prior to supplying the data current, corresponding to the incoming data, so as to pre-charge the electro luminescence elements, wherein the first switching device is turned-on by the first selection signal for the pre-charge period, in response to judging a grey level value of the incoming data to be less than the reference grey level; selecting the discharge current level in response to the third selection signal; supplying the discharge current level to the electro luminescence elements via a third switching device and the plurality of data lines for a pre-charge period of a non-display period prior to supplying the data current, corresponding to the incoming data, so as to discharge the electro luminescence elements, wherein the third switching device is turned-on by the third selection signal for the pre-charge period, in response to judging a grey level value of the incoming data to be greater than the reference grey level and based on the comparison of the previous data and the incoming data; and subsequently supplying the data current to the pre-charged electro luminescence elements via a second switching device which is turned-on by a second selection signal for a display period subsequent to the non-display period, wherein the first switching device is turned-off for the display period.