| 摘要 |
PURPOSE:To make a gradational display with stable brightness by interposing a dielectric layer between scan-side electrodes and data-side electrodes and using a lamp voltage as a modulating voltage to be applied to the data-side electrodes. CONSTITUTION:A display panel 6 is made of a thin film EL element and the dielectric layer is interposed between the scan-side electrodes 7 and data-side electrodes 9. The scan-side electrodes 7 are connected to a scan-side driving circuit 8 and the data-side electrodes 8 are connected to a data-side driving circuit 10. A display control circuit 11 controls the scan-side driving circuit 8 and data-side driving circuit 10 and a write voltage is applied from the scan- side driving circuit 8 to the scan-side electrodes 7 in line order. The lamp voltage which is varied in pulse width according to gradational display data sent from the display control circuit 11, on the other hand, is applied as the modulating voltage to the data-side electrode 8 by the data driving circuit 10. Thus, the gradational display with stable brightness can be made. |
