| 摘要 |
PROBLEM TO BE SOLVED: To attain continuous light emission for a long time by applying AC voltage to an electroluminescence(EL) plate at the time of non-selection of scanning. SOLUTION: A light emitting signal is synchronized with a pulse of voltage 2V0 of a first phase of a scan selecting signal and a light emission inducing signal having voltage -V0 is set, voltage 3V0 being more than light emission threshold value voltage 2V0 in the forward bias direction is applied to EL and a light emitting state is caused. Further, the light emitting signal is synchronized with voltage 0 of a second phase of the scan selecting signal, voltage V0 is applied, voltage -V0 is applied to EL in this case, but it is made into a non- light emitting state. When a non-light emitting signal is synchronized with a first phase voltage and a second phase voltage of the scan selecting signal and applied, voltage V0 is applied respectively, and a non-light emitting state is caused. On the other hand, either of a light emitting signal or a nonlight emitting signal is received by EL from an information signal line at the time of applying a scan non-selecting signal (non-selection period), AC voltage formed by voltage V0 and voltage -V0 constituting a light emitting signal and a non- light emitting signal is applied. |
