Electroluminescent display device and driving method thereof

An electroluminescent display device according to an embodiment of the present disclosure includes: a display panel including a plurality of pixels, each pixel including a light emitting element; a DBV regulator configured to output brightness data having different values according to a user input to regulate a screen brightness of the display panel; a duty cycle adjuster configured to adjust an emission duty cycle of the light emitting element according to the luminance data; and a power regulator configured to regulate a low-level source voltage to be applied to the pixel within a preset power supply voltage range according to the luminance data, in which an emission duty ratio of the light emitting element gradually increases from 0% to an upper limit set to less than 100%. 根据本公开内容实施例的电致发光显示装置包括：显示面板，包括多个像素，每个像素包括发光元件；DBV调节器，被配置为根据用户输入输出具有不同值的亮度数据，以调节显示板的屏幕亮度；占空比调节器，被配置为根据亮度数据调节发光元件的发射占空比；以及功率调节器，被配置为根据亮度数据在预设电源电压范围内调节要施加到像素的低电平源电压，其中，发光元件的发射占空比从0％逐渐增加到被设置为小于100％的上限。