Abstract: In an active matrix display device utilizing electro-optical elements such as organic EL elements capable of obtaining a high image quality with a low power, each pixel circuit is provided with: a sampling circuit for sampling a signal voltage on a signal wiring line synchronously with a scan pulse; a reference voltage; and a comparator circuit. In the pixel circuit, the sampled signal voltage is compared with the reference voltage and the display time of each EL device is controlled by the period until the relation between the signal voltage and reference voltage is inverted, to thereby control the light emission time in one frame period.

Abstract: In an active matrix display device utilizing electro-optical elements such as organic EL elements capable of obtaining a high image quality with a low power, each pixel circuit is provided with: a sampling circuit for sampling a signal voltage on a signal wiring line synchronously with a scan pulse; a reference voltage; and a comparator circuit. In the pixel circuit, the sampled signal voltage is compared with the reference voltage and the display time of each EL device is controlled by the period until the relation between the signal voltage and reference voltage is inverted, to thereby control the light emission time in one frame period.

Abstract: An organic EL light emitting element and a light emitting device capable of realizing inexpensively a display which a scanning line current is suppressed and which is large size and high-resolution is provided. The organic EL light emitting element 6 is constituted from a transparent electrode 2; an opposed electrode 3 arranged in a manner to oppose to this transparent electrode 2; an intermediate conductive layer 4 of "n" sheets (1.ltoreq.n.ltoreq.100); and an organic layers 5 comprising at least an organic light emitting layer, the organic light emitting layer being arranged between the transparent electrode 2 and the opposed electrode 3 in a manner to sandwich the intermediate conductive layer 4 in an intermediate position. These organic EL light emitting element 6 are arranged in one dimension or in two dimensions, whereby the light emitting device 10 is constituted.

Abstract: An electroluminescence device capable of emitting white light is disclosed which comprises a SrS layer with Ce added thereto as an activator and a ZnS layer with Mn added thereto as an activator.