Abstract: An organic electroluminescent display (EL) device which can prevent damage to layers due to a deposition mask in forming a light emitter layer or cathode using a deposition mask, and can prevent the short-circuit between a first electrode formed on a transparent substrate and a second electrode corresponding to the first electrode and can prevent deterioration of layer characteristics, and a method of manufacturing the same.

Abstract: An organic electroluminescent (EL) display device includes an anode, a hole transport layer formed on the anode, a light-emitting layer formed on the hole transport layer, a cathode formed on the light-emitting layer, and an electron injection layer including a metal oxide represented by formula 1 formed between the light-emitting layer and the cathode. Formula 1 is MAxMByOz, where MA denotes an alkali metal or alkali earth metal, MB is a group IV or V metal, x is a number between 1 and 2 inclusive, y is a number between 1 and 2, and z is a number between 2 and 3 inclusive.

Abstract: A mask frame assembly used in vacuum deposition of thin films of an organic electroluminescent device. The mask frame assembly includes a frame having an opening and at least two unit masks which each have at least one unit masking pattern portion in the direction of the unit mask and two edges which are fixed to the frame under tension.

Abstract: Provided are a method and apparatus for driving an electro-luminescence (EL) display panel having data electrode lines and scanning electrode lines intersecting each other at a predetermined distance and EL cells, formed at the intersections thereof. In the method and apparatus, a booting current corresponding to a magnitude change of a display data signal in the next horizontal drive time period with respect to a display data signal in the current horizontal drive time period is applied to each of the data electrode lines at the beginning of the next horizontal drive time period. Instantaneous values of the booting currents are kept constant, and the application time for the booting current is proportional to a magnitude change of each display data signal in the next horizontal drive time period with respect to the display data signal in the current horizontal drive time period.

Abstract: Provided is an apparatus for driving a display panel. The apparatus includes a main display control unit, an icon display control unit, a dot-matrix display control unit, first and second oscillators, an icon driver, and a dot-matrix driver. While the first oscillator generates a first clock signal composed of pulses having a first frequency and supplies the same to the dot-matrix display control unit, the second oscillator generates a second clock signal composed of pulses having a second frequency that is lower than the first frequency and supplies the second clock signal to the icon display control unit.

Abstract: An apparatus for driving a display panel is provided. The display panel driving apparatus includes a main display controller, an icon display controller, a dot-matrix display controller, an icon driver, a dot-matrix driver, a first DC-DC converter, and a second DC-DC converter. The first DC-DC converter boosts an input DC voltage using a coil and supplies the boosted voltage as a first boost voltage to the dot-matrix driver. The second DC-DC converter boosts an input DC voltage using a capacitor and supplies the boosted voltage as a second boost voltage to the icon driver.

Abstract: An organic electroluminescent (EL) device and a method of manufacturing the same utilize a cathode, an anode, and organic layers formed between the cathode and the anode, wherein the cathode includes a first cathode containing aluminum, and a second cathode disposed under the first cathode, formed in the vicinity of an organic layer and containing a metal having a work function of 3.5 to 5.0 eV, and metallic carboxylate represented by: RCOOM  Formula 1 wherein M is an alkali metal or alkaline-earth metal, and R is a C1-C10 alkyl or C6-C20 aryl.

Abstract: An organic electroluminescent display (EL) device includes a substrate, an organic light emitting portion formed such that a positive electrode formed in a predetermined pattern, an organic layer formed on the positive electrode, and a negative electrode having a predetermined pattern in a direction orthogonal with the positive electrode are sequentially stacked, an encapsulation cap which encapsulates the organic light emitting portion, first and second groups of electrodes which are drawn out from at least one edge of the encapsulation cap and connected to the positive and negative electrodes to drive the organic light emitting portion, and first and second dummy electrodes formed at one side of the substrate.