Patent application number | Description | Published |
20080211385 | ORGANIC ELECTRO-LUMINESCENT DISPLAY - Provided is an organic electro-luminescent display (OELD). The OELD includes: a plurality of unit pixels having an organic light emitting unit and a driving unit for driving the organic light emitting unit; and a substrate supporting the unit pixels, wherein the substrate has a non-planar portion corresponding to the light emitting unit and increasing a surface area, and the light emitting unit has a non-planar cross-sectional shape corresponding to the non-planar portion. The OELD has a concave portion or a convex portion for enlarging a surface such that the substantial area of an organic light emitting material increases. Thus, an effective light emission area increases in a pixel having a limited area and light emission of desired high brightness can be performed by a low driving voltage. A reduction in a driving voltage causes improvement in the durability of a pixel and the life span of the OELD is enlarged. | 09-04-2008 |
20080318084 | White organic light emitting device and display apparatus - A white organic light emitting device and a display apparatus and a lighting apparatus including the same. The white organic light emitting device include an anode, a hole transporting layer, a light emitting layer, an electron transporting layer, a cathode, and at least one color stabilizing layer between the light emitting layer and the electron transporting layer. | 12-25-2008 |
20090026929 | White organic light emitting device - A white organic light emitting device (OLED) includes an anode and a cathode spaced apart from each other; a blue light emitting layer, a green light emitting layer, and a red light emitting layer sequentially formed between the anode and the cathode; a first buffer layer formed between the blue light emitting layer and the green light emitting layer, and having a HOMO (highest occupied molecular orbital)-LOMO (lowest occupied molecular orbital) energy gap higher than or equal to that of the adjacent light emitting layers; and a second buffer layer formed between the green light emitting layer and the red light emitting layer, and having a LOMO energy level higher than that of the red light emitting layer. | 01-29-2009 |
20090072720 | White organic light emitting device and display apparatus and lighting apparatus comprising the same - Provided is a white organic light emitting device and a display apparatus and a lighting apparatus that include the white organic light emitting device. The white organic light emitting device comprises an anode, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode. The light emitting layer includes a red light emitting layer, a blue light emitting layer, and a green light emitting layer sequentially formed from the anode. A functional layer, which blocks an energy transfer and controls electron mobility between the light emitting layers, is formed between the red light emitting layer and the blue light emitting layer or between the blue light emitting layer and the green light emitting layer. The functional layer formed between the red light emitting layer and the blue light emitting layer has a thickness of 50 to 100 Å. | 03-19-2009 |
20090090904 | Organic semiconductor device - Provided is an organic tunneling p-n junction diode. The organic tunneling p-n junction diode includes an n-doped organic semiconductor layer and a p-doped organic semiconductor layer which are doped with extrinsic impurities. When either a reverse-bias voltage or a forward-bias voltage is applied, the organic tunneling p-n junction diode is turned off within a predetermined voltage range and has exponential voltage-current characteristics outside the predetermined voltage range. | 04-09-2009 |
20090091248 | White organic light emitting device - A white organic light emitting device (OLED) includes a pair of independent electrodes, a common electrode positioned between the independent electrodes, and a pair of white emission units respectively positioned at both sides of the common electrode in a mirror symmetry and emitting white light. | 04-09-2009 |
20090096358 | White organic light emitting device and color display apparatus employing the same - A top emission type white organic light emitting device (OLED) has a high resolution and a wide color gamut, and a color display apparatus uses the same. The white OLED includes a substrate; a reflective electrode formed on the substrate; an organic light emitting layer formed on the reflective electrode; a semi-transparent electrode formed on the organic light emitting layer; and in the white OLED, a wavelength of a resonating mode determined by an optical thickness between the reflective electrode and semi-transparent electrode is shorter than a shortest wavelength in a visible light region of a white light spectrum generated in the organic light emitting layer. | 04-16-2009 |
20090096359 | White organic light emitting device and color display apparatus employing the same - An organic light emitting device (OLED) having increased light output efficiency and a wide color gamut, and a color display apparatus employing the OLED, includes: a substrate; a reflective electrode formed on the substrate; an organic light emitting layer formed on the reflective electrode; a semi-transparent or transparent electrode formed on the organic light emitting layer; and an optical path control layer formed on the semi-transparent or transparent electrode and formed of a light transmitting material. In the OLED, resonators are formed between the reflective electrode and the semi-transparent or transparent electrode, between the reflective electrode and the top surface of the optical path control layer, and between the top surface of the semi-transparent or transparent electrode and the top surface of the optical path control layer, respectively, therefore, as an optical mode output to the exterior of the optical path control layer, at least two multiple resonances are generated. | 04-16-2009 |
20090102362 | Organic light emitting device and color display apparatus using the same - A top-emitting or bottom-emitting OLED has a wide color gamut and reduces a variation in color with a viewing angle. The OLED includes a reflective electrode and a transmissive or semi-transmissive electrode disposed opposite each other; at least two organic emission layers (EMLs) interposed between the reflective electrode and the transmissive or semi-transmissive electrode; and an optical path control layer disposed on an outer surface of the transmissive or semi-transmissive electrode. A resonator is formed between the reflective electrode and the optical path control layer so a resonance mode of light extracted from the optical path control layer is a multi-resonance mode having at least two modes in a visible light region. A distance between the organic EMLs satisfies the condition of constructive interference between light beams emitted by the respective organic EMLs. A color display apparatus using the OLED are taught. | 04-23-2009 |
20090115319 | White organic light emitting device - Provided is a white organic light emitting device (OLED). The white OLED includes a double cavity structure in which a first region and a second region are defined based on a transparent common electrode using a top emission method. A green phosphorescence or fluorescence emission layer is disposed in the first region, a blue fluorescence emission layer is disposed in the second region, a red emission layer is optionally disposed in the first region or the second region, and an optical path control layer (OPCL) for widening color gamut is disposed in a region in which green light and blue light are emitted so that color coordinates are not greatly changed due to a change in thickness of the OPCL and white light having good quality is obtained. | 05-07-2009 |
20090146560 | White organic light emitting device - A white organic light emitting device (WOLED) includes electroluminescence (EL) red and blue light emitting layers disposed inside a cavity and a non-electroluminescence (NEL) green light emitting unit disposed outside the cavity or on a region inside the cavity where there are no combinations of electrons and holes. The green light emitting unit adjusts a green spectrum by resonating greenish blue light in the cavity, or is disposed on a path through which red and blue light output from the cavity travels and adapted to absorb the blue light and emit green light. A photoeluminescence (PL) light emitting layer may be a capping layer covering the cavity. The capping layer functions as an optical path control layer controlling an optical path. A white spectrum is obtained by combining blue light and red light generated by EL and green generated by PL. This WOLED can operate at a low voltage. | 06-11-2009 |
20090230871 | Organic light emitting display device and method of driving the same - Provided are an organic light emitting display device coupled to a photoelectric transistor. The organic light emitting display device includes an anode and a cathode separated from each other, a plurality of organic material layers formed between the anode and the cathode and including an organic light emitting layer, a light source applying an excitation pulse to the organic material layers, and a light receiving unit measuring changes in photoluminescence (PL) signals that are emitted from the organic material layers. | 09-17-2009 |
20140124744 | ORGANIC LIGHT EMITTING DISPLAY APPARATUS AND METHOD OF MANUFACTURING THE SAME - An organic light emitting display apparatus including a plurality of sub-pixels disposed on a substrate, wherein each of the sub-pixels includes: a first electrode formed on the substrate; an intermediate layer formed on the first electrode and including an organic emission layer; and a second electrode formed on the intermediate layer, wherein at least one sub-pixel for emitting light of a color among the sub-pixels includes a shadow emission layer for emitting light of different color between the organic emission layer and the first electrode, and the organic emission layer of the one sub-pixel includes a hole transport material. | 05-08-2014 |