389 results about "Polymer light emitting diodes" patented technology

The present invention provides a method and apparatus for using light emitting diodes for curing and various solid state lighting applications. The method includes a novel method for cooling the light emitting diodes and mounting the same on heat pipe in a manner which delivers ultra high power in UV, visible and IR regions. Furthermore, the unique LED packaging technology of the present invention utilizes heat pipes that perform very efficiently in very compact space. Much more closely spaced LEDs operating at higher power levels and brightness are possible because the thermal energy is transported in an axial direction down the heat pipe and away from the light-emitting direction rather than a radial direction in nearly the same plane as the “p-n” junction.

An organic light emitting display device, includes a substrate, at least one organic light emitting diode on the substrate, a functional layer including an opaque material and a light transmitting inorganic material, and an encapsulation layer on the organic light emitting diode, the encapsulation layer including at least one inorganic layer and at least one organic layer.

The addition of a highly polarizable additive such as an organic anionic surfactant to an electrically active polymer improves the electrical properties of the polymer. When such an additive is added to an electroluminescent organic polymer this mixture can be used in diodes having an anode contacting a layer of this mixture as the active light-emitting layer and an air-stable metal cathode having a work function larger than 4 eV. The external efficiency and brightness versus voltage are significantly improved compared to results obtained with the same electroluminescent polymer used alone with high work function (>4.0 eV) metal cathodes. Specifically, device performance with indium / tin-oxide (ITO) as the anode, poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene), MEH-PPV, as the electroluminescent polymer, lithium nonylphenoxy ether sulfate as the surfactant additive and aluminum as the cathode is comparable to or better than that obtained with high performance devices using calcium as the cathode.

An organic light emitting diode (OLED) display is provided. The OLED display includes: a substrate member; an OLED that includes a pixel electrode that is formed on the substrate member, an organic light emitting layer that is formed on the pixel electrode, and a transflective common electrode that is formed on the organic light emitting layer; an encapsulation thin film that is formed on the transflective common electrode; and a touch panel that includes a first touch conductive layer that is formed on the encapsulation thin film and that is formed with a transflective metal film, a glass substrate that is formed on the first touch conductive layer, and a second touch conductive layer that is formed on the glass substrate. In some embodiments, the transflective common electrode has reflectivity of less than 50%. Some of the external light is thus reflected again to the first touch conductive layer and back to the transflective common electrode and so on. During this cycling, destructive interference occurs and the cycled light eventually dissipates. Thus, unwanted reflected light is suppressed.

A microdeposition system (20) and method deposits precise amounts of fluid material onto a substrate. A microdeposition head (50) includes a plurality of spaced nozzles. A positioning device controls a position of the microdeposition head relative to the substrate. A controller (22) includes a positioning module that communicates with the positioning device and that generates position control signals for the positioning device. A nozzle firing module communicates with the microdeposition head (50) and selectively generates nozzle firing commands to define features of at least one layer of an electrical device, such as resistors, traces and capacitors on a printed circuit board, polymer light emitting diodes, and light panels.

The present invention relates to a compound for an organic optoelectronic device, organic light emitting diode and display device. The compound for an organic optoelectronic device may be represented by the following Chemical Formulas 1 to 4 and have excellent electrochemical and thermal stability and thus, provide an organic photoelectric device with excellent life-span characteristics and high luminous efficiency at a low driving voltage. The above Chemical Formulas 1 to 4 are the same as described in the specification.

Pi-conjugated organoboron polymers for use in thin-film organic polymer electronic devices. The polymers contain aromatic and or unsaturated repeat units and boron atoms. The vacant p-orbital of the boron atoms conjugate with the pi-conjugated orbital system of the aromatic or unsaturated monomer units extending the pi-conjugation length of the polymer across the boron atoms. The pi-conjugated organoboron polymers are electron-deficient and, therefore, exhibit n-type semiconducting properties, photoluminescence, and electroluminescence. The invention provides thin-film organic polymer electronic devices, such as organic photovoltaic cells (OPVs), organic diodes, organic photodiodes, organic thin-film transistors (TFTs), organic field-effect transistors (OFETs), printable or flexible electronics, such as radio-frequency identification (RFID) tags, electronic papers, and printed circuit elements, organic light-emitting diodes (OLEDs), polymer light-emitting diodes (PLEDs), and energy storage devices employing the pi-conjugated organoboron polymers. In OLED and PLED applications these materials are used as the electron transport layer (ETL) to improve device efficiency. The polymers which exhibit photo- and electroluminescence are also useful as light-emitting material in PLEDs.

Input interface for an electronic device, comprising a touch-sensitive input detection layer (102), and an input sensor (201) connected to said layer for detecting touch-generated capacitance variations in said detection layer, wherein said detection layer is transparent, and in that a polymer layer (103) of a polymer light emitting diode (PLED) is disposed under said detection layer and devised to emit light through said detection layer. Said polymer layer is preferably sandwiched between a pair of conductive electrode layers (102,104) of said polymer light emitting diode, wherein said detection layer forms one of said pair of electrode layers.

Embodiments relate to functional test methods useful for fabricating products containing Light Emitting Diode (LED) structures. In particular, LED arrays are functionally tested by injecting current via a displacement current coupling device using a field plate comprising of an electrode and insulator placed in close proximity to the LED array. A controlled voltage waveform is then applied to the field plate electrode to excite the LED devices in parallel for high-throughput. A camera records the individual light emission resulting from the electrical excitation to yield a function test of a plurality of LED devices. Changing the voltage conditions can excite the LEDs at differing current density levels to functionally measure external quantum efficiency and other important device functional parameters.

Multilayer anode structures (104) for electronic devices (100) such as polymer light-emitting diodes are described. The multilayer anodes include a high conductivity organic layer (114) adjacent to the photoactive layer (102) and a low conductivity organic layer (112) between the high conductivity organic layer and the anode's electrical connection layer (110). This anode structure provides polymer light emitting diodes which exhibit high brightness, high efficiency and long operating lifetime. The multilayer anode structure of this invention provides sufficiently high resistivity to avoid cross-talk in passively addressed pixellated polymer emissive displays; the multilayer anode structure of this invention simultaneously provides long lifetime for pixellated polymer emissive displays.

The invention provides a light emitting diode. The light emitting diode comprises a substrate, positive pole, hole transfer layer, emitting layer, electron transport layer and negative pole. The emitting layer comprises quantum dots and energy transfer molecules. The energy transfer molecules crosslink with the quantum dots by click chemistry. The energy transfer molecules, as dispersion medium of the quantum dots, have high electron / hole carrier injection ability, which can promote the production of excitons in energy transfer molecules and realize effective energy transfer from energy transfer molecules to fluorescent quantum dots. At certain voltage, the device can emit within the wavelength range of 380-900nm, with the maximum emitting peak covering ultraviolet to dark red light range. The invention further discloses the fabrication method and electronic display equipment of a light emitting diode.

The invention provides an OLED (organic light emitting diode) display panel and a production method thereof. The OLED display panel comprises a plurality of pixel units, wherein each pixel unit comprises a light emitting area and a light transmitting area, each light emitting area is provided with a white light organic transmitting device and a light filter layer; each light transmitting area is not provided with the light filter layer. The light filter layers are additionally provided with the special light transmitting areas, so that the transmittance is increased, the transparent display is realized, no additional process development is needed, and the transparent display can be realized only by appropriately adjusting the design.

A polymeric material comprising alternate substituted fluorene and phenylene units, as represented by the following formula wherein R1, R2, R3 and R4, which may be identical or different, are each selected from the group consisting of H, a (C1-C22) linear or branched alkyl, alkoxy or oligo (oxyetylene) group, a (C6- C30) cycloalkyl group, and an unsubstituted or substituted aryl group, and n is from about 3 to about 5000.

The invention provides an OLED (organic light emitting diode) display unit driving system and an OLED display unit driving method. The OLED display unit driving system leads a common voltage signal (Vcm) in a threshold voltage detection circuit (2) into a sub-pixel driving circuit (1) and applies the common voltage signal (Vcm) to an organic light emitting diode (D1) in a write-in stage, so that the organic light emitting diode is at a negative pressure and reverse bias state; then the common voltage signal (Vcm) is removed from the organic light emitting diode (D1) in a lighting stage, so that the organic light emitting diode (D1) boosts from negative pressure to positive pressure and lights normally, the organic light emitting diode (D1) is subjected to alternate current drive of positive pressure and negative pressure when each frame of picture is refreshed, aging of the OLED is delayed, and the service life of the OLED is prolonged. The OLED display unit driving method provided by the invention delays the aging of the OLED and prolongs the service life of the OLED.

A sun shield, having disengageable swivel bearing, rollable and flexible solar modules on a support material made of scrim tissue or taffeta with layer material to form a laminate, organic (OLED) or polymer (PLED) luminous diodes, has a small cross section in which for an enlargement of the solar surface the support material with thin-layer elements is arranged to be extended and retracted from the sun shield. A component which can be snapped in the opening on the back of the sun shield can be disengaged and used as a flashlight outside the vehicle.

Multilayer anode structures (104) for electronic devices (100) such as polymer light-emitting diodes are described. The multilayer anodes include a high conductivity organic layer (114) adjacent to the photoactive layer (102) and a low conductivity organic layer (112) between the high conductivity organic layer and the anode's electrical connection layer (110). This anode structure provides polymer light emitting diodes which exhibit high brightness, high efficiency and long operating lifetime. The multilayer anode structure of this invention provides sufficiently high resistivity to avoid cross-talk in passively addressed pixellated polymer emissive displays; the multilayer anode structure of this invention simultaneously provides long lifetime for pixellated polymer emissive displays.

The invention discloses an LED (light emitting diode) two-dimensional array light source with a flexible circuit substrate. The LED two-dimensional array light source comprises a plurality of LED chips or packaged LED light beads. The LED two-dimensional array light source is characterized by also comprising the flexible circuit substrate, wherein the flexible circuit substrate is provided with an electric conducting material with electric conducting patterns; solder mask layers are printed on the flexible circuit substrate to form a plurality of binding regions; the LED chips or the light beads are directly pasted on the binding regions, and are connected and conducted mutually through the electric conducting patterns; and array-type through holes are formed on the flexible circuit substrate. The invention provides the LED two-dimensional array light source with the flexible circuit substrate, a curve surface LED array light source type is solved, at the same time, the LED light source heat radiation effect is improved by the flexible circuit substrate and an array-type through-hole technology, thus the heat radiation capability and light dipping efficiency of a luminous light source are improved greatly, the service life is prolonged, the LED two-dimensional array light source with the flexible circuit substrate is more suitable for automatic production so as to be used by public consumers.

Provided are a compound for an organic optoelectronic device represented by Chemical Formula 1, an organic light emitting diode including the same, and a display device including the organic light emitting diode. The structure of Chemical Formula 1 is shown in the specification.The compound for an organic optoelectronic device provides an organic light emitting diode having life-span characteristics due to excellent electrochemical and thermal stability, and having high luminous efficiency at a low driving voltage.

Disclosed herein is a technique for forming a high quality ohmic contact utilizable in the fabrication of short-wavelength light emitting diodes (LEDs) emitting blue and green visible light and ultraviolet light, and laser diodes (LDs) using a gallium nitride (GaN) semiconductor. The ohmic contact is formed by depositing a nickel (Ni)-based solid solution on top of a p-type gallium nitride semiconductor. The ohmic contact thus formed has an excellent current-voltage characteristic and a low specific contact resistance due to an increased effective carrier concentration around the surface of the gallium nitride layer, as well as a high transmittance in the short-wavelength region.

This invention discloses a micro-stamping method for photoelectric process. First of all, in this invention, the micro-stamping method provides a stamp, an ink, an inkpad and a substrate, wherein the stamp or the inkpad having a specific raised pattern and the ink is one element of the group consisting of red ink, green ink and blue ink. Further, by adherence of the ink to the stamp, the specific pattern can be transferred to the surface of the substrate. Furthermore, this micro-stamping method comprises an ink adherence process, a positioning process, a pattern transferring process and a fixation process, and the above-mentioned processes will repeat until the three inks, such as red ink, green ink and blue ink, all adhered and fixed on the predetermined places of substrate. Moreover, this invention can be applied in the fabricating of color filters of TFT-LCD, emitting layers of OLED (Organic Light Emitting Diode), emitting layers of PLED (Polymer Light Emitting Diode) or other related photoelectric processes.

An organic light emitting diode (OLED) display and a method for fabricating the same. The OLED display includes: a substrate; a first electrode formed on the substrate and including a reflecting layer; an organic layer formed on the first electrode and including at least an organic emission layer; a second electrode formed on the organic layer; and an organic capping layer formed on the second electrode. The organic capping layer is formed by stacking an organic material having a refractive index of 1.7 or more, thereby providing a high-efficiency and long-life top-emitting OLED display.

The invention provides a manufacturing method of a high-voltage nitride-based LED (light emitting diode) device, which comprises the following steps of: providing a substrate, and sequentially forming N-type nitride nucleating layers and epitaxial layers on the substrate; etching the epitaxial layers to form N-type contact electrode steps; sequentially etching the N-type nitride nucleating layers to form LED isolation trenches which are exposed out of the surface of the substrate; manufacturing N-type contact electrodes on the N-type contact electrode steps and manufacturing P-type contact electrodes on the epitaxial layers to form a plurality of LED unit chips; and carrying out photoelectric performance test on the LED unit chips, and carrying out laser scribing on the LED unit chips selectively according to a test result so as to cut the LED unit chips in groups to form at least one LED module. The invention also provides the high-voltage nitride-based LED device, so that the cost of the whole LED chip industry is reduced, and the yield is improved.

A halogenated bisdiarylaminopolycyclic aromatic compound, polymers made therefrom, and polymeric light emitting diode devices using the polymers are described. The halogenated compound is represented by formula (I), wherein Ar and Ar′ are each independently substituted or unsubstituted aryl groups and Z is a polycyclic arylene group, wherein at least one of the Ar′ groups is a haloaryl group. Devices using polymers prepared from the halogenated compound exhibit improved performance and longer lifetime, presumably as a result of the presence of the geometrically constrained diarylaminopolycyclic aromatic groups in the polymer backbone.

The present invention provides an organic light emitting diode substrate configured so that the light extraction efficiency of a single color organic light emitting diode element made from one type of light emitting material is high, so that there is no risk of an extraction wavelength deviating from a target light emission wavelength due to slight variations in a fine uneven structure, and so as to enable extraction of a narrow bandwidth of light, from visible light, that has any central wavelength within the near infrared band and that has a degree of broadness. Also provided are an organic light emitting diode, a manufacturing method for the organic light emitting diode substrate, a manufacturing method for the organic light emitting diode, an image display device, and an illumination device. The organic light emitting diode, which is a top emission-type, is configured so that at least the following are laminated on the substrate: a reflective layer comprising a metal material; an anode conductive layer comprising a transparent conductive material; an organic EL layer having a light emitting layer which contains an organic light emitting material; and a cathode conductive layer in which a semi-transmissive metal layer and a transparent conductive layer comprising a transparent conductive material are laminated. On the surface of the semi-transmissive metal layer that is in contact with the transparent conducive layer side, a two-dimensional lattice structure is formed in which a plurality of protrusions are arranged periodically and two-dimensionally. If in the surface the real part of propagation constant of a surface Plasmon expressed by complex numbers is k, a distance between centers (P), which is the distance between centers (P) of adjacent protrusions from among the protrusions formed on the surface, is set to be a value within the range of formula (1). When forming a triangular lattice structure as the two-dimensional lattice structure, P0 in formula (1) satisfies formula (2), and when forming a rectangular lattice structure as the two-dimensional lattice structure, P0 satisfies formula (3).[MathematicalFormula1]0.8P0≤P≤1.2P0(1)[MathematicalFormula2]P0=4π√3k(2)[MathematicalFormula3]P0=2πk(3)

The invention relates to the technical field of organic electroluminescent devices, and discloses an organic light emitting material and an organic light emitting diode (OLED) device comprising the same. The organic light emitting material has a structure represented by the formula (D). The material is used as the light emitting material of an organic light emitting diode, has a TADF function anda light extraction function at the same time, and is a guest material with a balanced hole transfer and electron transfer performance. More importantly, the organic light emitting material does not contain any functional group such as carbazole, triphenyl amine, or the like; thus the stability of the material is good, and avoided are the situations that the chemical bonds are broken, material aging happens, and the device performance deteriorates quickly during the long term using process of OLED devices.

The present disclosure relates to an organic compound, a light emitting diode, and an organic light emitting diode display device using the same. The organic compound is represented by a following chemical formula 1. This organic compound has the advantages in the electron transmitting property and the thermal stability and forms a stable gap state with an alkali metal and an alkali earth metal. The driving voltage of the light emitting diode is reduced and the emission efficiency and the lifetime of the light emitting diode are improved by applying the organic compound to the charge generation layer and / or the electron transporting layer of the light emitting diode of the tandem structure.

Imidazopyridine-based compounds and organic light emitting diodes (OLEDs) including organic layers including the imidazopyridine-based compounds are provided. The organic light emitting diodes including organic layers having the imidazopyridine-based compounds have low driving voltages, high efficiencies, high luminance, long life-times and low power consumption.

Embodiments relate to mass-transfer methods useful for fabricating products containing Light Emitting Diode (LED) structures. LED arrays are transferred from a source substrate to a target substrate by beam-assisted release (BAR) of a plurality of LED devices in a high-speed flexible manner. The BAR mass-transfer approach is also able to utilize a Known Good Die (KGD) data file of the source substrate to transfer only functionally good die and avoid rework and yield losses.