294 results about "Electroluminescent display" patented technology

A light absorption filter that contains a resin; a dye having a main absorption wavelength band in a wavelength range of 400 to 700 nm, including at least one of a specific azo-based coloring agent represented by any of General Formulae (i) to (iv) or a specific indoaniline-based coloring agent represented by General Formula (v); and a compound that generates a radical upon ultraviolet irradiation. There is also an optical filter that uses the light absorption filter and a manufacturing method for the optical filter, as well as an organic electroluminescent display device, an inorganic electroluminescent display device, or a liquid crystal display device, which includes the optical filter.

An electroluminescent display device according to an example embodiment of the present disclosure may include a substrate having an active area and a non-active area, an oxide thin film transistor disposed on the substrate, an inorganic layer disposed on the oxide thin film transistor, an organic layer disposed on the inorganic layer, at least one hole disposed in the organic layer of the non-active area, a hydrogen blocking layer disposed on the organic layer and an inner surface of the hole and a light emitting element disposed on the organic layer and including an anode, a light emitting unit, and a cathode. As a result, characteristics and reliability of the thin film transistor can be improved by preventing hydrogen from flowing into the oxide thin film transistor.

Disclosed are a display substrate and a display apparatus. The display substrate, includes base, and an organic electroluminescent display layer, a touch layer, a polarizer and a cover plate sequentially stacked on the base. The organic electroluminescent display layer and the touch layer are bonded with a first bonding layer, and the polarizer and the cover plate are bonded with a second bonding layer. The display substrate includes a camera installation area and a display area surrounding the camera installation area. A camera is installed on a side of the base away from the organic electroluminescent display layer and located in the camera installation area, a light-emitting layer is not provided in an area of the organic electroluminescent display layer corresponding to the camera installation area, and a first opening is provided in an area of the polarizer corresponding to the camera installation area.

The invention relates to polyurethane synthetic leather capable of realizing electroluminescent display and a preparation method of the polyurethane synthetic leather. The polyurethane synthetic leather comprises a polyurethane surface layer, a top transparent electrode layer, a luminescent layer, a dielectric layer, a bottom electrode layer, an adhesive layer and a synthetic leather base material layer which are sequentially stacked, the polyurethane surface layer, the luminous layer, the dielectric layer and the adhesive layer all comprise waterborne polyurethane resin, and the waterborne polyurethane resin comprises the following components: 90-100 parts of waterborne polyurethane, 0.01-0.03 part of a polyether modified siloxane wetting agent, 0.01-0.02 part of an organic silicon defoaming agent and 3-5 parts of a polyurethane associated thickening agent. The polyurethane synthetic leather can be prepared by adopting a traditional water-based synthetic leather production line, and the prepared polyurethane synthetic leather is safe and environment-friendly by optimizing a coating formula of each layer and controlling process parameters such as drying temperature, time and the like, and is high in interlayer binding force, good in wear resistance and bending resistance, high in water resistance and high in water resistance. And after thousands of times of bending and thousands of times of friction, good luminescence performance can still be maintained.

An electroluminescent display device includes a substrate including a display area and a non-display area including a gate-in-panel (GIP) area disposed outside the display area, an oxide thin-film transistor disposed above the substrate, a planarization layer disposed above the oxide thin-film transistor, an anode disposed above the planarization layer, a bank disposed above the planarization layer and including an opening portion through which a part of the anode is exposed, a plurality of dams disposed outside the GIP area and configured by the planarization layer and the bank, a buffer layer disposed above the bank and the dam and made of silicon nitride, a light-emitting part disposed on the exposed anode and the buffer layer, and a cathode disposed on the light-emitting part, thereby inhibiting hydrogen from entering an oxide thin-film transistor and improve properties and reliability of the transistor.

To compensate for degeneration of an electroluminescent display device, a method of compensating for the degeneration may include, grouping a plurality of pixels in a display panel into a plurality of pixel blocks arranged in present block rows and present block columns based on initial block boundaries, accumulating block stress values based on input image data, each accumulated block stress value representing a degeneration degree of the pixels included in each pixel block of the plurality of pixel blocks, performing a boundary updating operation on the plurality of pixel blocks, the performing the boundary updating operation including moving present block boundaries of the plurality of pixel blocks to updated block boundaries based on a distribution of the accumulated block stress values, and correcting the input image data based on the accumulated block stress values and the updated block boundaries.

Provided are: a light absorption filter comprising a quinoline compound that is unsubstituted at position 2 and has a substituent at at least one of positions 3 to 8, and that has a molecular weight of at least 200, a polymer that has a carboxy group, and a dye; and an optical filter and a method for producing the same, an organic electroluminescent display device, an inorganic electroluminescent display device, and a liquid crystal display device, in all of which the light absorption filter is used.

An electroluminescent display is disclosed. The electroluminescent display includes an electroluminescent element disposed in a display area of a substrate, an encapsulation unit disposed on the electroluminescent element, a first mesh electrode layer disposed on the encapsulation unit, an insulating layer covering the first mesh electrode layer, and a second mesh electrode layer disposed on the insulating layer. The first mesh electrode layer includes a first mesh electrode and a second mesh electrode separated from the first mesh electrode. The second mesh electrode layer includes a third mesh electrode extended in a first direction and a fourth mesh electrode extended in a second direction intersecting the first direction through the first mesh electrode intersecting the third mesh electrode.

A pixel circuit and an electroluminescent display apparatus are discussed. The pixel circuit can include a driving transistor having a gate electrode connected to a gate node and a source electrode connected to a source node, and configured to generate a driving current. The pixel circuit can further include a first light emitting device having a first anode electrode, a second light emitting device having a second anode electrode, a first emission transistor connecting the source node to the first anode electrode in an odd frame and disconnecting the source node from the first anode electrode during an even frame in response to a first emission signal, and a second emission transistor connecting the source node to the second anode electrode in the even frame and disconnecting the source node from the second anode electrode during the odd frame in response to a second emission signal.

An electroluminescent display device includes a substrate including a display area and a non-display area including a gate-in-panel (GIP) area disposed outside the display area, an oxide thin-film transistor disposed above the substrate, a planarization layer disposed above the oxide thin-film transistor, an anode disposed above the planarization layer, a bank disposed above the planarization layer and including an opening portion through which a part of the anode is exposed, a plurality of dams disposed outside the GIP area and configured by the planarization layer and the bank, a buffer layer disposed above the bank and the dam and made of silicon nitride, a light-emitting part disposed on the exposed anode and the buffer layer, and a cathode disposed on the light-emitting part, thereby inhibiting hydrogen from entering an oxide thin-film transistor and improve properties and reliability of the transistor.

This application relates to a top-emitting electroluminescent display device having a microcavity structure. The electroluminescent display device according to this application comprises a first pixel, a second pixel, and a third pixel disposed on a substrate. The first pixel comprises a first light-emitting element, a first semi-transparent layer disposed on the first light-emitting element, and a first color filter disposed on the first semi-transparent layer.

An electroluminescent display device according to an embodiment of the present invention may include: a substrate divided into a display area and a non-display area disposed outside the display area; the insulating layer is arranged above the substrate; a light emitting element disposed on the insulating layer; a bonding layer provided on the light emitting element; a package substrate disposed on the bonding layer; and a side sealing portion covering a side surface of the bonding layer and a side surface of the package substrate, thereby blocking or delaying introduction of moisture and improving reliability of the display panel.

The invention relates to an electroluminescent display, a driving circuit thereof, a pixel circuit and a control method thereof. The electroluminescent display comprises a light-emitting element array, a plurality of pixel circuits and a driving circuit. The light-emitting element array comprises a plurality of light-emitting elements which are arranged into a plurality of columns and a plurality of rows. Each pixel circuit is coupled with at least one corresponding light-emitting element and is used for supplying at least one corresponding display current to at least one corresponding light-emitting element according to at least one display signal. The driving circuit is coupled with the plurality of pixel circuits and is used for providing luminance current for the corresponding pixel circuits according to the digital luminance signals. Wherein the electroluminescent display controls the corresponding pixel circuit in a current control manner to convert the luminance current into at least one display current flowing through the corresponding at least one light-emitting element.

An electroluminescent display device includes a substrate having a display area surrounding a through-hole, and a non-display area disposed between the display area and the through-hole, a thin-film transistor disposed on an upper portion of the display area and a light-emitting element connected to the thin-film transistor, a plurality of insulating layers disposed between the substrate and the thin-film transistor, a planarization layer disposed between the thin-film transistor and the light-emitting element, and at least one anti-connection part disposed in the non-display area and including the plurality of insulating layers and the planarization layer, in which the planarization layer and the plurality of insulating layers, which constitute the anti-connection part, and each of the planarization layer and the plurality of insulating layers has an undercut shape in which a bottom surface is narrower than a top surface, so that the light-emitting part of the light-emitting element is disconnected in the through-hole by the anti-connection part, thereby penetration of moisture through the light-emitting part may be inhibited.

Disclosed is an electroluminescent display device using a variable refresh rate (VRR) mode. The purpose of the present disclosure is to reduce the occurrence of a difference in luminance at a time point of a refresh rate change, thereby preventing viewers from perceiving the variation of the refresh rate.

A driving device of an electroluminescent display apparatus, including a display panel where a pixel line including a set of pixels is provided in plurality, includes a pixel line determiner configured to select a representative pixel line, disposed at a position at which an accumulation stress caused by repetitive display of an input image is largest, from among all pixel lines, an over driving control controller configured to select a sample pixel characteristic value from among pixel characteristic values of the representative pixel line and selectively output a first ODC control signal and a second ODC control signal, based on a magnitude of the sample pixel characteristic value, and a sensing and driving circuit configured to pre-sense pixel characteristic values of the representative pixel line in the first sensing period, perform ODC sensing on the pixel characteristic values of the all pixel lines once each according to the first ODC control signal in a second sensing period succeeding the first sensing period, and perform the ODC sensing on the pixel characteristic values of the all pixel lines a plurality of times each according to the second ODC control signal in the second sensing period, wherein a sensing data voltage supplied to each pixel of the all pixel lines has multi-voltage levels, in the second sensing period for the ODC sensing.

An electroluminescence display having a repair structure comprises: a pixel comprising a thin film transistor and a light emitting diode, the thin film transistor including a semiconductor layer, a gate electrode, a source electrode, and a drain electrode, and the light emitting diode including an anode electrode that is connected to the thin film transistor; a repair element having a welding part that is configured to be connected to the thin film transistor; a planarization layer on the repair element and including a depression that overlaps the welding part of the repair element; and an organic material in the depression, wherein the anode electrode includes a first anode electrode layer and a second anode electrode layer, the first anode electrode layer including a portion that is disposed in the depression, and the second anode electrode layer being on the first anode electrode layer and the organic material.

The invention provides a method for preparing a flexible transparent electroluminescent film through solution method digital printing, and relates to the field of displayers, and the method comprises the following steps: S1, preparing alternating current luminescent material ink; s2, preparing a viscoelastic substrate; s3, ink droplets of alternating current luminescent material ink are embedded and deposited through a liquid-liquid interface to form independent luminescent display units; and S4, digitally printing the flexible transparent alternating-current electroluminescent film. According to the method, orange, green and blue three-primary-color independent light emitting and mixed color matching are adopted, deposition is accurately controlled through ink droplet formula optimization and printing parameter adjustment and through systematic ink droplet refining and interaction Newtonian fluid dynamics analysis adjustment, and repeatable manufacturing of a multi-component structure is achieved; the problem that an alternating-current electroluminescent display is compatible with transparency, flexibility and color control is solved, high-precision and multi-color flexible transparent dynamic display is achieved, and the method can be widely applied to wearable equipment and vehicle-mounted navigation.

The utility model relates to the field of organic light-emitting diodes, in particular to an anti-peeping organic light-emitting display device, a preparation method thereof and electronic equipment with an OLED display screen. The organic electroluminescence display device comprises a back plate, an electroluminescence pixel layer, a thin film packaging layer, an R cholesteric phase film layer, a G cholesteric phase film layer, a B cholesteric phase film layer, a polaroid and a covering film layer which are stacked in sequence. A red light pixel region, a green light pixel region and a blue light pixel region which are positioned at intervals by PDL are respectively arranged in the electroluminescent pixel layer; each cholesteric membrane layer is composed of a cholesteric region and a transparent region; according to the design scheme of the patterned R, G and B-CLC laminated brightness enhancement film and the design of the side-by-side and uniform pitch structure of the R, G and B-CLC Planar State region, an OLED device with low power consumption and peep-proof characteristics can be constructed.

The invention relates to the technical field of organic electroluminescence display, in particular to an efficient OLED display device and a preparation method thereof. According to the preparation method of the efficient OLED display device, the carrier mobility of the prepared OLED display device is improved by 12.4 times compared with that of a traditional device through fluorine hydroxylation modification of polyimide, bifunctional liquid crystal molecules and a synergistic process, the highest current efficiency is 92 cd / A, the service life reaches 13200 h, and the modified polyimide is good in solubility, is suitable for solution processing, and can be applied to the field of organic light emitting diode display devices, such as organic light emitting diode display devices, organic light emitting diode display devices, organic light emitting diode display devices, organic light emitting diode display devices, organic light emitting diode display devices and organic light emitting diode display devices. Equipment transformation is not needed, and the industrialization value is high.

The embodiment of the present application discloses a display panel, the display panel comprises a light-emitting layer and an adjusting layer, the light-emitting layer comprises a plurality of light-emitting unit groups arranged along a first direction, each light-emitting unit group comprises at least one light-emitting unit, and the plurality of light-emitting unit groups comprise a visual center unit group; the adjusting layer comprises a plurality of adjusting unit groups corresponding to the light-emitting unit groups; the adjusting layer is arranged on one side of the light-emitting layer; when the adjusting layer is arranged on the backlight side of the light-emitting layer, different adjusting unit groups can be arranged to have different thicknesses or different inclination angle numbers; when the adjusting layer is arranged on the light-emitting side of the light-emitting layer, different adjusting unit groups can be arranged to have different refractive indexes, so that the chroma difference of the electroluminescent display device caused by the viewing angle difference of the user is reduced, and the display effect of the display panel is further improved.

An organic EL device includes: an emitting region including a first emitting layer containing a first host material and a first luminescent compound and a second emitting layer containing a second host material and a second luminescent compound; and a hole transporting zone including one or more organic layers, in which at least one organic layer is a first organic layer in direct contact with the emitting region, the first organic layer contains a hole transporting zone material, the hole transporting zone is in direct contact with an anode and the emitting region, triplet energy of the first host material T1(H1) and the second host material T1(H2) satisfy Numerical Formula 1, and ionization potential of the hole transporting zone material Ip(HT) and the first luminescent compound Ip(D1) satisfy Numerical Formula 1X,T1(H⁢1)>T1(H⁢2)(Numerical⁢ Formula⁢ 1)Ip⁡(D⁢1)-Ip⁡(HT)<-0.05⁢eV.(Numerical⁢ Formula⁢ 1⁢X)

An electroluminescent display device includes a substrate having an emission region and a bezel region, a bank layer that extends from the emission region to the bezel region, a plurality of signal lines which are disposed on different layers on the substrate, a first metal layer that overlaps the plurality of signal lines and has a step, a second metal layer that is disposed on the first metal layer, and an intermediate layer between the first and second metal layer. A step or curvature above the first electrode may be offset by the first intermediate layer so that incident from the outside is inwardly reflected. Therefore, a failure that a user at the outside recognizes the reflected light may be solved.

Electroluminescent display device comprising the following: a substrate (100); a bank (400) configured to define an emission range (E); an emission layer (500) located in the emission area (E) defined by the bank (400); an electrode (600) arranged on the emission layer (500) and on the bank (400); and a conductive layer (700) arranged on a section of the electrode (600) which is arranged on the bench (400), wherein the substrate (100) contains an active region (AA) and a dummy region (DA) at a circumferential edge of the active region (AA), characterized in that the conductive layer (700) in the active area (AA) is arranged exclusively on the bank (400) and in the dummy area (DA) is arranged on the bank (400) and on the emission layer (500).

The present invention discloses a class of quinoacridine-5,9-diketone MR-TADF red light emitting materials and their preparation methods and applications, belonging to the technical field of organic photoelectric materials. The molecules of this type of material promote the minimization of bonding / antibonding of frontier molecular orbitals through the resonance effect generated by electron-deficient nitrogen / carbonyl and electron-rich oxygen / nitrogen. In addition, the rigid conjugated skeleton suppresses the structural relaxation of the molecular excited state and the vibration coupling between the excited state and the ground state, thereby obtaining a red light emitting material with a narrow half-width (<70nm) and high luminous efficiency; the introduction of a tert-butyl group on the periphery of the molecule can reduce the reorganization energy of the molecule; grafting different substituent units can regulate the stacking and film-forming properties of the molecule. The maximum emission peak of the obtained doped red light electroluminescent device is located at 601 nm, the half-width is 68 nm, and the corresponding maximum external quantum efficiency is 9.38%, which has a wide range of applications in the fields of organic electroluminescent displays and biological imaging.

The present invention relates to a formulation for preparing an optical layer containing a metal oxide or mixture of metal oxides. The formulation may exhibit at least one of properties as an advanced material or as a high-performance material. The formulation may be used in the nanotechnology process to make semiconductor device / display device application, for example a Liquid crystal display (LCD), Light emitting diode display (LED display), organic light emitting display (OLED), micro-LED display, quantum dot display (QLED), AR display, VR display, MR display, plasma (PDP) display, electroluminescent (ELD) display fabricated on a substrate controlled by semiconductors.

An organic electroluminescence display device includes a substrate including a first surface, a first area arranged on the first surface and including one or more first spacers and a plurality of pixels each including a light-emitting layer, a third area arranged on the first surface, surrounding the first area, and not including spacers, and a second area arranged on the first surface, surrounding the third area, and including one or more second spacers. The plurality of pixels each including the light-emitting layer is arranged along a first direction and a second direction intersecting the first direction, and a length of the third area in the second direction is a total length of pitches for at least two pixels.

The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.

An electroluminescent display apparatus may include a pixel including a driving element having a gate electrode connected to a data line and a source electrode connected to a reference voltage line and a pixel driving circuit applying a sensing data voltage to the gate electrode of the driving element through the data line, detecting a source electrode voltage of the driving element, shifted from a sensing reference voltage based on the sensing data voltage, through the reference voltage line to obtain a detection voltage, calculating an offset voltage based on the detection voltage, and lowering a level of the sensing data voltage based on the offset voltage, in a plurality of vertical blank periods.

Provided is a composition with which an optically anisotropic film exhibits reverse wavelength dispersibility and shows nx>nz>ny can be formed, an optically anisotropic film, an optical film, a circularly polarizing plate, and an organic EL display device. The composition includes a compound represented by Formula (1); and a rod-like compound, in which the compound represented by Formula (1) has a maximal absorption wavelength in a wavelength range of 300 nm or less, and the rod-like compound has a maximal absorption wavelength in a wavelength range of 330 nm or more.