242 results about "Electroluminescent display" patented technology

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.

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.

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.

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.

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.

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.

The present invention relates to an electroluminescent display device comprising an array of electroluminescent pixels consisting of a plurality of pixels deposited on a substrate (210), each pixel being formed by at least three elementary light-emitting regions, each elementary light-emitting region belonging to a different elementary light-emitting region group, each elementary light-emitting region comprising an electroluminescent stack (205) of organic layers, referred to as an "OLED stack", and a transparent upper electrode (207) placed between the control electrode (202) and the transparent upper electrode (207), the electroluminescent display device being characterized in that: two adjacent control electrodes (202a, 202b; 202b, 202c, 202c; 202c, 202a) are separated by a space (211) forming a trench, which covers at least the vertical sides of adjacent electrodes and electrically insulates them from each other, and two adjacent control electrodes (202a, 202a; the electrodes (202a, 202b, 2024, 202c) are separated by a space (211) forming the trench, which space is filled by a filling element (203) such that adjacent electrodes are electrically insulated from each other and fill the natural space between the two electrodes. In each group of basic light emitting regions, the entire OLED stack and its respective upper electrodes (205a and 207a, 205b and 207b, 205c and 207c) are separated from adjacent components belonging to the other group by an encapsulation layer (290) that protects the upper surface and sides of the OLED stack from ambient air.

One aspect of the invention relates to a method for manufacturing an electroluminescent display device comprising a step of forming a plurality of pixels, each pixel comprising a lower electrode, a support element supporting the lower electrode, an upper electrode and an active element arranged between the lower and upper electrodes, comprising forming, on a surface of a substrate, the support elements and the lower electrodes of the pixels, each support element having a height and at least one dimension, called a differentiation dimension, in a plane parallel to the plane of the substrate, each differentiation dimension being measured along a differentiation direction and being strictly less than the corresponding dimension of the lower electrode that it supports, the height of the support element being strictly greater than the sum of the thickness of the active element and the thickness of the upper electrode.Figure to be published with the abstract: Figure 15.

The utility model discloses a patterned optical film which comprises a patterned alignment layer, a liquid crystal filling layer and a polarizing layer. The patterned alignment layer is provided with a first surface and a second surface which are opposite to each other, the first surface is provided with a plurality of strip-shaped flat areas extending in the direction parallel to the film surface and a plurality of strip-shaped reflection slope areas extending in the direction parallel to the film surface, and each strip-shaped reflection slope area is arranged between the adjacent strip-shaped flat areas. The liquid crystal filling and leveling layer is formed on the first surface of the patterned alignment layer, covers the plurality of strip-shaped flat areas of the patterned alignment layer and fills and levels the plurality of strip-shaped reflection slope areas. The polarizing layer is arranged on the side, away from the pattern alignment layer, of the liquid crystal filling layer. When the patterned optical film provided by the utility model is used on the surface of a self-luminous electroluminescent display, the image contrast can be improved and the patterned optical film has metal reflection gloss when image light is displayed in a bright state.

The application discloses an equivalent sub-threshold swing regulation method of a single-gate transistor and a pixel circuit. The method comprises the following steps: obtaining a coupling control voltage based on a preset linear function relationship and a data voltage; coupling the coupling control voltage and the data voltage to obtain a coupling result; and providing the coupling result to a gate node of the single-gate transistor. The preset linear function relationship comprises a gain coefficient, and the gain coefficient is configured to program and regulate the equivalent sub-threshold swing of the single-gate transistor. Through the design of the preset linear function relationship between the data voltage and the coupling control voltage and the synergistic effect of circuit compensation, the high-precision uniformity control of the current under the low gray scale condition and the improvement of the high-resolution electroluminescent display quality are realized.

The present invention discloses an electroluminescent display substrate, a manufacturing method and a display device including the same. In one embodiment, the electroluminescent display substrate includes: a display area, a fan-out area close to the display area and a pad area away from the display area, wherein the VDD signal line and the VSS signal line of the display substrate converge to the pad area through the fan-out area, and the fan-out area includes a covering area and an exposed area arranged in sequence from the display area to the pad area, wherein the covering area covers the VDD signal line, the VSS signal line and the first interlayer insulating layer structure exposed between the VDD signal line and the VSS signal line, and the exposed area exposes the VDD signal line, the VSS signal line and the first interlayer insulating layer structure, and the fan-out area further includes: a groove structure formed in the exposed first interlayer insulating layer structure, wherein the exposed VDD signal line and the VSS signal line protrude toward each other above the groove structure; and a shielding structure protruding from the covering area to above the exposed area.

An electroluminescent display apparatus may include a first semiconductor pattern including a first channel region and a first conductive region which is a region other than the first channel region, a first gate electrode overlapping the first channel region of the first semiconductor pattern with a first gate insulation layer therebetween, a first interlayer insulation layer covering the first semiconductor pattern, and the first gate electrode, a second semiconductor pattern disposed on the first interlayer insulation layer, the second semiconductor pattern including a second channel region and a second conductive region which is a region other than the second channel region, and a second gate electrode overlapping the second channel region of the second semiconductor pattern with a second gate insulation layer therebetween. The first conductive region of the first semiconductor pattern partially overlaps the second conductive region of the second semiconductor pattern with the first interlayer insulation layer therebetween.

An electroluminescent display device includes a substrate on which a plurality of sub-pixels are defined; a first electrode in each sub-pixel on the substrate; a first hole transporting layer on the first electrode; a second hole transporting layer on the first hole transporting layer; a third hole transporting layer on the second hole transporting layer; a light-emitting material layer on the third hole transporting layer; an electron transporting layer on the light-emitting material layer; and a second electrode on the electron transporting layer, wherein the first hole transporting layer includes a P-type dopant and a first hole transporting material, the second hole transporting layer includes the first hole transporting material, and the third hole transporting layer includes a second hole transporting material, and wherein a total thickness of the first and second hole transporting layers is equal to or greater than a thickness of the third hole transporting layer.

The present disclosure provides a display apparatus. According to the present disclosure, a complex refractive layer is disposed on a side of the polarizer facing away from the electroluminescent display panel, and configured to convert the linearly polarized light into the circularly polarized light, so that the linearly polarized light in different polarization states having passed through the glass enters the complex refractive layer before entering the polarizer, the complex refractive layer converts the linearly polarized light into the circularly polarized light, and when the included angle between the film-forming stretching direction of the complex refractive layer and the first direction is an acute angle, almost all of the circularly polarized light can pass through the polarizer, thus eliminating the Mura phenomenon.