232 results about "Blue emitting" patented technology

The invention relates to display equipment which comprises a liquid crystal display panel, a backlight module and a control circuit. A backlight partition of the backlight module comprises at least one light-emitting unit, the light-emitting unit comprises a first blue light-emitting chip, a green light-emitting chip and a red light-emitting module, and the red light-emitting module comprises a second blue light-emitting chip and a red phosphor located above the second blue light-emitting chip. The control circuit is configured to obtain image frame data, determine input gray-scale values of all color pixels in an image partition corresponding to the backlight partition, and generate all color backlight values of the partition; and driving the green and second blue light-emitting chips based on the green and red backlight values, and not lightening the first blue light-emitting chip or driving the first blue light-emitting chip to carry out blue light brightness compensation based on a comparison algorithm processing result of the blue and red backlight values, thereby improving the display color cast problem. And meanwhile, driving data are generated based on the input gray-scale values of the color pixels to drive the panel, so that the display effect of the display equipment is improved.

The embodiment of the utility model discloses a backlight module and display equipment, and relates to the technical field of display. The backlight module comprises a light guide part and a lamp panel. The lamp panel comprises a circuit board, a white light-emitting unit, a red-green-blue light-emitting unit, a power line and a driving chip. The white light emitting unit includes a first blue light emitting chip and a photoluminescence portion. The red-green-blue light-emitting unit comprises a plurality of light-emitting chips, and the plurality of light-emitting chips comprise a red light-emitting chip, a green light-emitting chip and a second blue light-emitting chip. The first power supply wire is connected with the first blue light-emitting chip, the second blue light-emitting chip and the green light-emitting chip, and the second power supply wire is connected with the red light-emitting chip. In the width direction of the circuit board, the power line and the driving chip are arranged on the two sides of the light-emitting unit respectively. According to the embodiment of the invention, the light-emitting effect of the lamp panel can be improved, and the connection convenience of the light-emitting unit, the power supply wire and the driving chip is improved.

The invention discloses an organic light-emitting device which comprises a first electrode, a second electrode and an organic layer located between the first electrode and the second electrode, and the organic layer at least comprises a light-emitting layer and an electron transport layer structure. Wherein the light-emitting layer comprises a mixture of compounds shown in the following formula I and having different deuteration rates; and the structure of the electron transport layer comprises a compound shown in the following formula II. The service life of the blue light-emitting device can be remarkably prolonged by matching the structures of the light-emitting layer and the electron transport layer.

The invention provides a projection optical system. The projection optical system comprises a lens barrel and a color combination prism assembly which are sequentially arranged from the imaging side to the image source side in the optical axis direction. A lens group and a spacing assembly are accommodated in the lens barrel; the lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from the imaging side to the image source side in the optical axis direction. The spacing assembly comprises first, second and third spacing elements; the color combination prism assembly comprises a color combination prism, a red light-emitting chip, a green light-emitting chip and a blue light-emitting chip; a blue light band-pass filtering film and a red light band-pass filtering film are respectively arranged on two diagonal surfaces of the color combination prism; the green light-emitting chip is perpendicular to the optical axis, and the red light-emitting chip and the blue light-emitting chip are parallel to the optical axis; the projection optical system also satisfies the following conditions: (CT1 + CT2) / CP1 is more than 0.90 and less than 1.65; 4.90 < d2m / (T23 + CT3) < = 7.30; and 5.50 < d3s / T34 < 9.80.

The embodiment of the invention discloses display equipment and a control method of the display equipment, and relates to the technical field of display, first target backlight data is generated directly according to initial backlight data and preset component data under the condition that a brightness enhancement condition is not met, and the first target backlight data is generated directly according to the preset component data under the condition that the brightness enhancement condition is met. Second target backlight data is obtained according to the first gain coefficient, the initial backlight data and the preset component data, at least one of the red light-emitting light source, the green light-emitting light source and the blue light-emitting light source emits light under the condition that the gray field picture or the white field picture is displayed, and the brightness enhancement condition is met under the condition that the brightness enhancement condition is met. The brightness increasing proportion of the emergent light corresponding to at least one of the red light, the green light and the blue light is close to the brightness increasing proportion of the emergent light corresponding to the white light, backlight supply is achieved through the light-emitting light sources corresponding to the red light, the green light, the blue light and the white light respectively, the energy consumption of the display device is reduced, and meanwhile the display effect of the display device is guaranteed.

The embodiment of the invention discloses a display device and a control method of the display device, and relates to the technical field of display, the display device comprises a backlight module, a liquid crystal panel and a backlight driving circuit, the backlight driving circuit determines target backlight data according to initial backlight data and preset reference data, and a first target color coordinate is taken as a reference, so that the first target color coordinate is obtained; the initial backlight data is converted into target backlight data, color cast caused by conversion is reduced, and meanwhile, under the condition that the initial backlight data is backlight data corresponding to a white field picture or a gray field picture, the target backlight data obtained through conversion can make at least one of a red light-emitting light source, a green light-emitting light source and a blue light-emitting light source emit light; therefore, the light-emitting color cast phenomenon of the white light-emitting source is improved. Backlight supply is achieved through the light-emitting light sources corresponding to red, green, blue and white, so that the energy consumption of the display device is reduced, and meanwhile the display effect of the display device can be guaranteed.

The invention relates to display equipment which comprises a liquid crystal display panel, a backlight module and a control circuit. A backlight partition of the backlight module comprises at least one light-emitting unit, the light-emitting unit comprises a red light-emitting chip, a green light-emitting chip and a light-emitting module, and the light-emitting module comprises a blue light-emitting chip and a red phosphor located above the blue light-emitting chip. The control circuit is configured to obtain image frame data, determine input gray-scale values of all color pixels in an image partition corresponding to the backlight partition, and generate all color backlight values of the partition; and driving the green and blue light-emitting chips based on the green and blue backlight values, and not lightening the red light-emitting chip or driving the red light-emitting chip to perform red light brightness compensation based on a comparison algorithm processing result of the blue and red backlight values, thereby improving the display color cast problem. And meanwhile, driving data are generated based on the input gray-scale values of the color pixels to drive the panel, so that the display effect of the display equipment is improved.

The present invention discloses a blue luminescent compound, a blue luminescent composition, and an organic electroluminescent device, display device and lighting device comprising the blue luminescent compound or blue luminescent composition. The blue luminescent compound is selected from one of the following structures. The blue luminescent compound provided by the present invention is used as a host material in a blue luminescent layer. A triplet-triplet fusion process (TTF effect) of the material is improved by using an α-naphthalene substituent. The theoretical exciton utilization rate of the material is increased to 62.5%. The electron transmission rate of the material is improved by introducing an oxygen atom with a large electronegativity, thereby improving the carrier balance. Furthermore, by deuteration of at least part of naphthyl and an anthracene nucleus and combination with semi-deuterated dibenzofuran, the thermal stability of the material is significantly enhanced and at the same time an exciton energy rise caused by vibration in the material is reduced, thereby weakening the problems of damage and deterioration of a material in an adjacent layer by excitons, so that the lifetime of the organic electroluminescent device can be significantly improved, and defects in the prior art are overcome.

The invention discloses a blue light-emitting main body composition and an organic electroluminescent device comprising the same. The blue light-emitting main body composition at least comprises a first main body compound, a second main body compound and a third main body compound; the structure of the first host compound is as shown in a formula I, the structure of the second host compound is as shown in a formula II, and the structure of the third host compound is as shown in the formula I or the formula II; the first host compound, the second host compound, and the third host compound are different from each other. When the blue light-emitting main body composition provided by the invention is used as a light-emitting layer main body material to be applied to a blue organic light-emitting device, the driving voltage of the device can be obviously reduced, the service life of the device can be obviously prolonged, and the service life of the device can be obviously prolonged under continuous working conditions. The organic light-emitting device prepared from the blue light-emitting main body composition provided by the invention is relatively stable in voltage efficiency and service life. I, II

The invention provides a display module, a preparation method thereof and a display device, relates to the technical field of display, and improves the material utilization rate. The display module comprises an array substrate, a blue light-emitting layer, a first electrode layer, a color conversion layer, a second electrode layer and a third electrode layer, the color conversion layer is located on the side, away from the array substrate, of the first electrode layer and comprises a plurality of light conversion units, and the light conversion units comprise coupling quantum dots; the orthographic projection of the blue light-emitting layer and the orthographic projection of the light conversion units on the array substrate are at least partially overlapped, so that blue light emitted by the blue light-emitting layer excites one part of the light conversion units to emit red light, and under the combined action of the blue light, the first electrode layer and the second electrode layer, the other part of the light conversion units emit green light, and therefore full colors of red, green and blue are achieved. And the color conversion layer can be obtained only by preparing a coupling quantum dot material once, namely, photoetching film forming once is only needed, so that the material waste is greatly reduced, and the material utilization rate is improved.

A multifunction toy is provided in the present disclosure. A red light-emitter is arranged on a main body and capable of emitting red light. A blue light-emitter is arranged on the main body and capable of emitting blue light. A green light-emitter is arranged on the main body and capable of emitting green light. A first switch is connected to the red light-emitter and configured to control a turning on and off and a brightness of the red light-emitter. A second switch is connected to the blue light-emitter and configured to control a turning on and off and a brightness of the blue light-emitter. A third switch is connected to the green light-emitter and configured to control a turning on and off and brightness of the green light-emitter. The lampshade is opaque, allows light to pass through, and covers the red light-emitter, the blue light-emitter, and the green light-emitter.

An embodiment of the present application provides an OLED device and a display device. The OLED device includes a substrate, an OLED unit disposed on the substrate, and a packaging film covering the OLED unit. The OLED unit includes a plurality of light-emitting elements, and the plurality of light-emitting elements include at least one red light-emitting element, at least one green light-emitting element, and at least one blue light-emitting element. The packaging film includes an organic film layer and at least two inorganic film layers. Each film layer is configured by thickness and refractive index so that the color shift locus of the white light image quality of the OLED device extends in the cyan direction during the process of increasing the viewing angle. Thereby, the colors visually observed by the user are always maintained in the cool color system, reducing the color system change, and thus improving the visual effect. In addition, both cyan and white belong to the cool color system, and the extension of the color shift locus in the cyan direction will not cause obvious discomfort to the user, and the user can obtain a better visual experience.

The invention discloses a display panel and a display device, and belongs to the technical field of display. The display panel comprises a substrate, a plurality of sub-pixels and an optical film layer, wherein the sub-pixels and the optical film layer are located on the substrate. Wherein the sub-pixels comprise light-emitting structures, the sub-pixels comprise a first sub-pixel, a second sub-pixel and a third sub-pixel, the first sub-pixel is a red sub-pixel, the optical film layer comprises a plurality of optical structures corresponding to the sub-pixels, the light-emitting structure of the first sub-pixel is a green light-emitting structure, and the light-emitting structure of the second sub-pixel is a green light-emitting structure. The optical structure corresponding to the first sub-pixel comprises a red quantum dot. The green light-emitting structure can be used for exciting the red quantum dots to emit red light, and the photon number of the green light-emitting structure under the unit current density is larger than that of the blue light-emitting layer, so that the excitation efficiency of the green light-emitting structure on the red quantum dots is higher than that of the blue light-emitting layer on the red quantum dots; therefore, the brightness of the display panel can be improved.

A light-emitting substrate includes a base substrate, a light-emitting unit and a light extraction member arranged in sequence. The light-emitting unit includes at least one blue light-emitting device, a first light enhancement layer and a second light enhancement layer arranged in sequence. A blue light-emitting device includes a first electrode, at least one blue light-emitting layer and a second electrode sequentially stacked. An orthographic projection of the light extraction member on the base substrate at least partially overlaps with an orthographic projection of the blue light-emitting device on the base substrate. An absolute value of a difference between a wavelength corresponding to a transmittance peak of the light extraction member and a wavelength corresponding to an emission spectrum peak of the blue light-emitting device is less than or equal to 10 nm.

The present application relates to the technical field of organic optoelectronic materials and devices, in particular to a preparation method of white organic light-emitting diodes based on a kind of blue, yellow and other color cMa copper (I) TADF complex with nitrogen heterocyclic carbene-copper-arylamines structure, including three steps: first, synthesis of cMa type copper (I) TADF complex containing blue light emitter and yellow light emitter as representative, obtained by ligand selection, intermediate preparation and purification;Second, construct layered WOLEDs device, from bottom to top in turn for substrate, ITO anode, hole injection layer, hole transport layer, buffer layer, yellow light emitting layer, blue light emitting layer, electron transport layer, electron injection layer and Al cathode;Third, through substrate pretreatment, mbar high vacuum evaporation and nitrogen glove box packaging complete device preparation.The WOLEDs device W1, W2 prepared by the present application has excellent photoelectric performance, the CRI is up to 83, the maximum external quantum efficiency is greater than or equal to 13.3%, has good stability and low cost, and is suitable for lighting and display fields.

The application discloses a display panel, a manufacturing method thereof and an evaporation device, and belongs to the technical field of display. The display panel comprises a plurality of light-emitting parts, and each light-emitting part comprises a plurality of stacked unit material layers. The density of at least one of the blue light-emitting part and the green light-emitting part is greater than the density of the red light-emitting part, and the density is the ratio of the number of unit material layers in the light-emitting part to the thickness of the light-emitting part. Since the more the number of unit material layers in the light-emitting part is, the more uniform the doping degree of the at least two light-emitting materials in the light-emitting part is, and the higher the probability of the recombination of holes and electrons in the light-emitting part to form excitons is, the longer the light-emitting life of the light-emitting part is without changing the overall thickness of the light-emitting part, therefore, the light-emitting life of at least one of the blue light-emitting part and the green light-emitting part can be improved by increasing the density of at least one of the blue light-emitting part and the green light-emitting part, so that the light-emitting life of the blue light-emitting part, the green light-emitting part and the red light-emitting part is relatively close.

This application provides a display panel. The display panel includes multiple pixel units, each pixel unit including a red area, a green area, and a blue area. The display panel includes a substrate, a blue light-emitting device, an encapsulation layer, and a quantum dot film. The quantum dot film includes red and green quantum dot color areas and a light-transmitting area. The red quantum dot color area is located in the red area and emits red light when excited by blue light emitted by the blue light-emitting device. The green quantum dot color area is located in the green area and emits green light when excited by blue light emitted by the blue light-emitting device. The light-transmitting area is located in the blue area and is configured to transmit blue light emitted by the blue light-emitting device. The display panel also includes a light conversion layer disposed between the encapsulation layer and the quantum dot film. The light conversion layer converts the downward-emitted red and green light into blue light, thereby reducing the superposition and interference between different colors of light emitted by the quantum dot film and improving the color purity of the display panel.

To provide a red light-emitting device that emits red light using a blue light-emitting element (blue LED) and a phosphor, and that has dramatically improved brightness.SOLUTION: A light-emitting device that emits red light includes a blue light-emitting element, a first phosphor, and a second phosphor. The light-emitting device has a peak emission wavelength of 615 nm or more and 690 nm or less. When the emission intensity of the light-emitting device at the peak emission wavelength is taken as 100%, the light-emitting device satisfies all of the following: an emission intensity at an emission wavelength of 580 nm is 20% or less, an emission intensity at an emission wavelength of 700 nm is 50% or less, and the maximum emission intensity at emission wavelengths from 400 nm to 500 nm is 5% or less.SELECTED DRAWING: Figure 1

Organic light-emitting diodes and organic light emitting devices including the same are described. The organic light emitting diode can include a first electrode; a second electrode facing the first electrode; and a first blue emitting material layer including a first compound, a second compound and a third compound and positioned between the first and second electrodes. The first compound is an n-type host, the second compound is a p-type host, and the third compound is a dopant or an auxiliary host.

With this invention, advantages of a tandem structure in a light-emitting element of a light-emitting device can be satisfactorily demonstrated. A blue light-emitting element (120B) among light-emitting elements (120R, 120G, 120B) of three colors in a light-emitting device (110) includes a tandem light-emitting unit, and the ratio of the thickness of a first blue light-emitting layer (34B) to the thickness of a second blue light-emitting layer (53B) in the unit is greater than 1 / 15 and less than 4 / 15.

A display device including a backlight unit is provided. The backlight unit can provide light to a liquid crystal panel. For example, the backlight unit may include a blue light source arranged side by side on an optical substrate. A blue light-emitting sheet and a color conversion sheet may be stacked sequentially on the blue light source. The color conversion sheet can emit light of colors other than blue in all directions using blue light emitted from the blue light source. The blue light can be diffused in all directions by the blue light-emitting sheet. Therefore, in the display device, spots can be prevented due to the difference in the direction of travel of blue light and light of colors other than blue.

The invention provides a luminescent material with aggregation-induced emission, thermochromic and photochromic properties as well as a preparation method and application thereof, and belongs to the technical field of photoresponse materials. The luminescent material provided by the invention almost has no photoluminescence phenomenon in a pure DMSO solvent, but emits strong cyan light once in an aggregation state, and the aggregation-induced emission effect is extremely obvious; from the aspect of temperature response characteristics, the luminescent material is blue in a low-temperature environment of 77K, is turquoise under a room-temperature condition, shows different optical properties at different temperatures, and is remarkable in thermoluminescence discoloration effect; meanwhile, the solid powder of the luminescent material initially shows turquoise luminescence, after the solid powder is irradiated by 365nm ultraviolet light for 2 minutes, the turquoise luminescence can be converted into blue luminescence, and the photoluminescence discoloration effect is outstanding.

A display device includes a substrate, a plurality of interconnects disposed on the substrate, and a plurality of light-emitting elements arranged on the substrate and electrically connected to the plurality of interconnects. The plurality of light-emitting elements include a red light-emitting element configured to emit red light, a green light-emitting element configured to emit green light, and a blue light-emitting element configured to emit blue light. A wall is provided around a light-emitting element selected from the red light-emitting element, the green light-emitting element, and the blue light-emitting element, so as to control light emitting from the selected light-emitting element.

A display device and a method for manufacturing a display device including a first sub-pixel, a second sub-pixel, and a third sub-pixel are provided. The display device includes: a substrate; and the first to third sub-pixels disposed on the substrate. The first sub-pixel includes: a first anode electrode disposed on the substrate; and a hole transport layer, a red light-emitting material layer, a green light-emitting material layer, a blue light-emitting material layer, and an electron transport layer sequentially stacked on the first anode electrode. The second sub-pixel includes: a second anode electrode disposed on the substrate; and a hole transport layer, a green light-emitting material layer, a blue light-emitting material layer, and an electron transport layer sequentially stacked on the second anode electrode. The third sub-pixel includes: a third anode electrode disposed on the substrate; and a hole transport layer, a blue light-emitting material layer, and an electron transport layer sequentially stacked on the third anode electrode.

The present invention discloses a blue luminescent composition and an organic electroluminescent device comprising the blue luminescent composition. The blue luminescent composition comprises a host material with a general structural formula as represented by Formula I and a guest material with a general structural formula as represented by Formula II. In the present invention, a composition composed by rational combination of a compound containing a dibenzofuran group and deuterium-substituted anthracene as a host material and a compound containing a cycloalkyl group and a steric hindrance group such as thiophene as a guest material is capable of significantly enhancing the stability and lifetime of a blue-light organic electroluminescent device while enhancing the electron migration and transfer efficiency and eliminating a host luminescence phenomenon.

The invention belongs to the technical field of organic electroluminescent materials, and particularly discloses a blue luminescent material based on benzotri (triazole). The novel blue light-emitting material is synthesized by taking benzotri (triazole) as a molecular structure center and then respectively taking bis (3, 5-di-tert-butylphenyl) amine, bis (3, 5-diphenyl) amine, bis (3, 5-dimethoxyphenyl) amine, 9, 9-dimethyl acridine, 3, 6-di-tert-butylcarbazole or 4, 4-difluorodiphenylamine as electron-donating groups. Due to a relatively large torsion angle between a donor and an acceptor, the overall planarity of molecules is reduced, so that the molecular accumulation is favorably inhibited, and the quenching of excitons is further reduced; a central core of triazole has a relatively rigid structure, so that relatively high fluorescence quantum yield (PLQY) can be provided, and blue light emission with short wavelength of 434-486nm is realized; and the method has important significance for constructing a novel blue light-emitting material.

A display panel includes a display region and a non-display region. The display panel includes a base substrate and a light-emitting unit. The light-emitting unit is located on a side of the base substrate. The light-emitting unit includes a plurality of light-emitting devices. The plurality of light-emitting devices include a plurality of red light-emitting devices, a plurality of green light-emitting devices and a plurality of blue light-emitting devices. A ratio of a sum of light exit areas of the plurality of blue light-emitting devices to an area of the display region of the display panel is greater than or equal to 4% and less than or equal to 25%.

An OLED display panel comprising a first electrode (101, 201, 301) and a second electrode (102, 202, 302), at least one light-emitting layer (103, 203, 303, 503, 603) arranged between the first electrode (101, 201, 301) and the second electrode (102, 202, 302); a first functional layer (104, 204, 304) and a second functional layer (105, 205, 305) arranged on either side of the respective light-emitting layer; wherein the first functional layer (104, 204, 304) comprises at least one compound having hole transport capability; and the second functional layer (105, 205, 305) comprises at least one compound having electron transport capability; wherein in the at least one light-emitting layer (103, 203, 303, 503, 603) an organic light-emitting compound is doped with a thermally activated delayed fluorescence material in at least one of the light-emitting layers (103, 203, 303, 503, 603); where the lowest triplet energy level of the organic light-emitting compound (T H ) is higher than the lowest singlet energy level of the thermally activated material (S T ) delayed fluorescence; where the lowest triplet energy level of the compound with hole transport capability (T1) and the lowest triplet energy level of the organic light-emitting compound (T H ) satisfy the following formula (I): T 1 − TH > − 0.2 eV where the lowest triplet energy level of the compound with electron transport capability (T2) and the lowest triplet energy level of the organic light-emitting compound (T H ) satisfy the following formula (II): T 2 − TH > − 0.2 eV wherein the at least one light-emitting layer (103, 203, 303, 503, 603) comprises at least one blue light-emitting layer; wherein the blue light-emitting layer comprises at least one high-energy organic light-emitting compound, at least one low-energy organic light-emitting compound, and a thermally activated delayed fluorescence material doped therein; wherein the lowest singlet energy level of the high-energy organic light-emitting compound is higher than the lowest singlet energy level of the thermally activated delayed fluorescence material; where the lowest singlet energy level of the low-energy organic light-emitting compound is lower than the lowest singlet energy level of the thermally activated delayed fluorescence material.

A display device includes a substrate; and first to third sub-pixels disposed on the substrate, wherein the first sub-pixel includes: a first anode electrode disposed on the substrate; and a hole transport layer, a red light-emitting material layer, a green light-emitting material layer, a blue light-emitting material layer, and an electron transport layer sequentially stacked on the first anode electrode, wherein the second sub-pixel includes: a second anode electrode disposed on the substrate; and a hole transport layer, a green light-emitting material layer, a blue light-emitting material layer, and an electron transport layer sequentially stacked on the second anode electrode, wherein the third sub-pixel includes: a third anode electrode disposed on the substrate; and a hole transport layer, a blue light-emitting material layer, and an electron transport layer sequentially stacked on the third anode electrode.

The application discloses a blue light-emitting host composition and an organic electroluminescent device comprising the same. The blue light-emitting host composition comprises at least a first host compound, a second host compound and a third host compound; the structure of the first host compound is shown as formula I, the structure of the second host compound is shown as formula II, and the structure of the third host compound is shown as formula I or formula II; the first host compound, the second host compound and the third host compound are not the same as each other. The blue light-emitting host composition provided by the application is applied to a blue organic electroluminescent device as a light-emitting layer host material, which can obviously reduce the driving voltage of the device, significantly prolong the service life of the device, and the voltage efficiency and the service life of the organic electroluminescent device prepared from the blue light-emitting host composition provided by the application are relatively stable under continuous working conditions.I, II.