324 results about "Blue emitting" patented technology

The invention discloses a blue light-emitting main body composition, and an organic electroluminescent device, a display panel and a display device comprising the same. The blue light-emitting main body composition comprises a first component and a second component, the structural general formula of the first component is shown as a formula I, and the structural general formula of the second component is shown as a formula II; ar1 is selected from deuterated or unsubstituted phenyl or naphthyl; l is selected from deuterated or non-deuterated phenyl; and Ar22 is a deuterated structure of Ar21. In the invention, the compound in the formula I containing the deuterated anthracene nucleus and the non-deuterated Ar21 group is combined with the compound in the formula II containing the non-deuterated anthracene nucleus and the deuterated Ar22 group in a differentiated manner, so that the carrier balance of the organic electroluminescent device can be further adjusted, the efficiency of the organic electroluminescent device is improved, and the service life of the organic electroluminescent device is prolonged. # imgabs0 #

The invention discloses an organic compound containing naphthenic fluorene and dibenzofuran, a blue light-emitting composition containing the organic compound and an organic electroluminescent device. The structural general formula of the organic compound is as shown in formula I in the specification. According to the organic compound, electron-rich substituent naphthenic fluorene and electron-deficient substituent dibenzofuran are introduced to specific positions on a boron-nitrogen molecular skeleton, so that electron and hole recombination energy of guest material molecules can be reduced, the transmission capability of carriers on the guest material molecules is improved, the guest material molecules are prevented from becoming traps in carrier transmission, and the transmission efficiency of the guest material molecules is improved. Therefore, the carrier transport process of the light-emitting layer is improved to a certain extent, the guest material is prevented from forming polaritons, the light-emitting efficiency of the light-emitting layer is improved, the host material with the anthracene parent nucleus as the characteristic is used in cooperation, stacking and molecular orientation between the host and the guest can be improved, the carrier transport process and the light-emitting process are improved, and the light-emitting efficiency of the light-emitting layer is improved. Therefore, the organic light-emitting device provided by the invention has more excellent efficiency performance on a top-emitting device. # imgabs0 #

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 invention discloses a white organic light-emitting device and a display device, the white organic light-emitting device comprises a first electrode, a second electrode and a light-emitting layer located between the first electrode and the second electrode, the light-emitting layer comprises a green light-emitting layer, a blue light-emitting layer and a plurality of red light-emitting layers which are distributed in a stacked mode, the red light-emitting layer is in contact with the green light-emitting layer; along the direction close to the green light-emitting layer, the hole mobility of the red light-emitting layers is gradually reduced, and the electron mobility of the red light-emitting layers is gradually enhanced. The white organic light-emitting device provided by the embodiment of the invention can effectively improve the color cast problem under high current density.

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.

A display device having a wide color gamut includes a backplane, a light emitting group, a protective layer, and a color conversion structure. The light emitting group is disposed on the backplane, and includes a plurality of blue light emitting elements arranged at intervals. The protective layer encapsulates the blue light emitting elements in a lateral direction to expose their light emitting surfaces. The color conversion structure is disposed on the light emitting group to convert light from one portion of the blue light emitting elements into red light and green light and allow light from another one portion of the blue light emitting elements to pass through. The protective layer has a transmittance of 10% or less of light having a wavelength greater than 380 nm and less than 500 nm.

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 discloses a polymer-doped blue organic long-afterglow material as well as a preparation method and application thereof, and relates to the field of organic long-afterglow materials, and the polymer-doped blue organic long-afterglow material is prepared from a polymer, a host material and a guest material through solvent evaporation; the polymer is polymethyl methacrylate; the main body material is an electron-rich material diphenylamine derivative; the object material is an electron-rich carbazole derivative, the prepared material belongs to an organic afterglow material and can meet the application requirements in the fields of information encryption, high-end anti-counterfeiting and the like, research on the polymer-doped blue organic long-afterglow material provides a new thought for design and synthesis of a novel blue light-emitting long-afterglow material, and the application prospect of the polymer-doped blue organic long-afterglow material is wide. And a theoretical basis and a material basis can be provided for practical applications such as data encryption and afterglow anti-counterfeiting.

The invention belongs to the technical field of fluorescent probes, and provides a design strategy of a molecularly imprinted polymer ratiometric fluorescent probe based on two-color carbon dots in order to solve the problems that a current molecularly imprinted polymer fluorescent probe based on a single emission carbon dot is poor in detection result precision and is easily influenced by external environment interference and operation errors and the like. The fluorescent probe can be used for detecting catechol. The blue light-emitting carbon dots and the yellow light-emitting carbon dots are synthesized through traditional hydro-thermal synthesis; on the basis of blue luminous carbon dots, a molecularly imprinted polymer based on the blue luminous carbon dots is synthesized through a sol-gel method, and the molecularly imprinted polymer is combined with yellow luminous carbon dots through physical action. The ratiometric fluorescence strategy has the advantages of rapidness, effectiveness, stable performance, strong anti-interference capability, no need of expensive instruments and equipment, simplicity and convenience in operation, low detection cost and the like, solves the problem of low selectivity of single-fluorescence carbon dot detection, increases signal sources of imprinted polymer detection, and more importantly, reduces background interference due to colorimetric imprinting, so that the detection efficiency is improved. And the detection accuracy is improved.

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 utility model relates to the technical field of LED (light-emitting diode) chip packaging, in particular to an LED package of a flip chip, which comprises a PCB (printed circuit board) substrate, a connecting seat is fixedly connected onto the PCB substrate, the PCB substrate is positioned in the connecting seat and is connected with a blue light-emitting chip, a green light-emitting chip and a red light-emitting chip, and the blue light-emitting chip, the green light-emitting chip and the red light-emitting chip are arranged in the connecting seat. The blue light-emitting chip and the green light-emitting chip are arranged in an inverted mode, a sealing cover is detachably connected to the connecting base, a light-transmitting mirror is connected to the inner bottom of the connecting base, protective covers are connected to the outer sides of the blue light-emitting chip, the green light-emitting chip and the red light-emitting chip, and the protective covers are located in the light-transmitting mirror. An arc-shaped groove is formed in the top of the protective cover, and triangular clamping blocks are slidably connected to the two sides of the sealing cover; according to the utility model, the use cost can be reduced, the situation that one part is damaged and the whole LED needs to be replaced is avoided, meanwhile, the light source utilization rate is improved, and water vapor and dust are prevented from invading and influencing the service life of a chip.

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 white light emitting layer material and a white light organic electroluminescent device, and belongs to the technical field of organic electroluminescent devices. The white light emitting layer material is composed of a red light emitting layer, a green light emitting layer and a blue light emitting layer in sequence or composed of a yellow light emitting layer and a blue light emitting layer in sequence. The red light-emitting layer is composed of a TADF host material and a red phosphorescent light-emitting material; the green light-emitting layer is composed of a TADF host material and a green phosphorescent light-emitting material; the blue light-emitting layer is composed of a host material containing phosphorus-oxygen double bonds and a blue TADF light-emitting material; the yellow light-emitting layer is composed of a TADF host material and a yellow phosphorescent light-emitting material. The white light emitting layer material has spectrum coverage with the emission wavelength of 400-780 nm, and when the white light emitting layer material is applied to a white light organic electroluminescent device, the device has the advantages of low turn-on voltage, low color temperature, low efficiency roll-off, high efficiency, high color rendering index and excellent color stability.

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.

A display device that uses one or more light coupling layers is described herein, along with methods of making such devices. One device includes an array of blue light emitting elements formed on a substrate, a light coupling material formed over the array of blue light emitting elements, and a quantum dot light converting material disposed in a portion of a pixel structure formed over the array of blue light emitting elements. The light coupling material has a high refractive index and may be, or include, a polymer material.

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

The invention discloses a pixel structure for improving the brightness of a light-emitting element and prolonging the service life of the light-emitting element, which comprises a substrate, the substrate is provided with a plurality of light-emitting pixel areas, and each light-emitting pixel area is internally provided with a red light-emitting pixel point, a blue light-emitting pixel point and a green light-emitting pixel point, the red light-emitting pixel points and the green light-emitting pixel points are of organic light-emitting structures, and the blue light-emitting pixel points are of quantum dot light-emitting structures. The problems that the luminance, efficiency, service life and other properties of an existing blue OLED still need to be improved, and the service life is affected by the luminous efficiency in the blue OLED are solved.

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.