76 results about "Color purity" patented technology

The invention discloses a double-boron polycyclic compound for an organic electroluminescent device, and belongs to the technical field of organic electroluminescent materials. The double-boron polycyclic compound takes a spiro derivative as a center B atom to be directly bonded with N, O, S and Se, has relatively high singlet and triplet energy, proper HOMO and LUMO energy levels and relatively small singlet-triplet energy difference, and can be used as a luminescent material to be applied to an organic electroluminescent device to improve the luminous efficiency of the device and improve the color purity of the device. After the double-boron polycyclic compound is applied to an OLED as a luminescent material, the relative value of external quantum efficiency of a luminescent device is 105.6%-126.9%, the half-peak width is 22-29 nm, and compared with an OLED using BD01 as the luminescent material, the luminescent efficiency is obviously improved, the half-peak width of an emission spectrum is narrower, and the color purity is higher. The invention provides an MR-TADF material for improving the color purity of a blue light device.

The invention provides a light emitting diode with improved color purity and a preparation method thereof, and belongs to the technical field of photoelectron manufacturing. The light-emitting diode comprises a first semiconductor layer, a first light-emitting layer, a second light-emitting layer and a second semiconductor layer which are sequentially stacked, the first light-emitting layer is a green light-emitting layer, the second light-emitting layer is a blue light-emitting layer, and the ratio of the light-emitting intensity of the first light-emitting layer to the light-emitting intensity of the second light-emitting layer ranges from 2: 10 to 4.8: 10. According to the embodiment of the invention, the color gamut value of the light-emitting diode can be improved, the color purity of the light-emitting diode can be improved, and the light-emitting effect is improved.

The invention discloses a high-color-purity near ultraviolet heat exciton compound with circular polarization property and application thereof in preparation of a circular polarization organic electroluminescent device, and belongs to the technical field of organic photoelectric materials. The electroluminescent material disclosed by the invention is a high-color-purity near ultraviolet heat exciton compound with circular polarization property, and two pairs of near ultraviolet enantiomers are successfully designed and synthesized by combining a chiral group binaphthol, a weak donor dibenzothiophene, dibenzofuran and an acceptor cyanophenyl; the compounds show obvious circular polarization luminescence property and high fluorescence quantum yield. The electroluminescent devices prepared based on the enantiomers all show near ultraviolet emission, CIE coordinates are respectively (0.168, 0.040) and (0.166, 0.040), and the external quantum efficiencies are respectively 4.3% and 3.4%. According to the near ultraviolet heat exciton material, a new visual angle is provided for developing the near ultraviolet heat exciton material with circular polarization luminescence and high color purity at the same time, and 3D and wide color gamut display can be directly achieved in the future.

Image data analysis, and particularly identifying cluster or polony locations for performing base-calling in a digital image of a flow cell during DNA sequencing is described. A method may include generating a first plurality of flow cell images of a cellular sample immobilized on a support by conducting one or more cycles of sequencing reactions. The cellular sample may include a plurality of concatemer molecules therewithin. For the first plurality of flow cell image, pixel intensities, and a respective color purity of each of the pixel intensities may be determined. A base calling template may include base calling locations based on the pixel intensities and the respective color purity of the pixel intensities. The base calling template may be for registering a second plurality of flow cell images of the support in one or more subsequent cycles of the one or more cycles.

Embodiments of the present invention relate to an organic electronic device capable of ensuring high luminous efficiency, low driving voltage and high heat resistance, and improving color purity or lifespan.

The invention discloses a display panel, a preparation method thereof and a display device. The display panel comprises a back plate (1); the first light-emitting device (2), the second light-emitting device (3) and the third light-emitting device (4) are arranged on the same side of the back plate (1), the distance between the second light-emitting device (3) and the back plate (1) is larger than the distance between the first light-emitting device (2) and the back plate (1), and the distance between the third light-emitting device (4) and the back plate (1) is larger than the distance between the second light-emitting device (3) and the back plate (1). The first light-emitting device (2) emits light of a first color, the second light-emitting device (3) emits light of a second color, and the third light-emitting device (4) emits light of a third color; the first light filtering layer (5) is arranged on one side, deviating from the back plate (1), of the first light emitting device (2), and only light of a first color can penetrate through the first light filtering layer (5); the second light filtering layer (6) is arranged on the side, away from the back plate (1), of the second light emitting device (3), the second light filtering layer (6) can only transmit light of the second color, or the second light filtering layer (6) can only transmit light of the first color and the second color. The color purity and the color gamut of the display panel are good.

Provided is an anti-myopia paper sheet capable of effectively preventing eyestrain during reading or writing and reducing a reflectance factor of page reflected light, belonging to the field of stationery products. A number of graphic color blocks are printed all over a printed area for writing of the paper sheet, and each graphic color block is a graphic color block combination of any two colors of light yellow, light green, or light blue. A wavelength of reflected light in the printed area ranges from 538 nm to 590 nm, the brightness ranges from 58% to 72%, and a reflectance factor at 400 nm ranges from 48% to 60%. A page in the printed area has color purity ranging from 6% to 18%. The stimulation of full-frequency light to eyes is effectively prevented, and thus the myopia prevention is achieved.

An embodiment of the present invention is directed to an organic electronic device capable of ensuring high luminous efficiency, low driving voltage, and high heat resistance and improving color purity or lifespan.

The invention relates to a dendritic sensitizer and an electroluminescent device thereof, and belongs to the field of organic luminescent materials. The technical problem that the efficiency and the color purity of an existing organic light-emitting device are difficult to synergistically improve is solved. According to the invention, a dendritic compound with a broadband system and a high reverse intersystem crossing rate is used as a sensitizer, a dendritic donor unit is used as a branch, a cyanophenyl unit is used as an acceptor central core, a relatively small single triplet state energy level difference is achieved, a thermal activation delayed fluorescence effect can be generated, triplet state excitons can cross to a singlet state in a reverse intersystem manner, and the quantum efficiency is improved. And then energy is transferred to a luminescent dye with a narrow band characteristic through # imgabs0 # energy transfer, so that the organic electroluminescent device based on the dendritic sensitizer provided by the invention can realize synergistic improvement of external quantum efficiency and color purity.

To provide an electronic device with improved performance data, particularly in terms of lifetime, efficiency, operating voltage and color purity.SOLUTION: The present application relates to an electronic device including, in this order, an anode, a hole injection layer, a hole transport layer, a light emitting layer, and a cathode. The hole transport layer contains a first compound selected from spirobifluorene amine and fluorene amine compounds, and a second compound different from the first compound and selected from spirobifluorene amine and fluorene amine compounds.SELECTED DRAWING: None

The utility model relates to a micro light-emitting device comprising a light-emitting structure having at least one light-emitting area; the color filtering structure is located on the light-emitting side of the light-emitting structure and comprises an extinction layer and at least one color filtering unit, the extinction layer is provided with at least one light-transmitting area corresponding to the at least one light-emitting area, and light emitted by the light-emitting structure in each light-emitting area is emitted out through the corresponding light-transmitting area; each color filtering unit is arranged corresponding to one light-emitting area, at least part of the color filtering unit is filled in the light-transmitting area corresponding to the corresponding light-emitting area, and each color filtering unit is configured to transmit the light of the target color and reduce the light of the non-target color in the light emitted by the light-emitting structure in the corresponding light-emitting area; and the light condensing structure is located on the side, away from the light emitting structure, of the color filtering structure and is configured to converge light emitted from the light transmitting area, so that light crosstalk between pixels can be reduced, the color purity can be improved, and the display performance of a product can be improved.

The invention discloses a boron-nitrogen compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent devices. According to the boron-nitrogen-containing organic compound provided by the invention, rigid groups are introduced, so that close packing and pi-pi interaction among molecules are effectively inhibited, the rigidity of the molecules is increased, and the vibration relaxation of the molecules is reduced. When the compound is applied to a light-emitting layer of an organic electroluminescent device, the excellent performance of high efficiency, high color purity and low-efficiency roll-off can be achieved at the same time, good thermal stability and thin film form stability are shown, the color purity of the device is improved, and the service life of the device is prolonged.

The invention relates to the technical field of organic electroluminescence, in particular to an intramolecular cyclization small organic molecule material based on carbonyl / nitrogen resonance core as well as a preparation method and application of the intramolecular cyclization small organic molecule material. The blue MR-TADF material with high color purity, high luminous efficiency and high stability is designed. The material is relatively simple to synthesize, mild in condition, high in yield and excellent in electroluminescent performance. Specifically, the multi-resonance electroluminescent material containing the nitrogen carbonyl group has a rigid planar structure, nitrogen atoms are used as electron donors, carbonyl groups are used as electron acceptors, and charge transfer paths in molecules can be limited in specific regions through a multi-resonance effect, so that mutual coupling of electrons and holes in the molecules is reduced, and the luminescence efficiency is improved. Therefore, under the condition that the emission energy is not obviously reduced, small excited state recombination energy is realized, and the color purity and the luminous efficiency of the material are favorably improved.

Image data analysis, and in particular, identifying cluster or polony locations for performing base calling within a digital image of a flow cell during DNA sequencing, is described. The method may include generating a first plurality of flow cell images of a cell sample immobilized on a support by performing one or more sequencing reaction cycles. The cell sample may include a plurality of concatemeric molecules therein. For the first plurality of flow cell images, pixel intensities and respective color purities of each of the pixel intensities may be determined. The base calling template may include base calling locations based on the pixel intensities and respective color purities of the pixel intensities. The base calling template may be for registering a second plurality of flow cell images of the support in one or more subsequent cycles of the one or more cycles.

To provide a technique of manufacturing a display device with high productivity and, to provide a high-definition display device with high color purity.SOLUTION: A high-definition display device with high color purity is provided by adjusting optical path length between a reflective electrode and a light emitting layer by transmitting central wavelength of a color filter layer without performing selective deposition of the light emitting layer. In a light emitting element, a plurality of light emitting layers emitting light of different luminous color are stacked, and as the light-emitting layer is closer to the reflective electrode, the wavelength of emitting luminous color is short. The light emitting device is manufactured without performing selective deposition of the light emitting layer, so that productivity of the light emitting device is high.SELECTED DRAWING: Figure 1

The present invention relates to an optical dual Fabry-Perot interferometer film, and more particularly, to a technology for increasing color purity using a double cavity layer. The optical dual Fabry-Perot interferometer film according to one embodiment of the present invention may include a first anti-reflection layer, a second anti-reflection layer formed on an upper portion of the first anti-reflection layer; and first and second cavity regions formed between the first anti-reflection layer and the second anti-reflection layer.

This invention aims to provide a film that achieves high color purity and vividness of red, and further, in a preferred embodiment, also provides a film with good color purity and vividness of green and blue, and excellent visual recognition. The film is defined as containing a colorant, a red colorant, and a binder. The colorant, when applied at a concentration of 50% by weight on a glass substrate with a thickness of 1 μm using a transparent acrylic resin as a binder, exhibits an average light transmittance of 30% or more at wavelengths from 660 nm to 1000 nm, and an average light transmittance of 20% or less at wavelengths from 380 nm to 660 nm. When the average light transmittance of the film at wavelengths from 400 nm to 660 nm is set as T1 (%), T1 (%) is 25% to 90%, and the film thickness is 0.2 μm to 1000 μm.

The present invention belongs to the technical field of the preparation of organic electroluminescent materials, and specifically relates to a tetradentate cyclometalated platinum (II) complex based on a 4-carbazolyl carbene structure, an electronic device and apparatus, and the use thereof. In the present invention, the steric hindrance of material molecules can be increased by introducing a 4-carbazolyl group having large steric hindrance at a carbene site, such that molecular aggregation can be avoided, and intermolecular interaction and luminescence quenching can be inhibited, which are beneficial for improving the luminescence efficiency and the color purity. The present invention has significant application prospects in the fields of OLED display and illumination.

The purpose of the present invention is to provide a display device which can effectively reduce excitation light leakage and which improves color purity without causing deterioration of a color conversion layer, and also to provide a manufacturing method for the display device. This display device comprises a plurality of display pixels each equipped with a plurality of light emitting elements disposed on a substrate, a color conversion layer disposed on the light emitting elements, and a color filter disposed on the color conversion layer, and is characterized in that the spectral transmittance of the color filter at an emission peak wavelength of the light emitting elements is 30% or less, and the spectral transmittance of the color filter at a fluorescence peak wavelength transmitted through the color conversion layer is 80% or more.

The invention relates to an optically variable security element (12) for securing security papers, value documents and other value items, comprising at least one color-changing multilayer interference layer element (22) having a reflective layer (28), at least one absorbent layer (24) and at least one dielectric spacer layer (26) between the reflective layer (28) and the at least one absorbent layer (24), due to its layered structure, the multilayer interference layer element (22) produces an intrinsic color shift effect with a first color when viewed from a first viewing direction and with a second, different color when viewed from a second viewing direction. According to the invention, a blue light absorber (32) having an absorption edge in the wavelength range of 380 nm to 460 nm is arranged above and / or below the at least one multi-layer interference layer element (22), said absorber selectively absorbing a blue light component in order to vary the intrinsic color shift effect of the at least one multi-layer interference layer element (22), the security element (12) is configured such that the security element (12) exhibits a modified color shift effect between a third color when viewed from the first viewing direction (40) and a fourth color which is different when viewed from the second viewing direction (42), the third color being different from the first color in hue and / or color purity, and the fourth color being different from the first color in hue and / or color purity. And / or the fourth color differs from the second color in hue and / or color purity.

The present invention relates to the technical field of computer vision image processing, and in particular to a method and computer device for quantitatively calculating pixel differences of color block graphics, which includes: step 1: grouping graphics; step 2: grouping graphics in layers; step 3: calculating the deviation coefficient matrix Y of the graphics; step 4: calculating the pixel matrix Z of the non-valid area; step 5: calculating the quantitative difference value relative to the benchmark image in the non-valid area; step 6: quantitative evaluation of the color of the valid area; step 7: outputting the evaluation result of the graphic difference, wherein, according to the calculation result, the larger the value of LAi is, the greater the difference between the image and the benchmark image, and the smaller the value is, the closer it is. The present application has the effect of accurately quantifying edge sharpness and internal color purity in the color block graphic generation task.

The invention provides a boron-nitrogen compound and an organic electroluminescent device using the same, and relates to the technical field of organic electroluminescence. The boron-nitrogen compound provided by the invention has high color purity and high reverse intersystem crossing rate. A rigid group is introduced to a central benzene ring, so that the molecular vibration relaxation is reduced, the FWHM is reduced, and the color purity is improved; meanwhile, derivative donors containing heteroatom phenoxazine or phenothiazine and the like are introduced, spin-orbit coupling is promoted by utilizing a heavy atom effect, so that the reverse intersystem crossing rate of excitons from a triplet state to a singlet state is increased, and the triplet state exciton extinguishing process is weakened. In addition, a large-volume peripheral substituent group is introduced to inhibit aggregation among molecules, so that a mutual quenching phenomenon among the molecules is weakened, and the luminous efficiency is improved. Therefore, when the compound is applied to the organic electroluminescent device, the color purity and luminous efficiency of the organic electroluminescent device can be improved.

The invention discloses a dielectric metasurface structural color device, which comprises a transparent dielectric substrate; the dielectric nano rectangular column hexagonal periodic array is arranged on the surface of the substrate, and the value range of lattice constants is shown in the specification; wherein the height, the length and the width of the medium nanometer rectangular column meet the relational expression, the length-width ratio is kept, and the length and the width are jointly optimized according to the central wavelength of a narrow-band reflection peak. The invention further discloses a structural color brightness regulation and control method. The invention solves the problem that the existing structural color and metasurface device cannot be used in the visible light reflection type structural color implementation process; the problems that the color purity is limited due to the reflection spectrum line width, the parameter design of different color pixels lacks a computable resonance positioning rule, and the continuous brightness modulation capability is insufficient under the condition that the hue is kept stable generally exist.

The invention relates to an organic compound, an optical film and a display device, and the organic compound has a structure as shown in a formula I. The organic compound provided by the invention can selectively absorb cyan light and can be applied to the optical film to absorb cyan stray light of a non-display wave band emitted by a display panel so as to reduce color crosstalk and improve the display quality. And the color purity and the display contrast of the display device are improved.

The objective of the present invention is to provide a display device which has reduced blue light noise and excellent color purity, by improving color filters that constitute red display pixels and green display pixels, and to provide a method for manufacturing the display device. The display device of the present invention is characterized by including display pixels in which a light emitting element, a color conversion layer, and a color filter are stacked in the stated order on a substrate, the display pixels including red display pixels, green display pixels, and blue display pixels, wherein the color filters constituting the red display pixels and the green display pixels are formed of yellow color filters. Alternatively, the colors filters constituting the red display pixels and the green display pixels are characterized by having a transmittance of 2.0% or less at a wavelength of 460 nm, and a transmittance of 85% or more at wavelengths of 550 nm and 620 nm.

The invention discloses a preparation method of a fluorescent temperature measurement material with high sensitivity, the fluorescent temperature measurement material has the following general formula: A4B2M1-xO6F: xMn < 4 + >, where A metal is one or more of elements Na, Li and K; the metal B is one or more of Mg, Zn and Ca; m metal is one or two of elements Nb and Sb; and the doping amount x of Mn < 4 + > is greater than or equal to 0.05 mol% and less than or equal to 1mol%. The material can be effectively excited by near ultraviolet or visible light, and is high in color purity, good in luminescence detectability, simple in preparation process operation, low in raw material and equipment cost, environment-friendly, stable in product chemical property and suitable for general popularization and application.

The invention provides a high-color-purity Micro-LED chip which comprises an n-type electrode, an epitaxial lamination layer and a p-type electrode, the epitaxial lamination layer comprises an n-type semiconductor layer, a multi-quantum-well light-emitting layer and a p-type semiconductor layer, the multi-quantum-well light-emitting layer is located between the n-type semiconductor layer and the p-type semiconductor layer, the side wall of the epitaxial lamination layer is coated with a first insulating layer, and the side wall of the p-type electrode is coated with a second insulating layer. The top surface of the epitaxial laminated layer is coated with a light-permeable second insulating layer, the outer side of the first insulating layer is provided with a reflecting layer, an annular shading layer is arranged above the second insulating layer, the outline of the annular shading layer is the same as that of the epitaxial laminated layer, and the middle part of the annular shading layer is a hollow light-permeable area; and the projection area of the hollow light-transmitting region in the longitudinal direction is smaller than the projection area of the bottom surface of the epitaxial laminated layer in the longitudinal direction. According to the Micro-LED chip, through the arrangement of the annular light shielding layer and other structures, the color purity and the light extraction efficiency are improved, and meanwhile the electrical performance and the light emitting performance are optimized.

The invention relates to a preparation method of single-component rare earth fluorescent powder, which comprises the following steps of: mixing yttrium chloride, europium chloride and terbium chloride serving as rare earth raw materials in proportion, preparing a ligand solution, dripping the ligand solution into a rare earth mixed solution, and coprecipitating to obtain the rare earth fluorescent powder. The preparation method is easy and convenient to operate and simple in process, the obtained fluorescent powder is uniform in ligand structure, few in impurity, high in color purity and high in luminous efficiency, meanwhile, the proportion of rare earth raw materials can be adjusted according to actual requirements, fluorescent powder with different colors is obtained, and the color gamut of the product is wide. The method is an ideal method for preparing the rare earth fluorescent powder.

The utility model discloses a centrifugal floor paint color mixing device, which comprises a bottom plate, a rotating barrel and a color mixing barrel, the rotating barrel is obliquely arranged, the lowest point of the rotating barrel is provided with a lower rotating shaft, the top of the rotating barrel is hinged with a cover plate, the edge of the cover plate is provided with a locking part, and the bottom of the cover plate is provided with a pressing plate through a spring. A second motor is arranged at the bottom of the rotating barrel, a supporting plate is arranged on an output shaft of the second motor, the color mixing barrel is located between the pressing plate and the supporting plate, and the floor paint color mixing device evenly mixes paint liquid with different colors in a centrifugal mode, so that no redundant structure exists in the color mixing space where the paint liquid is located, and cleaning is easy after color mixing is completed; and whether cleaning is thorough or not is easily checked, paint liquid for subsequent color mixing is effectively prevented from being polluted by other colors, and the color purity of the floor paint is improved.

A display device offering increased luminance at peripheral viewing angles and increased color purity without loss of luminance at a perpendicular viewing angle is provided. A bilayered color filter makes these improvements possible while eliminating the need for a polarizing plate to reduce glare. In particular, a color filter layer can correspond to the emission area of each pixel, the color filter layer including a first color filter pattern layer and a second color filter pattern layer on the first color filter pattern layer, in which one of the first and second color filter patterns includes a first color particle having a first size, and the other one of the first and second color filter patterns includes a second color particle having a second size, and wherein the second size is greater than the first size.