139 results about "Blue green color" patented technology

An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.

An oxonitride phosphor which comprises a crystal containing at least one Group II element selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one Group IV element selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth metal as an activator R. The oxonitride phosphor is exited by an excitation light source of an ultraviolet to visible region and emits a light having a color of from a blue-green region to a yellow region.

An illuminating device able to easily visualize a pedestrian, etc. on a footway by the driver of an automobile is provided. The illuminating device has a footway side light source portion for irradiating light of spectral characteristics rich in blue-green color light to the footway, and a roadway side light source portion for irradiating light of spectral characteristics rich in green-red color light to a roadway. Further, the spectral characteristics of the light irradiated from the footway side light source portion are set such that a value I_p obtained by the following formula (1) is greater than a value I_C obtained by the following formula (1) from the spectral characteristics of the light irradiated from the roadway side light source portion.

Embodiments of the present techniques provide a related family of phosphors that may be used in lighting systems to generate blue or blue-green light. The phosphors include systems having a general formula of: ((Sr_1−zM_z)_1−(x+w)A_wCe_x)₃(Al_1−ySi_y)O_4+y+3(x−w)F_{1−y−3(x−w)} (I), wherein 0<x≦0.10, 0≦y≦0.5, 0≦z≦0.5, 0≦w≦x, A is Li, Na, K, Rb, or Ag or any combinations thereof, and M is Ca, Ba, Mg, Zn, or Sn or any combinations thereof. Advantageously, phosphors made accordingly to these formulations maintain emission intensity across a wide range of temperatures. The phosphors may be used in lighting systems, such as LEDs and fluorescent tubes, among others, to produce blue and blue/green light. Further, the phosphors may be used in blends with other phosphors, or in combined lighting systems, to produce white light suitable for illumination.

A high-brightness phosphor screen and a method for forming the same are provided. The high-brightness phosphor screen having a low or middle working voltage, unlike a method of improving luminescent properties by use of a new synthetic phosphor, can be formed by simple deposition of a phosphor mixture that contains a proper ratio of a blue or green light-emitting phosphor for color image display and a bluish green light-emitting ZnO:Zn phosphor with high luminescent efficiency at low voltages.

An organic electroluminescent apparatus essentially includes an organic electroluminescent device, a color filter layer and a substrate. The color filter layer is made of four layers, a red color filter layer, a green color filter layer, a blue color filter layer, and a blue-green color filter layer. The color filter layer is formed between the organic EL device and the substrate. The blue-green color filter layer converts white light emitted from a light emitting layer at a color temperature in the range from 3000 K to 4500 K into white light having high purity at a color temperature of 6500 K.

The invention discloses a piece of anti-myopia paper. The anti-myopia paper is characterized by being capable of reflecting colored light with the reflection wavelength of 460-510nm and displaying blue-green color with the luminance of 54%-58%. The paper can be not only prepared by adding a dye into paper pulp but also prepared by printing color on a piece of white paper. The reflection wavelength of the blue-green paper is within a spectral range of 460-510nm, and the color of the paper is darker than white and yellow, so that the colored light reflection is reduced, more colored light can be absorbed, the propor color is strong, the reflection is low and a role of preventing the eyes of students with weak hard light reflecting capabilities from myopia can be played, and the vision of the students is benefited; and the paper is easy to popularize and implement, and the social and economic benefits are obvious.

A white light apparatus with adjustable color temperature and a method of producing a white light thereof are disclosed. The white light apparatus includes a blue light-emitting diode, a phosphor powder and an orange light-emitting diode or a blue-green light-emitting diode. Furthermore, the method includes the following steps. Firstly, the blue light-emitting diode is provided for emitting a blue light. Secondly, the phosphor powder is prepared for emitting a phosphor light mixed with the blue light to produce the white light. Finally, the orange light-emitting diode or the blue-green light-emitting diode is controlled by a driving current, thereby to adjust the color temperature of the white light of the white light apparatus.

A processing method of image coding/decoding based on pixel statistic character and vision character includes counting out pixel number of each color for each image, utilizing similar color with pixel number being greater than pixel threshold in image to replace color with pixel number being less than pixel threshold, using algorithm of present invention to calculate color diversity ratio between each color in image according different sensitivity of human eye on red-blue-green colors and combining two colors with color diversity ratio being less than set threshold of color diversity ratio to be color with more pixel number.

The invention relates to a testing agent for detecting ammonia nitrogen in water. The testing agent comprises A, B two packages, wherein the A is packaged by grinding and mixing sodium tartrate, natrium salicylicum, citric acid trisodium and nipride; the B is packaged by grinding and mixing sodium-hydroxide, lithium hydrate, citric acid trisodium, babysafe, symclosene and symclosene. When use the testing agent, adding a pack of A into sample water, adding a pack of B after placing 2 minutes, the water will display blue-green color if there's ammonia nitrogen in the water, and the darkness of the color is in proportion to the concentration of the ammonia nitrogen; placing 10 minutes, comparing it with the standard color matching card, color matching disc to read the concentration of the ammonia nitrogen in the water.

The invention provides a colored curable resin composition, comprising a colorant, a resin, a polymerized compound and a polymerization initiator, wherein the colorant includes copper chloride phthalocyanine dye and a yellow dye; the content of the yellow dye is more than 1 mass % and below 65 % relative to a total content of the colorant. According to the invention, the invention provides a colored curable resin composition which can manufacture blue-green color filters.

The invention belongs to the technical field of sesame oil quality monitoring, in particular to a method for rapidly detecting adulteration of sesame oil. Add an organic solvent to the oil sample to be tested, then add a color developer and a color aid; shake the reaction for 5-60s and then let it stand for 60-900s; judge whether the sesame oil is mixed with other oils according to the color development of the solution, pure sesame oil color development Later blue-green. The method for rapidly detecting sesame oil adulteration of the invention is simple and convenient to operate, low in cost, accurate in identification and good in repeatability.

The invention relates to a Yb3+-doped vanadate up-conversion fluorescent material and a preparation method of the material, belonging to the field of luminous materials and preparation technology of the luminous materials. The chemical composition of the Yb3+-doped vanadate up-conversion fluorescent material is expressed by the general formula: Ca9Ln(1-x)Ybx(VO4)7, wherein x is the molar percentage of Yb3+ doping amount, x is greater than 0.0001 and is less than or equal to 1.0, and Ln is at least one of La3+, Gd3+, Lu3+ and Y3+; and the preparation method is a high-temperature solid-phase method or chemical solution method. The fluorescent material can realize up-conversion luminescence of a blue green color under the excitation of 980nm infrared laser, and can be applied to the detection of infrared light and also can be used for the fields of goods anti-counterfeiting, biological mark and the like.

The present invention describes an apparatus and method for manufacturing a white light-emitting diode (LED) using a powder with characteristics of fluorescence to achieve a high-luminosity white LED. The LED emitting ultraviolet light is used as an excitation source, which excites a first powder with blue-green light, and a second powder with orange light. After that, a white light is produced by blending blue-green and orange light with the principle of complementary colors. For achieving the high-luminosity white LED, the invention adopts a suitable LED to be the excitation source with a suitable blending proportion. On the other hand, the implementation of the fluorescent powder with blue-green light can be modulated using a metal ion in the host lattice to change the ligard field of the crystal.

The invention provides a combined bleaching agent for timber. The combined bleaching agent comprises the following main components in weight ratio per 1000 ml of solution : 15-75 g of sodium percarbonate; 5-30 g of sodium perborate; 2-8 g of sodium thiosulfate and 12-50 g of sodium sulfate. The combined bleaching agent provided by the invention has higher use security and good bleaching performance; with the adoption of the bleaching agent, dark spots, mineral lines, blue stain and the like on the timber surface and the phenomena that the timber color is uneven caused by various pollutions can be eliminated, and the color difference of heartwood can be eliminated; the overall timber color can be diluted, so that the timber surface can become white and bright and uniform in color and luster; and moreover, the original timber texture and quality can be maintained, particularly the blue-green heartwood of North American liriodendron wood can be repaired better; the bleached timber is in light yellow color, which is very attractive. The processing method further can be used for reducing the white degree reducing trend caused by phototropy, so that the light resistance performance of the timber surface can become more ideal.

The invention relates to an application method of a ratio-type cyanide ion fluorescent probe molecule. The invention belongs to the technical field of anion detection. The method is characterized in that the method is an application of a ratio fluorescent probe molecule, which is 1,2,2,3-tetramethyl-4,5-benzoindoline, used in cyanide ion detection. The probe molecule is obtained by a one-step process of periodic methane alkylation of 2,3,3-trimethyl-4,5-benzindole. In a system where DMF:H2O=1:1 (V/V), the probe molecule is excited by using 320nm light, and emission occurs at 461nm. When cyanide ion is added, intra-molecular charge transfer (ICT) process is broken, emission peak at 461nm is reduced, and new emission peak occurs at 425nm. Therefore, solution fluorescence is turned from bluish green to deep blue. In a system wherein cyanide ion coexists with other anions, the probe molecule shows high interference resistance, high specificity, and high sensitivity.

A phosphor composition for a low-pressure discharge lamp with a high light yield and a high color temperature contains phosphors which emit in the red wavelength region, including yttrium oxide doped with europium or gadolinium-zinc-magnesium pentaborate doped with cerium and manganese, phosphors which emit in the green wavelength region including lanthanum phosphate doped with cerium and terbium and/or cerium-magnesium aluminate doped with terbium and/or cerium-magnesium pentaborate doped with terbium, and optionally a phosphor which emits in the blue wavelength region of the barium-magnesium aluminate doped with europium type. The phosphor composition additionally contains at least one phosphor which emits in the blue or blue-green wavelength region selected from the group consisting of manganese-strontium-barium-magnesium aluminate doped with manganese and europium or barium-magnesium aluminate doped with europium and manganese and strontium aluminate doped with europium and strontium-barium-calcium chloroapatite doped with europium and strontium borophosphate doped with europium.

Glasses are described which have characteristics that produce high visible transmittance, low solar transmittance, and high selectivity. The glasses can also preferably have a blue-green color. A number of advantageous formulations are described.