Abstract: A speaker diaphragm which has a high rigidity and can improve sound transmission speed for better sound quality is provided. The speaker diaphragm contains fibers of 3 to 50 mm length mixed in matrix resin. The fibers are oriented radially from center to periphery in surface layers of the diaphragm, while they are oriented in different directions in a middle layer. After setting the resin, these fibers are fixed in the matrix resin with certain tension applied thereto.

Abstract: A red fluorescence conversion medium including; a light-transmitting medium, a first perylene fluorescent dye that emits red fluorescence, and a second fluorescent dye that absorbs light in a ultraviolet to blue region to emit fluorescence, wherein the first perylene fluorescent dye absorbs light containing the fluorescence emitted by the second fluorescent dye to emit fluorescence.

Abstract: A method for the oxidative removal of carbon monoxide from a hydrogen containing gas employing a catalyst for the selective oxidation of carbon monoxide is provided.

Abstract: Provided are novel hetero-polycyclic compounds having a specific structure, color-changing material compositions comprising (A) a fluorescent coloring matter comprising at least one of the hetero-polycyclic compounds described above and (B) a binder material, color-changing films comprising the above hetero-polycyclic compounds, coloring matters comprising the above hetero-polycyclic compounds, and pigments or dyes comprising the hetero-polycyclic compounds described above, and provided are color-changing material compositions which are not deteriorated in a color-changing performance even after used for long time and which are prevented from being unusable due to deposition of coloring matters during storage and color-changing films produced by using the same, and novel hetero-polycyclic compounds, coloring matters and pigments or dyes which actualize them.

Abstract: A color conversion member composition (10) including (A) a color filter material (1), (B) a photoluminescent inorganic nanocrystal (3), (C) a medium (5), and (D) two or more solvents (5), wherein all of the solvents (D) are good solvents for one of the color filter material (A) (1) and the photoluminescent inorganic nanocrystal (B) (3), the solvents (D) include a good solvent and a poor solvent for the other of the color filter material (A) (1) and the photoluminescent inorganic nanocrystal (B) (3), and the good solvent has a vapor pressure higher than that of the poor solvent.

Abstract: A color conversion member composition (10) including (A) a color filter material (1), (B) a photoluminescent inorganic nanocrystal (3), (C) a medium (5), and (D) two or more solvents (5), wherein all of the solvents (D) are good solvents for one of the color filter material (A) (1) and the photoluminescent inorganic nanocrystal (B) (3), the solvents (D) include a good solvent and a poor solvent for the other of the color filter material (A) (1) and the photoluminescent inorganic nanocrystal (B) (3), and the good solvent has a vapor pressure higher than that of the poor solvent.

Abstract: A composition including (A) a fluorescent inorganic nanocrystal, (B) a polyfunctional cross-linkable compound, and (C) a polymerizable compound containing a group selected from a substituted or unsubstituted alkyl group having 4 to 20 carbon atoms, a substituted or unsubstituted alkylene group having 4 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, or a substituted or unsubstituted arylene group having 6 to 20 carbon atoms.

Abstract: A blue organic electroluminescent device including a first reflective member (21), a second reflective member (23) and an emitting layer (22) arranged between the first and the second reflective members (21), (23); wherein the emitting layer comprises a first organic luminescent medium emitting light with a blue first peak wavelength and a second medium emitting light with a second peak wavelength; each of lights emitted from the first and second organic luminescent mediums are interfered with between the first and second reflective members (21), (23) to enhance light emitted from the first organic luminescent medium; and light taken out to outside has a first peak wavelength and a second peak wavelength that satisfy the following relationship: I1>I2×5, I1<I2×100 wherein I1 is a luminous intensity at the first peak wavelength and I2 is a luminous intensity at the second peak wavelength.

Abstract: A color conversion substrate including a first fluorescent layer 2a emitting first fluorescence and a second fluorescent layer 2b emitting second fluorescence on a supporting substrate 1, and the first fluorescent layer 2a including an organic fluorescent material and the second fluorescent layer 2b comprising a semiconductor nanocrystal.

Abstract: A diaphragm for a speaker is made by forming acrylic foam. As the material of the acrylic foam, using maleic anhydride and methacrylic amide are contained. Thereby, the coefficient of saturated water absorption can be reduced. When the diaphragm thus manufactured is used for a speaker device, the decrease of strength due to the water absorption and the deterioration of the sound quality can be prevented even in a humid environment.

Abstract: A Vibration system part for a speaker device includes a woven fabric or a non-woven fabric made of basalt fiber produced by twist yarn or roving yarn being a continuous long-fiber. The vibration system part for the speaker device may be a diaphragm, a center cap, an edge or a damper, for example. In a preferred example, the woven fabric or the non-woven fabric is impregnated with thermosetting resin or thermoplastic resin. Additionally, a lamination member, such as paper, foam material, resin or a film, is preferably laminated (coated) on the woven fabric or the non-woven fabric. Thus, the vibration system parts for the speaker device, having excellent acoustic property and reliability, can be obtained at a low price.

Abstract: Provided are novel hetero-polycyclic compounds having a specific structure, color-changing material compositions comprising (A) a fluorescent coloring matter comprising at least one of the hetero-polycyclic compounds described above and (B) a binder material, color-changing films comprising the above hetero-polycyclic compounds, coloring matters comprising the above hetero-polycyclic compounds, and pigments or dyes comprising the hetero-polycyclic compounds described above, and provided are color-changing material compositions which are not deteriorated in a color-changing performance even after used for long time and which are prevented from being unusable due to deposition of coloring matters during storage and color-changing films produced by using the same, and novel hetero-polycyclic compounds, coloring matters and pigments or dyes which actualize them.

Abstract: A blue organic electroluminescent device including a first reflective member (21), a second reflective member (23) and an emitting layer (22) arranged between the first and the second reflective members (21), (23); wherein the emitting layer comprises a first organic luminescent medium emitting light with a blue first peak wavelength and a second medium emitting light with a second peak wavelength; each of lights emitted from the first and second organic luminescent mediums are interfered with between the first and second reflective members (21), (23) to enhance light emitted from the first organic luminescent medium; and light taken out to outside has a first peak wavelength and a second peak wavelength that satisfy the following relationship: I1>I2×5, I1<I2×100 wherein I1 is a luminous intensity at the first peak wavelength and I2 is a luminous intensity at the second peak wavelength.

Abstract: A diaphragm (400) of a speaker (100) includes a vibrating member having a substantially thin-plate shape and a base material disposed substantially at the center in a width direction of the vibrating member. The base material is formed by a woof group, a front diagonal thread group, a back diagonal thread group and a warp group, the groups being arranged so as to cross with each other and have axial directions different from each other. Accordingly, tensile strengths of the diaphragm (400) in the axial directions of the groups, i.e., tensile strengths in four directions, can be set to substantially the same. Accordingly, since the number of directions having substantially the same tensile strength is larger than conventional arrangements using triaxial fabrics, occurrence of deformation such as bending of the diaphragm (400) due to resonance can be prevented as compared to the conventional arrangements. Therefore, the speaker (100) capable of vibrating properly can be provided.

Abstract: A molten resin is injected into a cavity together with long fibers. Opposite surfaces of the resin are solidified as a fiber-resin mixture temperature drops. These surface layers become non-foam layers. A foam layer is created between the non-foam layers. A pressure reduction process is applied to cause a spring back effect when the foam layer is created. A diaphragm having these three layers can be manufactured in an inexpensive process, but physical characteristics and appearances of the diaphragm are not sacrificed.

Abstract: A fluorene-based derivative having a specific structure and an organic electroluminescence device in which an organic thin film layer comprising a single layer or plural layers including at least a light emitting layer is sandwiched between a cathode and an anode, wherein at least one layer of the organic thin film layers described above comprises the above fluorene-based derivative having a specific structure in the form of a single component or a mixed component. The organic electroluminescence device has a high luminous efficiency, and the fluorene-based derivative materializes the same.

Abstract: A damper for a speaker includes a first fiber having a tensile strength of equal to or larger than 17 cN/dtex and a second fiber having a tensile elastic modulus of equal to or smaller than 200 cN/dtex. Thereby, necessary tensile strength and elasticity can be ensured. In addition, the ratio of the first fiber to the total amount of the first and second fibers is from 10% to 90%. If the ratio of the first fiber is smaller than 10%, the necessary tensile strength and elasticity cannot be obtained. Meanwhile, if the ratio of the first fiber becomes larger than 90%, punching property at the time of damper manufacture deteriorates. Thus, it is preferred that the first fiber is included at the above ratio.

Abstract: A butterfly damper for supporting a voice coil bobbin of a speaker on a frame in a state that the damper is vibrative. The butterfly damper is made of olefinic resin material having an internal loss of 0.045 or greater, a tensile elongation of 200% or greater, and a flexural modulus of 300 MPa or greater.

Abstract: A diaphragm is manufactured by impregnating a woven cloth of e.g. aramid fiber with thermosetting resin and thereafter performing heat-molding so that the woven cloth is molded into a predetermined shape. The woven cloth has a weaving structure with a weaving pattern which partitions a succession of textures of plane-weaving by a predetermined polygonal geometrical pattern.

Abstract: A diaphragm is manufactured by impregnating a woven cloth of aramid fiber with thermosetting resin and thereafter performing heat-molding with the woven cloth sandwiched in a predetermined die at a predetermined temperature so that the woven cloth is molded into a predetermined shape. In the woven cloth, each of warps and wefts to be woven is composed of two threads woven to be arranged in parallel to provide a belt-like width.