Abstract: A speaker frame, including: a vibration support portion supporting a vibrating body of a speaker; a magnet support portion arranged inside of said vibration support portion and supporting a magnetic circuit portion of said speaker; and a plurality of connection beams connecting said vibration support portion and said magnet support portion, wherein in a cross-section passing through a central axis of said speaker, an inclination angle of one connection beam of said connection beams to said central axis is different from an inclination angle of other connection beam to said central axis.

Abstract: A high performance speaker is provided and includes a simple structure magnetic circuit achieved without the need of a complicated manufacturing process, and a high performance speaker is provided and includes a simple structure diaphragm achieved without the need of a difficult process for forming a U shape of a narrow width in the diaphragm. A speaker 100 is equipped with an inner-magnet-type magnetic circuit 4 provided with a magnet 1, a plate 2 and a yoke 3, a voice coil 7, and a diaphragm 6 supporting the voice coil 7 in place close to the end of the plate 2 while allowing the voice coil to vibrate. The yoke 3 is formed in an approximately flat plate shape having a diameter equal to or larger than that of the plate 2.

Abstract: A diaphragm, a static part vibratably supporting the diaphragm in the vibration direction, and a driving part provided at the static part and applying vibration to the diaphragm in response to an audio signal are provided, and the driving part includes a magnetic circuit forming a magnetic gap, a voice coil vibrating in a different direction from the vibration direction of said diaphragm in response to an inputted audio signal and a rigid vibration direction converter part direction-converting the vibration of the voice coil and transmitting the vibration to the diaphragm, and the vibration direction converter part is connected to an attaching counterpart including the diaphragm and the voice coil and includes a hinge part in the proximity of the attaching counterpart, and a contact avoiding part avoiding contact with the hinge part is formed on the face side of the attaching counterpart in the proximity of the hinge part.

Abstract: A vibration direction converter part for speaker device direction converting a vibration of a voice coil supporting part supporting a voice coil, and vibrating a diaphragm in the direction different from the direction of the vibration of the voice coil supporting part, has a rigid link part angle-variably and obliquely disposed between the voice coil supporting part and the diaphragm, and hinge parts formed at both end parts of the link part. The hinge part is formed with a bendable continuous member continuing between both side parts across the hinge part.

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 speaker frame, including: a vibration support portion supporting a vibrating body of a speaker; a magnet support portion arranged inside of said vibration support portion and supporting a magnetic circuit portion of said speaker; and a plurality of connection beams connecting said vibration support portion and said magnet support portion, wherein in a cross-section passing through a central axis of said speaker, an inclination angle of one connection beam of said connection beams to said central axis is different from an inclination angle of other connection beam to said central axis.

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: A fluorene-based derivative having a specific structure and an organic electro-luminescence 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 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 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 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 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 high performance speaker is provided and includes a simple structure magnetic circuit achieved without the need of a complicated manufacturing process, and a high performance speaker is provided and includes a simple structure diaphragm achieved without the need of a difficult process for forming a U shape of a narrow width in the diaphragm. A speaker 100 is equipped with an inner-magnet-type magnetic circuit 4 provided with a magnet 1, a plate 2 and a yoke 3, a voice coil 7, and a diaphragm 6 supporting the voice coil 7 in place close to the end of the plate 2 while allowing the voice coil to vibrate. The yoke 3 is formed in an approximately flat plate shape having a diameter equal to or larger than that of the plate 2.

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 method for producing semiconductor nanoparticles, wherein a reaction for forming nuclei of the semiconductor nanoparticles and a reaction for growing the nuclei of the semiconductor nanoparticles are performed in a stepwise manner. An apparatus for producing semiconductor nanoparticles includes a continuous reaction apparatus for performing a reaction for forming nuclei of semiconductor nanoparticles and a batch reaction apparatus for performing a reaction for growing the semiconductor nanoparticles.

Abstract: A color converting material composition including: a light-transmissible matrix; a fluorescent semiconductor nanocrystal which absorbs at least light in a first wavelength region; and an organic fluorescent dye which absorbs at least light in a second wavelength region.

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: 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 substrate (580) made by a thin magnesium plate having a thickness of at most 60 ?m and bent in a predetermined shape is subjected to anodic oxidation using an alkali-mixture aqueous solution containing metallic salt with a pH 12 or more so that porous anodic oxide coatings (571) are formed on the surfaces thereof. A first treated substrate (581) having the anodic oxide coatings (571) is immersed in a bath of a dye (571B), which fills the pores (571A) of the anodic oxide coatings (571) and dyes the substrate, providing a second treated substrate (582). The second treated substrate (582) is subjected to electrodeposition using electrodeposition paint made mainly of acrylic resin, forming electrodeposition coatings (572) on the anodic oxide coatings (571). A magnesium diaphragm is thereby produced, which is thin and has sufficient sensitivity and desired characteristics. The diaphragm thus dyed has metallic gloss and hence acquires a high decorative value.

Abstract: An organic ligand for a semiconductor nanocrystal including a coordinating functional group, a photopolymerizable functional group, and a functional group capable of imparting solubility in an alkaline solution. The photopolymerizable functional group is preferably an ethylenically unsaturated group, and the functional group capable of imparting solubility in an alkaline solution is preferably a carboxyl group.