Abstract: An auxiliary power circuit of a conversion module is used to supply power to a control unit, and an input end of the conversion module includes an even number of energy storage units coupled in series. The auxiliary power circuit includes an even number of primary-side circuits and a secondary-side circuit. Each primary-side circuit includes a first switch unit, a second switch unit, and a resonance tank. The first switch unit is connected to the second switch unit in series, and is correspondingly connected to one of the energy storage units in parallel. The resonance tank is connected to the second switch unit in parallel. The secondary-side circuit is coupled to the resonance tanks of two of the primary-side circuits to acquire power and supply power to the control unit.

Abstract: An auxiliary power circuit of a conversion module is used to supply power to a control unit, and an input end of the conversion module includes an even number of energy storage units coupled in series. The auxiliary power circuit includes an even number of primary-side circuits and a secondary-side circuit. Each primary-side circuit includes a first switch unit, a second switch unit, and a resonance tank. The first switch unit is connected to the second switch unit in series, and is correspondingly connected to one of the energy storage units in parallel. The resonance tank is connected to the second switch unit in parallel. The secondary-side circuit is coupled to the resonance tanks of two of the primary-side circuits to acquire power and supply power to the control unit.

Abstract: An optical imaging lens includes five lens elements arranged from an object side to an image side in a given order along an optical axis of the optical imaging lens. The object-side surface of the second lens element has a convex portion in a vicinity of its periphery, the object-side surface of the third lens element has a convex portion in a vicinity of the optical axis, the object-side surface of the fourth lens element has a concave portion in a vicinity of its periphery, the optical imaging lens as a whole has only the five lens elements, and an effective system focal length is EFL, an air gap between the second lens element and the third lens element along the optical axis is G23, a central thickness of the third lens element along the optical axis is T3, and EFL, G23 and T3 satisfy the equation 4.89?EFL/(G23+T3)?5.88.

Abstract: A keycap includes a lower plate, a first magnetic element, an upper cover and a second magnetic element. The lower plate has two first engaging portions, which are respectively disposed on two opposite sides of an upper surface of the lower plate. The first magnetic element is fixed on the lower plate. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has two second engaging portions respectively disposed on two opposite sides of an inner top surface of the upper cover and respectively corresponding to the two first engaging portions. The second magnetic element is fixed on the inner top surface of the upper cover, and is configured to magnetically attract the first magnetic element.

Abstract: The present invention provides a keycap, which includes a lower plate and an upper cover. The lower plate has two openings respectively through two opposite sides of the lower plate to respectively define two elastic arms. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has two abutting portions and a protrusion, and the two abutting portions are respectively disposed on two opposite inner sides of the upper cover and respectively correspond to the two elastic arms, and each of the two abutting portions is configured to abut against a portion of the corresponding elastic arm, and the protrusion is disposed on an inner top surface of the upper cover and corresponds to one of the two openings.

Abstract: A biodegradable polyester is provided. The biodegradable polyester is a transesterification or esterification reaction product of a reactant (a) and a reactant (b). The reactant (a) is a modified linear saccharide oligomer. The reactant (b) is a polyester, or the reactant (b) includes a dicarboxylic acid and a diol. The modified saccharide oligomer is a reaction product of a saccharide oligomer and a modifier.

Abstract: A foam and a foaming composition are provided. The foam includes a composite material and a plurality of foam cells, wherein the foam cells are disposed in the composite material. The composite material includes a modified sulfur-containing polymer and a fluorine-containing polymer fiber, wherein a degree of orientation as defined by the ratio I110/I200 is from 1.0 to 1.3, wherein I110 is the X-ray diffraction peak intensity of (110) planes of the modified sulfur-containing polymer and I200 is the X-ray diffraction peak intensity of (200) planes of the modified sulfur-containing polymer.

Abstract: A composite material and a foam prepared from the composite material are provided. The composite material includes a network polymer, a fluorine-containing polymer fiber, and a reinforcement fiber. The polymer network is a crosslinking reaction product of a polymer and an oligomer, wherein the polymer is polyamide, polyester, polyurethane, or a combination thereof, and the oligomer is a vinyl aromatic-co-acrylate oligomer with an epoxy functional group. The oligomer has a weight percentage of 1% to 10%, based on the weight of the network polymer. The ratio of the weight of the reinforcement fiber to the total weight of the network polymer and the fluorine-containing polymer fiber is from 1:9 to 4:6.

Abstract: A biodegradable polyester and a method for preparing a biodegradable polyester are provided. The biodegradable polyester is a product of a reactant (A) and a reactant (B) via polycondensation. The reactant (A) is a product of a reactant (C) and a reactant (D) via an esterification reaction. The reactant (B) is at least one epoxy resin with a secondary hydroxyl functional group. The reactant (C) is at least one diol, and the reactant (D) is at least one dicarboxylic acid, at least one acid anhydride, or a combination thereof.

Abstract: A bio-resin composition, a bio-resin composite, and a bio-foam material are provided. The bio-resin composition includes a polymer matrix, a toughener, and an antistatic agent. The weight ratio of the polymer matrix to the toughener is between 90:10 and 60:40. Based on the total weight of the polymer matrix and the toughener, the content of the antistatic agent is between 1% and 10%.

Abstract: A biodegradable material and a method for preparing a biodegradable material are provided. The biodegradable material includes a continuous phase and a dispersed phase. The continuous phase includes a polyester, and the dispersed phase includes a modified saccharide oligomer. In particular, the weight ratio of the modified saccharide oligomer to the polyester is from 3:97 to 30:70. The dispersed phase has a maximum diameter of 100 nm to 900 nm.

Abstract: A UV LED package includes a substrate having a dam, a LED die on the substrate, a lens bonded to the substrate, an extraction layer covering a light emitting surface of the LED die, and a lens sealing layer between the lens and the dam. The extraction layer can be formed to provide a precise gap G between the lens and the light emitting diode (LED). In addition, the materials for the lens and the extraction layer can be selected, and the gap G can be precisely dimensioned, to reduce refraction and reflection, to improve radiation extraction, to reduce power radiance, and to improve the efficiency of the UV LED package.

Abstract: A method of forming a film is provided, which includes providing a sheet from a polyamide composition; and biaxial stretching of the sheet to form a film, wherein the polyamide composition includes a blend of a first polyamide and a second polyamide. The first polyamide has a repeating unit of and the second polyamide has repeating units of The second polyamide is a crystalline random copolymer. The sheet of the polyamide composition is biaxially stretched at a rate of 20 mm/sec to 100 mm/sec.

Abstract: A composite material and a foam prepared from the composite material are provided. The composite material includes a network polymer, a fluorine-containing polymer fiber, and a reinforcement fiber. The polymer network is a crosslinking reaction product of a polymer and an oligomer, wherein the polymer is polyamide, polyester, polyurethane, or a combination thereof, and the oligomer is a vinyl aromatic-co-acrylate oligomer with an epoxy functional group. The oligomer has a weight percentage of 1% to 10%, based on the weight of the network polymer. The ratio of the weight of the reinforcement fiber to the total weight of the network polymer and the fluorine-containing polymer fiber is from 1:9 to 4:6.

Abstract: A biodegradable polyester is provided. The biodegradable polyester is a transesterification or esterification reaction product of a reactant (a) and a reactant (b). The reactant (a) is a modified linear saccharide oligomer. The reactant (b) is a polyester, or the reactant (b) includes a dicarboxylic acid and a diol. The modified saccharide oligomer is a reaction product of a saccharide oligomer and a modifier.

Abstract: A UV LED package includes a substrate having a dam, a LED die on the substrate, a lens bonded to the substrate, an extraction layer covering a light emitting surface of the LED die, and a lens sealing layer between the lens and the dam. The extraction layer can be formed to provide a precise gap G between the lens and the light emitting diode (LED). In addition, the materials for the lens and the extraction layer can be selected, and the gap G can be precisely dimensioned, to reduce refraction and reflection, to improve radiation extraction, to reduce power radiance, and to improve the efficiency of the UV LED package.

Abstract: An elastomer is provided, which is a product of reacting C4-12 lactam, poly(C2-4 alkylene glycol), C4-12 diacid, and multi-ester aliphatic monomer. The C4-12 lactam and the poly(C2-4 alkylene glycol) have a weight ratio of 20:80 to 80:20. The total weight of the C4-12 lactam and the poly(C2-4 alkylene glycol) and the weight of the C4-12 diacid have a ratio of 100:0.5 to 100:10. The total weight of the C4-12 lactam and the poly(C2-4 alkylene glycol) and the weight of the multi-ester aliphatic monomer have a ratio of 100:0.01 to 100:5.

Abstract: A thermoplastic vulcanizate is provided, including 10-50 parts by weight of a nylon plastic and 50-90 parts by weight of a cross-linked acrylic rubber polymer. The cross-linked acrylic rubber polymer is dispersed in the Nylon plastic. The cross-linked acrylic rubber polymer is formed by a modified acrylic rubber polymer having a hydrolysable silane group through crosslinking in the presence of water. In the modified acrylic rubber polymer having a hydrolysable silane group, a linkage group represented by formula (I) or formula (II) is between a backbone and the hydrolysable silane group: wherein R1 is H or —OH; R2 is H, —Z?—Si(OR?)3 or C1-C10 hydrocarbon group; R3 is H or C1-C10 hydrocarbon group; Z? is a divalent bridging group; R? is individually C1-C10 hydrocarbon group. A manufacturing method of the thermoplastic vulcanizate is also provided.

Abstract: A polyester elastomer is provided, which includes a product of reacting (a) amide oligomer, (b) polyalkylene glycol, and (c) poly(alkylene arylate). (a) Amide oligomer has a chemical structure of or a combination thereof, wherein R1 is C4-8 alkylene group, R2 is C4-8 alkylene group, and each of x is independently an integer of 10 to 20. (b) Polyalkylene glycol has a chemical structure of wherein R3 is C2-10 alkylene group, and y is an integer of 20 to 30. (c) Poly(alkylene arylate) has a chemical structure of or a combination thereof, wherein Ar is R4 is C2-6 alkylene group, and z is an integer of 1 to 10.

Abstract: A thermoplastic vulcanizate is provided, including 10-50 parts by weight of a nylon plastic and 50-90 parts by weight of a cross-linked acrylic rubber polymer. The cross-linked acrylic rubber polymer is dispersed in the Nylon plastic. The cross-linked acrylic rubber polymer is formed by a modified acrylic rubber polymer having a hydrolysable silane group through crosslinking in the presence of water. In the modified acrylic rubber polymer having a hydrolysable silane group, a linkage group represented by formula (I) or formula (II) is between a backbone and the hydrolysable silane group: wherein R1 is H or —OH; R2 is H, —Z?—Si(OR?)3 or C1-C10 hydrocarbon group; R3 is H or C1-C10 hydrocarbon group; Z? is a divalent bridging group; R? is individually C1-C10 hydrocarbon group. A manufacturing method of the thermoplastic vulcanizate is also provided.