Abstract: A charge control circuit includes: a charge/discharge circuit to charge a capacitor when an input current from an input power supply is smaller than a first current, and discharge the capacitor when the input current is greater than the first current; a discharge circuit to discharge the capacitor when the input current becomes greater than a second current greater than the first current; an error amplifier circuit to amplify an error between a lower voltage between a capacitor charging voltage and a reference voltage corresponding to the maximum output voltage, and a feedback voltage corresponding to the output voltage; and a drive circuit to perform switching of a transistor of a booster circuit, including an inductor and the transistor to increase an inductor current, configured to boost the output voltage by supplying the inductor current to the terminal when the transistor is off, so that the error becomes smaller.

Abstract: A charge control circuit includes a comparator circuit to compare a secondary-battery voltage with a comparison voltage corresponding to an input-power-supply voltage, a transistor to supply an input current to an inductor, a first control circuit to control the transistor, and a second control circuit to control second and third transistors to increase and decrease an inductor current, respectively, so that a boost DC-DC converter performs a boost operation. When the secondary-battery voltage is equal to or higher than the comparison voltage, the first and second control circuits turn on the transistor and perform switching of the second and third transistors complementarily, respectively. When the secondary-battery voltage is lower than the comparison voltage, the first control circuit controls the transistor so that the input current takes a predetermined value, and the second control circuit turns on and off the third and second transistors, respectively.

Abstract: An optical-sheet manufacturing device 1 is provided with a first belt-shaped mold S1, a second belt-shaped mold S2, first and second supply units that supplies resins to the belt-shaped molds S1 and S2, respectively, and first and second embossing units that embosses the supplied resins on the first and second belt-shaped molds S1 and S2 to form first and second embossed sheets A? and B?. The optical-sheet manufacturing device is characterized in that the first embossed sheet A? embossed on the first belt-shaped mold S1 and the second embossed sheet B? embossed on the second belt-shaped mold S2 are shifted by the rotation of the first belt-shaped mold S1 and the second belt-shaped mold S2 and the first embossed sheet A? and the second embossed sheet B? are sandwiched between the first belt-shaped mold S1 and the second belt-shaped mold S2 and are laminated.

Abstract: A charge control circuit includes a comparator circuit to compare a secondary-battery voltage with a comparison voltage corresponding to an input-power-supply voltage, a transistor to supply an input current to an inductor, a first control circuit to control the transistor, and a second control circuit to control second and third transistors to increase and decrease an inductor current, respectively, so that a boost DC-DC converter performs a boost operation. When the secondary-battery voltage is equal to or higher than the comparison voltage, the first and second control circuits turn on the transistor and perform switching of the second and third transistors complementarily, respectively. When the secondary-battery voltage is lower than the comparison voltage, the first control circuit controls the transistor so that the input current takes a predetermined value, and the second control circuit turns on and off the third and second transistors, respectively.

Abstract: A charge control circuit includes: a charge/discharge circuit to charge a capacitor when an input current from an input power supply is smaller than a first current, and discharge the capacitor when the input current is greater than the first current; a discharge circuit to discharge the capacitor when the input current becomes greater than a second current greater than the first current; an error amplifier circuit to amplify an error between a lower voltage between a capacitor charging voltage and a reference voltage corresponding to the maximum output voltage, and a feedback voltage corresponding to the output voltage; and a drive circuit to perform switching of a transistor of a booster circuit, including an inductor and the transistor to increase an inductor current, configured to boost the output voltage by supplying the inductor current to the terminal when the transistor is off, so that the error becomes smaller.

Abstract: A retroreflective article having excellent retroreflective efficiency, entrance angle characteristic, observation angle characteristic, and rotation angle characteristic is provided.

Abstract: A hexagonal cube corner retroreflective article has a set of a large number of hexagonal cube corner retroreflective elements. In the retroreflective element, at least one reflective lateral face (face a, face b, and/or, face c) is divided into a pair of an upper secondary reflective lateral face (face a1, face b1, and/or face c1) and a lower secondary reflective lateral face (face a2, face b2, and/or face c2) partitioned by a line segment (EF, FD, and/or DE) connected by apexes (E, F, and/or D) constituting that reflective lateral face, in which two secondary reflective lateral faces constituting the pair of the secondary reflective lateral faces are not on the same plane. By these features the retroreflective article provides excellent observational angle characteristics.

Abstract: The present invention relates to a triangular pyramidal cube corner retroreflective article and a producing method thereof. In the triangular pyramidal cube corner retroreflective article, a triangular pyramidal cube corner retroreflective element pair group is disposed in a closest-packed fashion on a common plane defined by three base lines, and the each of retroreflective elements in a pair having one base line (A-B) shared by the retroreflective elements in the pair. The triangular pyramidal cube corner retroreflective article includes a first element pair group, in which two interior angles (?=?BAC and ?=?ABC) formed by the shared base line of the element pair and two other base lines are different from each other and the element pair is line-symmetrically disposed in relation to the shared base line (A-B); and a second element pair group, in which the element pair is congruent to a line-symmetrical shape to the first element pair in relation to a line segment connecting vertexes of the base planes.

Abstract: A cube-corner retroreflective article is provided with a number of cube-corner retroreflective element pairs each formed by a pair of cube-corner retroreflective elements sharing one side. Each of the cube-corner retroreflective elements has reflective lateral surfaces including two trapezoidal reflective lateral surfaces and one pentagonal or isosceles-triangular reflective lateral surface, and a projection shape of a quadrangle when projected onto a common plane, wherein ratios (rHA/rHC and rHB/rHC) between a length (rHC) of a ridge (HC) shared by the trapezoidal reflective lateral surfaces (HAFC and HBGC) and lengths (rHA and rHB) of other ridges (HA and HB) are in a range of 0.5 to 1.5.

Abstract: There is provided a hexagonal cube corner retroreflective article with excellent observation angle characteristics. The hexagonal cube corner retroreflective article has a set of a large number of hexagonal cube corner retroreflective elements. In the hexagonal cube corner retroreflective element, at least one reflective lateral face (face a, face b, and/or, face c) is divided into a pair of an upper secondary reflective lateral face (face a1, face b1, and/or face c1) and a lower secondary reflective lateral face (face a2, face b2, and/or face c2) partitioned by a line segment (EF, FD, and/or DE) connected by apexes (E, F, and/or D) constituting that reflective lateral face, in which two secondary reflective lateral faces constituting the pair of the secondary reflective lateral faces are not on the same plane.

Abstract: An optical layer for a light control type solar photovoltaic module, a light control type solar photovoltaic module, and a light control type solar photovoltaic panel have an excellent directionality to the sunlight are provided. An optical layer 4 for a light control type solar photovoltaic module includes an entrance surface 11 and an exit surface 12 and is arranged opposite photovoltaic cells 6 that convert light into electric energy.

Abstract: An optical layer for a light control type solar photovoltaic module, a light control type solar photovoltaic module, and a light control type solar photovoltaic panel having an excellent directionality to the sunlight are provided. An optical layer 4 for a light control type solar photovoltaic module includes an entrance surface 11 and an exit surface 12 and is arranged opposite photovoltaic cells 6 that convert light into electric energy. A number of prismatic optical elements are formed in at least one of the entrance surface 11 and the exit surface 12, each of the prismatic optical elements is on a common plane S1 defined by a common base shared by the prismatic optical elements adjacent to each other, and a prism axis 7 of each of the prismatic optical elements is inclined toward a predetermined direction with respect to a direction perpendicular to the common plane.

Abstract: A retroreflective article having excellent retroreflective efficiency, entrance angle characteristic, observation angle characteristic, and rotation angle characteristic is provided. In a retroreflective article including a number of cube corner retroreflective elements formed in a closely packed manner on a common plane (plane Sc), each of the cube corner retroreflective elements having three reflective lateral surfaces (surface a, surface b and surface c) that have three edge lines (HD, HE and HF) and one apex.

Abstract: [Object] An object to be solved by the invention is to improve a retroreflective characteristic of a quadrilateral element that is a cube-corner element, which has reflective lateral surfaces including two trapezoidal reflective lateral surfaces and one pentagonal or isosceles-triangular reflective lateral surface, and which has a projection shape of a quadrangle when projected onto a common plane and is particularly to provide a cube-corner retroreflective article provided with a quadrilateral element excellent in an entrance angle characteristic and a rotation angle characteristic.

Abstract: The present invention relates to a triangular pyramidal cube corner retroreflective article and a producing method thereof. In the triangular pyramidal cube corner retroreflective article, a triangular pyramidal cube corner retroreflective element pair group is disposed in a closest-packed fashion on a common plane defined by three base lines, and the each of retroreflective elements in a pair having one base line (A-B) shared by the retroreflective elements in the pair. The triangular pyramidal cube corner retroreflective article includes a first element pair group, in which two interior angles (?=?BAC and ?=?ABC) formed by the shared base line of the element pair and two other base lines are different from each other and the element pair is line-symmetrically disposed in relation to the shared base line (A-B); and a second element pair group, in which the element pair is congruent to a line-symmetrical shape to the first element pair in relation to a line segment connecting vertexes of the base planes.

Abstract: This invention offers an AGC circuit that prevents disturbance in an output waveform when an input signal varies abruptly. A first terminal of a capacitor is connected with an output terminal of a variable gain amplifier and a second terminal of the capacitor is connected with a non-inverting input terminal (+) of a differential amplifier. A reference voltage Vref2 is applied to an inverting input terminal (?) of the differential amplifier. A bias voltage Vbias from a bias circuit is applied to the non-inverting input terminal (+) of the differential amplifier, while the reference voltage Vref2 from the bias circuit is applied to the inverting input terminal (?) of the differential amplifier. An output signal of the differential amplifier is applied to the variable gain amplifier through a direct current amplifier as a direct current control voltage.