Abstract: The present invention aims to provide a muffling structure of a vent pipe and a muffling structure of a case, which is capable of muffling in a wide frequency range and preventing vent resistance in the air pipe or the case from deterioration. Vent holes (11a) are formed in the peripheral wall of the vent pipe (11), a cover (12) is so provided on the peripheral wall of the vent pipe (11) as to cover the vent holes (!1a), and a bag-like body (13) in which activated charcoal (14) is contained is disposed in the space formed by the peripheral wall of the vent pipe (11) and the inner wall of the cover (12).

Abstract: A modulation method according to the invention is applied to a modulation device in which a light source is driven by a differential signal while a modulation circuit and the light source are capacitively coupled. In the modulation method of the invention, when an average potential fluctuates at an input terminal of the light source, a potential fluctuation is externally provided using a control circuit such that a normal phase side and a reverse phase side become equal to each other in a time constant of the fluctuation in average potential, and transient states of the average potentials at the normal phase side and reverse phase side are equalized and cancel each other as in-phase components of a signal input to the light source, which allows an optical signal to be normally transmitted from the light source.

Abstract: A back light includes an irradiating portion for applying light to a liquid crystal panel and a heat diffusing member which is in contact with the irradiating portion. The heat diffusing member is made of a thermal conductive sheet containing a plate-like boron nitride particle and the thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet is 4 W/m·K or more.

Abstract: A thermal conductive sheet contains a plate-like boron nitride particle. The proportion of the boron nitride particle content is 35 vol % or more, and the thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet is 4 W/m·K or more.

Abstract: A thermal conductive sheet contains a plate-like boron nitride particle, wherein the thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet is 4 W/m·K or more. The breakdown voltage of the thermal conductive sheet as measured in conformity with JIS C 2110 (2010) is 10 kV/mm or more.

Abstract: A light-emitting diode device includes a light-emitting diode, a power circuit portion for supplying electric power to the light-emitting diode, and a heat dissipating member for dissipating the heat generated from the light-emitting diode. The heat dissipating member is made of a thermal conductive sheet which contains a plate-like boron nitride particle. The thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet is 4 W/m·K or more.

Abstract: A thermal conductive sheet contains a plate-like boron nitride particle, has a thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet of 4 W/m·K or more, and has a volume resistivity of 1×1010 ?·cm or more. The transmittance of light at a wavelength of 500 nm is 10% or less. The surface reflectance R of light at 500 nm is 70% or more relative to the surface reflectance of barium sulfate as 100%. A light-emitting diode mounting substrate includes a substrate for mounting a light-emitting diode; and a thermal conductive light reflection layer being formed on the surface of the substrate and including the above-described thermal conductive sheet. A thermal conductive adhesive sheet includes a thermal conductive layer including the above-described thermal conductive sheet, and an adhesive layer or a pressure-sensitive adhesive layer laminated on at least one side of the thermal conductive layer.

Abstract: A thermal conductive sheet contains a plate-like boron nitride particle. The thermal conductive sheet has a thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet of 4 W/m·K or more. The thermal conductive sheet does not fall off from an adherend in the initial adhesion test (1) below: Initial adhesion test (1): The thermal conductive sheet is temporarily fixed on an adherend along the horizontal direction, and thereafter the adherend is turned over to be upside down. The maximum cutting resistance on the cutting blade at the time of cutting the thermal conductive sheet is 120 N/30 mm or less.

Abstract: A thermal conductive sheet containing a plate-like boron nitride particle, wherein the thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet is 4 W/m·K or more, and a glass transition point determined as the peak value of tan? obtained by measuring a dynamic viscoelasticity of the thermal conductive sheet at a frequency of 10 Hz is 125° C. or more.

Abstract: A thermal conductive sheet includes a plate-like boron nitride particle. The thermal conductive sheet has a thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet of 4 W/m·K or more, and the 5% weight loss temperature of 250° C. or more. The thermal conductive sheet has a water absorption of 3 vol % or less.

Abstract: A heat dissipation structure includes a substrate, an electronic component mounted on the substrate, a heat dissipation member for dissipating heat generated from the electronic component, and a thermal conductive adhesive sheet provided on the substrate so as to cover the electronic component. The thermal conductive adhesive sheet includes a thermal conductive layer containing a plate-like boron nitride particle. The thermal conductive layer has a thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive layer of 4 W/m·K or more, and the thermal conductive adhesive sheet is in contact with the heat dissipation member.

Abstract: A power module includes a power module board including an insulating layer and a conductive circuit formed on the insulating layer, a power device provided on the power module board and electrically connected to the conductive circuit, and a thermal conductive sheet for dissipating the heat generated from the power module board and/or the power device. The thermal conductive sheet contains a plate-like boron nitride particle and the thermal conductivity in a direction perpendicular to the thickness direction of the thermal conductive sheet is 4 W/m·K or more.

Abstract: An imaging device module includes an imaging device including a light incident plane on which light is incident, and a reverse face disposed on an opposite side of the light incident plane; and a thermal conductive sheet provided on the reverse face for dissipating heat generated from the imaging device. The thermal conductive sheet contains a plate-like boron nitride particle, and the thermal conductive sheet has a thermal conductivity in a direction perpendicular to the thickness direction of 4 W/m·K or more.

Abstract: In the present invention, unlike a conventional circuit, discrimination is not made by integrating a logical code that includes “0” and “1” to some extent and produced from a random code, but repetition of an identical pattern of a well-known preamble signal added to a head portion of a signal is discriminated when a bit-rate of the signal is changed. More specifically, the repetition of the identical pattern is converted into a consecutive identical signal to generate the consecutive identical signal (having a length of tens bits to thousands bits). Although the consecutive identical signal is longer than a same-code continuation length included in the signal, and is shorter than a time constant necessary to the conventional circuit by about one to three digits. Therefore, an integration time can be shortened to the same degree as the generated consecutive identical signal length, and the bit-rate can be discriminated at high speed within a preamble signal receiving time.

Abstract: A polarization component, capable of efficiently reflecting an obliquely transmitted light beam toward a light source without degrading the transmission-polarization property of a perpendicular incident light beam, is provided. A C-plate having an oblique retardation of at least ?/8 with respect to a light beam inclined by at least 30° is disposed between at least two reflective circular polarizer layers whose selective reflection wavelength bands of polarized light overlapping each other. A combination of a reflective linear polarizer and a quarter wavelength plate may be used instead of the reflective circular polarizer. Alternatively, a combination of two reflective linear polarizer layers and two quarter wavelength plate layers (Nz?2) disposed therebetween can provide a similar effect. Further, a combination of two reflective linear polarizer layers and a half wavelength plate (Nz?1.5) disposed therebetween may be used.

Abstract: A light source comprising sidelight type backlight light guide plate (L), wherein a transmittance angle dependent layer (T1) which transmits normally incident light and reflects obliquely incident light is disposed on one surface of the sidelight type backlight light guide plate (L), and a reflection plate (R) having a repetitive slope structure is disposed on the other surface of the sidelight type backlight light guide plate (L). The invention light source is less in absorption loss due to repetition of light reflection and the like.

Abstract: A modulation method according to the invention is applied to a modulation device in which a light source is driven by a differential signal while a modulation circuit and the light source are capacitively coupled. In the modulation method of the invention, when an average potential fluctuates at an input terminal of the light source, a potential fluctuation is externally provided using a control circuit such that a normal phase side and a reverse phase side become equal to each other in a time constant of the fluctuation in average potential, and transient states of the average potentials at the normal phase side and reverse phase side are equalized and cancel each other as in-phase components of a signal input to the light source, which allows an optical signal to be normally transmitted from the light source.

Abstract: The present invention aims to provide a muffling structure of a vent pipe and a muffling structure of a case, which is capable of muffling in a wide frequency range and preventing vent resistance in the air pipe or the case from deterioration.

Abstract: A light source comprising sidelight type backlight light guide plate (L), wherein a transmittance angle dependent layer (T1) which transmits normally incident light and reflects obliquely incident light is disposed on one surface of the sidelight type backlight light guide plate (L), and a reflection plate (R) having a repetitive slope structure is disposed on the other surface of the sidelight type backlight light guide plate (L). The invention light source is less in absorption loss due to repetition of light reflection and the like.

Abstract: A polarization component, capable of efficiently reflecting an obliquely transmitted light beam toward a light source without degrading the transmission-polarization property of a perpendicular incident light beam, is provided. A C-plate having an oblique retardation of at least ?/8 with respect to a light beam inclined by at least 30° is disposed between at least two reflective circular polarizer layers whose selective reflection wavelength bands of polarized light overlapping each other. A combination of a reflective linear polarizer and a quarter wavelength plate may be used instead of the reflective circular polarizer. Alternatively, a combination of two reflective linear polarizer layers and two quarter wavelength plate layers (Nz?2) disposed therebetween can provide a similar effect. Further, a combination of two reflective linear polarizer layers and a half wavelength plate (Nz?1.5) disposed therebetween may be used.