摘要:
An antenna device includes: a radiator having a meander portion; and a conductor shorter than the radiator which is disposed opposite to the radiator. A coaxial cable is connected to the radiator and conductor. Respective line lengths of the radiator and conductor satisfy a predetermined relation with respect to a wavelength of a signal to be transmitted and received. The antenna device achieves at least one of improved antenna characteristics, downsizing, and improved mechanical strength.
摘要:
An antenna device includes radiation elements formed on a common antenna board, a feeding unit for feeding the radiation elements, and a ground plate provided in electrically-spaced relation to the radiation elements. The ground plate is mounted on a box-like metal body to form a short-circuit therewith. The radiation elements may have different line lengths for transmitting and receiving a plurality of wavelengths. The feeding unit may include a first radiation element having a different electrical length than a second radiation element, a first feed point for feeding electric power to the first radiation element, and a second feed point for feeding radiation elements are grounded to the ground plate at respective first and second ground points. The difference from the first and second feed points to their respective ground points are different from one another. The antenna device may have a value equal to (H)÷(&Lgr;), where (H) is the distance between the radiation elements and the ground plate, and (&Lgr;) is a wavelength of at least one frequency transmitted or received by the antenna device, and the distance H satisfies a relationship of 1÷250≦(H)÷(&Lgr;)≦1÷100.
摘要:
It is intended to provide a heat sink unit and an electronic apparatus capable of efficiently cooling a plurality of semiconductor devices and taking action for unnecessary electromagnetic waves. There are provided a plurality of fan units and electromagnetic shielding means for cutting off electromagnetic waves on a heat sink substrate. It is also provided a heat sink substrate, a unit having a fan for supplying fluid to the heat sink substrate and driving means for rotating the fan, and electromagnetic shielding means provided for the heat sink substrate.
摘要:
A surface lighting device has one single light source and a light-guide-board. The board includes a light-guiding-section and a light-emitting-section. A shorter side of the light-guiding-section is not more than 8 mm, and an area of the light-emitting-section is not less than 500 mm2. The light-emitting-section has the following features: (1) a ratio of min. luminance vs. max. luminance of is not less than 0.3; (2) an average luminance ranges from 1 cd/m2 to 200 cd/m2, and (3) a change value in luminance per unit length is not more than (average luminance)×100 cd/m3. Employing plural light-emitting-elements in the light source allows the lighting device to produce versatile colors. The light source, light-guide-board and a holder are structured and shaped in optimum way, so that unevenness in luminance of the device is reduced. An LCD unit incorporating this surface lighting device increases its display quality, and a portable terminal incorporating this LCD unit produces easy-to-lead display.
摘要翻译:表面照明装置具有单个光源和光导板。 该板包括导光部和发光部。 导光部的短边不大于8mm,发光部的面积不小于500mm 2。 发光部分具有以下特征:(1)最小的比率。 亮度与最大值 亮度不小于0.3; (2)平均亮度为1cd / m 2〜200cd / m 2,(3)每单位长度的亮度变化值不大于(平均亮度)×100cd / m 3。 在光源中采用多个发光元件允许照明装置产生通用颜色。 光源,导光板和保持器以最佳方式构造和成形,从而降低了装置的亮度不均匀性。 包含该表面照明装置的LCD单元增加其显示质量,并且结合该LCD单元的便携式终端产生易于引导的显示。
摘要:
A surface lighting device has one single light source and a light-guide-board. The board includes a light-guiding-section and a light-emitting-section. A shorter side of the light-guiding-section is not more than 8 mm, and an area of the light-emitting-section is not less than 500 mm2. The light-emitting-section has the following features: (1) a ratio of min. luminance vs. max. luminance is not less than 0.3; (2) an average luminance ranges from 1 cd/m2 to 200 cd/m2, and (3) a change in luminance per unit length is not more than (average luminance)×100 cd/m3. Employing plural light-emitting-elements in one light source allows the lighting device to produce versatile colors. The light source, light-guide-board and a holder are structured and shaped in optimum way, so that unevenness in luminance of the device is reduced. An LCD unit incorporating this surface lighting device increases its display quality, and a portable terminal incorporating this LCD unit produces easy-to-lead display.
摘要翻译:表面照明装置具有单个光源和光导板。 该板包括导光部和发光部。 导光部的短边不大于8mm,发光部的面积不小于500mm 2。 发光部分具有以下特征:(1)最小的比率。 亮度与最大值 亮度不小于0.3; (2)平均亮度范围为1cd / m 2〜200cd / m 2,(3)每单位长度的亮度变化不大于( 平均亮度)×100cd / m 3。 在一个光源中采用多个发光元件允许照明装置产生通用颜色。 光源,导光板和保持器以最佳方式构造和成形,从而降低了装置的亮度不均匀性。 包含该表面照明装置的LCD单元增加其显示质量,并且结合该LCD单元的便携式终端产生易于引导的显示。
摘要:
A card reader is provided inside of a body cover which has a card transfer path, a card transfer mechanism including a series of card transfer rollers and driven rollers, and a second antenna unit defining a wireless communication device which is positioned between the card transfer path and the body cover (1). Thus, wireless transmission and reception of data can be executed with the second antenna unit by bringing a card having a first antenna unit in close proximity to a card access area provided on the body cover, and also by inserting the card in the card transfer path.
摘要:
A surface lighting device has one single light source and a light-guide-board. The board includes a light-guiding-section and a light-emitting-section. A shorter side of the light-guiding-section is not more than 8 mm, and an area of the light-emitting-section is not less than 500 mm2. The light-emitting-section has the following features: (1) a ratio of min. luminance vs. max. luminance of is not less than 0.3; (2) an average luminance ranges from 1 cd/m2 to 200 cd/m2, and (3) a change value in luminance per unit length is not more than (average luminance)×100 cd/m3. Employing plural light-emitting-elements in the light source allows the lighting device to produce versatile colors. The light source, light-guide-board and a holder are structured and shaped in optimum way, so that unevenness in luminance of the device is reduced. An LCD unit incorporating this surface lighting device increases its display quality, and a portable terminal incorporating this LCD unit produces easy-to-lead display.
摘要翻译:表面照明装置具有单个光源和光导板。 该板包括导光部和发光部。 导光部的短边不大于8mm,发光部的面积不小于500mm 2。 发光部分具有以下特征:(1)最小的比率。 亮度与最大值 亮度不小于0.3; (2)平均亮度为1cd / m 2〜200cd / m 2,(3)每单位长度的亮度变化值不大于(平均亮度)×100cd / m 3。 在光源中采用多个发光元件允许照明装置产生通用颜色。 光源,导光板和保持器以最佳方式构造和成形,从而降低了装置的亮度不均匀性。 包含该表面照明装置的LCD单元增加其显示质量,并且结合该LCD单元的便携式终端产生易于引导的显示。
摘要:
The present invention aims at providing an electronic component that can be readily reduced in size. Further, even when the electronic component is reduced in size, the miniaturized electronic component has (i) a wide range in capacitance, (ii) is allowed to be produced easily, (iii) has excellent electrical characteristics and (iv) can prevent defects due to a poor connection between the electronic component and a circuit board caused by warpage of the circuit board and the like when the electronic component is connected to the circuit board. The electronic component includes a capacitor element with a pair of lead terminals and an exterior packaging material disposed so as to encapsulate the capacitor element. The maximum length of the exterior packaging material is 7.5 mm or less and the maximum length of the capacitor element is 5.5 mm or less. Capacitance C of the capacitor element satisfies an inequality of 4 pF≦C≦4700 pF and a DC break down voltage BDV satisfies an inequality of BDV≧4.5 KV. The smallest spacing between the pair of lead terminals ranges from 3.0 mm to 6.0 mm.
摘要:
In an optical pickup, an optical guide member is provided in an optical path of light from a light source, and has a plurality of inclined surfaces inclined with respect to a light beam emitted from the light source. A light-receiving element is provided for receiving light and for converting the received light into an electrical signal. The optical guide member and the light-receiving element are contained in a packaging member. The light beam from the light source is reflected by the plurality of inclined surfaces of the optical guide member, and then are directed to a recording medium. The reflected light from the recording medium is directed to the light-receiving element. At least one of dry air and inert gas such as nitrogen gas is charged in the interior of the packaging member at a pressure of 0.5 atm to 1.5 atm, thereby preventing the optical characteristics from being degraded.
摘要:
A surface lighting device has one single light source and a light-guide-board. The board includes a light-guiding-section and a light-emitting-section. A shorter side of the light-guiding-section is not more than 8 mm, and an area of the light-emitting-section is not less than 500 mm2. The light-emitting-section has the following features: (1) a ratio of min. luminance vs. max. luminance is not less than 0.3; (2) an average luminance ranges from 1 cd/m2 to 200 cd/m2, and (3) a change in luminance per unit length is not more than (average luminance)×100 cd/m3. Employing plural light-emitting-elements in one light source allows the lighting device to produce versatile colors. The light source, light-guide-board and a holder are structured and shaped in optimum way, so that unevenness in luminance of the device is reduced. An LCD unit incorporating this surface lighting device increases its display quality, and a portable terminal incorporating this LCD unit produces easy-to-lead display.
摘要翻译:表面照明装置具有单个光源和光导板。 该板包括导光部和发光部。 导光部的短边不大于8mm,发光部的面积不小于500mm 2。 发光部分具有以下特征:(1)最小的比率。 亮度与最大值 亮度不小于0.3; (2)平均亮度为1cd / m 2〜200cd / m 2,(3)每单位长度的亮度变化不大于(平均亮度)×100cd / m 3。 在一个光源中采用多个发光元件允许照明装置产生通用颜色。 光源,导光板和保持器以最佳方式构造和成形,从而降低了装置的亮度不均匀性。 包含该表面照明装置的LCD单元增加其显示质量,并且结合该LCD单元的便携式终端产生易于引导的显示。