摘要:
An LED lightbulb is configured to properly illuminate a broader region. The LED lightbulb includes a light emitting unit, a pedestal, a power source unit, a heat dissipator, a base, and a globe swelling toward one side in a first direction for enclosing the light emitting unit. The globe is configured to diffusingly transmit light from the light emitting unit. The light emitting unit provides a light amount not less than 50% of the maximum light amount in a region not exceeding ±60° about the central axis extending in the first direction set as 0°. The globe provides a light amount not less than 50% in a region exceeding ±125° about the central axis set as 0°.
摘要:
A light emitting diode (LED) lamp includes a plurality of LED chips and a heat dissipation member configured to dissipate heat generated from the LED chips. The heat dissipation member includes a tubular unit having a constant cross-section perpendicular to an axial direction, and a plurality of fins, each of which extends outwardly from the tubular unit and extends in the axial direction, having a constant thickness in the axial direction.
摘要:
An LED lamp A1 includes a plurality of LED modules 1 and a substrate 2 on which the LED modules 1 are mounted in a row. A light guide 3 covering the LED modules 1 is provided on the substrate 2. The light guide 3 is held in close contact with each of the LED modules. With this arrangement, a proper amount of light is obtained with the use of a smaller number of LED modules 1 or with less power consumption.
摘要:
An LED lamp A1 includes a plurality of LED modules 1 and a substrate 2 on which the LED modules 1 are mounted in a row. A light guide 3 covering the LED modules 1 is provided on the substrate 2. The light guide 3 is held in close contact with each of the LED modules. With this arrangement, a proper amount of light is obtained with the use of a smaller number of LED modules 1 or with less power consumption.
摘要:
An LED lighting device A1 includes a plurality of LED chips 32, an LED unit 2 in which the LED chips 32 are mounted, and a mount 1 holding the LED unit 2. This arrangement allows the appearance or structure of the LED lighting device to be adapted for various applications. For instance, the LED lighting device may be mounted on an indoor ceiling to illuminate the floor surface or an upper part of a wall surface.
摘要:
A computer determines a download server for downloading contents into a terminal device from among a plurality of servers storing the identical contents therein, by accepting a download request for the contents from the terminal device, detecting a time at which the download request was accepted and determining the download server in accordance with the detected time.
摘要:
An interpolation parallel AD converter is provided in which a switch is installed at each pre-amplifier in a first pre-amplifier array for selectively short-circuiting a portion between a comparison input end and a reference input end thereof, while a load transistor, a switch for selectively diode-connecting the load transistor, and a capacitor for keeping a voltage when the load transistor is diode-connected are installed in a pre-amplifier in a second pre-amplifier array. An offset occurring in each pre-amplifier in the first pre-amplifier array is suppressed by a compression effect of using a gain difference between a reset mode and an amplification mode.
摘要:
An electronic device including an internal battery and an expansion battery can not be operated when the charge in both batteries is drained. Accordingly, when charging the batteries, a control circuit, after confirming that the internal battery is not fully charged, sets an FET to a conductive state and an FET to a non-conductive state. The result is that charging occurs from the internal battery provided the internal battery is not fully charged. After the internal battery is fully charged, the control circuit sets the FET to a non-conductive state and the FET to a conductive state so that this time the expansion battery is charged. Thus, if a short operating time is sufficient, the internal battery can be rapidly charged so that the electronic equipment can be operated by itself after charging for only a short period.
摘要:
An LED lamp includes a plurality of LED modules arranged in direction x, a tubular enclosure for housing the LED modules that is open at ends spaced from each other in direction x, and end caps respectively closing the ends of the tubular enclosure in direction x. Each of the end caps is configured to diffuse light from the LED modules while transmitting the light, and includes an emission surface for emitting light in a direction z perpendicular to direction x. This arrangement ensures that the LED lamp has a good appearance even when it is made long.