62results about How to "Inhibit heat generation" patented technology

A motor unit includes a motor (12); and a control board configured to execute a control to drive the motor (12). The control board includes a first control board (80) and a second control board (70). The first control board (80) is provided such that a mounting space for at least one electronic component perpendicularly intersects with an extension line extending from a shaft end part (11a) of a motor shaft (11) and extends along a shaft radial direction so as to allow the at least one electronic component to be disposed along the shaft radial direction. The second control board (70) is provided such that a mounting space for at least one electronic component extends along a shaft length direction so as to allow the at least one electronic component to be disposed along the shaft length direction. The motor (12) and the control board are unitized.

The capacitor includes element (1) provided with electrodes at its both ends; metal case (2) with cathode electrode (1c) of element (1) joined to a joint part on the inner bottom surface of metal case (2), containing cathode electrode (1c); and a terminal plate with anode electrode (1b) of element (1) joined to a joint part on the inner surface of the terminal plate, sealing the opening of metal case (2). S1<S2<S3 holds, where S1 is the area of joint part (2a) of metal case (2); S2 is the area of joint part (3a) of the terminal plate; S3 is the touching area of the inner bottom surface and element (1), excluding joint part (2a) of metal case (2). When the terminal plate arranged on element (1) inside metal case (2) is pressurized, joint part (2a) of metal case (2) crushes cathode electrode (1c) of element (1), and then joint part (3a) of the terminal plate crushes anode electrode (1b) of element (1). Accordingly, both electrodes (1b, 1c) of element (1) can be laser-welded stably in a desired crush amount, thereby improving reliability of joining.

A driving circuit according to an embodiment of the invention includes: a switching unit for sequentially switching between a first operation of applying a positive gray-scale voltage to odd-numbered data lines and applying a negative gray-scale voltage to even-numbered data lines and a second operation of applying a negative gray-scale voltage to odd-numbered data lines and applying a positive gray-scale voltage to the even-numbered data lines; a plurality of short-circuit switches for short-circuiting a pair of adjacent odd-numbered data lines and a pair of adjacent even-numbered data lines to produce a plurality of pairs of short-circuited data lines in a switching period between the first operation and the second operation; and a plurality of common node-connected switches corresponding to the plurality of data line pairs and short-circuiting a corresponding one of the data line pairs to a common node.

An object of the invention is to suppress the amount of heat generated by a light emitting diode and prevent the light emitting diode from being overheated without reducing the amount of emitted light even when the light emitting diode is a high-power light emitting diode. A light emitting device is configured so that one or more light emitting diodes (11) are lighted by a lighting circuit (12). A DC power is converted into a pulse power by a switching regulator (13) of this lighting circuit (12) and the voltage of a pulse power converted by this switching regulator is lowered by an output control portion (14). The pulse width of a pulse power lowered in voltage by this output control portion is adjusted by a pulse width adjusting oscillation means (16), and the current of a pulse power adjusted in pulse width by this pulse width adjusting oscillation means is limited by a limiting resistor (17). The light emitting device is configured so that a pulse power limited in current by this limiting resistor is outputted to a light emitting diode.