62results about How to "Suppresses heat radiation" patented technology

Provided is a DC-DC converter with improved power conversion efficiency. A transistor which is incorporated in the DC-DC converter and functions as a switching element for controlling output power includes, in its channel formation region, a semiconductor material having a wide band gap and significantly small off current compared with silicon. The transistor further comprises a back gate electrode, in addition to a general gate electrode, and a back gate control circuit for controlling a potential applied to the back gate electrode in accordance with the output power from the DC-DC converter. The control of the potential applied to the back gate electrode by the back gate control circuit enables the threshold voltage to decrease the on-state resistance when the output power is high and to increase the off-state current when the output power is low.

A non-volatile memory element includes a lower electrode, an upper electrode, a recording layer arranged between the lower electrode and the upper electrode and containing a phase change material, and a bit line directly arranged on the upper electrode. The bit line is formed to be offset to the recording layer. With this arrangement, a contact area between the recording layer and the upper electrode and a contact area between the upper electrode and the bit line can be reduced without providing an interlayer insulation film between the upper electrode and the bit line. Thus, heat radiation to the bit line can be suppressed while the upper electrode and the bit line are connected without using a through-hole.

A fuel cell stack includes a stack body formed by stacking a plurality of solid oxide fuel cells in a stacking direction. The fuel cell stack includes wall plate members and fuel cell support members. The wall plate members are provided in the stacking direction of the stack body around the sides of the stack body. Each of the fuel cell support members includes a composite layer made of composite material of alumina fiber and vermiculite. The fuel cell support members are interposed between the wall plate members and the sides of the stack body, and apply a load to the sides of the stack body in directions of a separator surface.

A chemical reaction apparatus includes a solid body which has an outer surface, and in which at least one flow path which allows a chemical medium to flow is formed. This body has a heating element which heats the chemical medium in the flow path to accelerate a chemical reaction of the chemical medium, and a heat radiation preventing film which covers at least a portion of the outer surface of the body, and prevents radiation of heat generated by the heating element from a portion of the outer surface.

A thermal head includes a glass layer having a protruding section formed on one surface and a concave groove section formed on the other surface facing the protruding section, a heat generation resistor provided on the protruding section, and a pair of electrodes provided to both sides of the heat generation resistor, and a part of the heat generation resistor exposed between the pair of electrodes is defined as a heat generation section, the protruding section has a smaller curvature radius in both sides than a curvature radius in a central portion, and a width of the groove section is one of equal to and larger than a length of the heat generation section.

A device for driving capacitive light emitting elements includes a plurality of electrical charge recovery switches that send a current corresponding with an electrical charge, which has accumulated in a capacitor, individually to a plurality of drive electrodes connected to the respective capacitive light emitting elements. The electrical charge recovery switches also supply a current corresponding with the electrical charge that has accumulated in each of the capacitive light emitting elements to the capacitor individually via each of the drive electrodes. The driver device also includes a plurality of output buffers that apply a pixel-data-dependent voltage to the drive electrodes. It is determined, for each drive electrode, whether the voltage of the drive electrode has shifted from a high voltage to a low voltage or from a low voltage to a high voltage on the basis of the pixel data. If the voltage shift has occurred on the drive electrode concerned, the associated electric charge recovery switch is set to the ON state over a predetermined period. If no voltage shift has occurred, the electrical charge recovery switch is set to the OFF state.

A heating device of a PCV valve includes a PCV valve, a conduit and a bush. The PCV valve contacts the bush. The bush includes an outward protrusion. The outward protrusion includes a curved surface contacting an outside surface of the conduit in a manner of a surface-to-surface contact. Therefore, when the conduit is heated by engine cooling water, the bush contacting the conduit in the manner of a surface-to-surface contact is heated and the PCV valve contacting the bush is heated. Therefore, the PCV valve can be heated by the engine cooling water.