摘要:
A metal halide lamp includes an arc tube containing at least mercury and metal halide. A pair of opposed main electrodes extend in the arc tube. A lamp voltage is applied between the main electrodes. The main electrodes have respective distal ends which are spaced from each other by a predetermined distance “d”. The predetermined distance “d” and the lamp voltage “Vla” which occurs during stable rated operation of the lamp satisfy a relation as follows: Vla/d ≦24(V/mm)
摘要:
An apparatus that obtains a straight discharge arc during the whole lighting period, as well as provides a discharge lamp-lighting apparatus which can form a plurality of luminous intensity distribution patterns by changing the shape of the discharge arc. By supplying a lighting waveform equal to an acoustic resonance frequency which lighting waveform excites the mode to make the discharge arc straight. The acoustic resonance frequency is determined by the sound velocity in the discharge space medium and the height of a section orthogonal area to the electrode axis to the discharge lamp. The shape of the discharge arc at the time of rated lighting can be made substantially straight. By supplying the lighting waveform which amplifies the amplitude of the compressional wave emitted from the discharge arc during the period when the vapor pressure of the filler of the discharge lamp is low, the shape of the discharge arc can be made straight during the whole lighting period. By changing the ratio of the acoustic resonance frequency component, the shape of the discharge arc can be changed.
摘要:
Provided are a layered heat exchanger that can prevent deterioration of sealing property due to deformation of sealing portions of inlet and outlet header sections when a PTC heater is sandwiched between flat heat exchanger tubes, and is pressed to be brought into close contact with the flat heat exchanger tubes, and a heat medium heating apparatus and a vehicle air-conditioning apparatus using the layered heat exchanger.
摘要:
A heat medium heating device including flat heat exchange tubes and PTC heaters stacked in a plurality of layers, the heat medium heating device being capable of correctly and accurately detecting the temperature of a circulating heat medium; and a vehicular air-conditioning device including the same. In a heat medium heating device, flat heat exchange tubes each including an inlet header part and an outlet header part and PTC heaters are stacked in a plurality of layers, and are incorporated in a casing including a heat medium inlet path and a heat medium outlet path communicated with the inlet and outlet header parts. In the heat medium heating device thus configured, an inlet temperature sensor and an outlet temperature sensor that detect the temperature of a heat medium are provided around the inlet and outlet header parts of the lowermost flat heat exchange tube in the stacked structure.
摘要:
Provided is a heat medium heating unit comprising a plurality of flat heat exchange tubes, PTC heaters incorporated between flat tube portions, a heat exchanger pressing member that presses from one side the flat tubes and the PTC heaters against the inner surface of a casing, and a control board that is disposed above the heat exchanger pressing member and that controls the PTC heaters. A terminal extending upwards from an electrode plate directly connects to a terminal supports of the control board. On an inner surface of the casing, since a positioning means that engages with the terminal to position the terminal and the plate, the thermal contact resistance between the flat heat exchanger tubes and the PTC heaters is reduced.
摘要:
The present invention provides a plasma display panel driving method and a plasma display device, each of which is capable of securing image quality and realizing an improvement of a drive margin and a reduction in power consumption even in the case of an ultra high definition panel. The present invention divides a plurality of display electrode pairs into a plurality of display electrode pair groups. For each of the display electrode pair groups, the present invention divides one field period into a plurality of sub-fields, each including an address period and a sustain period, such that the address periods with respect to the display electrode pair groups do not overlap one another, the address period being a period in which an address process of causing address discharge in the discharge cell which should emit light is carried out, the sustain period being a period in which first and second sustain pulses are applied to a scan electrode and a sustain electrode. The present invention provides the sub-field in which the cycle of each of the first and second sustain pulses is longer than 5.5 μs within such a range that a time of the sustain period does not exceed Tw×(N−1)/N, where N denotes the number of display electrode pair groups, and Tw denotes a time necessary for carrying out the address process with respect to the discharge cells corresponding to all the display electrode pairs.
摘要:
In a driving method of a plasma display panel of the present invention, plural display electrode pairs are divided into plural display electrode pair groups and one field is divided into plural sub-fields. The length of the sustain period is compared to the length of the erase period. If the sustain period is longer than the erase period, sustain discharge and erase discharge are performed for each of the display electrode pair groups, while if the sustain period is shorter than the erase period, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group. For a sub-field with a largest luminance weight or a sub-field with a highest lighting ratio, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group without fail.
摘要:
An object is to provide a method for driving a PDP, which may be a super high-definition panel, and a PDP device capable of assuring the sufficient number of subfields to maintain the image quality and displaying images with the sufficient luminance.To achieve the above object, one field period is divided into a plurality of subfields each having an address period and a sustain period. A plurality of display electrode pairs are divided in to a plurality N of display electrode pair groups. A start time point of a subfield is set for each display electrode pair group. When a time required for performing one address operation on all the discharge cells of the panel is represented by Tw, the time length of a sustain period of each of the subfields in each of the display electrode pair groups is defined not to exceed Tw×(N−1)/N.
摘要:
A pair of internal electrodes are disposed at both ends of a lamp. A first voltage including a positive DC voltage superimposed on a substantial rectangular waveform voltage is applied to one of the internal electrodes. A second voltage including a negative DC voltage superimposed on the substantial rectangular waveform voltage is applied to the other internal electrode. The dark portion occurring substantially at the center in the longitudinal direction of the lamp becomes invisible, so that the brightness distribution is improved.
摘要:
A space is largely defined inside of a lid 14, thus enhancing the freedom of a design of members to be contained inside of the lid 14. An airtight container 11 includes a container unit 12 which contains therein a plurality of semiconductor wafers W, the lid 14 which closes the container unit 12, and a seal 74 which air-tightly seals a clearance defined between the container unit 12 and the lid 14. A support groove 41 is formed at an inside plate 30A of the lid 14 so as to support the semiconductor wafers W one by one. The support groove 41 is formed at the inside plate 30A of the lid 14 in such a manner as to be opened toward the container unit 12, and is constituted of a slit, at and into which the semiconductor wafers are fitted and supported one by one. A V-shaped groove 42 is formed at the bottom of the support groove 41. A support groove 61 having another configuration includes a relief groove 62 formed at the inside plate 30A, and a thin plate supporter 63 which is disposed in a manner corresponding to the relief groove 62 in a thin plate supporting space S defined between a cover plate 65 and the inside plate 30A, so as to support one by one the semiconductor wafers W fitted into the relief groove 62.