Abstract: A permanent magnet rotor type electric motor is formed of a stator core generating a rotation magnetic field, and a rotor core rotationally situated inside the stator core. The rotor core includes a first core member for generating a magnet torque, permanent magnets embedded in the first core member for forming magnetic poles, and a second core member for generating a reluctance torque without having a permanent magnet therein. The second core member is coaxially united with the first core member so that the rotor core is divided into the first core member for generating the magnet torque and the second core member for generating the reluctance torque.

Abstract: In a permanent magnet rotor type electric motor having a stator core generating a rotation magnetic field and provided therein with a rotor core in which each magnetic pole is formed by a permanent magnet, the rotor core is fabricated by coaxially and unitedly joining a first core member and a second core member, in which a first permanent magnet of a predetermined cross-section shape is embedded per magnetic pole in the first core member, and a second permanent magnet which is made of a different material and has a different cross-section shape from those of the first permanent magnet is embedded per magnetic pole in the second core member, thereby achieving the permanent magnet rotor type electric motor having the performance and size appropriate for the intended use.

Abstract: In an air conditioner, a supporting base having a plurality of bearing cylinder portions is attached to an outlet of a housing of the air conditioner. Each shaft of wind horizontally direction plates is located in the outlet of the housing and is disposed in the bearing cylinder portion through first and second bearing bushes. The first bearing bushes hold the wind horizontally direction plates in a cantilever manner. A heat insulation material is adhered onto the supporting base. The wind horizontally direction plates can be easily attached to the air outlet after the heat insulation material is installed, and the moisture condensation is prevented.

Abstract: An air conditioner comprises a freezing cycle circuit, which includes, successively provided on a main duct line 11 in the mentioned order, a compressor 10, a four-way valve 12, an external heat exchanger 13, a pressure reducer 14, and an internal heat exchanger 11, the main duct line 11 branching into at least an upper and a lower part coolant flow line 20 and 30 in the internal heat exchanger 15, and an on-off valve 10 provided on the upper part coolant flow line 20 and closed in a low capacity cooling operation. The air conditioner can gently cool and gently dry air in a room without causing chillness to be felt.

Abstract: In an air conditioner, at least one up-down wind direction board rotates in an up-down direction around almost horizontal rotation axis within an air outlet, and a plurality of lateral wind direction boards rotating laterally are provided around rotation axes as the center which are almost orthogonal to the rotation axis of said up-down wind direction board. Also a diffuser constituting a part of the air outlet is provided rotationally around an almost horizontal rotation axis as the center at the lower portion of the air outlet. A motor for driving the up-down wind direction board is provided at the side of one side wall portion of the air outlet. The up-down wind direction board is set by said motor to any arbitrary angle of tilt between the initial stop position closing said air outlet and maximum open position almost vertically downward.

Abstract: In an air conditioner provided with at least one longitudinal louver rotating in a vertical direction with an almost horizontal rotation axis as the center and with a number of lateral louvers rotating in a lateral direction with a rotation axis line almost perpendicular to the rotation axis line of the above-described longitudinal louver, a cover plate is provided at an upper wall portion of the above-described air outlet so that a specified space is formed between the cover plate and the upper wall portion, and each of the lateral louvers is attached at the cover plate by the medium of a bush with an arm and a connecting plate for connecting the lateral louvers formed at the bush to prevent the reduction of air blowing efficiency, generation of a noise, and condensation in an air outlet.

Abstract: Coupled to an error variance circuit 11 is an emission luminance characteristic acquisition circuit 20 that counts up, at a display number counter 21, the display number in the single or plural frames of the respective bits of image data by the counters, M in number, corresponding to said bits, then solves for display area percentage (Sk) dividing, at a display area percentage operation part 22, the display dot number as counted at a display number counter 21, by total dot number, and acquires the luminance deviation characteristic for each bit by means of an emission luminance deviation characteristic measuring part 24. The luminance deviation thus obtained is renewed for each frame and transferred to the error variance circuit 11, and processed for error variance on the basis of the emission luminance characteristic to be output at PDP.

Abstract: An error variance circuit, wherein a reproduced error, as detected at an error detection circuit, is added to the image signal of the input signal picture element of n bits, and wherein a variance output signal is converted into a signal of m (.ltoreq.n-l) bits and outputted to a display panel, includes a clear circuit that clears error at each frame and forcibly reduces the prior error to zero thus preventing excessive noise from preceding frames and non-image duration causing flickering of picture.