246results about How to "Unnecessary to provide" patented technology

An exposure apparatus for exposing mask patterns on a sensitive plate comprises a set (for X and Y direction) of a laser interferometer for measuring a position of a wafer stage and satisfying Abbe's condition with respect to a projection lens and a set (for X and Y direction) of the laser interferometer and satisfying Abbe's condition with respect to off-axis alignment system. When a fiducial mark on the wafer stage is positioned directly under the projection lens, a presetting is performed so that measuring values by the two sets of laser interferometers are equal to each other.

A stocker 1 includes a storage FOUP 20, plural purge units 50, a measurement FOUP 30 and a stacker crane 60. The storage FOUP 20 stores a semiconductor wafer inside. The measurement FOUP 30 includes a flow meter inside. The purge unit 50 includes a purge shelf 51 having plural purge tables 54 for placing the storage FOUP 20, and a nitrogen gas is supplied into the storage FOUP 20 placed on the purge table 54. The stacker crane 60 transports the storage container 20 onto the purge table 54, and the measurement FOUP 30 is transported between the plural purge tables 54.

A drive shaft assembly for a downhole motor includes a drive shaft formed with convexly spherical bearing surfaces on each end, and end housings with concavely spherical bearing surfaces for mating contact with the spherical bearing surfaces of the drive shaft, thereby facilitating omni-directional articulation between the drive shaft and the end housings while transferring axial thrust loads between the drive shaft and end housings across the interface of the mating spherical bearing surfaces. Torque is transferred between the drive shaft and end housings through two or alternatively four swivelling drive keys mounted to each end of the drive shaft and engageable with complementary drive key slots in the end housings. Full and constant torque-transferring contact is thus provided between the swivelling drive keys and the end housings irrespective of any angular offset between the drive shaft and the end housings, resulting from omni-directional articulation of the drive shaft relative to the end housing. The omni-directional center of rotation at each end of the drive shaft coincides with the geometric centerpoint of the corresponding convexly spherical bearing surface, which corresponds to the intersection of the drive shaft's rotational axis, the end housing's rotational axis, and the drive key swivel axis.

Provided is a liquid crystal display device and a backlight unit that are of high quality and have a simple configuration that a mechanism cooling a cooling medium is not included. Included are a liquid crystal display panel and an LED backlight unit including an LED light source emitting light toward the panel, and a chassis plate on which the light source is disposed, the plate including a through flow path for cooling air dissipating heat from the light source, wherein the path includes a main duct introducing the cooling air and disposed along one side of the panel, and a branch duct branching off from the main duct, aligned along a disposed direction of the light source, and including an exhaust port disposed at an end of the branch duct and discharging the cooling air to outside of the device.

A counterweight for a hydraulic shovel, which is applicable to a compact to large-sized hydraulic shovels, and is capable of realizing favorable engine maintainability and assurance of sufficient mass, is provided. For this purpose, supporting column portions (12b, 12c) are vertically provided at left and right of a counterweight (12). The left and right supporting column portions are constituted as an increase amount of mass of the counterweight. At least one of a floor frame (30), a canopy (40), outer casings (14, 16) and engine partition walls (33a, 33b) is supported at the left and right supporting column portions. Further, an engine (13) is placed at a position fronting to between the left and right supporting column portions.

A rotation angle detection device for detecting a rotation angle of an object has a substantially cylinder-shaped yoke, a magnetism generation unit which is fixed to an inner surface of the yoke, a magnetism detection member which is arranged substantially in a center axis of the yoke, at least one bearing which rotatably supports the yoke, and a support member which holds the bearing. The yoke is made of a magnetic metal, and fixedly mounted at the object to be rotatable integrally with the object. The magnetism generation unit generates a magnetic field substantially perpendicular to the center axis of the yoke. The magnetism detection member generates an output corresponding to a variation of the magnetic field to detect the rotation angle of the object relative to the magnetism detection member.

A liquid crystal drive device having a differential-type input circuit including a differential amplification stage for receiving a differential signal and a buffer stage for generating an output signal on the basis of an output of the differential amplification stage, the liquid crystal drive device for receiving a signal of display data via the input circuit and outputting a signal for driving a liquid crystal panel on the basis of the display data, wherein a liquid crystal driving voltage VLCD larger than a power supply voltage VCC for logic to be supplied to the operation voltage buffer stage is supplied to the differential amplification stage of the input circuit. A standby function of interrupting an operation current of the differential amplification stage in a period where no display data is received is provided.

A method and a system for cleaning the glass surface of an object, such as a surface light, a run way guide light, or a reflector, installed on various pavements or roads, by propelling a cleaning agent from a blast nozzle to the glass surface. The blast nozzle is installed on the front end of an arm of a working robot mounted on a truck. A truck mounted with a cleaning agent blaster and a working robot (21) provided with a blast nozzle (23) and a CCD camera (24) at the forward end of a manipulator is stopped at a specified position in the vicinity of an object to be cleaned, i.e. surface light or a reflection mirror (30). Based on an image of the object taken by the CCD camera (24), dimensions are recognized from distance information through processing by a vehicle-mounted computer, the image shape of the object is collated with a stored shape and recognized, and then positional information of the recognized object is searched. Cleaning agent is propelled from the blast nozzle (23) at the forward end of the manipulator (22) toward the object while measuring the extent of cleaning, brightness or light intensity of the cleaned object is determined by the CCD camera, and automatic cleaning is performed.

The present invention relates to a drive mechanism of an electric vehicle that is realized only by means of one or more electric motors that are connected to at least one storage battery, wherein a generator is provided that can be connected for supplying energy to the drive mechanism, wherein the generator is coupled to a Wankel engine that drives only the generator when needed, but delivers no driving power as torque to the drive train of the electric motor or motors of the drive mechanism. A method for operating an electric vehicle is also presented.

A shaft portion 2a of a platen roller 2 is inserted into an elongated hole-like recess 5a of a platen frame 5 so as to be movable therein. A release arm 9 having an engagement portion 9b engaged with a shaft portion 2a is swingably provided and is urged by a spring member 10. A switch 11 has an intercept 11a which can be contacted/separated to/from the release arm 9. When a thermal head 1 is moved against a spring force of a spring member 4, the release arm 9 follows the thermal head 1 to be allowed to swing by the spring member 10, thereby moving the shaft portion 2a in the recess 5a. When the switch 1 detects movement of the release arm 9, it is determined that recording is impossible since the thermal head 1 and the platen roller 2 are spaced apart from each other.

The amplitude expansion circuit as a main part of a drive circuit includes: a VM DC power supply line to which a voltage VM is applied; a VH DC power supply line to which a voltage VH roughly twice as high as the voltage VM is applied; an inverter circuit receiving a pulse signal oscillating between the ground voltage and the voltage VM; another inverter circuit receiving a pulse signal oscillating between the voltage VM and the voltage VH in correspondence with the oscillation of the voltage level of the above pulse signal; a p-channel MOSFET having a gate receiving an output from the inverter circuit; another p-channel MOSFET having a gate connected to the VM DC power supply line; an n-channel MOSFET having a gate connected to the VM DC power supply line; and another n-channel MOSFET having a gate receiving an output from the other inverter circuit. A common connection node of the p-channel MOSFET and the n-channel MOSFET works as the output terminal of the amplitude expansion circuit.

An AGC circuit includes: a variable gain amplifier circuit having a gain controlled with a gain control signal; a rectifier circuit for rectifying an output signal of the variable gain amplifier circuit; a voltage comparator for comparing a rectified signal with a threshold voltage; an up/down counter that switches between up-counting and down-counting according to the level of an output voltage of the voltage comparator; and a D/A converter circuit for outputting a voltage corresponding to a count value of the up/down counter. The gain control signal supplied to the variable gain amplifier circuit corresponds to the voltage output from the D/A converter circuit, and the threshold voltage for the voltage comparator is a voltage corresponding to the voltage output from the D/A converter circuit.