摘要:
A display device 1 is provided with an information electrode sheet 10 constructed of an information sheet bonded with an electrode sheet, a masking electrode sheet 11 constructed of a masking sheet bonded with an electrode sheet, an actuating frame 13 for relatively movably the sheets 10 and 12, a stepping motor 14 for driving the actuating frame 13, and a control unit 4. The masking sheet includes a plurality of slits. The information sheet includes a plurality of image lines which configure plural items of screen information. The control unit 4 causes the stepping motor 14 to relatively move the sheets 10 and 11 to switch between displays of screen information, while controlling voltage application to the electrode sheets to selectively generate a repulsive force and an attractive force by an electrostatic action between the sheets 10 and 11.
摘要:
There are provided a gripper mechanism and a movement mechanism which utilize an electromagnetic actuator which can secure a sufficient thrust force at least at a certain level over a wide range of displacement. The movement mechanism 30 includes a pair of electromagnetic actuators 21 F, 21 R disposed inside a pair of rails 35a, 35b, and an intermediate actuator 40 provided between the electromagnetic actuators 21 F, 21 R. The electromagnetic actuators 21 F, 21 R function as a gripper mechanism to be gripped by the rails 35a, 35b. The electromagnetic actuators 21 F, 21 R each include a displacement amplification mechanism 21A comprised of a magnetic body, and coils 26a, 26b, 26c, 26d provided in the displacement amplification mechanism 21A. A magnetic flux is generated in the magnetic body by passing an electric current through the coils 26a, 26b, 26c, 26d so as to displace the displacement amplification points L2x, L2y of the displacement amplification mechanism 21A.
摘要:
A display device is provided with a masking sheet 13 and an information sheet 12 which are disposed facing each other, a first electrode sheet 14 integrally provided with the information sheet 12, and a second electrode sheet 15 integrally provided with the masking sheet 13. This masking sheet 13 includes a plurality of slits 16 arranged obliquely with respect to a horizontal or vertical direction. The information sheet 12 includes a plurality of image lines 18 arranged to be aligned with the slits 16 for configuring a plurality of items of screen information. The electrode sheets 14 and 15 each include a plurality of linear electrodes 19 and 20 vertically arranged. Due to an electrostatic action, the electrode sheets 14 and 15 cause relative movement between the masking sheet 13 and the information sheet 12.
摘要:
An electrostatic actuator comprising a first member (1) having plural strip-like electrodes (4) which are insulated from each other and arranged in a predetermined direction and at predetermined spaces, a second member (10) whose surface facing the surface of the first member is in contact with it and made of a resistive substance, and a controlling means (11) which changes the voltages applied to the respective strip-like electrodes. The controlling means applies a predetermined voltage pattern of pulse voltages to the strip-like electrodes and causes the first and second members to move relatively to each other. The resistive substance in the second member is so selected that the time constant which is determined mainly by the volume resistivity and the dielectric constant of the substance is the double of the time being necessary in order that at least one of the first and second member moves relatively by the distance equal to the length between the electrodes.
摘要:
An electrostatic actuator includes a sensing means for observing a position and the distribution state of electric charges without losing any special property of the actuator, and further, can be driven effectively at a high-speed. The actuator includes a first member (5) having a plurality of bank-like driving electrodes (2); a second member (6) in contact with the first member; a controlling means (9) for moving at least one of the first and second member by switching over the applied voltages of the driving electrodes to each other; sensing electrodes (4) positioned at predetermined phase intervals and isolated from the driving electrodes (2) of the first member (5); and a means for sensing the position of the second member and the distribution state of the electric charges induced thereon by sensing the electric signals induced on the sensing electrodes (4) through the distribution of the electric charge of the second member (6).
摘要:
An electrostatic actuator comprising a first member (1) having plural strip-like electrodes (4) which are insulated from each other and arranged in a predetermined direction and at predetermined spaces, a second member (10) whose surface facing the surface of the first member is in contact with it and made of a resistive substance, and a controlling means (11) which changes the voltages applied to the respective strip-like electrodes. The controlling means applies a predetermined voltage pattern of pulse voltages to the strip-like electrodes and causes the first and second members to move relatively to each other. The resistive substance in the second member is so selected that the time constant which is determined mainly by the volume resistivity and the dielectric constant of the substance is the double of the time being necessary in order that at least one of the first and second member moves relatively by the distance equal to the length between the electrodes.