Abstract: An electric motor with double stators includes a first stator, a first stator and a rotor assembly. The rotor assembly is located between the first stator and the second stator in a radial direction. The rotor assembly includes a rotor body, a plurality of first rotor slots, a plurality of second rotor slots, a plurality of first magnets, and a plurality of second magnets. A first air gap is formed between the rotor body and the first stator, and a second air gap is formed between the rotor body and the second stator. The material of the first magnets is different to the material of the second magnets, and any position of the first magnets is different to any position of the second magnets.

Abstract: A motor parameter estimation method includes obtaining an operation signal of a motor, wherein the operation signal includes an encoder signal, a phase current and a driving voltage, obtaining a number of poles according to the encoder signal and the phase current, performing a simulation procedure according to the driving voltage, the number of poles and an initial random parameter set, wherein the simulation procedure is calculating a simulation response current, calculating an error value between the simulation response current and the phase current, determining whether the error value falls into a threshold range, if the error value falls outside of the threshold range, performing the simulation procedure according to the driving voltage, the number of poles and an update random parameter set, and if the error value falls into of the threshold range, outputting the number of poles and the initial random parameter set.

Abstract: An example micro light-emitting diode (LED) control device includes a substrate, a motor operatively connected to the substrate, a support stand connected to the motor, a support plate on the support stand, and a micro LED on the support plate, wherein the motor is set to rotate the support stand. The motor may rotate the support stand approximately 45° in each lateral direction with respect to a two-dimensional rotation plane. The support stand may include a sub-pixel driving circuit.

Abstract: In some examples, a micro light-emitting diode (?LED) panel may include a ?LED including at least two electrodes (or bond pads), and a ferromagnetic material included in the at least two electrodes (or bond pads) and/or disposed on the at least two electrodes (or bond pads). The ?LED panel may further include a panel substrate including ferromagnetic material selectively disposed at least at two locations corresponding to locations of the at least two electrodes (or bond pads) to align a plurality of ?LEDs including the ?LED onto the panel substrate.

Abstract: A micro-structure transfer system may include a printhead and a pressure control device to control a pressure of fluid coupled with the printhead. The pressure control device forms a meniscus of fluid at a number of nozzles defined within the printhead to pick up a number of micro-structures. A printhead for transferring micro-structures includes a number of fluid chambers, a number of nozzles defined in an orifice plate through which fluid may exit the chambers, and a pressure control device to control a pressure of fluid within each of the chambers. The pressure control device forms a meniscus of the fluid at a number of nozzles defined within the printhead to pick up a number of micro-structures.

Abstract: A micro light-emitting diode (LED) display assembly includes a backplane, a passivation layer on the backplane, a micro LED on the passivation layer, and a non-transparent metal housing on the passivation layer. The housing includes a base portion on the passivation layer, a sidewall portion upwardly extending from the base portion, a cap portion connected at a top of the sidewall portion, an orifice in the cap portion, and a notch in the cap portion and adjacent to the orifice. The assembly also includes a translucent filter positioned in the notch and covering the orifice, and a pocket defined by an enclosed area in between the sidewall portion, the cap portion, the filter, and the passivation layer. The micro LED is encased within the pocket such that light transmitted from the micro LED directly hits and passes through the filter.

Abstract: A display may include a substrate, an array of thin film transistors, an array of micro-light-emitting diode elements supported by the substrate and an array of sensing elements supported by the substrate. Each sensing element may include a continuous conductive layer functioning as part of the sensing element and extending along the substrate as an electrically conductive trace connected to one of the thin film transistors.

Abstract: A stamp for picking and placing multiple components in fixed separations to each other includes: a silicon substrate with a plurality of etched pits, wherein the etched pits correspond to a size and geometry of the components and a metal layer covering an inner surface of the plurality of etched pits.

Abstract: A micro light-emitting diode (LED) display assembly includes a backplane, a passivation layer on the backplane, a micro LED on the passivation layer, and a non-transparent metal housing on the passivation layer, wherein the housing includes a base portion on the passivation layer, a sidewall portion upwardly extending from the base portion, a cap portion connected at a top of the sidewall portion, an orifice in the cap portion, and a notch in the cap portion and adjacent to the orifice. The assembly also includes a translucent filter positioned in the notch and covering the orifice, and a pocket defined by an enclosed area in between the sidewall portion, the cap portion, the filter, and the passivation layer, wherein the micro LED is encased within the pocket such that light transmitted from the micro LED directly hits and passes through the filter.

Abstract: A micro-structure transfer system may include a printhead and a pressure control device to control a pressure of fluid coupled with the printhead. The pressure control device forms a meniscus of fluid at a number of nozzles defined within the printhead to pick up a number of micro-structures. A printhead for transferring micro-structures includes a number of fluid chambers, a number of nozzles defined in an orifice plate through which fluid may exit the chambers, and a pressure control device to control a pressure of fluid within each of the chambers. The pressure control device forms a meniscus of the fluid at a number of nozzles defined within the printhead to pick up a number of micro-structures.

Abstract: An electric generating device includes a motor having a rotary member, an electric generating mechanism having an engaging member, and a transmission device includes a primary gearing mechanism having a follower attached to a primary shaft and engaged with the rotary member of the motor, and another follower engaged with the engaging member of the electric generating mechanism for allowing the engaging member of the electric generating mechanism to be driven by the motor, and a secondary gearing mechanism includes another follower attached to a secondary shaft and engaged with the primary gearing mechanism for being driven by the primary gearing mechanism.

Abstract: An electric generating device includes a motor having a rotary member, an electric generating mechanism having an engaging member, and a transmission device includes a primary gearing mechanism having a follower attached to a primary shaft and engaged with the rotary member of the motor, and another follower engaged with the engaging member of the electric generating mechanism for allowing the engaging member of the electric generating mechanism to be driven by the motor, and a secondary gearing mechanism includes another follower attached to a secondary shaft and engaged with the primary gearing mechanism for being driven by the primary gearing mechanism.

Abstract: A low speed control method and an apparatus for a servo motor. The control apparatus comprises: an encoder capable of acquiring a speed signal from a servo motor and encoding the speed signal to output a low-resolution encoded signal; an insertion calculation unit capable of receiving the low-resolution encoded signal from the encoder to be processed by an interpolation operation for converting the low-resolution encoded signal into a high-resolution encoded signal to be outputted therefrom; a servo control chip capable of setting internal parameters and receiving the high-resolution encoded signal from the insertion calculation unit to be processed by a calculation process so as to output a switch control instruction; and a power module capable of receiving the switch control instruction from the servo control chip and then transmitting the same to the servo motor for adjusting the operation speed of the servo motor.

Abstract: A low speed control method and an apparatus for a servo motor. The control apparatus comprises: an encoder capable of acquiring a speed signal from a servo motor and encoding the speed signal to output a low-resolution encoded signal; an insertion calculation unit capable of receiving the low-resolution encoded signal from the encoder to be processed by an interpolation operation for converting the low-resolution encoded signal into a high-resolution encoded signal to be outputted therefrom; a servo control chip capable of setting internal parameters and receiving the high-resolution encoded signal from the insertion calculation unit to be processed by a calculation process so as to output a switch control instruction; and a power module capable of receiving the switch control instruction from the servo control chip and then transmitting the same to the servo motor for adjusting the operation speed of the servo motor.