Abstract: A ball screw is formed of a screw rod, two screw nuts, a link, a plurality of balls, and at least two parallelism sensors. The screw nuts are sleeved onto the screw rod and are connected with each other via a link to define a spiral path therebetween. The spiral path is linked with an internal circulatory passage of each screw nut for receiving a plurality of balls. The two parallelism sensors are oppositely mounted between the two screw nuts and surround the screw rod for sensing the preload between the two screw nuts to figure out whether the parallelism of the screw rod after the assembly is deviated or not. In this way, monitoring the voltage value outputted from the parallelism sensors can monitor the parallelism of the screw rod in real time after the assembly.

Abstract: A band saw machine includes a working bench, a driving wheel mounted to the working bench, a driven wheel mounted to the working bench, and a band saw running on the driving and driven wheels. A storage member and a hydraulic cylinder connected with the storage member are mounted to the working bench. The hydraulic cylinder includes a piston rod for pushing against the driven wheel to make the driven wheel tighten the band saw while moving relative to the driving wheel. A force sensor is mounted between the piston rod and the driven wheel for sensing the tension of the band saw and emitting a sensing signal to a control system. In this way, the control system can receive the sensing signal and controllably making the storage member supply oil to the cylinder body according to the sensing signal to force the piston rod to elongate.

Abstract: A ball screw capable of sensing a preload is formed of a nut having an internal thread surrounding an imaginary central axis, a screw inserted into the nut and having an external thread surrounding the imaginary central axis, and a plurality of balls are mounted between the internal and external threads in a way that the balls roll therebetween. A mounting hole having a mounting surface therein is formed in the nut. The mounting surface corresponds to the internal thread in a way that it is substantially perpendicular to the imaginary central axis. A force sensor is mounted to the mounting surface. The force sensor can directly sense the preload in real time, so it is uneasily adversely affected by any environmental factor to have more accurate sensing result relatively.

Abstract: A band saw machine includes a chassis, a motor mounted to chassis, a driving wheel mounted to the chassis and connected with the motor, a driven wheel mounted to the chassis, a band saw running on the driving and driven wheels, a band-saw regulator mounted to the chassis and located between the driving and driven wheels, and a force sensor mounted inside the band-saw regulator for sensing how much a force is applied to the band-saw regulator in the process of cutting and for emitting a sensing signal to a control system. In this way, the control system can control the rotational speed of the motor according to the sensing signal received from the force sensor to automatically regulate the cutting speed.

Abstract: A band-saw cleaning mechanism includes a cleaning unit having a steel brush, a first motor having a driving shaft, and a linking rod connected between the steel brush the driving shaft; a torque sensor mounted to the driving shaft for sensing the torque of the driving shaft and for emitting a sensing signal; a regulation unit having a second motor and a regulation screw having two ends connected with the second motor and the linking rod, respectively; and the control unit connected with the torque sensor and the second motor for controllably making the second motor regulate the regulation screw for prolongation according to the sensing signal. While the regulation screw is prolonged, the linking rod can be pushed to change the contact distance between the steel brush and the band saw for proper contact therebetween.

Abstract: A ball screw includes a screw rod having an external thread; two screw nuts having an internal thread and a circulatory passage each, a spiral path being formed between the internal threads and the external thread and communicating with the circulatory passage, each of the two screw nuts having a keyway located on respective toric surfaces of opposite ends of the two screw nuts, the two keyways facing each other; a link mounted inside the two keyways to traverse the two screw nuts; a force sensor mounted between and squeezed by opposite sides of the two screw nuts; and a plurality of balls located inside the spiral path or the circulatory passage and keeping rolling while moving.

Abstract: A ball screw assembly based on heat-pipe thermal dissipation is composed of a ball screw and at least one heat pipe. The ball screw includes a threaded shaft, a nut, and a plurality of balls mounted between the threaded shaft and the nut. The at least one heat pipe defines a main body and an extended part. The main body is mounted to the ball screw. The extended part extends outwardly for a predetermined length from the ball screw for thermal dissipation or connection with a heat-dissipating device.

Abstract: The present invention provides a method for modulating backlight sources for flat panel displays (FPD), which comprises: lowing steps: step 31: turning on a display screen; step 32: identifying whether the total number of the BLS groups provided on the backlight module is an odd number or an even number; step 33: turning on the one BLS group located at the center-most region of the backlight module while the total number of the BLS groups is an odd number; step 34: turning on one of the two BLS groups located at the center-most region of the screen while the total number of the BLS groups is an even number; step 35: turning on another one of the two center-most BLS groups while turning off the previous turned-on center-most BLS group, and then turning on a BLS group located at the outer side of the turned-off center-most BLS group while turning off another turned-on center-most BLS group, and similarly, by iteratively progressing the turning-on and the turning-off from the center region to the two outer edge

Abstract: The present invention provides a method for modulating backlight sources for flat panel displays (FPD), which comprises: lowing steps: step 31: turning on a display screen; step 32: identifying whether the total number of the BLS groups provided on the backlight module is an odd number or an even number; step 33: turning on the one BLS group located at the center-most region of the backlight module while the total number of the BLS groups is an odd number; step 34: turning on one of the two BLS groups located at the center-most region of the screen while the total number of the BLS groups is an even number; step 35: turning on another one of the two center-most BLS groups while turning off the previous turned-on center-most BLS group, and then turning on a BLS group located at the outer side of the turned-off center-most BLS group while turning off another turned-on center-most BLS group, and similarly, by iteratively progressing the turning-on and the turning-off from the center region to the two outer edge

Abstract: A method for resolving display nonuniformity is disclosed. The method comprises the steps of: (a1) turning on a display screen; (a2) dividing the display screen into a plurality of areas; (a3) using the center line as a baseline in each area for separating the pixel capacitors of each area into left pixel capacitors and right pixel capacitors, and turning on the pixel capacitor arranged at the center line; (a4) turning on a left pixel capacitor arranged most adjacent to the center line after the pixel capacitor at the center line is turned on; (a5) turning on a right pixel capacitor arranged most adjacent to the center line after the pixel capacitor at the near-most left side of the center line is turned on; and (a6) turning on a left pixel capacitor just next to the previous turned-on left pixel capacitor and then turning on a right pixel just next to the previous turned-on right capacitor, and so on, i.e.