Abstract: A self-capacitive touch sensing circuit including an operational amplifier, an internal capacitor, a first switch and a second switch is disclosed. A first input terminal and a second input terminal of operational amplifier are coupled to a capacitor and ground respectively and an output terminal of operational amplifier outputs an output voltage. The internal capacitor is coupled between the output terminal and first input terminal of operational amplifier. One terminal of first switch is coupled to a first external charging voltage and another terminal of first switch is coupled between the capacitor and the first input terminal. The first external charging voltage is higher than the second external charging voltage. The first switch and second switch are switched according to a specific order, so that the first external charging voltage or second external charging voltage will charge the capacitor.

Abstract: A mutual-capacitive touch sensing circuit includes an operational amplifier, an internal capacitor, a first switch˜a third switch. A first input terminal and a second input terminal of operational amplifier are coupled to a capacitor and ground respectively and an output terminal of operational amplifier outputs an output voltage. The internal capacitor is coupled to output terminal and first input terminal. The first switch is coupled to a first external charging voltage, capacitor and first input terminal. The second switch is coupled to a second external charging voltage and the capacitor. The third switch is coupled to a third external charging voltage, the second switch and capacitor. The second external charging voltage and third external charging voltage have same magnitude but opposite polarities. The first switch, second switch and third switch are switched in a specific order to selectively charge the capacitor with different external charging voltages.

Abstract: A self-capacitive touch sensing circuit including an operational amplifier, an internal capacitor, a first switch and a second switch is disclosed. A first input terminal and a second input terminal of operational amplifier are coupled to a capacitor and ground respectively and an output terminal of operational amplifier outputs an output voltage. The internal capacitor is coupled between the output terminal and first input terminal of operational amplifier. One terminal of first switch is coupled to a first external charging voltage and another terminal of first switch is coupled between the capacitor and the first input terminal. The first external charging voltage is higher than the second external charging voltage. The first switch and second switch are switched according to a specific order, so that the first external charging voltage or second external charging voltage will charge the capacitor.

Abstract: A mutual-capacitive touch sensing circuit includes an operational amplifier, an internal capacitor, a first switch˜a third switch. A first input terminal and a second input terminal of operational amplifier are coupled to a capacitor and ground respectively and an output terminal of operational amplifier outputs an output voltage. The internal capacitor is coupled to output terminal and first input terminal. The first switch is coupled to a first external charging voltage, capacitor and first input terminal. The second switch is coupled to a second external charging voltage and the capacitor. The third switch is coupled to a third external charging voltage, the second switch and capacitor. The second external charging voltage and third external charging voltage have same magnitude but opposite polarities. The first switch, second switch and third switch are switched in a specific order to selectively charge the capacitor with different external charging voltages.

Abstract: A touch filter circuit includes a conversion module and a space-domain filter module. The conversion module converts a plurality of analog touch data into a plurality of digital touch data. The space-domain filter module is coupled with the conversion module and receives the plurality of digital touch data, wherein the space-domain filter module generates a compensation average value according to the plurality of digital touch data and respectively generates a plurality of renewal space-domain touch data according to the plurality of digital touch data and the compensation average value.

Abstract: A linear guide assembly has a bar device, multiple partitions, multiple containing spaces and multiple rolling balls. The partitions are mounted between two bars of the bar device at intervals to form the containing spaces. The rolling balls are respectively and rotatably mounted in the containing spaces. Each partition has multiple first protrusions and multiple second protrusions. Each rolling ball is in point-contact with the first protrusions and the second protrusions of adjacent two of the partitions. With the point-contact configuration, an outer surface of each rolling ball is lubricated by much oil.

Abstract: A linear guide assembly has a bar device, multiple partitions, multiple containing spaces and multiple rolling balls. The partitions are mounted between two bars of the bar device at intervals to form the containing spaces. The rolling balls are respectively and rotatably mounted in the containing spaces. Each partition has multiple first protrusions and multiple second protrusions. Each rolling ball is in point-contact with the first protrusions and the second protrusions of adjacent two of the partitions. With the point-contact configuration, an outer surface of each rolling ball is lubricated by much oil.

Abstract: A linear motion apparatus has a linear track, a slider and two sliding-assistant units for a linear motion apparatus. The sliding-assistant units for a linear motion apparatus is mounted between the track and the slider to enhance ease of movement between the track and the slider, and each sliding-assistant unit has two roller rings to receive rollers. The roller rings are elongated rectangular rings, are selectively mounted oppositely crossly around each other. Each roller ring is designed with reduced components to make manufacturing and assembling the sliding-assistant unit easier. Moreover, the roller ring is designed as one unity so no seam will be formed due to assembling two different pieces, such that ensures contact between the rollers and the roller ring smooth.

Abstract: A linear motion apparatus has a linear track, a slider and two sliding-assistant units for a linear motion apparatus. The sliding-assistant units for a linear motion apparatus is mounted between the track and the slider to enhance ease of movement between the track and the slider, and each sliding-assistant unit has two roller rings to receive rollers. The roller rings are elongated rectangular rings, are selectively mounted oppositely crossly around each other. Each roller ring is designed with reduced components to make manufacturing and assembling the sliding-assistant unit easier. Moreover, the roller ring is designed as one unity so no seam will be formed due to assembling two different pieces, such that ensures contact between the rollers and the roller ring smooth.

Abstract: A rolling element chain is applied to retain and arrange multiple rollers at intervals in a line and has a belt assembly and multiple clamping assemblies. The rollers are cylinders mounted parallelly in the rolling element chain. The belt assembly is resilient and has two parallel bars. The clamping assemblies are formed in pairs between the parallel bars to form multiple roller holes on the belt assembly and each clamping assembly has multiple clamping protrusions. The clamping protrusions of each clamping assembly are formed in a line between the parallel bars and alternately protrude oppositely away from the belt assembly and together hold the roller in the belt assembly. Each clamping protrusion has a roller surface and at least one rib. Each rib is formed on and protrudes from the roller surface, thereby, reduces contact area between the clamping protrusions and the rollers.