Chang, Hong Kong
Andy Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20100215106 | EFFICIENT MULTI-FRAME MOTION ESTIMATION FOR VIDEO COMPRESSION - There is disclosed a method of digital signal compression, coding and representation, and more particularly a method of video compression, coding and representation system that uses multi-frame motion estimation and includes both device and method aspects. The invention also provides a computer program product, such as a recording medium, carrying program instructions readable by a computing device to cause the computing device to carry out a method according to the invention. | 08-26-2010 |
Cherry Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20110273134 | IMPELLER DEVICE AND AUTOMATIC-SWITCHING REGENERATIVE CHARGING SYSTEM BETWEEN KINETIC ENERGY AND WIND ENERGY - An impeller device and an automatic-switching regenerative charging system between kinetic energy and wind energy are disclosed. The charging system comprises an electric generator and an impeller device in an electric green vehicle. An input end of the impeller device is connected to a differential device or an output shaft of a transmission box connected with the differential device. An output end of the impeller device is connected to an input shaft of the electric generator. The impeller device comprises at least one toothed disk with meshing teeth or at least one drive pulley. By connecting or disconnecting the impeller device and the differential device or the transmission box that link to the differential device through the one-way clutch, the kinetic energy of the electric green vehicle or the wind energy produced by the movement of the electric green vehicle can be automatically switched to charge an accumulator cell. | 11-10-2011 |
Eddie Chung Wa Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20100161878 | METHOD OF UNLOCKING PORTABLE MEMORY DEVICE - A method of unlocking usable memory space of a portable memory device, such as a flash drive, includes connecting the portable memory device to a network access device, such as a computer. The network access device executes a control program and accesses a website through the network access device by execution of the control program. A specific task is executed at the website, which sends an unlocking code upon completion of the task. The usable memory space of the portable memory device is unlocked in response to receiving the unlocking code at the network access device. | 06-24-2010 |
Hang Fung Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20130187372 | SEAT BELT BUCKLE ASSEMBLY - A buckle assembly for a seat belt system includes a belt buckle, a transmission mechanism arranged to move the belt buckle from a first position to a second position, and an electric motor for driving the transmission mechanism. The motor includes a stator and a rotor rotatably mounted to the stator. The rotor includes a motor shaft, a commutator fixed to the motor shaft, a rotor core fixed to the motor shaft and rotor windings wound about teeth of the rotor core and electrically connected to segments of the commutator. The rotor windings include a plurality of winding units. Each winding unit includes at least two coils, the coils of each winding unit being wound about the same teeth and electrically connected to a same pair of segments, in parallel. | 07-25-2013 |
20130187373 | SEAT BELT PRESENTER - A seat belt presenter for moving a tongue plate of a seat belt system to a desired position includes a transmission mechanism for moving the tongue plate and an electric motor for driving the transmission mechanism. The motor includes a stator and a rotor rotatably mounted to the stator. The rotor includes a motor shaft, a commutator fixed to the motor shaft, a rotor core fixed to the motor shaft and rotor windings wound about teeth of the rotor core and electrically connected to segments of the commutator, the rotor windings comprises a plurality of winding units. Each winding unit includes at least two coils, the coils of each winding unit being wound about the same teeth and electrically connected to a same pair of segments, in parallel. | 07-25-2013 |
20130187434 | SAFETY BELT SYSTEM AND BELT WINDER - A belt winder for a safety belt system includes a belt reel for tightening or loosing the safety belt, and an electric motor for driving the belt reel. The motor includes a stator and a rotor rotatably mounted to the stator. The rotor includes an motor shaft, a commutator fixed to the motor shaft, a rotor core fixed to the motor shaft and rotor windings wound about teeth of the rotor core and electrically connected to segments of the commutator. The rotor windings include a plurality of winding units. Each winding unit includes at least two coils, the coils of each winding unit being wound about the same teeth and electrically connected to a same pair of segments in parallel. A safety belt system incorporating the belt winder is also provided. | 07-25-2013 |
Harry Hang Fung Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20110031835 | MOTOR - An automated manual transmission comprises a hydraulic pump and a motor for driving the hydraulic pump. The motor comprises a stator and a rotor rotatably mounted to the stator, the stator comprising a housing and a motor end cap fixed to the housing, the rotor comprising a rotatable shaft rotatably supported by a bearing which is installed to the end cap. The bearing comprises an inner race, an outer race, rollers disposed between the inner race and the outer race, and roll holder for holding the rollers. A ring-shaped seal member is arranged at one axial end of the bearing to seal the gap between the inner race and outer race. The end cap is molded at outer peripheral surface of the outer race. | 02-10-2011 |
Hei Lam Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20130277413 | IMAGE-ASSISTED SYSTEM FOR ADJUSTING A BONDING TOOL - A bonding tool is adjusted to a desired operational position by viewing the bonding tool with an image-capturing device and displaying an image of the bonding tool as viewed by the image-capturing device onto a display screen. A corresponding image of a reference bonding tool showing the desired operational position of the bonding tool is superimposed onto the display screen and the position of the bonding tool is adjusted with an adjustment mechanism until the bonding tool as viewed by the image-capturing device is aligned with the superimposed image of the reference bonding tool. | 10-24-2013 |
Kin Fai Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20100112896 | Corner Booster For Toy Vehicle Track Set - A corner booster for accelerating toy vehicles includes an entrance to which a toy vehicle enters the booster, and an exit from which the toy vehicle exits the booster. The entrance and exit are orientated so that the toy vehicle turns when traveling from the entrance to the exit. The corner booster further includes a booster member for applying a force to the toy vehicle. The force applied by the booster member increases the speed of the toy vehicle as the toy vehicle travels from the entrance to the exit. The corner booster includes a cocking mechanism that cocks the booster member with preloaded mechanical energy. The preloaded mechanical energy is used to move the booster member to apply the boosting force to the toy vehicle. | 05-06-2010 |
20140274501 | TOY PROJECTILE AND METHOD OF MAKING - A toy projectile and method of making the toy projectile is provided herein. The toy projectile having: an elongated dart body secured to a tip assembly, the tip assembly comprising: a tip insert secured to a forward end of the elongated dart body and a tip secured to the tip insert, wherein the tip comprises a styrene ethylene butylene styrene copolymer (SEBS rubber) tip. | 09-18-2014 |
Kuan Yau Nancy Chang, Hong Kong HK
Patent application number | Description | Published |
---|---|---|
20130219971 | Garment Dyeing Machine - A garment dyeing machine ( | 08-29-2013 |
Kwangwu Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20110019844 | MULTI-DIRECTIONAL SOUND EMISSION SYSTEM - A multi-directional sound emission system comprises a speaker body and sound emission devices coupled to both ends of the speaker body. The sound emission devices each include a sound emission means for directionally emitting sound towards multiple directions. The sound emission means includes a plurality of hollow mechanical sound conducting elements. Each hollow mechanical sound conducting element has an inner opening end and an exterior opening end opposite to the inner opening end. The exterior opening ends of the sound conducting elements are directed towards desired multiple directions, respectively. The sound emission means is configured for receiving sound signals from the speaker body and emitting sound along the desired multiple directions through the sound conducting elements. | 01-27-2011 |
20110019853 | MULTI-DIRECTIONAL SOUND EMISSION MEANS AND MULTI-DIRECTIONAL SOUND EMISSION SYSTEM - A multi-directional sound emission means and a system having same are disclosed. The system comprises a speaker body and sound emission devices coupled to both ends of the speaker body. The sound emission devices each include a sound emission means for directionally emitting sound towards multiple directions. The sound emission means includes a base, a loudspeaker disposed on the base, and a plurality of hollow mechanical sound conducting elements. The loudspeaker has an opening where the sound is emitted. Each hollow mechanical sound conducting element has an inner opening end and an exterior opening end opposite to the inner opening end. The exterior opening ends are directed towards desired multiple directions, respectively. The inner opening ends are in sound communication with the opening of the loudspeaker such that sound from the loudspeaker is emitted along the desired multiple directions through the sound conducting elements. | 01-27-2011 |
Po Wah Chang, Hong Kong HK
Patent application number | Description | Published |
---|---|---|
20150380959 | Serial Multi-Battery Charger with Independent Simultaneous Charge and Discharge - A serial battery charger has a battery matrix with switches that are configured by a microcontroller that reads voltages between batteries to determine if each battery is fully-charged, charging, or absent. A switch configuration allows charging and discharging currents to flow simultaneously, and allows discharging current but blocks charging current from fully-charged batteries to prevent over-charging. The charging current flows through all charging batteries in series while the discharging current flows from all fully-charged and charging batteries in series. Blocking and bypass switches route the charging current to all charging batteries in series, but bypass all fully-charged and absent batteries. The blocking and bypass switches route the discharging current serially through all fully-charged and charging batteries in the battery matrix while avoiding absent batteries. The switches are controlled by the switch configuration from the microcontroller. Larger battery matrixes have row and column lines that are connected by connecting switches. | 12-31-2015 |
20150381054 | LED Driver with Small Output Ripple Without Requiring a High-Voltage Primary-Side Electrolytic Capacitor - A power converter reduces output ripple without using an electrolytic primary-side capacitor that can reduce product lifetime. Primary-Side Regulation (PSR) using an auxiliary winding provides a regulated secondary voltage with some low-frequency ripple on a secondary winding of a transformer. A smaller secondary capacitor that is not an electrolytic capacitor filters the output of the secondary side. A bang-bang controller controls the secondary side current to reduce current ripple despite voltage ripple. The bang-bang controller has a series resistor and inductor in series with a load such as an LED. A voltage drop across the series resistor increases when a switch turns on. This increasing voltage drop toggles the switch off once an upper limit voltage is reached. The voltage drop then decreases as inductor current is shunted by a diode, until the voltage drop reaches a lower limit voltage and the switch toggles on again. | 12-31-2015 |
Po Wah (patrick) Chang, Hong Kong HK
Patent application number | Description | Published |
---|---|---|
20130294118 | Output Current Estimation for an Isolated Flyback Converter With Variable Switching Frequency Control and Duty Cycle Adjustment for Both PWM and PFM Modes - A fly-back power converter has a current-estimating control loop that senses the primary output current in a transformer to control the secondary output. A primary-side control circuit switches primary current through the transformer on and off. A discharge time when a secondary current through an auxiliary winding of the transformer is flowing is generated by sampling a voltage divider on an auxiliary loop for a knee-point. A normalized duty cycle is calculated by multiplying the discharge time by a current that is proportional to the switching frequency and comparing to a sawtooth signal having the switching frequency. The peak of a primary-side voltage is sensed from the primary current loop and converted to a current and multiplied by the normalized duty cycle to generate an estimated current. An error amp compares the estimated current to a reference to adjust the oscillator frequency and peak current to control primary switching. | 11-07-2013 |
Rocky K.c. Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20130136020 | METHOD FOR MEASUREMENT OF ASYMMETRIC NETWORK CAPACITIES - Disclosed is a method for achieving efficient and accurate measurement of path capacities of a communication network. The method includes the following steps: (a) transmitting a number of probes from a local node to a remote node over a forward network path, each probe contains at least one probe packet and can elicit the remote node to transmit a number of response packets to the local node over a reverse network path; (b) determine for each response packet a minimum round-trip packet delay between the time transmitting the probe and the time receiving the response packet; (c) calculate a number of pair-wise minimum delay differences from the minimum round-trip packet delays. The number of pair-wise minimum delay differences can be used as a measurement of the forward capacity, reverse capacity, faster-path capacity, slower-path capacity and a degree of capacity asymmetry between the local node and the remote node. | 05-30-2013 |
Rocky Kow-Chuen Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20100315958 | METHOD FOR NON-COOPERATIVE MEASUREMENT OF NETWORK DATA-PATH QUALITY - A method and apparatus for measuring network path quality in a non-cooperative manner, which involves sending a probe consisting of a plurality of probe data packets to a remote node and receiving a response consisting of at least one response data packet therefrom. Both the probe and response data packets carry application messages and are exchanged according to normal transmission mechanisms, so that the method can void the reliability problem suffered by methods using non-data probes. The response data packets, at the same time, provide sufficient information for obtaining a rich set of data-path quality metrics in an efficient way. | 12-16-2010 |
20130044625 | METHOD FOR NON-COOPERATIVE MEASUREMENT OF NETWORK DATA-PATH QUALITY - A method and apparatus for measuring network path quality in a non-cooperative manner, which involves sending a probe consisting of a plurality of probe data packets to a remote node and receiving a response consisting of at least one response data packet therefrom. Both the probe and response data packets carry application messages and are exchanged according to normal transmission mechanisms, so that the method can void the reliability problem suffered by methods using non-data probes. The response data packets, at the same time, provide sufficient information for obtaining a rich set of data-path quality metrics in an efficient way. | 02-21-2013 |
Wai Kuen Chang, Hong Kong HK
Patent application number | Description | Published |
---|---|---|
20120262089 | Lighting fixture with replaceable light source - A LED illuminator includes positive and negative electrodes of different configurations and a LED lamp with a plurality of the LED illuminators. The LED lamp includes two or more elastic jacks, in each of which a positive electrode or a negative electrode is arranged. The elastic jack has a positive connection point and a negative connection point respectively corresponding to distal and proximal ends of the positive electrode or the negative electrode inserted therein so that the LED lamp is in electrical connection with a power supply unit. In addition, the LED illuminators may be in parallel connection. Accordingly, a slight touch of the LED illuminator allows the illuminator to be inserted into or removed from the respective elastic jack when replacing the LED illuminators of the lamp. | 10-18-2012 |
Youn Jung Chang, Hong Kong CN
Patent application number | Description | Published |
---|---|---|
20110061669 | Hand Rest Vacuum and Method - A hand rest vacuum and method is provided for the nail care industry. A body is configured to be supported by a desk between a client and a nail care technician. A cushioned hand rest pad is supported by the body. The body has a retractable nozzle on the technician side of the body. The nozzle is in fluid communication through an interior volume of the body to a body discharge location. Air is pulled through the nozzle opening and through the body interior volume by a vacuum source. The vacuum source may be located within the body interior volume or may be located separately from the body. The interior volume may incorporate a particulate filter, a carbon filter or a cyclone particulate matter separator. | 03-17-2011 |
20120152267 | Pedicure Slipper with Toe Separator and Method - A pedicure slipper having a toe separator is provided. The pedicure slipper features a thin sole and a fabric toe separator attached to the sole at a single location. The fabric toe separator is wrapped about each toe and about itself between the toes. A tee-shaped toe-retaining member is defined by cuts through the sole and folds to an upright position to be disposed between the big toe and second toe of the wearer. An arcuate cut through the sole defines an ankle-engaging member and folds to an upright position to retain the sole to the ankle of the wearer. | 06-21-2012 |
Zehao Chang, Hong Kong HK
Patent application number | Description | Published |
---|---|---|
20130187946 | SYSTEMS AND METHODS FOR IMAGE DATA MANAGEMENT - A system and method for image data management. A tiled representation of a data set is accessed. The tiled representation includes a plurality of high-resolution tiles and a plurality of reduced-resolution tiles. A request to access said data set from a computing device is received. An image display window is determined based on said request from the computing device, where the image display window corresponds to a displayable image for display on the display device. At least one overlapping image to send the computing device is determined based on said image display window, where the at least one overlapping image is selected from the scaled full images, the plurality of high-resolution tiles, and the plurality of reduced resolution tiles. At least a portion of the at least one overlapping image is sent to the computing device. | 07-25-2013 |
20140253587 | SYSTEMS AND METHODS FOR IMAGE DATA MANAGEMENT - A system and method for image data management. A tiled representation of a data set is accessed. The tiled representation includes a plurality of high-resolution tiles and a plurality of reduced-resolution tiles. A request to access said data set from a computing device is received. An image display window is determined based on said request from the computing device, where the image display window corresponds to a displayable image for display on the display device. At least one overlapping image to send the computing device is determined based on said image display window, where the at least one overlapping image is selected from the scaled full images, the plurality of high-resolution tiles, and the plurality of reduced resolution tiles. At least a portion of the at least one overlapping image is sent to the computing device. | 09-11-2014 |