Abstract: A voltage converter controller, adapted to a voltage converter circuit, includes a power switch controller and a dead-time determining circuit. The power switch controller receives a PWM signal and outputs a high-side control signal and a low-side control signal accordingly to control the conduction and cut-off of a high-side power switch and a low-side power switch respectively. When the power switch controller starts to control the low-side power switch cut-off, after a first dead-time, the power switch controller starts to control the high-side power switch conducting. The dead-time determining circuit detects a current of the low-side power switch to be larger or smaller than a threshold current when the low-side power switch is conducted, and determines the first dead-time to be a first value or a second value accordingly.

Abstract: A voltage converter controller, adapted to a voltage converter circuit, includes a power switch controller and a dead-time determining circuit. The power switch controller receives a PWM signal and outputs a high-side control signal and a low-side control signal accordingly to control the conduction and cut-off of a high-side power switch and a low-side power switch respectively. When the power switch controller starts to control the low-side power switch cut-off, after a first dead-time, the power switch controller starts to control the high-side power switch conducting. The dead-time determining circuit detects a current of the low-side power switch to be larger or smaller than a threshold current when the low-side power switch is conducted, and determines the first dead-time to be a first value or a second value accordingly.

Abstract: An antenna is provided. The antenna includes a first radiator, a second radiator, a third radiator, a ground portion and a short structure. The first radiator extends in a first direction. The second radiator extends in a second direction. The first direction is opposite to the second direction. The short structure is coupled to the ground portion. The first radiator, the second radiator and the third radiator are connected to the short structure. The short structure defines an L-shaped groove.

Abstract: A packet-based video network includes: plural packetized video data nodes; a packet switch configured to switch from one of video packet routes to another of video packet routes; and a video synchronizer configured to synchronize the video frame periods of at least nodes acting as packetized video data sources; wherein: each node acting as a packetized video data source is configured to launch onto the network packetized video data such that, for at least video frame periods adjacent to a switching operation: the node launches onto the network packetized video data required for decoding that frame during a predetermined active video data portion of the video frame period, and the node does not launch onto the network packetized video data required for decoding that frame during a predetermined remaining portion of the video frame period; and the switching operation is implemented during the predetermined remaining portion.

Abstract: An antenna is provided. The antenna includes a first radiator, a second radiator, a third radiator, a ground portion and a short structure. The first radiator extends in a first direction. The second radiator extends in a second direction. The first direction is opposite to the second direction. The short structure is coupled to the ground portion. The first radiator, the second radiator and the third radiator are connected to the short structure. The short structure defines an L-shaped groove.

Abstract: A skin care composition is described comprising water-soluble dye polymer comprising polymer backbone having negatively charged reactive dye substituent covalently bound thereto; and cosmetically acceptable carrier. The dye polymer is present in amount of 0.00001 to 0.1% in terms of reactive dye substituent by weight of the skin care composition. The composition is useful for providing cosmetic benefits such as skin lightening, evening skin tone and masking blemishes.

Abstract: Methods and genetically engineered hosts for the production of 3-carbon, 4-carbon and 5-carbon products, polymers and copolymers in methylotrophic bacteria are described herein.

Abstract: A packet-based video network including: two or more video data sources, each configured to launch video data packets onto the network as multicast data packets each associated with a multicast group identifier corresponding to that video data source; and a video data destination configured to receive and process video data from a video data source by joining a multicast group corresponding to that video data source, and execute a switching operation to switch from receiving video data from a first video data source to receiving video data from a second video data source by leaving a multicast group of the first video data source and joining a multicast group of the second video data source. The video data destination is configured to process video data corresponding to a video frame which, at end of a frame period, represents a most recently received video frame from the first video data source.

Abstract: An oral care implement, such as a toothbrush. In one embodiment, the invention can be an oral care implement comprising a handle and a head. A plurality of tooth cleaning elements may be provided on a front surface of the head. The head is formed by a plurality of spaced-apart segments formed of a rigid material. The segments are isolated from one another by channels containing an elastomeric material that flexibly connects the segments together. The oral care implement further comprises an elastomeric soft tissue cleaner located on a rear surface of the head opposite the front surface of the head. The elastomeric soft tissue cleaner comprises a plurality of grooves that are aligned with the channels.

Abstract: Provided herein are porous single-molecule trap materials with fixed pore sizes that are capable of trapping one molecule per cavity.

Abstract: A power converter control circuit includes a feedback circuit and a pulse width modulation signal generating circuit for configuring a power stage circuit to provide power to a load. The feedback circuit generates a first gain signal and a second gain signal according to an output voltage sensing signal coupled with the load. The feedback circuit further generates a feedback signal according to the first gain signal and the second gain signal. The pulse width modulation signal generating circuit configures the operation of the power stage circuit according to the feedback signal and a reference signal. Moreover, the feedback circuit and the pulse width modulation signal generating circuit are configured on the same integrated circuit package.

Abstract: A packet-based data network including: an audio/video network including a packet-switched network over which data including audio and/or video data packets can be carried; at least one data source connected to the network and operable to assemble packetized data comprising audio/video data at a first resolution and at a second resolution greater than the first resolution, and to transmit data packets carrying multiple audio/video streams at the first resolution by multicast network transmission; and at least one client connected to the network, being a data handling device for handling packetized audio/video data and being arranged to join the multicast group to receive the multiple audio/video streams at the first resolution. The client is associated with a graphical user interface configured in conjunction with a processor to select an audio/video stream.

Abstract: An oral care implement, such as a toothbrush (100), comprises a handle (110) and a head (120). A plurality of tooth cleaning elements (130) may be provided on a front surface (121) of the head (120). The head (120) is formed by a plurality of spaced-apart segments (140-145) made of a rigid material. The segments (140-145) are isolated from one another by channels (157-159B) containing an elastomeric material (146) that flexibly connects the segments (140-145) together. The oral care implement further comprises an elastomeric soft tissue cleaner (200) located on a rear surface (122) of the head (120) opposite the front surface (121) of the head (120). Each of the segments (140-145) comprises a protuberance (163-169) made of the rigid material that extends through the elastomeric soft tissue cleaner (200) and is exposed therethrough.

Abstract: An oral care implement, such as a toothbrush, comprising a flexible head formed of a plurality of flexibly connected segments. In one embodiment, the invention can be an oral care implement comprising a handle and a head. The head can be formed by a plurality of spaced-apart segments constructed of a rigid material and separated by a channel containing an elastomeric material. An elastomeric cleaning element comprising, a base portion and an upper portion extends form a front surface of the head. The elastomeric cleaning element extends from and is connected to the elastomeric material of the channel so that the base portion overlies a portion of each of the front surfaces of the segments on opposing sides of the channel. In another embodiment, the invention can be the elastomeric cleaning element itself, irrespective of the type of head in which it is incorporated. In yet another embodiment, the base portion can be tapered.

Abstract: The present invention provides a method for enhancing contrast of a color image displayed on a display system and an image processing system utilizing the same. In the present invention, the gray values of R, G, and B components of one color image are separately counted during processing the image. When calculating the corresponding output values for the gray values of R, G, and B components in each pixel, they are adapted to ratios between the gray values of R, G, and B components. Therefore, the present invention can effectively maintain the color distribution for a considerable degree and greatly enhance the image contrast.

Abstract: Provided herein are porous single-molecule trap materials with fixed pore sizes that are capable of trapping one molecule per cavity.

Abstract: An oral care implement, such as a toothbrush. In one aspect, the invention is an oral care implement comprising a handle and a head. A plurality of tooth cleaning elements may extend from a front surface of the head, which is formed by a plurality of spaced-apart segments formed of a rigid material, wherein the plurality of segments include a cruciform segment integrally formed with and extending from a distal end of the handle, a first pair of segments located on opposite sides of a longitudinal portion of the cruciform segment, and a second pair of segments located on opposite sides of the longitudinal portion of the cruciform segment, the first pair of segments located on an opposite side of a transverse portion of the cruciform segment from the second pair of segments. The segments of the first and second pairs are flexibly connected to the cruciform segment.

Abstract: A control circuit and method for a PWM voltage regulator combine a high frequency feedback technique with a constant on-time or constant off-time topology to improve the transient performance of the PWM voltage regulator. The PWM voltage regulator generates a constant on-time or constant off-time depending on a current for generating a PWM signal, and dynamically adjusts the current according to the droop-voltage at its output during a transient period. Therefore, the PWM voltage regulator boosts its transient response without any threshold for load step detection.

Abstract: The present invention provides a multi-phase switching regulator and a droop circuit for use in the multi-phase switching regulator. The multi-phase switching regulator generates pulse width modulation (PWM) signals according to an output voltage and a droop signal, to drive a plurality of switching sets to convert an input voltage to the output voltage. The droop circuit detects the sum of the currents generated by the plurality of switching sets and provides the droop signal which is related to the sum of the currents to the multi-phase switching regulator. The droop signal can be used for over current protection (OCP) or for the droop control.

Abstract: In a PWM signal generation method of a voltage regulator, an output sense signal, a first ramp signal and a second ramp signal are provided. A first time point of the first ramp signal crossing with the output sense signal is used to determine a start point of an ON-time of a PWM signal, and a second time point of the second ramp signal crossing with the output sense signal is used to determine an end point of the ON-time of the PWM signal. Moreover, the first ramp signal is reset to a reference voltage at the first time point and then maintained at the reference voltage, and further ramps down starting from the end point of the ON-time. The second ramp signal ramps up starting from the start point of the ON-time, and then is reset to a preset voltage at the second time point.