Patent application number | Description | Published |
20120139448 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller having a current limiting unit and an adjusting unit regulates a first current flowing through a load according to a load voltage. When the load voltage does not exceed a first voltage, the two-terminal current controller operates in a first mode for conducting a second current associated a rectified AC voltage, thereby limiting the first current to zero and adjusting the second current accordingly. When the load voltage is between the first voltage and a second voltage, the two-terminal current controller operates in a second mode for conducting the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the load voltage exceeds the second voltage, the two-terminal current controller operates in a third mode for turning off the current limiting unit. The adjusting unit can adjust the predetermined value and the second voltage. | 06-07-2012 |
20120262090 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller regulates a first current flowing through a load, which is coupled in parallel with the two-terminal current controller, according to a voltage established across the two-terminal current controller. When the voltage established across the two-terminal current controller does not exceed a first voltage, the two-terminal current controller conducts a second current related to a rectified AC voltage, thereby limiting the first current to zero and regulating the second current according to the load voltage. When the voltage established across the two-terminal current controller is between the first voltage and a second voltage, the two-terminal current controller conducts the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the voltage established across the two-terminal current controller is greater than second voltage, the two-terminal current controller is turned off. | 10-18-2012 |
20120300518 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller controls a first current flowing through a parallel-coupled load. During a rising period of a rectified AC voltage, when a load voltage does not exceed a first voltage, the two-terminal current controller operates in a first mode. When the load voltage exceeds the first voltage but does not exceed a second voltage, the two-terminal current controller operates in a second mode. When the load voltage exceeds the second voltage, the two-terminal current controller operates in a third mode. When the load voltage drops to a third voltage smaller than the second voltage after exceeding the second voltage, the two-terminal current controller operates in the second mode when a difference between the second and third voltages exceeds a hysteresis band and operates in the third mode when a difference between the second and third voltages does not exceed the hysteresis band. | 11-29-2012 |
20120306393 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - An LED lighting device includes a first luminescent device for providing light according to a first current, a second luminescent device coupled in series to the first luminescent device for providing light according to a second current, an impedance device for limiting the second current within a predetermined range when a voltage established across the first luminescent device and the second luminescent device exceeds a first predetermined value, and a two-terminal current controller coupled in parallel with the first luminescent device and in series to the second luminescent device and configured to regulate the second current according to a voltage established across the two-terminal current controller. | 12-06-2012 |
20130002158 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - An LED lighting device includes a first luminescent device for providing light according to a first current, a second luminescent device coupled in series to the first luminescent device for providing light according to a second current, a silicon-controlled rectifier coupled in parallel to the first luminescent device and configured to conduct a third current when a voltage established across the first luminescent device exceeds a break-over voltage, and a two-terminal current controller coupled in parallel with the first luminescent device and in series to the second luminescent device and configured to regulate the second current according to a voltage established across the two-terminal current controller. | 01-03-2013 |
20130127354 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller having a current limiting unit and an adjusting unit regulates a first current flowing through a load according to a load voltage. When the load voltage does not exceed a first voltage, the two-terminal current controller operates in a first mode for conducting a second current associated a rectified AC voltage, thereby limiting the first current to zero and adjusting the second current accordingly. When the load voltage is between the first voltage and a second voltage, the two-terminal current controller operates in a second mode for conducting the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the load voltage exceeds the second voltage, the two-terminal current controller operates in a third mode for turning off the current limiting unit. The adjusting unit can adjust the predetermined value and the second voltage. | 05-23-2013 |
20140028193 | LIGHT SOURCE DIMMING CONTROL CIRCUIT - The present invention provides a light source dimming control circuit, which includes a voltage signal generator for generating a first voltage signal between a predetermined voltage level and a ground level; a reference voltage signal generator for generating a reference voltage signal at an output end according to the first voltage signal and a second voltage signal; a first switch with a first end coupled to an output end of alight source; a first resistor with a first end coupled to a second end of the first switch, and a second end coupled to a ground end; a switch controller coupled to the first switch and the voltage signal generator for controlling on/off states of the first switch according to a sawtooth signal and the first voltage signal; and a current controller for controlling current flowing through the first resistor according to the reference voltage signal. | 01-30-2014 |
20140035471 | CURRENT DISTRIBUTOR - A current distributor includes a plurality of current adjustment units and a reference voltage adjustment unit. The plurality of current adjustment units is for distributing currents flowing through plural sets of light emitting diodes. The reference voltage adjustment unit is coupled to the plurality of current adjustment units for controlling the plurality of current adjustment units according to a reference voltage. | 02-06-2014 |
20140097754 | LIGHT EMITTING DIODE LUMINANCE SYSTEM HAVING CLAMPING DEVICE - A light emitting diode luminance system includes a first power source, a voltage divider, a first switch, a clamping device, a plurality of current sources and a feedback circuit. The voltage divider is coupled to the first voltage source. The first switch is coupled to the voltage divider and a ground. The clamping device includes a plurality of transistors each coupled to a respective set of light emitting diodes and the voltage divider. The plurality of current sources is coupled to the plurality of transistors respectively. The feedback circuit is coupled to the plurality of transistors and the plurality sets of light emitting diodes. | 04-10-2014 |
20140217908 | LIGHT-EMITTING DIODE LIGHTING DEVICE WITH ADJUSTABLE CURRENT SETTINGS AND SWITCH VOLTAGES - An LED lighting device includes a first luminescent device, a second luminescent device, a first current controller and a second current controller. The first current controller is coupled in parallel with the first luminescent device and configured to operate according to a first current setting, a switch-on voltage and a switch-off voltage. The second current controller is coupled in series to the second luminescent device and configured to operate according to a second current setting. The first current setting, the second current setting, the switch-on voltage and the switch-off voltage are adjusted by setting the mode selection pins of the first and second current controllers. | 08-07-2014 |
20140339990 | LIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES - An LED lighting device includes multiple driving stages. A first driving stage includes a first luminescent device driven by a first current and a first current controller coupled in parallel with the first luminescent device. The first current controller is configured to conduct a second current according to a voltage established across the first current controller and regulate the second current so that a sum of the first current and the second current does not exceed a first value. The second driving stage includes a second luminescent device driven by a third current and a second current controller coupled in series to the second luminescent device. The second current controller is configured to conduct a fourth current according to a voltage established across the second current controller and regulate the fourth current so that a sum of the third current and the fourth current does not exceed a second value. | 11-20-2014 |
20140354164 | LIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES - An LED lighting device includes a slave driving stage and a master driving stage. The slave driving stage includes a first luminescent device and a first current controller for providing a constant current setting in an ON phase. The master driving stage includes a second luminescent device and a current control unit having a second current controller and a current envelope controller. The second current controller provides a current envelope in the ON phase. The current envelope controller sets a level of the current envelope according to a rectified AC voltage. The driving current is regulated by the first current controller according to the constant current setting when the constant current setting is smaller than the level of the current envelope, or by the second current controller according to the current envelope when the level of the current envelope is smaller than the constant current setting. | 12-04-2014 |
20150201471 | LOW-FLICKER LIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES - An LED lighting device includes multiple luminescent devices driven by a rectified AC voltage. The multiple luminescent devices are turned on flexibly in a multi-stage driving scheme using multiple current control units. At least one charge storage unit is coupled in parallel with at least one luminescent device. When the rectified AC voltage is still insufficient to turn on the at least one luminescent device, the at least charge storage unit is configured to discharge energy to the at least one luminescent device, thereby keeping the at least one luminescent device turned on. | 07-16-2015 |
20150245442 | LOW-FLICKERLIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES - An LED lighting device includes multiple luminescent devices driven by a rectified AC voltage. The multiple luminescent devices are turned on flexibly in a multi-stage driving scheme using multiple current control units. At least one charge storage unit is coupled in parallel with at least one luminescent device. When the rectified AC voltage is still insufficient to turn on the at least one luminescent device, the at least charge storage unit is configured to discharge energy to the at least one luminescent device, thereby keeping the at least one luminescent device turned on. | 08-27-2015 |
20150257214 | LIGHT-EMITTING DIODE LIGHTING DEVICE WITH ADJUSTABLE COLOR RENDERING INDEXES - An LED lighting device includes first through third luminescent devices and first through third current controllers. The first and second luminescent devices are driven by a rectified AC voltage for providing light of a first color. The third luminescent device is driven by the rectified AC voltage for providing light of a second color different from the first color. The first through third current controllers are configured to regulate the current flowing through the first through third current controllers according to a first current setting, a second current setting and a third current setting, respectively. The color rendering index of the LED lighting device can thus be adjusted flexibly. | 09-10-2015 |
Patent application number | Description | Published |
20110254577 | Non-Reflow Probe Card Structure - In accordance with an embodiment, a probe card structure comprises a base board, a connection interposer over the base board, a substrate over the connection interposer, and a fixture over the substrate securing the substrate and the connection interposer to the base board. The connection interposer comprises interposer electrodes that provide an electrical connection between electrodes on the base board and first electrodes on the substrate. | 10-20-2011 |
20120169367 | HIGH FREQUENCY PROBING STRUCTURE - The present disclosure provide a probe card for wafer level testing. The probe card includes a space transformer having a power line, a ground line, and signal lines embedded therein, wherein the space transformer includes various conductive lines having a first pitch on a first surface and a second pitch on a second surface, the second pitch being substantially less than the first pitch; a printed circuit board configured approximate the first surface of the space transformer; and a power plane disposed on the first surface of the space transformer and patterned to couple the power line and the ground line of the space transformer to the printed circuit board. | 07-05-2012 |
20120194210 | PROBE CARD WIRING STRUCTURE - The present disclosure provides a probe card for wafer level testing. The probe card includes a space transformer having first power/ground lines and first signal lines embedded therein, wherein the first power/ground and signal lines are configured to have a first wiring pitch on a first surface and a second wiring pitch on a second surface, the second wiring pitch being substantially less than the first wiring pitch; a printed circuit board bonded to the first surface of the space transformer, wherein the printed circuit board includes second power/ground lines and second signal lines embedded in the printed circuit board and coupled to the first power/ground and signal lines; and conductive lines configured to a surface of the printed circuit board remote to the first surface of the space transformer, wherein each of the conductive lines includes a first end coupled to one of the second signal lines and a second end coupled to a different location of the printed circuit board. | 08-02-2012 |
20120319711 | Probe Head Formation Methods Employing Guide Plate Raising Assembly Mechanism - An assembly includes a lower guide plate having a first plurality of through-holes therein, and an upper guide plate over the lower guide plate. The upper guide plate includes a second plurality of through-holes therein. The assembly further includes a plurality of probe pins. Each of the probe pins is inserted through one of the first plurality of through-holes and one of the second plurality of through-holes. The assembly further includes a plurality of probe pin stoppers, each attached to one of the probe pins, wherein the plurality of probe pin stoppers has lateral sizes greater than lateral sizes of the second plurality of through-holes. The plurality of probe pin stoppers is located over the upper guide plate. | 12-20-2012 |
20130002282 | Test Structures and Testing Methods for Semiconductor Devices - Test structures, methods of manufacturing thereof, and testing methods for semiconductors are disclosed. In one embodiment, a test structure for semiconductor devices includes a printed circuit board (PCB), a probe region, and a compliance mechanism disposed between the PCB and the probe region. A plurality of wires is coupled between the PCB and the probe region. End portions of the plurality of wires proximate the probe region are an integral part of the probe region. | 01-03-2013 |
20130069683 | TEST PROBE CARD - A testing probe card for wafer level testing semiconductor IC packaged devices. The card includes a circuit board including testing circuitry and a testing probe head. The probe head includes a probe array having a plurality of metallic testing probes attached to a substrate including a plurality of conductive vias. In one embodiment, the probes have a relatively rigid construction and have one end that may be electrically coupled to the vias using a flip chip assembly solder reflow process. In one embodiment, the probes may be formed from a monolithic block of conductive material using reverse wire electric discharge machining | 03-21-2013 |
20130293253 | Contactless Wafer Probing with Improved Power Supply - Some embodiments relate to an integrated circuit. The integrated circuit includes an inductive or capacitive wireless communication structure located on a die region of the integrated circuit. This wireless communication structure is configured to wirelessly receive a test stimulus vector to test circuitry on the die region. The integrated circuit also includes a landing region having a size and location suitable to allow a conductive needle or conductive probe to come into direct physical and electrical contact with the landing region. The landing region provides a DC power supply to the circuitry on the die region while the test stimulus vector is wirelessly received. | 11-07-2013 |
20140028338 | SHIELD PIN ARRANGEMENT - Among other things, one or more techniques and/or systems are provided for shielding a signal pin. A signal pin, such as a signal pin within a probe card used to test electronic devices, such as integrated circuits, is shielded from interference signals, which are emitted from other signal pins within the probe card. Shielding the signal pin mitigates cross-talk issues and/or impendence control issues associated with signals that are carried by the signal pin. In one example, one or more shield pins are arranged with respect to the signal pin according to a shield configuration. For example, the shield configuration comprises a plane of signal pins, a substantially regular layout of signal pins, or a polygonal layout of signal pins, etc. In this way, one or more shield pins inhibit unintended interactions or effects that otherwise occur among two or more signal pins. | 01-30-2014 |
20140347085 | TEST PROBE CARD - A testing probe card for wafer level testing semiconductor IC packaged devices. The card includes a circuit board including testing circuitry and a testing probe head. The probe head includes a probe array having a plurality of metallic testing probes attached to a substrate including a plurality of conductive vias. In one embodiment, the probes have a relatively rigid construction and have one end that may be electrically coupled to the vias using a flip chip assembly solder reflow process. In one embodiment, the probes may be formed from a monolithic block of conductive material using reverse wire electric discharge machining. | 11-27-2014 |
20150048861 | HIGH FREQUENCY PROBING STRUCTURE - A probe card for wafer level test includes a space transformer having a power line, a ground line, and signal lines embedded therein, wherein the space transformer includes a first surface having a first pitch and a second surface having a second pitch substantially less than the first pitch, a printed circuit board configured approximate the first surface of the space transformer, a first power plane disposed on the first surface of the space transformer and patterned to couple the power line and the ground line to the printed circuit board, and a second power plane disposed on a surface of the printed circuit board and patterned to couple the power line and the ground line of the space transformer to the printed circuit board, wherein the second power plane is in electrical connection with the first power plane. | 02-19-2015 |