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Ching-Chi Cheng
Ching-Chi Cheng, Hsintien TW
| Patent application number | Description | Published |
|---|---|---|
| 20110031955 | CONSTANT CURRENT DEVICE - A constant current device in accordance with the present invention is connected to an external voltage source and comprises an input unit, a driving transistor and a voltage control unit. The input unit is connected to the external voltage source. The driving transistor is used to output constant current. The voltage control unit makes the driving output constant current and comprises at least one resistor and a semiconductor load, and has a resistor voltage, the resistor comprising an input and an output. | 02-10-2011 |
Ching-Chi Cheng, Taipei Hsien TW
| Patent application number | Description | Published |
|---|---|---|
| 20100295458 | AC LED MODULE WITH AN IMPROVED POWER FACTOR - An AC LED module with an improved power factor for coupling with an AC source includes a plurality of LED strings and a plurality of connecting-to-middle drive elements. The LED strings are coupled in parallel between two ends of the AC source, and each of the LED strings further includes a respective number of LEDs connected in series. The connecting-to-middle drive element assigned to a respective LED string has two connection point, one connected to one end of the AC source while another being connected with a middle point between two consecutive LEDs in the same LED string. | 11-25-2010 |
| 20100308352 | CARRIER STRUCTURE FOR MOUNTING LED CHIPS - A carrier structure for mounting at least an LED chip includes at least a lead and a base. The LED chip housed inside the base is coupled parallel with an electronic element. The lead is connected electrically to the LED chip at one end, while another end is exposed to the atmosphere. The base encaving the lead further has a shallow accommodation room to mount the electronic element at a surface not the same with the surface that mounts the LED chip. | 12-09-2010 |
Ching-Chi Cheng, Taipei TW
| Patent application number | Description | Published |
|---|---|---|
| 20100259188 | AC LED MODULE WITH A CURRENT REGULATIVE DIODE - An AC LED module includes a substrate, a bridge rectifier unit a constant current unit and an LED chip set. The bridge rectifier unit mounted on the substrate further includes an output and an input coupled with an AC source. The constant current unit, mounted on the substrate and coupled with the output of the bridge rectifier unit, further includes at least one current regulative diode. The LED chip set mounted also on the substrate is electrically coupled with the constant current unit. | 10-14-2010 |
Ching-Chi Cheng, Hsinchu TW
| Patent application number | Description | Published |
|---|---|---|
| 20090261375 | PACKAGE-BASE STRUCTURE OF LUMINESCENT DIODE AND FABRICATING PROCESS THEREOF - A package-base structure of a luminescent diode and its fabricating process. The package-base structure includes a substrate having thereon a holding space; an insulating layer extending from a bottom surface of the holding space to the bottom of the substrate; an through hole defined in the insulating layer; and a conductive layer disposed over the insulating layer. The insulating layer decouples the current flow and heat flow to increase the lifetime of the package-base structure together with the luminescent diode. In the fabricating process, the insulating layer is formed by anodic etching to allow the insulating layer have a porous structure. | 10-22-2009 |
Ching-Chi Cheng, Taoyuan Hsien TW
| Patent application number | Description | Published |
|---|---|---|
| 20090152569 | LED MODULE WITH REDUCED OPERATING TEMPERATURE - The present invention relates to a LED module with a reduced operating temperature. The LED module includes a substrate, a plurality of LED chips, a carrier and an encapsulant layer. These LED chips are disposed on the substrate and electrically connected to the substrate and are divided into a first LED chip set and a second LED chip set. The carrier is coupled to the substrate and has a driving circuit. The driving circuit is electrically connected to the plurality of LED chips for driving operations of the plurality of LED chips. The first LED chip set and the second LED chip set emit light in an alternate lighting manner or in a combined simultaneous/alternate lighting manner so as to reduce the operating temperature of the LED module. The encapsulant layer covers the plurality of LED chips, the substrate and the carrier having the driving circuit. | 06-18-2009 |
| 20090153076 | DRIVING CIRCUIT AND METHOD FOR REDUCING OPERATING TEMPERATURE OF LED PACKAGE - The present invention relates to a driving circuit for driving one or multiple LED chip sets. The driving circuit includes a power converting circuit, one or multiple switching elements, and a controller. The power converting circuit is electrically connected to the one or multiple LED chip sets for receiving an input power and converting the input power into a regulated output voltage or current required for illuminating the one or multiple LED chip sets. The one or multiple switching elements electrically connected to the one or multiple LED chip sets. The controller is electrically connected to the switching elements for controlling alternate or combined simultaneous/alternate switching on/off statuses of the one or multiple switching elements, so that the one or multiple LED chip sets emit light in an alternate lighting manner or a combined simultaneous/alternate lighting manner to reduce the operating temperatures of the one or multiple LED chip sets. | 06-18-2009 |
| 20090195169 | POWER SUPPLY CIRCUIT WITH CURRENT SHARING FOR DRIVING MULTIPLE SETS OF DC LOADS - The present invention provides a power supply circuit for driving multiple sets of DC loads. The power supply circuit includes a current providing circuit, a sharing circuit and a current control unit. The current providing circuit receives and regulates a supply voltage into specified output currents to be supplied to the multiple sets of DC loads. The sharing circuit is connected in series with output terminals of the current providing circuit and the multiple sets of DC loads. The sharing circuit includes at least one coupling inductor member for performing equal current sharing among the multiple sets of DC loads. The current control unit is connected to the current providing circuit and the multiple sets of DC loads for detecting magnitudes of the current passing through the multiple sets of DC loads and controlling the output currents from the current providing circuit. | 08-06-2009 |