Patent application number | Description | Published |
20120217523 | LIGHT EMITTING DIODE PACKAGING STRUCTURE - A light emitting diode (LED) packaging structure comprises a base, a LED chip and a packaging colloid. The LED chip is disposed in the base. The packaging colloid comprises a first optical resin material and at least one second optical resin material. The first optical resin material is transparent and packages the LED chip. The second optical resin material is disposed to a side of the first optical resin material. The second optical resin material is doped with a second fluorescent-powder. By disposing multilayered second optical resin materials, the fluorescent-powder is far from the LED chip to prevent the fluorescent-powder from being heated to cause light attenuation, thereby extending the service life of the LED chip. | 08-30-2012 |
20130120990 | LED LIGHT BULB STRUCTURE - An LED light bulb structure includes a lamp cover and a lamp holder engaged with one another to form a light source accommodating space, and the lamp holder has a circuit board, and at least three first LEDs installed in the light source accommodating space and electrically coupled to the circuit board. Each first LED has a light source portion and a plurality of pins, and an end of the pins is coupled to the light source portion, and the other end of the pins is electrically coupled to the circuit board, and each light source portion has a lens and a chip, and the lens covers the chip, and the chip irradiates a light beam in a horizontal direction, and the first LEDs are installed sequentially next to one another, such that the light source portions are arranged into a circle to form an installation space. | 05-16-2013 |
20130141008 | LED DRIVING DEVICE AND METHOD THEREOF - An LED driving device and its method are suitable for driving and regulating an illumination brightness of at least one LED. After switching the phase angle of an alternating voltage through a regulation circuit, an integration circuit and a filter circuit are utilized to generate a stable constant voltage. Next, the magnitude of the constant voltage is regulated in stage through a driving circuit based upon a control signal of a control circuit, and the voltage is converted into a constant current for driving the LED. Accordingly, the invention utilizes the constant current with stage variation to achieve the effect of linear dimming to prevent flickering. | 06-06-2013 |
20140042922 | LIGHT EMITTING DIODE DRIVING DEVICE - A LED driving device comprises a rectification circuit, a holding current circuit and a driving circuit to drive and linearly regulates an illumination brightness of at least one LED by utilizing level variation of current magnitude. The rectification circuit rectifies and outputs a rectified voltage to the holding current circuit and the driving circuit by filtering impulses via a filter after receiving an alternating current voltage. The driving circuit outputs a driving current filtered by a filter capacitor to the LED, and the driving current is sensed by a sensing resistor to allow the holding current circuit outputttng a holding current to the rectification circuit such that the whole circuit power can be improved to reduce problems of noise interference and twinkling. | 02-13-2014 |
20140175997 | ADAPTIVE LIGHT EMITTING DIODE DIMMING DRIVING CIRCUIT - An adaptive LED dimming driving circuit is disclosed, wherein its control module is disposed with a first resistor, a second resistor, a retainer, a third resistor and a fourth resistor. When the control module receives an input voltage, the retainer is driven to output a retaining current I | 06-26-2014 |
20140320031 | VARIABLE POWER DIMMING CONTROL CIRCUIT - Disclosed is a variable power dimming control circuit for driving and linearly adjusting the illumination brightness of a plurality of light emitting diodes (LEDs), and the circuit includes a dimming stabilization unit and a control unit. The control unit is provided for detecting an input current of a circuit, and the dimming stabilization unit is driven for outputting a holding current when the input power is smaller than a standard, and stopping the output the holding current when the input power is greater than the standard. When the LEDs are dimmed to low luminance, a chip controls the operation of the dimming stabilization unit to assure the stability of the dimming operation of a TRIAC. When the LEDs are adjusted to high or full brightness, the chip stops the output of the holding current to reduce unnecessary power consumption and enhance the overall circuit performance effectively. | 10-30-2014 |
20150097489 | LED DRIVING DEVICE WITH OPEN CIRCUIT PROTECTION AND COLOR TEMPERATURE AND BRIGHTNESS ADJUSTMENT - An LED driving device with open circuit protection and color temperature and brightness adjustment is applied in a lamp to drive LEDs which are divided into strings, and at least one string is formed by connecting blue light diodes in series, and the remaining strings are formed by connecting yellow light LEDs in series, and at least one of the yellow light strings is connected to the blue light string in parallel and then connected to the remaining strings in series to form a node. The LED driving device employs a switch to conduct the blue or yellow light string to change the color temperature of the emitted light of the lamp, and a power input pin of a control chip is electrically coupled to the node. If there is an open circuit caused by an abnormality of the LEDs, the operation will be stopped to provide protection. | 04-09-2015 |
20150117007 | LED LEAD FRAME AND LAMP THEREOF - An LED lead frame mounted on a platform of a lightbulb includes a metal polarity substrate, a metal retaining substrate and a casing for partially covering the metal polarity substrate and the metal retaining substrate. The metal retaining substrate is a sheet bent into a disposing portion and a carrying portion, and an included angle θ | 04-30-2015 |