Sichuan Sunfor Light Co.

Chengdu, China

Sichuan Sunfor Light Co.

Chengdu, China
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Patent
Sichuan Sunfor Light Co., University of Electronic Science and Technology of China | Date: 2016-06-01

An LED lighting drive circuit supplying power for N groups of LED loads, the drive circuit comprising N current paths, N groups of LEDs, and a constant current section (600); the N current paths comprise: a voltage dividing section (100) connected to a half sine wave power supply, and used to reduce a supply voltage to a voltage usable by the corresponding current paths; a comparator section (200) comprising N comparators used to output a corresponding control signal when the voltage changes; a logic control section (300) used to respectively output N enabling signals according to the control signal outputted by the comparator section (200); a power drive section (400) used to provide N voltages according to the N enabling signals; a switch section (500) used to switch off or on according to the N voltages provided by the power drive section (400) so as to control the power-on or power-off of the N groups of LEDs; and the logic control section (300) enables, via logic control, the switch section (500) of the N current paths to sequentially switch on and off. The LED lighting drive circuit enables the current of LED lamps to change in a sinusoidal half-wave form with the utility AC input, and keeps the current a constant effective value.


Patent
Sichuan Sunfor Light Co. | Date: 2015-12-03

Disclosed is an alternating current dimming drive circuit for an LED, comprising a rectification unit and N stages of LED direct current drive circuits. In the i^(th )stage of LED direct current drive circuit, a first end of the i^(th )voltage sampling unit and an input end of the i^(th )LED light source module directly or indirectly receive the output voltage of the rectification unit; a voltage division end of the i^(th )voltage sampling unit is connected to a second input end of the i^(th )switch unit; and a first input end of the i^(th )switch unit is connected to an output end of the i^(th )LED light source module, and an output end of the i^(th )switch unit, a second end of the i^(th )voltage sampling unit and a second output end of the rectification unit are grounded. When the i^(th )switch unit is switched on, the first to the i^(th )LED light source modules emit light. When the i^(th )switch unit is switched off, if i is less than N, the first to the (i+1)^(th )LED light source modules emit light, and if i is equal to N, the first to the N^(th )LED light source modules stop emitting light. The present invention realizes an alternating current directly-driven LED light source module and will not flicker in the case of alternating current voltage fluctuation.


Patent
Sichuan Sunfor Light Co. | Date: 2016-04-20

An ultrathin LED light engine (100) comprises a protective cover (106), a driving circuit board (101), an aluminum substrate (103) and at least one LED module (104). A double-sided high-viscosity heat conducting plate (102) covers the first surface of the aluminum substrate (103) to fix the driving circuit board (101); the at least one LED module (104) is fixed on the first surface and insulated from the aluminum substrate (103) by means of an insulating layer (200) on the first surface; a conductive circuit for electrically connecting the at least one LED module (104) and the driving circuit board (101) is arranged on the insulating layer (200); and the size of the aluminum substrate (103) at least at the local peripheral outer area is greater than that of the driving circuit board (101), so that the double-sided high-viscosity heat conducting plate (102) on the first surface at least locally fixes the protective cover (106). The LED light engine (100) realizes ultrathin design and built-in integration of drive and control devices, and realizes heat conduction and fixation of the PCB and the protective cover by using a double-sided high-viscosity film.


The present invention relates to an oxynitride luminescent material, a preparation method, and an LED light source manufactured thereby. Chemical compositions of the luminescent material are M1 a M2 b Si c O d N e:xEu 2+, M1 being one or two or a combination of more than two of elements: Mg, Ca, Sr, Ba, and Zn; M2 being one or a combination of two of elements: Tb and Tm; a, b, c, d, e and x being molar coefficients of atoms, and 1a4, 0.001b0.6, 0.8c1.2, 0d6, 0


Disclosed are an alternating current rectifying circuit and an alternating current rectifying method for driving an LED module. By using the present invention, stability of an output voltage can be improved, and luminous efficiency of the LED module can be improved.


An LED light source performance compensation apparatus and a white-light LED light-emitting device. The LED light source performance compensation apparatus comprises: a light transmissive supporting member (101), wherein the light transmissive supporting member (101) is provided with a light performance parameter regulation member (102); and after secondary light of which the wavelength is 380 nm - 780 nm and which is emitted by an LED light source (103) passes through the performance compensation apparatus, light performance parameters are adjusted. The LED light source performance compensation apparatus can effectively regulate the light performance parameters of the LED light source, thereby remedying the defects of the secondary light emitted by an existing finished LED light source in terms of light performance parameters.


Patent
Sichuan Sunfor Light Co. | Date: 2016-07-20

An LED AC drive circuit, comprising: a rectification unit, a current-limiting unit, M LED units and M-1 connected/disconnected control connection lines; each LED unit comprising ni LEDs connected in series, wherein 1iM, and n1+n2+...+nM=N, 1MN, and N is determined by formula (I). The M LED units are connected sequentially to the positive end of the rectification unit and to the current-limiting unit connected to the negative end of the rectification unit; the first LED unit comprises switches connected in series at the negative end of the LED string; the ith LED unit comprises switches connected in series at the positive end of the LED string and switches connected in series at the negative end of the LED string, wherein 1iM-1; and the Mth LED unit comprises switches connected in series at the positive end of the LED string. The serial or parallel connection state of each LED unit is changed by changing the on/off state of each switch and the connected/disconnected state of the control connection lines, allowing all LEDs to work normally within each voltage range of the pulsating direct current.


A method for improving optical performance of an LED light source, a light conversion filter obtained by using the method, and the corresponding LED light source. In the method, an LED chip is packaged by using a light wavelength conversion component, and the light wavelength conversion component is at least provided with two types of light conversion filters with light excitation performance. With the excitation of light rays that are sent by the LED chip and have wavelengths in an ascending order, sent light rays show an opposite change tendency in light intensities of light rays after the light rays are converted by the two types of light conversion filters. The method can reduce the discrete degree of chroma distribution of light transmitted by the LED light source, and improve the defect-free rate of the LED light source.


Patent
Sichuan Sunfor Light Co. | Date: 2016-10-05

The present invention relates to a card type LED driver and transportation means with the card type driver, characterized in that the card type LED driver includes an installation card tray and a replaceable driving circuit board, the installation card tray being secured to an LED module or an LED lamp with the LED module so as to drive and/or control the LED module through an electrical interface in the installation card tray; the replaceable driving circuit board has at least one AC directly driven LED driving unit, the replaceable driving circuit board being pluggably secured to the installation card tray, thus making possible selectively installing a corresponding replaceable driving circuit board according to lighting scenario requirements, dimming requirements, and electrical characteristics of the LED module.


Patent
Sichuan Sunfor Light Co. | Date: 2016-03-24

The present invention provides a light-emitting diode (LED) device and a method for manufacturing the same. The LED device comprises: a substrate (1); a chip (2) disposed on the substrate (1); and a first lens (3) disposed on the substrate (1) and spaced from the chip (2); wherein the first lens (3) comprises luminescent powder (7) and at least one of light-diffusing particles (8) and light-reflecting particles (10). The LED device provided by the present invention has a high luminous efficiency, and solves the problem in the prior art that the LED device has a small angle of emergence and the emergent light emergence lacks of uniformity.

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