9 results about "LED circuit" patented technology

The invention provides a manufacturing technique of a luminous LED sandwich glass capable of luminous with controlled luminous effect; a film structure of the LED sandwich glass includes a glass plate, an adhesive layer, a LED layer and a conductive coated glass plate in order. The main manufacturing steps are as follows: cleaning and drying the conductive coated glass plate, scribing a pre-designed LED circuit thereon, adhering LED and a power source lead, drying it, paving the intermediate adhesive layer, closing sheets, undergoing vacuuming and pre-pressing high pressure and temperature treatments of a high-pressure autoclave; designing various LED layout circuits on the LED luminous sandwich glass, so as to control luminous quantity, luminous effect and various luminous acts of the whole glass.

An embodiment of the present invention includes an LED driving device that causes a plurality of LEDs to emit light, wherein the device includes: an LED driving circuit configured to drive the LEDs so that at least one of the plurality of LEDs emits light as a first. LED and an LED around the first LED is prevented from emitting light as a second LED; a photodetection unit configured to detect light emission of the first LED through the second LED and detect a light emission quantity of the first LED; and a controller configured to adjust a light emission quantity of the first LED based on the light emission quantity of the light emission of the first LED detected by the photodetection unit.

The invention discloses a light emitting diode (LED) drive circuit. The LED drive circuit comprises a transformer, a metal oxide semiconductor (MOS) tube, a power adjusting resistor, a direct current buffer circuit, a rectifying circuit and a voltage control circuit. When the voltage of a control end of the voltage control circuit is higher than of the threshold voltage of the MOS tube, breakover of the MOS tube is achieved, a current input by an external power supply passes by a first winding of the transformer, the MOS tube and the power adjusting resistor sequentially, and the rectifying circuit is powered on. When the voltage of the power adjusting resistor is similar to the voltage of a standard end of the voltage control circuit, the MOS tube is cut off, a second winding of the transformer charges a capacitor of the MOS tube through the direct buffer circuit, the rectifying circuit is powered on, and the first winding of the transformer supplies power to LED load through the rectifying circuit. When the capacitor voltage of the MOS tube is higher than the threshold voltage, breakover of the MOS is achieved again. The LED drive circuit can replace a power source to manage an integrated circuit (IC), simplifies the LED drive circuit and reduces the cost.

The invention discloses a non-scan intelligent digit integrated SPR detector, composed of an optical system, a sensor chip, and a signal check circuit, wherein the optical system comprises a LED light source, a polarizing disc, a lens and a mirror, the sensor chip is a glass sheet plated with a metal film on which a ligand is grown relative to the object molecule, the sensor chip is coupled on the lens, the signal check circuit comprises a LED drive circuit, a CCD array and a relative drive circuit, a signal detect and collect circuit, an A/D convert circuit, a MCU control circuit, and a digit communication circuit. The invention holds the characters of SPR sensor technique, while the invention uses wide-angle incidence of LED light source to avoid accurate incident angle scanning device, to simplify the angle adjuster, avoid the test error caused by transmission element, and improve operation property. The inventive integrated SPR detector can directly output digit, with high intelligent degree, small volume, portable property and easy application.

The invention discloses an LED drive device with stable performance. The LED drive device comprises an input protection circuit, a step-down circuit, a rectifier and filter circuit and a voltage-dividing and current-limiting resistor, which are electrically connected, wherein the voltage-dividing and current-limiting resistor is used for carrying out current limiting on an LED light source circuit and carrying out current limiting protection on an LED, so that the LED works under the drive of stable voltage and current; and the service lifetime of the LED is ensured. A filter capacitor in the rectifier and filter circuit is a tantalum electrolytic capacitor; and the filter capacitor is relatively small in volume and stable in performance under the conditions of the same withstand voltage and electric capacity, can still keep good electrical performance after long-time working and can prolong the service lifetime of an LED drive circuit. A discharge chip resistor is arranged in the filter capacitor; and after a power supply is cut off, the chip resistor can discharge the electricity stored in a capacitor core within a short period of time, and reduces the voltage of the capacitor core to zero, so that bleeder resistors do not need to be connected with two ends of the filter capacitor in parallel; and the circuit for driving the power supply is relatively simple.

The present invention provides a line voltage compensation circuit, a controller and a LED driving circuit. The line voltage compensation circuit comprises a first switch, a second switch, a third switch and a first capacitor. A first end of the first switch is connected with a first end of a second switch, and is connected with an input end of the line voltage compensation circuit; a second end of the first switch is connected with the a first end of the first capacitor and is connected with an output end of the line voltage compensation circuit; a second end of the second switch is connectedwith a second end of the first capacitor, and is connected with a first end of the third switch; and a second end of the third switch is earthed. The line voltage compensation circuit, the controllerand the LED driving circuit are simple in structure and low in cost, can achieve high precision of line voltage compensation through changing a line voltage compensation mode, and is reliable in performance.

The invention provides an off-and-halt type LED drive circuit comprising an input rectifier circuit. The input rectifier circuit is electrically connected to an output discharge circuit; the output discharge circuit comprises a MOS Q2, a MOS Q3, a capacitor C3, a capacitor C4, a resistor R2, a resistor R3, a resistor R4 and a resistor R5; a source electrode of the MOS Q2 is electrically connected to the resistor R2; and a drain electrode of the MOS Q2 is grounded; a grid electrode of the MOS Q2 is separately electrically connected to the resistor R5 and a drain electrode of the MOS Q3; a gate electrode and a source electrode of the MOS Q3 are separately electrically connected to a positive electrode of the capacitor C4; the resistor R3 is connected in series with the resistor R4; the resistor R4 and the capacitor C4 are connected in parallel; and the capacitor C3 is connected in parallel with the resistor R3 and the resistor R4 which are in series connection. The off-and-halt type LED drive circuit of the invention has advantages of small loss, flexible control, and being capable of realizing stable and timely turn-off.

The invention discloses an LED drive circuit based on a single chip microcomputer and a replacement circuit method. The LED drive circuit comprises a power supply module, a transmitter module and a plurality of LED drive units, wherein the LED drive units are sequentially connected with one another; each LED drive unit comprises an MUC, a voltage stabilization module, a replacement circuit module and an LED branch; the MCUs of the LED drive units are sequentially connected with one another; and each MCU obtains information for controlling a corresponding LED after receiving data output by the previous MCU, and outputs the residual data to the next MCU. According to the LED drive circuit, the problem that the whole circuit cannot normally work due to the fact that one LED in a traditional tandem drive LED circuit is damaged is solved, so that the LEDs in the whole circuit can be lightened or extinguished according to the actual requirements. In addition, the problem of over-high line current in the traditional parallel drive LED circuit is solved by the drive circuit disclosed by the invention; the line current can be effectively reduced; and energy consumption is reduced.