Unlock instant, AI-driven research and patent intelligence for your innovation.

Driving circuit and related driving method for providing feedback control and open-circuit protection

A technology of a driving circuit and a driving method, which is applied to emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., and can solve problems such as damage to drive circuit components

Active Publication Date: 2008-06-25
IML HONG KONG LTD
View PDF0 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Assuming that the driving voltage VDD is greater than the maximum voltage that the driving circuit 200 can bear, at this time, the entire driving circuit or its internal components may be damaged accordingly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Driving circuit and related driving method for providing feedback control and open-circuit protection
  • Driving circuit and related driving method for providing feedback control and open-circuit protection
  • Driving circuit and related driving method for providing feedback control and open-circuit protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a driving circuit 300 providing feedback control and open circuit protection according to a first embodiment of the present invention. The drive circuit 300 includes a voltage conversion circuit 310, at least one light emitting device 321-326 (in this embodiment, represented by six light emitting devices 321-326), at least a certain current supplier 331-336 (in this embodiment Among them, six constant current suppliers 331-336 are used to represent and illustrate), a selection circuit 350, an analysis and judgment circuit 360, and at least one switch SW1-SW6 (in this embodiment, six switches SW1-SW6 are used to represent representative instructions). The voltage conversion circuit 310 has a first input terminal 312 for receiving an input voltage VIN, a second input terminal 314 for receiving a feedback signal FB, and an output terminal 316 coupled to six light emitting devices 321-326. The voltage conversion cir...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A driving circuit capable of providing feedback control and open-circuit protection and its related driving method. The drive circuit includes at least one light emitting device, a voltage conversion circuit, an analysis and judgment circuit and a selection circuit. The voltage conversion circuit is coupled to the light emitting device and used for providing a driving voltage to drive the light emitting device. The analyzing and judging circuit is coupled to the light emitting device, and is used for judging whether the light emitting device is open circuit to generate a judgment result. The selection circuit is coupled between the analysis and judgment circuit and the voltage conversion circuit. According to the judgment result, the maximum forward bias voltage corresponding to the light-emitting device is selected to generate a feedback signal, and the feedback signal is sent to the voltage conversion circuit. , the voltage conversion circuit adjusts the driving voltage according to the feedback signal.

Description

technical field [0001] The present invention relates to a driving circuit that can provide feedback control and open-circuit protection and its related driving method, especially to a method that uses an analysis and judgment circuit to detect the state of a light-emitting device to provide feedback control and open-circuit protection Driving circuit and related driving method. Background technique [0002] Due to the advantages of small size and low power consumption of light emitting diodes (Light Emitting Diode, hereinafter referred to as LED), light emitting diodes have been developed and applied in backlight modules to replace traditional cold cathode ray tubes (Cold Cathode F1uorescentLamp) , CCFL). It has been widely used in consumer, advertising, industrial, military and other applications, and has become one of the focuses of electronic industry research and development. Light-emitting diodes are semiconductor devices that directly convert electrical energy into l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B37/03H02H9/00G09G3/34
Inventor 江永欣王仕元
Owner IML HONG KONG LTD