CN101826302A - Selective energy-saving circuit of LED full-color screen - Google Patents
Selective energy-saving circuit of LED full-color screen Download PDFInfo
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- CN101826302A CN101826302A CN201010192720A CN201010192720A CN101826302A CN 101826302 A CN101826302 A CN 101826302A CN 201010192720 A CN201010192720 A CN 201010192720A CN 201010192720 A CN201010192720 A CN 201010192720A CN 101826302 A CN101826302 A CN 101826302A
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Abstract
The invention relates to a selective energy-saving circuit of an LED full-color screen. The selective energy-saving circuit comprises a 220V AC-to-24V DC power supply, a 24V DC-to-5V DC step-down circuit, a control unit, an LED driving unit, an LED display unit, a 24V DC-to-4V DC step-down circuit, a 24V DC-to-2.7V DC step-down circuit and a selection circuit, wherein the DC voltage output end of each step-down circuit is connected with an LED in the LED display unit through the selection circuit. Generally, the selection circuit outputs a 4V voltage to supply power the blue and green LEDs and outputs a 2.7V voltage to supply power the red LED; and under special circumstances, the selection circuit outputs a 5V voltage to supply power to all the LEDs. The selective energy-saving circuit reduces the energy consumption of the LED full-color screen, reduces the failure of the LED, prolongs the working life of the LED full-color screen and can maintain the LED brightness when the LED is aged.
Description
Technical field
The present invention relates to a kind of LED full-color screen selective energy-saving circuit.
Background technology
At present, general LED full-color screen be adopt fixing output voltage 5V power module directly to each chip for driving and ruddiness, green glow, blue-ray LED power supply.Though this design simplification driving circuit, but since ruddiness, green glow and blue-ray LED can reach normal when luminous required voltage have nothing in common with each other, so adopt unified voltage 5V will to bring unnecessary loss for ruddiness, green glow and blue-ray LED power supply, simultaneously also will influence the normal luminescent lifetime of LED, easily cause the dead lamp of partial L ED.
Summary of the invention
The object of the present invention is to provide a kind of LED full-color screen selective energy-saving circuit, the difference that it requires supply voltage according to LED of all kinds, respectively red-light LED, green light LED and blue-ray LED are distributed different supply voltages, thereby reach the purpose that cuts down the consumption of energy, improve the serviceable life of full-color screen LED simultaneously, reduced the generation of the dead lamp phenomenon of LED.In addition, the present invention can also select the 5V DC voltage to all LED power supplies of all kinds under the situation that LED brightness reduces, and makes LED can reach normal luminosity by improving supply voltage.
Technical scheme of the present invention: a kind of LED full-color screen selective energy-saving circuit, comprise that 220V exchanges commentaries on classics 24V direct supply, the 24V direct current changes the 5V direct-current voltage reducing circuit, control module, the LED driver element, led display unit, it is characterized in that: also comprise: the 24V direct current changes the 4V direct-current voltage reducing circuit, the 24V direct current changes the 2.7V direct-current voltage reducing circuit, described 220V exchanges the dc voltage output end that changes the 24V direct supply and connects the voltage input end that described 24V direct current changes the 5V direct-current voltage reducing circuit respectively, the 24V direct current changes the voltage input end of 4V direct-current voltage reducing circuit and the voltage input end that the 24V direct current changes the 2.7V direct-current voltage reducing circuit, and the voltage output end that described 24V direct current changes the 5V direct-current voltage reducing circuit connects the power input of described control module and the power input of described LED driver element; The shows signal output terminal of described control module connects the shows signal input end of described LED driver element, and the drive signal output terminal of described LED driver element connects the driving signal input of described led display unit; Described 24V direct current changes the 5V direct-current voltage reducing circuit, the 24V direct current changes the 4V direct-current voltage reducing circuit, be provided with one between 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit and the described led display unit and select circuit, this LED voltage of selecting the signal controlling input end of circuit to connect control module is selected signal output part, select three voltage input ends of circuit to connect described 24V direct current commentaries on classics 5V direct-current voltage reducing circuit respectively, the 24V direct current changes the dc voltage output end of 4V direct-current voltage reducing circuit and 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit, described selection circuit one direct current voltage output end connects the red LED in the described led display unit, and another dc voltage output end of described selection circuit connects blueness and the green LED in the described led display unit.
A kind of LED full-color screen of the present invention selective energy-saving circuit can distribute different supply voltages to red-light LED, green light LED and blue-ray LED respectively, thereby cut down the consumption of energy, having solved LED display commonly used simultaneously causes the relative normal working voltage of service voltage of partial L ED higher because of the driving voltage unification for 5V, bring unnecessary loss, influence the problem in LED life-span.In addition at the LED full-color screen after long-term the use, LED occurs under the brightness reduction situation because of aging, the present invention can also power for LED of all kinds by selecting unified 5V DC voltage, can keep the normal luminosity of LED with this.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Embodiment
Specify the present invention below in conjunction with accompanying drawing.
A kind of LED full-color screen selective energy-saving circuit, comprise that 220V exchanges commentaries on classics 24V direct supply 1, the 24V direct current changes 5V direct-current voltage reducing circuit 2, control module 3, LED driver element 4, led display unit 5, also comprise: the 24V direct current changes 4V direct-current voltage reducing circuit 6, the 24V direct current changes 2.7V direct-current voltage reducing circuit 7, described 220V exchanges the dc voltage output end 9 that changes the 24V direct supply and connects the voltage input end that described 24V direct current changes the 5V direct-current voltage reducing circuit respectively, the 24V direct current changes the voltage input end of 4V direct-current voltage reducing circuit and the voltage input end that the 24V direct current changes the 2.7V direct-current voltage reducing circuit, and the voltage output end 10 that described 24V direct current changes the 5V direct-current voltage reducing circuit connects the power input of described control module and the power input of described LED driver element; The shows signal output terminal 11 of described control module connects the shows signal input end of described LED driver element, and the drive signal output terminal 12 of described LED driver element connects the driving signal input of described led display unit; Described 24V direct current changes 5V direct-current voltage reducing circuit 2, the 24V direct current changes 4V direct-current voltage reducing circuit 6, be provided with one between 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit 7 and the described led display unit and select circuit 8, this LED voltage of selecting the signal controlling input end of circuit to connect control module is selected signal output part 13, select three voltage input ends of circuit to connect described 24V direct current commentaries on classics 5V direct-current voltage reducing circuit respectively, the 24V direct current changes the dc voltage output end 10 of 4V direct-current voltage reducing circuit and 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit, 14,15, the red LED that described selection circuit one direct current voltage output end 16 connects in the described led display unit 5, blueness and green LED that another dc voltage output end 17 of described selection circuit connects in the described led display unit 5.
In the ordinary course of things, be that red LED can be normally luminous under the 2.7V DC-voltage supply, and blue and green LED can be under normal luminous situation under the 4V DC-voltage supply, described control module 3 is that the 4V DC voltage that 24V direct current commentaries on classics 4V direct-current voltage reducing circuit is exported is transferred to blueness and green LED by selecting circuit one direct current voltage output end to selecting circuit output LED voltage to select signal, the 2.7V DC voltage of simultaneously the 24V direct current being changeed the output of 2.7V direct-current voltage reducing circuit is transferred to red LED by selecting another dc voltage output end of circuit, distribute the supply voltage that is fit to promptly for the LED of different colours, the supply voltage of LED decreases in more traditional LED color screen, saved power consumption, reduce the dead lamp phenomenon of LED, prolonged the luminescent lifetime of LED relatively.
After the long-term use of LED full-color screen, LED can be because reason such as aging, its brightness decreases, in this case, select signal by control module to selecting circuit to export LED voltage, it is transferred to redness, blueness and green LED with the 5V DC voltage that the 24V direct current changes the output of 5V direct-current voltage reducing circuit respectively by two dc voltage output ends selecting circuit, promptly by suitably improving the supply voltage of LED of all kinds, to guarantee the normal luminosity of LED.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (1)
1. LED full-color screen selective energy-saving circuit, comprise that 220V exchanges commentaries on classics 24V direct supply, the 24V direct current changes the 5V direct-current voltage reducing circuit, control module, the LED driver element, led display unit, it is characterized in that: also comprise: the 24V direct current changes the 4V direct-current voltage reducing circuit, the 24V direct current changes the 2.7V direct-current voltage reducing circuit, described 220V exchanges the dc voltage output end that changes the 24V direct supply and connects the voltage input end that described 24V direct current changes the 5V direct-current voltage reducing circuit respectively, the 24V direct current changes the voltage input end of 4V direct-current voltage reducing circuit and the voltage input end that the 24V direct current changes the 2.7V direct-current voltage reducing circuit, and the voltage output end that described 24V direct current changes the 5V direct-current voltage reducing circuit connects the power input of described control module and the power input of described LED driver element; The shows signal output terminal of described control module connects the shows signal input end of described LED driver element, and the drive signal output terminal of described LED driver element connects the driving signal input of described led display unit; Described 24V direct current changes the 5V direct-current voltage reducing circuit, the 24V direct current changes the 4V direct-current voltage reducing circuit, be provided with one between 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit and the described led display unit and select circuit, this LED voltage of selecting the signal controlling input end of circuit to connect control module is selected signal output part, select three voltage input ends of circuit to connect described 24V direct current commentaries on classics 5V direct-current voltage reducing circuit respectively, the 24V direct current changes the dc voltage output end of 4V direct-current voltage reducing circuit and 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit, described selection circuit one direct current voltage output end connects the red LED in the described led display unit, and another dc voltage output end of described selection circuit connects blueness and the green LED in the described led display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101927204A CN101826302B (en) | 2010-06-07 | 2010-06-07 | Selective energy-saving circuit of LED full-color screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101927204A CN101826302B (en) | 2010-06-07 | 2010-06-07 | Selective energy-saving circuit of LED full-color screen |
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| Publication Number | Publication Date |
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| CN101826302A true CN101826302A (en) | 2010-09-08 |
| CN101826302B CN101826302B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101927204A Expired - Fee Related CN101826302B (en) | 2010-06-07 | 2010-06-07 | Selective energy-saving circuit of LED full-color screen |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014082431A1 (en) * | 2012-11-29 | 2014-06-05 | 利亚德光电股份有限公司 | Led display device and led control system |
| CN103854598A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | Led display |
| CN103854596A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | Led display |
| CN105489161A (en) * | 2016-01-27 | 2016-04-13 | 利亚德光电股份有限公司 | LED display screen, and power supply control method and apparatus thereof |
| CN110133937A (en) * | 2019-06-17 | 2019-08-16 | 深圳市光羿科技有限公司 | A kind of electrochromism control circuit and control method, rearview mirror |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421839A (en) * | 2001-07-31 | 2003-06-04 | 金在南 | Double-voltage electric power equipment |
| CN201262809Y (en) * | 2008-10-10 | 2009-06-24 | 上海金陵时威科技发展股份有限公司 | Energy-saving device of LED electronic display screen |
| CN201489799U (en) * | 2009-08-24 | 2010-05-26 | 康佳集团股份有限公司 | LED display screen and power supply circuit thereof |
| CN201804532U (en) * | 2010-06-07 | 2011-04-20 | 福建科维光电科技有限公司 | Selective energy-saving circuit of LED full color screen |
-
2010
- 2010-06-07 CN CN2010101927204A patent/CN101826302B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421839A (en) * | 2001-07-31 | 2003-06-04 | 金在南 | Double-voltage electric power equipment |
| CN201262809Y (en) * | 2008-10-10 | 2009-06-24 | 上海金陵时威科技发展股份有限公司 | Energy-saving device of LED electronic display screen |
| CN201489799U (en) * | 2009-08-24 | 2010-05-26 | 康佳集团股份有限公司 | LED display screen and power supply circuit thereof |
| CN201804532U (en) * | 2010-06-07 | 2011-04-20 | 福建科维光电科技有限公司 | Selective energy-saving circuit of LED full color screen |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014082431A1 (en) * | 2012-11-29 | 2014-06-05 | 利亚德光电股份有限公司 | Led display device and led control system |
| CN103854598A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | Led display |
| CN103854596A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | Led display |
| CN103854598B (en) * | 2012-11-29 | 2016-08-10 | 利亚德光电股份有限公司 | Light-emitting diode display |
| CN105489161A (en) * | 2016-01-27 | 2016-04-13 | 利亚德光电股份有限公司 | LED display screen, and power supply control method and apparatus thereof |
| CN110133937A (en) * | 2019-06-17 | 2019-08-16 | 深圳市光羿科技有限公司 | A kind of electrochromism control circuit and control method, rearview mirror |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101826302B (en) | 2012-05-30 |
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