CN101826302B - 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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- CN101826302B CN101826302B CN2010101927204A CN201010192720A CN101826302B CN 101826302 B CN101826302 B CN 101826302B CN 2010101927204 A CN2010101927204 A CN 2010101927204A CN 201010192720 A CN201010192720 A CN 201010192720A CN 101826302 B CN101826302 B CN 101826302B
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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, be prone to 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 various power voltage; Thereby reach the purpose that cuts down the consumption of energy, improved the serviceable life of full-color screen LED simultaneously, reduce 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 through 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 5V direct-current voltage reducing circuit, control module, 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; Said 220V exchanges voltage input end, the voltage input end of 24V direct current commentaries on classics 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 that the dc voltage output end that changes the 24V direct supply connects said 24V direct current commentaries on classics 5V direct-current voltage reducing circuit respectively, and the voltage output end that said 24V direct current changes the 5V direct-current voltage reducing circuit connects the power input of said control module and the power input of said LED driver element; The shows signal output terminal of said control module connects the shows signal input end of said LED driver element, and the drive signal output terminal of said LED driver element connects the driving signal input of said led display unit; Be provided with one between said 24V direct current commentaries on classics 5V direct-current voltage reducing circuit, 24V direct current commentaries on classics 4V direct-current voltage reducing circuit, 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit and the said 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 the dc voltage output end that said 24V direct current changes 5V direct-current voltage reducing circuit, 24V direct current commentaries on classics 4V direct-current voltage reducing circuit and 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit respectively; Said selection circuit one direct current voltage output end connects the red LED in the said led display unit, and another dc voltage output end of said selection circuit connects blueness and the green LED in the said led display unit.
A kind of LED full-color screen of the present invention selective energy-saving circuit can distribute various power voltage 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 supply power for LED of all kinds through 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; Said 220V exchanges voltage input end, the voltage input end of 24V direct current commentaries on classics 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 that the dc voltage output end 9 that changes the 24V direct supply connects said 24V direct current commentaries on classics 5V direct-current voltage reducing circuit respectively, and the voltage output end 10 that said 24V direct current changes the 5V direct-current voltage reducing circuit connects the power input of said control module and the power input of said LED driver element; The shows signal output terminal 11 of said control module connects the shows signal input end of said LED driver element, and the drive signal output terminal 12 of said LED driver element connects the driving signal input of said led display unit; Said 24V direct current changes 5V direct-current voltage reducing circuit 2,24V direct current and changes 4V direct-current voltage reducing circuit 6,24V direct current and change between 2.7V direct-current voltage reducing circuit 7 and the said led display unit and be provided with a selection 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 the dc voltage output end 10,14,15 that said 24V direct current changes 5V direct-current voltage reducing circuit, 24V direct current commentaries on classics 4V direct-current voltage reducing circuit and 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit respectively; The red LED that said selection circuit one direct current voltage output end 16 connects in the said led display unit 5, blueness and green LED that another dc voltage output end 17 of said selection circuit connects in the said 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; Said 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 through selecting circuit one direct current voltage output end to selecting circuit to export LED voltage selection signal, and the 2.7V DC voltage of simultaneously 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit being exported is transferred to red LED through another dc voltage output end of selection circuit, and promptly the LED to different colours distributes suitable supply voltage; The supply voltage of LED decreases in more traditional LED color screen; Practice thrift power consumption, reduced 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, and its brightness decreases, in this case; Select signal through 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 through two dc voltage output ends selecting circuit, promptly through suitably improving the supply voltage of LED of all kinds, to guarantee the normal luminosity of LED.
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention 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 5V direct-current voltage reducing circuit, control module, 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; Said 220V exchanges voltage input end, the voltage input end of 24V direct current commentaries on classics 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 that the dc voltage output end that changes the 24V direct supply connects said 24V direct current commentaries on classics 5V direct-current voltage reducing circuit respectively, and the voltage output end that said 24V direct current changes the 5V direct-current voltage reducing circuit connects the power input of said control module and the power input of said LED driver element; The shows signal output terminal of said control module connects the shows signal input end of said LED driver element, and the drive signal output terminal of said LED driver element connects the driving signal input of said led display unit; Be provided with one between said 24V direct current commentaries on classics 5V direct-current voltage reducing circuit, 24V direct current commentaries on classics 4V direct-current voltage reducing circuit, 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit and the said 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 the dc voltage output end that said 24V direct current changes 5V direct-current voltage reducing circuit, 24V direct current commentaries on classics 4V direct-current voltage reducing circuit and 24V direct current commentaries on classics 2.7V direct-current voltage reducing circuit respectively; Said selection circuit one direct current voltage output end connects the red LED in the said led display unit; Another dc voltage output end of said selection circuit connects blueness and the green LED in the said led display unit; Said led display unit is after long-term the use; Select signal through 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 through two dc voltage output ends selecting circuit, improves LED supply voltage of all kinds, guarantees the normal luminosity of LED.
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 CN101826302A (en) | 2010-09-08 |
| CN101826302B true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854597A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | LED display and LED control system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854598B (en) * | 2012-11-29 | 2016-08-10 | 利亚德光电股份有限公司 | Light-emitting diode 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 |
| CN110133937B (en) * | 2019-06-17 | 2024-09-17 | 深圳市光羿科技有限公司 | Electrochromic control circuit, control method and 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 |
-
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- 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854597A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | LED display and LED control system |
| CN103854597B (en) * | 2012-11-29 | 2016-08-10 | 利亚德光电股份有限公司 | Light-emitting diode display and LED control system |
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| Publication number | Publication date |
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| CN101826302A (en) | 2010-09-08 |
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