CN201804532U - 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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- CN201804532U CN201804532U CN2010202167904U CN201020216790U CN201804532U CN 201804532 U CN201804532 U CN 201804532U CN 2010202167904 U CN2010202167904 U CN 2010202167904U CN 201020216790 U CN201020216790 U CN 201020216790U CN 201804532 U CN201804532 U CN 201804532U
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Abstract
The utility model relates to a selective energy-saving circuit of an LED full color screen, which comprises a 220V AC/24V DC power source, a 24V DC/5V DC voltage step-down circuit, a control unit, an LED driving unit, and an LED display unit. The selective energy-saving circuit further comprises a 24V DC/4V DC voltage step-down circuit, a 24V DC/2.7V DC voltage step-down circuit and a selecting circuit. The DC voltage output terminals of all step-down circuits are connected with the LEDs in the LED display unit through the selecting circuit. In general, the selecting circuit outputs 4V power to the blue LED and the green LED and outputs 2.7V power to the red LED. In the particular case, the selecting circuit outputs 5V power to all the LEDs. The utility model reduces the energy consumption of the LED full color screen, avoids the failure of the LEDs, prolongs the operating life of the LED full color screen, and maintains the brightness of the LEDs regardless of the aging of the LEDs.
Description
Technical field
The utility model 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 purpose of this utility model 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 utility model 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.
The technical solution of the utility model: 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 utility model 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 utility model 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 the utility model circuit block diagram.
Embodiment
Specify the utility model 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 utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
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 |
|---|---|---|---|
| CN2010202167904U CN201804532U (en) | 2010-06-07 | 2010-06-07 | Selective energy-saving circuit of LED full color screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202167904U CN201804532U (en) | 2010-06-07 | 2010-06-07 | Selective energy-saving circuit of LED full color screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201804532U true CN201804532U (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202167904U Expired - Fee Related CN201804532U (en) | 2010-06-07 | 2010-06-07 | Selective energy-saving circuit of LED full color screen |
Country Status (1)
| Country | Link |
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| CN (1) | CN201804532U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826302A (en) * | 2010-06-07 | 2010-09-08 | 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 CN2010202167904U patent/CN201804532U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826302A (en) * | 2010-06-07 | 2010-09-08 | 福建科维光电科技有限公司 | Selective energy-saving circuit of LED full-color screen |
| CN101826302B (en) * | 2010-06-07 | 2012-05-30 | 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20140607 |