CN102129834A - LED (Light Emitting Diode) display screen and driving circuit thereof - Google Patents
LED (Light Emitting Diode) display screen and driving circuit thereof Download PDFInfo
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- CN102129834A CN102129834A CN2010100427899A CN201010042789A CN102129834A CN 102129834 A CN102129834 A CN 102129834A CN 2010100427899 A CN2010100427899 A CN 2010100427899A CN 201010042789 A CN201010042789 A CN 201010042789A CN 102129834 A CN102129834 A CN 102129834A
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Abstract
The invention is suitable for the field of LED (Light Emitting Diode) display and provides an LED display screen and a driving circuit thereof. In the invention, the driving circuit of the LED display screen comprises an intelligent power supply module connected between an AC to DC module and an anode of an LED light emitting tube and connected with a constant current driving end of a driving chip, wherein the intelligent power supply module regulates and outputs the anode voltage of the LED light emitting tube, which ensures the driving chip works at a minimum power consumption mode, according to the voltage of the constant current driving end of the driving chip, therefore, the power consumption and the heat productivity of the driving chip are reduced, and thus the power consumption and the heat productivity of the LED display screen are reduced.
Description
Technical field
The invention belongs to LED and show the field, relate in particular to a kind of LED display and driving circuit thereof.
Background technology
LED display is the display mode by the control semiconductor light-emitting-diode, is made up of a lot of redness, green, blue lampet, comes display image by the light on and off degree of lamp.LED display display frame is bright in luster, stereoscopic sensation is strong, quiet as oil painting, moving as film, be widely used in finance, the tax, industry and commerce, post and telecommunications, physical culture, advertisement, industrial enterprise, communications and transportation, educational system, station, harbour, airport, market, hospital, hotel, bank, securities market, construction market, auction room, Industrial Management and other public place.
Why LED display is subjected to extensively paying attention to and is developed rapidly, be that the advantage that had with LED itself is inseparable, these advantages are summarized: brightness height, operating voltage are low, miniaturization, the life-span is long, shock-resistant and stable performance, the development prospect of LED is very wide, at present just towards high brightness more, more high weather resistance, higher luminous density, higher uniformity of luminance, reliability, panchromaticization direction develop.It is excessive serious with heating that but the outstanding problem that present LED display faces is a power consumption, and this mainly is because the chip for driving in the LED display causes.
Heating seriously can increase the cost of display screen, heating seriously also can affect to the LED display performance, for example LED display inner heat inequality causes display screen the color spot problem to occur, higher chip reliability, the stability of causing of chip temperature rise reduces, LED luminotron long-term mission life when temperature is high descends simultaneously, the LED display internal temperature raises and causes the Switching Power Supply transformation efficiency to descend, influence the Switching Power Supply life-span, heating seriously also can be quickened the aging of LED display electronic component, and this has increased LED display after-sales service expense undoubtedly.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of LED display driving circuit, is intended to solve existing LED display and has the problem that power consumption is excessive and heating is serious.
The embodiment of the invention is to realize like this, a kind of LED display driving circuit, described LED display driving circuit comprises the AC-DC module that alternating voltage is converted to DC voltage, the chip for driving of the negative electrode of LED luminotron and the described LED luminotron of constant-current driving termination, described LED display driving circuit also comprises between the anode that is connected described AC-DC module and LED luminotron, and the intelligent power module that is connected with the constant-current driving end of described chip for driving, be used for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, and, regulate output and make the LED luminotron anode voltage of chip for driving with the work of minimum power consumption pattern according to the constant-current driving terminal voltage of chip for driving.
In the said structure, described intelligent power module comprises:
The direct current that is connected between the anode of described AC-DC module and LED luminotron becomes direct current transducer, is used for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage.
In the said structure, described intelligent power module also comprises:
The analog to digital converter that is connected with the constant-current driving end of described chip for driving is converted to digital quantity with described constant-current driving terminal voltage by analog quantity.
In the said structure, described intelligent power module also comprises:
The microcontroller that is connected with described analog to digital converter, be used for the constant-current driving terminal voltage and the predeterminated voltage of described digital quantity form are made comparisons, if described constant-current driving terminal voltage is greater than predeterminated voltage, then LED luminotron anode voltage control signal is turned down in output, if described constant-current driving terminal voltage is less than predeterminated voltage, then LED luminotron anode voltage control signal is heightened in output.
In the said structure, described intelligent power module also comprises:
Become the digital regulation resistance that direct current transducer is connected with described microcontroller with direct current respectively, be used for according to the turning down LED luminotron anode voltage control signal and heighten LED luminotron anode voltage control signal of described microcontroller output, control described direct current and become direct current transducer and regulate output and make the LED luminotron anode voltage of chip for driving with the work of minimum power consumption pattern.
Another purpose of the embodiment of the invention is to provide a kind of LED display, and described LED display comprises above-mentioned LED display driving circuit.
In embodiments of the present invention, the LED display driving circuit comprises between the anode that is connected AC-DC module and LED luminotron, and the intelligent power module that is connected with the constant-current driving end of chip for driving, the intelligent power module is according to the constant-current driving terminal voltage of chip for driving, regulate output and make the LED luminotron anode voltage of chip for driving with the work of minimum power consumption pattern, reduce the power consumption and the thermal value of chip for driving like this, thereby reduced the power consumption and the thermal value of LED display.
Description of drawings
Fig. 1 is the structural drawing of the LED display driving circuit that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the structure of the LED display driving circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
The LED display driving circuit comprises the AC-DC module 100 that alternating voltage is converted to DC voltage, the chip for driving 300 of the negative electrode of LED luminotron 200 and constant-current driving termination LED luminotron 200, the LED display driving circuit also comprises between the anode that is connected AC-DC module 100 and LED luminotron 200, and the intelligent power module 400 that is connected with the constant-current driving end of chip for driving 300, intelligent power module 400 is converted to LED luminotron 200 anode voltages with the DC voltage of AC-DC module 100 outputs, and, regulate output and make LED luminotron 200 anode voltages of chip for driving 300 with the work of minimum power consumption pattern according to the constant-current driving terminal voltage of chip for driving 300.
As one embodiment of the invention, intelligent power module 400 comprises:
The direct current that is connected between the anode of AC-DC module 100 and LED luminotron 200 becomes direct current transducer 401, is used for the DC voltage of AC-DC module 100 outputs is converted to LED luminotron 200 anode voltages;
Analog to digital converter 402 with the constant-current driving end of chip for driving 300 is connected is converted to digital quantity with the constant-current driving terminal voltage by analog quantity;
The microcontroller 403 that is connected with analog to digital converter 402, be used for the constant-current driving terminal voltage and the predeterminated voltage of digital quantity form are made comparisons, if the constant-current driving terminal voltage is greater than predeterminated voltage, then LED luminotron 200 anode voltage control signals are turned down in output, if the constant-current driving terminal voltage is less than predeterminated voltage, then LED luminotron 200 anode voltage control signals are heightened in output;
Become the digital regulation resistance 404 that direct current transducer 401 is connected with microcontroller 403 with direct current respectively, be used for according to the turning down LED luminotron 200 anode voltage control signals and heighten LED luminotron 200 anode voltage control signals of microcontroller 403 output, the control direct current becomes direct current transducer 401 to be regulated output and makes LED luminotron 200 anode voltages of chip for driving 300 with the work of minimum power consumption pattern.
Because the constant-current driving terminal voltage of chip for driving 300 is directly proportional with power consumption, therefore intelligent power module 400 is according to the constant-current driving terminal voltage of chip for driving 300, can judge that whether chip for driving 300 is with the work of minimum power consumption pattern, if not, intelligent power module 400 is regulated output LED luminotron 200 anode voltages makes chip for driving 300 with the work of minimum power consumption pattern.
The embodiment of the invention also provides a kind of LED display that comprises above-mentioned LED display driving circuit.
In embodiments of the present invention, the LED display driving circuit comprises between the anode that is connected AC-DC module and LED luminotron, and the intelligent power module that is connected with the constant-current driving end of chip for driving, the intelligent power module is according to the constant-current driving terminal voltage of chip for driving, regulate output and make the LED luminotron anode voltage of chip for driving with the work of minimum power consumption pattern, reduce the power consumption and the thermal value of chip for driving like this, thereby reduced the power consumption and the thermal value of LED display.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. LED display driving circuit, described LED display driving circuit comprises the AC-DC module that alternating voltage is converted to DC voltage, the chip for driving of the negative electrode of LED luminotron and the described LED luminotron of constant-current driving termination, it is characterized in that, described LED display driving circuit also comprises between the anode that is connected described AC-DC module and LED luminotron, and the intelligent power module that is connected with the constant-current driving end of described chip for driving, be used for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, and, regulate output and make the LED luminotron anode voltage of chip for driving with the work of minimum power consumption pattern according to the constant-current driving terminal voltage of chip for driving.
2. LED display driving circuit as claimed in claim 1 is characterized in that, described intelligent power module comprises:
The direct current that is connected between the anode of described AC-DC module and LED luminotron becomes direct current transducer, is used for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage.
3. LED display driving circuit as claimed in claim 2 is characterized in that, described intelligent power module also comprises:
The analog to digital converter that is connected with the constant-current driving end of described chip for driving is converted to digital quantity with described constant-current driving terminal voltage by analog quantity.
4. LED display driving circuit as claimed in claim 3 is characterized in that, described intelligent power module also comprises:
The microcontroller that is connected with described analog to digital converter, be used for the constant-current driving terminal voltage and the predeterminated voltage of described digital quantity form are made comparisons, if described constant-current driving terminal voltage is greater than predeterminated voltage, then LED luminotron anode voltage control signal is turned down in output, if described constant-current driving terminal voltage is less than predeterminated voltage, then LED luminotron anode voltage control signal is heightened in output.
5. LED display driving circuit as claimed in claim 4 is characterized in that, described intelligent power module also comprises:
Become the digital regulation resistance that direct current transducer is connected with described microcontroller with direct current respectively, be used for according to the turning down LED luminotron anode voltage control signal and heighten LED luminotron anode voltage control signal of described microcontroller output, control described direct current and become direct current transducer and regulate output and make the LED luminotron anode voltage of chip for driving with the work of minimum power consumption pattern.
6. a LED display is characterized in that, described LED display comprises each described LED display driving circuit as claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100427899A CN102129834B (en) | 2010-01-14 | 2010-01-14 | LED (Light Emitting Diode) display screen and driving circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100427899A CN102129834B (en) | 2010-01-14 | 2010-01-14 | LED (Light Emitting Diode) display screen and driving circuit thereof |
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| Publication Number | Publication Date |
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| CN102129834A true CN102129834A (en) | 2011-07-20 |
| CN102129834B CN102129834B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010100427899A Expired - Fee Related CN102129834B (en) | 2010-01-14 | 2010-01-14 | LED (Light Emitting Diode) display screen and driving circuit thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183218A (en) * | 2014-08-21 | 2014-12-03 | 深圳市信立方科技有限公司 | LED display screen driving circuit and display screen |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007042758A (en) * | 2005-08-01 | 2007-02-15 | Harison Toshiba Lighting Corp | Led driving device |
| CN201207271Y (en) * | 2008-05-16 | 2009-03-11 | 康佳集团股份有限公司 | Working current regulating circuit of LED module |
| 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 |
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2010
- 2010-01-14 CN CN2010100427899A patent/CN102129834B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183218A (en) * | 2014-08-21 | 2014-12-03 | 深圳市信立方科技有限公司 | LED display screen driving circuit and display screen |
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| CN102129834B (en) | 2013-06-05 |
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Address after: 518000 1805, tower 2, Shenye Jinyuan Building, No.112, Qingshuihe 1st Road, Qingshuihe community, Luohu District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN AOTO ELECTRONICS Co.,Ltd. Address before: 518057. T2 building A6-B, South District, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: SHENZHEN AOTO ELECTRONICS Co.,Ltd. |
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Granted publication date: 20130605 Termination date: 20210114 |
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