CN104183218A - LED display screen driving circuit and display screen - Google Patents
LED display screen driving circuit and display screen Download PDFInfo
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- CN104183218A CN104183218A CN201410415040.2A CN201410415040A CN104183218A CN 104183218 A CN104183218 A CN 104183218A CN 201410415040 A CN201410415040 A CN 201410415040A CN 104183218 A CN104183218 A CN 104183218A
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Abstract
The invention relates to an LED display screen driving circuit and a display screen. The LED display screen driving circuit comprises an alternating current to direct current conversion module, an LED and a driving chip, wherein the alternating current to direct current conversion module is used for converting alternating-current voltage to direct-current voltage, and the constant-current driving end of the driving chip is connected with the cathode of the LED. The LED display screen driving circuit further comprises an intelligent power supply module, wherein the intelligent power supply module is connected between the alternating current to direct current conversion module and the anode of the LED, connected with the constant-current driving end of the driving chip, and used for converting the direct-current voltage output by the alternating current to direct current conversion module into the anode voltage of the LED and regulating and outputting the LED anode voltage which makes the driving chip to work in the minimum power consumption mode according to the constant-current driving end voltage of the driving chip. The LED display screen driving circuit and the display screen have the advantages of being low in power consumption, good in heat dissipation effect, capable of saving energy and environmentally friendly, and short-distance and long-time watching can be achieved.
Description
Technical field
The present invention relates to a kind of LED display driving circuit and display screen.
Background technology
Associated mechanisms prediction, within 2014, whole highly dense little clearance display screen is expected to reach 2,000,000,000 the market growth.In the view of at present, little space distance LED display screen has started to march to surging places of ruling of DLP splicing product such as TV station, high-end meeting room, the high-end consumer goods, analog simulations, and has captured the increasing market share.Because traditional LED display mainly concentrates on outdoor utility, brightness is more high better, and different in indoor application, brightness will be controlled within the specific limits; In order to meet the demands such as display quality and shooting relay, also need to guarantee sufficiently high gray scale and refreshing frequency simultaneously.Correlative study discovery, when indoor application, the brightness range of LED display should be controlled at 100cd/m2-300cd/m2, is that underwriter observes the optimum range of seeing comfort level.This also just means, little space distance LED display screen wants to march indoor market, and brightness will lower.But, do not reduce in gray scale, and guarantee in the situation of high refreshing frequency but and be not easy, because, use the gray scale of the LED display of traditional constant-current driven chip to reduce along with the reduction of brightness of display screen, refreshing frequency does not reach requirement yet, thus the display effect of having a strong impact on.
Summary of the invention
In view of the above-mentioned problems in the prior art, fundamental purpose of the present invention is to address the deficiencies of the prior art, and the invention provides that a kind of power consumption is little, good heat dissipation effect, can closely watch for a long time and LED display driving circuit and the display screen of energy-conserving and environment-protective.
The invention provides a kind of LED display driving circuit, comprise the AC-DC module that alternating voltage is converted to DC voltage, the driving chip of the negative electrode of LED luminotron described in LED luminotron and constant current driving termination, described LED display driving circuit also comprises and being connected between described AC-DC module and the anode of LED luminotron, and the intelligent power module being connected with the constant current drive end of described driving chip, for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, and according to the constant current drive end voltage that drives chip, regulation output makes to drive chip with the LED luminotron anode voltage of minimum power consumption work pattern, wherein, described intelligent power module comprises that the direct current being connected between described AC-DC module and the anode of LED luminotron straightens stream transformer, for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, described driving chip comprises shift register, ping-pong structure RAM module, instruction analysis device, configuration register, isochronous controller and unsteady flow generator, described shift register is connected with described ping-pong structure RAM module with described instruction analysis device respectively, described configuration register respectively with described instruction analysis device, described ping-pong structure RAM module is connected with described isochronous controller, described waveform generator is connected with described unsteady flow generator with described ping-pong structure RAM module respectively, described isochronous controller is also connected with described ping-pong structure RAM module.
Optionally, described intelligent power module also comprises the analog to digital converter being connected with the constant current drive end of described driving chip, and described constant current drive end voltage is converted to digital quantity by analog quantity.
Optionally, the microcontroller being connected with described analog to digital converter, for constant current drive end voltage and the predeterminated voltage of described digital quantity form are made comparisons, if described constant current drive end voltage is greater than predeterminated voltage, LED luminotron anode voltage control signal is turned down in output, if described constant current drive end voltage is less than predeterminated voltage, LED luminotron anode voltage control signal is heightened in output.
Optionally, described intelligent power module also comprises respectively and straightens with described microcontroller and direct current the digital regulation resistance that stream transformer is connected, 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 straighten stream transformer regulation output and make to drive chip with the LED luminotron anode voltage of minimum power consumption work pattern.
Optionally, described ping-pong structure RAM module is 16Kbit ping-pong structure RAM module, comprises column decode circuitry, array decoding circuit, table tennis control circuit and Bit Cell circuit, and described Bit Cell is comprised of 6 pipe MOS, is a basic data storage cell.
Optionally, described decoding scheme and described array decoding circuit form the addressing circuit of Bit Cell jointly.
The present invention also provides a kind of LED display, and described LED display comprises LED display driving circuit as described above,
The present invention has the following advantages and beneficial effect: the invention provides a kind of LED display driving circuit and display screen, the low ash that this display drive circuit solution industry traditional constant-current driven chip in the little space distance LED display screen of indoor high-density cannot be realized under low-light level demonstration is even, high gray shade scale output, and the difficult problem such as high refreshing frequency, solution cannot adapt to closely to be watched for a long time, there is mosaic color spot, color is not soft, the visual fatigue that screen flicker sense causes etc. and research and development designs, also reduced the power consumption of display screen simultaneously, realized the object of environmental protection and energy saving.
Accompanying drawing explanation
Fig. 1 is the structural representation of LED display driving circuit of the present invention;
Fig. 2 drives the structural representation of chip in Fig. 1.
Embodiment
The present invention is further illustrated with specific embodiment below with reference to accompanying drawings.
As shown in Figure 1 to Figure 2: a kind of LED display driving circuit of the embodiment of the present invention, comprise the AC-DC module 100 that alternating voltage is converted to DC voltage, the driving chip 300 of the negative electrode of LED luminotron described in LED luminotron 200 and constant current driving termination, described LED display driving circuit also comprises and being connected between described AC-DC module 100 and the anode of LED luminotron, and the intelligent power module 400 being connected with the constant current drive end of described driving chip, for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, and according to the constant current drive end voltage that drives chip, regulation output makes to drive chip with the LED luminotron anode voltage of minimum power consumption work pattern, wherein, described intelligent power module 400 comprises that the direct current being connected between described AC-DC module and the anode of LED luminotron straightens stream transformer 401, for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, described driving chip comprises shift register, ping-pong structure RAM module, instruction analysis device, configuration register, isochronous controller and unsteady flow generator, described shift register is connected with described ping-pong structure RAM module with described instruction analysis device respectively, described configuration register respectively with described instruction analysis device, described ping-pong structure RAM module is connected with described isochronous controller, described waveform generator is connected with described unsteady flow generator with described ping-pong structure RAM module respectively, described isochronous controller is also connected with described ping-pong structure RAM module.
As the preferred implementation of above-described embodiment, described intelligent power module also comprises the analog to digital converter 402 being connected with the constant current drive end of described driving chip, and described constant current drive end voltage is converted to digital quantity by analog quantity.
Preferred implementation as above-described embodiment, the microcontroller 403 being connected with described analog to digital converter, for constant current drive end voltage and the predeterminated voltage of described digital quantity form are made comparisons, if described constant current drive end voltage is greater than predeterminated voltage, LED luminotron anode voltage control signal is turned down in output, if described constant current drive end voltage is less than predeterminated voltage, LED luminotron anode voltage control signal is heightened in output.
Preferred implementation as above-described embodiment, described intelligent power module also comprises respectively and straightens with described microcontroller 403 and direct current the digital regulation resistance 404 that stream transformer is connected, 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 straighten stream transformer regulation output and make to drive chip with the LED luminotron anode voltage of minimum power consumption work pattern.
Preferred implementation as above-described embodiment, described ping-pong structure RAM module is 16Kbit ping-pong structure RAM module, comprise column decode circuitry, array decoding circuit, table tennis control circuit and Bit Cell circuit, described Bit Cell is comprised of 6 pipe MOS, is a basic data storage cell.
As the preferred implementation of above-described embodiment, described decoding scheme and described array decoding circuit form the addressing circuit of Bit Cell jointly.
The present invention also provides a kind of LED display, and described LED display comprises LED display driving circuit described above.
Finally it should be noted that: above-described each embodiment, only for technical scheme of the present invention is described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record previous embodiment is modified, or to wherein partly or entirely technical characterictic be equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a LED display driving circuit, it is characterized in that: comprise the AC-DC module that alternating voltage is converted to DC voltage, the driving chip of the negative electrode of LED luminotron described in LED luminotron and constant current driving termination, described LED display driving circuit also comprises and being connected between described AC-DC module and the anode of LED luminotron, and the intelligent power module being connected with the constant current drive end of described driving chip, for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, and according to the constant current drive end voltage that drives chip, regulation output makes to drive chip with the LED luminotron anode voltage of minimum power consumption work pattern, wherein, described intelligent power module comprises that the direct current being connected between described AC-DC module and the anode of LED luminotron straightens stream transformer, for the DC voltage of described AC-DC module output is converted to LED luminotron anode voltage, described driving chip comprises shift register, ping-pong structure RAM module, instruction analysis device, configuration register, isochronous controller and unsteady flow generator, described shift register is connected with described ping-pong structure RAM module with described instruction analysis device respectively, described configuration register respectively with described instruction analysis device, described ping-pong structure RAM module is connected with described isochronous controller, described waveform generator is connected with described unsteady flow generator with described ping-pong structure RAM module respectively, described isochronous controller is also connected with described ping-pong structure RAM module.
2. LED display driving circuit according to claim 1, is characterized in that, described intelligent power module also comprises the analog to digital converter being connected with the constant current drive end of described driving chip, and described constant current drive end voltage is converted to digital quantity by analog quantity.
3. LED display driving circuit according to claim 1, it is characterized in that, the microcontroller being connected with described analog to digital converter, for constant current drive end voltage and the predeterminated voltage of described digital quantity form are made comparisons, if described constant current drive end voltage is greater than predeterminated voltage, LED luminotron anode voltage control signal is turned down in output, if described constant current drive end voltage is less than predeterminated voltage, LED luminotron anode voltage control signal is heightened in output.
4. LED display driving circuit according to claim 1, it is characterized in that, described intelligent power module also comprises respectively and straightens with described microcontroller and direct current the digital regulation resistance that stream transformer is connected, 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 straighten stream transformer regulation output and make to drive chip with the LED luminotron anode voltage of minimum power consumption work pattern.
5. LED display driving circuit according to claim 1, it is characterized in that, described ping-pong structure RAM module is 16Kbit ping-pong structure RAM module, comprise column decode circuitry, array decoding circuit, table tennis control circuit and Bit Cell circuit, described Bit Cell is comprised of 6 pipe MOS, is a basic data storage cell.
6. LED display driving circuit according to claim 5, is characterized in that, described decoding scheme and described array decoding circuit form the addressing circuit of Bit Cell jointly.
7. a LED display, is characterized in that, described LED display comprises the LED display driving circuit as described in claim 1-6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415040.2A CN104183218A (en) | 2014-08-21 | 2014-08-21 | LED display screen driving circuit and display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410415040.2A CN104183218A (en) | 2014-08-21 | 2014-08-21 | LED display screen driving circuit and display screen |
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| CN104183218A true CN104183218A (en) | 2014-12-03 |
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| CN201410415040.2A Pending CN104183218A (en) | 2014-08-21 | 2014-08-21 | LED display screen driving circuit and display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900183A (en) * | 2015-04-22 | 2015-09-09 | 深圳市巨能伟业技术有限公司 | Multi-current drive chip used for LED display drive |
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| CN102129834A (en) * | 2010-01-14 | 2011-07-20 | 深圳市奥拓电子股份有限公司 | LED (Light Emitting Diode) display screen and driving circuit thereof |
| CN102629863A (en) * | 2012-04-06 | 2012-08-08 | 开源集成电路(苏州)有限公司 | PWM (Pulse Width Modulation) circuit and LED drive circuit |
| CN202795995U (en) * | 2012-04-17 | 2013-03-13 | 广州硅芯电子科技有限公司 | High-performance LED display driving chip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20030081220A (en) * | 2003-08-30 | 2003-10-17 | 빛샘전자주식회사 | Driving control apparatus for controling light emitting diode display panel |
| CN1632849A (en) * | 2004-12-08 | 2005-06-29 | 南开大学 | Universal panel display controller and control method thereof |
| CN101883458A (en) * | 2009-05-07 | 2010-11-10 | 凌力尔特有限公司 | Be used for the method and system of the multi-channel LED driver of fast transient efficiently |
| EP2306441A1 (en) * | 2009-09-30 | 2011-04-06 | Macroblock, Inc. | Scan-type display device control circuit |
| CN102129834A (en) * | 2010-01-14 | 2011-07-20 | 深圳市奥拓电子股份有限公司 | LED (Light Emitting Diode) display screen and driving circuit thereof |
| CN102629863A (en) * | 2012-04-06 | 2012-08-08 | 开源集成电路(苏州)有限公司 | PWM (Pulse Width Modulation) circuit and LED drive circuit |
| CN202795995U (en) * | 2012-04-17 | 2013-03-13 | 广州硅芯电子科技有限公司 | High-performance LED display driving chip |
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| CN104900183A (en) * | 2015-04-22 | 2015-09-09 | 深圳市巨能伟业技术有限公司 | Multi-current drive chip used for LED display drive |
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