CN107134252A - A kind of LED display driving structure and driving method - Google Patents
A kind of LED display driving structure and driving method Download PDFInfo
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- CN107134252A CN107134252A CN201710526654.1A CN201710526654A CN107134252A CN 107134252 A CN107134252 A CN 107134252A CN 201710526654 A CN201710526654 A CN 201710526654A CN 107134252 A CN107134252 A CN 107134252A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
The invention discloses a kind of LED display driving structure and driving method, belong to LED display technical field.The LED display driving structure includes the LED lamp bead of some matrix arrangements, line driving array module, column line drive array module, power end and earth terminal, column line drive array module is electrically connected with power end, line driving array module is electrically connected with earth terminal, column line drive array module includes some constant-current driven chips, the positive pole of each LED lamp bead is electrically connected with a constant-current driven chip, and negative pole and the line driving array module of each LED lamp bead are electrically connected with.The LED display driving structure and driving method of the present invention, it can substantially reduce the screen body input voltage of LED display, so as to bring more preferable energy-saving effect on the premise of LED display steady operation is ensured, and by the setting of energy-saving standby mode, can further reduce the energy consumption of LED display.
Description
Technical field
The present invention relates to LED display technical field, more particularly to a kind of LED display driving structure and driving method.
Background technology
As shown in Figures 1 and 2, traditional LED display driving structure 100 includes the LED lamp bead of some matrix arrangements
110th, line driving array module 120, column line drive array module 130, line driving array module 120 and power end VINCarry out
It is electrically connected with, column line drive array module 130 is electrically connected with earth terminal GND, if column line drive array module 130 includes
Dry constant-current driven chip 131, positive pole and the line driving array module 120 of each LED lamp bead 110 are electrically connected with, each
The negative pole of LED lamp bead 110 is electrically connected with a constant-current driven chip 131.
So, as shown in Fig. 2 screen body input voltage VIN=VF+VDS+VDrop。
It is as shown in the table
Required according to LED lamp bead specifications parameter：1.6V≤VF≤ 3.6V, the requirement of LED drive chip specifications parameter：0.6V≤
VDS≤ 1.0V, and the line that generally LED display industry is selected are driven to metal-oxide-semiconductor, operating pressure drop：0.1V≤VDrop≤
0.2V, therefore, using the input voltage V of the display screen body of traditional LED display driving structureIN=3.6+1+0.2=4.8V,
Because the LED of traditional display screen powers provided by line driving array module 120, although therefore red VF-RED≤ 2.4V,
But traditional display screen is difficult separated is powered.Thus, for ensure LED display can steady operation, all adopt substantially in industry
Unified power supply is carried out with direct current 5V or so Switching Power Supply.
The content of the invention
It is a primary object of the present invention to propose a kind of LED display driving structure and driving method, it can ensure LED
On the premise of display screen steady operation, the screen body input voltage of LED display is substantially reduced, so as to bring preferably energy-conservation effect
Really.
To achieve the above object, a kind of LED display driving structure that the present invention is provided, the LED display driving knot
Structure includes the LED lamp bead of some matrix arrangements, line driving array module, column line drive array module, power end and ground connection
End, the column line drive array module is electrically connected with the power end, and the line driving array module connects with described
Ground terminal is electrically connected with, and the column line drive array module includes some constant-current driven chips, and each LED lamp bead is just
Pole is electrically connected with constant-current driven chip described in one, and negative pole and the line of each LED lamp bead drive array mould
Block is electrically connected with.
Alternatively, the positive pole of some LED lamp beads of same row carries out electrical with the same constant-current driven chip
Connection.
Alternatively, each constant-current driven chip includes some constant current output passages, some LEDs of same row
The positive pole of pearl is electrically connected with the same constant current output passage.
Alternatively, the line driving array module includes some metal-oxide-semiconductor row driving switch, with some described of a line
The negative pole of LED lamp bead is electrically connected with the same metal-oxide-semiconductor row driving switch.
Alternatively, the constant-current driven chip includes input signal detection unit, for detecting the constant current driving in real time
The input signal of chip.
In addition, to achieve the above object, the present invention also proposes a kind of LED display driving method, the LED display drives
Dynamic method comprises the following steps：There is provided by some constant-current driven chips of column line drive array module for each LED lamp bead
Driving current and driving voltage.
Alternatively, the same constant-current driven chip provides driving current and drive to some LED lamp beads of same row
Dynamic voltage.
Alternatively, the LED display driving method is further comprising the steps of：Detect each constant-current driven chip
Input signal, to acquire the present displayed content of LED display；According to the present displayed content, control respectively each
The working condition of the constant-current driven chip, to enter energy-saving standby mode.
Alternatively, the constant-current driven chip includes input signal detection unit, passes through the input signal detection unit
The input signal of the constant-current driven chip is detected in real time.
Alternatively, it is described according to the present displayed content, the work shape of each constant-current driven chip is controlled respectively
State, is included with entering the step of energy-saving standby mode：When the present displayed content has a large amount of blank screen contents, blank screen is controlled
The working condition of each constant-current driven chip of content respective regions is in standby closed mode.
LED display driving structure and driving method that the present invention is provided, the positive pole of its each LED lamp bead and a constant current are driven
Dynamic chip is electrically connected with, and negative pole and the line driving array module of each LED lamp bead are electrically connected with.So,
Because this LED display driving structure is to use constant-current driven chip to be powered for each LED lamp bead, its screen body input electricity
Press VIN=VF+VDrop=3.6+0.2=3.8V, consequently, it is possible to use direct current 5V or so Switching Power Supply with traditional LED display
Carry out unified power supply to compare, it can substantially reduce the screen body of LED display on the premise of LED display steady operation is ensured
Input voltage, so as to bring more preferable energy-saving effect.Simultaneously as it uses constant-current driven chip to provide voltage to LED lamp bead,
Therefore 2.4V operating voltage, i.e. V individually can be provided to red LED lamp beadIN- RED=VF+VDrop=2.4+0.2=2.6V,
Further to improve energy-saving effect.In addition, it detects corresponding constant-current driven chip in real time by input signal detection unit
Input signal, to control the working condition of each constant-current driven chip respectively, feeds them into energy-saving standby mode, further to drop
The energy consumption of low LED display.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of prior art LED display driving structure.
Fig. 2 be LED display driving structure shown in Fig. 1 in LED lamp bead power supply the principle figure.
Fig. 3 is the circuit theory diagrams of first embodiment of the invention LED display driving structure.
Fig. 4 be LED display driving structure shown in Fig. 3 in LED lamp bead power supply the principle figure.
Fig. 5 is the FB(flow block) of second embodiment of the invention LED display driving method.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.Herein it should be noted that for
The explanation of these embodiments is used to help understand the present invention, but does not constitute limitation of the invention.In addition, disclosed below
As long as each of the invention embodiment in involved technical characteristic do not constitute conflict each other and can just be mutually combined.
As shown in Figure 3, Figure 4, first embodiment of the invention provides a kind of LED display driving structure 200, and the LED is shown
Shielding driving structure 200 includes the LED lamp bead 210 of some matrix arrangements, line driving array module 220, column line drive array mould
Block 230, power end VINAnd earth terminal GND, column line drive array module 230 and power end VINIt is electrically connected with, line drives
Dynamic array module 220 and earth terminal GND is electrically connected with, and column line drive array module 230 includes some constant-current driven chips
231, the positive pole of each LED lamp bead 210 is electrically connected with a constant-current driven chip 231, the negative pole of each LED lamp bead 210
It is electrically connected with line driving array module 220.
In the present embodiment, because some LED lamp beads of same row should be driven by same constant-current driven chip 231,
Thus, the positive pole of some LED lamp beads 210 of same row is electrically connected with same constant-current driven chip 231.Specifically,
Each constant-current driven chip 231 includes some constant current output passages (not shown), the positive pole of some LED lamp beads 210 of same row
It is electrically connected with same constant current output passage.Likewise, line drives array module 220 to be driven including some metal-oxide-semiconductor rows
Dynamic switch (not shown), the negative pole with some LED lamp beads 1 of a line is electrically connected with same metal-oxide-semiconductor row driving switch.
So, as shown in figure 4, screen body input voltage VIN=VF+VDrop。
It is as shown in the table
Required according to LED lamp bead specifications parameter：1.6V≤VF≤ 3.6V, and the line driving use of array module 220
It is metal-oxide-semiconductor row driving switch, operating pressure drop：0.1V≤VDrop≤ 0.2V, thus, using the screen of LED display driving structure 200
Body input voltage VIN=3.6+0.2=3.8V, consequently, it is possible to use direct current 5V or so Switching Power Supply with traditional LED display
Carry out unified power supply to compare, it can substantially reduce the screen body of LED display on the premise of LED display steady operation is ensured
Input voltage.Simultaneously as it uses constant-current driven chip 231 to provide voltage to LED lamp bead 210, therefore can be individually to red
Color LED lamp bead 210 provides 2.4V operating voltage, i.e. VIN-RED=2.4+0.2=2.6V, further to reduce its input voltage.
Simultaneously as being reduced in the case that the brightness of display screen LED lamp bead is directly proportional in working range with electric current, therefore electric current is constant
Shield the brightness that body input voltage can still be maintained like, in addition power P=U*I, power consumption and voltage direct proportionality, reduction
Voltage can directly reduce power consumption in proportion, thus, more preferable energy-saving effect can be brought.
In addition, each constant-current driven chip 231 also includes input signal detection unit (not shown), for detecting permanent in real time
Flow the input signal of driving chip 231.The defeated of corresponding constant-current driven chip 231 is detected by input signal detection unit in real time
Enter signal, the present displayed content of LED display can be acquired.So, when the present displayed content is in the presence of a large amount of black
When shielding content, the constant-current driven chip 231 of blank screen content respective regions will intelligently turn off all outputs, only retain idle function
(i.e. LED display enters energy-saving standby mode), so as to greatly reduce the power consumption of display screen.
Because under general black state, the exemplary operation electric current that conventional constant-current driven chip needs is Idd ≈ 10mA,
After energy-saving standby mode is enabled, the exemplary operation electric current under the holding state of this constant-current driven chip 231 is I dd ≈ 2mA, when
Using constant-current driven chip more than 231, energy-saving effect is more obvious, such as LED display industry P1.2, uses constant-current driven chip
231 quantity about 4.6K/ ㎡, conventional power consumption is about 4600X5X0.01 ≈ 230W, and the power consumption after energy-saving standby mode is enabled is big
About 4600X3.8X0.002 ≈ 35W, thus, with the quantity increase of the constant-current driven chip 231 used, power consumption is substantially reduced,
Power savings advantages are obvious all the more.
As shown in figure 5, second embodiment of the invention provides a kind of LED display driving method, the LED display driving side
Method comprises the following steps：
Step S1：By some constant-current driven chips of column line drive array module driving is provided for each LED lamp bead
Electric current and driving voltage.
Specifically, as shown in Figures 3 and 4, the LED display driving structure 200 includes the LED lamp bead of some matrix arrangements
210th, line driving array module 220, column line drive array module 230, power end VINAnd earth terminal GND, column line drive battle array
Row module 230 and power end VINIt is electrically connected with, line driving array module 220 and earth terminal GND is electrically connected with, and is arranged
Line driving array module 230 includes some constant-current driven chips 231, the positive pole and a constant-current driven chip of each LED lamp bead 210
231 are electrically connected with, and negative pole and the line driving array module 220 of each LED lamp bead 210 are electrically connected with.Such one
Come, just can provide driving by some constant-current driven chips 231 of column line drive array module 230 for each LED lamp bead 210
Electric current and driving voltage.Further, since some LED lamp beads of same row should be driven by same constant-current driven chip 231, because
This, same constant-current driven chip 231 provides driving current and driving voltage to some LED lamp beads 210 of same row.
As shown in figure 4, screen body input voltage VIN=VF+VDrop.Required according to LED lamp bead specifications parameter：1.6V≤VF≤
3.6V, and line driving array module 220 use metal-oxide-semiconductor row driving switch, operating pressure drop：0.1V≤VDrop≤
0.2V, thus, using the screen body input voltage V of the LED display driving methodIN=3.6+0.2=3.8V, consequently, it is possible to
Traditional LED display carries out unified power supply using direct current 5V or so Switching Power Supply and compared, and it can ensure that LED display is stable
On the premise of work, the screen body input voltage of LED display is substantially reduced.Simultaneously as it uses constant-current driven chip 231 to carry
Each LED lamp bead 210 is given for driving voltage and driving current, therefore 2.4V work individually can be provided to red LED lamp bead 210
Make voltage, i.e. VIN-RED=2.4+0.2=2.6V, further to reduce its input voltage.Simultaneously as display screen LED lamp bead
Reduction screen body input voltage can still be kept in the case that brightness is directly proportional in working range with electric current, therefore electric current is constant
Same brightness, in addition power P=U*I, power consumption and voltage direct proportionality, reduction voltage can directly reduce work(in proportion
Consumption, thus, more preferable energy-saving effect can be brought.
Step S2：The input signal of each constant-current driven chip is detected, in the current display to acquire LED display
Hold；
Specifically, constant-current driven chip 231 includes input signal detection unit, real-time by the input signal detection unit
Detect the input signal of constant-current driven chip 231.Because the change of the present displayed content of LED display can cause each constant current
The change of the input signal of driving chip, thus, by the input signal detection unit of each constant-current driven chip to corresponding
The input signal of constant-current driven chip is detected, can acquire the present displayed content of LED display.
Step S3：According to the present displayed content, the working condition of each constant-current driven chip is controlled respectively, is saved with entering
Can standby mode.
Specifically, during the daily display of LED display, there is substantial amounts of blank screen content sometimes, now, if black
Shield each constant-current driven chips of content respective regions still in very big energy consumption under normal operating conditions, then can be caused to waste.
So, when there is a large amount of blank screen contents in present displayed content, each constant current driving of control blank screen content respective regions
The working condition of chip is in standby closed mode.So, it is black when the present displayed content has a large amount of blank screen contents
The constant-current driven chip of screen content respective regions will intelligently turn off all outputs, and only retaining idle function, (i.e. LED display enters
Enter energy-saving standby mode), so as to greatly reduce the power consumption of display screen.
LED display driving structure and driving method in the present invention, the positive pole of its each LED lamp bead and a constant current drive
Chip is electrically connected with, and negative pole and the line driving array module of each LED lamp bead are electrically connected with.So, by
It is to use constant-current driven chip to be powered for each LED lamp bead in this LED display driving structure, its screen body input voltage
VIN=VF+VDrop=3.6+0.2=3.8V, consequently, it is possible to be entered with traditional LED display using direct current 5V or so Switching Power Supply
The unified power supply of row is compared, and it can be on the premise of LED display steady operation be ensured, the screen body for substantially reducing LED display is defeated
Enter voltage, so as to bring more preferable energy-saving effect.Simultaneously as it uses constant-current driven chip to provide voltage to LED lamp bead, because
This can individually provide 2.4V operating voltage, i.e. V to red LED lamp beadIN-RED=VF+VDrop=2.4+0.2=2.6V, to enter
One step improves energy-saving effect.In addition, it detects the input of corresponding constant-current driven chip by input signal detection unit in real time
Signal, to control the working condition of each constant-current driven chip respectively, feeds them into energy-saving standby mode, further to reduce
The energy consumption of LED display.
Embodiments of the present invention are explained in detail above in association with accompanying drawing, but the invention is not restricted to described implementation
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen within protection scope of the present invention.
Claims (10)
1. a kind of LED display driving structure, it is characterised in that the LED display driving structure includes some matrix arrangements
LED lamp bead, line driving array module, column line drive array module, power end and earth terminal, the column line drive array
Module is electrically connected with the power end, and the line driving array module is electrically connected with the earth terminal, institute
Stating column line drive array module includes some constant-current driven chips, and constant current described in the positive pole and one of each LED lamp bead drives
Chip is electrically connected with, and negative pole and the line driving array module of each LED lamp bead are electrically connected with.
2. LED display driving structure according to claim 1, it is characterised in that some LED lamp beads of same row
Positive pole be electrically connected with the same constant-current driven chip.
3. LED display driving structure according to claim 1, it is characterised in that each constant-current driven chip bag
Some constant current output passages are included, the positive pole of some LED lamp beads of same row is carried out with the same constant current output passage
It is electrically connected with.
4. LED display driving structure according to claim 1, it is characterised in that the line drives array module bag
Some metal-oxide-semiconductor row driving switch are included, the negative pole with some LED lamp beads of a line is opened with the same metal-oxide-semiconductor row driving
Put capable electric connection into.
5. according to any described LED display driving structures of claim 1-4, it is characterised in that the constant-current driven chip
Including input signal detection unit, the input signal for detecting the constant-current driven chip in real time.
6. a kind of LED display driving method, it is characterised in that the LED display driving method comprises the following steps：
By some constant-current driven chips of column line drive array module driving current and driving electricity are provided for each LED lamp bead
Pressure.
7. LED display driving method according to claim 6, it is characterised in that the same constant-current driven chip to
Some LED lamp beads of same row provide driving current and driving voltage.
8. LED display driving method according to claim 6, it is characterised in that the LED display driving method is also
Comprise the following steps：
The input signal of each constant-current driven chip is detected, to acquire the present displayed content of LED display；
According to the present displayed content, the working condition of each constant-current driven chip is controlled respectively, to be treated into energy-conservation
Machine pattern.
9. LED display driving method according to claim 8, it is characterised in that the constant-current driven chip includes defeated
Enter detecting signal unit, detect the input signal of the constant-current driven chip in real time by the input signal detection unit.
10. LED display driving method according to claim 8, it is characterised in that described according in the current display
Hold, the working condition of each constant-current driven chip is controlled respectively, included with entering the step of energy-saving standby mode：
When the present displayed content has a large amount of blank screen contents, each constant current of control blank screen content respective regions is driven
The working condition of dynamic chip is in standby closed mode.
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| CN201710526654.1A CN107134252A (en) | 2017-06-30 | 2017-06-30 | A kind of LED display driving structure and driving method |
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| CN108417176A (en) * | 2018-05-10 | 2018-08-17 | 厦门强力巨彩光电科技有限公司 | A kind of LED lamp bead driving circuit and LED drive system |
| CN108541108A (en) * | 2018-05-10 | 2018-09-14 | 厦门强力巨彩光电科技有限公司 | A kind of LED lamp bead encapsulating structure and LED display |
| WO2020253213A1 (en) * | 2019-06-21 | 2020-12-24 | 深圳市洲明科技股份有限公司 | Display screen dynamic control system and display screen |
| CN112419961A (en) * | 2019-08-20 | 2021-02-26 | 深圳市洲明科技股份有限公司 | Voltage-regulating energy-saving circuit and LED display module |
| CN112466248A (en) * | 2020-11-13 | 2021-03-09 | 厦门强力巨彩光电科技有限公司 | LED drive circuit and LED display screen |
| CN115631714A (en) * | 2022-09-21 | 2023-01-20 | 常州市创联电源科技股份有限公司 | Intelligent voltage-regulating power supply method and device suitable for LED display screen |
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| CN112419961A (en) * | 2019-08-20 | 2021-02-26 | 深圳市洲明科技股份有限公司 | Voltage-regulating energy-saving circuit and LED display module |
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| CN115631714A (en) * | 2022-09-21 | 2023-01-20 | 常州市创联电源科技股份有限公司 | Intelligent voltage-regulating power supply method and device suitable for LED display screen |
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