CN104050924B - LED drive chip and control method thereof and LED module - Google Patents
LED drive chip and control method thereof and LED module Download PDFInfo
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- CN104050924B CN104050924B CN201410300251.1A CN201410300251A CN104050924B CN 104050924 B CN104050924 B CN 104050924B CN 201410300251 A CN201410300251 A CN 201410300251A CN 104050924 B CN104050924 B CN 104050924B
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Abstract
This application discloses a kind of LED drive chip and control method thereof and LED module.Described LED drive chip has first to fourth side, and wherein the first and second sides are relative, and the third and fourth side is relative, and described LED drive chip includes: for the first pin of power supply, draw and adjacent with the 3rd side from the first side；For the second pin of ground connection, draw and adjacent with the 3rd side from the second side；For receiving the three-prong of serial input signals, from the first side and an extraction of the second side；And for providing multichannel to drive multiple driving pins of electric current to outside LED light array, wherein, described LED drive chip is configured to change described multichannel according to serial input signals and drives the corresponding relation of electric current and the plurality of driving pin.In LED module, by change LED drive chip pin be distributed, it is provided that install frame position, and can avoid module group unit power and ground connection wiring intersect with the holding wire in module group unit.
Description
Technical field
The present invention relates to technical field of LED display, relate more specifically to LED drive chip and
Control method and LED module.
Background technology
LED display is widely used for showing word and pattern.LED module is that composition LED shows
The critical piece of display screen, corresponding to one piece of viewing area of LED display.LED module is permissible
Used aloned, or multiple LED module is cascaded into one group successively.Comprise many at LED display
When group cascade LED module, display screen controls end can provide multi-way control signals, respectively
Control the cascade LED module of respective sets, thus show in the particular display area of LED display
Word and pattern.Utilize cascade LED module, extendible display unit can be formed.
Fig. 1 illustrates the structural representation of the LED module group unit 100 according to prior art.LED
Module group unit 100 includes printed circuit board (PCB) (PCB) 110, and the mould being arranged on PCB110
Group input interface 120, buffer unit 130, LED drive circuit 140, LED light array 150
With module output interface 160.Additionally, LED module group unit 100 can also include resistance, electric capacity
On discrete component and shell.
The module input interface 120 of LED module group unit 100 and module output interface 160 are for level
Connection so that serial data can be obtained from the control end of LED display.Described serial data includes
Data signal, control signal, also include when LED display system is scan screen system scanning signal.
LED drive circuit 140 for example, IC chip (IC), for driving coupled LED
Lamp array 150.
In one example, as in figure 2 it is shown, LED drive circuit 140 includes 16 pins,
Include the pin VDD for power supply respectively, for the pin GND of ground connection, for receiving serial
The pin DIN of data input, for providing pin DOUT that serial data exports, for providing
The pin SCAN0～3 of the drain signal output of 4 built-in PMOS and for offer 8
Paths of LEDs negative electrode drives the pin OUT0～7 of signal.Any one in pin SCAN0～3 and
A LED is connected between any one in pin OUT0～7.Therefore, use shown in Fig. 2
LED drive circuit 140, each LED module group unit 100 can drive 4*8 LED
Lamp.
Fig. 3 and 4 is shown respectively the structural representation of the LED module 200 and 300 according to prior art
Figure.LED module 200 and 300 includes multiple LED module group unit, each LED module respectively
The structure of unit is as it is shown in figure 1, include respective LED drive chip and corresponding LED respectively
Lamp array.
In the example shown in Fig. 3 and 4, LED module is included on public PCB formation
2n module group unit, wherein n is the integer more than or equal to 1.Therefore, use shown in Fig. 2
LED drive circuit 140, LED module can drive 4*8*2n LED.At LED module
In 200 and 300, module group unit is divided into first group of module group unit 11～1n of cascade and cascade
Second group of module group unit 21～2n.LED panel (not shown) provides two-way string to LED module
Row data signal.Input at the Din pad on the first serial data signal top in the drawings, via the
One group of module group unit 11～1n arrives the Dout pad of figure middle and upper part.Second serial data signal is at figure
Input at the Din pad of middle and lower part, arrive figure middle and lower part via second group of module group unit 21～2n
Dout pad.Utilize the module group unit of cascade, extendible display unit can be formed.
In the practical layout of PCB, all of wiring is distributed between LED.Such as,
The model that Fujian Hua Jie Photoelectric Co., Ltd. produces is the size of the outdoor monochromatic screen LED module of P10
Being 16 × 32 centimetres, pixel is 16 × 32, and the spacing between pixel is 1 centimetre.At PCB
On wiring need to utilize 1 centimetre of spacing between LED to complete.The power supply of LED module is total
The wiring of line make use of the spacing between upper and lower two groups of unit, the power supply of bus to each unit, ground
Wiring all make use of the horizontal spacing of adjacent two unit.
In actual applications, needing screen bigger for multiple modules composition, this is accomplished by installing frame,
And frame can take the spacing on module four limit.Therefore, the periphery at module is not suitable for arranging large area
Power supply and ground connection wiring.
In the LED module 200 shown in Fig. 3, rightmost side unit 1n, the power supply of unit 2n and
The wiring of ground connection is positioned at the right side of corresponding units, is unfavorable for the installation of frame.To this end, to module
The power supply of right sided cell, connect up and modify.In the LED module 300 shown in Fig. 4, will
The wiring of rightmost side unit 1n, the power supply of unit 2n and ground connection is arranged on the left side of corresponding units,
The module periphery making right side reserves, for the installation of frame.
But, in the LED module 300 shown in Fig. 4, module is passed through in the wiring of power supply and ground connection
Unit, result is powered and ground connection wiring intersects with a lot of holding wires within unit.Using monolayer
During PCB, needing to carry out substantial amounts of wire jumper and just can realize passing through module group unit, this is to PCB layout band
Difficulty and workload are come.When using double-deck or multi-layer PCB, need by via and additional
Aspect just can realize passing through module group unit, and this causes manufacturing cost to increase.
Summary of the invention
It is an object of the invention to provide one can change pin distribution easily and reduce wiring and intersect
LED drive chip and control method and LED module.
According to the first aspect of the invention, it is provided that a kind of LED drive chip, have first to fourth
Side, wherein the first and second sides are relative, and the third and fourth side is relative, and described LED drives
Chip includes: for the first pin of power supply, draw and adjacent with the 3rd side from the first side；
For the second pin of ground connection, draw and adjacent with the 3rd side from the second side；For receiving
The three-prong of serial input signals, from the first side and an extraction of the second side；And use
In providing multichannel to drive multiple driving pins of electric current to outside LED light array, wherein, described
LED drive chip is configured to change described multichannel according to serial input signals and drives electric current with described
The corresponding relation of multiple driving pins.
Preferably, described LED drive chip also includes: decoder module, enters serial input signals
Row decoding, to obtain data signal or control signal；Pattern arranges module, sets according to control signal
Put the mapping relations of outfan mapping block so that LED multi-path drives electric current to correspond respectively to specific
Driving pin；Signal generation module, produces LED multi-path according to data signal and drives electric current；Defeated
Go out to hold mapping block, LED multi-path drives electric current route to accordingly and drives pin.
Preferably, described LED drive chip is configured to switch between the first mode and the second mode,
In the flrst mode, described LED multi-path drives first group of LED drive current in electric current from the
The driving pin output of one side, second group of LED drive current is defeated from the driving pin of the second side
Go out, and under the second mode, described LED multi-path drives first group of LED in electric current to drive
The electric current driving pin output from the second side, second group of LED drive current driving from the first side
Dynamic pin output.
Preferably, described LED drive chip also includes for providing serial to next stage module group unit
4th pin of output signal, wherein, a three-prong extraction from the first and second sides,
Another extraction from the first and second sides of 4th pin.
Preferably, in described LED drive chip, according to three-prong and the signal of the 4th pin
Testing result, described three-prong is automatically configured to one in input pattern and output mode, institute
State that the 4th pin is automatically configured in input pattern and output mode another.
Preferably, in described LED drive chip, the plurality of driving pin includes multiple built-in
The drain signal output pin of field-effect transistor, and the negative electrode driving signal pin of multiple LED,
Each LED in described LED light array is connected to a drain signal output pin and
Individual negative electrode drives between signal pin.
According to the second aspect of the invention, it is provided that a kind of controlling party for above-mentioned LED drive chip
Method, including: serial input signals is decoded, to obtain data signal or control signal；Root
The mapping relations of outfan mapping block are set according to control signal so that LED multi-path drives electric current to divide
Dui Yingyu specifically not drive pin；Produce LED multi-path according to data signal and drive electric current；And
LED multi-path drives electric current route to accordingly and drives pin.
According to the third aspect of the invention we, it is provided that a kind of LED module, multiple including one group of cascade
Module group unit, each module group unit includes above-mentioned LED drive chip and corresponding LED battle array
Row, wherein, the LED drive chip in the plurality of module group unit is fixed on public printed circuit
On plate, the LED drive chip of at least one module group unit in the plurality of module group unit relative to
The LED drive chip of other module group units rotates places.
At least one module group unit preferably, in described module, in the plurality of module group unit
LED drive chip relative to other module group units LED drive chip revolve turnback.
Leftmost side module group unit phase preferably, in described module, in the plurality of module group unit
LED drive chip for other module group unit rotates placement
Rightmost side module group unit phase preferably, in described module, in the plurality of module group unit
LED drive chip for other module group unit rotates placement.
At least one module described preferably, in described module, in the plurality of module group unit
The LED drive chip of unit is configured to first mode, in the plurality of module group unit described other
The LED drive chip of module group unit is configured to the second pattern.
Preferably, in described module, the LED of each of the plurality of module group unit drives core
The power pin of sheet and ground pin are close to an adjacent module group unit, and utilize two phases
Horizontal spacing between adjacent module group unit, is formed for electrical wiring and ground connection wiring.
Preferably, described module also include at least another group cascade multiple module group units, described one
Multiple module group units of group cascade and multiple module group units of described at least another group cascade receive respectively
Different serial input datas.
Preferably, in described module, utilize multiple module group units and described of described one group of cascade
At least the vertical interval between multiple module group units of another group cascade, forms power bus and ground connection
Bus.
Preferably, in described module, the confession electrical wiring of the LED drive chip of each module group unit
It is connected respectively to power bus and earth bus with ground connection wiring.
Use the LED drive chip of the present invention, the driving pin of LED drive chip can be configured
Distribution, for power supply and ground connection wiring provide the motility in design.
In a preferred embodiment, the power pin of the LED drive chip of each module group unit and
Ground pin is close to an adjacent module group unit, and utilizes between two adjacent module group units
Horizontal spacing, formed for electrical wiring and ground connection wiring.Therefore, four sides of LED module can
The most not power and ground connection wiring, it is provided that install the position of frame.
The wiring of power supply and ground connection need not pass through module group unit, thus avoids power supply and ground connection to connect up
Intersect with the holding wire within unit.Even if using monolayer PCB, also have only to a small amount of wire jumper peace
Dress module group unit, thus reduce PCB layout difficulty.Further, owing to need not employing multilamellar
PCB, therefore reduces the manufacturing cost of LED module.
Accompanying drawing explanation
By description to the embodiment of the present invention referring to the drawings, the present invention above-mentioned and other
Objects, features and advantages will be apparent from, in the accompanying drawings:
Fig. 1 illustrates the schematic block diagram of the LED module group unit according to prior art.
Fig. 2 illustrates the pin distribution schematic diagram of the LED drive chip according to prior art.
Fig. 3 illustrates the schematic block diagram of an example of the LED module according to prior art.
Fig. 4 illustrates the schematic block diagram of another example of the LED module according to prior art.
Fig. 5 a and 5b is shown respectively the pipe in different modes of the LED drive chip according to the present invention
Foot distribution schematic diagram.
The LED drive chip that Fig. 6 a and 6b is shown respectively according to the present invention is arranged on PCB
Schematic wiring diagram.
Fig. 7 illustrates the schematic block diagram of the LED drive chip according to the present invention.
Fig. 8 illustrates the schematic block diagram of the LED module according to the present invention.
Detailed description of the invention
It is more fully described the present invention hereinafter with reference to accompanying drawing.In various figures, identical element
Similar reference is used to represent.For the sake of clarity, the various piece in accompanying drawing is not pressed
Ratio is drawn.Furthermore, it is possible to not shown part known to some.
Should be appreciated that when describing certain structure, when by one layer, a region is referred to as being positioned at another
When layer, another region " above " or " top ", can refer to be located immediately at another layer, another
Above individual region, or between floor, another region, also comprise other Ceng Huo district itself and another
Territory.Further, if this structure is overturn, this layer, region will be located in another layer, another
Individual region " below " or " lower section ".If being located immediately at another layer, another region to describe
Above scenario, will use " A is directly on B " or " A on B and therewith neighbour herein
Connect " form of presentation.
The present invention can present in a variety of manners, some of them example explained below.
As it has been described above, the wiring that it is an object of the invention to reduce LED component intersects, such that it is able to
Use monolayer PCB and reduce manufacturing cost.To this end, inventor devise can be defeated according to serial
Enter data and change the LED drive chip of pin distribution.
Fig. 5 a and 5b illustrates the pipe in different modes of the LED drive chip 440 according to the present invention
Foot distribution schematic diagram.In the flrst mode, according to LED drive chip 440 and the basis of the present invention
The number of pin of the LED drive circuit 140 of prior art is identical, as shown in Figure 5 a with distribution.
Under the second mode, the pin for power supply is maintained according to the LED drive chip 440 of the present invention
VDD, the pin sequence number of pin GND for ground connection, but change the pin sequence of other pins
Number.
Specifically, reassign under the second mode according to the LED drive chip 440 of the present invention
For receiving the pin DIN of serial date transfer, for the pin providing serial data to export
The pin that the pin sequence number of DOUT, the drain signal of 4 built-in PMOS of offer export
SCAN0～3 and the pipe of the pin OUT0～7 for offer 8 paths of LEDs negative electrodes driving signals
Foot sequence number.
In the flrst mode, the pin distribution of LED drive chip 440 is as shown in table 1:
Table 1
| Pin sequence number | Pin1 | Pin16 | Pin8 | Pin15 | Pin7 | Pin9 | Pin2 | Pin14 |
| Pin title | VDD | GND | DIN | DOUT | SCAN0 | SCAN1 | SCAN2 | SCAN3 |
| Pin sequence number | Pin4 | Pin5 | Pin3 | Pin6 | Pin13 | Pin10 | Pin12 | Pin11 |
| Pin title | OUT0 | OUT1 | OUT2 | OUT3 | OUT4 | OUT5 | OUT6 | OUT7 |
Under the second mode, the pin distribution of LED drive chip 440 is as shown in table 2:
Table 2
| Pin sequence number | Pin1 | Pin16 | Pin15 | Pin8 | Pin7 | Pin9 | Pin2 | Pin14 |
| Pin title | VDD | GND | DIN | DOUT | SCAN3 | SCAN2 | SCAN1 | SCAN0 |
| Pin sequence number | Pin4 | Pin5 | Pin3 | Pin6 | Pin13 | Pin10 | Pin12 | Pin11 |
| Pin title | OUT7 | OUT6 | OUT5 | OUT4 | OUT3 | OUT2 | OUT1 | OUT0 |
No matter at first mode or in the second pattern, in LED drive chip 440, pin
The position of VDD and GND is fixed, and pin sequence number is Pin1 and Pin16 respectively.LED drives core
Sheet 440 includes four sides.Pin VDD with GND is respectively from the first relative side of chip
Draw with the second side.This LED drive chip 440 also includes the 3rd relative side and the 4th side
Face, pin VDD and GND and the 3rd side are adjacent.
The LED drive chip 440 that Fig. 6 a and 6b is shown respectively according to the present invention is arranged on PCB
On schematic wiring diagram.
In Fig. 6 a, LED drive chip 440 is configured to first mode.In the flrst mode,
Wiring in the pin distribution of LED drive chip 440 and PCB is same as the prior art, wherein
The pin of LED drive chip 440 is distributed as shown in Figure 5 a.First side of chip is arranged upward.
Pin VDD draws from the upper right corner of chip, and pin GND draws from the lower right corner of chip, pin
DIN draws from the upper left corner of chip, and pin DOUT is adjacent with pin GND from the lower section of chip
Ground is drawn.
Wiring above first side of LED drive chip 440 provides for first group of 4*4
The pad of LED light array, the wiring below the second side provides for second group of 4*4LED lamp
The pad of array.Any one in pin SCAN0～3 and any one in pin OUT0～7
Between connect a LED.
The adjacent wiring in 3rd side of LED drive chip 440 be respectively used to for electrical wiring VDD,
Ground connection wiring GND and serial data output wiring Dout, the adjacent wiring in the 4th side is used for going here and there
Row data input wiring Din.Serial data output wiring Dout is for electrical wiring VDD and ground connection
Extend between wiring GND.Owing to pin VDD, GND and DOUT are adjacent to the 3rd side,
Pin DIN, adjacent to the 4th side, can avoid for electrical wiring VDD, ground connection in module group unit
Wiring GND, serial data output wiring Dout, serial date transfer wiring Din and other cloth
The intersection of line.
In figure 6b, LED drive chip 440 is configured to the second pattern.Under the second mode,
LED drive chip 440 pin distribution and PCB on wiring unlike the prior art, wherein
The pin of LED drive chip 440 is distributed as shown in Figure 5 b.Shown in Fig. 6 a, Fig. 6 b
The chip rotation turnback of LED drive chip 440 so that the first side of chip is arranged down.
Pin VDD draws from the lower left corner of chip, and pin GND draws from the upper left corner of chip, pin
DOUT draws from the lower right corner of chip, and pin DIN is adjacent with pin GND from the top of chip
Ground is drawn.
Owing to chip rotates, the wiring above the second side of LED drive chip 440 provides use
In the pad of first group of 4*4LED lamp array, the wiring below the first side provides for second
The pad of group 4*4LED lamp array.Any one in pin SCAN0～3 and pin OUT0～7
In any one between connect a LED.PCB layout shown in Fig. 6 b drives at LED
Above and below chip 440, pad and the wiring thereof of part are essentially identical with the appropriate section of Fig. 6 a.
But, the pin distribution of LED drive chip 440 changes, as shown in Figure 5 b.As a result, it is possible to
The pin utilizing chip the second side drives first group of 4*4LED lamp array, and utilizes chip
The pin of one side drives second group of 4*4LED lamp array.
The adjacent wiring in 3rd side of LED drive chip 440 be respectively used to for electrical wiring VDD,
Ground connection wiring GND and serial date transfer wiring Din, the adjacent wiring in the 4th side is used for going here and there
Row data output wiring Dout.Serial date transfer wiring Din is for electrical wiring VDD and ground connection
Extend between wiring GND.Owing to pin VDD, GND and DIN are adjacent to the 3rd side, pipe
Foot DOUT, adjacent to the 4th side, can avoid for electrical wiring VDD, ground connection in module group unit
Wiring GND, serial data output wiring Dout, serial date transfer wiring Din and other cloth
The intersection of line.
In the schematic wiring diagram of the LED drive chip shown in Fig. 6 b, owing to chip rotates, with
And the distribution of correspondingly configuration signal pin, can be for electrical wiring VDD and ground connection wiring GND
Relative opposite side is moved on to from the side of module group unit.The LED drive chip of each module group unit
Pin VDD, GND foot be close to an adjacent module group unit, such that it is able to utilize two
Horizontal spacing between adjacent module group unit, is formed for electrical wiring VDD and ground connection wiring GND.
And, the LED light array of all unit in LED module and control signal thereof can keep right
The ranks relation answered, from the control signal without change display screen control end, just can realize
Really display word and pattern.
Fig. 7 illustrates the schematic block diagram of the LED drive chip 440 according to the present invention.LED drives
Dynamic chip 440 receives serial input signals from the pin DIO of chip.Decoder module 441 is to serial
Input signal is decoded.
If serial input signals is data signal, then this data signal is provided to signal generation mould
Block 442.Signal generation module 442 produces the driving electric current of LED according to data signal, by 4
The drain signal of built-in PMOS provides to pin via drain output mapping block 445
8 paths of LEDs negative electrodes are driven signal to carry via cathode end mapping block 446 by SCAN0～3
It is supplied to pin OUT0～7.In any one in pin SCAN0～3 and pin OUT0～7
A LED is connected between any one.Thus, LED drive chip 440 can control 4*8
The lighting and extinguish of individual LED.
If serial input signals is control signal, then this control signal is provided to drain output
Pattern arranges module 443 and drive output pattern arranges module 444.Drain output pattern sets
Put module 443 and drive output pattern arranges whether module 444 determines whether this control signal
For mode configuration signals.If this control signal is mode configuration signals, then drain output pattern
Module 443 is set drain output mapping block 445 is set according to mode configuration signals so that letter
4 tunnel drain signal of number generation module 442 output and the corresponding relation of chip pin.Meanwhile, drive
Dynamic outfan pattern arranges module 444 and arranges cathode end mapping block according to mode configuration signals
446 so that 8 paths of LEDs negative electrodes of signal generation module 442 output drive signal and chip pin
Corresponding relation.
Therefore, the LED drive chip 440 according to the present invention can be according at serial input data
The control signal that pin DIN receives changes the pin distribution of chip.
In a preferred embodiment, it is also possible to automatically configure serial date transfer/output pin further,
For example, see the most authorized patent of invention " LED display system " of the present inventor (patent No.:
ZL 201010194273.6) disclosed in LED display system in cell board circuit.
Fig. 8 illustrates the structural representation of the LED module 400 according to the present invention.LED module 400
Include multiple LED module group unit respectively, the structure of each LED module group unit as it is shown in figure 1,
Include respective LED drive chip and corresponding LED light array respectively.
In the example shown in Fig. 8, LED module is included on public PCB 2n formed
Module group unit, wherein n is the integer more than or equal to 1.Therefore, the LED shown in Fig. 5 is used to drive
Dynamic chip 440, LED module can drive 4*8*2n LED.In LED module 400,
Module group unit is divided into first group of module group unit 11～1n of cascade and second group of module group unit of cascade
21～2n.Display screen controls the LED panel (not shown) of end provides two-way string to LED module
Row data signal.Input at the Din pad on the first serial data signal top in the drawings, via the
One group of module group unit 11～1n arrives the Dout pad of figure middle and upper part.Second serial data signal is at figure
Input at the Din pad of middle and lower part, arrive figure middle and lower part via second group of module group unit 21～2n
Dout pad.Utilize the module group unit of cascade, extendible display unit can be formed.
Further, in the example shown in Fig. 8, first group of module group unit is positioned at the 1n-1 in left side
Individual unit and second group of module group unit are positioned in 2～2n-1 the unit in left side, respective LED
Driving chip 440 is configured to first mode, and the wiring of power supply and ground connection is positioned at the right side of respective unit.
Rightmost side unit 1n in first group of module group unit and the rightmost side in second group of module group unit are single
In unit 2n, respective LED drive chip 440 is configured to the second pattern, power supply and the cloth of ground connection
Line is positioned at the left side of respective unit.
Therefore, four sides of LED module 400 are not the most powered and ground connection connects up, it is provided that peace
The position of rim frame.In the LED module 400 shown in Fig. 8, the wiring of power supply and ground connection is not required to
Module group unit to be passed through, thus avoid power supply and ground connection wiring to intersect with the holding wire within unit.
Even if using monolayer PCB, also having only to a small amount of wire jumper and module group unit is installed, thus reducing PCB
Wiring difficulty.Further, owing to need not use multi-layer PCB, LED module is therefore reduced
Manufacturing cost.
In the above description, known structural element and step are not described in detail.
It should be appreciated to those skilled in the art that can realize corresponding by various technological means
Structural element and step.It addition, in order to form identical structural element, those skilled in the art are also
Can be designed that method the most identical with process as described above.Although it addition, more than
Respectively describe each embodiment, but it is not intended that the measure in each embodiment can not be favourable
Be used in combination.
Above embodiments of the invention are described.But, these embodiments are only used to
Descriptive purpose, and be not intended to limit the scope of the present invention.The scope of the present invention is by appended right
Require and equivalent limits.Without departing from the scope of the present invention, those skilled in the art can make
Multiple replacement and amendment, these substitute and amendment all should fall within the scope of the present invention.
Claims (16)
1. a LED drive chip, has first to fourth side, wherein the first and second sides
Face is relative, and the third and fourth side is relative, and described LED drive chip includes:
For the first pin of power supply, draw and adjacent with the 3rd side from the first side；
For the second pin of ground connection, draw and adjacent with the 3rd side from the second side；
For receiving the three-prong of serial input signals, from the first side and one of the second side
Draw；And
For providing multichannel to drive multiple driving pins of electric current to outside LED light array,
Wherein, described LED drive chip is configured to drive according to the described multichannel of serial input signals change
Streaming current and the corresponding relation of the plurality of driving pin.
LED drive chip the most according to claim 1, also includes:
Decoder module, is decoded serial input signals, to obtain data signal or control signal；
Pattern arranges module, arranges the mapping relations of outfan mapping block according to control signal, makes
Obtaining LED multi-path drives electric current to correspond respectively to specifically drive pin；
Signal generation module, produces LED multi-path according to data signal and drives electric current；
Outfan mapping block, drives LED multi-path electric current to route to accordingly and drives pin.
LED drive chip the most according to claim 2, wherein, described LED drives core
Sheet is configured to switch between the first mode and the second mode,
In the flrst mode, first group of LED drive current during described LED multi-path drives electric current
Driving pin output from the first side, second group of LED drive current is from the driving pipe of the second side
Foot exports, and
Under the second mode, first group of LED drive current during described LED multi-path drives electric current
Driving pin output from the second side, second group of LED drive current is from the driving pipe of the first side
Foot exports.
LED drive chip the most according to claim 2, also includes for next stage mould
Group unit provides the 4th pin of serial output signal,
Wherein, a three-prong extraction from the first and second sides, the 4th pin is from first
With another extraction in the second side.
LED drive chip the most according to claim 4, wherein according to three-prong and
The signal detecting result of four pins, described three-prong is automatically configured to input pattern and output mode
In one, described 4th pin be automatically configured in input pattern and output mode another.
LED drive chip the most according to claim 1, wherein said multiple driving pins
Including the drain signal output pin of multiple built-in field effect transistors, and the negative electrode of multiple LED
Driving signal pin, each LED in described LED light array is connected to a drain electrode letter
Number output pin and a negative electrode drive between signal pin.
7. one kind is used for LED drive chip according to any one of claim 1 to 6
Control method, including:
Serial input signals is decoded, to obtain data signal or control signal；
The mapping relations of outfan mapping block are set according to control signal so that LED multi-path drives
Electric current corresponds respectively to specifically drive pin；
Produce LED multi-path according to data signal and drive electric current；And
LED multi-path drives electric current route to accordingly and drives pin.
8. a LED module, including multiple module group units of one group of cascade, each module group unit
Including LED drive chip according to any one of claim 1 to 6 and corresponding LED
Lamp array,
Wherein, the LED drive chip in the plurality of module group unit is fixed on public printed circuit
On plate,
The LED drive chip of at least one module group unit in the plurality of module group unit relative to
The LED drive chip of other module group units rotates places.
LED module the most according to claim 8, in wherein said multiple module group units
The LED drive chip of at least one module group unit drives core relative to the LED of other module group units
Sheet rotation turnback.
LED module the most according to claim 8, in wherein said multiple module group units
Leftmost side module group unit rotates relative to the LED drive chip of other module group unit to be placed.
11. LED modules according to claim 8, in wherein said multiple module group units
Rightmost side module group unit rotates relative to the LED drive chip of other module group unit to be placed.
12. LED modules according to claim 8, in wherein said multiple module group units
The LED drive chip of at least one module group unit described is configured to first mode, the plurality of module
The LED drive chip of other module group units described in unit is configured to the second pattern.
13. LED modules according to claim 12, wherein said multiple module group units
The power pin of the LED drive chip of each and ground pin are close to an adjacent module
Unit, and utilize the horizontal spacing between two adjacent module group units, formed for electrical wiring and connect
Ground wiring.
14. LED modules according to claim 8, also include that at least another group cascade is many
Individual module group unit, multiple module group units and described at least another group cascade of described one group of cascade are many
Individual module group unit receives different serial input datas respectively.
15. LED modules according to claim 14, wherein utilize described one group of cascade
Vertical interval between multiple module group units of multiple module group units and described at least another group cascade,
Form power bus and earth bus.
16. LED modules according to claim 15, the LED of the most each module group unit
Connecting up for electrical wiring and ground connection of driving chip is connected respectively to power bus and earth bus.
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| CN112466249A (en) * | 2020-12-17 | 2021-03-09 | 北京集创北方科技股份有限公司 | LED drive circuit |
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| CN101262729B (en) * | 2008-04-11 | 2010-05-12 | 深圳市联德合微电子有限公司 | A LED constant current driving circuit |
| CN100555617C (en) * | 2008-05-04 | 2009-10-28 | 北京巨数数字技术开发有限公司 | The chip for driving of a kind of LED |
| CN201307949Y (en) * | 2008-10-22 | 2009-09-09 | 北京巨数数字技术开发有限公司 | Single-wire serial transmission drive chip and application circuit |
| CN201374173Y (en) * | 2009-01-07 | 2009-12-30 | 北京巨数数字技术开发有限公司 | Constant current driving chip |
| CN201765800U (en) * | 2010-08-12 | 2011-03-16 | 海信（山东）空调有限公司 | Display screen driving circuit |
| CN103761942B (en) * | 2014-02-14 | 2015-09-30 | 福州福大海矽微电子有限公司 | The numeral method of tool array display multiplexing algorithm and key control chip |
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Effective date of registration: 20170808 Address after: 310012 Hangzhou, Zhejiang Province, Gushan Road, No. 4, No. Co-patentee after: CHANNEL CAILIANG(ZHANGZHOU) OPTICAL CO., LTD. Patentee after: Hangzhou Shilan Microelectronics Co., Ltd. Address before: 310012 Hangzhou, Zhejiang Province, Gushan Road, No. 4, No. Co-patentee before: Fujian Hua Jie Photoelectric Co., Ltd. Patentee before: Hangzhou Shilan Microelectronics Co., Ltd. |