CN208477891U - A kind of LED display and LED display system - Google Patents
A kind of LED display and LED display system Download PDFInfo
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- CN208477891U CN208477891U CN201821091222.9U CN201821091222U CN208477891U CN 208477891 U CN208477891 U CN 208477891U CN 201821091222 U CN201821091222 U CN 201821091222U CN 208477891 U CN208477891 U CN 208477891U
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Abstract
The utility model discloses a kind of LED displays, comprising: the M*N LED light being arranged in a matrix pattern；Each LED light includes red LED, green LED, at least two LED in blue led；The male/female pole connection of the LED light of every row is at one end；The red LED of the LED light of each column, green LED, blue led the connection of Yin/Yang pole at one end.A kind of LED display system is also disclosed, further includes the first power supply and the first driving circuit in addition to including above-mentioned LED display, second source and the second driving circuit；First power supply drives red LED by the first driving circuit；Second source drives green LED and/or blue led by the second driving circuit.In such a way that matrix is integrated and two groups of different voltages are powered, reduces pin, increase wiring space, shortens PCB and hand over the phase；The fever and decaying for reducing red LED driving circuit, improve stability, have good economic and social benefit.
Description
Technical field
The utility model relates to field of display screen, in particular to a kind of LED display integrated using matrix and LED are shown
System.
Background technique
At present in LED display product, generally existing two problems.On the one hand, the spacing between lamp and lamp is presented more next
Smaller trend, so that the lamp density on LED unit area is higher and higher.As shown in Figure 1, being LED display in the prior art
3*3 routing model schematic diagram, including 9 LED light, each LED light includes R, G, B (red, green, blue) three in parallel
LED.Each LED light has 4 Pin feet (being public pole, R, G, B respectively), i.e., 9 LED light need 9*4=36 Pin foot to be both needed to
The Pin foot of itself and driving IC are connected using via hole.Space narrow is needed using spy so that PCB layout is extremely difficult
Different technique production, leads to high production cost and hands over the phase long.On the other hand, current LED driving method is generally electric current from power supply
Anode drives IC to flow to power cathode by PMOS tube, LED, constant current.Due to PMOS tube both end voltage Vmos, LED both end voltage
Vled is fixed forward conduction voltage, and wherein the forward conduction voltage value of red LED is lower, so under identical power voltage supply,
The constant current driving IC for the voltage Vds meeting BELAND green LED that the constant current driving IC of red LED is born is higher, leads to the perseverance of red LED
Stream driving IC fever is more serious, and red LED produces local pastiness phenomenon because local temperature difference is larger.If being used for a long time, reliably
Property, there are problems for stability.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of the utility model is to provide a kind of LED displays and LED display system
System: it is integrated in a manner of matrix by N*N LED light, reduces pin, increase wiring space；And pass through two groups of power supplys
Different voltage is provided to red LED, green LED and/or blue led respectively, to reduce the electricity on red LED driving circuit
Pressure reduces fever.
The technical scheme adopted by the utility model is a kind of LED display, comprising:
M*N LED light, the M*N LED light are arranged with the matrix pattern that M row N is arranged, and M and N are the integer greater than 1；
The LED light includes red LED, green LED, at least two LED in blue led；
The anode of the LED light of every row connects at one end in the matrix；
The cathode of the red LED of the LED light of each column connects at one end in the matrix；
The cathode of the green LED of the LED light of each column connects at one end in the matrix；
The cathode of the blue led of the LED light of each column connects at one end in the matrix；
Or
The cathode of the LED light of every row connects at one end in the matrix；
The anode of the red LED of the LED light of each column connects at one end in the matrix；
The anode of the green LED of the LED light of each column connects at one end in the matrix；
The anode of the blue led of the LED light of each column connects at one end in the matrix.
A kind of LED display system further includes that the first driving unit and/or second drive in addition to including above-mentioned LED display
Moving cell；
First driving unit includes the first power supply and the first driving circuit；
Second driving unit includes second source and the second driving circuit；
First power supply drives the red LED by the first driving circuit；
The second source drives the green LED and/or blue led by the second driving circuit；
First driving circuit is red LED driving circuit, and second driving circuit is green LED driving circuit
And/or blue led driving circuit.
Preferably, LED display system further includes first switch circuit and second switch circuit；
The first switch circuit is used to control the switch state of red LED；
The second switch circuit is used to control the switch state of green LED and/or blue led.
Preferably, first power supply is sequentially connected with red LED driving circuit, red LED, first switch circuit；Institute
State second source and green LED and/or blue led driving circuit, green LED and/or blue led, second switch circuit successively
Connection.
Preferably, the first switch circuit and second switch circuit include switch controller and switching transistor, institute
Switch state of the switch controller for control switch transistor is stated, to control the switch state of corresponding LED.
Preferably, the switching transistor is NMOS tube.
The beneficial effects of the utility model are: integrating in a manner of matrix by N*N LED light, reduce pin, increases
Big wiring space, shortens PCB and hands over the phase；And red LED, green LED and blue led is given to provide not respectively by two groups of power supplys
Same voltage overcomes red LED driving electricity existing in the prior art to reduce the voltage on red LED driving circuit
Road overtension, fever is serious, decaying faster the technical issues of, improve the stability of red LED, have it is good economical and
Social benefit.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
Fig. 1 is the routing model schematic diagram of LED display in the prior art；
Fig. 2 a and Fig. 2 b are a kind of circuit diagrams of a specific embodiment of LED display in the utility model；
Fig. 3 is a kind of circuit diagram of a specific embodiment of LED display system in the utility model.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
It as shown in Figure 2 a, is the circuit diagram of 3*3 matrix intergration model in the utility model, including 9 LED light, often
A LED light includes three LED in parallel of R, G, B (red, green, blue).The anode of 3 LED light of every a line is connected to one
End；The cathode of the red LED of 3 LED light of each column connects at one end, the cathode of the green LED of 3 LED light of each column
At one end, the cathode connection of the blue led of 3 LED light of each column is at one end for connection.Using such matrix integration mode, 9
A LED light only needs 12 Pin feet, so that it may be connected to driving IC.Compared with 36 Pin feet of the prior art, reduce 66.7%,
To increase wiring space, so that pcb board layer reduces or level number is reduced, PCB layout difficulty is reduced, cost is reduced, is shortened
The friendship phase.
In addition, as shown in Figure 2 b, the cathode of 3 LED light of every a line can also be connected at one end, 3 of each column
At one end, the anode connection of the green LED of 3 LED light of each column is at one end, each for the anode connection of the red LED of LED light
The anode connection of the blue led of 3 LED light of column is at one end.It also can achieve using such matrix integration mode and reduce Pin
Foot increases the purpose of wiring space.
As shown in figure 3, being a kind of circuit diagram of a specific embodiment of LED display system in the utility model.Its
In, give red LED, green LED and blue led to power respectively using two groups of different power supplys, including the first power supply VCC1, second
Power supply VCC2, red LED driving circuit, green LED and blue led driving circuit, red LED, green LED and blue led,
One switching circuit and second switch circuit.
Wherein, the first power supply VCC1 is sequentially connected with red LED driving circuit, red LED, first switch circuit, and first
Switching circuit includes 1 NMOS tube and 1 controller, and controller is used to control the on and off of NMOS tube, to control red
The on and off of color LED；Second source VCC2 and green LED and blue led driving circuit, green LED and blue led, second open
Powered-down road is sequentially connected, and second switch circuit includes 1 NMOS tube and 1 controller, and controller is used to control leading for NMOS tube
Logical and cut-off, to control the on and off of green LED and blue led.
Further, the cathode of the drain electrode of NMOS tube and red LED connects, and source electrode ground connection, grid is connect with controller.
NMOS is compared compared with PMOS, there is less spontaneous heating, so that more power shine for LED, therefore the present embodiment
Select NMOS tube as switching circuit.
Since the forward conduction voltage value of red LED is lower than the forward conduction voltage value of green LED and/or blue led, because
If this voltage wanted on two driving circuits is identical, the voltage value of the first power supply VCC1 should be less than the electricity of second source VCC2
Pressure value.In the present embodiment, the voltage value of setting power supply VCC1 is 4.3V, and the voltage value of power supply VCC2 is 5V, the forward direction of red LED
Conducting voltage is 1.8V, and the forward conduction voltage of green LED and blue led is 2.5V, and the fixed voltage of NMOS tube is 1V, then red
Voltage on color LED drive circuit is 4.3V-1.8V-1V=1.5V, and the voltage in green LED and blue led driving circuit is
5V-2.5V-1V=1.5V.Compared with prior art, the voltage on red LED driving circuit is reduced, so that red LED driving electricity
The voltage of road is consistent with the voltage in green LED and blue led driving circuit, reduces the fever of red LED.
It powers respectively to red LED, green LED, blue led in addition, three groups of power supplys can also be used in the utility model, wherein
It is lower than the supply voltage powered to green LED and blue led to the supply voltage that red LED is powered, gives green LED and blue
The supply voltage of LED power supply is equal.The voltage reduced on red LED driving circuit so also be can achieve to reduce fever
Purpose.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (6)
1. a kind of LED display characterized by comprising
M*N LED light, the M*N LED light are arranged with the matrix pattern that M row N is arranged, and M and N are the integer greater than 1；
The LED light includes red LED, green LED, at least two LED in blue led；
The anode of the LED light of every row connects at one end in the matrix；
The cathode of the red LED of the LED light of each column connects at one end in the matrix；
The cathode of the green LED of the LED light of each column connects at one end in the matrix；
The cathode of the blue led of the LED light of each column connects at one end in the matrix；
Or
The cathode of the LED light of every row connects at one end in the matrix；
The anode of the red LED of the LED light of each column connects at one end in the matrix；
The anode of the green LED of the LED light of each column connects at one end in the matrix；
The anode of the blue led of the LED light of each column connects at one end in the matrix.
2. a kind of LED display system, which is characterized in that further include first in addition to including LED display described in claim 1
Driving unit and/or the second driving unit；
First driving unit includes the first power supply and the first driving circuit；
Second driving unit includes second source and the second driving circuit；
First power supply drives the red LED by the first driving circuit；
The second source drives the green LED and/or blue led by the second driving circuit；
First driving circuit be red LED driving circuit, second driving circuit be green LED driving circuit and/or
Blue led driving circuit.
3. a kind of LED display system according to claim 2, which is characterized in that further include first switch circuit and second
Switching circuit；
The first switch circuit is used to control the switch state of red LED；
The second switch circuit is used to control the switch state of green LED and/or blue led.
4. a kind of LED display system according to claim 3, which is characterized in that first power supply and red LED drive
Circuit, red LED, first switch circuit are sequentially connected；The second source and green LED and/or blue led driving circuit,
Green LED and/or blue led, second switch circuit are sequentially connected.
5. a kind of LED display system according to claim 3 or 4, which is characterized in that the first switch circuit and second
Switching circuit includes switch controller and switching transistor, and the switch controller is used for the switch shape of control switch transistor
State, to control the switch state of corresponding LED.
6. a kind of LED display system according to claim 5, which is characterized in that the switching transistor is NMOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821091222.9U CN208477891U (en) | 2018-07-10 | 2018-07-10 | A kind of LED display and LED display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821091222.9U CN208477891U (en) | 2018-07-10 | 2018-07-10 | A kind of LED display and LED display system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208477891U true CN208477891U (en) | 2019-02-05 |
Family
ID=65210036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821091222.9U Active CN208477891U (en) | 2018-07-10 | 2018-07-10 | A kind of LED display and LED display system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208477891U (en) |
-
2018
- 2018-07-10 CN CN201821091222.9U patent/CN208477891U/en active Active
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