CN208014347U - A kind of scan drive circuit of LED display - Google Patents
A kind of scan drive circuit of LED display Download PDFInfo
- Publication number
- CN208014347U CN208014347U CN201820510485.2U CN201820510485U CN208014347U CN 208014347 U CN208014347 U CN 208014347U CN 201820510485 U CN201820510485 U CN 201820510485U CN 208014347 U CN208014347 U CN 208014347U
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- drive circuit
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- horizontal drive
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Abstract
The utility model discloses a kind of scan drive circuits of LED display, it includes negater circuit and horizontal drive circuit, five tunnels of scanning signal or six tunnel scanning signals are directly transferred to horizontal drive circuit, scanning signal all the way or the reverse signal that is obtained after negater circuit carries out reverse process of two-way scanning signal is transmitted to horizontal drive circuit.Negater circuit is simple in the utility model, and design cost is relatively low；Output signal is few after reversed, and circuit design is simple；Negater circuit is simple, and signal input and output delay is less, general several nanoseconds, coordinates closely between display data, is less prone to exception；Scanning signal is directly opposite, and is strobed into from the first via and is finally gated all the way there is no decoding circuit, returns again to the switching problem of the first via, and it is abnormal to greatly reduce display, and display system is facilitated to carry out various signal processings.
Description
Technical field
The utility model is related to LED to show actuation techniques field, especially a kind of scan drive circuit of LED display.
Background technology
In the prior art, as shown in Figure 1, LED display is when doing 16 and sweeping the above scanning, general three tunnels scanning signal A B
C directly controls horizontal drive circuit, and in addition two-way or three tunnel scanning signals are decoded by decoding circuit, the roads output 2-8 gating signal,
Control horizontal drive circuit is removed again, to realize that 17-64 is scanned.
The deficiency for prior art disadvantage/need to solve：
1, decoding circuit is complicated, and design cost is higher.
2, decoding output signal is more, and circuit design is complicated, and such as 32 sweep decoding 4 tunnel decoded signals of output, in addition three tunnels are swept
It retouches
Signal totally 7 signal wires, such as do 64 and sweep decoding 8 tunnel decoded signals of output, believe for totally 11 plus three tunnel scanning signals
Number line.
3, decoding circuit is complicated, and signal input and output delay is more, generally at least tens nanoseconds, causes display abnormal.
4, decoding circuit does scanning strobe signal and exports in order, is strobed into from the first via and finally gates all the way, returns again to
The first via, the time cycle is longer, and when finally scanning signal returns to first via gating signal all the way, causes to show
It is abnormal.
Utility model content
In view of the above-mentioned deficiencies of the prior art, technical problem to be solved by the utility model is to provide a kind of LED displays
Scan drive circuit.
In order to solve the above technical problems, technical solution adopted in the utility model is：A kind of scanning drive of LED display
Dynamic circuit comprising negater circuit and horizontal drive circuit, five tunnels of scanning signal or six tunnel scanning signals are directly transferred to capable drive
Dynamic circuit, scanning signal all the way or the reverse signal transmission that is obtained after negater circuit carries out reverse process of two-way scanning signal
To horizontal drive circuit.
In above-mentioned technical proposal, the negater circuit is phase inverter.
In above-mentioned technical proposal, the scanning signal is exported from LED display drive chip, and after signal buffer circuit
It is transmitted to the negater circuit and horizontal drive circuit.
The utility model has the beneficial effects that：
1, negater circuit is simple, and design cost is relatively low.
2, reversed rear output signal is few, and circuit designs simply, and such as 32 sweep 1 road signal of reversed rear output, in addition letter is scanned on 5 roads
Number totally 6 signal wires, such as do 64 sweep it is reversed after export 2 road signals, in addition 6 tunnel scanning signals totally 8 signal wires.
3, negater circuit is simple, and signal input and output delay is less, general several nanoseconds, coordinates closely between display data,
It is less prone to exception.
4, scanning signal is directly opposite, and is strobed into from the first via and is finally gated all the way there is no decoding circuit, returns again to
Switching problem all the way greatly reduces display exception, display system is facilitated to carry out various signal processings.
Description of the drawings
Fig. 1 is the principle schematic of the prior art；
Fig. 2 is the principles of the present invention schematic diagram；
Fig. 3 is the circuit theory schematic diagram of Fig. 2.
In figure, 1, signal buffer circuit；2, negater circuit；3, horizontal drive circuit.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings.
As Figure 2-3, a kind of scan drive circuit of LED display comprising negater circuit 2 and horizontal drive circuit 3,
Five tunnels of scanning signal or six tunnel scanning signals are directly transferred to horizontal drive circuit, scanning signal all the way or two-way scanning signal
The reverse signal obtained after negater circuit carries out reverse process is transmitted to horizontal drive circuit.The negater circuit is phase inverter.
The scanning signal is exported from LED display drive chip, and be transmitted to after signal buffer circuit 1 negater circuit and
Horizontal drive circuit.Horizontal drive circuit is made of several chips.
The operation principle of the utility model：
LED display when doing 16 and sweeping the above scanning, scanning signal A B C D E F directly control horizontal drive circuit, separately
Arbitrary in outer selection D E F scanning signals carries out reverse process all the way or two-way, it is reversed after all the way or two-way is reversed
Signal directly controls horizontal drive circuit, to realize that 17-64 is swept.
Wherein, realize 17-32 sweep only need scanning signal A B C D E directly control horizontal drive circuit, in addition select D E
Arbitrary in scanning signal carry out all the way it is reversed, it is reversed after signal all the way directly drive line control circuit；Realize that 33-64 is swept only
Need scanning signal A B C D E F directly control horizontal drive circuit, in addition select D E arbitrary two-way in F scanning signals into
Row is reversed, it is reversed after two paths of signals directly drive line control circuit.
Above embodiment only indicates that rather than limits the utility model, therefore all according to the utility model patent application
The equivalent change or modification that method described in range is done, is included in the scope of the utility model patent application.
Claims (3)
1. a kind of scan drive circuit of LED display, it is characterised in that：Including negater circuit and horizontal drive circuit, scanning letter
Number five tunnels or six tunnel scanning signals be directly transferred to horizontal drive circuit, scanning signal all the way or two-way scanning signal is through reversed
The reverse signal that circuit obtained after reverse process is transmitted to horizontal drive circuit.
2. a kind of scan drive circuit of LED display according to claim 1, it is characterised in that：The negater circuit
For phase inverter.
3. a kind of scan drive circuit of LED display according to claim 1, it is characterised in that：The scanning signal
It is exported from LED display drive chip, and is transmitted to the negater circuit and horizontal drive circuit after signal buffer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820510485.2U CN208014347U (en) | 2018-04-11 | 2018-04-11 | A kind of scan drive circuit of LED display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820510485.2U CN208014347U (en) | 2018-04-11 | 2018-04-11 | A kind of scan drive circuit of LED display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208014347U true CN208014347U (en) | 2018-10-26 |
Family
ID=63892360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820510485.2U Active CN208014347U (en) | 2018-04-11 | 2018-04-11 | A kind of scan drive circuit of LED display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208014347U (en) |
-
2018
- 2018-04-11 CN CN201820510485.2U patent/CN208014347U/en active Active
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