CN215988072U

CN215988072U - Drive circuit of full-color LED display module

Info

Publication number: CN215988072U
Application number: CN202122031120.6U
Authority: CN
Inventors: 张婷; 张昌望; 乔贝; 李少辉; 南普
Original assignee: Shanxi Gaoke Huachen Electronic Material Co ltd
Current assignee: Shanxi Gaoke Huachen Electronic Material Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-03-08
Anticipated expiration: 2031-08-26

Abstract

The utility model discloses a drive circuit of a full-color LED display module, belonging to the technical field of LED drive circuits; the technical problem to be solved is as follows: the improvement of the hardware structure of the drive circuit of the full-color LED display module is provided; the technical scheme for solving the technical problems is as follows: the LED display screen comprises a control card, an LED screen interface, a line driving chip, an amplifying circuit, a row driving chip, a triode and a plurality of lamp beads, wherein each line and each row of driving signals output by the control card are input into an input terminal of the LED screen interface through a bus; the utility model is applied to the LED module.

Description

Drive circuit of full-color LED display module

Technical Field

The utility model discloses a drive circuit of a full-color LED display module, and belongs to the technical field of drive circuits of full-color LED display modules.

Background

The LED display screen is unique in the public multimedia display field due to high brightness, clear pictures and bright colors, the LED display screen is continuously developed along with the technology, a full-color RGB LED module is widely applied in a large range, the existing 16-scan LED module can only realize 16-scan without using a phase inverter, when the 17-32-scan LED module needs to be realized, 74HC04 output reverse enabling signals need to be used for realizing, but only two pins of enabling signals need to be connected when the phase inverter is used, the number of idle pins is large, the circuit layout on the driving control board is complex due to the fact that the phase inverter is connected, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to solve the technical problems that: the improvement of the hardware structure of the drive circuit of the full-color LED display module is provided.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a full-color LED display module's drive circuit, includes control card, LED screen interface, line driver chip, amplifier circuit, row driver chip, triode, many lamp pearls, each line of control card output, each row of drive signal pass through the input terminal of bus input LED screen interface, the output terminal of LED screen interface will be through the RGB input terminal of each row of drive signal input row driver chip that will amplify behind amplifier circuit, the RGB output terminal of row driver chip with on RGB drive signal input LED display screen on every lamp pearl, the output terminal of LED screen interface will be through each row of drive signal of amplifying input terminal and the triode of each row of driver chip respectively, through the triode with the messenger's pin of each row of drive chip of line drive signal phase reversal back input.

The control card specifically adopts a singlechip.

The amplifying circuit specifically adopts 245 series amplifying chips, including 74HC245 and 74LS 245.

The row driving chip is specifically of an ICN2012 type, and the column driving chip is specifically of a 16-channel double-buffer constant-current output LED driving chip with a low breakover voltage and open-circuit detection of an ICN2027 or ICND2046 type.

The LED screen interface specifically adopts the model to be HUB 75.

The plurality of lamp beads are distributed in a 64 x 64 matrix form.

Compared with the prior art, the utility model has the beneficial effects that: the drive circuit of the full-color LED display module provided by the utility model adopts a triode to replace a 74HC04 inverter, so that 17-32 scanning is realized, the circuit is simplified to a greater extent, and the cost is saved; and the triode has smaller volume than 74HC04, so that the LED circuit layout space can be effectively saved.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a driving circuit of the present invention;

FIGS. 3 and 4 are schematic diagrams of row driving circuits according to the present invention;

FIG. 5 is a schematic diagram of a column driver circuit of the present invention;

FIG. 6 is a schematic diagram of an amplifying circuit of the present invention;

fig. 7 is a schematic diagram of an LED screen interface circuit of the present invention.

Detailed Description

As shown in fig. 1 to 7, the driving circuit of a full-color LED display module according to the present invention includes a control card, an LED screen interface, a row driving chip, an amplifying circuit, a column driving chip, a triode, and a plurality of beads, wherein each row and each column driving signal output by the control card is input to an input terminal of the LED screen interface through a bus, an output terminal of the LED screen interface inputs each amplified row driving signal to an RGB input terminal of the column driving chip after passing through the amplifying circuit, an RGB output terminal of the column driving chip inputs the RGB driving signal to each bead on the LED display screen, an output terminal of the LED screen interface inputs each amplified row driving signal to an input terminal of each row driving chip and the triode, and the row driving signal is inverted through the triode and then input to an enable pin of each row driving chip.

The control card specifically adopts a singlechip.

The LED screen interface specifically adopts the model to be HUB 75.

The plurality of lamp beads are distributed in a 64 x 64 matrix form.

The drive circuit of the full-color LED display module mainly comprises a control card, a row drive chip, a column drive chip, an amplifying circuit, a CLK, LAT and OE signals, wherein the CLK, LAT and OE signals output by the control card are connected with each column drive IC in a bus mode; with the LED screen interface of HUB75 having 2R/G/B data input pins, 5 address pins and 3 control pins clock, latch and enable, still 32 sweeps, 64 rows of control are achieved by controlling two rows simultaneously.

The working principle of the utility model is as follows: and data are sent in series, n column drivers require data with the number of n × 16 bits, and after the first column driver fills the register, each column driver is sequentially shifted and filled in series until the register of the last column driver is filled. And then latch and output the current.

It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules adopted in the present invention is determined and can be realized, except for the specific description in the embodiment, the specific connection relationship can bring the corresponding technical effect, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of the corresponding software program.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a full-color LED display module assembly's drive circuit which characterized in that: the LED display screen comprises a control card, an LED screen interface, a line driving chip, an amplifying circuit, a row driving chip, a triode and a plurality of lamp beads, wherein each line and each row of driving signals output by the control card are input into an input terminal of the LED screen interface through a bus, an output terminal of the LED screen interface inputs each amplified row of driving signals into an RGB input terminal of the row driving chip after passing through the amplifying circuit, an RGB output terminal of the row driving chip inputs the RGB driving signals onto each lamp bead on the LED display screen, an output terminal of the LED screen interface respectively inputs each amplified row of driving signals into an input terminal of each row of driving chip and the triode, and the line driving signals are inverted through the triode and then input into enabling pins of each row of driving chips.

2. The driving circuit of a full-color LED display module according to claim 1, wherein: the control card specifically adopts a singlechip.

3. The driving circuit of a full-color LED display module according to claim 1, wherein: the amplifying circuit specifically adopts 245 series amplifying chips, including 74HC245 and 74LS 245.

4. The driving circuit of a full-color LED display module according to claim 1, wherein: the row driving chip is specifically of an ICN2012 type, and the column driving chip is specifically of a 16-channel double-buffer constant-current output LED driving chip with a low breakover voltage and open-circuit detection of an ICN2027 or ICND2046 type.

5. The driving circuit of a full-color LED display module according to claim 1, wherein: the LED screen interface specifically adopts the model to be HUB 75.

6. The driving circuit of a full-color LED display module according to claim 1, wherein: the plurality of lamp beads are distributed in a 64 x 64 matrix form.