CN105469739A - Cascaded LED smart glass drive system - Google Patents

Abstract

The invention provides a cascade LED intelligent glass driving system, which comprises: the LED intelligent glass display screen comprises a driving module, a power supply module, an MCU control module and an LED intelligent glass display screen; the driving module includes: the driver comprises N input ports and N output ports, wherein the N input ports of the first driver are connected with the MCU control module, the N output ports are connected with the N input ports of the second driver, the first driver selects the first input port of the N output ports to receive a video signal sent by the MCU control module, the second output port forwards the video signal to the second driver, and so on, the N-1 driver receives the video signal forwarded by the N-2 driver through the N-2 output ports through the N-1 input port and forwards the video signal to the N driver through the N-1 output port. The invention simplifies the system of the large-area LED intelligent glass display screen and improves the working efficiency of the system.

Description

Cascaded LED smart glass drive system

technical field

The embodiment of the present invention relates to the technical field of LED smart glass, in particular to a cascaded LED smart glass drive system.

Background technique

At present, LED display technology has matured day by day and is used in various fields of social life. At the same time, outdoor large-scale LED displays are also widely used in large shopping malls and building exterior walls. LED displays are mainly used to display videos, graphics, notifications, etc. in real time. Large LED smart glass display system is a kind of large LED display. In the application of smart glass display system, first the MCU control subsystem converts video, graphics, notifications, etc. Realize grayscale control, and output RGB component information to the LED smart glass display through the data interface, so as to realize the video source display in the host computer.

The LED smart glass display is inlaid with a large number of LED dot matrixes distributed according to certain rules. Each dot matrix represents a pixel point. The display system displays the video source signal of the host computer by controlling the LED dot matrix.

In the process of signal transmission, the working efficiency of the LED intelligent driving system in the prior art is low.

Contents of the invention

An embodiment of the present invention provides a cascaded LED smart glass drive system to overcome the above technical problems.

The cascaded LED intelligent glass driving system of the present invention includes:

Driver module, power module, MCU control module and LED smart glass display;

One end of the MCU control module is connected to the host computer through a DVI line, the other end is connected to the drive module, and the power supply module is connected to the drive module;

The drive module includes: a plurality of cascaded drivers, the drivers include N input ports and N output ports, wherein the N input ports of the first driver are connected to the MCU control module, and the N The output ports are connected to the N input ports of the second driver, the first driver selects the first input port in the N output ports to receive the video signal sent by the MCU control module, and the second output port sends the video signal to the described MCU control module. The second driver forwards the video signal, and so on, the N-1th driver receives the N-2 driver through the N-2th output port through the N-1th input port. The N-1 output ports forward the video signal to the Nth driver.

Further, it also includes:

One end of the transmission sub-module is connected to the MCU control module, and the other end is connected to the drive module, and is used to transmit the video signal output by the MCU to the drive module in a differential serial manner.

Further, the driver also includes:

FPC connector, used to connect the LED smart glass display.

Further, the MCU control module includes:

DVI input unit, DVI decoding unit, DVI encoding unit, DVI output unit, video processing unit, data storage unit, control unit, signal transmission unit;

The DVI input unit receives the video signal sent by the host computer;

The DVI decoding unit decodes the video signal into R, G, and B component signals;

The DVI encoding unit converts the component signal into a video source signal;

The DVI output unit outputs the video source signal to the next-level MCU control module;

a video processing unit processes the component signals;

a data storage unit stores the component signals;

The control unit sends a control instruction to the video processing unit;

The signal transmission unit sends video signals to the driving module.

The invention realizes large-scale cascading of LED drivers in a single branch in the drive system of the LED smart glass display, thereby increasing the area of the driven LED smart glass display. It simplifies the system of large-area LED smart glass display and improves the working efficiency of the system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural schematic diagram of cascaded LED intelligent glass drive system of the present invention;

Fig. 2 is a structural schematic diagram of the MCU control module of the cascaded LED smart glass driving system of the present invention;

Fig. 3 is another structural schematic diagram of the cascaded LED smart glass driving system of the present invention;

Fig. 4 is a schematic diagram of LED dot matrix distribution in the LED smart glass display area of the cascaded LED smart glass driving system of the present invention;

Fig. 5 is a schematic structural diagram of the cascaded LED smart glass drive module of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of the cascaded LED smart glass drive system of the present invention, as shown in Fig. 1, the system of this embodiment may include:

Drive module 101, power supply module 102, MCU control module 103 and LED smart glass display 104;

The drive module 101 includes: a plurality of cascaded drivers, the drivers include N input ports and N output ports, wherein the N input ports of the first driver are connected to the MCU control module, the N output ports are connected to N input ports of the second driver, the first driver selects the first input port in the N output ports to receive the video signal sent by the MCU control module, and the second output port sends to all The second driver forwards the video signal, and so on, the N-1 driver receives the video signal forwarded by the N-2 driver through the N-2 output port through the N-1 input port, and passes The N-1th output port forwards the video signal to the Nth driver.

Further, the driver also includes:

FPC connector, used to connect the LED smart glass display.

Specifically, the host computer transmits the video source signal to be displayed to the MCU control subsystem through the DVI cable.

The power supply box provides working power for the driving display subsystem and the MCU control subsystem, and at the same time outputs current to the LED smart glass display through the driving subsystem circuit for driving the LED dot matrix. The power supply box provides power for the entire LED smart glass display system.

Further, as shown in Figure 2, the MCU control module includes:

DVI input unit 201, DVI decoding unit 202, DVI encoding unit 203, DVI output unit 204, video processing unit 205, data storage unit 206, signal transmission unit 207 and control unit 208;

The DVI input unit receives the video signal sent by the host computer;

The DVI decoding unit is used to decode the video signal into RGB data and serial clock;

The output unit is used to send the RGB data and serial clock to the driving unit.

Specifically, FIG. 2 is a structural schematic diagram of the MCU control subsystem. As shown in FIG. 2, the structure includes a DVI input unit 201, a DVI encoding unit 203, a DVI decoding unit 202, a DVI output unit 204, a video processing unit 205, Data storage unit 206, control unit 208, signal transmission unit 207;

The functions of each unit of the MCU control subsystem include that the DVI decoding unit 202 converts the video source signal into R, G, and B component signals, the DVI input unit 201 receives the video source signal sent by the host computer, and the DVI encoding unit 203 converts the R , G, B component signals are converted into video source signals, DVI output unit 204 outputs video source signals to the next-level controller, video processing unit 205 processes the R, G, B component signals generated by the DVI decoding unit, and data storage unit 206 stores the R, G, and B component signals, the control unit 208 sends control instructions to the processing unit, and the signal transmission module 207 is an RS422 sending circuit module, which converts the R, G, and B component signals and the serial clock into a differential signal and clock.

Further, as shown in Figure 3, it also includes:

One end of the transmission sub-module is connected to the MCU control module, and the other end is connected to the drive module, and is used to transmit the video signal output by the MCU to the drive module in a differential serial manner.

Specifically, the transmission subsystem adopts the RS422 serial data interface standard, and uses the signal differential serial transmission method to transmit the RGB data of the RS422 transmitter to the RS422 receiver via the network cable carrier, so as to ensure the reliability and stability of long-distance transmission data sex. Realize the lossless transmission function between the MCU control subsystem and the drive subsystem.

Fig. 4 is a schematic diagram of LED dot matrix distribution in the display area of the smart glass. The smart glass display screen is inlaid with a large number of LED lattices distributed according to a certain law inside the smart glass. As shown in Figure 4, it is the LED dot matrix distribution law in the smart glass display. Each LED point represents a pixel point. Each LED point is controlled by a dedicated driver chip, thereby controlling the change of each pixel point and realizing the host computer video. The source information is displayed. The LED smart glass display screen is specially made glass, which is essentially a super-large LED display screen, and is a flat display screen composed of dot matrix modules or pixel units composed of light-emitting diodes. The smart glass display screen is connected to the driving subsystem through the FPC connector, and the driving subsystem realizes the image source information display by controlling the LED dot matrix embedded in the glass.

FIG. 5 is a schematic structural diagram of the LED driving module of the present invention. As shown in FIG. 5 , the driving module in this embodiment realizes the function of driving and displaying. Its input terminal is the RGB format data transmitted by the transmission subsystem and the current transmitted by the power box. The dedicated LED driver chip in the drive subsystem realizes grayscale control of the image, and outputs the RGB component information to the LED smart glass display in parallel. On, to realize the information display in the upper computer. Each group of LED driving modules includes 4 LED drivers, namely Driver-A, Driver-B, Driver-C, and Driver-D. The four LED drivers are identical in appearance design, and are distinguished by color in engineering applications. It includes: a power supply module 401, a drive circuit module 402, an FPC connector 403, four input ports 404, and four output ports 405, and the ports can be ten-pin interfaces of model 5X2. The four LED drivers have 4 input interfaces at the input end, which are INT1, INT2, INT3, and INT4; they also have 4 transmission interfaces at the output end, which are OUT1, OUT2, OUT3, and OUT4. The four input ports input the same data information and current at the same time, and the four output ports output the data information and current to the next-level LED driver.

The difference in the design of each LED driver in a group lies in the connection design of the driving circuit module. In the circuit design of the LED driver-A, the power supply module and the driving circuit module are connected to the input interface INT1. The data signal and current input by the transmission interface INT1 are processed by the power module and the drive circuit module, and then output to the LED smart glass display for display through the FPC connector. At the same time, the signal and current are transmitted to the next-level LED driver through the output interface OUT1. The other 3 transmission interfaces directly transmit the signal and current to the next-level LED driver. In the circuit design of the driver-B, the input interface INT2 is selected at the input end, and the output interface OUT2 is selected at the output end; in the circuit design of the driver-C, the input interface INT3 is selected at the input end, and the output interface OUT3 is selected at the output end ; In the circuit design of the driver-D, the input interface INT4 is selected at the input end, and the output interface OUT4 is selected at the output end. Each group of four different LED drivers selects the signals and currents of four different transmission interfaces for processing, while the signals and currents of the other three interfaces are directly transmitted to the next-level driver. This design method is equivalent to changing a single transmission branch into four transmission branches, which can increase the number of single-channel cascaded LED drivers to four times. At the same time, the display of the LED smart glass display connected to the single-channel driver The area size is increased to 4 times. The display area with the same area can reduce the number of connecting branches of the LED driver, thereby simplifying the circuit and optimizing the project.

The work of the LED driver in this embodiment is mainly divided into the following steps: 1. The host computer transmits the video source signal to the MCU control subsystem through the DVI line, and 2. The MCU control subsystem converts the video source signal into RGB through the DVI decoding unit. Data and serial clock are transmitted to the first group of LED drivers through the transmission subsystem. 3. The dedicated driver chip on the LED driver converts the serial RGB data and clock into multiple channels of parallel data. The PWM grayscale modulation function integrated in the chip modulates the 12bit grayscale data of each output channel, and then transmits it to the smart phone through the FPC connector. LED dot matrix inlaid inside the glass display. At the same time, the input serial data and clock are serially output under the action of the shift register, and are used as the input source of the next group of driving circuit boards.

In the application field of large-scale LED smart glass, according to the problems raised above, the present invention provides a large-scale cascadable driver circuit board design. The LED driver adopts a multi-layer circuit board design with multiple transmission interfaces, and multiple transmission interfaces are designed at the input and output ends of the LED driver. When the whole system is working, the data signal is transmitted by multiple transmission interfaces of cascaded drivers. Since the data signals transmitted by each interface are exactly the same, the dedicated driver chip on the LED driver only needs to select the data signal input by one of the transmission interfaces for processing. The PWM grayscale modulation function integrated in the chip modulates the grayscale data of each output channel, and then transmits it to the LED dot matrix embedded in the LED smart glass via the FPC connector for display. The data signals transmitted by other transmission interfaces are output to the next-level LED driver, which is equivalent to changing a single transmission branch into multiple transmission branches. Through the circuit board design of the LED driver, large-scale cascading of the LED driver can be realized in a single branch, thereby increasing the area of the driven LED smart glass display.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (4)

1. A cascaded LED smart glass drive system, characterized in that it comprises: Driver module, power module, MCU control module and LED smart glass display; One end of the MCU control module is connected to the host computer through a DVI line, the other end is connected to the drive module, and the power supply module is connected to the drive module; The drive module includes: a plurality of cascaded drivers, the drivers include N input ports and N output ports, wherein the N input ports of the first driver are connected to the MCU control module, and the N The output ports are connected to the N input ports of the second driver, the first driver selects the first input port in the N output ports to receive the video signal sent by the MCU control module, and the second output port sends the video signal to the described MCU control module. The second driver forwards the video signal, and so on, the N-1th driver receives the N-2 driver through the N-2th output port through the N-1th input port. The N-1 output ports forward the video signal to the Nth driver. 2. The system according to claim 1, further comprising: One end of the transmission sub-module is connected to the MCU control module, and the other end is connected to the drive module, and is used to transmit the video signal output by the MCU to the drive module in a differential serial manner. 3. The system according to claim 1 or 2, wherein the driver further comprises: FPC connector, used to connect the LED smart glass display. 4. The system according to claim 1, wherein the MCU control module comprises: DVI input unit, DVI decoding unit, DVI encoding unit, DVI output unit, video processing unit, data storage unit, control unit, signal transmission unit; The DVI input unit receives the video signal sent by the host computer; The DVI decoding unit decodes the video signal into R, G, and B component signals; The DVI encoding unit converts the component signal into a video source signal; The DVI output unit outputs the video source signal to the next-level MCU control module; a video processing unit processes the component signals; a data storage unit stores the component signals; The control unit sends a control instruction to the video processing unit; The signal transmission unit sends video signals to the driving module.