CN110933332B - Display control system - Google Patents
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- CN110933332B CN110933332B CN201911147844.8A CN201911147844A CN110933332B CN 110933332 B CN110933332 B CN 110933332B CN 201911147844 A CN201911147844 A CN 201911147844A CN 110933332 B CN110933332 B CN 110933332B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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Abstract
The present invention relates to a display control system, comprising: the display device consists of an LED lamp strip and comprises a first display module and a second display module; a server for storing source display data; the video processing device comprises a first video processor and a second video processor, and is used for receiving source display data and performing data conversion, data storage and data distribution, wherein the first video processor is used for storing display data corresponding to a first display module, and the second video processor is used for storing display data corresponding to a second display module; and the multi-component control device receives the display data processed by the video processing device and controls the LED lamp strips correspondingly connected to display the display data. The display control system adopts the two video processors to distribute the display data, and controls the display device with two million pixel points together, so that the requirement on the video processors can be reduced, and the problem that the conventional outdoor display system cannot drive the display device with the two million pixel points is solved under the condition of adopting the original video processors.
Description
Technical Field
The invention relates to the field of display control, in particular to a display control system.
Background
With the development of technology, the Display specifications of LCD (Liquid Crystal Display) Display devices are gradually increasing. Conventional outdoor display devices usually include one million pixels, so that a conventional display control system can be used to drive one million pixels of display devices. With the improvement of display specifications, display resolution is also higher and higher, and because the popularization of display devices with two million pixels and even higher resolution is insufficient, the conventional display control system is required to be improved to satisfy the display of screens with high resolution.
Disclosure of Invention
Therefore, it is necessary to provide a display control system for solving the problem that the conventional display control system cannot control the display device with two million pixels.
A display control system, comprising:
the display device comprises a first display module and a second display module, wherein the first display module and the second display module respectively comprise the LED lamp belts which are arranged in an array and have the same number;
a server for storing source display data;
the video processing device comprises a first video processor and a second video processor, wherein the first video processor and the second video processor are connected with the server through a video distributor and are used for receiving the source display data and performing data conversion, data storage and data distribution, the first video processor is used for storing the display data corresponding to the first display module, and the second video processor is used for storing the display data corresponding to the second display module;
and the multi-component control device receives the display data processed by the video processing device and controls the correspondingly connected LED lamp strip to display. In one embodiment, the first video processor includes a first interface board and a first core board, the first interface board is connected to the first core board, the first interface board is configured to perform data conversion, and the first core board is configured to receive and store converted video data;
the second video processor comprises a second interface board and a second core board, the second interface board is connected with the second core board, the second interface board is used for data conversion, and the second core board is used for receiving and storing converted video data;
the first interface board is detachably connected with the first core board, and the second interface board is detachably connected with the second core board.
In one embodiment, the first interface board includes a first decoding module, a first network port and a second network port, the first core board includes a first processing module, a first storage module, a second storage module, a first gigabit network card and a second gigabit network card, the first decoding module is configured to receive source display data and decode the source display data to obtain processed display data, the first processing module receives the processed display data and controls the first storage module and the second storage module to perform ping-pong storage, and the first processing module reads the display data in the first storage module and the second storage module and sends the display data to the first network port and the second network port through the first gigabit network card and the second gigabit network card;
the second interface board comprises a second decoding module, a third network port and a fourth network port, the second core board comprises a second processing module, a third storage module, a fourth storage module, a third gigabit network card and a fourth gigabit network card, the second decoding module is used for receiving the source display data and decoding the source display data to obtain processed display data, the second processing module receives the processed display data and controls the third storage module and the fourth storage module to perform ping-pong storage, and meanwhile, the second processing module reads the display data in the third processing module and the fourth processing module and sends the display data to the third network port and the fourth network port through the third gigabit network card and the fourth gigabit network card.
In one embodiment, the first network port, the second network port, the third network port and the fourth network port are correspondingly connected with a group of branch control devices;
each group divide the accuse device all includes cascaded branch controller, divide the controller to include input net gape and output net gape, divide the output net gape of controller to be used for connecting the input net gape that the controller was divided to the next stage, wherein every group divide the input net gape of the branch controller of accuse device tip to be used for corresponding the connection first net gape, the second net gape third net gape with the fourth net gape.
In one embodiment, each of the sub-controllers includes N ports, and each of the ports is used for connecting a column of the LED strips.
In one embodiment, the first video processor and the second video processor are further configured to pack the display data into a plurality of data packets, each of the data packets includes display data corresponding to M rows and N columns of pixel points, where M is an integer greater than or equal to 1.
In one embodiment, the first port, the second port, the third port, and the fourth port transmit the data packet to the sub-controllers connected correspondingly.
In one embodiment, the slave controller includes a slave control interface board and a slave control core board, the input network port, the output network port and the N ports are disposed on the slave control interface board, and the slave control interface board is connected to the slave control core board, and is configured to receive the data packet and transmit the data packet to the slave control core board;
the sub-control core board comprises a sub-control processing module, a sub-control storage module and a sub-control gigabit network card, wherein the sub-control processing module controls the sub-control storage to store the received data packet, and reads display data corresponding to the LED lamp strip connected with the current sub-controller from the sub-control storage to control the LED lamp strip to display;
the sub-control processing module also sends the data packet to the sub-control gigabit network card, and the sub-control gigabit network card sends the received data packet to a next sub-controller through the output network port;
the sub-control interface board is detachably connected with the sub-control core board.
In one embodiment, the video processing device further comprises a switch, which is arranged between the video processing device and the sub-controller; and/or
The switch is arranged between two adjacent cascaded branch controllers.
In one embodiment, the display control system further includes a fiber optic transmitter and a fiber optic receiver, which are disposed between the video processing device and the switch, the fiber optic transmitter is connected to the video processing device, the fiber optic receiver is connected to the switch, and the video processing device and the switch perform data transmission through the fiber optic transmitter and the fiber optic receiver.
In the display control system, the video processing device comprises the first video processor and the second video processor, the two video processors are adopted to distribute display data and jointly control the display device with two million pixel points, the requirement on the video processors can be reduced, and the problem that the conventional outdoor display system cannot drive the display device with the two million pixel points is solved under the condition of adopting the original video processors.
Drawings
FIG. 1 is a block diagram of a display control system according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a display device module division according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a display control system module according to yet another embodiment of the present application;
fig. 4 is a schematic diagram of a display device according to another embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, an embodiment of the present application provides a display control system, which includes a server 100, a video processing apparatus 200, a multi-component control apparatus 300, and a display apparatus 400.
The display device 400 may be an LCD display screen, and is mainly used for outdoor display, for example, an LCD display screen installed on a building surface. The LCD display screen is formed by arranging a plurality of LED (Light Emitting Diode) lamp strips in an array, each LED lamp strip is formed by connecting a plurality of LED lamp points in series, and each lamp point forms a pixel point in the LCD display screen. The display apparatus 400 may be divided into two left and right first display modules 410 and 420. The first display module 410 and the second display module 420 have the same size, that is, the first display module 410 and the second display module 420 include the same number of LED strips therein. Specifically, the display device in this embodiment is a 1920 × 1080 resolution display, which includes about two million pixels, and the first display module 410 and the second display module 420 respectively include one million pixels.
The server 100 is used to store source display data. The source display data is display data before being processed. The video processing apparatus 200 is connected to the server 100, and is configured to receive and process source display data. In this embodiment, the video processing apparatus 200 includes a first video processor 210 and a second video processor 220. The first video processor 210 and the second video processor 220 are connected to the server 100 through the video distributor 110, and are configured to receive the source display data sent by the server 100 and perform data conversion, data storage and data distribution. The first video processor 210 is configured to process and store display data corresponding to the first display module 410, and the second processor 220 is configured to process and store display data corresponding to the second display module 420.
The sub-control device 300 is connected to the video processing device 200 and is used for controlling the display of the LED strip. In this embodiment, the sub-controllers 300 are provided in multiple groups, and each sub-controller 300 is formed by cascading multiple sub-controllers. The sub-control device 300 receives the display data processed by the video processing device 200, and then controls the LED strips correspondingly connected to the sub-control device to display the display data.
Because the video processor in the common outdoor display control system can only drive one million pixel points, the traditional display control system can not drive the display device with two million pixel points along with the improvement of the specification of the display panel. Therefore, in the display control system provided in this embodiment, the video processing device 200 includes the first video processor 210 and the second video processor 220, and the two video processors are used to distribute the display data to jointly control a display device with two million pixels, so that the requirement on the video processors can be reduced, and the problem that the conventional outdoor display system cannot drive the display device with two million pixels can be solved under the condition of using the original video processor.
In one embodiment, the first video processor 210 includes a first interface board and a first core board. The first interface board is used for receiving source display data, performing data conversion and then sending the source display data to the first core board, and the first core board stores the converted display data. The second video processor 220 includes a second interface board and a second core board. The second interface board is used for receiving the source display data, converting the source display data into data and sending the data to the second core board, and the second core board stores the converted display data. In this embodiment, the first interface board is detachably connected to the first core board, and the second interface board is detachably connected to the second core board. The connection mode of the first interface board and the first core board is the same as the connection mode of the second interface board and the second core board, and this embodiment takes the connection mode of the first interface board and the first core board as an example for description, the first core board may include a plurality of rows of pins, where the pins may be male pins or female pins, and the first interface board has pins corresponding to the pins on the first core board for plugging the first core board. When the core board is used, the first core board can be plugged on the first interface board, and the first core board and the first interface board perform data transmission through the pin header.
Further, the first interface board includes a first decoding module, a first network port and a second network port. The first decoding module is configured to receive source display data corresponding to the first display module and decode the source display data to obtain processed display data, where in this embodiment, the decoded display data includes a synchronous clock signal, a data valid signal, a line synchronization signal, a field synchronization signal, and a pixel data signal. The first decoding module sends the processed display data to the first core board. The first core board comprises a first processing module, a first storage module, a second storage module, a first gigabit network card and a second gigabit network card. The first processing module is used for receiving the processed display data and controlling the first storage module and the second storage module to store the display data, wherein the storage mode is ping-pong storage, that is, the first processing module reads data from one storage module when controlling the other storage module to write data in. In this embodiment, the first storage module and the second storage module may be both SDRAM (synchronous dynamic random-access memory). In the case of storing, the display data of 4 pixels may be stored as a unit. And the first processing module transmits the read display data to the first kilomega network card and the second kilomega network card. The first kilomega network card and the second kilomega network card transmit the display data to the first network port and the second network port respectively so as to send the display data to the sub-controllers which are correspondingly connected through the first network port and the second network port.
The second interface board comprises a second decoding module, a third network port and a fourth network port. The second decoding module is used for receiving the source display data corresponding to the second display module and decoding the source display data to obtain decoded display data. Similarly, the decoded display data includes a synchronization clock signal, a data valid signal, a line synchronization signal, a field synchronization signal, and a pixel data signal. And the second decoding module sends the processed display data to a second core board. The second core board comprises a second processing module, a third storage module, a fourth storage module, a third gigabit network card and a fourth gigabit network card. The second processing module is used for receiving the processed display data and controlling the third storage module and the fourth storage module to store the display data, wherein the storage mode is ping-pong storage. In this embodiment, the third storage module and the fourth storage module may also be both SDRAMs. In the storage, similarly, the display data of 4 pixels is stored as a unit. And the second processing module transmits the read display data to the third kilomega network card and the fourth kilomega network card. And the third kilomega network card and the fourth kilomega network card respectively transmit the processed display data to the sub-controllers which are correspondingly connected through the third network port and the fourth network port.
In this embodiment, the resolution of the control system is 1920 × 1080, and the control system is standard-equipped with a GTX1050 graphics card. In this embodiment, the video refresh rate is 60Hz and 24 bits per pixel, and the total transmission speed of the network card is 1920 × 1080 × 60 × 24 ═ 2985984000bit/s, that is, about 2.98 Gbit/s. Furthermore, the first video processor 210 and the second video processor 220 share 1.49Gbit/s, so that each video processor needs at least two gigabit network cards to meet the requirement of transmission speed. Further, since the first video processor 210 stores the display data corresponding to the first display module 410, the second video processor 220 stores the display data corresponding to the second display module 420, and each video processor includes two ports, the first display module 410 can be divided into a first sub-module 411 and a second sub-module 412 with the same area as the upper sub-module and the lower sub-module shown in fig. 2, and the second display module 420 can be divided into a third sub-module 421 and a fourth sub-module 422 with the same area as the upper sub-module and the lower sub-module. The first port and the second port of the first video processor 210 transmit the display data corresponding to the first sub-module 411 and the second sub-module 412, respectively, and the third port and the fourth port of the second video processor 220 transmit the display data corresponding to the third sub-module 421 and the fourth sub-module 422, respectively.
In this embodiment, the resolution of the display device is 1920 × 1080, that is, 1080 rows and 1920 columns. When the display device is divided, the display device can be divided into a left display module 410 and a right display module 420 which have the same area according to the number of the LED lamp points cascaded by the LED lamp belts. Generally, 256 or 512 light points are cascaded by one LED strip, and the light strips are cascaded along the column direction, so the number of pixel points in the column direction of the first display module 410 and the second display module 420 can be a common multiple of 256 and 512. Since the display apparatus includes 1920 columns and 1080 rows and both display modules include 1024 columns and 1024 rows, the first display module 410 and the second display module 420 overlap in the column direction. Taking the plane of the display device as the coordinate plane, the first row and the first column of the pixel points of the display device as the origin of coordinates, the starting point of the first display module 410 is (0,0), and the coordinate point of the second display module 420 is (896, 0). In the row direction, a portion exceeding 1024 rows (i.e., 1024 rows to 1080 rows) is not displayed. Since each leveling processor includes two network ports, the first display module 410 and the second display module 420 are equally divided into two sub-modules having the same area, so that the two network ports respectively transmit display data corresponding to the sub-modules, that is, the first network port and the second network port on the first video processor 210 are used for respectively transmitting display data corresponding to the first sub-module 411 and the second sub-module 412, and the third network port and the fourth network port on the second video processor 220 are used for respectively transmitting display data corresponding to the third sub-module 421 and the fourth sub-module 422.
In the embodiment, the display panel is divided into the plurality of sub-modules, and the different network ports of the video processor transmit the display data corresponding to the different sub-modules, so that the requirement on the processing capacity of the video processor can be reduced, and the equipment cost is reduced.
In one embodiment, referring to fig. 3, the first port, the second port, the third port and the fourth port are respectively and correspondingly connected to a group of branch control devices 300. Each group of partial control devices 300 comprises cascaded partial controllers 310, each cascaded partial controller 310 comprising an input net port and an output net port. The input port of the first sub-controller 310 located at the end of the sub-controller 300 is used to connect to the first port, the second port, the third port or the fourth port to receive the display data sent from the video processor, and the output port of the sub-controller 310 is connected to the input port of the next sub-controller 310. The sub-controller further comprises N ports, and each port is used for connecting the LED lamp strip.
When the first video processor 210 and the second video processor 220 transmit the display data through the first port, the second port, the third port, and the fourth port, the display data is packetized into a plurality of data packets and transmitted in packets. Each data packet comprises display data corresponding to M rows and N columns of pixel points. Wherein, M is an integer greater than or equal to 1, and N is the port number of the sub-controller, that is, the number of columns of the display data included in the data packet depends on the number of columns of the LED strip connected to the sub-controller. Generally, the number of rows and the number of columns are configured to be equal for ease of control. Since the sub-controller usually includes 16 ports, the data packet in this embodiment includes 16 rows and 16 columns of pixel points. When the first network port, the second network port, the third network port and the fourth network port transmit data packets, the four network ports transmit simultaneously, so that all parts of the display device display simultaneously. During transmission, as shown in fig. 4, the four network ports are simultaneously transmitted from top to bottom, and then each row is sequentially transmitted from left to right until the last row of data is completely transmitted.
Further, each sub-controller 310 includes a sub-control interface board and a sub-control core board, wherein the input network port, the output network port, and the N ports are all disposed on the sub-control interface board. The sub-control core board is connected to the sub-control interface board, and is configured to receive and store data transmitted by the sub-control interface board, and then send the data to the next-stage sub-controller 310. The sub-control core board comprises a sub-control processing module and a sub-control storage module, the sub-control processing module receives display data transmitted by the input network port and then controls the sub-control storage module to store the display data, and meanwhile, the sub-control storage module reads the display data of the LED lamp strip connected with the current sub-controller at the corresponding position on the display device, and the sub-control interface board controls the corresponding LED lamp strip to display. Meanwhile, the sub-control processing module further sends the received data packet to the sub-control gigabit network card, and the sub-control gigabit network card sends the data packet to the next sub-controller 310 through an output network port on the sub-control interface board, so that the sub-controller 310 can be reused as a switch.
In this embodiment, each sub-controller 310 may further be provided with a display screen and a key, so as to facilitate human-computer interaction during use. When a plurality of segment controllers 310 are cascaded, the key is used to number each segment controller 310. The display screen is used for displaying numbers, and the sub-controller 310 is configured to control the corresponding display position in the image when the display device displays the picture through the numbers. Each sub-controller 310 may further be provided with a wireless module for communicating with a server and transmitting the temperature, voltage, current, fault information, and the like of the LED strip connected to the sub-controller 310.
In one embodiment, the display control system further includes a switch disposed between the video processing apparatus and the sub-controllers, or between two adjacent sub-controllers. When the remote signal transmission is carried out, the display control system also comprises an optical fiber transmitter and an optical fiber receiver which are arranged between the video processing device and the switchboard. One end of the optical fiber transmitter is connected with the video processor, the other end of the optical fiber transmitter is connected with one end of the optical fiber receiver, the other end of the optical fiber receiver is connected with the switch, and data transmission is carried out between the video processor and the switch through the optical fiber transmitter and the optical fiber receiver.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display control system, comprising:
the display device comprises a first display module and a second display module, wherein the first display module and the second display module respectively comprise the LED lamp belts which are arranged in an array and have the same number;
a server for storing source display data;
a video distributor;
the video processing device comprises a first video processor and a second video processor, wherein the first video processor and the second video processor are connected with the server through a video distributor and are used for receiving the source display data and performing data conversion, data storage and data distribution, the first video processor is used for processing and storing the display data corresponding to the first display module, and the second video processor is used for processing and storing the display data corresponding to the second display module;
the multi-component control device receives the display data processed by the video processing device and controls the LED lamp strips correspondingly connected to the display device to display; each group of sub-control devices comprises cascaded sub-controllers, and each sub-controller is provided with a display screen and a key so as to carry out human-computer interaction in the using process; when a plurality of sub-controllers are cascaded, the keys are used for numbering each sub-controller; the display screen is also used for displaying numbers, and the sub-controllers corresponding to the numbers are configured to control corresponding display positions in images when the display device displays the images.
2. The display control system according to claim 1, wherein the first video processor comprises a first interface board and a first core board, the first interface board is connected to the first core board, the first interface board is configured to perform data conversion, and the first core board is configured to receive and store converted video data;
the second video processor comprises a second interface board and a second core board, the second interface board is connected with the second core board, the second interface board is used for data conversion, and the second core board is used for receiving and storing converted video data;
the first interface board is detachably connected with the first core board, and the second interface board is detachably connected with the second core board.
3. The display control system according to claim 2, wherein the first interface board includes a first decoding module, a first network port, and a second network port, the first core board includes a first processing module, a first storage module, a second storage module, a first gigabit network card, and a second gigabit network card, the first decoding module is configured to receive source display data and decode the source display data to obtain processed display data, the first processing module receives the processed display data and controls the first storage module and the second storage module to perform ping-pong storage, and the first processing module reads the display data in the first storage module and the second storage module and sends the display data to the first network port and the second network port through the first gigabit network card and the second gigabit network card;
the second interface board comprises a second decoding module, a third network port and a fourth network port, the second core board comprises a second processing module, a third storage module, a fourth storage module, a third gigabit network card and a fourth gigabit network card, the second decoding module is used for receiving the source display data and decoding the source display data to obtain processed display data, the second processing module receives the processed display data and controls the third storage module and the fourth storage module to perform ping-pong storage, and meanwhile, the second processing module reads the display data in the third storage module and the fourth storage module and sends the display data to the third network port and the fourth network port through the third gigabit network card and the fourth gigabit network card.
4. The display control system according to claim 3, wherein the first, second, third and fourth network ports are correspondingly connected to a group of component control devices;
the sub-controllers comprise input net ports and output net ports, the output net ports of the sub-controllers are used for being connected with the input net ports of the sub-controllers of the next stage, and the input net ports of the sub-controllers at the end parts of the sub-controllers of each group are used for being correspondingly connected with the first net ports, the second net ports, the third net ports and the fourth net ports.
5. The display control system according to claim 4, wherein each of the sub-controllers comprises N ports, each of the N ports being used for connecting a column of the LED strips.
6. The display control system of claim 5, wherein the first video processor and the second video processor are further configured to pack the display data into a plurality of packets, each of the packets comprising display data corresponding to M rows and N columns of pixel points, wherein M is an integer greater than or equal to 1.
7. The display control system according to claim 6, wherein the first, second, third and fourth ports transmit the data packets to the sub-controllers connected correspondingly.
8. The display control system according to claim 7, wherein the sub-controller comprises a sub-control interface board and a sub-control core board, the input network port, the output network port and the N ports are disposed on the sub-control interface board, and the sub-control interface board is connected to the sub-control core board, and is configured to receive the data packet and transmit the data packet to the sub-control core board;
the sub-control core board comprises a sub-control processing module, a sub-control memory and a sub-control gigabit network card, wherein the sub-control processing module controls the sub-control memory to store received data packets, and reads display data corresponding to the LED lamp strip connected with the current sub-controller from the sub-control memory so as to control the LED lamp strip to display;
the sub-control processing module also sends the data packet to the sub-control gigabit network card, and the sub-control gigabit network card sends the received data packet to a next sub-controller through the output network port;
the sub-control interface board is detachably connected with the sub-control core board.
9. The display control system according to claim 8, further comprising a switch provided between the video processing apparatus and the sub-control apparatus; and/or
The switch is arranged between two adjacent cascaded branch controllers.
10. The display control system according to claim 9, further comprising a fiber optic transmitter and a fiber optic receiver, which are disposed between the video processing device and the switch, wherein the fiber optic transmitter is connected to the video processing device, the fiber optic receiver is connected to the switch, and the video processing device and the switch perform data transmission via the fiber optic transmitter and the fiber optic receiver.
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| CN209497533U (en) * | 2019-04-30 | 2019-10-15 | 深圳市灰度软件有限公司 | A kind of video processor, display and video control system |
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Address after: 215200 north of Linhu Avenue, FenHu high tech Industrial Development Zone, Wujiang District, Suzhou City, Jiangsu Province Patentee after: Grand Canyon Lighting System (Suzhou) Co.,Ltd. Address before: 215200 north of Linhu Avenue, FenHu high tech Industrial Development Zone, Wujiang District, Suzhou City, Jiangsu Province Patentee before: STRONGLED LIGHTING SYSTEMS (SUZHOU) Co.,Ltd. |