CN112037665A - Low-delay video transmission system for LED ball screen display - Google Patents
Low-delay video transmission system for LED ball screen display Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- H—ELECTRICITY
- 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
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- H—ELECTRICITY
- 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
- H04N5/265—Mixing
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- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Controls And Circuits For Display Device (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention discloses a low-delay video transmission system for LED spherical screen display, which belongs to the technical field of video transmission and comprises a cabinet end, an LED spherical screen end and an optical fiber transmission medium, and is characterized in that: the cabinet end comprises a vision computer, a video processor and an optical transmitter, and the LED dome screen end comprises an optical receiver, a video transmitter, a video receiver, a dome screen sphere frame and an LED display module; the video processor is connected with the vision computer, the optical transmitter is connected with the video processor, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver, the video receiver is connected with the video transmitter through the Ethernet, and the LED display module is connected with the video receiver through a data line. The invention is used for LED spherical screen display, not only can reduce the integral time delay of multi-channel high-definition video transmission, but also can support the 3D stereoscopic display function of the spherical screen and improve the display effect.
Description
Technical Field
The invention relates to the technical field of video transmission, in particular to a low-delay video transmission system for LED spherical screen display.
Background
The LED spherical screen display has the advantages of high brightness, long service life, large field angle, simple image processing and easy maintenance, and can bring sense experience of strong immersion and reality to a visual display system. Therefore, the training device is more and more widely paid attention to military simulation training. At present, a full-view LED ball screen display system for analog simulation training has higher requirements on image delay from a video source to display equipment, and the requirements are generally not more than 50 ms. Because the dome screen display system relates to multi-channel high-definition video transmission, the traditional video transmission method is difficult to meet the requirement of low time delay.
Chinese patent publication No. CN 111050107a, published as 2020, 04, and 21, discloses a wireless high-definition low-delay video transmission device, which is characterized by comprising an FPGA core board and a radio frequency board that are stacked;
the radio frequency board is integrated with:
the broadband radio frequency transceiving module is connected with the data antenna, receives the carrier signal through the data antenna and performs power amplification and filtering denoising on the carrier signal; communicating unidirectionally with a transceiver;
the narrow-band radio frequency transceiving module is connected with the signal antenna and used for transceiving a control signal through the signal antenna so as to control the communication direction between the wide-band radio frequency transceiving module and the transceiver;
the FPGA core board is integrated with:
the transceiver is used for carrying out direct frequency conversion on the filtered carrier signal;
the memory is divided into a wireless buffer area for storing demodulation data or modulation data, an image buffer area for storing coding and decoding images, an audio buffer area for storing coding and decoding audio and a buffer area for system operation;
the power supply chip is used for supplying power to each element on the FPGA core board;
the FPGA chip is used for realizing the functions of image coding and decoding and baseband modulation and demodulation;
the Ethernet PHY module is used for the transmission device to carry out Ethernet communication with the PC;
the FPGA chip is internally integrated with:
the encoding and decoding module is used for respectively encoding and decoding the image data and the audio data;
the wireless control module is used for carrying out instruction communication control with the narrow-band radio frequency transceiving module;
the acquisition input and output module is used for acquiring, receiving and outputting image data and audio data;
the processor is used for controlling the work of each functional module in the FPGA;
the modulation and demodulation module is used for demodulating load data from the frequency conversion data according to the pilot frequency and the synchronous code specified by the interface protocol, and respectively and correspondingly storing the load data in a wireless buffer area according to images and audios or taking out the data from the wireless buffer area for modulation;
the serial digital interface control module is used for controlling the acquisition input and output module to balance input and output image data according to an interface protocol;
the narrow-band UART control module is used for controlling the narrow-band radio frequency transceiving module to realize bidirectional narrow-band communication;
and the wireless control module is used for managing the modulation and demodulation module and the parameters, receiving the signals of the narrow-band UART control module and realizing the remote control of the parameters.
The wireless high-definition low-delay video transmission device disclosed in the patent document solves the problems of difficult control and debugging and inflexible configuration in the prior art. However, image data needs to be up-down converted and then wirelessly transmitted by an antenna, and the method is easily affected by electromagnetic interference and is particularly not suitable for airborne environment video transmission; the LED spherical screen display device is not suitable for LED spherical screen display, and particularly solves the problem that the whole delay is large in multi-channel high-definition video transmission related to LED spherical screen 3D stereoscopic display, and the display effect is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a low-delay video transmission system for LED spherical screen display.
The invention is realized by the following technical scheme:
the utility model provides a low time delay video transmission system for LED ball curtain shows, includes rack end, LED ball curtain end and optical fiber transmission medium, and LED ball curtain end passes through optical fiber transmission medium and is connected its characterized in that with the rack end: the cabinet end comprises a vision computer, a video processor and an optical transmitter, and the LED dome screen end comprises an optical receiver, a video transmitter, a video receiver, a dome screen sphere frame and an LED display module arranged on the dome screen sphere frame; the video processor is connected with the vision computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, and the transmission bandwidth of the optical fiber transmission medium is higher than 18 Gbps.
The video transmitter is one, is installed and fixed at the bottom of the spherical screen spherical frame and is used for performing interface conversion on a received video signal and converting an HDMI or DP signal into a gigabit Ethernet signal; video receiver and LED display module are a plurality of, and a plurality of video receiver distributing type are installed on ball curtain spheroid frame, and every video receiver carries out intercepting and buffer memory to the video signal who receives, then gives a plurality of LED modules in parallel and carries out video display.
And the vision computer is used for generating a synchronous high-definition plane image.
The video processor is used for dividing and processing the high-definition plane image generated by the view computer into a plurality of video channels, and each video channel supports a video image with 4K resolution and the refresh rate of 120 Hz; and completing geometric correction of the graph from a plane to a spherical surface by each divided video channel.
The optical transmitter is used for converting a video image signal with 4K resolution and a refresh rate of 120Hz into an optical signal.
And the optical receiver is used for converting the optical signal into a high-definition video signal.
The optical fiber transmission medium is used for transmitting high-definition video signals in a long distance.
The video transmitter is used for transmitting high-definition video signals to the plurality of video receivers.
And the video receiver is used for intercepting and caching the high-definition video signal.
The LED display module is used for displaying high-definition videos.
The working principle of the invention is as follows:
in the process of transmitting a high-definition video from a cabinet end to an LED dome screen end, a video processor can support geometric correction of a 3D stereoscopic display video image based on 4K @120Hz, and the delay caused by correction does not exceed 1 frame; the optical transmitter and the optical receiver directly realize electro-optical/photoelectric conversion without digital sampling, and the video transmitter also supports the forwarding of real-time video signals, so that the transmission delay introduced by the optical transmitter and the optical receiver is almost negligible. And the video receiver needs to buffer the transmitted video signal, and 1 frame of delay exists. The LED display module needs to wait for all the LED lamp panels to be ready and then perform synchronous video display, and 1 frame of time delay is also needed. Therefore, the high-definition video is transmitted from the cabinet end to the LED spherical screen end, the overall delay is not more than 3 frames, the overall delay of multi-channel high-definition video transmission can be effectively reduced, and the display effect is improved.
The beneficial effects of the invention are mainly shown in the following aspects:
1. the invention relates to a cabinet end, which comprises a visual computer, a video processor and an optical transmitter, wherein an LED spherical screen end comprises an optical receiver, a video transmitter, a video receiver, a spherical screen spherical frame and an LED display module arranged on the spherical screen spherical frame; the video processor is connected with the visual computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, in the process of transmitting the high-definition video from the cabinet end to the LED dome screen end, the video processor can support the geometric correction of 3D stereoscopic display video images based on 4K @120Hz, and the delay caused by the correction is not more than 1 frame; the optical transmitter and the optical receiver directly realize electro-optical/photoelectric conversion without digital sampling, meanwhile, the video transmitter also supports the forwarding of real-time video signals, the video receiver needs to buffer the transmitted video signals, and 1-frame delay exists. The LED display module needs to wait for all the LED lamp panels to be ready and then carry out synchronous video display, and also needs 1-frame delay; the video transmission system is used for LED spherical screen display, high-definition video is transmitted from the cabinet end to the LED spherical screen end, the integral delay time does not exceed 3 frames, compared with the prior art, the video transmission system not only can reduce the integral delay time of multi-channel high-definition video transmission, but also can support the 3D stereoscopic display function of the spherical screen, and improve the display effect.
2. Compared with a projector mode, the LED ball screen display mode has higher brightness, longer service life and larger field angle, and can greatly improve the display effect by matching with low time delay.
3. According to the invention, the cabinet end and the LED spherical screen end adopt the optical fiber transmission medium to carry out rapid long-distance transmission of videos, the transmission distance can support dozens or even hundreds of meters, and is far greater than the longest 15-meter transmission distance of the traditional HDMI or DP cable, the requirement of a common analog simulation environment is completely met, the introduced transmission delay can be ignored, the transmission bandwidth of the optical fiber transmission medium is up to more than 18 Gbps, and the LED spherical screen display quality is favorably ensured.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, wherein:
fig. 1 is a block diagram of a video transmission system according to the present invention.
Detailed Description
Example 1
Referring to fig. 1, a low-latency video transmission system for LED spherical screen display includes a cabinet end, an LED spherical screen end and an optical fiber transmission medium, where the LED spherical screen end is connected with the cabinet end through the optical fiber transmission medium, the cabinet end includes a view computer, a video processor and an optical transmitter, and the LED spherical screen end includes an optical receiver, a video transmitter, a video receiver, a spherical screen sphere frame and an LED display module disposed on the spherical screen sphere frame; the video processor is connected with the vision computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, and the transmission bandwidth of the optical fiber transmission medium is 20 Gbps.
The cabinet end comprises a visual computer, a video processor and an optical transmitter, and the LED dome screen end comprises an optical receiver, a video transmitter, a video receiver, a dome screen sphere frame and an LED display module arranged on the dome screen sphere frame; the video processor is connected with the visual computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, in the process of transmitting the high-definition video from the cabinet end to the LED dome screen end, the video processor can support the geometric correction of 3D stereoscopic display video images based on 4K @120Hz, and the delay caused by the correction is not more than 1 frame; the optical transmitter and the optical receiver directly realize electro-optical/photoelectric conversion without digital sampling, meanwhile, the video transmitter also supports the forwarding of real-time video signals, the video receiver needs to buffer the transmitted video signals, and 1-frame delay exists. The LED display module needs to wait for all the LED lamp panels to be ready and then carry out synchronous video display, and also needs 1-frame delay; the video transmission system is used for LED spherical screen display, high-definition video is transmitted from the cabinet end to the LED spherical screen end, the integral delay time does not exceed 3 frames, compared with the prior art, the video transmission system not only can reduce the integral delay time of multi-channel high-definition video transmission, but also can support the 3D stereoscopic display function of the spherical screen, and improve the display effect.
Example 2
Referring to fig. 1, a low-latency video transmission system for LED spherical screen display includes a cabinet end, an LED spherical screen end and an optical fiber transmission medium, where the LED spherical screen end is connected with the cabinet end through the optical fiber transmission medium, the cabinet end includes a view computer, a video processor and an optical transmitter, and the LED spherical screen end includes an optical receiver, a video transmitter, a video receiver, a spherical screen sphere frame and an LED display module disposed on the spherical screen sphere frame; the video processor is connected with the vision computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, and the transmission bandwidth of the optical fiber transmission medium is 22 Gbps.
The video transmitter is one, is installed and fixed at the bottom of the spherical screen spherical frame and is used for performing interface conversion on a received video signal and converting an HDMI or DP signal into a gigabit Ethernet signal; video receiver and LED display module are a plurality of, and a plurality of video receiver distributing type are installed on ball curtain spheroid frame, and every video receiver carries out intercepting and buffer memory to the video signal who receives, then gives a plurality of LED modules in parallel and carries out video display.
Compared with a projector mode, the LED ball screen display mode has higher brightness, longer service life and larger field angle, is matched with low time delay, and can greatly improve the display effect.
Example 3
Referring to fig. 1, a low-latency video transmission system for LED spherical screen display includes a cabinet end, an LED spherical screen end and an optical fiber transmission medium, where the LED spherical screen end is connected with the cabinet end through the optical fiber transmission medium, the cabinet end includes a view computer, a video processor and an optical transmitter, and the LED spherical screen end includes an optical receiver, a video transmitter, a video receiver, a spherical screen sphere frame and an LED display module disposed on the spherical screen sphere frame; the video processor is connected with the vision computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, and the transmission bandwidth of the optical fiber transmission medium is 25 Gbps.
The video transmitter is one, is installed and fixed at the bottom of the spherical screen spherical frame and is used for performing interface conversion on a received video signal and converting an HDMI or DP signal into a gigabit Ethernet signal; video receiver and LED display module are a plurality of, and a plurality of video receiver distributing type are installed on ball curtain spheroid frame, and every video receiver carries out intercepting and buffer memory to the video signal who receives, then gives a plurality of LED modules in parallel and carries out video display.
And the vision computer is used for generating a synchronous high-definition plane image.
The video processor is used for dividing and processing the high-definition plane image generated by the view computer into a plurality of video channels, and each video channel supports a video image with 4K resolution and the refresh rate of 120 Hz; and completing geometric correction of the graph from a plane to a spherical surface by each divided video channel.
The optical transmitter is used for converting a video image signal with 4K resolution and a refresh rate of 120Hz into an optical signal.
And the optical receiver is used for converting the optical signal into a high-definition video signal.
The optical fiber transmission medium is used for transmitting high-definition video signals in a long distance.
The video transmitter is used for transmitting high-definition video signals to the plurality of video receivers.
And the video receiver is used for intercepting and caching the high-definition video signal.
The LED display module is used for displaying high-definition videos.
The cabinet end and the LED ball screen end adopt optical fiber transmission media to carry out rapid long-distance transmission of videos, transmission distance can support dozens or even up to a hundred meters, is far greater than the longest 15 meters transmission distance of the traditional HDMI or DP cable, completely meets the requirements of common analog simulation environment, introduced transmission delay can be ignored, the transmission bandwidth of the optical fiber transmission media is up to more than 18 Gbps, and the LED ball screen display quality is favorably ensured.
Claims (10)
1. The utility model provides a low time delay video transmission system for LED ball curtain shows, includes rack end, LED ball curtain end and optical fiber transmission medium, and LED ball curtain end passes through optical fiber transmission medium and is connected its characterized in that with the rack end: the cabinet end comprises a vision computer, a video processor and an optical transmitter, and the LED dome screen end comprises an optical receiver, a video transmitter, a video receiver, a dome screen sphere frame and an LED display module arranged on the dome screen sphere frame; the video processor is connected with the vision computer through an HDMI or DP interface, the optical transmitter is connected with the video processor through an HDMI or DP interface, the optical receiver is connected with the optical transmitter through an optical fiber transmission medium, the video transmitter is connected with the optical receiver through an HDMI or DP interface, the video receiver is connected with the video transmitter through an Ethernet, the LED display module is connected with the video receiver through a data line, and the transmission bandwidth of the optical fiber transmission medium is higher than 18 Gbps.
2. The low-latency video transmission system for the LED dome display of claim 1, wherein: the video transmitter is one, is installed and fixed at the bottom of the spherical screen spherical frame and is used for performing interface conversion on a received video signal and converting an HDMI or DP signal into a gigabit Ethernet signal; video receiver and LED display module are a plurality of, and a plurality of video receiver distributing type are installed on ball curtain spheroid frame, and every video receiver carries out intercepting and buffer memory to the video signal who receives, then gives a plurality of LED modules in parallel and carries out video display.
3. The low-latency video transmission system for the LED dome display of claim 2, wherein: and the vision computer is used for generating a synchronous high-definition plane image.
4. The low-latency video transmission system for the LED dome display of claim 3, wherein: the video processor is used for dividing and processing the high-definition plane image generated by the view computer into a plurality of video channels, and each video channel supports a video image with 4K resolution and the refresh rate of 120 Hz; and completing geometric correction of the graph from a plane to a spherical surface by each divided video channel.
5. The low-latency video transmission system for the LED dome display of claim 4, wherein: the optical transmitter is used for converting a video image signal with 4K resolution and a refresh rate of 120Hz into an optical signal.
6. The low-latency video transmission system for the LED dome display of claim 5, wherein: and the optical receiver is used for converting the optical signal into a high-definition video signal.
7. The low-latency video transmission system for the LED dome display of claim 6, wherein: the optical fiber transmission medium is used for transmitting high-definition video signals in a long distance.
8. The low-latency video transmission system for the LED dome display of claim 7, wherein: the video transmitter is used for transmitting high-definition video signals to the plurality of video receivers.
9. The system of claim 8, wherein the video transmission system with low latency for LED dome display comprises: and the video receiver is used for intercepting and caching the high-definition video signal.
10. The low-latency video transmission system for the LED dome display of claim 9, wherein: the LED display module is used for displaying high-definition videos.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2019111397718 | 2019-11-20 | ||
| CN201911139771 | 2019-11-20 |
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| CN201911189671.6A Withdrawn CN110706604A (en) | 2019-11-20 | 2019-11-28 | Immersive full-view LED spherical screen display and control system |
| CN202010982258.1A Pending CN112037665A (en) | 2019-11-20 | 2020-09-17 | Low-delay video transmission system for LED ball screen display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435627A (en) * | 2020-12-07 | 2021-03-02 | 成都成电光信科技股份有限公司 | LED display control system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259047A (en) * | 2020-12-08 | 2021-01-22 | 成都成电光信科技股份有限公司 | LED spherical screen display method |
| CN112233048B (en) * | 2020-12-11 | 2021-03-02 | 成都成电光信科技股份有限公司 | Spherical video image correction method |
| CN112702539B (en) * | 2021-03-24 | 2021-11-19 | 成都成电光信科技股份有限公司 | Driving method of LED spherical screen |
| CN116741061B (en) * | 2023-08-14 | 2023-11-14 | 长春希达电子技术有限公司 | High-density small-spacing LED (light-emitting diode) spherical screen and design method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435627A (en) * | 2020-12-07 | 2021-03-02 | 成都成电光信科技股份有限公司 | LED display control system |
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| Publication number | Publication date |
|---|---|
| CN110706604A (en) | 2020-01-17 |
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