CN220401809U

CN220401809U - Image sending device, LED sending card and display system

Info

Publication number: CN220401809U
Application number: CN202322123467.2U
Authority: CN
Inventors: 欧阳其平; 王星辰
Original assignee: Shenzhen Huidu Technology Co ltd
Current assignee: Shenzhen Huidu Technology Co ltd
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2024-01-26
Anticipated expiration: 2033-08-08

Abstract

The utility model discloses an image transmitting device, an LED transmitting card and a display system. The image transmitting device comprises an HDMI receiving module, an information converting module and a processing module; the HDMI receiving module is connected with the information converting module and is configured to receive the image information and send the image information to the information converting module; the information conversion module comprises a parallel communication interface which is connected with the processing module, and is configured to convert image information into RGB data and send the two RGB data to the processing module in a double-edge transmission mode in each sending period; so that the processing module transmits the RGB data to the image receiving apparatus. The technical scheme of the utility model improves the transmission bandwidth and resolution between the information conversion module and the processing module.

Description

Image sending device, LED sending card and display system

Technical Field

The present utility model relates to the field of display technologies, and in particular, to an image sending device, an LED sending card, and a display system.

Background

A light-emitting diode (LED) display screen is widely used for displaying various information such as text, images, and video.

When the LED display screen displays, the image transmitting device is required to receive the image signal of the computer, the image signal of the computer is converted into a control signal, the image receiving device receives the control signal and then transmits the control signal to the driving module, and the driving module controls the LED display screen to emit light according to the control signal.

The computer output interface is generally a high-definition multimedia interface (High Definition Multimedia Interface, HDMI) output interface, and when the processor for converting the image signal of the image transmitting apparatus cannot directly receive the HDMI signal, a conversion device is required to convert the HDMI signal into RGB data and transmit the RGB data to the processor. However, when the existing conversion device outputs RGB data, the RGB data is generally 24 bits of data, and the amount of data transferred each time is small, and generally 1080p output is supported, so that the resolution of the output image of the image transmission device is low.

Disclosure of Invention

The utility model provides an image sending device, an LED sending card and a display system, which are used for solving the problem that the resolution of an image output by the image sending device is low.

According to an aspect of the present utility model, there is provided an image transmission apparatus including: the device comprises an HDMI receiving module, an information converting module and a processing module;

the HDMI receiving module is connected with the information conversion module and is configured to receive image information and send the image information to the information conversion module;

the information conversion module comprises a parallel communication interface, the parallel communication interface is connected with the processing module, the information conversion module is configured to convert the image information into RGB data, and two RGB data are sent to the processing module in a double-edge transmission mode in each sending period; so that the processing module transmits the RGB data to an image receiving apparatus.

Optionally, the information conversion module includes a GSV2015 chip; the parallel communication interface is a TTL interface.

Optionally, the processing module comprises a field programmable gate array device.

Optionally, the parallel communication interface is in communication with a plurality of data communication interfaces and a plurality of control signals of the field programmable gate array device; wherein the data communication interface is configured to transmit the RGB data, and the control signal communication interface is configured to transmit a control signal.

Alternatively, each of the RGB data includes 8-bit R data, 8-bit G data, and 8-bit B data.

Optionally, the data communication interface and the control signal communication interface are IO interfaces of the field programmable gate array device.

Optionally, the processing module further includes a storage unit;

the storage unit is connected with the field programmable gate array device, and the storage unit is configured to store the RGB data.

Optionally, the memory unit includes a double rate synchronous dynamic random access memory.

According to another aspect of the present utility model, there is provided an LED transmitting card including the image transmitting apparatus according to any one of the embodiments of the present utility model.

According to another aspect of the present utility model, there is provided a display system, including the LED transmitting card according to any one of the embodiments of the present utility model, further including an LED receiving card, a driving module, and a display device;

the LED receiving card is connected with the LED transmitting card, the LED receiving card is connected with the driving module, and the driving module is connected with the display device; the LED receiving card is configured to receive the control information sent by the LED sending card and send the control information to the driving module, so that the driving module controls the display device to display images.

According to the technical scheme, the parallel communication interface of the information conversion module is connected with the processing module, so that the information conversion module and the processing module are in parallel communication, the transmission speed is high, RGB data can be directly transmitted to the processing module without differential processing, the processing module does not need to use devices with higher configuration, and cost reduction is facilitated. The information conversion module is configured to send two RGB data to the processing module in a double-edge transmission mode in each sending period, so that the final transmission bandwidth is 4 times of the original transmission bandwidth, 4K resolution can be supported, and the transmission bandwidth and resolution are improved.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an image transmitting apparatus according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of still another image transmission apparatus according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a display system according to an embodiment of the present utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic structural diagram of an image transmission device according to an embodiment of the present utility model, and referring to fig. 1, the image transmission device includes: an HDMI receiving module 110, an information converting module 120, and a processing module 130; the HDMI receiving module 110 is connected to the information converting module 120, and the HDMI receiving module 110 is configured to receive the image information and send the image information to the information converting module 120; the information conversion module 120 includes a parallel communication interface 121, the parallel communication interface 121 is connected to the processing module 130, the information conversion module 120 is configured to convert image information into RGB data, and send two RGB data to the processing module 130 in a double-edge transmission manner in each sending period; so that the processing module 130 transmits the RGB data to the image receiving apparatus.

Wherein the image transmission device can be applied to an LED transmission card. The HDMI receiving module 110 includes, for example, an HDMI interface, an HDMI receiving chip, and peripheral circuits thereof, and the HDMI receiving module 110 can receive image information from a computer or other devices through the HDMI interface. The information conversion module 120 may obtain the image information in the HDMI receiving module 110, where the format of the image information is HDMI format, the information conversion module 120 converts the image information in HDMI format into RGB data, so that the processing module 130 is convenient to receive the RGB data corresponding to the image information, the processing module 130 sends the RGB data to the image receiving device, so that the image receiving device sends the RGB data to the driving module of the display screen, and the driving module may drive the red light emitting diode, the green light emitting diode and the blue light emitting diode in the display screen to emit light according to the RGB data, so that the display screen displays the picture corresponding to the RGB data. The RGB data is RGB format data, where the RGB data includes R data, G data and B data, where the R data is, for example, a light emitting intensity value of a red light emitting diode, the G data is, for example, a light emitting intensity value of a green light emitting diode, the B data is, for example, a light emitting intensity value of a light emitting diode, the intensity value is generally 0-255, and when the intensity value is 0, the light emitting intensity is the largest, and the light emitting diode is the brightest; at an intensity value of 255, the luminous intensity is minimal, for example, no light is emitted; alternatively, at an intensity value of 0, the luminous intensity is minimal, e.g., no light is emitted; when the intensity value is 255, the luminous intensity is maximum, and the light emitting diode is brightest; other intensity ranges are also possible. Therefore, the luminous intensities of the red light emitting diode, the green light emitting diode and the blue light emitting diode in the display screen are conveniently controlled by converting the image information into RGB data, so that the display screen can display pictures corresponding to the image information.

Specifically, by setting the parallel communication interface 121 of the information conversion module 120 to connect with the processing module 130, the information conversion module 120 performs parallel communication with the processing module 130, the transmission speed is faster than that of serial communication, and RGB data can be directly transmitted to the processing module 130 without differential processing, so that the processing module 130 does not need to use a device with high configuration, which is beneficial to reducing cost.

Specifically, when the RGB data is 24-bit data, when one RGB data is transmitted in each transmission period, the transmission bandwidth is smaller, the transmission data amount is smaller, that is, the frame rate of the corresponding image is smaller, and the resolution of the corresponding image is smaller, so that only an image with 1080p resolution can be supported. The transmission mode of the information conversion module 120 is configured to transmit two RGB data to the processing module 130 in a double-edge transmission mode in each transmission period, wherein each transmission period transmits two RGB data, the bandwidth is increased by 2 times as much as the original bandwidth when the data transmitted in each transmission period is 48 bits, and then the data is transmitted in a double-edge transmission mode, namely, the bandwidth is increased by one time again when the data is transmitted in each transmission period, so that the final transmission bandwidth is 4 times as much as the original bandwidth, 4K resolution can be supported, and the transmission bandwidth and resolution are improved.

In addition, the transmission mode of the information conversion module 120 is configured to transmit in a double-edge transmission manner, so that 4 RGB data are transmitted for each transmission period to improve the resolution, which is beneficial to reducing the wiring and reducing the number of interfaces of the processing module 130. In addition, the clock frequency does not need to be increased, and unstable transmission caused by the change of the clock frequency can be avoided.

It should be noted that, the transmission mode (transmission mode) of the information conversion module 120 may be preconfigured, and the configuration of the transmission mode of the information conversion module 120 may be performed by using a host computer, a single chip microcomputer, a field programmable gate array device, or other control devices, which is not limited in this embodiment.

According to the technical scheme, the parallel communication interface of the information conversion module is connected with the processing module, so that the information conversion module and the processing module are in parallel communication, the transmission speed is high, RGB data can be directly transmitted to the processing module, differential processing is not needed, the processing module does not need to use devices with higher configuration, and cost reduction is facilitated. The information conversion module is configured to send two RGB data to the processing module in a double-edge transmission mode in each sending period, so that the final transmission bandwidth is 4 times of the original transmission bandwidth, 4K resolution can be supported, and the transmission bandwidth and resolution are improved.

On the basis of the above technical solution, fig. 2 is a schematic structural diagram of still another image sending apparatus according to an embodiment of the present utility model, optionally, referring to fig. 2, the information conversion module 120 includes a GSV2015 chip 122; the parallel communication interface 121 is a TTL interface.

Specifically, the GSV2015 chip 122 is an HDMI receiving chip, and the GSV2015 chip 122 can receive the image information of the HDMI receiving module 110 and convert the image information of the HDMI receiving module 110 into RGB data, so that the processing module 130 is not required to convert the RGB data, and the operation amount of the processing module 130 is reduced. The GSV2015 chip 122 includes a Transistor-Transistor Logic (TTL) interface, which is a parallel communication interface, and a low voltage differential signaling (Low Voltage Differential Signaling, LVDS) interface, which is a serial communication interface. When signals are output through the LVDS interface, differential processing is needed to receive the signals. By connecting the TTL interface with the processing module 130, the processing module 130 does not need to perform differential processing, so that the operation amount of the processing module 130 is reduced, and the processing module 130 does not need to use a device with high configuration, which is beneficial to reducing the cost and improving the applicability of the image transmitting device.

It is understood that the information conversion module 120 may further include peripheral circuits of the GSV2015 chip 122, such as a power supply circuit.

Optionally, the processing module 130 includes a field programmable gate array device 131.

Specifically, the field programmable gate array (Field Programmable Gate Array, FPGA) device 131 is a programmable logic array device, and can receive RGB data, process the RGB data, and send the RGB data to the image receiving apparatus, so that the driving module can control the display of the display screen according to the RGB data.

It is appreciated that the processing module 130 may also include peripheral circuitry of the field programmable gate array device 131, such as clock circuitry and power supply circuitry including the field programmable gate array device 131.

Alternatively, as shown in fig. 2, the parallel communication interface 121 is connected with a plurality of data communication interfaces A1 and a plurality of control signal communication interfaces A2 of the field programmable gate array device 131; wherein the data communication interface A1 is configured to transmit RGB data, and the control signal communication interface A2 is configured to transmit control signals.

Specifically, the information conversion module 120 sends the RGB data and the control signal to the control signal communication interface A2 of the processing module 130, so as to control the data sending process. The control signals include, for example, a clock signal, a row synchronization signal, a field synchronization signal, and a data valid signal. By transmitting the clock signal, the information conversion module 120 performs dual-edge transmission according to the rising edge and the falling edge of the clock signal, that is, two RGB data are transmitted at both the rising edge and the falling edge of the clock signal, thereby realizing transmission of two data in one transmission cycle. The above-mentioned transmission period is the clock period of the clock signal. By sending the line synchronization signal, in the process of transmitting the RGB data, each line of RGB data is sent to send a line synchronization signal, so that the RGB data corresponding to the image information can be conveniently sent to the processing module 130 line by line, and when the display screen displays, the light emitting diodes are turned on according to the line, so that the picture corresponding to the RGB data can be displayed. By sending the field synchronizing signal, in the process of transmitting the RGB data, each frame of RGB data is sent, one field synchronizing signal is sent, so that RGB data corresponding to image information can be conveniently sent to the processing module 130 frame by frame, and when the display screen displays, the light emitting diode is turned on according to the frame, and a picture corresponding to the RGB data can be displayed according to the frame, so that a video image is displayed. By sending the data valid signal, the processing module 130 knows whether the RGB data transmitted at this time is valid, and when the data valid signal is received, the processing module 130 sends the received RGB data to the image receiving device, so that the image receiving device sends the RGB data to the display screen, and the display screen can accurately display the image.

Alternatively, each RGB data includes 8-bit R data, 8-bit G data, and 8-bit B data. That is, the RGB data is RGB888 data.

Specifically, the display screen is an LED display screen, the LED display screen includes a red light emitting diode, a green light emitting diode and a blue light emitting diode, the R data is transmitted to the processing module 130 by the processing module 130, the processing module 130 transmits the R data to the image receiving device, the image receiving device transmits the R data to the driving module, so that the driving module can control the light emitting brightness and/or the light emitting duration of the red light emitting diode, the G data is transmitted to the processing module 130 by the transmitting G data, the G data is transmitted to the image receiving device by the image receiving device, the driving module 130 can control the light emitting brightness and/or the light emitting duration of the blue light emitting diode, and the image receiving device is convenient to drive the display screen to display an image corresponding to image information.

Alternatively, as shown in fig. 2, the data communication interface A1 and the control signal communication interface A2 are IO interfaces of the field programmable gate array device 131.

Specifically, by connecting the parallel communication interface 121 with the IO interface (i.e., the GPIO interface in fig. 2) of the field programmable gate array device 131, a bus interface or other types of interfaces are not required, so that the configuration of the FPGA may not need to be higher, which is beneficial to reducing the cost and improving the applicability of the image transmission apparatus.

Optionally, as shown in fig. 2, the processing module 130 further includes a storage unit 132; the storage unit 132 is connected to the field programmable gate array device 131, and the storage unit 133 is configured to store RGB data.

Specifically, by setting the storage unit 132, the RGB data sent by the information conversion module 120 can be temporarily stored, so that when the amount of the sent data is large, the processing module 130 cannot timely send the data to the image receiving device to cause data confusion or loss of the data, thereby ensuring the accuracy of data transmission, and further enabling the display screen to accurately display the image.

Alternatively, referring to FIG. 2, the memory unit 132 includes a double rate synchronous dynamic random access memory.

Specifically, the double rate synchronous dynamic random access memory (DDR SDRAM) is a storage space that the field programmable gate array device 131 can directly address, and can quickly access data, so that after RGB data is stored, the RGB data can be quickly read and sent to the image receiving device, and synchronous receiving and sending are realized, thereby improving the sending and receiving rate of the field programmable gate array device 131, and improving the accuracy of data sent to the image receiving device. It should be noted that, the number of DDR s may be determined according to the amount of data to be transmitted and stored, and the present embodiment is not limited thereto.

The embodiment also provides an LED transmitting card, which includes the image transmitting device provided by any of the above embodiments, so that the LED transmitting card has the same beneficial effects as the image transmitting device provided by any of the above embodiments, and will not be described herein.

The present embodiment also provides a display system, and fig. 3 is a schematic structural diagram of a display system provided in the embodiment of the present utility model, optionally, as shown in fig. 3, the display system includes an LED transmitting card 10 provided in any of the foregoing embodiments, and further includes an LED receiving card 20, a driving module 30, and a display device 40; the LED receiving card 20 is connected with the LED transmitting card 10, the LED receiving card 20 is connected with the driving module 30, and the driving module 30 is connected with the display device 40; the LED receiving card 20 is configured to receive the control information transmitted from the LED transmitting card 10 and transmit the control information to the driving module 30, so that the driving module 30 controls the display device 40 to display an image.

Specifically, the LED receiving card 20 includes, for example, the image receiving apparatus described above, and the display device 40 is, for example, an LED display screen including a plurality of red light emitting diodes, a plurality of green light emitting diodes, and a plurality of blue light emitting diodes. The LED receiving card 20 may receive the RGB data transmitted from the LED transmitting card 10 and transmit the RGB data to the driving module 30, and the driving module 30 may drive the light emitting diodes in the display device 40 to emit light according to the RGB data, for example, control the light emitting brightness and/or the light emitting duration of the light emitting diodes according to the RGB data, so that the display device 40 displays the target image picture.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims

1. An image transmission apparatus, comprising: the device comprises an HDMI receiving module, an information converting module and a processing module;

2. The image transmission apparatus according to claim 1, wherein the information conversion module includes a GSV2015 chip; the parallel communication interface is a TTL interface.

3. The image transmitting apparatus according to claim 1, wherein the processing module comprises a field programmable gate array device.

4. The image transmitting apparatus according to claim 3, wherein the parallel communication interface is connected to a plurality of data communication interfaces and a plurality of control signal communication interfaces of the field programmable gate array device; wherein the data communication interface is configured to transmit the RGB data, and the control signal communication interface is configured to transmit a control signal.

5. The image transmitting apparatus according to claim 1, wherein each of the RGB data includes 8-bit R data, 8-bit G data, and 8-bit B data.

6. The image transmitting apparatus according to claim 4, wherein,

the data communication interface and the control signal communication interface are IO interfaces of the field programmable gate array device.

7. The image transmission apparatus according to claim 3, wherein the processing module further comprises a storage unit;

8. The image transmitting apparatus according to claim 7, wherein the storage unit includes a double rate synchronous dynamic random access memory.

9. An LED transmitting card comprising the image transmitting apparatus according to any one of claims 1 to 8.

10. A display system comprising the LED transmitting card of claim 9, further comprising an LED receiving card, a driving module, and a display device;