CN205212951U - 4K display screen devices that show more - Google Patents

Abstract

The utility model discloses a 4K display device with multiple displays on one screen, which comprises four HDMI input interfaces, two HDMI output interfaces, an HDMI receiving module, an HDMI sending module, a video processing module, a DDR3 storage module and a power supply module, wherein The HDMI receiving module converts the video data transmitted by the four HDMI input interfaces into general RGB video data; the HDMI sending module converts the RGB video data into video data conforming to the HDMI format, and sends them to the 4K display through the HDMI interface for display. The utility model can transmit four different 1080P video sources to an ordinary 4K display screen for simultaneous display without other auxiliary software or multi-screen splicing, which is convenient for viewing. The utility model has the advantages of low cost and simple structure, and is more suitable for use in occasions where space is limited and multiple channels of video need to be viewed at the same time.

Description

A 4K display device with multiple displays on one screen

technical field

The utility model relates to the technical field of video display, in particular to a method and device for controlling image display on a 4K display screen, so as to simultaneously display different 1080P video sources on the 4K display screen.

Background technique

With the development of technology, the size of the display screen is getting larger and larger, and it also supports multi-channel source input signals. However, at the same time, the display screen can only display the signal input from one source. If you want to see other sources The content can only be realized by switching the source operation.

If you want to display multiple video sources at the same time, one method is to use multi-screen splicing, such as the large-scale background broadcasting system of a TV station. This method requires a huge investment, expensive processing equipment, and takes up a lot of space. For some It is not suitable for application scenarios with limited funds and space. Another method is the popular one-screen dual-display technology, which adopts 3D extension technology. When wearing glasses and without glasses, the video content seen is different, but this technology can only display two channels. Content, display effect Due to the flickering caused by the low frame rate of the picture and the inconvenience of wearing glasses, this technology has not received much market response.

With the maturity of 4K technology, 4K monitors and 4K TVs are becoming more and more recognized and welcomed by everyone. The resolution of a 4K display is equivalent to four times the resolution of 1080P high-definition video. In theory, four channels of 1080P high-definition video can be placed on one display at the same time. The use of 4K displays to realize high-definition video with multiple displays on one screen has broad prospects, and can be widely used in indoor advertising, community monitoring, vehicle real-time monitoring and other scenarios.

Utility model content

The purpose of the utility model is to provide a method and device for multiple displays on one screen of a 4K display in view of the deficiencies of the prior art, so as to realize simultaneous display of four independent 1080P video sources on the 4K display.

The purpose of this utility model is achieved through the following technical solutions:

A 4K display device with multiple displays on one screen, characterized in that the device includes: four HDMI input interfaces, two HDMI output interfaces, an HDMI receiving module, an HDMI sending module, a video processing module, a DDR3 storage module, and a power supply module. The power supply module is connected to the HDMI receiving module, HDMI sending module, video processing module and DDR3 storage module to provide power supply for each module; the four HDMI input interfaces are connected to the HDMI receiving module; the two HDMI output interfaces are connected to the HDMI sending module and the HDMI receiving module The HDMI sending module is respectively connected to the video processing module; the DDR3 storage module is connected to the video processing module.

The video processing module is FPGA.

The DDR3 storage module is two pieces of DDR3 storage particles, which cache image data.

The access end of the four-way HDMI input interface is connected to a video device that supports 1080P high-definition video source output, and the two-way HDMI output interface is connected to an ordinary 4K display to realize simultaneous display of four different input video sources on the 4K display ; The output video is exactly the same mirror copy, which increases the scalability of video output.

Compared with the prior art, the beneficial effects of the utility model are:

(1) Four channels of 1080P video images can be displayed on a 4K display at the same time, and the display does not need to support the splicing function, and the display does not need to run supporting software.

(2) The circuit structure is simple and the cost is low.

(3) Realize the seamless connection between different video images, and overcome the shortcomings of the gaps between images in the splicing screen.

Description of drawings

Fig. 1 is a structural block diagram of the utility model device;

Fig. 2 is a structural block diagram of the video processing module of the present utility model;

Fig. 3 is the working flow diagram of the device of the present invention.

detailed description

Referring to Fig. 1, the utility model comprises four-way HDMI input interface 1, two-way HDMI output interface 7, HDMI receiving module 2, HDMI sending module 6, video processing module 4, DDR3 memory module 5 and power module 3, described power module 3 Connect HDMI receiving module 2, HDMI sending module 6, video processing module 4 and DDR3 storage module 5, and provide power supply for each module; four HDMI input interfaces 1 connect HDMI receiving module 2; two HDMI output interfaces 7 connect HDMI sending The module 6, the HDMI receiving module 2, and the HDMI sending module 6 are respectively connected to the video processing module 4; the DDR3 storage module 5 is connected to the video processing module 4.

Referring to Fig. 2, the video processing module 4 of the utility model device is FPGA, and it comprises input FIFO module 4-1, input FIFO control module 4-2, input and output control module 4-3, output FIFO control module 4-4, output FIFO module 4-5, DDR3 driver module 4-6 and DDR3 interface module 4-7, the video processing module realizes that the data of four different channel RGB signals is stored in the corresponding address of the DDR3 storage module 5, and when output is required Output the RGB data in the DDR3 storage module 5 in the corresponding order, and generate the horizontal and vertical synchronous signals for driving the 4K display screen at the same time.

Referring to Fig. 3, taking PC as an example of HDMI high-definition video output source, describe the working process of the utility model device:

1) The HDMI interface 1 of the device receives the 1080P video source, and through the HDMI receiving module, the signals of different video sources are respectively decoded to restore the RGB data signals of different source signals, and the line and field synchronization signals, valid data signals and RGB data are combined Send to video processing module 4 namely FPGA.

2) When the FPGA detects that the field synchronization signal is valid and the initialization state of the current DDR3 storage module 5 is completed, the FPGA starts to receive the RGB video data signal and generates an address code.

3) The FPGA stores the received RGB data in the buffer areas of the DDR3 storage module 5 at different addresses according to different address codes.

4) When the HDMI sending module 6 allows output, the FPGA starts to output video data, first generates timing signals such as line and field synchronization signals and data valid signals according to the format timing of 4K video, and then according to the sequence of the corresponding areas displayed on the display screen , respectively read RGB data from the buffer area of the corresponding DDR3 storage module 5 , and transmit the timing signal and data to the HDMI sending module 6 .

5) The HDMI sending module 6 encodes the RGB data video signal into an HDMI format signal, and transmits it to the 4K video display through HDMI.

Claims (4)

1. A 4K display device with multiple displays on one screen, characterized in that the device includes: four HDMI input interfaces, two HDMI output interfaces, HDMI receiving module, HDMI sending module, video processing module, DDR3 storage module and power supply module , the power supply module is connected to the HDMI receiving module, the HDMI sending module, the video processing module and the DDR3 storage module to provide power supply for each module; the four HDMI input interfaces are connected to the HDMI receiving module; the two HDMI output interfaces are connected to the HDMI sending module, and the HDMI The receiving module and the HDMI sending module are respectively connected to the video processing module; the DDR3 storage module is connected to the video processing module. 2. The device according to claim 1, wherein the video processing module is an FPGA. 3 . The device according to claim 1 , wherein the DDR3 storage module is two pieces of DDR3 storage particles, and caches image data. 4 . 4. The device according to claim 1, characterized in that: the access end of the four-way HDMI input interface is connected to a video device that supports 1080P high-definition video source output, and the two-way HDMI output interface is connected to a 4K display screen to realize Simultaneously display four different input video sources on a 4K display.