CN216486418U - DP-AUX controller - Google Patents
DP-AUX controller Download PDFInfo
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- CN216486418U CN216486418U CN202123206659.7U CN202123206659U CN216486418U CN 216486418 U CN216486418 U CN 216486418U CN 202123206659 U CN202123206659 U CN 202123206659U CN 216486418 U CN216486418 U CN 216486418U
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Abstract
The utility model relates to a DP-AUX controller, which comprises an input module connected with a signal source and an output module connected with a display; the high-speed link of the signal source is directly communicated with the high-speed link of the display in the input module and the output module; the AUX link signal and the HPD signal of the signal source are communicated with the corresponding AUX link signal and HPD signal in the display; the method comprises the steps of sending an instruction sent by a signal source to a display, and sending an instruction responded by the display back to a main control module of the signal source; the AUX link signal interface and the HPD signal interface of the input module and the AUX link interface and the HPD interface of the output module are respectively connected with the main control module. The utility model discloses in, the user can manually use DP-AUX controller analog display to carry out DP-AUX communication with the signal source to make the audio and video signal of appointed link quantity of signal source output and link rate.
Description
Technical Field
The utility model relates to a DP-AUX communication control technical field.
Background
The DP interface (DisplayPort) is an image display interface that can support not only full high-definition display resolution (1920 × 1080), but also 4k resolution (3840 × 2160), and the latest 8k resolution (7680 × 4320). The DP interface has high transmission rate, is reliable and stable, and the signals transmitted by the DP interface include data Channel signals for transmitting images, and auxiliary Channel signals for transmitting image-related status and control information, and specifically include a Main Channel (Main Link), an auxiliary Channel (AUX Channel) and a Link routing (Link routing) for DisplayPort data transmission.
The auxiliary Channel (AUX Channel) is used as an independent bidirectional transmission auxiliary Channel in the DP interface, adopts an alternating current coupling differential transmission mode, is a bidirectional half-duplex transmission Channel, has a single directional rate of only about 1Mbit/s, and is used for transmitting setting and control instructions.
Uses of aux (auxiliary) include reading Extended Display Identification Data (EDID) to ensure proper transmission of DP signals; reading information of a DP interface supported by a display, such as the number of main channels and the transmission rate of a DP signal; setting various display configuration registers; the display status register is read.
Therefore, the signals of the DP interface can be correctly transmitted only by ensuring that the signals of the AUX are correct, and the liquid crystal modules with different DP protocols have different requirements on the amplitude of the output signals of the AUX. At present, when the liquid crystal module detection equipment detects the liquid crystal module, various liquid crystal module testing devices with matched AUX output amplitudes need to be designed aiming at the liquid crystal modules with different DP protocols, and the testing cost of the liquid crystal module is obviously improved.
DP (display port, DP for short) is a digital video interface standard developed by the alliance of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA), and DP can simultaneously transmit audio and video signals and is widely applied to set-top boxes, personal computers, displays and televisions. The existing DP line has the defects that the DP-AUX communication cannot be controlled, the communication speed and the link quantity of the existing DP line are determined by a signal source end and a signal receiving end, the high-speed signal link quantity and the high-speed signal link quantity cannot be artificially controlled, only fixed audio and video Data of Extended Display Identification Data (EDID) can be transmitted, and the EDID of the signal receiving end cannot be modified. In the DP communication, there are four links for high-speed signals, and four sets of optical signal transceivers and four optical fibers are required when optical signals are used for audio/video signal transmission. In some scenes, high video resolution and refresh rate are not needed, and only one link is needed to meet the use requirement at this time, so that the use cost is obviously improved in a mode of fixing the number of the links.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, providing a DP-AUX controller realizes that the display carries out DP-AUX communication with the signal source to make the audio and video signal of appointed link quantity of signal source output and link rate.
The purpose of the utility model is realized through the following technical scheme: a DP-AUX controller comprises an input module connected with a signal source and an output module connected with a display; the input module and the output module realize the direct connection of the high-speed link of the signal source and the high-speed link of the display; the AUX link signal and the HPD (hot plug detection) signal of the signal source are communicated with the corresponding AUX link signal and the HPD (hot plug detection) signal in the display; the method comprises the steps of sending an instruction sent by a signal source to a display, and sending an instruction responded by the display back to a main control module of the signal source; the AUX link signal interface and the HPD (hot plug detection) signal interface of the input module and the AUX link interface and the HPD (hot plug detection) interface of the output module are respectively connected with the main control module.
Further, in the DP-AUX controller described above: the display device further comprises an indicating module, wherein the indicating module comprises an LED controlled by the main control module, and the LED respectively indicates the EDID learning state, the high-speed signal link and the HPD (hot plug detection) state.
Further, in the DP-AUX controller described above: the system also comprises a switch control module, wherein the switch control module comprises a touch switch connected with the main control module, and the touch switch respectively controls EDID learning, the number of high-speed signal links and HPD (hot plug detection).
Further, in the DP-AUX controller described above: in the control module, the storage module comprises a 24C16 EEPROM.
The utility model discloses, under some scenes that only need a high-speed signal communication link, the user can manually use DP-AUX controller analog display to carry out DP-AUX communication with the signal source to make the audio frequency and video signal of appointed link quantity of signal source output and link rate. The DP-AUX controller is internally provided with the EDID, can use the internally provided EDID in the use process, can also use the output end EDID, and simultaneously supports the reading and the storage of the output end EDID and can be used as the internally provided EDID.
The utility model has the advantages that: and a DP-AUX controller is added at the DP signal source and the DP signal receiving end, and a user manually sets the number and the speed of DP high-speed links by using the DP-AUX controller according to a use scene and the cost condition of DP wires, and also can manually set EDID read by the signal source end.
Drawings
Fig. 1 is a schematic block diagram of the DP-AUX controller of the present invention.
Fig. 2 is a block diagram of the internal structure of the DP-AUX controller of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1 and 2: the DP-AUX controller comprises a main body, wherein the main body comprises a power supply module, a main control module, an input module, an indication module, a control module, a storage module and an output module; the main control module is electrically connected with the input module, the output module, the power supply module, the indication module, the control module and the storage module.
The power supply module comprises a 5V to 3.3V power supply module and a 5V power supply interface; the 5V to 3.3V power supply module is respectively electrically connected with the voltage input end of the MCU chip in the main control module and is connected with the output module; the 5V power interface is respectively electrically connected with the 5V-to-3.3V power module, the output module and the power interface indicator lamp.
The indicating module comprises an LED indicating lamp for indicating the EDID learning state, an LED indicating lamp for indicating the high-speed signal link and an LED indicating lamp for indicating the HPD (hot plug detection) state, and the LEDs are controlled by the main control module. The control module comprises an EDID learning touch control switch, a touch selection switch with high-speed signal link quantity and an HPD (hot plug detection) touch control switch, and the touch switches are respectively connected with the main control module. The memory module in the master control module comprises a 24C16 EEPROM. The output module comprises a DP output port; the input module high-speed link is connected with the output module high-speed link. The input module AUX link signal interface and the HPD (hot plug detection) signal interface are connected with the main control module AUX interface and the HPD (hot plug detection) interface; and the output module AUX link signal interface and the HPD (hot plug detection) signal interface are connected with the MCU main control module AUX interface and the HPD (hot plug detection) interface.
As shown in fig. 1 and 2: the DP-AUX controller comprises an input module connected with the signal source and an output module connected with the display; the high-speed link of the signal source is directly communicated with the high-speed link of the display in the input module and the output module; the AUX link signal and the HPD (hot plug detection) signal of the signal source are communicated with the corresponding AUX link signal and the HPD (hot plug detection) signal in the display; the method comprises the steps of sending an instruction sent by a signal source to a display, and sending an instruction responded by the display back to a main control module of the signal source; the AUX link signal interface and the HPD (hot plug detection) signal interface of the input module and the AUX link interface and the HPD (hot plug detection) interface of the output module are respectively connected with the main control module.
The input module comprises a DP input end interface, the indicating module comprises an EDID learning state indicating lamp, a high-speed signal link indicating lamp and an HPD (hot plug detection) state indicating lamp, the touch switch control module comprises an EDID learning control switch, a high-speed signal link quantity selecting switch and an HPD (hot plug detection) control switch, and the storage module comprises a 24C16 EEPROM; the output module comprises a DP output port; the input module high-speed link is connected with the output module high-speed link; the input module AUX link signal interface and the HPD (hot plug detection) signal interface are connected with the MCU main control module AUX interface and the HPD (hot plug detection) interface; the indication module is connected with a pin of the MCU main control module; the switch control module is connected with the pins of the MCU main control module; the storage module is connected with the pins of the MCU main control module; the output module high-speed link is connected with the input module high-speed link; and the output module AUX link signal interface and the HPD (hot plug detection) signal interface are connected with the MCU main control module AUX interface and the HPD (hot plug detection) interface.
After the DP-AUX controller is electrified, whether a display at a DP signal output end is connected or not is detected, when the display is detected to be connected, EDID of the display is automatically read and stored in an RAM space, and at the moment, the level state of an HPD (hot plug detection) pin at a signal source end follows the level state of the HPD (hot plug detection) pin given by the display; meanwhile, when the HPD (hot plug detection) level state is high, the signal source carries out AUX communication with the DP-AUX controller, the DP-AUX controller sends an instruction sent by the signal source to the display at the moment and waits for the display to respond to the instruction, and then the DP-AUX controller sends the instruction responded by the display back to the signal source; this corresponds to the signal source being directly connected to the display, which is the follow mode. After the DP-AUX controller is electrified, the display connection is not detected, the DP-AUX controller simulates the display to carry out AUX communication with the signal source, and then the signal source outputs DP audio and video signals.
In this embodiment, an AUX communication control device is added to the DP signal source and the DP signal receiving terminal, so that a user can manually control the DP audio/video signal and the EDID according to a use scene. The DP1.4 protocol is supported, the number of high-speed signal links supports 1, 2 and 4 paths, and the highest single-path 8.1Gbps rate is supported.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied, and any changes, modifications, substitutions, combinations, and simplifications made by those skilled in the art without departing from the spirit and principle of the present invention should be considered as equivalent replacement modes within the scope of the present invention.
Claims (4)
1. A DP-AUX controller, characterized by: comprises an input module connected with a signal source and an output module connected with a display;
the input module and the output module realize the direct connection of the high-speed link of the signal source and the high-speed link of the display;
the AUX link signal and the HPD signal of the signal source are communicated with the corresponding AUX link signal and HPD signal in the display; the method comprises the steps of sending an instruction sent by a signal source to a display, and sending an instruction responded by the display back to a main control module of the signal source;
the input module AUX link signal interface and the HPD signal interface, and the output module AUX link interface and the HPD interface are respectively connected with the main control module.
2. The DP-AUX controller of claim 1, wherein: the display device further comprises an indicating module, wherein the indicating module comprises an LED controlled by the main control module, and the LED respectively indicates the EDID learning state, the high-speed signal link and the HPD state.
3. The DP-AUX controller of claim 1, wherein: the system comprises a main control module, a switch control module and a touch switch, wherein the switch control module comprises the touch switch connected with the main control module, and the touch switch controls EDID learning, the number of high-speed signal links and HPD respectively.
4. The DP-AUX controller of claim 3, wherein: in the control module, the storage module comprises a 24C16 EEPROM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123206659.7U CN216486418U (en) | 2021-12-20 | 2021-12-20 | DP-AUX controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123206659.7U CN216486418U (en) | 2021-12-20 | 2021-12-20 | DP-AUX controller |
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| Publication Number | Publication Date |
|---|---|
| CN216486418U true CN216486418U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123206659.7U Active CN216486418U (en) | 2021-12-20 | 2021-12-20 | DP-AUX controller |
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| CN (1) | CN216486418U (en) |
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2021
- 2021-12-20 CN CN202123206659.7U patent/CN216486418U/en active Active
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