CN113946305A - Display system, display method, computer device and storage medium - Google Patents

Display system, display method, computer device and storage medium Download PDF

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Publication number
CN113946305A
CN113946305A CN202111207729.2A CN202111207729A CN113946305A CN 113946305 A CN113946305 A CN 113946305A CN 202111207729 A CN202111207729 A CN 202111207729A CN 113946305 A CN113946305 A CN 113946305A
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interface
display
display panel
type
mode
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魏浩
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BOE Technology Group Co Ltd
K Tronics Suzhou Technology Co Ltd
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BOE Technology Group Co Ltd
K Tronics Suzhou Technology Co Ltd
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Priority to CN202111207729.2A priority Critical patent/CN113946305A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1431—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using a single graphics controller
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0016—Inter-integrated circuit (I2C)

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Graphics (AREA)
  • Human Computer Interaction (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The invention discloses a display system, a display method, a computer device and a storage medium, wherein the display system comprises: the display panel comprises a display controller and a first display panel which are connected by a Type-c connecting line, and a first display panel and a second display panel which are connected by a DP signal line, wherein the first display panel receives display data sent by the display controller according to the Type-c connecting line connected with a Type-c interface of the first display panel, and a main control board and the DP signal line of the first display panel form a daisy chain which is connected with the second display panel and takes the Type-c interface of the first display panel as a signal source, so that the first display panel and the second display panel display the display data. In the embodiment, the daisy chain function is realized between the first display panel and the second display panel by taking the signal source of the upper row port Type-c as the input end to transmit the video data, and the daisy chain display device has the advantages of simple structure, low cost and practical application value.

Description

Display system, display method, computer device and storage medium
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display system, a display method, a computer device, and a storage medium.
Background
Currently, as the daisy chain function of the display can expand the screen of the PC, video data transmission by the daisy chain function of the display is widely adopted in the display system.
In the prior art, the output of the main control chip scaler IC is usually used as a signal source for the daisy chain function, and then data output is realized through the display interface DP. However, for the case that the scaler IC does not support the daisy chain function, how to implement the daisy chain function becomes an urgent problem to be solved.
Disclosure of Invention
In order to solve at least one of the above problems, a first embodiment of the present invention provides a display system including: a display controller, a first display panel, a second display panel, a Type-c connecting line connecting the display controller and the first display panel, and a DP signal line connecting the first display panel and the second display panel, wherein
The display controller comprises a first Type-c interface and is connected with one end of the Type-c connecting line;
the first display panel comprises a main control panel, a second Type-c interface connected with the other end of the Type-c connecting line, and a first DP interface connected with one end of the DP signal line;
the second display panel comprises a second DP interface connected with the other end of the DP signal line;
the first display panel receives display data sent by a first Type-c interface of the display controller according to the second Type-c interface, a daisy chain taking the second Type-c interface as a signal source is formed through the main control board and the DP signal line, and the first display panel and the second display panel display the display data.
For example, some embodiments of the present application provide a display system wherein the main control board of the first display panel selects the first bandwidth mode or the second bandwidth mode according to the received bandwidth setting, wherein
When the first display panel is in the first bandwidth mode, the second Type-c interface is set as: transmitting the display data by using a 4-channel USB (universal serial bus) extreme speed interface and transmitting downlink data by using a USB2.0 interface;
when the first display panel is in the second bandwidth mode, the second Type-c interface is set as: and transmitting the display data by using a 2-channel USB extreme speed interface and transmitting downlink data by using a USB3.0 interface.
For example, in a display system provided in some embodiments of the present application, the main control board includes a first control chip, a second control chip, a multiplexer, and a DP port repeater, wherein
The first control chip is configured to perform data processing on the display data to display the display data, and is further configured to control the second control chip according to the bandwidth setting, and control the multiplexer through the second control chip to configure an interface mode of the second Type-c interface, where the interface mode includes a first interface mode and a second interface mode, the first interface mode is that the second Type-c interface is configured as a 4-channel USB high-speed interface to transmit the display data, and the second interface mode is that the second Type-c interface is configured as a 2-channel USB high-speed interface and a 1-channel USB3.0 interface to transmit the display data;
the DP port repeater is configured to divide the display data into a first path of display data and a second path of display data, where the first path of display data is transmitted to the first control chip, and the second path of display data is transmitted to the first DP interface.
For example, in a display system provided in some embodiments of the present application, the first control chip sets an interface mode of the second Type-c interface and an output mode of the DP port repeater in synchronization, where the interface mode of the second Type-c interface and the output mode of the DP port repeater are set by the first control chip
The first control chip passes through I2Modifying the configuration bits of the second control chip by the C bus so as to control the multiplexer to configure the interface mode of the second Type-C interface;
the first control chip outputs a control level to a configuration pin of the DP port repeater through a control signal line to control an output mode of an output channel of the DP port repeater, wherein the output mode comprises a first output mode corresponding to the first interface mode and a second output mode corresponding to the second interface mode.
For example, in some embodiments of the present application, the second control chip is connected to the display device through an I-line2The C bus configures the multiplexer.
For example, in some embodiments of the present application, the first display panel provides 100W of charging power to the display controller through the Type-c connection line.
A second embodiment of the present invention provides a display method using the display system according to the first embodiment, including:
the first display panel receives display data output by a first Type-c interface of the display through a Type-c connecting line connected with a second Type-c interface of the first display panel;
the first display panel forms a daisy chain which takes a second Type-c interface as a signal source and is connected with the second display panel through a main control panel and a DP signal line, so that the first display panel and the second display panel display the display data.
For example, in a display method provided in some embodiments of the present application, the forming, by the first display panel through the main control board and the DP signal line, a daisy chain connecting the second display panels with the second Type-c interface as a signal source further includes:
the main control board of the first display panel selects a first bandwidth mode or a second bandwidth mode according to the received bandwidth setting, wherein
When the first display panel is in the first bandwidth mode, setting the second Type-c interface as: transmitting the display data by using a 4-channel USB (universal serial bus) extreme speed interface and transmitting downlink data by using a USB2.0 interface;
when the first display panel is in the second bandwidth mode, setting the second Type-c interface as: and transmitting the display data by using a 2-channel USB extreme speed interface and transmitting downlink data by using a USB3.0 interface.
For example, in a display system provided by some embodiments of the present application, the main control board includes a first control chip, a second control chip, a multiplexer, and a DP port repeater, and the first display panel forms a daisy chain connecting the second display panel with the second Type-c interface as a signal source through the main control board and the DP signal line further includes:
the first control chip synchronously sets an interface mode of the second Type-c interface and an output mode of the DP port repeater, and the interface mode of the second Type-c interface and the output mode of the DP port repeater are correspondingly set;
the DP port repeater divides the display data into a first path of display data transmitted to the first control chip and a second path of display data transmitted to a first DP interface according to the output mode;
the first control chip performs data processing according to the first path of display data to display the display data;
and the first DP interface transmits the second path of display data to the second display panel so that the second display panel displays the display data.
A third embodiment of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method according to the second embodiment.
A fourth embodiment of the invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method according to the second embodiment when executing the program.
The invention has the following beneficial effects:
aiming at the existing problems, the invention provides a display system, a display method, computer equipment and a storage medium, wherein the display system, the display method, the computer equipment and the storage medium are formed, and the daisy chain which takes a Type-c interface of a first display panel as a signal source and is connected with a second display panel is formed, so that the first display panel and the second display panel display data sent by a display controller; therefore, the daisy chain function with the Type-c interface as the signal source is realized under the condition that the scaler IC does not support the daisy chain function, so that the problems in the prior art are solved, the application scene and the application range of the daisy chain of the display are effectively widened, the high-speed transmission of video data in the display system is realized, and the practical application value is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of a display system according to an embodiment of the present invention;
FIG. 2 is a schematic view of a scene of the display system according to an embodiment of the invention;
FIG. 3 is a block diagram of the main control board according to an embodiment of the present invention;
FIG. 4 shows a flow chart of a display method according to an embodiment of the invention;
FIG. 5 is a schematic structural diagram of the main control board according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer device according to another embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
To solve the problems in the prior art, as shown in fig. 1, an embodiment of the present invention provides a display system, including: a display controller, a first display panel, a second display panel, a Type-c connecting line connecting the display controller and the first display panel, and a DP signal line connecting the first display panel and the second display panel, wherein
The display controller comprises a first Type-c interface and is connected with one end of the Type-c connecting line;
the first display panel comprises a main control panel, a second Type-c interface connected with the other end of the Type-c connecting line, and a first DP interface connected with one end of the DP signal line;
the second display panel comprises a second DP interface connected with the other end of the DP signal line;
the first display panel receives display data sent by a first Type-c interface of the display controller according to the second Type-c interface, a daisy chain taking the second Type-c interface as a signal source is formed through the main control board and the DP signal line, and the first display panel and the second display panel display the display data.
In a specific embodiment, as shown in fig. 2, the main control chip scaler IC of the first display panel does not support a daisy chain function, the display controller and the first display panel are connected to a first Type-c interface 11 of the display controller and a second Type-c interface 12 of the first display panel through a Type-c connection line 10, and the first display panel and the second display panel are connected to a first DP interface 21 of the first display panel and a second DP interface 22 of the second display panel through a DP signal line 20, so as to form a daisy chain connecting the second display panel with the Type-c interface of the first display panel as a signal source.
In this embodiment, the first display panel and the second display panel can receive and display the display data sent by the display controller through the daisy chain with the Type-c interface as the signal source, so as to solve the problems in the prior art, effectively widen the application scene and the application range of the daisy chain of the display, realize high-speed transmission of video data in the display system, and have practical application value.
In an optional embodiment, the main control board of the first display panel selects a first bandwidth mode or a second bandwidth mode according to the received bandwidth setting, where when the first display panel is in the first bandwidth mode, the second Type-c interface is set to: transmitting the display data by using a 4-channel USB (universal serial bus) extreme speed interface and transmitting downlink data by using a USB2.0 interface; when the first display panel is in the second bandwidth mode, the second Type-c interface is set as: and transmitting the display data by using a 2-channel USB extreme speed interface and transmitting downlink data by using a USB3.0 interface.
In this embodiment, the main control board of the first display panel determines a specific channel used when data is transmitted using the daisy chain function according to default settings of the display panel, such as factory settings or settings changed by a user in subsequent use.
Taking the display panel with a resolution of 3840 × 2160, a color depth of 10 bits (8 bits + a-FRC), a refresh rate of 60Hz, and 3 sub-pixels as an example, the bandwidth (data amount per second) required for transmitting 4K @60Hz is 3840 × 2160 × 60 × 3 × 10 ≈ 14.93 Gbps. The actual bandwidth required to reserve about 10% of the redundancy is 17Gbps, considering other factors that may exist in practical applications.
Meanwhile, the theoretical maximum transmission rate of the Type-C USB3.1 Gen2 is 10Gbps Super Speed, namely the maximum transmission rate of the USB ultra-Speed interface is 10 Gbps. If Type C supports full function (PD power conversion), when using DP-Alt mode function, 2/4lanes DP1.4 transmission can be supported, the speed per lane can reach 8.1Gbps at the most, at this time, the original bandwidth of 4lanes is 8.1Gbps 4-32.4 Gbps, but the effective bandwidth is only 25.92Gbps, and the effective bandwidth of 2lanes is only 12.96 Gbps.
Therefore, when transmitting 4K @60Hz video data, the second Type-c interface of the first display panel needs to be set as: the display data is transmitted by using four pairs of high-speed channels in a Type C interface, for example, the display data comprises TX1+ and TX1-, RX1+ and RX1-, TX2+ and TX2-, and RX2+ and RX2-, namely the display data is transmitted by using a 4-channel USB (universal serial bus) extreme speed interface, and for downlink data, the display data needs to be transmitted by using a USB2.0 channel in a Type interface, namely the downlink data is transmitted by using a USB2.0 interface. And for transmitting video data smaller than 4K @60Hz, for example, transmitting 2K @60Hz or 4K @30Hz, the second Type-c interface of the first display panel may be set as: and transmitting the display data by using two pairs of high-speed channels in the TypeC interface, namely transmitting the display data by using a 2-channel USB extreme-speed interface, transmitting downlink data by using the other two pairs of USB3.0 channels in the TypeC interface, namely transmitting the downlink data by using the USB3.0 interface. Thereby selecting a suitable bandwidth mode according to different data transmission requirements.
In a specific embodiment, the main control board comprises a first control chip, a second control chip, a multiplexer, and a DP port repeater, wherein
The first control chip is configured to perform data processing on the display data to display the display data, and is further configured to control the second control chip according to the bandwidth setting, and control the multiplexer through the second control chip to configure an interface mode of the second Type-c interface, where the interface mode includes a first interface mode and a second interface mode, the first interface mode is that the second Type-c interface is configured as a 4-channel USB high-speed interface to transmit the display data, and the second interface mode is that the second Type-c interface is configured as a 2-channel USB high-speed interface and a 1-channel USB3.0 interface to transmit the display data;
the DP port repeater is configured to divide the display data into a first path of display data and a second path of display data, where the first path of display data is transmitted to the first control chip, and the second path of display data is transmitted to the first DP interface.
In this embodiment, as shown in fig. 3:
when video data of 4K @60Hz is transmitted, and the bandwidth is set to be a first bandwidth mode, namely a broadband mode, the first control chip controls the second control chip to set the multiplexer, a second Type-c interface is configured to be a 4-channel USB (universal serial bus) top-speed interface, the display data are received and transmitted to the DP port repeater, the DP port repeater divides the display data into two paths, one path of the display data is transmitted to the first control chip and is subjected to data processing so as to be displayed on the first display panel, and the display data are transmitted to the second display panel through the DP signal line from the first DP interface so as to be displayed on the second display panel, so that the transmission of high-definition video data is realized. It should be noted that, at this time, the second Type-c interface uses the USB2.0 interface to transmit downlink data.
Similarly, when the 2K @60Hz video data is transmitted and the bandwidth is set to be in a second bandwidth mode, namely in a narrow bandwidth mode, the first control chip controls the second control chip to set the multiplexer, configures the second Type-c interface to be a 2-channel USB top-speed interface and a 1-channel USB3.0 interface, receives the display data and transmits the display data to the DP port repeater, the DP port repeater divides the display data into two paths, one path of the display data is transmitted to the first control chip and is subjected to data processing so as to be presented on the first display panel, and the other path of the display data is transmitted to the first DP interface and is transmitted to the second display panel through the DP signal line so as to be presented on the second display panel, so that the transmission of the video data is realized; at the moment, the second Type-c interface uses the multiplexed 1-channel USB3.0 interface to transmit downlink data.
In this embodiment, the display data is changed into two paths of display data through the DP port repeater, and the display data is transmitted to the second display panel by matching with the first control chip, the second control chip and the multiplexer to realize the daisy chain function, so that the display data is respectively displayed on the first display panel and the second display panel; namely, the transmission of the display data is realized through the formed daisy chain which takes the Type-c interface of the first display panel as a signal source and is connected with the second display panel.
In view of the above stable display of the daisy chain formed by taking Type c as the signal source, in an alternative embodiment, the first control chip sets the interface mode of the second Type-c interface and the output mode of the DP port repeater synchronously, wherein
The first control chip passes through I2Modifying the configuration bits of the second control chip by the C bus so as to control the multiplexer to configure the interface mode of the second Type-C interface;
the first control chip outputs a control level to a configuration pin of the DP port repeater through a control signal line to control an output mode of an output channel of the DP port repeater, wherein the output mode comprises a first output mode corresponding to the first interface mode and a second output mode corresponding to the second interface mode.
In this embodiment, the second Type-c interface and the output channel of the DP port repeater are synchronously set by the first control chip, thereby implementing stable display of the first display panel and the second display panel.
For example, when transmitting 4K @60Hz video data, the first control chip passes through I2C bus modifies configuration bits of the second control chip, and the second control chip passes through I2The C bus configures the multiplexer, when the second Type-C interface is set to the first interface mode, i.e. when the 4-channel USB extreme speed interface is used to transmit the display data, the first control chip outputs a control level to the configuration pin of the DP port repeater through a control signal line, and correspondingly sets the output channel of the DP port repeater to the output channel corresponding to the second Type-C interface, for example, the bandwidth of DP1.4HBR 34 lanes is used to transmit the 4K @60Hz display data.
For example, when transmitting 2K @60Hz video data, the first control chip passes through I2C bus modifies configuration bits of the second control chip, and the second control chip passes through I2The C bus configures the multiplexer, when the second Type-C interface is set to the second interface mode, that is, when the 2-channel USB extreme-speed interface is used to transmit the display data and the 1-channel USB3.0 interface is used to transmit the downlink data, the first control chip outputs a control level to the configuration pin of the DP port repeater through a control signal line, and correspondingly sets the output channel of the DP port repeater to the output channel corresponding to the second Type-C interface, for example, the dp1.4hbrj32lanes bandwidth is used to transmit the 2K @60Hz display data.
In an alternative embodiment, the first display panel provides 100W charging power to the display controller through the Type-c connection line.
In the present embodiment, the second Type-c interface of the first display panel provides a charging power of 100W to a connected display controller, for example, a desktop computer, a portable computer, or the like.
Corresponding to the display system provided in the foregoing embodiment, an embodiment of the present application further provides a display method using the foregoing display system, and since the display method provided in the embodiment of the present application corresponds to the display systems provided in the foregoing embodiments, the foregoing embodiment is also applicable to the display method provided in the present embodiment, and is not described in detail in the present embodiment.
As shown in fig. 4, an embodiment of the present application further provides a display method using the display system described above, including: the first display panel receives display data output by a first Type-c interface of the display through a Type-c connecting line connected with a second Type-c interface of the first display panel; the first display panel forms a daisy chain which takes a second Type-c interface as a signal source and is connected with the second display panel through a main control panel and a DP signal line, so that the first display panel and the second display panel display the display data.
In this embodiment, the first display panel and the second display panel are enabled to display the display data sent by the display controller by forming a daisy chain connecting the second display panel with the Type-c interface of the first display panel as a signal source; therefore, the daisy chain function with the Type-c interface as the signal source is realized under the condition that the scaler IC does not support the daisy chain function, so that the problems in the prior art are solved, the application scene and the application range of the daisy chain of the display are effectively widened, the high-speed transmission of video data in the display system is realized, and the practical application value is realized.
In an alternative embodiment, the daisy chain connecting the first display panel and the second display panel by using the second Type-c interface as a signal source through the main control board and the DP signal line further comprises:
the main control board of the first display panel selects a first bandwidth mode or a second bandwidth mode according to the received bandwidth setting, wherein when the first display panel is in the first bandwidth mode, the second Type-c interface is set as: transmitting the display data by using a 4-channel USB (universal serial bus) extreme speed interface and transmitting downlink data by using a USB2.0 interface; when the first display panel is in the second bandwidth mode, setting the second Type-c interface as: and transmitting the display data by using a 2-channel USB extreme speed interface and transmitting downlink data by using a USB3.0 interface.
Specifically, the main control board includes a first control chip, a second control chip, a multiplexer, and a DP port repeater, and the first display panel forms a daisy chain connecting the second display panel with a second Type-c interface as a signal source through the main control board and a DP signal line, further including: the first control chip synchronously sets an interface mode of the second Type-c interface and an output mode of the DP port repeater, and the interface mode of the second Type-c interface and the output mode of the DP port repeater are correspondingly set; the DP port repeater divides the display data into a first path of display data transmitted to the first control chip and a second path of display data transmitted to a first DP interface according to the output mode; the first control chip performs data processing according to the first path of display data to display the display data; and the first DP interface transmits the second path of display data to the second display panel so that the second display panel displays the display data.
In this embodiment, the display data is changed into two paths of display data through the DP port repeater, and meanwhile, the interface mode of the second Type-c interface and the output mode of the DP port repeater are synchronously set through the first control chip to implement the daisy chain function, and the display data is transmitted to the second display panel, so that the display data is respectively displayed on the first display panel and the second display panel. For specific implementation, reference is made to the foregoing embodiments, which are not described herein again.
The display method of the present application is described below as a practical example:
the display controller is a computer; the first display panel is a 27' Mini Led display, the first display panel comprises an HDMI interface and a DP interface, wherein the DP interface comprises a DP input interface, a DP output interface, a Type-C uplink port, a Type-B uplink port and four Type-A downlink ports, one Type-A interface has a BC1.2 quick charging function, and the resolution of the first display panel is 4K (3840 × 2160); the second display panel is not particularly limited, and may be the same type as the first display panel or different type from the first display panel, and may have a DP interface.
In the embodiment, one end of a Type C connecting cable is connected to a Type-C interface of a computer, and the other end of the Type C connecting cable is connected to a Type-C uplink port of a 27' Mini Led display; meanwhile, one end of a DP cable is connected to a DP output interface of the 27' Mini Led display, and the other end of the DP cable is connected to a DP input interface of the second display panel; and finishing the construction of the hardware structure of the daisy chain with the Type-C as the signal source.
In this embodiment, considering that the resolution of a 27 "Mini Led display is 3840 × 2160, the color depth is 10bit (8bit + a-FRC), the refresh rate is 60Hz, and 3 sub-pixels. Therefore, the bandwidth (data volume per second) required for transmitting 4K @60Hz is 3840x2160x60x3x10 ≈ 14.93Gbps, and the required bandwidth is more than 17Gbps after setting about 10% -20% of redundancy.
Meanwhile, the theoretical maximum transmission rate of Type-C USB3.1 Gen2 is 10Gbps Super Speed. If Type C supports full function (PD power conversion), when using DP-Alt mode function, 2/4lanes DP1.4 transmission can be supported, the speed per lane can reach 8.1Gbps at the most, at this time, the original bandwidth of 4lanes is 8.1Gbps 4-32.4 Gbps, but the effective bandwidth is only 25.92Gbps, and the effective bandwidth of 2lanes is only 12.96 Gbps.
As shown in fig. 5, the structure diagram is a structural schematic diagram of a main control board of a 27 "Mini Led display, where the first control chip is a scaler IC, the second control chip is a PD controller, the multiplexer is a MUX, the DP port repeater is a DP HUB, the first DP interface is a DP output interface, and the second Type-C interface is a Type C interface.
In this example, considering that the 2-channel bandwidth of DP1.4 is not enough to realize the transmission of video data when transmitting a 4K @60Hz picture, it is necessary to use the 4-channel of DP1.4 for transmission, i.e. four pairs of high-speed channels of TX1+/-, RX1+/-, TX2+/-, RX2 +/-in a TypeC interface are used for transmitting the display data.
Therefore, a DP HUB chip is added on a DP alt mode channel of the Type C to realize the daisy chain function of a Type C signal source, and meanwhile, a first control chip scaler IC is used for synchronously controlling the DP HUB chip and the MUX chip, so that the DP HUB and the DP alt mode are synchronously switched to 2/4lanes, and the daisy chain function of 4K @60Hz can be realized.
Wherein, multiplexer MUX is USB3.1 Gen1/Gen2 crossbar switch, and this crossbar switch is 6: a 4 differential lane bidirectional matrix crossbar solution that can multiplex one USB3.1 Gen1/Gen 2lane, one USB3.1 Gen1/Gen 2lane, and two DP1.2/1.4 lanes or four DP1.2/DP1.4 lanes for one USB Type-C connector has excellent signal integrity for high speed signals and low power dissipation.
As shown in fig. 5, the signal line 1 is a transmission picture signal accessed by a Type C interface, and the signal line 4 is a USB data channel in which a Type C interface and a downlink Type a interface interact with each other; the picture signal accessed from the Type C interface is transmitted to a DP HUB through a MUX chip and is divided into two paths of picture signals through the DP HUB, one path of picture signal is transmitted to a first control chip through a signal line 3 to realize that a first display panel displays the picture signal, the other path of picture signal is transmitted to a DP output interface through a signal line 2 to be transmitted to a second display panel, namely, the transmission of the display picture signal is realized through the built daisy chain; meanwhile, the picture signal accessed from the Type C interface is transmitted to the USB HUB through the MUX chip and is transmitted to the USB- A interfaces 1, 2, 3 and 4 through the USB HUB.
Specifically, the first control chip Scaler IC passes through I2The C bus writes configuration bits to two registers 0x85 and 0x86 of the second controller chip PD controller, wherein the data written by 0x85 bit0 is used to inform the second controller chip PD controller to control the DP signal output by the multiplexer Mux chip to perform 2 channel/4 channel switching. When 0x85 bit0 is 1, the second control chip PD controller controls the DP output of the multiplexer Mux chip to be 4 channels; when 0x85 bit0 is 0, the second controller chip PD controller controls the DP output of the multiplexer Mux chip to be 2l channel.
In this example, the second control chip PD controller and the multiplexer MUX are arranged in a master-slave configuration, the second control chip PD controller passing through I2The C-bus controls the multiplexer MUX. Specifically, Pin14(a0) of the multiplexer MUX chip is pulled low to ground, Pin35(a1) is also pulled low to ground, and the address of the multiplexer MUX chip as a slave device is 1010100X, where X is 0/1(W/R), and the PD controller of the second control chip is according to the connection condition of CC 1/2:
when 4K @60Hz picture data is transmitted, 00000010/00000011 is written into a corresponding register 10101001 of a multiplexer MUX chip, and the multiplexer MUX outputs 4 channels DP1.2/1.4, namely, all of the assignment C mode of the DP alt mode and 4 channels are used for picture signal transmission;
when the 2K @60Hz or 4K @30Hz picture data is transmitted, 00000110/00000111 is written into a corresponding register 10101001 of the multiplexer MUX chip, the output of the multiplexer MUX chip is 'USB 3.1Gen 1/2+2 channels DP 1.2/1.4', namely, an assignment D mode of the DP alt mode, 2 channels are used for picture signal transmission, and the other 2 channels are used for USB data transmission.
On the other hand, the DP HUB chip is a DisplayPort 1.4Multi-Stream HUB Controller, the Type C input picture signal is divided into two paths by the DP HUB chip, one path is transmitted to the first control chip scaler IC, and the other path is transmitted to the DP output interface to realize the daisy chain function.
The DP HUB chip uses the bandwidth of DP1.4HBR 34 lanes when transmitting 4K @60Hz picture data.
DP HUB chip uses DP1.4HBR3 when transmitting 2K @60Hz or 4K @30Hz picture data
2lanes of bandwidth.
Specifically, the first control chip scaler IC controls a GPIO5 pin of the DP HUB chip, so that the DP HUB chip performs 2-channel/4-channel switching. Firstly, controlling the level of DP HUB GPIO5 pin, wherein the output channel of DP HUB corresponding to low level is 4-channel output, and the output channel of VMM5322 corresponding to high level is 2-channel output; then, DP HUB chip is gone up electrically, and when the circuit design, DP HUB's chip power has used a MOS switch to do control, and this switch of first control chip scaler IC control is in order to realize going up electrically DP HUB chip.
According to the steps, the DP HUB chip and the output channel of the multiplexer MUX (namely the interface mode of the second Type-c interface) are synchronously controlled through the first control chip scaler IC, so that transmission of different picture data is realized.
It is worth to be noted that, when 4K @60Hz picture data is transmitted, the second Type-c interface is set as a 4-channel USB fast interface, that is, the 4-channel USB fast interface is used for transmitting the picture data, and the USB2.0 interface is used for transmitting downlink data; when 2K @60Hz or 4K @30Hz picture data is transmitted, the second Type-c interface is set as a 2-channel USB (universal serial bus) speed interface and a USB3.0 interface to transmit downlink data, namely, the 2-channel USB speed interface is used for transmitting the picture data, and the USB3.0 interface is used for transmitting the downlink data.
At this point, the first display panel and the second display panel display the display data sent by the display controller through the formed daisy chain which takes the Type-c interface of the first display panel as a signal source and is connected with the second display panel; therefore, the daisy chain function with the Type-c interface as the signal source is realized under the condition that the scaler IC does not support the daisy chain function, so that the problems in the prior art are solved, the application scene and the application range of the daisy chain of the display are effectively widened, the high-speed transmission of video data in the display system is realized, and the practical application value is realized.
Another embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements: the first display panel receives display data output by a first Type-c interface of the display through a Type-c connecting line connected with a second Type-c interface of the first display panel; the first display panel forms a daisy chain which takes a second Type-c interface as a signal source and is connected with the second display panel through a main control panel and a DP signal line, so that the first display panel and the second display panel display the display data.
In practice, the computer-readable storage medium may take any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present embodiment, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
As shown in fig. 6, another embodiment of the present invention provides a schematic structural diagram of a computer device. The computer device 12 shown in FIG. 6 is only an example and should not bring any limitations to the functionality or scope of use of embodiments of the present invention.
As shown in FIG. 6, computer device 12 is in the form of a general purpose computing device. The components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
Bus 18 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Computer device 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. Computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 6, and commonly referred to as a "hard drive"). Although not shown in FIG. 6, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
Computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with computer device 12, and/or with any devices (e.g., network card, modem, etc.) that enable computer device 12 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 22. Also, computer device 12 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via network adapter 20. As shown in FIG. 6, the network adapter 20 communicates with the other modules of the computer device 12 via the bus 18. It should be appreciated that although not shown in FIG. 6, other hardware and/or software modules may be used in conjunction with computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processor unit 16 executes various functional applications and data processing, such as implementing a display method provided by an embodiment of the present invention, by executing programs stored in the system memory 28.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims (10)

1. A display system, comprising: a display controller, a first display panel, a second display panel, a Type-c connecting line connecting the display controller and the first display panel, and a DP signal line connecting the first display panel and the second display panel, wherein
The display controller comprises a first Type-c interface and is connected with one end of the Type-c connecting line;
the first display panel comprises a main control panel, a second Type-c interface connected with the other end of the Type-c connecting line, and a first DP interface connected with one end of the DP signal line;
the second display panel comprises a second DP interface connected with the other end of the DP signal line;
the first display panel receives display data sent by a first Type-c interface of the display controller according to the second Type-c interface, a daisy chain taking the second Type-c interface as a signal source is formed through the main control board and the DP signal line, and the first display panel and the second display panel display the display data.
2. The display system of claim 1, wherein the main control board of the first display panel selects the first bandwidth mode or the second bandwidth mode according to the received bandwidth setting, wherein
When the first display panel is in the first bandwidth mode, the second Type-c interface is set as: transmitting the display data by using a 4-channel USB (universal serial bus) extreme speed interface and transmitting downlink data by using a USB2.0 interface;
when the first display panel is in the second bandwidth mode, the second Type-c interface is set as: and transmitting the display data by using a 2-channel USB extreme speed interface and transmitting downlink data by using a USB3.0 interface.
3. The display system of claim 2, wherein the main control board comprises a first control chip, a second control chip, a multiplexer, and a DP port repeater, wherein
The first control chip is configured to perform data processing on the display data to display the display data, and is further configured to control the second control chip according to the bandwidth setting, and control the multiplexer through the second control chip to configure an interface mode of the second Type-c interface, where the interface mode includes a first interface mode and a second interface mode, the first interface mode is that the second Type-c interface is configured as a 4-channel USB high-speed interface to transmit the display data, and the second interface mode is that the second Type-c interface is configured as a 2-channel USB high-speed interface and a 1-channel USB3.0 interface to transmit the display data;
the DP port repeater is configured to divide the display data into a first path of display data and a second path of display data, where the first path of display data is transmitted to the first control chip, and the second path of display data is transmitted to the first DP interface.
4. The display system according to claim 3, wherein the first control chip synchronously sets an interface mode of the second Type-c interface and an output mode of the DP port repeater, wherein
The first control chip passes through I2Modifying the configuration bits of the second control chip by the C bus so as to control the multiplexer to configure the interface mode of the second Type-C interface;
the first control chip outputs a control level to a configuration pin of the DP port repeater through a control signal line to control an output mode of an output channel of the DP port repeater, wherein the output mode comprises a first output mode corresponding to the first interface mode and a second output mode corresponding to the second interface mode.
5. The display system according to any one of claims 1 to 4,
the second control chip passes through I2The C bus configures the multiplexer;
and/or
The first display panel provides 100W charging power to the display controller through the Type-c connecting line.
6. A display method using the display system according to any one of claims 1 to 5, comprising:
the first display panel receives display data output by a first Type-c interface of the display through a Type-c connecting line connected with a second Type-c interface of the first display panel;
the first display panel forms a daisy chain which takes a second Type-c interface as a signal source and is connected with the second display panel through a main control panel and a DP signal line, so that the first display panel and the second display panel display the display data.
7. The method of claim 6, wherein the first display panel forms a daisy chain connecting the second display panel with the second Type-c interface as a signal source through the main control board and the DP signal line, further comprising:
the main control board of the first display panel selects a first bandwidth mode or a second bandwidth mode according to the received bandwidth setting, wherein
When the first display panel is in the first bandwidth mode, setting the second Type-c interface as: transmitting the display data by using a 4-channel USB (universal serial bus) extreme speed interface and transmitting downlink data by using a USB2.0 interface;
when the first display panel is in the second bandwidth mode, setting the second Type-c interface as: and transmitting the display data by using a 2-channel USB extreme speed interface and transmitting downlink data by using a USB3.0 interface.
8. The method of claim 7, wherein the main control board comprises a first control chip, a second control chip, a multiplexer, and a DP port repeater, and the first display panel forms a daisy chain connecting the second display panel with a second Type-c interface as a signal source through the main control board and the DP signal line further comprises:
the first control chip synchronously sets an interface mode of the second Type-c interface and an output mode of the DP port repeater, and the interface mode of the second Type-c interface and the output mode of the DP port repeater are correspondingly set;
the DP port repeater divides the display data into a first path of display data transmitted to the first control chip and a second path of display data transmitted to a first DP interface according to the output mode;
the first control chip performs data processing according to the first path of display data to display the display data;
and the first DP interface transmits the second path of display data to the second display panel so that the second display panel displays the display data.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 6-8.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 6-8 when executing the program.
CN202111207729.2A 2021-10-18 2021-10-18 Display system, display method, computer device and storage medium Pending CN113946305A (en)

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