CN108024129A - Display device and its mainboard - Google Patents
Display device and its mainboard Download PDFInfo
- Publication number
- CN108024129A CN108024129A CN201711331295.0A CN201711331295A CN108024129A CN 108024129 A CN108024129 A CN 108024129A CN 201711331295 A CN201711331295 A CN 201711331295A CN 108024129 A CN108024129 A CN 108024129A
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- Prior art keywords
- switch
- hdmi
- display device
- mainboard
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004065 semiconductor Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000005392 Spasm Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of mainboard of display device, the HDMI interface being connected including chip main board and with the HDMI ports on the chip main board, the HDMI interface includes IIC signal terminals, the IIC signal terminals include clock pins and data pin, UART ports are additionally provided with the chip main board, the UART ports include transmitting pin and receive pin, the transmitting pin and the reception pin are connected to the clock pins and the data pin by switch module, by the break-make for controlling the switch module, the HDMI interface is multiplexed with to the external interface of the UART ports.The invention also discloses the display device for including mainboard as described above.
Description
Technical field
The present invention relates to display technology field, and in particular to a kind of display device and its mainboard.
Background technology
In display technology industry, such as television set, mainboard therein is usually provided with UART (Universal
Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter) port, UART ports mainly include hair
Penetrate (Tx) pin and receive (Rx) pin, UART ports are used for as system debug debug or are used with computer communication.With
Toward the mode that UART ports are drawn out to outside port from mainboard, mainly increase a serial port on the pcb board of periphery,
And individually increase a serial ports socket behind in television set, so not only occupy the space of the pcb board of periphery, add electricity
Depending on machine complete machine cost, at the same remain again a user usually without using port socket.Therefore, the prior art is to be improved
And development.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides it is a kind of can be convenient for software debugging, have it is logical
With the display device and its mainboard of the strong external debugging interface of property.
To achieve the above object, present invention employs following technical solution：
A kind of mainboard of display device, including chip main board and the HDMI that is connected with the HDMI ports on the chip main board
Interface, the HDMI interface include IIC signal terminals, and the IIC signal terminals include clock pins and data pin, wherein,
UART ports are additionally provided with the chip main board, the UART ports include transmitting pin and receive pin, and the transmitting is drawn
Foot and the reception pin are connected to the clock pins and the data pin by switch module, by controlling the switch
The HDMI interface, is multiplexed with the external interface of the UART ports by the break-make of module.
Specifically, the switch module is connected with switch control module, and the switch control module is controlled by HDMI triggerings
Signal；When the HDMI interface is connected with HDMI equipment, the HDMI trigger signals are high level, the switch control module
Send the first switch signal for controlling the switch module to disconnect；It is described when the HDMI interface is not connected with HDMI equipment
HDMI trigger signals are low level, and the switch control module sends the second switch signal for controlling the switch module connection.
Specifically, the switch module includes first switching element and second switch element；The first switching element
First end is connected to the transmitting pin, and second end is connected to the data pin, and control terminal is connected to the switch control mould
Block；The first end of the second switch element is connected to the reception pin, and second end is connected to the clock pins, control terminal
It is connected to the switch control module.
Specifically, the first switching element is metal-oxide-semiconductor or triode, and the second switch element is metal-oxide-semiconductor or three poles
Pipe.
Specifically, the switch control module includes first resistor, second resistance, 3rd resistor, the 4th resistance and the 3rd
Switch element；The first end connection standby signal of the first resistor, second end are connected to the control of the first switching element
End；The first end of the second resistance is connected to the second end of the first resistor, and second end is connected to the second switch member
The control terminal of part；The first end of the 3rd resistor connects the HDMI trigger signals, and second end is connected to the 3rd switch
The control terminal of element, the first end of the 3rd switch element are connected to the second end of the first resistor, second end and ground electricity
Property connection；The first end of 4th resistance is connected to the second end of the 3rd resistor, and second end is electrically connected with ground.
Specifically, the 3rd switch element is metal-oxide-semiconductor or triode.
Specifically, the standby signal is+5V voltages, and the high level of the HDMI trigger signals is+5V voltages.
Another aspect of the present invention is to provide a kind of display device, and the display device includes display panel and driving fills
Put, the driving device to the display panel provide drive signal so that the display panel show image, wherein, the drive
Dynamic device includes the mainboard of display device as described above.
The mainboard of display device provided in an embodiment of the present invention, switch module is set by the UART ends in mainboard by increasing
Mouth is connected to exterior general HDMI interface, so that HDMI interface can be multiplexed with the external interface of UART ports, realizes
It is a kind of can be convenient for software debugging, there is versatile external debugging interface, reduce the manufacturing cost of product.
Brief description of the drawings
Fig. 1 is the structure diagram of the mainboard of display device provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram of the mainboard of display device provided in an embodiment of the present invention；
Fig. 3 is the structure diagram of display device provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings to the specific reality of the present invention
The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in attached drawing and according to
What the embodiments of the present invention of attached drawing description were merely exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only
Show the structure and/or processing step closely related with scheme according to the present invention, and eliminate little with relation of the present invention
Other details.
The present embodiment provide firstly a kind of mainboard of display device, and refering to Fig. 1 and Fig. 2, the mainboard includes movement master
Plate 1 and it is connected with HDMI (High Definition Multimedia Interface) port 12 on the chip main board 1
HDMI interface 2, the HDMI interface 2 includes IIC (Inter-Integrated Circuit, IC bus) signal end
Son, is specifically, and the IIC signal terminals include clock pins SCL and data pin SDA, and the HDMI ports 12 include and institute
State the corresponding signal terminal I1 and I2 of clock pins SCL and data pin SDA, the clock pins SCL and the signal terminal
I1 connections, the data pin SDA are connected with the signal terminal I2.
Further, UART ports 11 are additionally provided with the chip main board 1, the UART ports 11 include transmitting pin
Tx and reception pin Rx.Wherein, the transmitting pin Tx and the reception pin Rx are connected to the clock by switch module 3
The pin SCL and data pin SDA, by controlling the break-make of the switch module 3, institute is multiplexed with by the HDMI interface 2
State the external interface of UART ports 11.
Specifically, the switch module 3 is connected with switch control module 4, and the switch control module 4 is controlled by HDMI and touches
Signalling Vh.When the HDMI interface 2 is connected with HDMI equipment, the HDMI trigger signals Vh is high level, the switch
Control module 4 sends the first switch signal for controlling the switch module 3 to disconnect, and at this time, the transmitting pin Tx and described connects
The spasm foot Rx and clock pins SCL's and data pin SDA separated, the clock pins SCL and data
Pin SDA is used for the function of performing the HDMI signal transmissions of script.It is described when the HDMI interface 2 is not connected with HDMI equipment
HDMI trigger signals Vh is low level, and the switch control module 4 sends the second switch letter for controlling the switch module 3 to connect
Number, at this time, between the transmitting pin Tx and reception pin Rx and the clock pins SCL and the data pin SDA
Connection, the clock pins SCL and the data pin SDA are used for the function of performing the signal transmission of UART ports.
It should be noted that UART belongs to one kind of asynchronous serial port communications protocol, operation principle is will to transmit the every of data
One character, one transmission for connecing one, it is only necessary to which two signals of Tx, Rx can be completed to communicate, and be Transistor-Transistor Logic level, the UART
Port async is used for debugging and firmware updating, and UART ports are typically provided with existing display device.HDMI interface is high
Definition multimedia interface, is a kind of digitized video/audio interface technology, is that the tailored version digitlization for being adapted to image transmission connects
Mouthful, it can transmit audio and signal of video signal at the same time, and the HDMI interface of standard includes 19pin, which includes IIC signal terminals,
Specifically clock pins SCL and data pin SDA, it can be multiplexed with the company of two signals of Tx, Rx in UART ports just
Connect pin.It should be noted that in Fig. 1 and Fig. 2, the IIC signal terminals that are exemplarily only shown in which in HDMI interface 2,
Correspondingly, the HDMI ports 12 on the chip main board 1 have also been merely illustrative signal corresponding with IIC signal terminals
Terminal I1 and I2.
Specifically, as shown in Fig. 2, the switch module 3 includes first switching element T1 and second switch element T2.It is described
The first end of first switching element T1 is connected to the transmitting pin Tx of the UART ports 11, and second end is connected to the HDMI and connects
The data pin SDA of mouth 2, control terminal are connected to the switch control module 4, control first to open by the switch control module 4
Close the connection and disconnection between the first end and second end of element T1.The first end of the second switch element T2 is connected to described
The reception pin Rx of UART ports 11, second end are connected to the clock pins SCL of the HDMI interface 2, and control terminal is connected to institute
Switch control module 4 is stated, the company between the first end and second end of second switch element T2 is controlled by the switch control module 4
On and off is opened.
More specifically, in the present embodiment, the first switching element T1 is triode, the second switch element T2
Selected as triode.The emitter of triode T1 is connected to transmitting pin Tx, and collector is connected to data pin SDA, and base stage connects
It is connected to switch control module 4.The emitter of triode T2, which is connected to, receives pin Rx, and collector is connected to clock pins SCL, base
Pole is connected to switch control module 4.In some other embodiments, the first switching element T1 and second switch member
Part T2 can also selected as metal-oxide-semiconductor.
Further, as shown in Fig. 2, the switch control module 4 includes first resistor R1, second resistance R2, the 3rd electricity
Hinder R3, the 4th resistance R4 and the 3rd switch element T3.The first end connection standby signal Vs of the first resistor R1, second end connect
It is connected to the control terminal of the first switching element T1.The first end of the second resistance R2 is connected to the of the first resistor R1
Two ends, second end are connected to the control terminal of the second switch element T2.Described in the first end connection of the 3rd resistor R3
HDMI trigger signal Vh, second end are connected to the control terminal of the 3rd switch element T3, and the of the 3rd switch element T3
One end is connected to the second end of the first resistor R1, and second end is electrically connected with ground.The first end of the 4th resistance R4 connects
The second end of the 3rd resistor R3 is connected to, second end is electrically connected with ground.
More specifically, in the present embodiment, the 3rd switch element T3 is triode.The emitter of triode T3 and ground
It is electrically connected, collector is connected to the second end of the first resistor R1, and base stage is connected to the second end of the 3rd resistor R3.
Being turned on or off for triode T3 is controlled by HDMI trigger signals Vh.
Specifically, in the present embodiment, the standby signal (STANDBY) is+5V voltages, the HDMI trigger signals Vh's
High level is+5V voltages.
The mainboard of display device as described above：
First, refering to Fig. 2, when standby signal Vs after the power is turned on, it is described when the HDMI interface 2 is connected with HDMI equipment
HDMI trigger signals Vh is high level, and triode T3 conductings, the current potential of the second end of first resistor R1 is pulled low at this time, triode
T1 and triode T2 are turned off.At this time, the transmitting pin Tx and reception pin Rx and clock pins SCL and described
Data pin SDA's is separated, and the clock pins SCL and the data pin SDA are passed for performing the HDMI signals of script
Defeated function, establishes signal connection between the HDMI interface 2 and the HDMI ports 12.
2nd, refering to Fig. 2, when standby signal Vs after the power is turned on, when the HDMI interface 2 connects UART equipment, the HDMI
Trigger signal Vh is low level, triode T3 cut-offs, and the current potential of the second end of first resistor R1 is high level at this time, triode T1
It is both turned on triode T2.At this time, the transmitting pin Tx and reception pin Rx and the clock pins SCL and the number
Connected according between pin SDA, the signal transmission of the clock pins SCL and the data pin SDA for performing UART ports
Function, established between the HDMI interface 2 and the UART ports 11 signal connection.Thus, mainboard as described above is real
Having showed can be multiplexed with HDMI interface the external interface of UART ports, and not influence the function of HDMI interface script.
Further, the embodiment of the present invention additionally provides a kind of display device, as shown in figure 3, the display device includes
Display panel 200 and driving device 100, the driving device 100 provide drive signal so that described to the display panel 200
Display panel 200 shows image.
Wherein, the driving device 100 includes the mainboard 101 of display device as described above.Wherein, the display is set
Standby can be for example liquid crystal display device.
In conclusion the mainboard of display device provided in an embodiment of the present invention, switch module is set by mainboard by increasing
In UART ports be connected to exterior general HDMI interface so that HDMI interface can be multiplexed with the outside of UART ports
Interface, realize it is a kind of can be convenient for software debugging, there is versatile external debugging interface, reduce the life of product
Into cost.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed, or further include as this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there are other identical element in process, method, article or equipment including the key element.
The above is only the embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (8)
1. a kind of mainboard of display device, including chip main board and connect with the HDMI that the HDMI ports on the chip main board are connected
Mouthful, the HDMI interface includes IIC signal terminals, and the IIC signal terminals include clock pins and data pin, its feature exists
In being additionally provided with UART ports in the chip main board, the UART ports include transmitting pin and receive pin, the transmitting
Pin and the reception pin are connected to the clock pins and the data pin by switch module, by being opened described in control
The break-make of module is closed, the HDMI interface is multiplexed with to the external interface of the UART ports.
2. the mainboard of display device according to claim 1, it is characterised in that the switch module is connected with switch control
Module, the switch control module are controlled by HDMI trigger signals；It is described when the HDMI interface is connected with HDMI equipment
HDMI trigger signals are high level, and the switch control module sends the first switch signal for controlling the switch module to disconnect；
When the HDMI interface is not connected with HDMI equipment, the HDMI trigger signals are low level, and the switch control module is sent
Control the second switch signal of the switch module connection.
3. the mainboard of display device according to claim 2, it is characterised in that the switch module includes first switch member
Part and second switch element；The first end of the first switching element is connected to the transmitting pin, and second end is connected to described
Data pin, control terminal are connected to the switch control module；The first end of the second switch element is connected to the reception
Pin, second end are connected to the clock pins, and control terminal is connected to the switch control module.
4. the mainboard of display device according to claim 3, it is characterised in that the first switching element for metal-oxide-semiconductor or
Triode, the second switch element are metal-oxide-semiconductor or triode.
5. the mainboard of display device according to claim 3, it is characterised in that the switch control module includes the first electricity
Resistance, second resistance, 3rd resistor, the 4th resistance and the 3rd switch element；The first end connection standby signal of the first resistor,
Second end is connected to the control terminal of the first switching element；The first end of the second resistance is connected to the first resistor
Second end, second end are connected to the control terminal of the second switch element；The first end of the 3rd resistor connects the HDMI
Trigger signal, second end are connected to the control terminal of the 3rd switch element, and the first end of the 3rd switch element is connected to
The second end of the first resistor, second end are electrically connected with ground；The first end of 4th resistance is connected to the 3rd electricity
The second end of resistance, second end are electrically connected with ground.
6. the mainboard of display device according to claim 5, it is characterised in that the 3rd switch element for metal-oxide-semiconductor or
Triode.
7. the mainboard of display device according to claim 5, it is characterised in that the standby signal is+5V voltages, described
The high level of HDMI trigger signals is+5V voltages.
8. a kind of display device, including display panel and driving device, the driving device provides driving to the display panel
Signal is so that the display panel shows image, it is characterised in that the driving device is included such as any institutes of claim 1-7
The mainboard for the display device stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331295.0A CN108024129A (en) | 2017-12-13 | 2017-12-13 | Display device and its mainboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331295.0A CN108024129A (en) | 2017-12-13 | 2017-12-13 | Display device and its mainboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108024129A true CN108024129A (en) | 2018-05-11 |
Family
ID=62073374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711331295.0A Pending CN108024129A (en) | 2017-12-13 | 2017-12-13 | Display device and its mainboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108024129A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110062185A (en) * | 2019-04-19 | 2019-07-26 | 北京灵优智学科技有限公司 | A kind of interface circuit |
| WO2021223460A1 (en) * | 2020-05-08 | 2021-11-11 | 深圳Tcl数字技术有限公司 | Machine core main board and display device |
| CN114339105A (en) * | 2021-12-15 | 2022-04-12 | 西安诺瓦星云科技股份有限公司 | Display control system, control method and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140092312A1 (en) * | 2012-10-02 | 2014-04-03 | Seiko Epson Corporation | Image display apparatus and method of controlling image display apparatus |
| CN104967806A (en) * | 2015-07-28 | 2015-10-07 | 深圳市泰霖科技有限公司 | Switching circuit based on HDMI interface |
| WO2015185173A1 (en) * | 2014-06-07 | 2015-12-10 | Audi Ag | Motor-vehicle control unit having a current-saving mode for a parking phase |
| CN206115411U (en) * | 2016-08-04 | 2017-04-19 | 深圳泰科晶显科技有限公司 | Touch operation device of display screen |
-
2017
- 2017-12-13 CN CN201711331295.0A patent/CN108024129A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140092312A1 (en) * | 2012-10-02 | 2014-04-03 | Seiko Epson Corporation | Image display apparatus and method of controlling image display apparatus |
| WO2015185173A1 (en) * | 2014-06-07 | 2015-12-10 | Audi Ag | Motor-vehicle control unit having a current-saving mode for a parking phase |
| CN104967806A (en) * | 2015-07-28 | 2015-10-07 | 深圳市泰霖科技有限公司 | Switching circuit based on HDMI interface |
| CN206115411U (en) * | 2016-08-04 | 2017-04-19 | 深圳泰科晶显科技有限公司 | Touch operation device of display screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110062185A (en) * | 2019-04-19 | 2019-07-26 | 北京灵优智学科技有限公司 | A kind of interface circuit |
| WO2021223460A1 (en) * | 2020-05-08 | 2021-11-11 | 深圳Tcl数字技术有限公司 | Machine core main board and display device |
| CN114339105A (en) * | 2021-12-15 | 2022-04-12 | 西安诺瓦星云科技股份有限公司 | Display control system, control method and control device |
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Application publication date: 20180511 |