CN201134880Y - Interface between plates of digital television - Google Patents

Interface between plates of digital television Download PDF

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Publication number
CN201134880Y
CN201134880Y CNU2007200305842U CN200720030584U CN201134880Y CN 201134880 Y CN201134880 Y CN 201134880Y CN U2007200305842 U CNU2007200305842 U CN U2007200305842U CN 200720030584 U CN200720030584 U CN 200720030584U CN 201134880 Y CN201134880 Y CN 201134880Y
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CN
China
Prior art keywords
signal
pin
plug
inter
board interface
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.)
Expired - Fee Related
Application number
CNU2007200305842U
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Chinese (zh)
Inventor
张钰枫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Electric Co Ltd
Qingdao Hisense Electronics Co Ltd
Original Assignee
Qingdao Hisense Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao Hisense Electronics Co Ltd filed Critical Qingdao Hisense Electronics Co Ltd
Priority to CNU2007200305842U priority Critical patent/CN201134880Y/en
Application granted granted Critical
Publication of CN201134880Y publication Critical patent/CN201134880Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an interface between boards of digital television, which comprises a plug seat and a plug which is matched with the plug seat, wherein one is installed on a digital board, the other is installed on a main board, functional base pins used for transmitting audio frequency signals, video frequency signals, switch signals, bus signals and power supply are respectively contained in the plug seat and the plug, and are respectively and correspondingly connected the corresponding functional circuits of the digital board or the main board. The interface between boards of the utility model realizes the standardization and the generalization of interfaces through the comprehensive definition on circuits and structures, and enables different digital boards to be matched with the some main board, and is convenient to adopt the modularized design conception in novel developments in future, thereby, the developing cycle and the developing risk are greatly reduced, and the interface is suitable for spreading and using in digital audio frequency devices such as digital television or set-top boxes and the like.

Description

The inter-board interface of digital television
Technical field
The utility model belongs to the digital television technical field, specifically, relates to the improvement of the standard interface circuit of a kind of digiboard that connects digital television inside and mainboard.
Background technology
In digital audio/video equipment such as television set or set-top box, digiboard and mainboard that its inside is used to handle audio-video signal all link together by interface.But, adopting the digiboard of different digital conceptual design at present, interface on it and existing TV SKD can not be general.This is because characteristics of digital to television technology are: the power supply on the mainboard, Hang Chang, sound accompaniment, circuit comparative maturity such as tuning generally do not need to change; And the digitizing technique development is very fast, therefore, causes the digiboard circuit often need carry out certain improvement according to specific design.So just make that the digiboard interface and the existing mainboard of employing different digital conceptual design can not be general, whenever new technology appearance, the developer must redesign mainboard, and construction cycle lengthening, risk are strengthened, and its production technology also becomes complicated simultaneously.
The utility model content
The utility model is in order to solve the problem that the digiboard interface that adopts the different digital conceptual design and existing mainboard can not be general, a kind of generic disk interface that is applicable to digital television is provided, content and electrical characteristic by defining interface, standard mainboard and digiboard Hardware Engineer's design, make different digiboards can use identical mainboard, thereby significantly reduced construction cycle and risk.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of inter-board interface of digital television comprises socket and supporting with it plug, and one is installed on the digiboard, and another is installed on the mainboard; The function pin that includes transmitting audio signal, vision signal, switching signal, bus signals and power supply in described socket and plug respectively is respectively with the corresponding connection of last corresponding function circuit of described digiboard or mainboard.By described socket and the plug of pegging graft, realize signal and communication between digiboard and the mainboard.
Specifically, in described socket and plug, the function pin of transmission video signal comprises 3 road AV vision signal pins, 2 groups of TV signal pins, 1 road VIDEO signal pin, 1 group of YC bright signal pin, 1 group of YPbPr line by line scan color difference signal pin and 2 groups of high definition color difference signal pins.
Wherein, described TV signal is the signal by tuner demodulation output, comprise middle frequency difference sub-signal, intermediate-frequency gain control signal and rf gain control signal, in described socket and plug, be respectively arranged with two groups of function pins that transmit such signal, can connect two tuners, with communication need between the plate that satisfies some high-grade television set that is built-in with two tuners.
In addition, in described socket and plug, the function pin of transmitting audio signal comprises 1 road L channel audio frequency output pin, 1 road right audio channel output pin and 1 way word audio interface pin; Wherein, the left and right sound channels audio signal is separated output by the tuner demodulation, the digital audio and video signals that the transmission of digital audio interface pin is introduced by the outside.
Further, in described socket and plug, the function pin of transfer bus signal comprises two groups at least, is connected between the integrated chip on digiboard and the mainboard transmission I 2The C bus signals; Wherein between the master chip that a group is connected on tuner and the mainboard, search platform, change platform, regulate operation such as picture displaying ratio in order to the control tuner.In the utility model, the function pin of described transfer bus signal comprises 5 groups, wherein between 2 groups of master chips that are connected mainboard and two tuners; All the other 3 groups of integrated chips that are used to connect other are realized the centralized control of mainboard to all integrated chips.
Further again, in described socket and plug, the function pin of transmission power supply comprises that at least 4 tunnel, 1 tunnel transmission 12V DC power supply, 1 tunnel transmits big electric current 5V power supply, 1 tunnel transmission low current 5V power supply, another road transmit corresponding current potential according to the concrete needs of preheating amplification circuit on the digiboard DC power supply.In the utility model, the function pin design of transmission 12V DC power supply has 2 the tunnel.
Except that the above-mentioned functions pin, in described socket and plug, also include the function pin of transmission row field sync signal, push button signalling, remote signal, mute signal and power supply indicator control signal etc., to satisfy the communication need of various types of signal between digiboard and the mainboard.
Further again, in order to solve interference problem, in described inter-board interface, the function pin of each group transmission unlike signal all has at least one tunnel ground pin corresponding with it.
Further, in the utility model, the concrete employing of described inter-board interface is made up of the socket and the plug of 2 double 40 pins, and wherein, the contact pin of plug adopts gilding to make, to guarantee to contact the reliability of signal transmission between good and then raising plate.
Compared with prior art, advantage of the present utility model and good effect are: inter-board interface of the present utility model is by define on circuit and structure comprehensively, the standardization and the generalization of interface have been realized, make different digiboards can mate identical mainboard, be convenient to adopt modularized design in the new architecture exploitation afterwards, significantly reduced construction cycle and risk, be adapted at promoting the use of in the digital audio/video equipment such as digital television or set-top box.
Description of drawings
Fig. 1 is equipped with the digiboard of the inter-board interface that the utility model proposes and the structural representation of mainboard;
Fig. 2 is the pin definitions figure of two double sockets among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Inter-board interface of the present utility model by to the different digital scheme of present employing and in the future the development trend of digitization program carry out fully, consider all sidedly, select to adopt the socket and the plug of two double 40 pins to form described inter-board interface, be installed in respectively on the digiboard and mainboard of digital television or set-top box inside, define by the content and the opering characteristic of electric apparatus inter-board interface comprehensively, not only taken into account current all adopt the communication need of signal between the digiboard of different digital conceptual designs and mainboard, but also reserved signal transmission pin for the development of digiboard from now on.It is applied in the future the digital TV products design as standard interface, can the standard mainboard and digiboard Hardware Engineer's design, make different digiboards can use identical mainboard, be convenient to appropriate adoption modular design method in new architecture exploitation from now on, to reduce construction cycle and risk.
Embodiment one, and referring to shown in Figure 1, in the present embodiment, described inter-board interface 1 is made up of two double 40 needle socket XS101, XS201 and plug XS102, the XS202 supporting with it.Socket XS101, XS201 are installed on digiboard 2 or the mainboard 3, and plug XS102, XS202 then are installed on mainboard relative with it 3 or the digiboard 2.Present embodiment is with mounting receptacle XS101, XS201 on digiboard 2, and on mainboard 3 plug XS102, XS202 being installed is that example is specifically described.
Aspect structure and size, consider the reliability of signal transmission between plate, contact pin XS102, XS202 preferably adopt gilding to make, and be good to guarantee contact.Physical dimension to the digiboard height is stipulated, should satisfy two conditions at least: the digiboard that should avoid holding up when 1, installing collides with picture tube; 2, digiboard should and be reserved enough spaces away from the row field circuit, helps the digiboard heat radiation like this.
Aspect electrical specification of interface, adopted interface definition as table 1, table 2.
Table 1
Table 2
Can clearly be seen that by table 1 and table 2: in described inter-board interface 1, defined the function pin that multichannel is used for signals such as transmission video signal, audio signal, switching signal, bus signals and power supply.Wherein, consider that most vision signal and decoding chip all have the multi-channel video handoff functionality, the video switch chip no longer is set on mainboard, each road vision signal directly enters digiboard by corresponding input terminal, therefore, the video signal transmission pin of definition comprises in inter-board interface 1: 3 road AV vision signal pin V1_IN, V2_IN, V3_IN; 1 road VIDEO signal pin Video_OUT; 1 group of YC bright signal pin Y_IN, C_IN and 2 groups of TV signal pins; Simultaneously for the demonstration of compatible high-definition format, 1 group of YPbPr line by line scan color difference signal pin OUT_Y, OUT_PB, OUT_PR have also been defined; 2 groups of high definition color difference signal pin Y_HD1, Pb_HD1, Pr_HD1 and Y_HD2, Pb_HD2, Pr_HD2.
Wherein, described TV signal is the vision signal by tuner-type tuner demodulation output, comprise middle frequency difference sub-signal TUNER_IF_P, TUNER_IF_N, intermediate-frequency gain control signal IF_AGC and rf gain control signal RF_AGC, two groups of function pins that transmit such signal in described inter-board interface 1, have been defined respectively, can connect two tuners like this, with communication need between the plate that satisfies some high-grade television set that is built-in with two tuners.
The audio signal transmission pin of definition comprises in inter-board interface 1: 1 road L channel audio frequency output pin OUT_AUDIO_L is used for the left channel audio signals of tuner demodulation output is transferred to mainboard; 1 road right audio channel output pin OUT_AUDIO_R is used for the right channel audio signal of tuner demodulation output is transferred to mainboard; And 1 way word audio interface pin SPDIF_OUT, be used to transmit the digital audio and video signals introduced by the outside to mainboard.
Because the peripheral integrated chip major part of digital television has all realized I 2The total line traffic control of C, in order to realize that master chip is to the centralized control of other integrated chips on mainboard and the digiboard on the mainboard, 5 groups of bus signals pins in described inter-board interface 1, have been defined, specifically comprise 2 groups of SDA/SCL bus signals pins, 1 group of EEP_SDA/EEP_SCL bus signals pin and 2 groups of TUNER_SDA/TUNER_SCL bus signals pins.Wherein, 2 groups of TUNER_SDA/TUNER_SCL bus signals pins are connected between the master chip and two tuners of mainboard, search platform, change platform, regulate operation such as picture displaying ratio in order to the control tuner; All the other 3 groups of integrated chips that are used to connect other are used to realize comprising the control of aspects such as tuning, beautiful sound, volume, audio.
Present embodiment provides 2 road 12V power pin and 1 road POWER pin at the preheating amplification circuit on the digiboard, can be at the concrete power supply that needs to select to connect different potentials of different preheating amplification circuits; Provide 1 tunnel big electric current 5V power pin at AD conversion, decoding, up conversion, DA change-over circuit; Provide 1 road low current 5V power pin specially at master chip, when master chip standby and operate as normal, provide operating voltage for it.
In addition, also defined in the inter-board interface 1 of present embodiment: 2 road row field sync signal output pin OUT_HSYNC, OUT_VSYNC, row adopt the output of 5V positive pulse waveform synchronously, and field synchronization adopts the sawtooth waveforms output of two-way symmetry; 4 path switching signal pin GPIO_1, GPIO_2, GPIO_3, GPIO_4 are used to realize the control to aspects such as tuner sound accompaniment standard selector switch, supper bass switches; 1 road mute signal pin MUTE; No. 1 power supply indicator control signal pin LED; 2 road push button signalling input pin KEY1, KEY2 and 1 tunnel remote signal input pin IR.
In view of the high definition display requirement in future, the capable field circuit of mainboard is supported 3 line frequency points (28.15K, 31.5K, 33.75K), and these three line frequency points are realized by change power supply+B voltage.Therefore, inter-board interface 1 reserve specially 1 road PWM output pin control power supply+B voltage height.Also has a STBY pin that is specifically designed to the control standby in addition.
In order to solve interference problem, the function pin that each group in the inter-board interface 1 or each road are used to transmit unlike signal all at least definition have one tunnel ground pin GND corresponding with it, the shielding when being used to connect up.
Fig. 2 is the pin layout of two double socket XS101, XS201 in the described inter-board interface 1, and the concrete definition table of comparisons 1 of its each pin, table 2 can obtain.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (10)

1, a kind of inter-board interface of digital television comprises socket and supporting with it plug, and one is installed on the digiboard, and another is installed on the mainboard; It is characterized in that: in described socket and plug, include the function pin of transmitting audio signal, vision signal, switching signal, bus signals and power supply respectively, respectively with the corresponding connection of last corresponding function circuit of described digiboard or mainboard.
2, inter-board interface according to claim 1, it is characterized in that: in described socket and plug, the function pin of transmission video signal comprises 3 road AV vision signal pins, 2 groups of TV signal pins, 1 road VIDEO signal pin, 1 group of YC bright signal pin, 1 group of YPbPr line by line scan color difference signal pin and 2 groups of high definition color difference signal pins.
3, inter-board interface according to claim 2, it is characterized in that: described TV signal is the signal by tuner demodulation output, comprise middle frequency difference sub-signal, intermediate-frequency gain control signal and rf gain control signal, in described socket and plug, be respectively arranged with two groups of function pins that transmit such signal.
4, inter-board interface according to claim 1 is characterized in that: in described socket and plug, the function pin of transmitting audio signal comprises 1 road L channel audio frequency output pin, 1 road right audio channel output pin and 1 way word audio interface pin; Wherein, the left and right sound channels audio signal is separated output, digital audio interface pin transmission of digital audio signal by the tuner demodulation.
5, inter-board interface according to claim 1 is characterized in that: in described socket and plug, the function pin of transfer bus signal comprises two groups at least, is connected between the integrated chip on digiboard and the mainboard transmission I 2The C bus signals; Wherein between the master chip that a group is connected on tuner and the mainboard.
6, inter-board interface according to claim 5 is characterized in that: in described socket and plug, the function pin of transfer bus signal comprises 5 groups.
7, inter-board interface according to claim 1, it is characterized in that: in described socket and plug, the function pin of transmission power supply comprises that at least 4 tunnel, 1 tunnel transmission 12V DC power supply, 1 tunnel transmits big electric current 5V power supply, 1 tunnel transmission low current 5V power supply, another road transmit corresponding current potential according to the concrete needs of preheating amplification circuit on the digiboard DC power supply.
8, according to each described inter-board interface in the claim 1 to 7, it is characterized in that: the function pin that in described socket and plug, also comprises transmission row field sync signal, push button signalling, remote signal, mute signal and power supply indicator control signal.
9, inter-board interface according to claim 8 is characterized in that: in described inter-board interface, the function pin of each group transmission unlike signal all has at least one tunnel ground pin corresponding with it.
10, inter-board interface according to claim 9 is characterized in that: described inter-board interface is made up of the socket and the plug of 2 double 40 pins, and wherein, the contact pin of plug adopts gilding to make.
CNU2007200305842U 2007-12-26 2007-12-26 Interface between plates of digital television Expired - Fee Related CN201134880Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010145406A1 (en) * 2009-11-03 2010-12-23 中兴通讯股份有限公司 Audio and video interface and method for displaying negotiation between display device and source device
CN107038990A (en) * 2017-05-09 2017-08-11 西安诺瓦电子科技有限公司 Connector assembly, display screen control card and display screen system
CN108282628A (en) * 2018-02-09 2018-07-13 深圳创维-Rgb电子有限公司 TV motherboard, TV motherboard component and DTV
WO2021000307A1 (en) * 2019-07-03 2021-01-07 西安诺瓦星云科技股份有限公司 Plug-in assembly, display control card and display system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010145406A1 (en) * 2009-11-03 2010-12-23 中兴通讯股份有限公司 Audio and video interface and method for displaying negotiation between display device and source device
CN107038990A (en) * 2017-05-09 2017-08-11 西安诺瓦电子科技有限公司 Connector assembly, display screen control card and display screen system
CN107038990B (en) * 2017-05-09 2019-12-24 西安诺瓦星云科技股份有限公司 Plug-in assembly, display screen control card and display screen system
CN108282628A (en) * 2018-02-09 2018-07-13 深圳创维-Rgb电子有限公司 TV motherboard, TV motherboard component and DTV
WO2021000307A1 (en) * 2019-07-03 2021-01-07 西安诺瓦星云科技股份有限公司 Plug-in assembly, display control card and display system

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081015

Termination date: 20111226