CN102595077A - Digital display with detachable external Tuner extension module - Google Patents
Digital display with detachable external Tuner extension module Download PDFInfo
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- CN102595077A CN102595077A CN2012100311730A CN201210031173A CN102595077A CN 102595077 A CN102595077 A CN 102595077A CN 2012100311730 A CN2012100311730 A CN 2012100311730A CN 201210031173 A CN201210031173 A CN 201210031173A CN 102595077 A CN102595077 A CN 102595077A
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Abstract
The invention discloses a digital display with a detachable external Tuner extension module. The digital display comprises a digital display and the external Tuner extension module. The digital display is provided with a jack for plugging the external Tuner extension module. The external Tuner extension module is provided with a corresponding plugging part. An interface circuit is arranged in each of the jack and the plugging part, and the interface circuits can be jointed with each other. The digital display also comprises a video signal processing module, a low voltage differential signaling (LVDS) module, a digital video broadcasting (DVB) or advanced television system committee (ATSC) demodulation decoding module and a central processing module. The external Tuner extension module also comprises a radio frequency (RF) module and an RF signal switching module. When the external Tuner extension module is not plugged into the digital display, the digital display has complete display functions; and when the external Tuner extension module is plugged into the digital display, the digital display has complete television receiving functions. The digital display has the characteristic of simple circuit interface; and complexity in the design of a printed circuit board (PCB) of a digital display terminal can be effectively lowered, the volume of the PCB of the digital display terminal can be effectively reduced, production cost can be decreased, and the extensibility of the digital display can be enhanced.
Description
Technical field
The present invention relates to field, digital multimedia terminal, particularly relate to a kind of digital display with detachable external Tuner expansion module.
Background technology
TV in global evolution very extensively mainly divides simulated television and DTV, and different areas is developed and different TV broadcasting systems.
A kind of scheme of prior art is that video signal processing module, LVDS signaling module and DVB or ATSC demodulating and decoding module, RF module all are integrated on the same PCB.
Adopt the TV of this technical scheme, its deficiency is: need adopt the different different mainboards of modulation solution development according to different markets, the solution development difficulty is big, the cycle is long.Present DTV processing scheme, demodulation scheme and silicon Tuner scheme update fast, and this technical scheme significant adverse is in the quick development requires of product; In order to guarantee good receptivity, the RF module is had relatively high expectations to PCB material, cabling and processing technology, when the RF module is had relatively high expectations to PCB, has also increased the cost of other modules PCB in the lump.
The another kind of scheme of prior art is independently to become an independent external Tuner module to come out modulation module, RF module; Form the outer Tuner module of a machine, the RF signal is demodulated into image intermediate frequency signal VIF to the outer Tuner module of machine or TS stream signal is transferred to the corresponding digital display.
Adopt the TV of another kind of technical scheme; Its deficiency is: TS stream signal adopts serial or parallel mode; The data wire that needs is many; Serial TS stream needs 4 holding wires, and parallel TS stream needs 11 holding wires, and the clock signal of its higher-frequency can produce signal reflex and cause electromagnetic interference problem at interface.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of digital display with detachable external Tuner expansion module is provided, and when external Tuner expansion module was not pegged graft, this digital display possessed complete display function; When external Tuner expansion module is pegged graft; This digital display possesses complete television receiving function, has the circuit interface characteristic of simple, can effectively reduce the PCB motherboard design complexity and the volume at digital display terminal; Reduce production costs, strengthen the autgmentability of digital display.
The technical solution adopted for the present invention to solve the technical problems is: a kind of digital display with detachable external Tuner expansion module comprises: digital display and external Tuner expansion module; This digital display is provided with the socket of the said external Tuner expansion module that can be used for pegging graft; Said external Tuner expansion module is provided with the Plug Division of the socket that can be matched with said digital display, in the Plug Division of the socket of digital display and external Tuner expansion module, is respectively equipped with the interface circuit that can dock each other; Also include video signal processing module, LVDS signaling module, DVB or ATSC demodulating and decoding module and central processing module in this digital display; The input of video signal processing module is connected with the output of LVDS signaling module; The input of LVDS signaling module is connected with the output of DVB or ATSC demodulating and decoding module; The input of DVB or ATSC demodulating and decoding module is connected with the interface circuit of digital display, and central processing module is connected with the interface circuit of video signal processing module, LVDS signaling module, DVB or ATSC demodulating and decoding module and digital display respectively; Also include RF module and RF signaling switch module in this external Tuner expansion module; Said RF signaling switch module is connected with the interface circuit of external Tuner expansion module; The output of said RF signaling switch module is connected to the input of RF module, and RF signaling switch module is selected to switch to the wired RF signal and the wireless RF signal that can receive simultaneously, and the RF signal after the output of RF module is switched; The RF module is connected with the interface circuit of external Tuner expansion module; The interface circuit of RF module through external Tuner expansion module obtains power supply signal, and the RF module is to export to digital display through the interface circuit of external Tuner expansion module behind the Low Medium Frequency differential signal DIF with the RF conversion of signals.
Described RF module is the silicon wafer tuner.
Be respectively equipped with the power supply signal interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module; The power supply signal interface of the interface circuit of digital display is connected with the interior power-supply system of digital display, and the power supply signal interface of the interface circuit of external Tuner expansion module is connected with RF signaling switch module with the RF module respectively.
Also be respectively equipped with the signal recognition interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module; The signal recognition interface of the interface circuit of digital display is connected with the central processing module of digital display, and whether central processing module is differentiated external Tuner expansion module through the signal recognition interface of the interface circuit of digital display and plugged with digital display.
Also be respectively equipped with GPIO interface, iic bus interface and the Low Medium Frequency differential signal interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module.
The SOC system level chip is housed in the described digital display, and described video signal processing module, LVDS signaling module and DVB or ATSC demodulating and decoding module are integrated in respectively in the SOC system level chip.
A kind of processing method of the digital display with detachable external Tuner expansion module, it comprises the steps:
A. digital display carries out the normal play of video image as display function;
B. the central processing module of digital display is that the TNR_DET-end is differentiated to the signal recognition interface of the interface circuit of digital display; When electricity is high level, return step a, when being low level, continue next step;
C. external Tuner expansion module is carried out initialization process;
D. judge whether to switch to the television reception channel; If continuation next step; If for otherwise return step a;
E. control RF signaling switch module and carry out the switching of wired RF signal and wireless RF signal;
F. controlling the RF module is Low Medium Frequency differential signal DIF output with the RF conversion of signals;
G. control DVB or ATSC demodulating and decoding module and carry out Low Medium Frequency differential signal DIF demodulating and decoding;
H. controls playing TV programme.
A kind of digital display of the present invention with detachable external Tuner expansion module; Comprise digital display and external Tuner expansion module; Said digital display possesses the identification of external Tuner expansion module and controlled function, realizes the flexible Application of digital display received tv broadcast signal.This digital display itself comprises video signal processing module, LVDS signaling module and DVB or ATSC demodulating and decoding module, also can be separately as digital display work under the situation of said external Tuner expansion module of not plugging into.This external Tuner expansion module; Can the RF signal is converted into the Low Medium Frequency differential signal and be transferred to digital display through the interface circuit of external Tuner expansion module and the interface circuit of digital display, external Tuner expansion module be supported among NTSC-M/N, NTSC-J, NTSC-4.43, PAL-D/K, PAL-60, PAL-I, PAL-B/G, PAL-M, PAL-I, SECAM L/L ', ATSC, DVB-T, DVB-T2, DVB-C, DVB-TH, ABS-S, DMB-T/H, the ISDB-T any one to RF signal transformation function.Digital display is plugged into through interface circuit behind the said external Tuner expansion module, and said digital display promptly possesses complete television receiving function.The RF module, adopting the silicon wafer tuner is silicon Tuner, supports the tv rf signal of most of standard in the global range.Digital display is realized power supply, identification and drive controlling to said external Tuner expansion module through interface circuit.
The invention has the beneficial effects as follows; Owing to adopted digital display and external Tuner expansion module to constitute digital display with detachable external Tuner expansion module; And this digital display is provided with the socket of the said external Tuner expansion module that can be used for pegging graft; Said external Tuner expansion module is provided with the Plug Division of the socket that can be matched with said digital display, in the Plug Division of the socket of digital display and external Tuner expansion module, is respectively equipped with the interface circuit that can dock each other; Through interface circuit external Tuner expansion module is connected with digital display; When external Tuner expansion module is not pegged graft; This digital display possesses complete display function, and when external Tuner expansion module was pegged graft, this digital display possessed complete television receiving function.Compared with prior art, have following beneficial effect:
1, the RF module is not integrated in the same SOC system level chip with video signal processing module, LVDS signaling module and DVB or ATSC demodulating and decoding module; Can effectively reduce the PCB motherboard design complexity and the volume at digital display terminal; Reduce production costs, strengthen the autgmentability of digital display;
2, the interface circuit design of the interface circuit of digital display and external Tuner expansion module is simple, makes things convenient for digital display quick identification and driving, is used to increase the design versatility of different systems TV, reduces design difficulty;
3, digital display possesses complete display function, also can operate as normal under the situation of said external Tuner expansion module of not plugging into, for the consumer who does not need television receiving function saves cost to greatest extent;
4, adopt detachable external Tuner expansion module, be simple and easy to usefulness, make things convenient for domestic consumer's said external Tuner expansion module of plugging into voluntarily;
Receive when 5, utilizing RF signaling switch module to realize wired RF signal and wireless RF signal, avoid the frequent plug wire of user to switch wired RF signal and wireless RF signal.
6, utilize signal recognition interface in the interface circuit, when digital display was plugged into the above external Tuner expansion module, said digital display can be discerned through the signal that simply reads the signal recognition interface, saves start and detects recognition time.
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain; But a kind of digital display with detachable external Tuner expansion module of the present invention is not limited to embodiment.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the circuit diagram of the interface circuit (interface circuit of external Tuner expansion module) of digital display of the present invention;
Fig. 3 is the flow chart that the central processing module of digital display of the present invention detects external Tuner expansion module.
Embodiment
Embodiment, referring to shown in Figure 1, a kind of digital display with detachable external Tuner expansion module of the present invention comprises: digital display 1 and external Tuner expansion module 2; This digital display 1 is provided with the socket of the said external Tuner expansion module that can be used for pegging graft; Said external Tuner expansion module 2 is provided with the Plug Division of the socket that can be matched with said digital display; In the Plug Division of the socket of digital display 1 and external Tuner expansion module, be respectively equipped with the interface circuit that can dock each other; That is, the interface circuit 10 of digital display 1, the interface circuit 20 of external Tuner expansion module; Also include video signal processing module 11, LVDS signaling module 12, DVB or ATSC demodulating and decoding module 13 and central processing module 14 in this digital display 1; The input of LVDS signaling module 12 is connected with the output of video signal processing module 11; The input of video signal processing module 11 is connected with the output of DVB or ATSC demodulating and decoding module 13; The input of DVB or ATSC demodulating and decoding module 13 is connected with the interface circuit 10 of digital display, and central processing module 14 is connected with the interface circuit 10 of video signal processing module 11, LVDS signaling module 12, DVB or ATSC demodulating and decoding module 13 and digital display respectively; Also include RF module 21 and RF signaling switch module 22 in this external Tuner expansion module 2; Said RF signaling switch module 22 is connected with the interface circuit 20 of external Tuner expansion module; The output of said RF signaling switch module 22 is connected to the input of RF module 21, and wired RF signal that 22 pairs of RF signaling switch modules can receive simultaneously and wireless RF signal are selected to switch, and the RF signal after 21 outputs of RF module are switched; RF module 21 is connected with the interface circuit 20 of external Tuner expansion module; RF module 21 obtains power supply signals through the interface circuit 20 of external Tuner expansion module, and RF module 21 is to export to digital display 1 through the interface circuit 20 of external Tuner expansion module behind the Low Medium Frequency differential signal DIF with the RF conversion of signals.
Described RF module 21 is the silicon wafer tuner.
Referring to shown in Figure 2; The interface circuit 10 of described digital display is identical with the formation of the interface circuit 20 of external Tuner expansion module; Wherein, The interface circuit 10 of digital display is designed to the female type structure; The interface circuit 20 of external Tuner expansion module is designed to the plug-type structure, and plugging of the female type structure of the plug-type structure of the interface circuit through external Tuner expansion module and the interface circuit of digital display connects the interface circuit 10 of digital display and the interface circuit 20 of external Tuner expansion module.
Be respectively equipped with the power supply signal interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module; The power supply signal interface of the interface circuit of digital display is connected with the interior power-supply system of digital display, and the power supply signal interface of the interface circuit of external Tuner expansion module is connected with RF signaling switch module with the RF module respectively.
Also be respectively equipped with the signal recognition interface (being the TNR_DET-terminals among Fig. 2) that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module; The signal recognition interface of the interface circuit of digital display is connected with the central processing module of digital display, and whether central processing module is differentiated external Tuner expansion module through the signal recognition interface of the interface circuit of digital display and plugged with digital display.When digital display 1 was plugged into the above external Tuner expansion module 2, the TNR_DET-signal of said signal recognition interface was dragged down, and said digital display 1 can be discerned through simply reading the TNR_DET-signal, saved start and detected recognition time.
Also be respectively equipped with GPIO interface (being SYS-RESET, the RF-SEL terminals among Fig. 2), iic bus interface (being SCL, the SDA terminals among Fig. 2) and the Low Medium Frequency differential signal interface (being DIF+, the DIF-terminals among Fig. 2) that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module.
The SOC system level chip is housed in the described digital display, and described video signal processing module, LVDS signaling module and DVB or ATSC demodulating and decoding module are integrated in respectively in the SOC system level chip.
A kind of digital display of the present invention with detachable external Tuner expansion module; Comprise digital display 1 and external Tuner expansion module 2; Said digital display 1 possesses identification and the controlled function to external Tuner expansion module, realizes the flexible Application of digital display 1 received tv broadcast signal.This digital display 1 itself comprises video signal processing module 11, LVDS signaling module 12 and DVB or ATSC demodulating and decoding module 13, also can be separately as digital display work under the situation of said external Tuner expansion module 2 of not plugging into.This external Tuner expansion module 2; Can the RF signal is converted into the Low Medium Frequency differential signal and be transferred to digital display through the interface circuit 20 of external Tuner expansion module and the interface circuit 10 of digital display, 2 pairs of RF signals of external Tuner expansion module transformation function be supported any one among NTSC-M/N, NTSC-J, NTSC-4.43, PAL-D/K, PAL-60, PAL-I, PAL-B/G, PAL-M, PAL-I, SECAM L/L ', ATSC, DVB-T, DVB-T2, DVB-C, DVB-TH, ABS-S, DMB-T/H, the ISDB-T.Digital display 1 is plugged into through interface circuit behind the said external Tuner expansion module 2, and said digital display 1 promptly possesses complete television receiving function.RF module 21, adopting the silicon wafer tuner is silicon Tuner, supports the tv rf signal of most of standard in the global range.Digital display 1 is realized power supply, identification and drive controlling to said external Tuner expansion module through interface circuit.
Referring to shown in Figure 3, the processing method of a kind of digital display with detachable external Tuner expansion module of the present invention, that is, the flow process that the central processing module of digital display detects external Tuner expansion module is following:
A, digital display carry out the normal play of video image as display function;
The signal recognition interface of the interface circuit 10 of 14 pairs of digital displays of central processing module of b, digital display is that the TNR_DET-end is differentiated; When electricity is high level, return step S1, when being low level, continue next step;
C, external Tuner expansion module is carried out initialization process;
D, judge whether to switch to the television reception channel; If continuation next step; If for otherwise return step a;
E, control RF signaling switch module 22 are carried out the switching of wired RF signal and wireless RF signal;
F, control RF module 21 are Low Medium Frequency differential signal DIF output with the RF conversion of signals;
G, control DVB or ATSC demodulating and decoding module 13 are carried out Low Medium Frequency differential signal DIF demodulating and decoding;
H, controls playing TV programme.
The foregoing description only is used for further specifying a kind of digital display with detachable external Tuner expansion module of the present invention; But the present invention is not limited to embodiment; Every foundation technical spirit of the present invention all falls in the protection range of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1. the digital display with detachable external Tuner expansion module is characterized in that: comprise digital display and external Tuner expansion module; This digital display is provided with the socket of the said external Tuner expansion module that can be used for pegging graft; Said external Tuner expansion module is provided with the Plug Division of the socket that can be matched with said digital display, in the Plug Division of the socket of digital display and external Tuner expansion module, is respectively equipped with the interface circuit that can dock each other; Also include video signal processing module, LVDS signaling module, DVB or ATSC demodulating and decoding module and central processing module in this digital display; The input of LVDS signaling module is connected with the output of video signal processing module; The input of video signal processing module is connected with the output of DVB or ATSC demodulating and decoding module; The input of DVB or ATSC demodulating and decoding module is connected with the interface circuit of digital display, and central processing module is connected with the interface circuit of video signal processing module, LVDS signaling module, DVB or ATSC demodulating and decoding module and digital display respectively; Also include RF module and RF signaling switch module in this external Tuner expansion module; Said RF signaling switch module is connected with the interface circuit of external Tuner expansion module; The output of said RF signaling switch module is connected to the input of RF module, and RF signaling switch module is selected to switch to the wired RF signal and the wireless RF signal that can receive simultaneously, and the RF signal after the output of RF module is switched; The RF module is connected with the interface circuit of external Tuner expansion module; The interface circuit of RF module through external Tuner expansion module obtains power supply signal, and the RF module is to export to digital display through the interface circuit of external Tuner expansion module behind the Low Medium Frequency differential signal DIF with the RF conversion of signals.
2. the digital display of the detachable external Tuner expansion module of band according to claim 1 is characterized in that: described RF module is the silicon wafer tuner.
3. the digital display of the detachable external Tuner expansion module of band according to claim 1; It is characterized in that: be respectively equipped with the power supply signal interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module; The power supply signal interface of the interface circuit of digital display is connected with the interior power-supply system of digital display, and the power supply signal interface of the interface circuit of external Tuner expansion module is connected with RF signaling switch module with the RF module respectively.
4. the digital display of the detachable external Tuner expansion module of band according to claim 1; It is characterized in that: also be respectively equipped with the signal recognition interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module; The signal recognition interface of the interface circuit of digital display is connected with the central processing module of digital display, and whether central processing module is differentiated external Tuner expansion module through the signal recognition interface of the interface circuit of digital display and plugged with digital display.
5. the digital display of the detachable external Tuner expansion module of band according to claim 1 is characterized in that: also be respectively equipped with GPIO interface, iic bus interface and the Low Medium Frequency differential signal interface that can dock each other in the interface circuit of the interface circuit of described digital display and external Tuner expansion module.
6. the digital display of the detachable external Tuner expansion module of band according to claim 1; It is characterized in that: the SOC system level chip is housed in the described digital display, and described video signal processing module, LVDS signaling module and DVB or ATSC demodulating and decoding module are integrated in respectively in the SOC system level chip.
7. the processing method of the digital display of the detachable external Tuner expansion module of band as claimed in claim 1, it is characterized in that: it comprises the steps:
A. digital display carries out the normal play of video image as display function;
B. the central processing module of digital display is that the TNR_DET-end is differentiated to the signal recognition interface of the interface circuit of digital display; When electricity is high level, return step a, when being low level, continue next step;
C. external Tuner expansion module is carried out initialization process;
D. judge whether to switch to the television reception channel; If continuation next step; If for otherwise return step a;
E. control RF signaling switch module and carry out the switching of wired RF signal and wireless RF signal;
F. controlling the RF module is Low Medium Frequency differential signal DIF output with the RF conversion of signals;
G. control DVB or ATSC demodulating and decoding module and carry out Low Medium Frequency differential signal DIF demodulating and decoding;
H. controls playing TV programme.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100311730A CN102595077A (en) | 2012-02-10 | 2012-02-10 | Digital display with detachable external Tuner extension module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100311730A CN102595077A (en) | 2012-02-10 | 2012-02-10 | Digital display with detachable external Tuner extension module |
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| CN102595077A true CN102595077A (en) | 2012-07-18 |
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| CN2012100311730A Pending CN102595077A (en) | 2012-02-10 | 2012-02-10 | Digital display with detachable external Tuner extension module |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883193A (en) * | 2003-11-14 | 2006-12-20 | 英特尔公司 | Interchangeable media input cartridge for home entertainment |
| CN1946155A (en) * | 2005-10-09 | 2007-04-11 | 广达电脑股份有限公司 | Tuner module |
| CN201726484U (en) * | 2010-05-05 | 2011-01-26 | 深圳市同洲电子股份有限公司 | Digital television reception terminal |
| CN201904861U (en) * | 2010-12-10 | 2011-07-20 | 陕西凌华电子有限公司 | Satellite digital electronic turner |
-
2012
- 2012-02-10 CN CN2012100311730A patent/CN102595077A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883193A (en) * | 2003-11-14 | 2006-12-20 | 英特尔公司 | Interchangeable media input cartridge for home entertainment |
| CN1946155A (en) * | 2005-10-09 | 2007-04-11 | 广达电脑股份有限公司 | Tuner module |
| CN201726484U (en) * | 2010-05-05 | 2011-01-26 | 深圳市同洲电子股份有限公司 | Digital television reception terminal |
| CN201904861U (en) * | 2010-12-10 | 2011-07-20 | 陕西凌华电子有限公司 | Satellite digital electronic turner |
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Application publication date: 20120718 |