CN210225629U

CN210225629U - DTMB high definition digital television all-in-one machine with WiFi function

Info

Publication number: CN210225629U
Application number: CN201920581746.4U
Authority: CN
Inventors: Zhiqiang Wu; 吴志强
Original assignee: Shenzhen Riqin Technology Co Ltd
Current assignee: Shenzhen Riqin Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-03-31
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a DTMB high definition digital television integrated machine with WiFi function, which comprises a main control module, an audio and video receiving module, a display module, a power amplifier output module and a WiFi module, wherein the audio and video receiving module, the display module, the power amplifier output module and the WiFi module are electrically connected with the main control module; the audio and video receiving module comprises a decoding circuit, the decoding circuit is connected with the main control module, the audio and video receiving module also comprises a tuning circuit and a CA decryption circuit, and the other end of the tuning circuit is connected with an external antenna ANT 1; the display module comprises an LVDS display screen J10F; the WiFi module comprises a wireless chip U12, the input end of a wireless chip U12 is connected with the main chip U13 and the power supply end, and the output end of the wireless chip U12 is connected with an interface J3G 1. The utility model discloses circuit structure is simple, can support to receive multiple TV program signal.

Description

DTMB high definition digital television all-in-one machine with WiFi function

Technical Field

The utility model relates to a digital television technical field specifically relates to a DTMB high definition digital television all-in-one with wiFi function.

Background

The early coding stage of the DTMB digital television signal mainly comprises MPEG \ AVS, 12 sets of standard definition programs are transmitted at a single frequency point, the image resolution reaches 480i, and the user experience is very poor; later, an operator upgrades the encoder to H.264\ AVS +, the image resolution reaches 576i, 12 programs are transmitted at a single frequency point, the user experience is still not good, and particularly, the image quality is poor on a television with the size of more than 40 inches; in order to obtain better user experience, an operator adopts an H.264\ AVS + coding format, transmits high-definition programs with the resolution of more than 720P, but can only transmit 2-3 sets of high-definition programs under the limitation of the compression ratio of an encoder. Most of set top boxes purchased by consumers at present and capable of watching local radio and television encrypted programs are CVBS (analog video broadcast and television) signal output, the definition of image quality is not enough, and the advantages of digital televisions cannot be reflected. At present, the television set sold in the market can only be called as a display at best because the product does not support digital television program reception, or the television set has the function of receiving DTMB digital television and only watches free programs but cannot watch encrypted programs, and the existing set-top box is usually only used for receiving television program signals but does not support the playing function and the WiFi function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, can support to receive multiple DTMB digital television program signal and can push away the DTMB high definition digital television all-in-one machine that has the wiFi function of screen function.

The utility model discloses a technical scheme that DTMB high definition digital television all-in-one adopted with wiFi function is:

the utility model provides a DTMB high definition digital television all-in-one with wiFi function, includes host system, still include with host system electric connection's audio frequency and video receiving module, display module, power amplifier output module and wiFi module.

The audio and video receiving module comprises a decoding circuit, the decoding circuit is connected with the main control module, the audio and video receiving module further comprises a tuning circuit and a CA decryption circuit, the tuning circuit is connected with the decoding circuit, and the other end of the tuning circuit is connected with an external antenna ANT 1.

The display module comprises an LVDS display screen J10F, and further comprises a first input circuit, a second input circuit and a driving circuit which are connected with the LVDS display screen J10F, wherein the input ends of the first input circuit, the second input circuit and the driving circuit are connected with the main control module and the power supply end.

The WiFi module comprises a wireless chip U12, the input end of a wireless chip U12 is connected with the main chip U13 and the power supply end, and the output end of the wireless chip U12 is connected with an interface J3G 1.

Preferably, the main control module comprises a main chip U13, and the main chip U13 comprises three parts, namely U13A, U13B and U13C.

Preferably, the pin 5 of the wireless chip U12 is a power supply input terminal, the pin 5 of the chip U12 is connected in series with a resistor R15F, the other end of the resistor R15F is connected with a power supply terminal, a capacitor C9F and a capacitor E1F are further connected in parallel between the pin 5 of the wireless chip U12 and the resistor R15F, the pin 6 and the pin 7 of the wireless chip U12 are respectively connected with the pin B2 and the pin B1 of the main chip U13, the pin of the wireless chip U12 is connected in series with an inductor L0402, and the other end of the inductor L0402 is connected with the interface J3G 1.

As a preferred scheme, the power amplifier output module comprises a power amplifier chip U3F, and further comprises a power amplifier input circuit and an interface J2, wherein the input end of the power amplifier input circuit is connected with the main chip U13 and the power supply end, the output end of the power amplifier input circuit is connected with the interface J2, and the interface J2 is a buzzer.

Preferably, the audio/video receiving module includes a demodulation circuit, the demodulation circuit includes a tuning chip U1T, the tuning chip U1T is connected to the main chip U13, and the tuning chip U1T is further connected to an external antenna ANT 1.

As a preferred scheme, the main chip U13 is further connected to a CA encryption module, a USB interface module, a data debugging interface module, a remote control interface module, a plug-in storage module, a key function control interface module, a high definition input interface module, an external video/audio input interface module, and a key sampling voltage module.

Preferably, the CA encryption module includes an encryption interface CON2, a data connection port of the encryption interface CON2 is connected to the main chip U13, and a power supply input end of the encryption interface CON2 is connected to a power supply end.

Preferably, the USB interface module includes an interface J1F, a power supply pin 1 of the interface J1F is connected to a 5V power supply terminal, and a pin 2 and a pin 3 of the interface J1F are connected to the main chip U13. The high-definition input interface module comprises an interface J13F, and further comprises a chip D4F and a chip D3F which are connected with the interface J13F, and the output ends of the chip D4F and the chip D3F are connected with a main chip U13.

Preferably, the main chip U13 is further connected to a power module, the power module includes a 5V input circuit, a 3.3V input circuit, a 1.8V input circuit, and a 1.2V input circuit, the input ends of the 5V input circuit, the 3.3V input circuit, the 1.8V input circuit, and the 1.2V input circuit are connected to an external power supply, and the output ends of the 5V input circuit, the 3.3V input circuit, the 1.8V input circuit, and the 1.2V input circuit are connected to an internal circuit module.

The utility model discloses a DTMB high definition digital television all-in-one with wiFi function, external antenna ANT1 receives outside audio and video signal and then feeds back to demodulation circuit, demodulation circuit demodulates received audio and video, convert intermediate frequency audio and video signal transmission and give host system, host system decodes intermediate frequency audio and video signal, the audio and video signal after decoding is transmitted for display module by host system, display module carries out the broadcast of audio and video. The utility model discloses STB and TV set integration not only can carry out the receipt of TV program signal, can also show to wireless chip U12 of wiFi module can make the utility model discloses connecting network makes its and cell-phone be in same network, through many screen interaction options on the cell-phone, projects the audio and video signal on the cell-phone on the local screen, perhaps in cell-phone and local internet access to same WIFI network, throws the screen option through the DLNA of cell-phone video APP the inside, projects the audio and video signal on the cell-phone on the local screen.

Drawings

Fig. 1 is the utility model discloses a module structure schematic diagram of DTMB high definition digital television all-in-one with wiFi function.

Fig. 2 is the utility model discloses a main chip U13's of DTMB high definition digital television all-in-one with wiFi function main control module's structural schematic.

Fig. 3 is a schematic structural diagram of the main chip U13 of the receiving module of the DTMB high-definition digital television all-in-one machine with WiFi function of the present invention.

Fig. 4 is a schematic structural diagram of the main chip U13 of the output module of the DTMB high-definition digital television all-in-one machine with WiFi function of the present invention.

Fig. 5 is the utility model discloses an audio and video receiving module's of DTMB high definition digital television all-in-one with wiFi function structural schematic diagram.

Fig. 6 is the utility model discloses a structure schematic diagram of the wiFi module of DTMB high definition digital television all-in-one with wiFi function.

Fig. 7 is the utility model discloses a power amplifier output module's of DTMB high definition digital television all-in-one with wiFi function structural schematic diagram.

Fig. 8 is the utility model discloses a power amplifier output module's of DTMB high definition digital television all-in-one with wiFi function structural schematic diagram.

Fig. 9 is a schematic structural diagram of a driving circuit of a display module of the DTMB high-definition digital television all-in-one machine with WiFi function.

Fig. 10 is a schematic structural diagram of an LVDS display screen J10F of a display module of the DTMB high-definition digital television all-in-one machine with the WiFi function.

Fig. 11 is the utility model discloses a display module's of DTMB high definition digital television all-in-one with wiFi function structural schematic diagram.

Fig. 12 is the utility model discloses a CA decryption module's of DTMB high definition digital television all-in-one with wiFi function structural schematic diagram.

Fig. 13 is a schematic structural diagram of a USB interface module of the DTMB high-definition digital television all-in-one machine with WiFi function.

Fig. 14 is the utility model discloses a power amplifier output module's earphone amplifier circuit of DTMB high definition digital television all-in-one with wiFi function's structural schematic diagram.

Detailed Description

The invention will be further elucidated and described with reference to the following embodiments and drawings in which:

referring to fig. 1, the DTMB high-definition digital television all-in-one machine with the WiFi function includes a main control module, and further includes an audio and video receiving module, a display module, a power amplifier output module and a WiFi module, which are electrically connected to the main control module.

Referring to fig. 2, 3 and 4, the main control module includes a main chip U13, the main chip U13 has a model of HI2611M2, the main chip U13 includes three parts, which are divided into U13A, U13B and U13C, and the main chip U13 supports h.264 decoding, AVS + decoding, AVS decoding and MPEG decoding.

Referring to fig. 5, the audio/video receiving module includes a demodulation circuit, the demodulation circuit includes a tuning chip U1T, the tuning chip U1T is connected to the main chip U13, the tuning chip U1T is further connected to an external antenna ANT1, the external antenna ANT1 receives an external audio/video television signal, the external audio/video television signal is demodulated by a tuning chip U1T, an intermediate frequency IF signal is output to the main chip U13, and finally the intermediate frequency IF signal is decoded by the main chip U13 and output to the display module, and the display module displays a video. The pin 20 and the pin 22 of the tuning chip U1T are connected with an external antenna ANT1, the pin 11 and the pin 10 of the tuning chip U1T output intermediate frequency IF signals, and the pin 2, the pin 3 and the pin 5 of the tuning chip U1T are used for data transmission with the main chip U13.

Referring to fig. 9, 10 and 11, the display module includes an LVDS display screen J10F, a first input circuit and a second input circuit, and a driving circuit. The first input circuit comprises an interface J4, wherein

pins

5 and 6 of the interface J4 are connected with the main chip U13, and pin 4 of the interface J4 is connected with a power supply terminal and the main chip U13. The second input circuit comprises an interface J3, wherein

pins

1 and 2 of the interface J3 are connected with the main chip U13, and pin 3 of the interface J3 is connected with a power supply terminal and the main chip U13. The drive circuit includes interface J7, 5V supply end and 12V supply end are connected respectively to interface J7's pin 1 and pin 3, interface J7's pin 2 is connected with field effect transistor Q2G, field effect transistor Q2G is the P channel field effect transistor, field effect transistor Q2G's grid is connected with triode Q3G, triode Q3G's base is connected main chip U13, field effect transistor Q2G's drain electrode is connected LVDS display screen J10F.

Referring to fig. 7 and 8, the power amplifier output module includes a power amplifier chip U3F, a power amplifier input circuit and an interface J2, an input end of the power amplifier input circuit is connected to the main chip U13 and a power supply end, an output end of the power amplifier input circuit is connected to the interface J2, the interface J2 is a buzzer, the power amplifier output module further includes an earphone amplifier circuit, an input end of the earphone amplifier circuit is connected to the main chip U13, an output end of the earphone amplifier circuit is connected to the interface XS1, and the type of the interface XS1 is GBDH 7003.

Referring to fig. 6, the WiFi module includes a wireless chip U12, a wireless chip U12 is RL8188, an input terminal of the wireless chip U12 is connected to the main chip U13 and a power supply terminal, and an output terminal of the wireless chip U12 is connected to the interface J3G 1. The pin 5 of the wireless chip U12 is a power supply input end, the pin 5 of the chip U12 is connected in series with a resistor R15F, the other end of the resistor R15F is connected with a power supply end, a capacitor C9F and a capacitor E1F are further connected in parallel between the pin 5 of the wireless chip U12 and the resistor R15F, the pin 6 and the pin 7 of the wireless chip U12 are respectively connected with the pin B2 and the pin B1 of the main chip U13, the pin of the wireless chip U12 is connected in series with an inductor L0402, and the other end of the inductor L0402 is connected with the interface J3G 1.

Referring to fig. 1, 12, 13 and 14, the main chip U13 is further connected to a CA encryption module, a USB interface module, a data debugging interface module, a remote control interface module, a plug-in storage module, a key function control interface module, a high definition input interface module, an external video/audio input interface module and a key sampling voltage module. The data debugging interface module is used for debugging internal data parameters, the remote control interface module is used for remote control, the plug-in storage module is used for storing information and improving storage, the key function control interface module is convenient for a user to operate and control, and the high-definition input interface module and the external video/audio input interface module are used for transmitting external audio/video signals.

The CA encryption module comprises an encryption interface CON2, a data connection port of the encryption interface CON2 is connected with the main chip U13, a power supply input end of the encryption interface CON2 is connected with a 3.3V power supply end, a power supply input end of the encryption interface CON2 is further connected with a triode Q2C, a collector of the triode Q2C is connected with the power supply input end of the encryption interface CON2, an emitter of the triode Q2C is connected with a 3.3V power supply end, a base of the triode Q2C is connected with a resistor R4C in series, the other end of the resistor R4C is connected with a collector of the triode Q1G, a resistor R3C is further connected between a collector of the triode Q1G and an emitter of the triode Q2C, an emitter of the triode Q1G is grounded, a base of the triode Q1G is connected with a resistor R2C in series, and the other end. CA encryption module is used for acquireing the broadcast television and TV and encrypts TV program information, makes the utility model discloses can receive the broadcast television and encrypt TV program, increase the broadcast quantity of TV program.

The USB interface module comprises an interface J1F, a power supply pin 1 of the interface J1F is connected with a 5V power supply end, and a pin 2 and a pin 3 of the interface J1F are connected with a main chip U13. The high-definition input interface module comprises an interface J13F, and further comprises a chip D4F and a chip D3F which are connected with the interface J13F, and the output ends of the chip D4F and the chip D3F are connected with a main chip U13. The USB interface module is used for transmitting data.

The utility model discloses a DTMB high definition digital television all-in-one with wiFi function, external antenna ANT1 receives outside audio and video signal and then feeds back to demodulation circuit, demodulation circuit demodulates received audio and video, convert intermediate frequency audio and video signal transmission and give host system, host system decodes intermediate frequency audio and video signal, the audio and video signal after decoding is transmitted for display module by host system, display module carries out the broadcast of audio and video. Because the utility model discloses increased the wiFi module, can be with the same network of being connected with the cell-phone simultaneously, consequently, the utility model discloses can throw the screen through cell-phone with screen or DLNA, with the audio and video signal direct projection local screen display on the cell-phone. The mobile phone projects the audio and video signals on the mobile phone to the screen of the mobile phone through a multi-screen interaction option, or the mobile phone and the network of the mobile phone are connected to the same WIFI network, and the audio and video signals on the mobile phone are projected to the screen of the mobile phone through a DLNA screen projection option in a mobile phone video APP. The utility model discloses support H.264 to decode, AVS + decode, AVS decodes, MPEG decodes. Supports multiple audio formats such as MP3, AC-3, WMA, AAC, DTS and the like. The system supports the broadcasting and television digital television management system and can receive and watch local broadcasting and television encrypted television programs.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a DTMB high definition digital television all-in-one with wiFi function which characterized in that: the device comprises a main control module, and also comprises an audio and video receiving module, a display module, a power amplifier output module and a WiFi module which are electrically connected with the main control module;

the audio and video receiving module comprises a decoding circuit, the decoding circuit is connected with the main control module, the audio and video receiving module also comprises a tuning circuit and a CA decryption circuit which are connected with the decoding circuit, and the other end of the tuning circuit is connected with an external antenna ANT 1;

the display module comprises an LVDS display screen J10F, and further comprises a first input circuit, a second input circuit and a driving circuit which are connected with the LVDS display screen J10F, wherein the input ends of the first input circuit, the second input circuit and the driving circuit are connected with the main control module and the power supply end;

the WiFi module comprises a wireless chip U12, the input end of a wireless chip U12 is connected with the main control module and the power supply end, and the output end of the wireless chip U12 is connected with an interface J3G 1.

2. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 1, wherein: the main control module comprises a main chip U13, and the main chip U13 comprises three parts, namely U13A, U13B and U13C.

3. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 2, wherein: the pin 5 of the wireless chip U12 is a power supply input end, the pin 5 of the chip U12 is connected in series with a resistor R15F, the other end of the resistor R15F is connected with a power supply end, a capacitor C9F and a capacitor E1F are further connected in parallel between the pin 5 of the wireless chip U12 and the resistor R15F, the pin 6 and the pin 7 of the wireless chip U12 are respectively connected with the pin B2 and the pin B1 of the main chip U13, the pin of the wireless chip U12 is connected in series with an inductor L0402, and the other end of the inductor L0402 is connected with the interface J3G 1.

4. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 2, wherein: the power amplifier output module comprises a power amplifier chip U3F, a power amplifier input circuit and an interface J2, wherein the input end of the power amplifier input circuit is connected with the main chip U13 and the power supply end, the output end of the power amplifier input circuit is connected with the interface J2, and the interface J2 is a buzzer.

5. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 2, wherein: the audio and video receiving module comprises a demodulation circuit, the demodulation circuit comprises a tuning chip U1T, the tuning chip U1T is connected with the main chip U13, and the tuning chip U1T is further connected with an external antenna ANT 1.

6. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 2, wherein: the main chip U13 is also connected with a CA encryption module, a USB interface module, a data debugging interface module, a remote control interface module, a plug-in storage module, a key function control interface module, a high-definition input interface module, an external video/audio input interface module and a key sampling voltage module.

7. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 6, wherein: the CA encryption module comprises an encryption interface CON2, a data connection port of the encryption interface CON2 is connected with the main chip U13, and a power supply input end of the encryption interface CON2 is connected with a power supply end.

8. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 6, wherein: the USB interface module comprises an interface J1F, a power supply pin 1 of the interface J1F is connected with a 5V power supply end, a pin 2 and a pin 3 of the interface J1F are connected with a main chip U13, the high-definition input interface module comprises an interface J13F, and further comprises a chip D4F and a chip D3F which are connected with the interface J13F, and the output ends of the chip D4F and the chip D3F are connected with the main chip U13.

9. The DTMB high-definition digital television all-in-one machine with WiFi function of claim 2, wherein: the main chip U13 still is connected with power module, power module includes 5V input circuit, 3.3V input circuit, 1.8V input circuit and 1.2V input circuit, external power source is connected to 5V input circuit, 3.3V input circuit, 1.8V input circuit and 1.2V input circuit's input, internal circuit module is connected to 5V input circuit, 3.3V input circuit, 1.8V input circuit and 1.2V input circuit's output.