CN2674791Y - USB interface circuit for TV set - Google Patents
USB interface circuit for TV set Download PDFInfo
- Publication number
- CN2674791Y CN2674791Y CN 200420038539 CN200420038539U CN2674791Y CN 2674791 Y CN2674791 Y CN 2674791Y CN 200420038539 CN200420038539 CN 200420038539 CN 200420038539 U CN200420038539 U CN 200420038539U CN 2674791 Y CN2674791 Y CN 2674791Y
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- usb interface
- television set
- signal processing
- processing chip
- usb
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Abstract
The utility model discloses a USB interface circuit for TV set, mainly comprising a USB interface, a signal processing chip and a voltage protection circuit. The data end of the USB interface makes a data signal be connected to the data input end of the signal processing chip after the data signal is respectively coupled by a resistor, so that the signal processing chip accomplishes the data decoding, format conversion and storage. The USB interface circuit for the TV set realizes the mutual communication of other digital devices and the TV set, makes external information be displayed, played and stored on the TV set and is able to convey the information collected by the TV set to an external device.
Description
Technical field
The utility model relates to a kind of TV set circuit, is implemented in the circuit solution that television set increases USB interface specifically.
Background technology
Along with the development of network multimedia and digital television techniques, be the information transmission of core and share the important component part that has become office and daily life facility at present with digital information stream.
Existing terminal all has been equipped with the USB interface of standard basically, can realize data passes quickly and easily like this, and the exchanges data amount is bigger.Because Digital Television has become the development main flow of television technologies at present, become display terminal in the network equipment by means of the digital television of network technology, not only can be used to TV reception but also more function provides the network information and function service.But, be not applied to as yet on the television set as the standard interface-USB interface of network information transmission, therefore the network technology based on standard usb interface is not applied in television set as yet, and the function of Digital Television or digital compatible tv also leaves shortcoming.
Therefore, in existing television set, increase USB interface and application circuit, be enhancement function, also be to realize having the digital device of USB interface and the key technology problem of the mutual communication of television set.
Summary of the invention
Television set usb circuit described in the utility model is intended to address the above problem and provides the solution that USB interface and interface are realized circuit.Particularly,
Television set usb circuit described in the utility model mainly includes USB interface, signal processing chip and voltage protection circuit.
The data terminal of USB interface is connected to the data input pin of signal processing chip respectively with data-signal after the resistance coupling, thereby finishes data decode, format conversion and storage in signal processing chip.
Voltage protection circuit mainly includes list/double loop power supply chip for driving, and it mainly acts on is normal operating voltage to be provided for external USB equipment by USB interface.
Television set usb circuit described in the utility model has been realized the mutual communication of other digital device and television set, make external information on television set, be shown, play and preserve and the information conveyance that television set can be caught to external equipment.Simultaneously, can upgrade to television set by USB interface.Strengthen television function, realized the demonstration of data-signal on large-screen, high-quality display equipment.
Description of drawings
Fig. 1 is described television set usb circuit structural representation;
Fig. 2 is the process flow block diagram of described circuit.
Embodiment
Embodiment 1, in conjunction with Fig. 1 and Fig. 2 embodiment done following detailed description.
As shown in Figure 2, the usb circuit of described Digital Television or digital compatible tv after USB interface input data, is delivered to signal conversion module by signal reading module with data and is handled, and can store in RAM and FLASH memory.
Described usb circuit mainly is that operation is handled in the decoding, format conversion, storage etc. of finishing the input data in signal conversion module, and respectively output image and voice signal to rear end image display and sound playing module.
As shown in Figure 1, described television set usb circuit mainly includes USB interface, signal processing chip and voltage protection circuit.Wherein,
Data terminal USDAT0-, the USDAT0+ of USB interface, USDAT1-, USDAT1+, with data-signal respectively after resistance R B51, RB52, RB53, RB54 coupling, be connected to data input pin USDAT0-, USDAT0+, USDAT1-, the USDAT1+ of signal processing chip X226, further handle thereby in signal processing chip X226, carry out data decode, format conversion and storage etc.
Voltage protection circuit mainly includes list/double loop power supply chip for driving NB11, and it has the output loading measuring ability, and main effect is normal working voltage to be provided for external USB equipment by USB interface.
The voltage output end pin 6 of NB11 and 8 is output voltages respectively, and connect 2 supply pin POWER1, POWER2 that are connected USB interface behind CB50 and FB01 and CB51 and the FB02.Above-mentioned 2 USB port can provide stable operating voltage by NB11 as the external USB equipment while or after inserting USB interface separately.
Capacitor C B48, CB49 play filter action respectively.
Ground connection behind the NB11 control end connection RB48, RB48 plays and guarantees that NB11 is in running order.
The flag terminal FLAG pin of NB11 connects operating voltage+3.3V by pull-up resistor RB47, is connected with the OVERCUR pin of signal processing chip X226 simultaneously.
Diode VDB01, VDB02, VDB03, VDB04, VDB05, VDB06, VDB07 and VDB08 form the diode protection network, and protection USB device and the process chip that is connected damaged it to prevent low or too high voltage.
Filter action in FB01 and FB02 rise between the other places prevents interference signal externally.
RB55, RB56, RB57, RB57, VDB01, VDB02, VDB03, VDB04, VDB05, VDB06, VDB07, VDB08 play the signal protection effect; make signal amplitude in normal range (NR); in order to avoid damage process chip and external equipment; CB52, CB53, CB54, CB55 strobe, and guarantee that signal integrity is clean.
Claims (6)
1, a kind of television set usb circuit, it is characterized in that: described circuit mainly includes USB interface, signal processing chip and voltage protection circuit.
2, television set usb circuit according to claim 1 is characterized in that: described USB interface data terminal is connected to the data input pin of signal processing chip respectively behind the resistance polyphone.
3, television set usb circuit according to claim 2 is characterized in that: voltage protection circuit mainly includes list/double loop power supply chip for driving.
4, television set usb circuit according to claim 3 is characterized in that: voltage output end pin (6) and (8) of described list/double loop power supply chip for driving NB11 are connected 2 supply pins (POWER1), (POWER2) that is connected USB interface behind CB50 and FB01 and CB51 and the FB02 respectively.
5, television set usb circuit according to claim 4 is characterized in that: ground connection behind described list/double loop power supply chip for driving NB11 control end connection RB48.
6, television set usb circuit according to claim 5, it is characterized in that: the flag terminal (FLAG) of described list/double loop power supply chip for driving NB11, connect operating voltage+3.3V by pull-up resistor RB47, be connected with (OVERCUR) pin of signal processing chip X226 simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038539 CN2674791Y (en) | 2004-02-13 | 2004-02-13 | USB interface circuit for TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038539 CN2674791Y (en) | 2004-02-13 | 2004-02-13 | USB interface circuit for TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2674791Y true CN2674791Y (en) | 2005-01-26 |
Family
ID=34484027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420038539 Expired - Fee Related CN2674791Y (en) | 2004-02-13 | 2004-02-13 | USB interface circuit for TV set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2674791Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412838C (en) * | 2006-09-14 | 2008-08-20 | 深圳创维－Rgb电子有限公司 | Apparatus for updating content of television internal USB storing equipment |
| CN101212631B (en) * | 2007-01-25 | 2010-11-17 | 深圳创维－Rgb电子有限公司 | Complex USB device applicable to TV set |
| CN101325695B (en) * | 2007-06-15 | 2011-09-28 | 康佳集团股份有限公司 | Liquid crystal television with USB-OTG function |
-
2004
- 2004-02-13 CN CN 200420038539 patent/CN2674791Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412838C (en) * | 2006-09-14 | 2008-08-20 | 深圳创维－Rgb电子有限公司 | Apparatus for updating content of television internal USB storing equipment |
| CN101212631B (en) * | 2007-01-25 | 2010-11-17 | 深圳创维－Rgb电子有限公司 | Complex USB device applicable to TV set |
| CN101325695B (en) * | 2007-06-15 | 2011-09-28 | 康佳集团股份有限公司 | Liquid crystal television with USB-OTG function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |