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
- interface circuit
- television
- circuit
- signal processing
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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 TV set circuit specifically realizes increasing the circuit solution of USB interface at the TV set.
Background
With the development of network multimedia and digital television technologies, information transmission and sharing with digital information flow as a core has become an important component of office and daily life facilities.
The existing computer terminals are basically equipped with standard USB interfaces, so that data transmission can be conveniently and quickly realized, and the data exchange amount is large. Since the digital tv has become the mainstream of the development of tv technology at present, the digital tv with the help of network technology has become the display terminal in the network device, which not only can be used to watch tv programs, but also has more functions to provide network information and function services. However, the USB interface, which is a standard interface for network information transmission, has not been applied to the tv, so the network technology based on the USB interface standard has not been applied to the tv, and the function of the digital tv or the digital-compatible tv has still remained a disadvantage.
Therefore, adding a USB interface and an application circuit to a conventional television is a key technical issue for enhancing the functions and realizing the mutual communication between the digital device with the USB interface and the television.
Disclosure of Invention
Television USB interface circuit, aim at solving above-mentioned problem and provide the solution that has USB interface and interface realization circuit. In particular, the amount of the solvent to be used,
television USB interface circuit, mainly including USB interface, signal processing chip and voltage protection circuit.
The data end of the USB interface couples the data signals to the data input end of the signal processing chip after respectively passing through the resistor, thereby completing data decoding, format conversion and storage in the signal processing chip.
The voltage protection circuit mainly comprises a single/double-circuit power supply driving chip and is mainly used for providing normal working voltage for external USB equipment through a USB interface.
Television USB interface circuit, realized the intercommunication of other digital equipment and televisions, make external information can show, broadcast and save and can carry the external equipment with the information that the television was caught on the television. Meanwhile, the television can be upgraded through the USB interface. The function of the television is enhanced, and the display of the data signals on a large-screen high-quality display device is realized.
Drawings
FIG. 1 is a schematic diagram of the circuit structure of the USB interface of the television set;
fig. 2 is a process flow block diagram of the circuit.
Detailed Description
Example 1, the following detailed description will be made with reference to fig. 1 and 2.
As shown in fig. 2, after data is input from the USB interface, the USB interface circuit of the digital television or the digital compatible television sends the data to the signal conversion module for processing by the signal reading module, and can store the data in the RAM and the FLASH memory.
The USB interface circuit is mainly used for finishing processing operations of decoding, format conversion, storage and the like of input data in the signal conversion module and respectively outputting image and sound signals to the rear-end image display module and the sound playing module.
As shown in fig. 1, the USB interface circuit of the television mainly includes a USB interface, a signal processing chip, and a voltage protection circuit. Wherein,
the data terminals USDAT0-, USDAT0+, USDAT 1-USDAT 1+ of the USB interface are respectively coupled by resistors RB51, RB52, RB53 and RB54, and then connected to the data input terminals USDAT0-, USDAT0+, USDAT 1-USDAT 1+ of the signal processing chip X226, so that further processing such as data decoding, format conversion and storage can be carried out in the signal processing chip X226.
The voltage protection circuit mainly comprises a single/double-circuit power supply driving chip NB11, which has an output load detection function and is mainly used for providing normal working voltage for external USB equipment through a USB interface.
The voltage output end pins 6 and 8 of the NB11 respectively output voltages, and are connected with CB50 and FB01, and 2 POWER pins POWER1 and POWER2 of the USB interface after CB51 and FB02 are connected. The 2 USB ports can provide stable operating voltage from NB11 when external USB devices are plugged into the USB ports simultaneously or individually.
The capacitors CB48 and CB49 respectively play a role in filtering.
The control end of NB11 is connected with RB48 and then grounded, and RB48 ensures that NB11 is in a working state.
The FLAG pin at the FLAG end of NB11 is connected with the operating voltage +3.3V through pull-up resistor RB47, and is connected with the OVERCUR pin of signal processing chip X226.
Diodes VDB01, VDB02, VDB03, VDB04, VDB05, VDB06, VDB07, and VDB08 form a diode protection network that protects the USB device and the connected processing chip from damage by too low or too high voltages.
FB01 and FB02 play a role in filtering between the internal ground and the external ground, and prevent the external ground from interfering with signals.
RB55, RB56, RB57, RB57, VDB01, VDB02, VDB03, VDB04, VDB05, VDB06, VDB07 and VDB08 play a role in signal protection, so that the signal amplitude is in a normal range to avoid damaging a processing chip and external equipment, and CB52, CB53, CB54 and CB55 play a role in filtering to ensure that signals are complete and clean.
Claims (6)
1. A television USB interface circuit is characterized in that: the circuit mainly comprises a USB interface, a signal processing chip and a voltage protection circuit.
2. The television USB interface circuit of claim 1, wherein: and the data ends of the USB interfaces are respectively connected in series through resistors and then are connected to the data input end of the signal processing chip.
3. The television USB interface circuit of claim 2, wherein: the voltage protection circuit mainly comprises a single/double power supply driving chip.
4. The television USB interface circuit of claim 3, wherein: and voltage output end pins (6) and (8) of the single/double POWER supply driving chip NB11 are respectively connected with CB50, FB01, CB51, FB02 and 2 POWER supply pins (POWER1) and POWER2) of the USB interface.
5. The television USB interface circuit of claim 4, wherein: and the control end of the single/double power supply driving chip NB11 is grounded after being connected with the RB 48.
6. The television USB interface circuit of claim 5, wherein: the FLAG end (FLAG) of the single/double power supply driving chip NB11 is connected to the operating voltage +3.3V through a pull-up resistor RB47, and is connected to an (overvoltage) pin of the signal processing chip X226.
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 |