CN211606658U - VGA interface circuit compatible with transmitting Tuner signal, television mainboard and television - Google Patents
VGA interface circuit compatible with transmitting Tuner signal, television mainboard and television Download PDFInfo
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- CN211606658U CN211606658U CN202020617832.9U CN202020617832U CN211606658U CN 211606658 U CN211606658 U CN 211606658U CN 202020617832 U CN202020617832 U CN 202020617832U CN 211606658 U CN211606658 U CN 211606658U
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Abstract
The utility model discloses a VGA interface circuit, TV mainboard and TV set of compatible transmission Tuner signal is connected with external Tuner module, VGA interface circuit includes: the main control module is used for receiving a user instruction, switching the Tuner mode and the VGA mode according to the user instruction and sending a control instruction; and the VGA circuit is connected with the main control module and the external Tuner module and is used for transmitting Tuner signals or VGA signals according to the control instruction. The utility model discloses a host system receives user command and controls the VGA pin and realize Tuner signal transmission or VGA signal transmission, realizes VGA interface compatible transmission Tuner signal.
Description
Technical Field
The utility model relates to a TV set field, in particular to VGA interface circuit, TV mainboard and TV set of compatible transmission Tuner signal.
Background
The existing VGA signal and the separated external Tuner module signal of the television are transmitted through two independent interfaces, the number of the interfaces on the television is more and more due to the continuous increase of the functions of the existing television, the miniaturization requirement is higher and higher, and the television is required to be light and thin. Under the premise, the realization of VGA signal transmission and Tuner signal transmission through two interfaces especially occupies the physical space of a television.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide a VGA interface circuit, a television main board and a television set that are compatible with the transmission Tuner signal, which control the VGA pin to realize Tuner signal transmission or VGA signal transmission through the main control module receiving user command, so as to realize the Tuner signal compatible with the VGA interface.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a VGA interface circuit compatible with transmission Tuner signals is connected with an external Tuner module, and comprises:
the main control module is used for receiving a user instruction, switching the Tuner mode and the VGA mode according to the user instruction and sending a control instruction;
and the VGA circuit is used for transmitting a Tuner signal or a VGA signal according to the control instruction.
The VGA circuit includes: the VGA interface is used for transmitting Tuner signals or VGA signals according to the control instructions, and the first diode is used for preventing current backflushing, the VGA interface is connected with the output end of the first diode and the external Tuner module, and the input end of the first diode is connected with a power supply.
The VGA interface comprises a VGA pin unit, a Tuner pin unit and a shared pin unit; the VGA pin unit, the Tuner pin unit and the shared pin unit are all connected with an external Tuner module.
The VGA pin unit includes:
the first pin is connected with the external Tuner module and used for transmitting VGA red primary color analog signals;
the second pin is connected with the external Tuner module and is used for transmitting VGA green primary color analog signals;
and the third pin is connected with the external Tuner module and is used for transmitting VGA blue primary color analog signals.
The Tuner pin unit includes:
the fourth pin is connected with the external Tuner module and is used for transmitting Tuner first intermediate frequency differential signals;
the fifth pin is connected with the external Tuner module and used for transmitting a second intermediate frequency differential signal;
the ninth pin is connected with the output end of the first diode and the external Tuner module and used for supplying power when Tuner signals are transmitted;
and the eleventh pin is connected with the external Tuner module and used for transmitting the automatic gain control signal.
The common pin unit includes:
a twelfth pin connected with the external Tuner module and used for transmitting the data signal of the external Tuner module in Tuner mode or transmitting the data signal of EDID in VGA mode;
and the fifteenth pin is connected with the external Tuner module and is used for transmitting the clock signal of the external Tuner module when in Tuner mode or transmitting the clock signal of EDID in VGA when in VGA mode.
The VGA pin unit further comprises a sixth pin, a seventh pin and an eighth pin, wherein the sixth pin, the seventh pin and the eighth pin are grounding pins of the first pin, the second pin and the third pin respectively, and the sixth pin, the seventh pin and the eighth pin are all connected with an external Tuner module.
The VGA interface also comprises a tenth pin, a thirteenth pin, a fourteenth pin, a sixteenth pin and a seventeenth pin, wherein the tenth pin is a digital grounding pin, the thirteenth pin is a line synchronization pin, and the fourteenth pin is a field synchronization pin; the sixteenth pin and the seventeenth pin are both grounding pins of the VGA interface;
the tenth foot, the thirteenth foot, the fourteenth foot, the sixteenth foot and the seventeenth foot are all connected with an external Tuner module.
A VGA interface circuit compatible with transmitting Tuner signals is welded on the television mainboard.
A television comprises a television body and the television main board arranged in the television body.
Compared with the prior art, the utility model provides a VGA interface circuit, TV mainboard and TV set of compatible transmission Tuner signal, with external Tuner module connection, VGA interface circuit includes: the main control module is used for receiving a user instruction, switching the Tuner mode and the VGA mode according to the user instruction and sending a control instruction; and the VGA circuit is connected with the main control module and the external Tuner module and is used for transmitting Tuner signals or VGA signals according to the control instruction. The utility model discloses a host system receives user command and controls the VGA pin and realize Tuner signal transmission or VGA signal transmission, realizes VGA interface compatible transmission Tuner signal.
Drawings
Fig. 1 is a functional block diagram of a VGA interface circuit compatible with transmitting Tuner signals provided by the present invention;
fig. 2 is a circuit diagram of a VGA interface circuit compatible with transmitting Tuner signals provided by the present invention.
Detailed Description
In view of the problem among the prior art, the utility model provides a VGA interface circuit, TV mainboard and TV set of compatible transmission Tuner signal, receive user command through host system and control the VGA pin and realize Tuner signal transmission or VGA signal transmission, realize the compatible transmission Tuner signal of VGA interface.
The present invention is described in more detail in order to facilitate the explanation of the technical idea, the technical problem solved, the technical features of the technical solution, and the technical effects brought by the present invention. The description of the embodiments is not intended to limit the scope of the present invention. Further, the technical features of the embodiments described below may be combined with each other as long as they do not conflict with each other.
In view of the problem that the tv in the prior art uses two independent interfaces to realize VGA signal transmission and Tuner signal transmission, and therefore occupies the physical space of the tv, please refer to fig. 1, the utility model provides a VGA interface (VGA-W) circuit of compatible transmission Tuner signal, is connected with external Tuner module (300), specifically, VGA interface (VGA-W) circuit of compatible transmission Tuner signal includes: the main control module (100) is used for receiving a user instruction, switching between a Tuner mode and a VGA mode according to the user instruction and sending a control instruction; and the VGA circuit (200) is connected with the main control module (100) and the external Tuner module (300) and is used for transmitting Tuner signals or VGA signals according to the control instruction.
When the signal transmission mode is required to be changed, the operation interface is controlled to enter through a remote controller or an APP, a virtual control switch is arranged on the operation interface, and switching between a Tuner mode and a VGA mode is achieved through the virtual control switch. Specifically, the control is performed by the user, and when the user needs to watch the television (namely, needs to use the TV function), the virtual control switch is switched to the Tuner mode; when in Tuner mode, the main control module (100) generates a first control signal to the VGA circuit (200) according to a user instruction, and controls the VGA circuit (200) to transmit Tuner signals. When the user only needs to display images (for example, playing games through a television), the VGA mode is switched through the virtual control switch; in the VGA mode, the main control module (100) generates a second control signal to the VGA circuit (200) according to an instruction of a user, and controls the VGA circuit (200) to transmit VGA signals. In the embodiment, the main control module (100) receives a user instruction to switch the transmission mode, and controls the VGA circuit (200) to realize Tuner signal transmission or VGA signal transmission, so that the aim of VGA interface (VGA-W) compatible transmission Tuner signal is fulfilled. In particular, the main control module (100) is a System On Chip (SOC).
Specifically, referring to fig. 2, the VGA circuit (200) includes a VGA interface (VGA-W) and a first diode D1, and when in use, the VGA interface (VGA-W) is connected to an external Tuner module (300), and a power supply (Tuner-VCC) is connected from the first diode D1 to supply power to the VGA interface (VGA-W) and prevent current from backflushing. And the VGA interface (VGA-W) transmits a Tuner signal or a VGA signal according to the control instruction. The VGA interface (VGA-W) is connected with the output end of the first diode D1 and the external Tuner module (300), and the input end of the first diode D1 is connected with a power supply (TUNER-VCC).
Further, with reference to fig. 2, the VGA interface (VGA-W) includes a VGA pin unit, a Tuner pin unit, and a common pin unit; the VGA pin unit, the Tuner pin unit and the shared pin unit are all connected with an external Tuner module (300). In the embodiment, the VGA interface (VGA-W) is divided into a plurality of units on the basis of the original VGA pin, each unit is controlled to work through the main control module (100), and the Tuner mode or the VGA module is switched, so that VGA signals and Tuner signals are compatibly transmitted through the VGA interface (VGA-W).
Specifically, with continued reference to fig. 2, the VGA pin unit includes: the device comprises a first pin, a second pin and a third pin, wherein the first pin, the second pin and the third pin are pins of VGA original definition and are all connected with an external Tuner module (300). The first pin is used for transmitting VGA red base color analog signals (VGA-R), the second pin is used for transmitting VGA green base color analog signals (VGA-G), and the third pin is used for transmitting VGA blue base color analog signals (VGA-B). In addition, the VGA pin unit further comprises a sixth pin, a seventh pin and an eighth pin, wherein the sixth pin, the seventh pin and the eighth pin are grounding pins of the first pin, the second pin and the third pin respectively. Namely, the sixth pin is a red primary color ground pin, the seventh pin is a green primary color ground pin, and the eighth pin is a blue primary color ground pin. The sixth foot, the seventh foot and the eighth foot are all connected with an external Tuner module (300). In a VGA mode, the main control module (100) realizes VGA-RGB signal transmission through the first pin, the second pin and the third pin.
Specifically, with continued reference to fig. 2, the Tuner pin unit includes: the device comprises a fourth pin, a fifth pin, a ninth pin and an eleventh pin, wherein the fourth pin, the fifth pin, the ninth pin and the eleventh pin are reserved pins of an original VGA interface (VGA-W); -transmitting a first intermediate frequency differential signal (Tuner-IFP) of Tuner through said fourth pin, -transmitting a second intermediate frequency differential signal (Tuner-IFN) through said fifth pin, -powering on the transmission of Tuner signal through said ninth pin, -transmitting an automatic gain control signal (Tuner-IF-AGC) of said external Tuner module (300) through said eleventh pin, in Tuner mode. The fourth pin, the fifth pin, the ninth pin and the eleventh pin are all connected with an external Tuner module (300), and the ninth pin is also connected with the output end of a first diode D1. The present embodiment enables the fourth, fifth, ninth, and eleventh pins of the VGA interface (VGA-W) to transmit the intermediate frequency differential signal pair of Tuner (i.e., the first intermediate frequency differential signal and the second intermediate frequency differential signal) and the automatic gain control signal (Tuner-IF-AGC) by reconfiguring the VGA reserved pin.
Further, with reference to fig. 2, the common pin unit includes a twelfth pin and a fifteenth pin, where the twelfth pin and the fifteenth pin are pins defined and used for VGA signal transmission originally in a VGA interface (VGA-W), and in this embodiment, the twelfth pin and the fifteenth pin are multiplexed, so that the twelfth pin transmits a data signal (Tuner-SDA) externally connected to the Tuner module (300) in the Tuner mode, and transmits a data signal (VGA-SDA) EDID in the VGA mode; the fifteenth leg is caused to transmit a clock signal (TUNER-SCL) external to the Tuner module (300) in Tuner mode and to transmit a clock signal (VGA-SCL) of EDID in VGA mode. The twelfth leg and the fifteenth leg are both connected with an external Tuner module (300).
In addition, please continue to refer to fig. 2, the VGA interface (VGA-W) further includes a tenth pin, a thirteenth pin, a fourteenth pin, a sixteenth pin and a seventeenth pin, wherein the tenth pin is a digital ground pin, the thirteenth pin is a line synchronization pin (VGA-HSYNC), and the fourteenth pin is a field synchronization pin (VGA-VSYNC); the sixteenth pin and the seventeenth pin are both grounding pins of the VGA interface (VGA-W); the tenth foot, the thirteenth foot, the fourteenth foot, the sixteenth foot and the seventeenth foot are all connected with an external Tuner module (300). Since the tenth pin, the thirteenth pin, the fourteenth pin, the sixteenth pin and the seventeenth pin are defined by the original VGA pins, they will not be described in detail herein.
In summary, in this embodiment, the pin of the VGA interface (VGA-W) is redefined, so that the VGA interface (VGA-W) can compatibly transmit the VGA signal and the Tuner signal, thereby reducing the increase of the number of the tv motherboard interfaces, saving the arrangement space of the tv motherboard interfaces, and saving the hardware cost.
VGA interface circuit based on foretell compatible transmission Tuner signal, the utility model discloses still provide a TV mainboard, the welding has as above on the TV mainboard the VGA interface circuit of compatible transmission Tuner signal. The SOC chip is arranged on the mainboard and is connected with the VGA interface circuit compatible with the transmission Tuner signal, so that the purpose of the VGA interface compatible with the transmission Tuner signal is achieved. Other devices in the TV mainboard are consistent with the prior art, the utility model discloses do not improve it. Since the VGA interface circuit compatible with transmitting Tuner signals has been described in detail above, it will not be described in detail here.
Based on foretell TV mainboard, the utility model discloses still provide a TV set, including the TV set body, and set up the above in the TV set body the TV mainboard. Other structures in the television are consistent with the prior art, and the utility model discloses do not improve it. Since the television main board has been described in detail above, it will not be described in detail here.
To sum up, the utility model provides a VGA interface circuit, TV mainboard and TV set of compatible transmission Tuner signal is connected with external Tuner module, VGA interface circuit includes: the main control module is used for receiving a user instruction, switching the Tuner mode and the VGA mode according to the user instruction and sending a control instruction; and the VGA circuit is connected with the main control module and the external Tuner module and is used for transmitting Tuner signals or VGA signals according to the control instruction. The utility model discloses a host system receives user command and controls the VGA pin and realize Tuner signal transmission or VGA signal transmission, realizes VGA interface compatible transmission Tuner signal.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (10)
1. A VGA interface circuit compatible with transmitting Tuner signals is connected with an external Tuner module, and is characterized in that the VGA interface circuit comprises:
the main control module is used for receiving a user instruction, switching a Tuner mode and a VGA mode according to the user instruction and sending a control instruction;
and the VGA circuit is connected with the main control module and the external Tuner module and is used for transmitting Tuner signals or VGA signals according to the control instruction.
2. The VGA interface circuit of claim 1, wherein the VGA circuit comprises: the VGA interface is used for transmitting Tuner signals or VGA signals according to the control instructions, and the first diode is used for preventing current backflushing, the VGA interface is connected with the output end of the first diode and the external Tuner module, and the input end of the first diode is connected with a power supply.
3. The VGA interface circuit compatible with a transmission Tuner signal of claim 2, wherein the VGA interface comprises a VGA pin unit, a Tuner pin unit and a shared pin unit; the VGA pin unit, the Tuner pin unit and the shared pin unit are all connected with an external Tuner module.
4. The VGA interface circuit compatible with a transmission Tuner signal of claim 3, wherein the VGA pin unit comprises:
the first pin is connected with the external Tuner module and used for transmitting VGA red primary color analog signals;
the second pin is connected with the external Tuner module and is used for transmitting VGA green primary color analog signals;
and the third pin is connected with the external Tuner module and is used for transmitting VGA blue primary color analog signals.
5. The VGA interface circuit compatible with a transmission Tuner signal of claim 3, wherein the Tuner pin unit comprises:
the fourth pin is connected with the external Tuner module and used for transmitting the first intermediate frequency differential signal;
the fifth pin is connected with the external Tuner module and used for transmitting a second intermediate frequency differential signal;
the ninth pin is connected with the output end of the first diode and the external Tuner module and used for supplying power when Tuner signals are transmitted;
and the eleventh pin is connected with the external Tuner module and used for transmitting the automatic gain control signal.
6. The VGA interface circuit compatible with a transmission Tuner signal of claim 3, wherein the common pin unit comprises:
a twelfth pin connected with the external Tuner module and used for transmitting the data signal of the external Tuner module in Tuner mode or transmitting the data signal of EDID in VGA mode;
and the fifteenth pin is connected with the external Tuner module and is used for transmitting the clock signal of the external Tuner module when in Tuner mode or transmitting the clock signal of EDID in VGA when in VGA mode.
7. The VGA interface circuit compatible with transmitting Tuner signals according to any one of claims 4 to 6, wherein the VGA pin unit further comprises a sixth pin, a seventh pin and an eighth pin, the sixth pin, the seventh pin and the eighth pin are grounding pins of the first pin, the second pin and the third pin respectively, and the sixth pin, the seventh pin and the eighth pin are all connected with an external Tuner module.
8. The VGA interface circuit compatible with a transmission Tuner signal of claim 7, wherein the VGA interface further comprises a tenth pin, a thirteenth pin, a fourteenth pin, a sixteenth pin and a seventeenth pin, wherein the tenth pin is a digital ground pin, the thirteenth pin is a line synchronization pin, and the fourteenth pin is a field synchronization pin; the sixteenth pin and the seventeenth pin are both grounding pins of the VGA interface;
the tenth foot, the thirteenth foot, the fourteenth foot, the sixteenth foot and the seventeenth foot are all connected with an external Tuner module.
9. A television main board, wherein a VGA interface circuit compatible with transmitting Tuner signals according to any one of claims 1 to 8 is soldered on the television main board.
10. A television set comprising a television set body, and the television main board of claim 9 provided in the television set body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020617832.9U CN211606658U (en) | 2020-04-22 | 2020-04-22 | VGA interface circuit compatible with transmitting Tuner signal, television mainboard and television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020617832.9U CN211606658U (en) | 2020-04-22 | 2020-04-22 | VGA interface circuit compatible with transmitting Tuner signal, television mainboard and television |
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| Publication Number | Publication Date |
|---|---|
| CN211606658U true CN211606658U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020617832.9U Active CN211606658U (en) | 2020-04-22 | 2020-04-22 | VGA interface circuit compatible with transmitting Tuner signal, television mainboard and television |
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| CN (1) | CN211606658U (en) |
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- 2020-04-22 CN CN202020617832.9U patent/CN211606658U/en active Active
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