CN217883613U - Display screen data bidirectional transmission circuit and corresponding electronic equipment - Google Patents
Display screen data bidirectional transmission circuit and corresponding electronic equipment Download PDFInfo
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- CN217883613U CN217883613U CN202222332884.3U CN202222332884U CN217883613U CN 217883613 U CN217883613 U CN 217883613U CN 202222332884 U CN202222332884 U CN 202222332884U CN 217883613 U CN217883613 U CN 217883613U
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Abstract
The utility model provides a display screen data bidirectional transmission circuit, it includes little control chip, display screen chip, data communication module. The micro control chip comprises a first control pin for outputting a first data signal and a second control pin for receiving a second data signal. The display screen chip comprises a display control pin for receiving a first data signal and sending a second data signal. The data communication module comprises a first communication unit connected with a first control pin and a display control pin, and the display screen chip comprises a second communication unit connected with a second control pin and the display control pin. When the first communication unit is in the working state, the second communication unit is in the cut-off state. When the second communication unit is in the working state, the first communication unit is in the cut-off state. The display screen data bidirectional transmission circuit is applied to electronic equipment.
Description
Technical Field
The utility model relates to a circuit field, in particular to display screen data bidirectional transmission circuit.
Background
In modern society, the display screen is connected with the micro-processing chip through a serial SPI interface and a traditional standard SPI interface. However, if the SDA interface of the display panel is connected to the MOSI interface of the microprocessor chip, the SDA interface of the sub-display panel can only be used as an input, and can only receive data sent by the microprocessor chip, but cannot send data to the microprocessor chip. If the SDA interface of the display screen is connected to the MISO interface of the micro-processing chip, the sub-micro-processing chip can only read the data of the display screen but can not send the data to the display screen. Therefore, the technical problem that the data is difficult to be transmitted in two directions between the existing display screen and the microprocessor chip is solved.
Therefore, it is desirable to provide a bidirectional data transmission circuit for a display panel and a corresponding electronic device to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display screen data bidirectional transmission circuit and corresponding electronic equipment has effectively solved the technical problem that is difficult to bidirectional transmission data between current display screen and the micro-processing chip.
The utility model provides a display screen data bidirectional transmission circuit, it includes:
the micro-control chip comprises a first control pin for outputting a first data signal and a second control pin for receiving a second data signal;
the display screen chip comprises a display control pin for receiving the first data signal and sending the second data signal;
the data communication module comprises a first communication unit and a second communication unit, wherein the first communication unit is connected with the first control pin and the display control pin, and the second communication unit is connected with the second control pin and the display control pin;
when the first communication unit is in a working state, the second communication unit is in a cut-off state; and when the second communication unit is in a working state, the first communication unit is in a cut-off state.
Further, the first communication unit is a unidirectional conducting unit, and the first data signal output by the first control pin is transmitted to the display control pin through the first communication unit.
Further, the first communication unit comprises a first diode, the anode of the first diode is connected with the first control pin, and the cathode of the first diode is connected with the display control pin.
Further, the second communication unit is a unidirectional conduction unit, and the second data signal output by the display control pin is transmitted to the second control pin through the second communication unit.
Further, the second communication unit includes a second diode, a cathode of the second diode is connected to the second control pin, and an anode of the second diode is connected to the display control pin.
Further, the micro control chip further comprises a control unit for controlling the first control pin and the second control pin, when the micro control chip sends data to the display screen chip, the control unit controls the second control pin to be in a high-resistance state, and the first control pin outputs a first data signal to the display control pin through the first communication unit.
Further, when the micro control chip reads the data of the display screen chip, the control unit controls the first control pin to be in a low level state, and the display control pin outputs a second data signal to the second control pin through the second communication unit.
Further, the display screen data bidirectional transmission circuit further comprises a power supply module, the power supply module is connected with the micro control chip, the micro control chip further comprises a power supply pin, the display screen chip comprises a power supply pin, the power supply pin is connected with the power supply pin, and the power supply module is used for outputting working voltage to the micro control chip and the display screen chip.
An electronic device comprises any one of the display screen data bidirectional transmission circuits.
The utility model discloses compare in prior art, its beneficial effect is: the utility model provides a display screen data bidirectional transmission circuit, this display screen data bidirectional transmission circuit include little control chip, display screen chip, data communication module, and this data communication module is provided with first communication unit and second communication unit. When the first communication unit is in a working state, the micro control chip outputs a first data signal through the first control pin. The first data signal can be transmitted to a display control pin of the display screen chip through the first communication unit, and at the moment, the second communication unit is in a cut-off state. And when the second communication unit is in a working state, the display control pin of the display screen chip outputs a second data signal. The second data signal can be transmitted to a second control pin of the micro control chip through the second communication unit, and the first communication unit is in a cut-off state at the moment. Therefore, the data signals can be transmitted between the microprocessing unit and the display screen in a two-way mode. The display screen data bidirectional transmission circuit can optimize the data transmission mode between the microprocessing unit and the display screen, and effectively solves the technical problem that the data is difficult to be bidirectionally transmitted between the conventional display screen and the microprocessing chip. Moreover, the circuit structure of the display screen data bidirectional transmission circuit is simple, and the requirement on hardware technology is not high. The user designs the circuit in the electronic equipment, so that the production cost of the electronic equipment can be effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly described below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.
Fig. 1 is a block diagram of an embodiment of the display screen data bidirectional transmission circuit of the present invention.
Fig. 2 is a circuit diagram of an embodiment of the display screen data bidirectional transmission circuit of the present invention.
In the figure, 10, a display screen data bidirectional transmission circuit; 11. a micro control chip; 12. a display screen chip; 13. a data communication module; 131. a first communication unit; 132. a second communication unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the present invention, the directional terms mentioned in the following description, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", refer to the orientation of the drawings, and the directional terms are used for illustration and understanding of the present invention, but not for limiting the present invention.
The terms "first," "second," and the like in the terms of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor should they be construed as limiting in any way.
In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1 and fig. 2, the present invention provides a bidirectional data transmission circuit 10 for a display screen, wherein the bidirectional data transmission circuit 10 is applied to an electronic device. The display screen data bidirectional transmission circuit 10 comprises a micro control chip 11, a display screen chip 12 and a data communication module 13. The micro control chip 11 includes a first control pin LCD _ SDA _ OUT operable to output a first data signal. The micro control chip 11 includes a second control pin LCD _ SDA _ IN operable to receive a second data signal. The display chip 12 includes a display control pin SDAI/O that is operable to receive a first data signal and to transmit a second data signal. The data communication module 13 includes a first communication unit 131, and the first communication unit 131 connects the first control pin LCD _ SDA _ OUT and the display control pin SDAI/O. The data communication module 13 includes a second communication unit 132, and the second communication unit 132 is connected to the second control pin LCD _ SDA _ IN and the display control pin SDAI/O. When the first communication unit 131 is in the operating state, the second communication unit 132 is in the off state. When the second communication unit 132 is in the operating state, the first communication unit 131 is in the off state.
Referring to fig. 1 and 2, the first communication unit 131 is a unidirectional conducting unit, so that the first data signal output from the first control pin LCD _ SDA _ OUT is transmitted to the display control pin SDAI/O through the first communication unit 131. The first communication unit 131 includes a first diode D3, a positive electrode of the first diode D3 is connected to the first control pin LCD _ SDA _ OUT, and a negative electrode of the first diode D3 is connected to the display control pin SDAI/O. The second communication unit 132 is also a unidirectional conducting unit, so that the second data signal output from the display control pin SDAI/O is transmitted to the second control pin LCD _ SDA _ IN through the second communication unit 132. The second communication unit 132 includes a second diode D4, a cathode of the second diode D4 is connected to the second control pin LCD _ SDA _ IN, and an anode of the second diode D4 is connected to the display control pin SDAI/O.
Referring to fig. 1 and 2, the micro-control chip 11 further includes a control unit for controlling the first control pin LCD _ SDA _ OUT and the second control pin LCD _ SDA _ IN. When the micro control chip 11 sends data to the display screen chip 12, the control unit controls the second control pin LCD _ SDA _ IN to be IN a high impedance state, and the first control pin LCD _ SDA _ OUT outputs a first data signal to the display control pin SDAI/O through the first communication unit 131. When the micro control chip 11 reads the data of the display screen chip 12, the control unit controls the first control pin LCD _ SDA _ OUT to be IN a low level state, and the display control pin SDAI/O outputs a second data signal to the second control pin LCD _ SDA _ IN through the second communication unit 132.
Referring to fig. 1 and fig. 2, the display screen data bidirectional transmission circuit 10 further includes a power supply module, and the power supply module is connected to the micro control chip 11. The micro control chip 11 further comprises a power supply pin VCC _3V3, and the display screen chip 12 comprises a power supply pin 3V3. The power supply pin VCC _3V3 is connected with the power supply pin 3V3, and the power supply module is used for outputting working voltage to the micro control chip 11 and the display screen chip 12.
Referring to fig. 1 and 2, the micro control chip 11 further includes an LEDK pin, and the display screen chip 12 further includes an LEK pin, and the LEDK pin is connected to the LEK pin. The micro control chip 11 further includes a first signal feedback pin LCD _ TE, and the display screen chip 12 further includes a second signal feedback pin TE. The first signal feedback pin LCD _ TE is connected to the second signal feedback pin TE, so that when the display chip 12 receives the signal from the micro control chip 11, the display chip 12 can transmit the feedback signal to the first signal feedback pin LCD _ TE through the second signal feedback pin TE. The micro control chip 11 further includes a third control pin LCD _ WRX, and the display screen chip 12 further includes a fourth control pin WRX. The third control pin LCD _ WRX is connected to the fourth control pin WRX, and when the fourth control pin WRX is at a low level, a data signal transmitted between the display screen chip 12 and the micro control chip 11 may be regarded as a command. When the fourth control pin WRX is at a high level, the data signal transmitted between the display chip 12 and the micro control chip 11 can be regarded as a parameter or data.
Referring to fig. 1 and 2, the micro-control chip 11 further includes a first reset pin LCD _ RST, and the display screen chip 12 further includes a second reset pin RST. The first reset pin LCD _ RST is connected to the second reset pin RST, so that a reset signal can be transmitted between the micro control chip 11 and the display screen chip 12. The micro control chip 11 further includes a first clock pin LCD _ DCX, and the display chip 12 further includes a second clock pin DCX. The first clock pin LCD _ DCX is connected to the second clock pin DCX, so that the micro control chip 11 and the display screen chip 12 can transmit clock signals therebetween. The micro control chip 11 further includes a first chip selection pin LCD _ CSX, and the display screen chip 12 further includes a second chip selection pin CSX. The first chip select pin LCD _ CSX is connected to the second chip select pin CSX, so that a chip select signal can be transmitted between the micro control chip 11 and the display screen chip 12, and the chip select signal is a signal used when one or one integrated circuit chip is selected. The display screen chip 12 further includes a ground pin GND which is grounded.
The utility model discloses a theory of operation does: when the bidirectional display screen data transmission circuit 10 works, if the micro control chip 11 needs to send data to the display screen, the micro control chip 11 controls the second control pin LCD _ SDA _ IN to be IN a high impedance state through the control unit, and at this time, the second communication unit 132 is IN a cut-off state. Then, the micro control chip 11 outputs a first data signal through the first control pin LCD _ SDA _ OUT. Also, since the data communication module 13 is provided with the first diode D3 and the second diode D4, the pin level of the second control pin LCD _ SDA _ IN does not affect the transmission to the data communication module 13. The first data signal flows to the display control pin SDAI/O of the display screen chip 12 through the first diode D3 of the first communication unit 131, and then, the display control pin SDAI/O of the display screen chip 12 receives the first data signal.
If the micro control chip 11 needs to read the data of the display screen chip 12, the control unit controls the first control pin LCD _ SDA _ OUT to be in a low level state, and at this time, the first communication unit 131 is in a cut-off state. The display chip 12 then outputs a second data signal via the display control pin SDAI/O. Also, since the data communication module 13 is provided with the first diode D3 and the second diode D4, the pin level of the first control pin LCD _ SDA _ OUT does not affect the transmission to the data communication module 13. The second data signal flows to the second control pin LCD _ SDA _ IN of the micro control chip 11 through the second diode D4 of the second communication unit 132. Subsequently, the second control pin LCD _ SDA _ IN of the micro control chip 11 receives the second data signal.
The utility model provides a two-way transmission circuit of display screen data, this two-way transmission circuit of display screen data are including little control chip, display screen chip, data communication module, and this data communication module is provided with first communication unit and second communication unit. When the first communication unit is in a working state, the micro control chip outputs a first data signal through the first control pin. The first data signal can be transmitted to a display control pin of the display screen chip through the first communication unit, and at the moment, the second communication unit is in a cut-off state. And when the second communication unit is in a working state, the display control pin of the display screen chip outputs a second data signal. The second data signal can be transmitted to a second control pin of the micro control chip through the second communication unit, and the first communication unit is in a cut-off state at the moment. Therefore, the data signals can be transmitted between the microprocessing unit and the display screen in a two-way mode. The display screen data bidirectional transmission circuit can optimize the data transmission mode between the microprocessing unit and the display screen, and effectively solves the technical problem that the data is difficult to be transmitted bidirectionally between the existing display screen and the microprocessing chip. Moreover, the circuit structure of the bidirectional data transmission circuit of the display screen is simpler, and the requirement on hardware technology is not high. The user designs the circuit in the electronic equipment, so that the production cost of the electronic equipment can be effectively reduced.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.
Claims (9)
1. A display screen data bidirectional transmission circuit is characterized by comprising:
the micro-control chip comprises a first control pin for outputting a first data signal and a second control pin for receiving a second data signal;
the display screen chip comprises a display control pin for receiving the first data signal and sending the second data signal;
the data communication module comprises a first communication unit and a second communication unit, wherein the first communication unit is connected with the first control pin and the display control pin, and the second communication unit is connected with the second control pin and the display control pin;
when the first communication unit is in a working state, the second communication unit is in a cut-off state; when the second communication unit is in a working state, the first communication unit is in a cut-off state.
2. The bidirectional transmission circuit for display screen data of claim 1, wherein the first communication unit is a unidirectional conducting unit, and the first data signal output by the first control pin is transmitted to the display control pin through the first communication unit.
3. The bidirectional data transmission circuit of claim 2, wherein the first communication unit comprises a first diode, an anode of the first diode is connected to the first control pin, and a cathode of the first diode is connected to the display control pin.
4. The bi-directional transmission circuit for display screen data according to claim 1, wherein the second communication unit is a unidirectional conducting unit, and the second data signal output by the display control pin is transmitted to the second control pin through the second communication unit.
5. The display screen data bidirectional transmission circuit according to claim 4, wherein the second communication unit includes a second diode, a cathode of the second diode is connected to the second control pin, and an anode of the second diode is connected to the display control pin.
6. The bidirectional transmission circuit of data on a display screen of claim 1, wherein the micro control chip further comprises a control unit for controlling the first control pin and the second control pin, when the micro control chip sends data to the display screen chip, the control unit controls the second control pin to be in a high impedance state, and the first control pin outputs a first data signal to the display control pin through the first communication unit.
7. The bidirectional data transmission circuit of claim 6, wherein when the micro control chip reads data from the display screen chip, the control unit controls the first control pin to be in a low level state, and the display control pin outputs a second data signal to the second control pin through a second communication unit.
8. The bidirectional transmission circuit for display screen data of claim 1, further comprising a power supply module, wherein the power supply module is connected to the micro control chip, the micro control chip further comprises a power pin, the display screen chip comprises a power pin, the power pin is connected to the power pin, and the power supply module is configured to output an operating voltage to the micro control chip and the display screen chip.
9. An electronic device, characterized in that it comprises a bidirectional transmission circuit of display screen data according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222332884.3U CN217883613U (en) | 2022-08-31 | 2022-08-31 | Display screen data bidirectional transmission circuit and corresponding electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222332884.3U CN217883613U (en) | 2022-08-31 | 2022-08-31 | Display screen data bidirectional transmission circuit and corresponding electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN217883613U true CN217883613U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222332884.3U Active CN217883613U (en) | 2022-08-31 | 2022-08-31 | Display screen data bidirectional transmission circuit and corresponding electronic equipment |
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| CN (1) | CN217883613U (en) |
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- 2022-08-31 CN CN202222332884.3U patent/CN217883613U/en active Active
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