CN210431637U - Device for realizing double-screen different display function - Google Patents
Device for realizing double-screen different display function Download PDFInfo
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- CN210431637U CN210431637U CN201921850336.1U CN201921850336U CN210431637U CN 210431637 U CN210431637 U CN 210431637U CN 201921850336 U CN201921850336 U CN 201921850336U CN 210431637 U CN210431637 U CN 210431637U
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Abstract
The utility model provides a device for realizing the function of dual-screen different display, which comprises a first display screen interface, a second display screen interface, a main controller and a video signal conversion chip; the first display screen interface is connected with the main controller; the second display screen interface is connected with the video signal conversion chip, and the video signal conversion chip is connected with the main controller; the first display screen interface is an HDMI interface, and the second display screen interface is an LVDS interface. Compared with the prior art, the device for realizing the double-screen different display function provided by the utility model realizes that one main controller outputs two different video signals by setting two different video output interfaces of the HDMI interface and the LVDS interface and setting one video conversion chip for the conversion of the output signal of the main controller so as to drive two display screens to display different information; the display screen has the advantages of simple structure and low production cost, and is suitable for the situation that one device needs two display screens.
Description
Technical Field
The utility model relates to an electronic equipment field, in particular to realize different function device that shows of double screen.
Background
As a display screen is used as a display part of information, with the development of electronic technology, various display screens such as liquid crystal display devices are increasingly used. Because in the equipment that has the display screen at present, the main control unit that uses only supports a display screen and uses, when needs realize many screen display, often need set up a plurality of video signal processing chips for mainboard circuit structure is complicated, the cost is higher, is unfavorable for the popularization and application of many display screen equipment.
SUMMERY OF THE UTILITY MODEL
In order to solve the above mentioned deficiencies in the prior art, the utility model provides a device for realizing dual-screen different display function, which comprises a first display screen interface, a second display screen interface, a main controller and a video signal conversion chip; the first display screen interface is connected with the main controller; the second display screen interface is connected with the video signal conversion chip, and the video signal conversion chip is connected with the main controller; the first display screen interface is an HDMI interface, and the second display screen interface is an LVDS interface.
Further, the main controller is connected with the video signal conversion chip through an MI PI signal line.
Furthermore, an ESD protection chip is arranged between the first display screen interface and the main controller.
Furthermore, a choke coil is arranged between the main controller and the video signal conversion chip.
Furthermore, a thirteenth pin, a fifteenth pin and a sixteenth pin in the first display screen interface are respectively connected with corresponding pins of the main controller through a level conversion circuit; the level conversion circuit comprises an MOS tube, a diode, a first pull-up resistor and a second pull-up resistor.
Furthermore, the display screen connected with the first display screen interface and the display screen connected with the second display screen interface are both LCD display screens.
The utility model provides a realize two different video output interfaces of screen that show function device, through setting up HDM I interface and LVDS interface two differences to set up a video conversion chip and be used for the conversion of main control unit output signal, realize that a main control unit outputs two different video signal, in order to drive two display screens to show different information; compared with the prior art, the utility model provides a realize that two screens are different and show functional device only sets up a video conversion chip, simple structure, low in production cost is applicable to the situation that an equipment needs two display screens.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic diagram of a device for implementing a dual-screen differential display function provided by the present invention;
fig. 2 is a schematic diagram of a device for implementing a dual-screen differential display function provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As shown in fig. 1 and fig. 2, the utility model provides a device for realizing dual-screen different display function: the video display device comprises a first display screen interface, a second display screen interface, a main controller and a video signal conversion chip; the first display screen interface is connected with the main controller; the second display screen interface is connected with the video signal conversion chip, and the video signal conversion chip is connected with the main controller; the first display screen interface is an HDM I interface, and the second display screen interface is an LVDS interface.
Specifically, the utility model provides a realize two different display function devices of screen, including first display screen interface (as J1 shown in fig. 1) and second display screen interface (as J2 shown in fig. 2) two data interfaces of connecting the display screen, and main control unit (as U1 shown in fig. 1) and video signal conversion chip (as U2 shown in fig. 2); the first display screen interface is an HDM I interface, and the second display screen interface is an LVDS interface; as shown in fig. 1, ESD protection chips (such as U3, U4, and U5 shown in fig. 1) are connected in series to a connection line between the first display screen interface and the main controller, and are used to reduce damage to components in the device caused by static electricity and improve the quality of data transmission between the main controller and the first display screen interface.
As shown in fig. 1, a thirteenth pin, a fifteenth pin and a sixteenth pin in the first display screen interface are respectively connected to corresponding pins of the main controller through a level shift circuit; the level conversion circuit comprises an MOS tube, a diode, a first pull-up resistor and a second pull-up resistor; the MOS tube is an N-channel MOS tube with a parasitic diode. As shown in fig. 1, taking a level shift circuit connected to a sixteenth pin in the first display screen interface as an example for description, one pin of the first display screen interface is connected to a 5V dc power supply through a first pull-up resistor R8404 and a diode D8401 in sequence, and the other pin is connected to a drain of a MOS transistor Q1; one path of a corresponding pin of the main controller is connected to a 3V direct-current power supply through a second pull-up resistor R8403, and the other path of the corresponding pin is connected to a source electrode of a MOS transistor Q1; the grid electrode of the MOS tube is connected to a 3V direct current power supply. The circuit structures of the level conversion circuits connected with the thirteenth pin, the fifteenth pin and the sixteenth pin in the first display screen interface are the same, and a description thereof is not repeated.
In actual work, when the voltage of the main controller is 0V, the MOS tube is conducted, and the corresponding pin of the first display screen interface is pulled down to 0V by the pin of the main controller; when the pin of the main controller is 3V, the MOS tube is cut off at the moment, and the corresponding pin of the first display screen interface is pulled to be 5V by the first pull-up resistor. Through the level conversion circuit, the main controller and the first display screen interface can stably transmit data even if the respective working voltages are different.
As shown in fig. 2, the apparatus for implementing dual-screen different display function provided in the embodiment of the present invention further includes a video signal conversion chip; the main controller is connected with the video signal conversion chip through an MI PI signal line, the video signal conversion chip is connected with the second display screen interface through an LVDS signal line, and the video signal conversion chip converts the MI PI video signal sent by the main controller into an LVDS video signal and sends the converted LVDS video signal to the second display screen interface.
Preferably, a choke coil (e.g., L3-L7 shown in fig. 1) is disposed between the main controller and the video signal conversion chip, so as to reduce noise during signal transmission between the main controller and the video signal conversion chip and improve quality of signal transmission.
Preferably, the first display screen interface and the second display screen interface are respectively connected with a display screen, and the display screen connected with the first display screen interface and the display screen connected with the second display screen interface are both LCD display screens.
The embodiment of the utility model provides a realize two different display function devices of screen, when actually working, main control unit directly exports HDMI video signal all the way, transmits to the first display screen through first display screen interface, realizes the information display of first display screen; meanwhile, the main controller can output a path of MI P I video signal to the video signal conversion chip, the video signal conversion chip is converted into an LVDS video signal, and then the LVDS video signal is transmitted to the second display screen through the second display screen interface, so that information display of the second display screen is realized. Therefore, the two display screens are driven by one main controller to display, and the two display screens display different information, so that the display device is suitable for the situation that one device needs two display screens.
The embodiment of the utility model provides a realize two different video output interfaces of screen that show function device, through setting up HDMI interface and LVDS interface two differences to set up a video conversion chip and be used for the conversion of main control unit output signal, realize that a main control unit exports two different video signal, in order to drive two display screens to show different information; compared with the prior art, the embodiment of the utility model provides a realize that two screens are different and show functional device only sets up a video conversion chip, simple structure, and low in production cost is applicable to the situation that an equipment needs two display screens.
Although terms such as interface, main controller, level shifting circuit, MOS transistor, video conversion chip, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a realize two different function devices that show of screen which characterized in that: the video display device comprises a first display screen interface, a second display screen interface, a main controller and a video signal conversion chip; the first display screen interface is connected with the main controller; the second display screen interface is connected with the video signal conversion chip, and the video signal conversion chip is connected with the main controller; the first display screen interface is an HDMI interface, and the second display screen interface is an LVDS interface.
2. The apparatus for implementing dual-screen different display function according to claim 1, wherein: the main controller is connected with the video signal conversion chip through an MIPI signal wire.
3. The apparatus for implementing dual-screen different display function according to claim 1, wherein: and an ESD protection chip is arranged between the first display screen interface and the main controller.
4. The apparatus for implementing dual-screen different display function according to claim 1, wherein: and a choke coil is arranged between the main controller and the video signal conversion chip.
5. The apparatus for implementing dual-screen different display function according to claim 1, wherein: a thirteenth pin, a fifteenth pin and a sixteenth pin in the first display screen interface are respectively connected with corresponding pins of the main controller through a level conversion circuit; the level conversion circuit comprises an MOS tube, a diode, a first pull-up resistor and a second pull-up resistor.
6. The apparatus for implementing dual-screen different display function according to claim 1, wherein: and the display screen connected with the first display screen interface and the display screen connected with the second display screen interface are both LCD display screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921850336.1U CN210431637U (en) | 2019-10-29 | 2019-10-29 | Device for realizing double-screen different display function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921850336.1U CN210431637U (en) | 2019-10-29 | 2019-10-29 | Device for realizing double-screen different display function |
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| CN210431637U true CN210431637U (en) | 2020-04-28 |
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| CN201921850336.1U Active CN210431637U (en) | 2019-10-29 | 2019-10-29 | Device for realizing double-screen different display function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112242122A (en) * | 2020-10-09 | 2021-01-19 | 北京如影智能科技有限公司 | Dual-screen display method, device and system based on android system |
| CN112349238A (en) * | 2021-01-06 | 2021-02-09 | 智道网联科技(北京)有限公司 | Vehicle-mounted device, display driving method, and control circuit |
-
2019
- 2019-10-29 CN CN201921850336.1U patent/CN210431637U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112242122A (en) * | 2020-10-09 | 2021-01-19 | 北京如影智能科技有限公司 | Dual-screen display method, device and system based on android system |
| CN112349238A (en) * | 2021-01-06 | 2021-02-09 | 智道网联科技(北京)有限公司 | Vehicle-mounted device, display driving method, and control circuit |
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