CN213880034U - Display device without HDMI interface - Google Patents
Display device without HDMI interface Download PDFInfo
- Publication number
- CN213880034U CN213880034U CN202120134108.5U CN202120134108U CN213880034U CN 213880034 U CN213880034 U CN 213880034U CN 202120134108 U CN202120134108 U CN 202120134108U CN 213880034 U CN213880034 U CN 213880034U
- Authority
- CN
- China
- Prior art keywords
- typec
- hdmi
- signal
- chip
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A display device free of an HDMI interface relates to the technical field of display devices. It includes: a TypeC interface; a TypeC protocol chip; switching the chips; a DP switch; and a display main control chip provided with a DP receiving end and an HDMI receiving end; the TypeC interface is connected to a DP receiving end and an HDMI receiving end of the display main control chip through the switching chip and the DP switch; the CC pin of the TypeC interface is connected with the TypeC protocol chip and used for judging whether a transmission signal is an HDMI signal or a TypeC signal and judging the positive and negative insertion state of the transmission signal by the TypeC protocol chip; the TypeC protocol chip is also used for controlling the switching chip to switch the transmission signal into a forward insertion state; the TypeC protocol chip is also used for controlling the DP switch to connect the TypeC signal in the forward plugging state to the DP receiving end and connect the HDMI signal in the forward plugging state to the HDMI receiving end. By adopting the technical scheme, the HDMI signal compatible type-C interface has the advantages of being compatible with HDMI signals, small in size and convenient to carry.
Description
Technical Field
The utility model relates to a display device technical field, concretely relates to exempt from display device of HDMI interface.
Background
With the increasing number of TypeC signal devices, portable display devices are becoming more and more popular. Because the TypeC interface is small in size and capable of supplying power and outputting signals, the portable display device is provided with the TypeC interface.
However, the existing display devices are also provided with HDMI interfaces, so that the display devices are large in size and inconvenient to carry.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a display device who exempts from HDMI interface, have the type C interface can compatible HDMI signal, and small, portable's advantage.
In order to achieve the above object, the utility model adopts the following technical scheme: an HDMI interface-free display device comprising: a TypeC interface; a TypeC protocol chip; switching the chips; a DP switch; and a display main control chip provided with a DP receiving end and an HDMI receiving end; the TypeC interface is connected to a DP receiving end and an HDMI receiving end of the display main control chip through the switching chip and the DP switch; the CC pin of the TypeC interface is connected with the TypeC protocol chip and used for judging whether a transmission signal is an HDMI signal or a TypeC signal and judging the positive and negative insertion state of the transmission signal by the TypeC protocol chip; the TypeC protocol chip is also used for controlling the switching chip to switch the transmission signal into a forward insertion state; the TypeC protocol chip is also used for controlling the DP switch to connect the TypeC signal in the forward plugging state to the DP receiving end and connect the HDMI signal in the forward plugging state to the HDMI receiving end.
The utility model discloses further set up, the display device of HDMI interface still includes the selection switch; the CC pin of the TypeC interface is respectively connected with the TypeC protocol chip and the hot plug detection end of the display main control chip through the selector switch; the TypeC interface reuses a TypeC protocol signal and a hot plug signal to the CC pin through the selector switch; and in an initial state, the selector switch is communicated with the TypeC protocol chip.
The utility model discloses further set up, display main control chip's model is RTD2795 UT.
The utility model discloses further set up, the model that switches the chip is TI 460. .
After the technical scheme is adopted, the beneficial effects of the utility model are that: the TypeC interface can be compatible with an HDMI input source, so that the display equipment does not need to be provided with an HDMI interface, can be made smaller, and is more convenient to carry.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a block diagram of the present invention;
fig. 2 is a flow chart of the present invention.
Description of reference numerals: 1. a TypeC interface; 2. a selector switch; 3. a TypeC protocol chip; 4. switching the chips; 5. a DP switch; 6. a DP receiving end; 7. an HDMI receiving end; 8. display master control chip.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment as required without making a contribution, but all the embodiments are protected by the patent law within the scope of the claims of the present invention.
The present embodiment relates to a display device without an HDMI interface, as shown in fig. 1, including: TypeC interface 1; a TypeC protocol chip 3; a switching chip 4; a DP switch 5; and a display main control chip 8 provided with a DP sink 6 and an HDMI sink 7.
In this application, since there is a problem of the forward and reverse insertion of the plug-in device inserted in the TypeC interface 1, the swapping is required. The CC pins are a pair of differential signal lines in the TypeC interface 1, and are used to communicate with the TypeC protocol chip 3. The HPD is a hot plug detection end of the display main control chip 8, and has only one pin, and the display main control chip 8 controls the pin to inform the HDMI plug-in device whether the display end is connected or not. When an HDMI is used for inserting equipment, a wire with one end being HDMI and the other end being TypeC is externally connected, the HDMI is an input end, and the TypeC is an output end.
Specifically, the TypeC interface 1 is connected to the DP receiving terminal 6 and the HDMI receiving terminal 7 of the display main control chip 8 through the switch chip 4 and the DP switch 5. The CC pin of the TypeC interface 1 is connected with the TypeC protocol chip 3 and used for the TypeC protocol chip 3 to judge whether the transmission signal is an HDMI signal or a TypeC signal and judge the positive and negative insertion state of the transmission signal. The TypeC protocol chip 3 is also used to control the switching chip 4 to switch the transmission signal to the positive insertion state. The TypeC protocol chip 3 is also used for controlling the DP switch 5 to connect the TypeC signal in the forward plugging state to the DP receiving terminal 6 and connect the HDMI signal in the forward plugging state to the HDMI receiving terminal 7.
The TypeC protocol chip 3 is communicated with the plug-in equipment through a CC pin of the TypeC interface 1, when the communication is successful, the input signal is a TypeC signal, when the communication is unsuccessful, the input signal is an HDMI signal, and meanwhile, the TypeC protocol chip 3 judges the positive and negative plugging states of the input signal according to the grounding state of the CC pin. The TypeC interface 1 can be compatible with an HDMI signal source, so that the display equipment does not need to be provided with an HDMI interface, can be made smaller and is more convenient to carry.
Specifically, the model of the display main control chip 8 is RTD2795 UT. RTD2795UT has two sets of DP sink 6 and two sets of HDMI sink 7. The type c signal is received by the DP receiver 6 (the video signal transmitted by type c is in DP format), and the HDMI signal is received by the HDMI receiver 7.
Specifically, in the present embodiment, the model of the switch chip 4 is TI 460. The TI460 may exchange the positive and negative of the input signal and then output again.
In other embodiments, there may be one or more TypeC interfaces 1.
The utility model also provides a compatible HDMI's of Type interface method, including following step: as shown in figure 2 of the drawings, in which,
s1, in an initial state, the TypeC protocol chip 3 is communicated with the TypeC interface 1 through the selector switch, the TypeC protocol chip 3 is communicated with the plug-in equipment through the CC pin of the TypeC interface 1, whether an input signal is an HDMI signal or a TypeC signal is judged, and meanwhile, the positive and negative plug-in states of the transmission signal are judged; when the communication is successful, the input signal is a TypeC signal, when the communication is unsuccessful, the input signal is an HDMI signal, and meanwhile, the TypeC protocol chip 3 judges the positive and negative insertion states of the input signal according to the grounding state of the CC pin;
s2, when the TypeC protocol chip 3 judges that the input signal is the TypeC signal and the TypeC signal is in the positive insertion state, the switching chip 4 does not switch the positive and negative states of the TypeC signal; when the TypeC protocol chip 3 judges that the input signal is the TypeC signal and the TypeC signal is in the reverse insertion state, the TypeC protocol chip 3 controls the switching chip 4 to switch the TypeC signal to the forward insertion state; when the TypeC protocol chip 3 judges that the input signal is an HDMI signal and the HDMI signal is in a positive insertion state, the switching chip 4 does not switch the positive state and the negative state of the HDMI signal; when the TypeC protocol chip 3 judges that the input signal is an HDMI signal and the HDMI signal is in a reverse plug state, the TypeC protocol chip 3 controls the switching chip 4 to switch the HDMI signal into a forward plug state;
s3, when the input signal is a TypeC signal, the TypeC protocol chip 3 controls the DP switch 5 to connect the TypeC signal in the positive insertion state to the DP receiving end 6 of the display main control chip 8; when the input signal is an HDMI signal, the TypeC protocol chip 3 controls the DP switch 5 to connect the HDMI signal in the normal insertion state to the HDMI receiving terminal 7 of the display main control chip 8;
s31, when the input signal is an HDMI signal, after the step of S3 is executed, the TypeC protocol chip 3 reversely controls the selector switch 2 to enable the CC pin of the TypeC interface 1 to be communicated with the hot plug detection end of the display main control chip 8;
s4, the display main control chip 8 processes the received TypeC signal or HDMI signal and outputs the processed signal to the processor.
The method enables the TypeC interface to be compatible with the HDMI input source, the TypeC signal or the HDMI signal can be used no matter what the input is, and the display equipment using the method does not need to be provided with the HDMI interface, so that the display equipment can be smaller and is more convenient to carry.
The above description is only for the purpose of illustration and not limitation, and other modifications or equivalent replacements made by those skilled in the art to the technical solution of the present invention should be covered by the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. An HDMI interface-free display device, comprising: a TypeC interface (1); a TypeC protocol chip (3); a switching chip (4); a DP switch (5); and a display main control chip (8) provided with a DP receiving end (6) and an HDMI receiving end (7);
the TypeC interface (1) is connected to a DP receiving end (6) and an HDMI receiving end (7) of the display main control chip (8) through the switching chip (4) and the DP switch (5);
the CC pin of the TypeC interface (1) is connected with the TypeC protocol chip (3) and used for judging whether a transmission signal is an HDMI signal or a TypeC signal and judging the positive and negative insertion state of the transmission signal by the TypeC protocol chip (3);
the TypeC protocol chip (3) is also used for controlling the switching chip (4) to switch the transmission signal into a positive insertion state;
the TypeC protocol chip (3) is also used for controlling the DP switch (5) to connect the TypeC signal in the plug-in state to the DP receiving end (6) and connect the HDMI signal in the plug-in state to the HDMI receiving end (7).
2. An HDMI-exempt interface display device according to claim 1, further comprising a selection switch (2); the CC pin of the TypeC interface (1) is respectively connected with the TypeC protocol chip (3) and the hot plug detection end of the display main control chip (8) through the selector switch (2); the TypeC interface (1) reuses a TypeC protocol signal and a hot plug signal to the CC pin through the selector switch (2); in an initial state, the selection switch (2) is communicated with the TypeC protocol chip (3).
3. The HDMI interface-free display device of claim 1, wherein the model of the display main control chip (8) is RTD2795 UT.
4. The HDMI interface-free display device according to claim 1, wherein the model of the switch chip (4) is TI 460.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120134108.5U CN213880034U (en) | 2021-01-18 | 2021-01-18 | Display device without HDMI interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120134108.5U CN213880034U (en) | 2021-01-18 | 2021-01-18 | Display device without HDMI interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213880034U true CN213880034U (en) | 2021-08-03 |
Family
ID=77045909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120134108.5U Active CN213880034U (en) | 2021-01-18 | 2021-01-18 | Display device without HDMI interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213880034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022151769A1 (en) * | 2021-01-18 | 2022-07-21 | 深圳市松冠科技有限公司 | Display device without hdmi interface and method for enabling type interface to be compatible with hdmi |
-
2021
- 2021-01-18 CN CN202120134108.5U patent/CN213880034U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022151769A1 (en) * | 2021-01-18 | 2022-07-21 | 深圳市松冠科技有限公司 | Display device without hdmi interface and method for enabling type interface to be compatible with hdmi |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107301148B (en) | USB Type-C interface conversion module, system and connection method | |
| CN109286771B (en) | Terminal equipment and control method thereof | |
| CN106992372B (en) | USB cable, USB interface and adapter | |
| CN213880034U (en) | Display device without HDMI interface | |
| CN102932683A (en) | Mobile high-definition link (MHL) realizing method and video playing device | |
| CN205195849U (en) | Signal transmission circuit | |
| CN117793274A (en) | Repeater, receiving end plug, active cable and signal transmission method | |
| US9584919B2 (en) | Interface switching system and method for switching operation mode | |
| CN114827511A (en) | HDMI interface-free display device and method for realizing compatibility of Type interface and HDMI | |
| CN110323644B (en) | Adapter and signal transmission method thereof | |
| CN216930173U (en) | Display control circuit and display device based on TypeC blind plugging | |
| CN212324235U (en) | Video signal switching circuit and signal switching equipment | |
| CN203261410U (en) | Digital TV system | |
| CN212624036U (en) | TYPE-C interface circuit | |
| US11487697B2 (en) | HDMI-free display device and method for type interface being compatible with HDMI | |
| CN111836098B (en) | Multi-interface wireless same-screen device and wireless same-screen method | |
| CN104994320B (en) | A kind of HDMI service equipments | |
| CN201349268Y (en) | Liquid crystal display television and interface circuit thereof | |
| CN212749821U (en) | Data conversion device and terminal equipment | |
| CN103473206A (en) | Data transmission method and I2C (Inter-Integrated Circuit) interface extender | |
| CN111651393A (en) | TYPE-C interface circuit | |
| CN108322798B (en) | CEC bus monitoring equipment | |
| CN216929106U (en) | Transmission channel control circuit and multi-interface system | |
| CN217932555U (en) | Circuit for docking station and docking station | |
| CN219393959U (en) | Switching module, first electronic equipment and second electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |