CN108205512B - High-resolution multimedia interface device and control method thereof - Google Patents
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Abstract
The invention provides a high-resolution multimedia interface device and a control method thereof. The high-resolution multimedia interface device comprises a high-resolution multimedia interface connecting port, a control circuit, a master control circuit, a slave circuit and a switch circuit. The master control circuit and the slave circuit are used for respectively generating a master HDMI output signal and a slave HDMI output signal. The switch circuit is coupled to the HDMI connection port and the control circuit. The switch circuit is selectively conducted to a first conduction state and a second conduction state according to a control signal generated by the control circuit; when the switch circuit is switched on in a first conduction state, the switch circuit is electrically connected with the main control circuit, so that the main control HDMI output signal is output through the high-resolution multimedia interface connection port; when the switch circuit is switched on in the second conduction state, the switch circuit is electrically connected with the slave circuit, so that the slave HDMI output signal is output through the HDMI connection port.
Description
Technical Field
The present invention relates to an electronic device, and more particularly, to an electronic device supporting high resolution multimedia interface technology.
Background
In recent years, with the increasing popularity of High Definition Multimedia Interface (HDMI) technology, many electronic devices have HDMI connection ports mounted thereon, such as game machines, DVDs, personal computers and notebook computers as source devices, or televisions, projectors and computer monitors as source playback devices. Only one HDMI transmission line is needed between the source end device and the source playing device to output the HDMI signal containing audio and video from the source end device to the source playing device. For example, the personal computer can extend and output the display picture and the audio to the television for playing video and audio.
However, in the well-known HDMI technology, the source end device usually does not support the function of playing the source output by other source end devices, and the source playing device does not support the function of outputting the source, if the dual functions of outputting the source and receiving the source for playing are supported, an HDMI connection port must be added to the electronic device, wherein one HDMI connection port is used to receive the HDMI signal from other source end devices, and the other HDMI connection port is used to output the source to other source playing devices, so that the number of communication ports that the electronic device needs to accommodate increases, resulting in the increase of the volume of the electronic device. If the number of communication ports is increased, the number of other communication ports, such as USB connection ports, is sacrificed. Moreover, the additional use of an HDMI connection port also increases the production cost of the product. Furthermore, if the electronic device includes two HDMI connection ports, the user must rely on the mark beside the HDMI connection ports to identify which of the two HDMI connection ports is the source output port and which is the source receiving port, and if the identification is wrong, the HDMI transmission line is connected to the wrong connection port, which results in that the source end playing device cannot normally play the source, thus causing inconvenience to the user.
Disclosure of Invention
In view of the above, the present invention provides a high-resolution multimedia interface device and a control method thereof.
Therefore, the present invention provides a high-resolution multimedia interface device, which includes a high-resolution multimedia interface connection port, a control circuit, a master control circuit, a slave circuit, and a switch circuit. The control circuit is used for generating a control signal; the master control circuit is used for generating a master control high-resolution multimedia interface output signal; the slave circuit is used for generating a slave high-resolution multimedia interface output signal; the switch circuit is coupled to the high-resolution multimedia interface connection port and the control circuit and is used for selectively conducting in a first conduction state and a second conduction state according to the control signal; when the switch circuit is switched on in the first conduction state, the switch circuit is electrically connected with the main control circuit, so that the output signal of the main control high-resolution multimedia interface is output through the high-resolution multimedia interface connection port; when the switch circuit is switched on in the second conduction state, the switch circuit is electrically connected to the slave circuit, so that the slave high-resolution multimedia interface output signal is output through the high-resolution multimedia interface connection port.
In some embodiments, the master circuit is further configured to receive a slave hdmi input signal, and the slave circuit is further configured to receive a master hdmi input signal; when the switch circuit is switched on in a first conduction state, the master control circuit receives a slave high-resolution multimedia interface input signal through the high-resolution multimedia interface connection port; when the switch circuit is switched on in the second conduction state, the slave circuit receives the input signal of the master high-resolution multimedia interface through the high-resolution multimedia interface connection port.
In some embodiments, the master hdmi output signal comprises a tsm differential signal output signal and a power output signal, the master hdmi input signal comprises a tsm differential signal input signal and a power input signal, the slave hdmi input signal comprises an osd identification information input signal and a hot-plug detection input signal, and the slave hdmi output signal comprises an osd identification information output signal and a hot-plug detection output signal.
In some embodiments, the control circuit is coupled to the hdmi connector, and the switch circuit is turned on in the first conducting state according to a logic level of the control signal, and if the control circuit receives the power input signal through the hdmi connector, the control circuit generates a control signal with another logic level to switch the switch circuit from the first conducting state to the second conducting state.
In some embodiments, the control circuit is coupled to the slave circuit, and the switch circuit is turned on in the first conducting state according to a logic level of the control signal, and if the control circuit receives the extended display identification information output signal via the slave circuit, the control circuit generates a control signal with another logic level, so that the switch circuit is switched from the first conducting state to the second conducting state.
In some embodiments, the main control circuit is coupled to the control circuit, and the main control circuit and the control circuit are respectively a platform control hub and an embedded controller, and the main control circuit receives a power-on power supply to drive the embedded controller to generate a control signal, so that the switch circuit is switched on in the first conduction state.
In some embodiments, the control circuit is an embedded controller, and the control circuit receives a standby power to supply the slave circuit and the switch circuit.
In some embodiments, the hdmi further includes a housing for accommodating the hdmi connection port, the control circuit, the master control circuit, the slave circuit and the switch circuit, and the housing is formed with a physical button for receiving a touch to generate a touch signal, and the control circuit generates the corresponding control signal according to the touch signal.
In some embodiments, the high-resolution multimedia interface device further includes a display unit accommodated in the housing, a video menu displayed by the display unit further includes a setting option of the on-state of the switch circuit, and the physical key receives the touch to change the setting option, so that the control circuit generates the corresponding control signal.
In some embodiments, a method for controlling a high-resolution multimedia interface device includes generating a master high-resolution multimedia interface output signal via a master circuit, electrically connecting the master circuit to a high-resolution multimedia interface connection port via a switch circuit, such that the master high-resolution multimedia interface output signal is output via the high-resolution multimedia interface connection port, generating a slave high-resolution multimedia interface output signal via a slave circuit, and electrically connecting the slave circuit to the high-resolution multimedia interface connection port via the switch circuit, such that the slave high-resolution multimedia interface output signal is output via the high-resolution multimedia interface connection port.
In some embodiments, the method further includes receiving a slave hdmi input signal via the hdmi connection port, electrically connecting the master circuit and the hdmi connection port via the switch circuit, such that the master circuit receives the slave hdmi input signal via the hdmi connection port, receives a master hdmi input signal via the hdmi connection port, and electrically connects the slave circuit and the hdmi connection port via the switch circuit, such that the slave circuit receives the master hdmi input signal via the hdmi connection port.
The invention has the beneficial effects that according to the high-resolution multimedia interface device and the control method thereof, one HDMI connecting port of the high-resolution multimedia interface device can be connected with the master control end device and the slave end device. Therefore, the high-resolution multimedia interface device can be used as a master control end and a slave end, compared with the prior art, the number of the HDMI connecting ports does not need to be increased, and the production cost of the high-resolution multimedia interface device is further saved. In addition, the user does not need to identify the HDMI connection port as the input port or the output port by naked eyes, so that the use convenience is improved.
[ description of the drawings ]
FIG. 1 is a block diagram of an embodiment of a high-resolution multimedia interface device according to the invention.
Fig. 2 is a block diagram of the hdmi device 1 of fig. 1 connected to a slave device 2.
Fig. 3 is a block diagram illustrating an embodiment of the high-resolution multimedia interface device 1 in fig. 1 connected to a host device 3.
Fig. 4 is a block diagram of another embodiment of the high-resolution multimedia interface device 1 in fig. 1 connected to a host device 3.
FIG. 5 is a schematic diagram illustrating an appearance of an embodiment of a high-resolution multimedia interface device according to the invention.
FIG. 6 is a schematic diagram illustrating an embodiment of the high-resolution multimedia interface device according to the invention.
[ detailed description ] embodiments
FIG. 1 is a block diagram of an HDMI device according to the present invention. Referring to fig. 1, the high-resolution multimedia interface device 1 includes a high-resolution multimedia interface connection port 11, a control circuit 12, a master circuit 13, a slave circuit 14, and a switch circuit 15. The switch circuit 15 is coupled to the hdmi connector 11 and the control circuit 12, and the switch circuit 15 is selectively coupled to the master circuit 13 and the slave circuit 14. In some embodiments, the switch circuit 15 may be an electronic switch, for example, the switch circuit 15 may be implemented by a plurality of Metal Oxide Semiconductor Field Effect Transistors (MOSFETs).
The HDMI device 1 can be used for HDMI communication with other electronic devices having HDMI connection ports, and the master circuit 13 is used for generating a master HDMI output signal S1 and receiving a slave HDMI input signal S2 from the electronic devices. The slave circuit 14 is configured to generate the slave HDMI output signal S3 and receive a master HDMI input signal S4 from the electronic device. Furthermore, as shown in fig. 1, the switch circuit 15 is controlled by the control circuit 12, the control circuit 12 is configured to generate the control signal S5, the switch circuit 15 receives the control signal S5 generated by the control circuit 12, and the switch circuit 15 is switchable between the first conducting state and the second conducting state according to the logic level of the control signal S5. For example, a control signal S5 of a high logic level (i.e., logic "1") may cause the switch circuit 15 to be turned on in the first conducting state, and a control signal S5 of a low logic level (i.e., logic "0") may cause the switch circuit 15 to be turned on in the second conducting state. For example, the switch circuit 15 includes a plurality of MOSFETs, and a gate (gate) terminal of each MOSFET is coupled to the control circuit 12 for receiving the control signal S5.
Thus, the switch circuit 15 is selectively coupled to the master circuit 13 and the slave circuit 14 according to two conducting states of the switch circuit 15. When the switch circuit 15 is turned on in the first on state, the switch circuit 15 is electrically connected to the master circuit 13, and the HDMI device 1 can be used as a master (master) end, such that the master HDMI output signal S1 generated by the master circuit 13 is output through the HDMI connection port 11, and the master circuit 13 receives the slave HDMI input signal S2 through the HDMI connection port 11. On the other hand, when the switch circuit 15 is turned on in the second on state, the switch circuit 15 is electrically connected to the slave circuit 14, and the HDMI device 1 can be used as a slave (slave) terminal, such that the slave HDMI output signal S3 generated by the slave circuit 14 is output through the HDMI connection port 11, and the slave circuit 14 receives the master HDMI input signal S4 through the HDMI connection port 11.
Fig. 2 to 4 are block diagrams illustrating the high-resolution multimedia interface device 1 of fig. 1 as a master and a slave, respectively. Referring to fig. 2 to 4, it should be noted that the HDMI connector 11 has a Transition Minimized Differential Signaling (TMDS) Channel, a Display Data Channel (DDC) Channel, a Controller Electronics Control (CEC) Channel, a Power (Power) line, and a Hot Plug Detection (HPD) line, and the HDMI connector 11 is compatible with any conventional HDMI connector, such as an a-type (type) HDMI connector having 19 pins, a B-type HDMI connector having 29 pins, a C-type HDMI connector having 19 pins, and a D-type HDMI connector having 19 pins. The user of the HDMI device 1 can connect one end of any type of HDMI cable to the HDMI connection port 11 and the other end to the slave device 2 or the master device 3 to transmit the video data in HDMI format.
Accordingly, as shown in FIG. 2, the master control circuit 13 can generate a master HDMI output signal S1 including a TMDS output signal S11 and a power output signal S12, wherein the TMDS output signal S11 and the power output signal S12 can be respectively outputted via the TMDS channels and the power lines of the HDMI connection port 11. The master circuit 13 may receive a slave HDMI input signal S2 including an Extended Display Identification Data (EDID) input signal S21 and an HPD input signal S22 via the DDC channel and the HPD line, respectively. Also, as shown in fig. 3, the slave circuit 14 may generate a slave HDMI output signal S3 including an EDID output signal S31 and an HPD output signal S32, the EDID output signal S31 and the HPD output signal S32 may be output through the DDC channel and the HPD line, respectively. The slave circuit 14 may receive a master HDMI input signal S4 including a TMDS input signal S41 and a power input signal S42 via TMDS channels and power lines, respectively.
Taking the high-resolution multimedia interface device 1 as a master, as shown in fig. 2, the high-resolution multimedia interface device 1 is connected to a slave device 2. The slave device 2 may include a high-resolution HDMI connection port 21, an HDMI control unit 22, and a rom 23. After the two ends of the HDMI cable are connected to the HDMI connector 11 and the HDMI connector 21, respectively, the switch circuit 15 is turned on in the first conducting state, so that the channels and lines of the HDMI connector 11 are electrically connected to the main control circuit 13 through the switch circuit 15. Thus, the power output signal S12 generated by the master circuit 13 can be transmitted to the slave device 2 through the switch circuit 15, the HDMI connector 11 and the HDMI connector 21, so that the HDMI control unit 22 of the slave device 2 and the read only memory 23 storing EDID respectively output the HPD input signal S22 and the EDID input signal S21 with high logic levels in response to the power output signal S12. Then, the host circuit 13 receives the EDID input signal S21 and the HPD input signal S22 through the hdmi connection port 11 and the switch circuit 15. The master circuit 13 can know that the hdmi connector 11 is connected to the slave device 2 according to the HPD input signal S22 with a high logic level. Also, the master control circuit 13 transmits the TMDS output signal S11 compatible with the display unit of the slave device 2 according to the EDID input signal S21. Finally, the TMDS output signal S11 is transmitted to the slave device 2 through the switch circuit 15, the hdmi connector 11 and the hdmi connector 21, so that the slave device 2 can play video and audio respectively.
Taking the hdmi device 1 as a slave, as shown in fig. 3, the hdmi device 1 is connected to a host device 3 including an hdmi connection port 31. The console device 3 includes a high-resolution multimedia interface connection port 31. After the two ends of the HDMI cable are connected to the HDMI connector 11 and the HDMI connector 31, respectively, the switch circuit 15 is turned on in the second conducting state, so that the channels and lines of the HDMI connector 11 are electrically connected to the slave circuit 14 through the switch circuit 15. Thus, the host device 3 can output the power input signal S42 through the hdmi connector 31, the power input signal S42 is transmitted to the slave circuit 14 through the hdmi connector 11 and the switch circuit 15, so that the slave circuit 14 outputs the EDID output signal S31 and the HPD output signal S32 with a high logic level, respectively, in response to the power input signal S42. Then, the EDID output signal S31 and the HPD output signal S32 are sent to the host device 3 through the switch circuit 15, the hdmi connector 11 and the hdmi connector 31, so that the host device 3 knows that the hdmi connector 31 is connected to the hdmi device 1. Then, the host device 3 outputs the TMDS input signal S41 compatible with the display unit 16 of the high-resolution hdmi device 1 according to the EDID output signal S31, and the TMDS input signal S41 is transmitted to the slave circuit 14 through the hdmi connection port 31, the hdmi connection port 11 and the switch circuit 15. Finally, the slave circuit 14 performs signal processing on the TMDS input signal S41 to send video and audio signals to the display unit 16 and the audio playback unit 17, respectively.
In some embodiments, the high-resolution multimedia interface device 1 may be an All In One (AIO) computer. As shown in fig. 5, the hdmi device 1 further comprises a housing 18, wherein the housing 18 can accommodate the hdmi connection port 11, the control circuit 12, the master circuit 13, the slave circuit 14 and the switch circuit 15. Here, the main control circuit 13 can be implemented by a Platform Controller Hub (PCH) of a computer to output a TMDS output signal S11 after video and audio integration. The slave circuit 14 can be implemented by an input/output chip (I/O chip) electrically connected to the rom, the decoder and the HPD controller. Wherein, the decoder can support Low Voltage Differential Signaling (LVDS) transmission, and the decoder decodes the TMDS input signal S41 and separates the video signal from the audio signal; the read-only memory stores EDID and can output EDID output signal S31; the HPD controller may output the HPD output signal S32 having a high logic level after receiving the power input signal S42 having a voltage level of 5V. The control circuit 12 can be an Embedded Controller (Embedded Controller) or any Application Specific Integrated Circuit (ASIC) with control function.
Therefore, in the embodiment where the high-resolution multimedia interface device 1 is an AIO computer, the high-resolution multimedia interface device 1 further includes a power supply unit, and when the high-resolution multimedia interface device 1 is powered on, the power supply unit provides a power supply for powering on, and the main control circuit 13 receives the power supply for operation. Therefore, the high-resolution multimedia interface device 1 can be preset as a master after being turned on, and the switch circuit 15 can be automatically turned on in the first conducting state according to the control signal S5. In detail, as shown in fig. 2, the main control circuit 13 is coupled to the control circuit 12, and the main control circuit 13 automatically drives the control circuit 12 after being powered, so that the control circuit 12 sends a control signal S5 with a corresponding logic level (e.g., a high logic level) to control the switch circuit 15 to be turned on in the first conducting state. Further, after the switch circuit 15 is turned on in the first conducting state, the high-resolution multimedia interface device 1 in the power-on state is not automatically switched from the master to the slave, i.e. the switch circuit 15 is not automatically switched from the first conducting state to the second conducting state when the high-resolution multimedia interface device 1 is turned on, and the switch circuit 15 is continuously turned on in the first conducting state so that the high-resolution multimedia interface device 1 can be connected to the slave 2.
On the other hand, when the high-resolution multimedia interface device 1 is not powered on or operates in some power-saving standby modes of power options of a Basic Input Output System (BIOS), the power supply unit may supply a standby power, and at this time, the control circuit 12, which is an embedded controller, may receive the standby power from the power supply unit and transmit the standby power to the slave circuit 14, the switch circuit 15, the audio playing unit 17, and the display unit 16, so that the slave circuit 14, the switch circuit 15, the audio playing unit 17, and the display unit 16 may operate independently after receiving the standby power. Therefore, the high-resolution multimedia interface device 1 can be used as a slave, so as to display video and play audio.
In the embodiment of the hdmi device 1 as a slave, if the switch circuit 15 is to be automatically turned on in the second conducting state, as shown in fig. 3, the control circuit 12 can be coupled to the hdmi connection port 11 to be coupled to the power line of the hdmi connection port 11. Furthermore, the control circuit 12 may include a buffer (buffer) to generate a corresponding control signal S5 according to the direction of the power signal to automatically set the on state of the switch circuit 15. In detail, if the control circuit 12 detects the received signal from the hdmi connection port 11 through the buffer, such as the power input signal S42, it indicates that the hdmi device 1 is acting as a slave. Thus, the control circuit 12 generates the corresponding control signal S5, for example, the control signal S5 having a low logic level can turn on the switch circuit 15 in the second conducting state, and the control circuit 12 generates the control signal S5 having a low logic level after detecting the power input signal S42. Therefore, if the switch circuit 15 is turned on in the first conducting state before the high-resolution multimedia interface device 1 is used as the slave, the control circuit 12 can generate the control signal S5 with another logic level according to the power input signal S42 from the host device 3, so that the switch circuit 15 is automatically switched from the first conducting state to the second conducting state, and after the switch circuit 15 is switched to the second conducting state, the high-resolution multimedia interface device 1 can normally communicate with the host device 3.
Alternatively, in other embodiments, if the slave circuit 14 does not generate the EDID output signal S31 based on the power input signal S42 but continuously transmits the EDID output signal S31, the control circuit 12 may include another buffer to detect the direction of the EDID signal to generate the corresponding control signal S5. As shown in fig. 4, the control circuit 12 may be coupled to the slave circuit 14 to receive the EDID signal generated by the slave circuit 14, such as the EDID output signal S31, when the control circuit 12 detects that the EDID signal is from the slave circuit 14, indicating that the high-resolution multimedia interface device 1 is acting as a slave, the control circuit 12 generates the control signal S5 with a low logic level to switch the switch circuit 15 to the second conducting state.
In some embodiments, the user of the hdmi 1 can also manually set the operation mode of the hdmi 1 to determine whether the hdmi 1 is a master or a slave. As shown in fig. 5, the housing 18 further includes a physical button 181 coupled to the control circuit 12, and when the user of the high-resolution multimedia interface device 1 touches the physical button 181, the physical button 181 can generate a touch signal to drive the control circuit 12 to generate the control signal S5, thereby setting the on state of the switch circuit 15, so that the high-resolution multimedia interface device 1 can be used as a slave or a master. For example, the physical key 181 may be a key for controlling an On Screen Display (OSD) of the Display unit 16, and when the user presses the physical key 181, the video adjustment menu displayed by the Display unit 16 further includes a setting option for enabling the hdmi device 1 to be a slave or a master, and the user can switch the setting option through the physical key 181 to drive the control circuit 12 to generate a corresponding control signal S5, thereby setting the On state of the switch circuit 15.
FIG. 6 is a schematic diagram illustrating an embodiment of the high-resolution multimedia interface device according to the invention. Referring to fig. 6, taking the two high-resolution multimedia interface devices 4 and 5 as AIO computers as an example, when the two high-resolution multimedia interface devices 4 and 5 are both turned on, the user needs to manually set the on-states of the switch circuits of the two high-resolution multimedia interface devices 4 and 5, respectively, or the user can set the on-state of the switch circuit of one of the two high-resolution multimedia interface devices, for example, if the two high-resolution multimedia interface devices 4 and 5 are both preset as the main control end (i.e., the switch circuits of the two high-resolution multimedia interface devices 4 and 5 are turned on in the first on-state in the preset state), the user needs to switch one of the two switch circuits to the second on-state through the physical buttons 181 and 182, so that the HDMI communication between the two high-resolution multimedia interface devices 4 and 5 can be performed normally.
In summary, according to an embodiment of the HDMI device and the control method thereof of the present invention, an HDMI connection port of the HDMI device can be connected to the master device and the slave device. Therefore, the high-resolution multimedia interface device can be used as a master control end and a slave end, compared with the prior art, the number of the HDMI connecting ports does not need to be increased, and the production cost of the high-resolution multimedia interface device is further saved. In addition, the user does not need to identify the HDMI connection port as the input port or the output port by naked eyes, so that the use convenience is improved.
Although the present invention has been described with reference to particular embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A high resolution multimedia interface device, comprising: comprises the following steps:
a high resolution multimedia interface connection port;
a control circuit for generating a control signal;
a master control circuit for generating a master high-resolution multimedia interface output signal and receiving a slave high-resolution multimedia interface input signal;
a slave circuit for generating the slave high resolution multimedia interface output signal and receiving the master high resolution multimedia interface output signal; and
a switch circuit, coupled to the hdmi connection port and the control circuit, for selectively conducting the hdmi connection port to a first conducting state and a second conducting state according to the control signal; when the switch circuit is switched on in the first conduction state, the switch circuit is electrically connected to the main control circuit, so that the main control high-resolution multimedia interface output signal is output through the high-resolution multimedia interface connection port; when the switch circuit is turned on in the second conducting state, the switch circuit is electrically connected to the slave circuit, so that the slave high resolution multimedia interface output signal is output through the high resolution multimedia interface connection port,
when the switch circuit is switched on in the first conduction state, the master control circuit receives the input signal of the slave high-resolution multimedia interface through the high-resolution multimedia interface connection port; when the switch circuit is turned on in the second on state, the slave circuit receives the master high-resolution multimedia interface input signal via the high-resolution multimedia interface connection port, the master high-resolution multimedia interface output signal includes a transmission minimized differential signal output signal and a power output signal, the master high-resolution multimedia interface input signal includes a transmission minimized differential signal input signal and a power input signal, the slave high-resolution multimedia interface input signal includes an extension display identification information input signal and a hot plug detection input signal, the slave high-resolution multimedia interface output signal includes an extension display identification information output signal and a hot plug detection output signal, the control circuit is coupled to the high-resolution multimedia interface connection port or the slave circuit, and the switch circuit is turned on after the first on state according to a logic level of the control signal, if the control circuit receives the power input signal via the hdmi connection port or receives the extended display identification information output signal via the slave circuit, the control circuit generates the control signal having another logic level to switch the switch circuit from the first conducting state to the second conducting state.
2. The high definition multimedia interface device as claimed in claim 1, wherein: the control circuit is an embedded controller, and receives a standby power supply to supply the slave circuit and the switch circuit.
3. The high definition multimedia interface device as claimed in claim 1, wherein: the main control circuit is coupled to the control circuit, the main control circuit is a platform control hub, the control circuit is an embedded controller, and the main control circuit receives a starting power supply to drive the embedded controller to generate the control signal, so that the switch circuit is conducted in the first conduction state.
4. The high definition multimedia interface device as claimed in claim 1, wherein: the multimedia interface device further comprises a shell, wherein the shell is used for accommodating the high-resolution multimedia interface connection port, the control circuit, the master control circuit, the slave circuit and the switch circuit, a physical key is formed on the shell and used for receiving a touch to generate a touch signal, and the control circuit generates the corresponding control signal according to the touch signal.
5. The high definition multimedia interface device as claimed in claim 4, wherein: the display unit is accommodated in the shell, a video adjusting function menu displayed by the display unit further comprises a setting option of the conducting state of the switch circuit, and the physical key receives the touch to change the setting option so that the control circuit generates the corresponding control signal.
6. A control method of a high-resolution multimedia interface device is characterized in that: comprises the following steps:
generating a control signal through a control circuit;
generating a master high-resolution multimedia interface output signal through a master control circuit;
the main control circuit is electrically connected with a high-resolution multimedia interface connecting port through a switch circuit, so that a main control high-resolution multimedia interface output signal is output through the high-resolution multimedia interface connecting port, and the switch circuit is selectively conducted in a first conduction state and a second conduction state according to the control signal;
generating a slave high-resolution multimedia interface output signal including an extended display identification information output signal and a hot plug detection output signal via a slave circuit;
the switch circuit is electrically connected with the slave circuit and the high-resolution multimedia interface connecting port, so that the output signal of the slave high-resolution multimedia interface is output through the high-resolution multimedia interface connecting port;
receiving a slave high resolution multimedia interface input signal via the high resolution multimedia interface connection port;
the switch circuit is electrically connected with the master control circuit and the high-resolution multimedia interface connecting port, so that the master control circuit receives the input signal of the slave high-resolution multimedia interface through the high-resolution multimedia interface connecting port;
receiving a master control high-resolution multimedia interface input signal through the high-resolution multimedia interface connection port, wherein the master control high-resolution multimedia interface input signal comprises a minimum transmission differential signal input signal and a power supply input signal; and
the switch circuit is electrically connected to the slave circuit and the hdmi port, such that the slave circuit receives the master hdmi input signal via the hdmi port, wherein the control circuit is coupled to the hdmi port or the slave circuit, and the switch circuit is turned on in the first on state according to a logic level of the control signal, and generates the control signal having another logic level if the control circuit receives the power input signal via the hdmi port or the extended display identification information output signal via the slave circuit, such that the switch circuit is switched from the first on state to the second on state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168552.9A CN108205512B (en) | 2016-12-16 | 2016-12-16 | High-resolution multimedia interface device and control method thereof |
Applications Claiming Priority (1)
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| CN101573977B (en) * | 2006-11-07 | 2013-12-25 | 索尼株式会社 | Transmitting device, video signal transmitting method in transmitting device, recieving device and video signal recieving method in recieving device |
| US9167282B2 (en) * | 2011-08-30 | 2015-10-20 | Broadata Communications, Inc. | Enhanced HDMI system and method |
| CN102572352B (en) * | 2011-12-26 | 2014-12-10 | 中兴通讯股份有限公司 | HDMI multiplexing method, HDMI, and equipped provided with HDMI |
| CN203279031U (en) * | 2012-12-21 | 2013-11-06 | 青岛海尔电子有限公司 | MHL-HDMI converting and receiving unit and television with same |
| KR101505669B1 (en) * | 2013-10-15 | 2015-03-24 | 옵티시스 주식회사 | Digital-image transmission apparatus performing communication, self-diagnosis and control |
| JP6733547B2 (en) * | 2014-09-11 | 2020-08-05 | ソニー株式会社 | Image processing apparatus and image processing method |
| CN105120196B (en) * | 2015-08-20 | 2018-05-29 | 深圳泰科晶显科技有限公司 | A kind of two-way multiplex system of HDMI and method |
| CN205158342U (en) * | 2015-10-19 | 2016-04-13 | 深圳微步信息股份有限公司 | HDMI interface multiplex circuit |
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