High-definition multimedia interface (HDMI) receiver apparatuses, HDMI systems using the same, and control methods therefor
View Patent ↗A high-definition multimedia interface (HDMI) receiver apparatus is provided. The HDMI receiver apparatus includes a pin, a control module, and an extended display identification data (EDID) module. The pin is used to receive an HDMI cable connection voltage in a first operation state and output a hot plug detection signal in a second operation state. The control module is connected with the pin. When the pin receives the HDMI cable connection voltage in the first operation state, the control module switches the pin to the second operation state from the first operation state and outputs the hot plug detection signal to an HDMI transmitter apparatus through the pin, such that the HDMI transmitter apparatus reads EDID information according to the hot plug detection signal. The EDID module is used to store the EDID information.
1. A high-definition multimedia interface (HDMI) receiver apparatus comprising:
one single pin for receiving an HDMI cable connection voltage via an HDMI cable connection port in a first operation state and outputting a hot plug detection signal in a second operation state;
a control module connected to the pin, wherein when the pin receives the HDMI cable connection voltage in the first operation state, the control module switches the in to the second operation state from the first operation state and outputs the hot plug detection signal to an HDMI transmitter apparatus through the pin, whereby the HDMI transmitter apparatus reads extended display identification data (EDID) information according to the hot plug detection signal;
a triode having a base electrically connected to the HDMI cable connection port, a collector electrically connected to the in and the hot plug detection signal, and an emitter electrically connected to a ground; and
an EDID module for storing the EDID information,
wherein the control module comprises:
a first switch unit for switching the pin to the second operation state from the first operation state when the pin detects that the HDMI cable connection voltage exists in the first operation state; and
a hot plug detection signal control unit for outputting the hot plug detection signal with a low level for a first predetermined duration, and outputting the hot plug detection signal with a high level for a second predetermined duration to the HDMI transmitter apparatus through the pin when the pin is switched to the second operation state.
2. The HDMI receiver apparatus as claimed in claim 1 , wherein the control module further comprises:
a second switch unit for switching the pin to the first operation state from the second operation state after the hot plug detection signal with the high level is output through the pin for the second predetermined duration.
3. The HDMI receiver apparatus as claimed in claim 1 , wherein the first predetermined duration is equal to or longer than 100 ms.
4. The HDMI receiver apparatus as claimed in claim 1 , wherein the second predetermined duration is equal to 300 ms.
5. A high-definition multimedia interface (HDMI) receiver apparatus comprising:
one single in for receiving an HDMI cable connection voltage via an HDMI cable connection port in a first operation state and outputting a hot plug detection signal in a second operation state;
a control module connected to the pin, wherein when the in receives the HDMI cable connection voltage in the first operation state, the control module switches the pin to the second operation state from the first operation state and outputs the hot plug detection signal to an HDMI transmitter apparatus through the pin, whereby the HDMI transmitter apparatus reads extended display identification data (EDID) information according to the hot plug detection signal;
a triode having a base electrically connected to the HDMI cable connection port, a collector electrically connected to the pin and the hot plug detection signal, and an emitter electrically connected to a ground;
an EDID module for storing the EDID information; and
a level control module for controlling the EDID module to be in an unreadable state when the HDMI receiver apparatus is powered off,
wherein the level control module comprises:
a triode having a base electrically connected to a power source, a collector electrically connected to the HDMI cable connection port, and an emitter electrically connected to ground.
6. A high-definition multimedia interface (HDMI) system comprises:
an HDMI receiver apparatus comprising:
one single in for receiving an HDMI cable connection voltage via an HDMI cable connection port in a first operation state and outputting a hot plug detection signal in a second operation state;
a control module connected to the pin, wherein when the in receives the HDMI cable connection voltage in the first operation state, the control module switches the pin to the second operation state from the first operation state and outputs the hot plug detection signal to an HDMI transmitter apparatus through the pin, whereby the HDMI transmitter apparatus reads extended display identification data (EDID) information according to the hot plug detection signal;
a triode having a base electrically connected to the HDMI cable connection port, a collector electrically connected to the pin and the hot plug detection signal, and an emitter electrically connected to a ground;
an EDID module for storing the EDID information; and
the HDMI transmitter apparatus for communicating with the HDMI receiver apparatus through an HDMI cable,
wherein the control module comprises:
a first switch unit for switching the pin to the second operation state from the first operation state when the pin detects that the HDMI cable connection voltage exists in the first operation state; and
a hot plug detection signal control unit for outputting the hot plug detection signal with a low level for a first predetermined duration, and outputting the hot plug detection signal with a high level for a second predetermined duration to the HDMI transmitter apparatus through the pin when the pin is switched to the second operation state.
7. The HDMI system as claimed in claim 6 , wherein the control module further comprises:
a second switch unit for switching the pin to the first operation state from the second operation state after the hot plug detection signal is output through the pin for the second predetermined duration with the high level.
8. The HDMI system as claimed in claim 6 , wherein the first predetermined duration is equal to or longer than 100 ms.
9. The HDMI system as claimed in claim 6 , wherein the second predetermined duration is equal to 300 ms.
10. A high-definition multimedia interface (HDMI) system comprises:
an HDMI receiver apparatus comprising:
one single pin for receiving an HDMI cable connection voltage via an HDMI cable connection port in a first operation state and outputting a hot plug detection signal in a second operation state;
a control module connected to the pin, wherein when the pin receives the HDMI cable connection voltage in the first operation state, the control module switches the in to the second operation state from the first operation state and outputs the hot plug detection signal to an HDMI transmitter apparatus through the pin, whereby the HDMI transmitter apparatus reads extended display identification data (EDID) information according to the hot plug detection signal;
a triode having a base electrically connected to the HDMI cable connection port, a collector electrically connected to the in and the hot plug detection signal, and an emitter electrically connected to a ground;
an EDID module for storing the EDID information,
the HDMI transmitter apparatus for communicating with the HDMI receiver apparatus through an HDMI cable; and
a level control module for controlling the EDID module to be in an unreadable state when the HDMI receiver apparatus is powered off,
wherein the level control module comprises:
a triode having a base electrically connected to a power source, a collector electrically connected to the HDMI cable connection port, and an emitter electrically connected to ground.