DISPLAY SYSTEM, DISPLAY DEVICE, AND HDMI DONGLE

摘要

A display system includes a display device and an HDMI dongle electrically connected to the display device. The display device includes a first transmission interface, a first control module, and a power supply module. The HDMI dongle includes a second transmission interface and a second control module. The first and the second transmission interfaces include transmission pins corresponding to each other. The first control module detects voltage of one pin to obtain matching state between the display device and the HDMI dongle and outputs an enabling signal. When the HDMI dongle matches the display device, the enabling signal controls the power supply module to transmit the power supply signal to the second control module through the first and the second transmission interfaces for charging the second control module. When the HDMI dongle does not match the display device, the power supply module is not transmitted to the second control module.

主权项

1. A display system comprising:
a display device comprising a first transmission interface, a first adapter circuit, a first control module, and a power supply module; and an HDMI dongle, the HDMI dongle electrically connected to the display device, and comprising a second transmission interface, a second control module, and a second adapter circuit; wherein the first transmission interface comprises a plurality of transmission pins, the plurality of transmission pins comprises a first primary transmission pin and a second primary transmission pin; the first adapter circuit is electrically connected to and provides voltage to the first primary transmission pin, the voltage of the first primary transmission pin represents a matching state between the HDMI dongle and the display device; the first control module detects the voltage of the first primary transmission pin to obtain the matching state, and outputs an enabling signal accordingly; the power supply module is electrically connected to the second primary transmission pin and provides a power supply signal, when the HDMI dongle matches the display device, the enabling signal controls the power supply module to transmit the power supply signal to the second primary transmission pin, thereby supplying power to the HDMI dongle through the second primary transmission pin; when the HDMI dongle does not match the display device, the enabling signal prevents the power supply module from transmitting the power supply signal to the second primary transmission pin; wherein the second transmission interface comprises a plurality of transmission pins, the plurality of transmission pins comprises a first secondary transmission pin and a second secondary transmission pin, the secondary transmission pin and the second secondary transmission pin are electrically connected to the first primary transmission pin and the first primary transmission pin, respectively; the second adapter circuit is electrically connected to the first secondary transmission pin and provides the voltage to the first secondary transmission pin, the second adapter circuit and the first adapter circuit cooperatively indentifies the voltage of the first primary transmission pin; the second control module is electrically connected to the second secondary transmission pin, receives the power supply signal from the second secondary transmission pin, and starts to work under a control of the power supplying signal.