	US 11,928,074 B2
	USB active optical cable and plug capable of managing power consumption and status
Ting Chen, Beijing (CN); Hui Jiang, Beijing (CN); Xinliang Zhou, Beijing (CN); Dezhen Li, Beijing (CN); Yan Li, Beijing (CN); Yufeng Cheng, Beijing (CN); Liang Xu, Beijing (CN); and Jinfeng Tian, Beijing (CN)
Assigned to EVERPRO (WUHAN) TECHNOLOGIES COMPANY LIMITED, Wuhan (CN)
Filed by EverPro (Wuhan) Technologies Company Limited., Wuhan (CN)
Filed on May 19, 2022, as Appl. No. 17/664,056.
Claims priority of application No. 202110557211.5 (CN), filed on May 21, 2021; and application No. 202210066752.2 (CN), filed on Jan. 20, 2022.
Prior Publication US 2022/0374387 A1, Nov. 24, 2022
Int. Cl. G06F 13/42 (2006.01); G02B 6/42 (2006.01); G02B 6/43 (2006.01); G06F 13/38 (2006.01)

CPC G06F 13/4282 (2013.01) [G02B 6/4246 (2013.01); G02B 6/43 (2013.01); G06F 13/382 (2013.01); G06F 2213/0042 (2013.01)]

15 Claims

1. A USB active optical cable capable of managing power consumption and state, comprising a first plug, a second plug and an optical transmission medium used to connect the first plug and the second plug;

wherein the first plug is used to connect to a host, and comprises a first transmitting unit, a first receiving unit, and a first control unit, wherein

the first transmitting unit, includes a first electrical input port, a first transmitting high-speed transmission circuit and a first output circuit; and

the first receiving unit, includes a first electrical output port, a first receiving high-speed transmission circuit, and a first input circuit;

wherein the second plug is used to connect to a device, and comprises a second transmitting unit, a second receiving unit, and a second control unit, wherein

the second transmitting unit, includes a second electrical input port, a second transmitting high-speed transmission circuit and a second output circuit; and

the second receiving unit, includes a second electrical output port, a second receiving high-speed transmission circuit and a second input circuit; and

in response to the first plug being connected to the host, the first transmitting unit and the first receiving unit are powered on and enter an initialization mode respectively; and

under the initialization mode, the first receiving unit of the first receiving unit continuously detects a first optical signal through the first input circuit, the first electrical output port of the first receiving unit performs the receiver termination detection at an interval of t0; when a low-impedance receiver termination (R_RX-DC) is detected, the first control unit causes the first output circuit to output the first optical signal and the first transmitting unit to enter a transmission mode; and/or

in response to the second plug being connected to the device, the second transmitting unit and the second receiving unit are powered on and processes the initialization mode respectively; and

under the initialization mode, the second input circuit of the second receiving unit continuously detects whether the first optical signal is transmitted from the first plug, the second electrical output port of the second receiving unit performs the receiver termination detection at an interval of t0; when the low-impedance receiver termination (R_RX-DC) is detected, the second control unit causes the second output circuit to output the first optical signal to inform the first plug that the second plug has been connected to the device, and the second transmitting unit to enter the transmission mode;

wherein the first receiving unit is under the initialization mode, when the first input circuit receives the first optical signal, the first receiving unit processes the transmission mode, the first control unit configures the first electrical input port to the low-impedance receiver termination (R_RX-DC) and informs the host the state of the connection of the device to the second plug;

wherein when the second receiving unit is under the initialization mode, when the second input circuit receives the first optical signal, the second receiving unit enters the transmission mode, the second control unit configures the second electrical input port to the low-impedance receiver termination (R_RX-DC) and informs the device of the connection of the host to the first plug;

the respective operation modes of the first plug and the second plug also comprise a power saving mode;

wherein the first electrical output port of the first plug in the power saving mode performs the receiver termination detection at an interval of t2 and, if the receiver termination is in low-impedance receiver termination, the first control unit causes the first output circuit to emit a second optical signal; and

the second input circuit of the second plug-in the power saving mode conducts polling at an interval of t3, and when the second optical signal is detected, the second plug remains in the power saving mode.