# US 11,122,665 B1 · Protective device and method of lighting assembly, lighting assembly and protective method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,665 B1 - Document ID: US11122665B1 - Status: Granted - Kind: B1 - Application number: 17/032,095 - Filed: 2020-09-25 - Granted: 2021-09-14 - Earliest claimed: 2020-09-25 - Assignees: Shaanxi Wasentech Intelligent Electric Co., Ltd. - Applicants: Shaanxi Wasentech Intelligent Electric Co., Ltd. - Inventors: Dengfeng He - Web page: https://patentgrep.com/patent/US11122665B1 ## CPC - H05B 45/357: specially adapted for retrofit LED light sources - H05B 45/50: responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits - F21K 9/278: Arrangement or mounting of circuit elements integrated in the light source - F21V 23/003: {the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array} - F21Y 2115/10: Light-emitting diodes [LED] - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Disclosed is a protective device of a lighting assembly, the lighting assembly comprising at least one LED, a first end lamp base and a second end lamp base, and the protective device including a first detecting module and a second detecting module and a driving module. The first detecting module and the second detecting are configured to detect a connection state of the first end lamp base to output a first detecting signal, and a connection state of the second end lamp base to output a second detecting signal. The driving module is connected to the at least one LED and configured to control the at least one LED to work based on the first detecting signal and the second detecting signal. The present disclosure also discloses a lighting assembly including the protective device and a protective method of the lighting assembly. ## Claims ### Claim 1 A protective device of a lighting assembly for preventing electric shock and preventing a lamp tube from working when the lamp tube is installed incorrectly, the lighting assembly comprising at least one LED, a first end lamp base and a second end lamp base, the first end lamp base comprises a first pin and a second pin, the second end lamp base comprises a third pin and a fourth pin, and the protective device comprising: a first detecting module and a second detecting module respectively configured to detect a connection state between the first pin and the second pin to output a first detecting signal, and a connection state between the third pin and the fourth pin to output a second detecting signal; and a driving module connected to the at least one LED and configured to control the at least one LED to work based on the first detecting signal and the second detecting signal, wherein the driving module comprises a control switch, and the control switch is turned on or turned off to control the at least one LED to work or not, the driving module further comprises a trigger circuit, the trigger circuit is connected to the control switch to control turning on or turning off the control switch based on a control signal generated by the first detecting signal and the second detecting signal, the trigger circuit comprises a first switch, a second switch and a third switch, a first terminal of the first switch is configured to receive the first detecting signal, a first terminal of the second switch is configured to receive the second detecting signal, a first terminal of the third switch is connected to a second terminal of the first switch and a second terminal of the second switch, and a second terminal of the third switch is connected to a driving terminal of the control switch. ### Claim 2 (depends on 1) The protective device of claim 1, wherein the first detecting module comprises a first capacitor connected with the first pin and the second pin to detect whether there is current signal through the first capacitor. ### Claim 3 (depends on 2) The protective device of claim 2, wherein in response to there being no current signal through the first capacitor, the first end lamp base is in disconnected state and the first detecting signal is low level, in response to there being current signal through the first capacitor, the first end lamp base is in conductive state and the first detecting signal is high level or pulse. ### Claim 4 (depends on 1) The protective device of claim 1, wherein the second detecting module comprises a second capacitor connected with the third pin and the fourth pin to detect whether there is current signal through the second capacitor. ### Claim 5 (depends on 4) The protective device of claim 4, wherein in response to there being no current signal through the second capacitor, the second end lamp base is in disconnected state and the second detecting signal is low level, in response to there being current signal through the second capacitor, the second end lamp base is in conductive state and the second detecting signal is high level or pulse. ### Claim 6 (depends on 1) The protective device of claim 1, wherein in response to the first detecting signal and the second detecting signal being both high levels or pulses, the control switch is turned on to control the at least one LED to work, and in response to at least one of the first detecting signal and the second detecting signal being low level, the control switch is turned off to control the at least one LED not to work. ### Claim 7 (depends on 1) The protective device of claim 1, wherein in response to the first detecting signal and the second detecting signal being both high levels or pulses, the first switch and the second switch are turned on, the third switch is turned off, and the control switch is turned on. ### Claim 8 (depends on 1) The protective device of claim 1, wherein in response to at least one of the first detecting signal and the second detecting signal being low level, at least one of the first switch and the second switch is turned off, the third switch is turned on, and the control switch is turned off. ### Claim 9 (depends on 1) The protective device of claim 1, wherein the driving module further comprises a delay circuit configured to turn on the control switch within a preset time after power-on. ### Claim 10 (depends on 9) The protective device of claim 9, wherein in response to at least one of the first detecting signal and the second detecting signal being low level, the delay circuit is reset. ### Claim 11 A lighting assembly comprising a protective device, the lighting assembly comprising at least one LED, a first end lamp base and a second end lamp base, the first end lamp base comprises a first pin and a second pin, the second end lamp base comprises a third pin and a fourth pin, and the protective device comprising: a first detecting module and a second detecting module respectively configured to detect a connection state between the first pin and the second pin to output a first detecting signal, and a connection state between the third pin and the fourth pin to output a second detecting signal; and a driving module connected to the at least one LED and configured to control the at least one LED to work based on the first detecting signal and the second detecting signal, wherein the driving module comprises a control switch, and the control switch is turned on or turned off to control the at least one LED to work or not, the driving module further comprises a trigger circuit, the trigger circuit is connected to the control switch to control turning on or turning off the control switch based on a control signal generated by the first detecting signal and the second detecting signal, the trigger circuit comprises A first switch, a second switch and a third switch, a first terminal of the first switch is configured to receive the first detecting signal, a first terminal of the second switch is configured to receive the second detecting signal, a first terminal of the third switch is connected to a second terminal of the first switch and a second terminal of the second switch, and a second terminal of the third switch is connected to a driving terminal of the control switch. ### Claim 12 (depends on 1) A protective method of a lighting assembly by using the protective device of claim 1, the lighting assembly comprising at least one LED, a first end lamp base and a second end lamp base, the first end lamp base comprises a first pin and a second pin, the second end lamp base comprises a third pin and a fourth pin, and the protective device comprising: detecting a connection states between the first pin and the second pin to output a first detecting signal and detecting a connection state between the third pin and the fourth pin to output a second detecting signal; and controlling the at least one LED to work based on the first detecting signal and the second detecting signal.