# US 11,452,185 B2 · Lighting apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,185 B2 - Document ID: US11452185B2 - Status: Granted - Kind: B2 - Application number: 17/212,668 - Filed: 2021-03-25 - Published: 2021-09-30 - Granted: 2022-09-20 - Earliest claimed: 2021-03-25 - Assignees: Xiamen Leedarson Lighting Co., Ltd - Applicants: Xiamen Leedarson Lighting Co., Ltd - Inventors: Wei Liu; Qiqiang Lin; Yibin Chen; Fujie Chen - Web page: https://patentgrep.com/patent/US11452185B2 ## CPC - H05B 45/14: using electrical feedback from LEDs or from LED modules - H05B 45/31: Phase-control circuits - H05B 45/325: Pulse-width modulation [PWM] - H05B 45/345: Current stabilisation; Maintaining constant current - H05B 45/37: Converter circuits - H05B 47/19: via wireless transmission - H05B 45/20: Controlling the colour of the light - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract The lighting apparatus includes a LED module, a constant current source, a bridge rectifier, a silicon-controlled rectifier, a wireless module and a detector. The lighting apparatus receives an alternating current power to generate a light. The constant current source provides a driving current to the LED module. The bridge rectifier converts the alternating current power of a first frequency to a direct current power with a second frequency. The second frequency is two times of the first frequency. The silicon-controlled rectifier is connected to the alternating current power and the bridge rectifier for adjusting the direct current power with a chopping signal. The wireless module receives an external control signal. The detector generates a dimming control signal supplied to the constant current source to adjust the driving current according to both the external control signal and the chopping signal. ## Claims ### Claim 1 A lighting apparatus for receiving an alternating current power, comprising: a LED module; a constant current source providing a driving current to the LED module; a bridge rectifier for converting the alternating current power of a first frequency to a direct current power with a second frequency, wherein the second frequency is two times of the first frequency; a silicon-controlled rectifier connected to the alternating current power and the bridge rectifier for adjusting the direct current power with a chopping signal; a wireless module for receiving an external control signal; and a detector for generating a dimming control signal supplied to the constant current source to adjust the driving current according to both the external control signal and the chopping signal, wherein the detector converted the chopping signal to the wireless module to generate a status signal sent to an external device, wherein the external device generates the external control signal based on the status signal, the external control signal has a set of commands sent to the detector. ### Claim 2 (depends on 1) The lighting apparatus of claim 1, further comprising a DC-DC converter for converting the direct current power source to a constant direct current supplied to the constant current source. ### Claim 3 (depends on 1) The lighting apparatus of claim 1, wherein the silicon-controlled rectifier is a TRIAC device, and the chopping signal is a TRIAC signal corresponding to a conductive angle for conducting a ratio of a current of the bridge rectifier. ### Claim 4 (depends on 1) The lighting apparatus of claim 1, wherein the dimming control signal is a PWM signal for adjusting the driving current based on a duty ratio of the PWM signal. ### Claim 5 (depends on 1) The lighting apparatus of claim 1, further comprising a power supply for providing a working power to the wireless module and the detector. ### Claim 6 (depends on 1) The lighting apparatus of claim 1, wherein the detector has a priority setting for determining a priority order between the external control signal and the chopping signal. ### Claim 7 (depends on 6) The lighting apparatus of claim 6, wherein the priority setting controls the detector to output the dimming control signal completely based on the external control signal. ### Claim 8 (depends on 6) The lighting apparatus of claim 6, wherein the detector determines the dimming control signal according to the chopping signal with a ratio determined by the external control signal. ### Claim 9 (depends on 6) The lighting apparatus of claim 6, wherein when the external control signal is not received, the detector uses the chopping signal to determine the dimming control signal. ### Claim 10 (depends on 6) The lighting apparatus of claim 6, further comprising a manual switch connected to the detector for changing the priority setting. ### Claim 11 (depends on 1) The lighting apparatus of claim 1, wherein the chopping signal is converted to a digital value by the detector to determine the dimming control signal. ### Claim 12 (depends on 11) The lighting apparatus of claim 11, wherein the digital value corresponding to multiple control values respectively corresponding to multiple LED devices of the LED module to generate a mixed light. ### Claim 13 (depends on 12) The lighting apparatus of claim 12, wherein the multiple LED devices have different color temperatures, and a mixed color temperature of the mixed light is adjusted by changing the multiple control values. ### Claim 14 (depends on 13) The lighting apparatus of claim 13, wherein the driving current includes multiple sub driving currents respectively supplied to the multiple LED devices. ### Claim 15 (depends on 1) The lighting apparatus of claim 1, wherein the detector determines the dimming control signal based on the set of commands to generate multiple sub driving currents to multiple LED devices of the LED module. ### Claim 16 (depends on 15) The lighting apparatus of claim 15, wherein different chopping signals correspond to different set of commands, the external device references a table to perform the mapping between the status signal and the set of commands. ### Claim 17 (depends on 1) The lighting apparatus of claim 1, wherein the external control signal has a value to disable reference to the chopping signal of the detector. ### Claim 18 (depends on 1) The lighting apparatus of claim 1, wherein the wireless module has a detachable antenna module and a wireless processor, the detachable antenna module is replaced with a different detachable antenna module to change a different wireless protocol but with the same wireless processor.