# US 11,994,273 B1 · Light fixture with redundancy protection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,994,273 B1 - Document ID: US11994273B1 - Status: Granted - Kind: B1 - Application number: 18/240,785 - Filed: 2023-08-31 - Granted: 2024-05-28 - Earliest claimed: 2023-03-31 - Assignees: Guangzhou Haoyang Electronic Co., Ltd. - Applicants: Guangzhou Haoyang Electronic Co., Ltd. - Inventors: Yingru Peng; Weikai Jiang; Weiliang Chen; Wenfeng Chen; Zhiguang Liang - Web page: https://patentgrep.com/patent/US11994273B1 ## CPC - F21V 21/108: Arms - F21V 14/006: {by means of optical elements, e.g. films, filters or screens, being rolled up around a roller} - F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) - F21V 23/003: {the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array} - F21W 2131/406: for theatres, stages or film studios - F21Y 2115/30: Semiconductor lasers - Y02B 20/40: Control techniques providing energy savings, e.g. smart controller or presence detection - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - 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 A light fixture with redundancy protection includes a light head with a light source inside, a driving mechanism for driving the light head to change the projection direction, an angle detector for detecting the projection direction of the light head, and an original micro-control unit and a redundancy micro-control unit both being coupled to a controller. The original micro-control unit serves to receive an angle control signal from the controller and forward same to the driving mechanism, the redundancy micro-control unit serves to receive the angle control signal from the original micro-control unit or the controller, and both the original micro-control unit and the redundancy micro-control unit are coupled to the angle detector. A safety protection unit coupled to the controller is further included which is for conducting safety protection actions according to a feedback signal from the original micro-control unit or from the redundancy micro-control unit. ## Claims ### Claim 1 A light fixture with redundancy protection, comprising a light head with a light source inside, a driving mechanism for driving the light head to change a projection direction thereof, an angle detector for detecting the projection direction of the light head, an original micro-control unit and a redundancy micro-control unit, both being coupled to a controller, wherein the original micro-control unit is configured to receive an angle control signal from the controller and forward same to the driving mechanism, the redundancy micro-control unit is configured to receive the angle control signal from the original micro-control unit or the controller, and both the original micro-control unit and the redundancy micro-control unit are connected to the angle detector; and a safety protection unit coupled to the controller, which is configured to conduct safety protection actions according to a feedback signal from the original micro-control unit or a feedback signal of the redundancy micro-control unit. ### Claim 2 (depends on 1) The light fixture according to claim 1, further comprising a support arm for supporting the light head to rotate and a base for supporting the support arm to rotate, the driving mechanism is configured to drive the light head and/or the support arm to rotate, and the angle detector is configured to detect the rotation angle of the light head and/or the support arm. ### Claim 3 (depends on 2) The light fixture according to claim 2, wherein the angle detector is attached to a rotation axis of the light head or a rotation axis of the support arm. ### Claim 4 (depends on 1) The light fixture according to claim 1, wherein at least one effect module of a light shading module, a light filtering module, a gobo module, a color filter module, a light shaping module, a focusing module, a prism module, a light homogenizing module, or a magnifying module for changing lighting effects is further arranged in the light head. ### Claim 5 (depends on 4) The light fixture according to claim 4, wherein the safety protection unit is designed to be a driving unit of the effect module. ### Claim 6 (depends on 5) The light fixture according to claim 5, wherein an output end of both the original micro-control unit and the redundancy micro-control unit is coupled to the controller. ### Claim 7 (depends on 1) The light fixture according to claim 1, further comprising a current detection unit for detecting current of the light source, which is coupled to the redundancy micro-control unit or the controller. ### Claim 8 (depends on 7) The light fixture according to claim 7, wherein the safety protection unit is designed to be a driving unit of the light source. ### Claim 9 (depends on 8) The light fixture according to claim 8, wherein the redundancy micro-control unit is in direct communication with the safety protection unit, or an output end of both the original micro-control unit and the redundancy micro-control unit is in direct communication with the safety protection unit through an NOR gate. ### Claim 10 (depends on 1) The light fixture according to claim 1, wherein the angle detector is in form of a photoelectric encoder, a magnetic encoder, an inductance encoder or a capacitance encoder. ### Claim 11 (depends on 1) The light fixture according to claim 1, wherein the driving mechanism is in form of a stepping motor. ### Claim 12 (depends on 1) The light fixture according to claim 1, wherein the light source is of a laser type.