# US 9,488,342 B2 · Underwater lighting device and underwater electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,488,342 B2 - Document ID: US9488342B2 - Status: Granted - Kind: B2 - Application number: 14/404,327 - Filed: 2014-09-04 - Published: 2016-09-15 - Granted: 2016-11-08 - Earliest claimed: 2013-09-25 - Assignees: Elm - Applicants: ELM Inc. - Inventors: Takakazu Miyahara - Web page: https://patentgrep.com/patent/US9488342B2 ## CPC - H05B 45/20: Controlling the colour of the light - F21S 2/00: Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction - F21S 9/02: the power supply being a battery or accumulator - 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} - F21V 23/02: the elements being transformers, impedances {or power supply units, e.g. a transformer with a rectifier} - F21V 31/005: {Sealing arrangements therefor} - F21V 31/03: with provision for venting {(for vehicle head lights F21S45/33; for vehicle rear lights F21S41/192)} - F21V 31/04: Provision of filling media - G01L 19/12: Alarms or signals - G03B 15/02: Illuminating scene - G03B 15/05: Combinations of cameras with electronic flash apparatus; Electronic flash units - G03B 17/08: Waterproof bodies or housings - H04N 23/51: Housings - F21V 15/00: Protecting lighting devices from damage (protection from thermal damage F21V29/00; gas-tight or water-tight arrangements F21V31/00) - F21Y 2105/18: annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam - F21Y 2115/10: Light-emitting diodes [LED] - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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 ## Abstract Provided is an underwater lighting device and underwater electronic device which are comparatively inexpensive yet durable enough for long-term use. An underwater lighting unit 10, which has an internally provided light source 11 and a gas-tight case 12 with a window 13 for allowing the passage of light from the light source 11, is connected to a land-based unit 30 by a gas-sending tube 40. Air is sent from the land-based unit 30 to the underwater lighting unit 10 to maintain the pressure inside the underwater lighting unit 10 at a value slightly higher than the water pressure at the location. A power line for supplying power to the underwater lighting unit 10 and a signal line for controlling the emission of their light are installed in the gas-sending tube 40. Even if the gas-tight state of one underwater lighting unit 10 is broken, water cannot enter the underwater lighting unit 10. Furthermore, the thereby generated bubbles help users locate the underwater lighting unit 10 in which the gas-tight state has been broken. If a plurality of underwater lighting units 10 are provided, they should preferably be connected in the form of a loop or matrix to the land-based unit 30. ## Claims ### Claim 1 An underwater lighting device, comprising: a) a plurality of underwater lighting units having an internally provided light source and a gas-tight case with a window for allowing passage of light from the light source; b) a gas-sending tube to be connected to an opening provided in the gas-tight case; and c) a gas-supply system for sending gas into the plurality of underwater lighting units, which are connected by the gas-sending tubes in a loop-like form or a matrix-like form, through a gas divider and the gas-sending tubes. ### Claim 2 (depends on 1) The underwater lighting device according to claim 1, wherein, further, a line for supplying electric power from a power source to the light source is passed through the gas-sending tube. ### Claim 3 (depends on 2) The underwater lighting device according to claim 2, comprising a signal superposition circuit for superposing, on the line passed through the gas-sending tube, the signal for controlling an emission of light of the light source. ### Claim 4 (depends on 1) The underwater lighting device according to claim 1, wherein, further, a line for transmitting a signal for controlling an emission of light of the light source is passed through the gas-sending tube. ### Claim 5 (depends on 1) The underwater lighting device according to claim 1, further comprising a pressure sensor, a controller and a pump in the gas-supply system, the controller being configured so as to control an operation of energizing and deactivating the pump based on a detection result obtained by the pressure sensor. ### Claim 6 (depends on 5) The underwater lighting device according to claim 5, wherein the controller generates an alarm in a case where a rate of decrease in a value detected by the pressure sensor is greater than a predetermined value. ### Claim 7 (depends on 6) The underwater lighting device according to claim 6, wherein the controller transmits the alarm to a predetermined external terminal. ### Claim 8 (depends on 5) The underwater lighting device according to claim 5, wherein the controller generates an alarm in a case where the pump is operating for a period of time equal to or longer than a predetermined length of time. ### Claim 9 (depends on 8) The underwater lighting device according to claim 8, wherein the controller transmits the alarm to a predetermined external terminal. ### Claim 10 (depends on 5) The underwater lighting device according to claim 5, wherein the controller generates an alarm in a case where the pump is re-energized within a predetermined period of time after the pump is deactivated. ### Claim 11 (depends on 10) The underwater lighting device according to claim 10, wherein the controller transmits the alarm to a predetermined external terminal. ### Claim 12 An underwater electronic device, comprising: a) a plurality of underwater electronic units having a gas-tight case with a window for allowing passage of light; b) a gas-sending tube to be connected to an opening provided in the gas-tight case; and c) a gas-supply system for sending gas into the plurality of underwater electronic units, which are connected by the gas-sending tubes in a loop-like form or a matrix-like form, through a gas divider and the gas-sending tubes. ### Claim 13 (depends on 12) The underwater electronic device according to claim 12, comprising a camera inside the underwater electronic unit.