# US 11,909,231 B2 · Charging pad > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,231 B2 - Document ID: US11909231B2 - Status: Granted - Kind: B2 - Application number: 17/808,222 - Filed: 2022-06-22 - Published: 2022-12-29 - Granted: 2024-02-20 - Earliest claimed: 2021-06-24 - Assignees: Prime Planet Energy & Solutions, Inc. - Applicants: Prime Planet Energy & Solutions, Inc. - Inventors: Atsushi Sugihara; Shizuka Masuoka; Kodai Nagano - Web page: https://patentgrep.com/patent/US11909231B2 ## CPC - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H02J 7/731: {specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence)} - H02J 50/005: {Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices} - H02J 50/10: using inductive coupling - Y02E 60/10: Energy storage using batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A charging pad includes a side surface on which a charged terminal device is to be placed face to face. The side surface includes a protruding flat surface portion that is raised from a peripheral edge portion, a power transfer coil that is incorporated in a raised region of the protruding flat surface portion, and a holding mechanism that allows the charged terminal device at a predetermined position with respect to the power transfer coil. ## Claims ### Claim 1 A charging pad comprising: a side surface on which a charged terminal device is to be placed face to face, the side surface comprising: a protruding flat surface portion raised from a peripheral edge portion of the protruding flat surface portion that is inset from a peripheral edge portion of the side surface; a power transfer coil incorporated in a raised region of the protruding flat surface portion; and a holding mechanism allowing the charged terminal device to be held to a predetermined position with respect to the power transfer coil, wherein: the outer peripheral edge of the side surface is substantially rectangular in shape and includes one side that is rounded with a greater radius between the side surface and an intersecting end surface of the charging pad than radii of intersection between the other three sides of the outer peripheral edge of the side surface and respective end surfaces of the charging pad, and the charging pad further comprises a light emitting unit disposed at the peripheral edge portion of the side surface except for along the one side that is rounded with a greater radius between the side surface and the intersecting end surface of the charging pad, wherein the light emitting unit extends part way down along each of opposing end surfaces of the charging pad at each of the opposing ends of the one side so as to be visible when the charged terminal device is placed on the protruding flat surface portion of the side surface. ### Claim 2 (depends on 1) The charging pad according to claim 1, wherein the holding mechanism comprises a built-in magnet. ### Claim 3 (depends on 2) The charging pad according to claim 2, wherein the magnet is disposed in the protruding flat surface portion. ### Claim 4 (depends on 1) The charging pad according to claim 1, wherein the light emitting unit is configured to change a light emission pattern when the power transfer coil is positioned in a face-to-face relationship with a non-contact charging coil of the charged terminal device. ### Claim 5 (depends on 1) The charging pad according to claim 1, wherein the light emitting unit is configured to change a light emission pattern when charging starts. ### Claim 6 (depends on 1) The charging pad according to claim 1, wherein the light emitting unit is configured to change a light emission pattern when charging ends. ### Claim 7 (depends on 1) The charging pad according to claim 1, wherein the side surface is in a substantially rectangular shape, and the light emitting unit is disposed along the peripheral edge portion except for one side of the rectangular shape. ### Claim 8 (depends on 7) The charging pad according to claim 7, wherein the peripheral edge portion of the side surface includes a rounded portion having a radius, and the radius is greater in a region where the light emitting unit is not disposed than in a region where the light emitting unit is disposed. ### Claim 9 (depends on 7) The charging pad according to claim 7, wherein the light emitting unit extends along an edge that is along a height axis orthogonal to the side surface at opposing ends of the one side of the rectangular shape where the light emitting unit is not disposed. ### Claim 10 (depends on 1) The charging pad according to claim 1, wherein the protruding flat surface portion has a rotationally symmetrical shape. ### Claim 11 (depends on 10) The charging pad according to claim 10, wherein the protruding flat surface portion is in a substantially square shape. ### Claim 12 (depends on 1) The charging pad according to claim 1, wherein the protruding flat surface portion is raised from the side surface by a height that is in a range from 1 mm to 10 mm. ### Claim 13 (depends on 1) The charging pad according to claim 1, wherein length and width dimensions of the protruding flat surface portion are smaller than respective length and width dimensions of the charged terminal device such that the protruding flat surface portion is configured to contact a portion of the face of the charged terminal device that is smaller than the entire face of the charged terminal device. ### Claim 14 (depends on 1) The charging pad according to claim 1, wherein the one side of the outer peripheral edge of the side surface that is rounded with a greater radius than the other three sides of the outer peripheral edge of the side surface is configured to allow the charged terminal device to be smoothly slid along the greater radius into contact with the side surface from a lower position on the intersecting end surface than when the charged terminal device is brought into contact with the side surface from any of the other respective end surfaces. ### Claim 15 (depends on 1) The charging pad according to claim 1, wherein the entire charging pad is covered with a transparent cover material. ### Claim 16 (depends on 15) The charging pad according to claim 15, wherein the transparent cover material comprises an acrylic resin.