# US 11,445,621 B2 · Electric-heating apparatus and touch device therein > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,621 B2 - Document ID: US11445621B2 - Status: Granted - Kind: B2 - Application number: 16/507,936 - Filed: 2019-07-10 - Published: 2020-09-17 - Granted: 2022-09-13 - Earliest claimed: 2019-03-15 - Assignees: Delta Electronics, Inc. - Applicants: Delta Electronics, Inc. - Inventors: I-Shen Lin; Sung-Jie Huang; Chih-Kuang Wang - Web page: https://patentgrep.com/patent/US11445621B2 ## CPC - H05K 3/368: {parallel to each other (H05K3/361 takes precedence)} - F24C 7/083: {on tops, hot plates} - F24C 7/086: {touch control} - H05B 1/0202: {Switches} - H05K 1/0274: {Optical details, e.g. printed circuits comprising integral optical means (H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42)} - H01R 12/71: for rigid printing circuits or like structures - H05K 1/18: structurally associated with non-printed electric components (H05K1/16 takes precedence) - H05K 2201/042: Stacked spaced PCBs; Planar parts of folded flexible circuits having mounted components in between or spaced from each other - H05K 2201/09063: Holes or slots in insulating substrate not used for electrical connections - H05K 2201/10106: Light emitting diode [LED] - H05K 2201/10151: Sensor - H05K 2201/10189: Non-printed connector - H05K 2201/2018: Presence of a frame in a printed circuit or printed circuit assembly - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract A touch device is provided. The touch device includes a substrate, a light-emitting element, a light-shielding member, a sensing board, and a light-passing board. The light-emitting element is disposed on the substrate. The light-shielding member is disposed on the substrate, wherein the light-shielding member has a first opening, and the light-emitting element is located in the first opening. The sensing board is disposed on the light-shielding member, and is electrically connected to the substrate. The sensing board has a second opening, and the first opening and the second opening overlap. The light-passing board is disposed on the sensing board, and covers the first opening and the second opening. ## Claims ### Claim 1 A touch device, comprising: a substrate having a top surface and comprising a first connecting member disposed on the top surface of the substrate; a light-emitting element disposed on the top surface of the substrate; a light-shielding member disposed on the top surface of the substrate, wherein the light-shielding member has a first opening, and the light-emitting element is located in the first opening, wherein the light-shielding member is located between the first connecting member and the light-emitting element, and the first connecting member and the light-emitting element are separated by the light-shielding member, thereby the first connecting member is completely blocked from the light-emitting element by the light-shielding member, wherein the light-shielding member further has a hole, the hole and the first opening penetrate on the same plane, and a central axis of the hole is parallel to a central axis of the first opening and perpendicular to said same plane, and the first connecting member is located in the hole; a sensing board, disposed on the light-shielding member, and electrically connected to the substrate via the first connecting member, wherein the sensing board has a second opening, and the first opening and the second opening overlap; and a light-passing board, disposed on the sensing board, covering the first opening and the second opening. ### Claim 2 (depends on 1) The touch device as claimed in claim 1, further comprising a thin film disposed between the sensing board and the light-passing board. ### Claim 3 (depends on 2) The touch device as claimed in claim 2, wherein a pattern is formed on the thin film, and the light emitted by the light-emitting element passes through the thin film and shows the pattern. ### Claim 4 (depends on 1) The touch device as claimed in claim 1, wherein a pattern is formed on the light-passing board, and the light emitted by the light-emitting element passes through the light-passing board and shows the pattern. ### Claim 5 (depends on 1) The touch device as claimed in claim 1, wherein the sensing board further comprises a sensing circuit surrounding the second opening. ### Claim 6 (depends on 5) The touch device as claimed in claim 5, wherein the sensing circuit comprises a plurality of contacts disposed in parallel connection. ### Claim 7 (depends on 1) The touch device as claimed in claim 1, wherein the sensing board comprises a second connecting member, and the first connecting member is electrically connected to the second connecting member. ### Claim 8 (depends on 7) The touch device as claimed in claim 7, wherein the first connecting member is electrically connected to the second connecting member via the hole. ### Claim 9 (depends on 1) The touch device as claimed in claim 1, wherein the sensing board further comprises a first sensing board and a second sensing board, the first sensing board is located inside an opening of the second sensing board and electrically isolated from the second sensing board. ### Claim 10 (depends on 1) The touch device as claimed in claim 1, wherein the light-shielding member includes a first surface and a second surface opposite from the first surface, and the light-emitting element is disposed on a side of the first surface of the light-shielding member, and the first connecting member is provided on a side of the second surface of the light-shielding member. ### Claim 11 (depends on 1) The touch device as claimed in claim 1, wherein the sensing board covers an opening of the hole. ### Claim 12 (depends on 1) The touch device as claimed in claim 1, wherein the sensing board is directly attached to the top surface of the light-shielding member. ### Claim 13 (depends on 1) The touch device as claimed in claim 1, wherein the first opening has a first opening edge contacting the top surface of the substrate and the second opening edge contacting the sensing board, and a size of the second opening edge is substantially the same as a size of the second opening. ### Claim 14 (depends on 1) The touch device as claimed in claim 1, wherein the light-shielding member surrounds an entire body of the first connecting member. ### Claim 15 An electric-heating apparatus, comprising: a body; a heating device disposed in the body; and a touch device, disposed in the body, is configured to control the operating status of the heating device, wherein the touch device comprises: a substrate having a top surface and comprising a first connecting member disposed on the top surface of the substrate; a plurality of light-emitting elements disposed on the top surface of the substrate; a light-shielding member disposed on the top surface of the substrate, wherein the light-shielding member has a plurality of first openings, and the light-emitting elements are correspondingly located in the first openings, wherein the light-shielding member is located between the first connecting member and the light-emitting element, and the first connecting member and the light-emitting element are separated by the light-shielding member, thereby the first connecting member is completely blocked from the light-emitting element by the light-shielding member, wherein the light-shielding member further has a hole, the hole and the first opening penetrate on the same plane, and a central axis of the hole is parallel to a central axis of the first opening and perpendicular to said same plane, and the first connecting member is located in the hole; a sensing board, disposed on the light-shielding member, and electrically connected to the substrate via the first connecting member, wherein the sensing board has a plurality of second openings, and the first openings and the second openings correspondingly overlap; and a light-passing board, disposed on the sensing board, is configured to cover the first openings and the second openings. ### Claim 16 (depends on 15) The electric-heating apparatus as claimed in claim 15, wherein the light-shielding member includes a first surface and a second surface opposite from the first surface, and the light-emitting element is disposed on a side of the first surface of the light-shielding member, and the first connecting member is provided on a side of the second surface of the light-shielding member. ### Claim 17 (depends on 15) The electric-heating apparatus as claimed in claim 15, wherein the sensing board covers an opening of the hole. ### Claim 18 (depends on 15) The electric-heating apparatus as claimed in claim 15, wherein the sensing board is directly attached to the top surface of the light-shielding member. ### Claim 19 (depends on 15) The electric-heating apparatus as claimed in claim 15, wherein the first opening has a first opening edge contacting the top surface of the substrate and the second opening edge contacting the sensing board, and a size of the second opening edge is substantially the same as a size of the second opening. ### Claim 20 (depends on 15) The electric-heating apparatus as claimed in claim 15, wherein the light-shielding member surrounds an entire body of the first connecting member.