# US 12,761,735 B2 · Virtual reality interface device for thermo-touch haptic feedback > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,761,735 B2 - Document ID: US12761735B2 - Status: Granted - Kind: B2 - Application number: 19/197,875 - Filed: 2025-05-02 - Published: 2026-03-26 - Granted: 2026-10-13 - Earliest claimed: 2024-05-03 - Assignees: Korea University Research and Business Foundation - Applicants: Korea University Research and Business Foundation - Inventors: Youngsu Cha; Seohu Lee - Web page: https://patentgrep.com/patent/US12761735B2 ## CPC - G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user} - G06F 3/011: {Arrangements for interaction with the human body, e.g. for user immersion in virtual reality (blind teaching G09B21/00)} - H10N 10/13: characterised by the heat-exchanging means at the junction - H10N 10/17: characterised by the structure or configuration of the cell or thermocouple forming the device - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract Disclosed are a haptic feedback device and a virtual reality (VR) interface device for simultaneously providing thermo-touch haptic feedback. The haptic feedback device includes a thermal sensation providing unit configured to provide a thermal sensation to a user; a touch sensation providing unit configured to provide a touch sensation to the user; and a fixing device configured to fix at least a portion of the thermal sensation providing unit and at least a portion of the touch sensation providing unit, the thermal sensation providing unit includes a substrate; at least one thermoelectric device (TED) formed on the substrate; and a thermal pad formed on the at least one thermoelectric device (TED), and the touch sensation providing unit includes a base with a hole formed; and a film configured to bond to the base and to elongate according to the air pressure provided through the hole. ## Claims ### Claim 1 A haptic feedback device comprising: a thermal sensation providing unit configured to provide a thermal sensation to a user; a touch sensation providing unit configured to provide a touch sensation to the user, wherein the thermal sensation providing unit is provided on a top surface of the touch sensation providing unit; and a fixing device configured to fix at least a portion of the thermal sensation providing unit and at least a portion of the touch sensation providing unit, wherein the thermal sensation providing unit includes: a substrate; at least one thermoelectric device (TED) formed on the substrate; and a thermal pad formed on the at least one thermoelectric device (TED), and the touch sensation providing unit includes: a base with a hole formed; and a film configured to bond to the base and to elongate according to air pressure provided through the hole. ### Claim 2 (depends on 1) The haptic feedback device of claim 1, wherein: the thermal sensation providing unit and the touch sensation providing unit are in a rectangular parallelepiped shape, the width of the touch sensation providing unit is greater than the width of the thermal sensation providing unit, a first fixing device of the fixing device is in contact with one side of the touch sensation providing unit, a top surface portion of one side of the touch sensation providing unit in an exposed portion of the top surface of the touch sensation providing unit due to absence of the thermal sensation providing unit, and one side of the thermal sensation providing unit, the first fixing device is attached to one side of the touch sensation providing unit and one side of the thermal sensation providing unit, a second fixing device of the fixing device is in contact with an other side of the touch sensation providing unit, a top surface portion of the other side of the touch sensation providing unit in the exposed portion of the top surface of the touch sensation providing unit due to absence of the thermal sensation providing unit, and an other side of the thermal sensation providing unit, the second fixing device is attached to the other side of the touch sensation providing unit and the other side of the thermal sensation providing unit, and the first fixing device and the second fixing device are elastic. ### Claim 3 (depends on 2) The haptic feedback device of claim 2, wherein the thermal sensation providing unit further includes a temperature detector formed between the thermoelectric device and the thermal pad. ### Claim 4 (depends on 2) The haptic feedback device of claim 2, wherein the base of the touch sensation providing unit is made with polydimethylsiloxane (PDMS), and the film is made with a highly elastic thin material. ### Claim 5 (depends on 4) The haptic feedback device of claim 4, wherein the thermal sensation providing unit is formed on the film of the touch sensation providing unit. ### Claim 6 (depends on 5) The haptic feedback device of claim 5, wherein the thermoelectric device (TED) generates heat in response to a control signal received through a wire, the film of the touch sensation providing unit elongates in response to air pressure formed on the base, according to the elongation of the film, the first fixing device and the second fixing device elongate. ### Claim 7 (depends on 1) An interface device comprising: a haptic feedback device of claim 1; a pump configured to provide air pressure to the touch sensation providing unit of the haptic feedback device; and a control unit configured to output a control signal for controlling the thermal sensation providing unit and a control signal for controlling the pump. ### Claim 8 (depends on 7) The interface device of claim 7, wherein: the pump generates air pressure in response to the control signal received from the control unit, and the generated air pressure is provided to the touch sensation control unit through a tube and through the hole in the touch sensation control unit. ### Claim 9 (depends on 7) The interface device of claim 7, wherein the pump includes: a servo motor; an an origami cylinder configured to compress or expand according to an operation of the servo motor.