# US 2017/0255268 A1 · Systems and Methods for Friction Displays and Additional Haptic Effects > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0255268 A1 - Document ID: US20170255268A1 - Status: Published application - Kind: A1 - Application number: 15/601,580 - Filed: 2017-05-22 - Published: 2017-09-07 - Earliest claimed: 2009-03-12 - Assignees: Immersion Corporation - Applicants: Immersion Corporation - Inventors: Juan Manuel Cruz-Hernandez; Danny A. Grant - Web page: https://patentgrep.com/patent/US20170255268A1 ## CPC - G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user} - G06F 3/017: {Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883)} - G06F 3/0488: using a touch-screen or digitiser, e.g. input of commands through traced gestures - G06T 15/04: Texture mapping - G06F 3/0346: with detection of the device orientation or free movement in a three-dimensional [3D] space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors - G06F 2200/1637: Sensing arrangement for detection of housing movement or orientation, e.g. for controlling scrolling or cursor movement on the display of an handheld computer - G06F 2203/014: Force feedback applied to GUI - G08B 6/00: Tactile signalling systems, e.g. tactile personal calling systems - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract Systems, methods, and computer program products for providing composite haptic effects are disclosed. One disclosed method includes detecting a touch occurring in a touch area when an object contacts a touch surface and selecting a composite haptic effect to generate in response to the touch, the composite haptic effect including at least one surface-based haptic effect and at least one other effect. Based on the selected composite haptic effect, a first haptic signal can be sent to cause an actuator to vary a coefficient of friction of the touch surface and a second actuator can be caused to provide a second haptic output in addition to the variation in the coefficient of friction. The second haptic signal can be sent to a second actuator or the same actuator(s) used to vary the coefficient of friction can generate the second haptic output. ## Claims ### Claim 1 A system comprising: a sensor configured to detect a touch in a touch area when an object contacts a touch surface; a processor in communication with the sensor and configured to: determine a first haptic effect based in part on data received from the sensor by mapping a location of the touch to a mapping file comprising friction values at locations on the touch surface, the mapping file comprising data associated with multiple layers of a user interface, each layer associated with a state of the user interface, the first haptic effect configured to vary a coefficient of friction of the touch surface; and transmit a first haptic signal associated with the first haptic effect; a first haptic output device in communication with the processor and configured to receive the first haptic signal and output the first haptic effect; ### Claim 2 (depends on 1) The system of claim 1, further comprising a second haptic output device, and wherein the processor is further configured to determine a second haptic effect and transmit a second haptic signal associated with the second haptic effect to the second haptic output device. ### Claim 3 (depends on 2) The system of claim 2, wherein the first haptic output device comprises a piezoelectric actuator, and wherein the second haptic output device comprises one or more of: a piezoelectric actuator, a shape memory alloy, an electroactive polymer, a composite piezoelectric actuator, an electromagnetic actuator, an eccentric rotational mass actuator, a linear resonant actuator, or a voice coil actuator. ### Claim 4 (depends on 3) The system of claim 3, wherein the first haptic effect is configured to vary the coefficient of friction on the touch surface to simulate a background texture, and the second haptic effect is configured to simulate a feature overlaying the background texture. ### Claim 5 (depends on 3) The system of claim 3, wherein the mapping file comprises a plurality of values, including a first value used to generate the first haptic signal and a second value used to generate the second haptic signal. ### Claim 6 (depends on 1) The system of claim 1, wherein the processor is further configured to determine a pressure of the touch based on data from the sensor, and wherein the first haptic effect is determined based at least in part on the pressure of the touch. ### Claim 7 (depends on 1) The system of claim 1, further comprising a display, the display comprising a plurality of pixels and defining a display area, the display configured to output an image based at least in part on a display signal, and wherein the touch surface corresponds to the display or a material above the display. ### Claim 8 (depends on 7) The system of claim 7, wherein the mapping file further comprises data associated with the plurality of pixels. ### Claim 9 (depends on 1) The system of claim 1, wherein varying the coefficient of friction of the touch surface comprises increasing the coefficient of friction of the touch surface. ### Claim 10 A method comprising: receiving a sensor signal from a sensor configured to detect a touch in a touch area when an object contacts a touch surface; determining a first haptic effect based in part on the sensor signal by mapping a location of the touch to a mapping file comprising friction values at locations on the touch surface, the mapping file comprising data associated with multiple layers of a user interface, each layer associated with a state of the user interface, the first haptic effect configured to vary a coefficient of friction of the touch surface; and transmitting a first haptic signal associated with the first haptic effect to a first haptic output device ### Claim 11 (depends on 10) The method of claim 10, further comprising determining a second haptic effect and transmitting a second haptic signal associated with the second haptic effect to a second haptic output device. ### Claim 12 (depends on 11) The method of claim 11, wherein the first haptic output device comprises a piezoelectric actuator, and wherein the second haptic output device comprises one or more of: a piezoelectric actuator, a shape memory alloy, an electroactive polymer, a composite piezoelectric actuator, an electromagnetic actuator, an eccentric rotational mass actuator, a linear resonant actuator, or a voice coil actuator. ### Claim 13 (depends on 12) The method of claim 12, wherein the first haptic effect is configured to vary the coefficient of friction on the touch surface to simulate a background texture, and the second haptic effect is configured to simulate a feature overlaying the background texture. ### Claim 14 (depends on 12) The method of claim 12, wherein the mapping file comprises a plurality of values, including a first value used to generate the first haptic signal and a second value used to generate the second haptic signal. ### Claim 15 (depends on 10) The method of claim 10, further comprising determining a pressure of the touch based on data from the sensor, and wherein the first haptic effect is determined based at least in part on the pressure of the touch. ### Claim 16 (depends on 10) The method of claim 10, wherein varying the coefficient of friction of the touch surface comprises increasing the coefficient of friction of the touch surface. ### Claim 17 A non-transitory computer readable medium embodying program code executable by a processor, the program code, when executed, configured to cause the processor to: receive a sensor signal from a sensor configured to detect a touch in a touch area when an object contacts a touch surface; determine a first haptic effect based in part on the sensor signal by mapping a location of the touch to a mapping file comprising friction values at locations on the touch surface, the mapping file comprising data associated with multiple layers of a user interface, each layer associated with a state of the user interface, the first haptic effect configured to vary a coefficient of friction of the touch surface; and transmit a first haptic signal associated with the first haptic effect to a first haptic output device. ### Claim 18 (depends on 17) The non-transitory computer readable medium of claim 17, further comprising program code, which when executed by processor is configured to cause the processor to: determine a second haptic effect and transmitting a second haptic signal associated with the second haptic effect to a second haptic output device. ### Claim 19 (depends on 18) The non-transitory computer readable medium of claim 18, wherein the first haptic output device comprises a piezoelectric actuator, and wherein the second haptic output device comprises one or more of: a piezoelectric actuator, a shape memory alloy, an electroactive polymer, a composite piezoelectric actuator, an electromagnetic actuator, an eccentric rotational mass actuator, a linear resonant actuator, or a voice coil actuator. ### Claim 20 (depends on 17) The non-transitory computer readable medium of claim 17, wherein varying the coefficient of friction of the touch surface comprises increasing the coefficient of friction of the touch surface.