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    Calibration techniques in haptic systems
    1.
    发明授权
    Calibration techniques in haptic systems 有权

    公开(公告)号：US11727790B2

    公开(公告)日：2023-08-15

    申请号：US17080840

    申请日：2020-10-27

    申请人： ULTRAHAPTICS IP LTD

    发明人： Thomas Andrew Carter ,  Benjamin John Oliver Long ,  Robert Charles Blenkinsopp

    IPC分类号： H04B3/36 ,  G08B29/20 ,  G06F3/01 ,  G06F3/043 ,  G10K11/32 ,  G10K11/34 ,  G08B6/00

    CPC分类号： G08B29/20 ,  G06F3/016 ,  G06F3/043 ,  G08B6/00 ,  G10K11/32 ,  G10K11/34

    摘要： A system providing various improved calibration techniques for haptic feedback is described. An acoustic field is defined by one or more control points in a space within which the acoustic field may exist. Each control point is assigned an amplitude value equating to a desired amplitude of the acoustic field at the control point. Because complete control of space is not possible, controlling the acoustic field at given points yields erroneous local maxima in the acoustic field levels at other related positions. In relation to mid-air haptic feedback, these can interfere in interactions with the space by creating secondary effects and ghost phenomena that can be felt outside the interaction area. The level and nature of the secondary maxima in the acoustic field is determined by how the space is controlled. By arranging the transducer elements in different ways, unwanted effects on the acoustic field can be limited and controlled.

    Method and Apparatus for Modulating Haptic Feedback
    2.
    发明申请
    Method and Apparatus for Modulating Haptic Feedback 有权

    公开(公告)号：US20230095030A1

    公开(公告)日：2023-03-30

    申请号：US18060525

    申请日：2022-11-30

    申请人： Ultrahaptics IP Ltd

    发明人： Benjamin John Oliver Long ,  Thomas Andrew Carter ,  Sriram Subramanian

    IPC分类号： G06F3/01 ,  G08B6/00

    摘要： The present invention concerns a method and apparatus for the modulation of an acoustic field for providing tactile sensations. A method of creating haptic feedback using ultrasound is provided. The method comprises the steps of generating a plurality of ultrasound waves with a common focal point using a phased array of ultrasound transducers, the common focal point being a haptic feedback point, and modulating the generation of the ultrasound waves using a waveform selected to produce little or no audible sound at the haptic feedback point.

    Mid-Air Haptic Textures
    4.
    发明申请
    Mid-Air Haptic Textures 审中-公开

    公开(公告)号：US20200218354A1

    公开(公告)日：2020-07-09

    申请号：US16734479

    申请日：2020-01-06

    申请人： ULTRAHAPTICS IP LTD

    发明人： David Beattie ,  Rory Clark ,  Adam Harwood ,  Orestis Georgiou ,  Benjamin John Oliver Long ,  Thomas Andrew Carter

    IPC分类号： G06F3/01 ,  G06T7/40 ,  G06T19/00

    摘要： Described is a method for instilling the haptic dimension of texture to virtual and holographic objects using mid-air ultrasonic technology. A set of features is extracted from imported images using their associated displacement maps. Textural qualities such as the micro and macro roughness are then computed and fed to a haptic mapping function together with information about the dynamic motion of the user's hands during holographic touch. Mid-air haptic textures are then synthesized and projected onto the user's bare hands. Further, mid-air haptic technology enables tactile exploration of virtual objects in digital environments. When a user's prior and current expectations and rendered tactile texture differ, user immersion can break. A study aims at mitigating this by integrating user expectations into the rendering algorithm of mid-air haptic textures and establishes a relationship between visual and mid-air haptic roughness.

    Perceptions in a haptic system
    10.
    发明授权
    Perceptions in a haptic system 有权

    公开(公告)号：US11550432B2

    公开(公告)日：2023-01-10

    申请号：US17176899

    申请日：2021-02-16

    申请人： ULTRAHAPTICS IP LTD

    发明人： Thomas Andrew Carter ,  Sue Ann Seah

    IPC分类号： G06F3/043 ,  G06F3/16 ,  H04R1/40 ,  G06F3/01 ,  G08B6/00

    摘要： A system providing various improved perceptions techniques for haptic feedback above interactive surfaces that require no contact with either tools, attachments or the surface itself is described. A range of receptors in a perceiving member which is part of the human body is identified to create substantially uniformly perceivable feedback. A vibration frequency that is in the range of the receptors in the perceiving member is chosen and dynamically altered to create substantially uniformly perceivable feedback throughout the receiving member.