An electrostatic force and vibration fusion tactile reproduction device and method using a finger pad

Abstract

The invention belongs to the field of man-machine interaction and relates to a finger-pad-applying electrostatic force and vibration integrated tactile representation device and method. The device comprises a positioning unit, a tactile processing unit and a finger pad unit. The tactile representation method includes that the positioning unit acquires position information of a finger pad on a multimedia terminal screen in real time; the tactile processing unit processes the position information of the finger pad, generates electrostatic force driving signal amplitude parameters and vibration driving signal amplitude parameters and transmits to the finger pad unit wirelessly; the finger pad unit inputs generated electrostatic force driving signals and vibration driving signals into an electrostatic screen and a vibration source to generate electrostatic force and vibration respectively, and thus, finger skin deforms to make fingers of a user sense tactile feedback. The device and the method have advantages that in a planar interaction process, tangential feedback force and normal feedback force applied to fingers can be changed at the same time, and accordingly real tactile sense can be achieved, and high portability and multi-point tactile feedback can be realized.

Description

technical field [0001] The invention belongs to the field of virtual reality and human-computer interaction, and in particular relates to a tactile reproduction device and method. Background technique [0002] The multimedia terminal with tactile reproduction function is a research hotspot in the world in recent years, and has important application prospects in the fields of e-commerce, education and entertainment, and the visually impaired. The multimedia tactile reproduction terminal can allow users to perceive the shape, texture and softness of the displayed object through touch, and push the communication between human beings and the virtual world to a new stage of fusion of hearing, vision and touch, which will generate huge economic benefits. [0003] At present, there are already some devices and methods for realizing tactile reproduction. [0004] Chinese patent "A wearable haptic interaction device with finger exoskeleton facing touch screen" (application number 20...

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Problems solved by technology

[0004] Chinese patent "A wearable haptic interaction device with finger exoskeleton facing touch screen" (application number 201610900663.8) discloses a wearable haptic interaction device with finger exoskeleton facing touch screen, which can provide multi-mode force for human fingers sensory and vibratory tactile feedback, this device has a complex structure and is not easy to integrate, which has great limitations

The Chinese patent "An Ultrasonic Tactile Feedback System and Its Manufacturing Method" (Application No. 201510266849.8) discloses an ultrasonic tactile feedback system based on a capacitive ultrasonic sensor, which generates tactile feedback by focusing sound waves on a certain point in space. The tactile sensation generated by the reproduction device is very weak, and the structure is complicated, it is not easy to integrate, and the portability is poor

[0005] The Chinese patent "A device for tactile reproduction based on electrostatic force" (application number 201210143828.3) discloses a tactile reproduction technology based on electrostatic force. The finger tracking unit detects the position of the finger on the tactile sense, and corresponds to the tactile force according to the electrical signal. relationship, generate electrical signal parameters representing the corresponding tactile force, but can only achieve single-point tactile reproduction, poor portability

The Chinese patent "A self-adaptive multi-point electrostatic force tactile reproduction device using impedance detection" (application number 201420098225.0) discloses a method and device based on electrostatic force tactile reproduction. Although it can realize multi-point tactile feedback, it can only change The tangential friction force on the finger cannot change the normal force on the finger, and the tactile feedback can only be felt when the finger is in a moving state. The real tactile effect presented is poor and the portability is poor.

However, array-based tactile reproduction devices are complex in structure, poor in portability, and difficult to integrate on multimedia terminals. Electrostatic force tactile reproduction devices can only provide tangential feedback force changes, and there is no tactile feedback when the finger is stationary, and vibration The tactile reproduction device can only provide normal feedback force changes, the tactile feeling is single, and the authenticity is poor

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