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A study on tact-guard using haptic feedback

A study on Tact-Guard using Haptic Feedback

Mr. Yugam Gangar

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Undergraduate student – BSc IT

Narsee Monjee College of Commerce & Economics”,

University of Mumbai”,

Mumbai, Maharashtra, 400056, India

Prof. Dhanraj Jadhav

Assistant Professor-BSc IT

Narsee Monjee College of Commerce & Economics”,

University of Mumbai”,

Mumbai, Maharashtra, 400056, India

Abstract—With increasing demand of touch-based IOT devices and emerging of all fields of industries towards technology and data-centric process, surface haptic feedback is soon to get a lot of attention and will play a significant role in the growth of various IOT devices. In this paper, we introduce a conceptual model of implementing the surface haptic feedback in a new way according to the rising era of data-centric industries. That is, by implementing surface haptic feedback using screen-guards based on data-driven algorithm approach. This paper is a focused study on haptic screen guard which we named as “Tact-guard”, and its application in fields like e-commerce, fashion designing, product designing and interior & architecture designing, and gaming.

Keywords—Haptic Feedback (HF), Surface Haptics (SF), E-commerce, Tact-guard (TG), Touchscreen devices (TD).

I. Introduction

Humans have five different senses through which they interact with different things in the world. The world is getting more and more engaged with many IOT devices day by day, commonly smartphones, tablets, and computers. Interactions with these devices are based on some of our senses like visual sense, auditory sense and touch sense. The visual and auditory sense is much more enhanced in recent years with respect to IOT devices.

Throughout the day we use our smartphones through visual and tactile sense. Visual sensation has emerged a lot with graphical visual manipulation, etc. But there is still a lot of development to be done in the field of tactile sensation. Touch sense is the most powerful sense which we seamlessly use for sensing the texture of various things around us. Using of smartphone devices is bond to visual sense as there is a just flat rigid touchscreen display.

To overcome this limitation the ability of touchscreen interactions is increasing more and more through tactile haptic sensation. Various research have been done to virtually render the haptic texture effect through various types of displays.

Also, online shopping and e-commerce platform is emerging in recent years. But it is still limited to virtual shopping through electronic devices. Consumers need more realism in online shopping. According to a global survey, around 93% of consumers feel the need of emerging e-commerce platform through virtual haptic texture feedback to feel the texture of the objects sold at e-commerce websites. People are more inclined towards buying things with feelings its texture.

Through surface haptic, great level of virtual texture rendering has been made possible on vibrotactile based displays. Though still not perfectly accurate realistic rendering has been achieved through various means. Also, it has still not yet implemented by many smartphone or electronic device manufacturers, as it is still to emerge a lot.

In this paper, we have introduced a new way of implementing surface haptic for rendering tactile feedback through the electrostatic effect. In order to increase the touchscreen capacity in general for almost every possible devices in the market, we have introduced a concept of developing electrostatic based screen guards. Seamless virtual haptic rendering can be done through more enhanced haptic rendering algorithm and electrostatic surface haptic effect on the fingertip through screen guard. This will make available haptic rendering to all touch enabled devices in the market significantly changing the way of interactions with these devices on a huge scale, also helping to grow various fields of designing. This paper focuses on conceptual modelling of haptic screen guard which we named as “Tact-guard”, and its application in fields like e-commerce, fashion designing, product designing and interior & architecture designing, and gaming.

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II. literature review

Touchscreens have been a significant part of the mobile and computing world for user interactions. Along with audio-visual interactions the touch interactions has emerged a lot in recent years. Many kinds of research and experiments have been made in the context of surface haptics for better touch interactions and decreasing the gap between the virtual and real world. A comprehensive review of various approaches for haptic rendering is made with respect to its emerging real-world applications.

D.Meyer[1] in his study compares the electrostatic and ultrasonic haptic rendering through various modelling and experimental results. The experiment was focused on the generation of vibrations causing tactile effect and generation of friction effect on the fingertip which supports the vibration for creating a real textured surface haptic rendering. While the evaluation showed the capability of rendering a wide range of haptics using ultrasonic technique and capability of generating faster haptics on high bandwidth using the electrostatic technique.

Further, in another study, D.Meyer[4] emphasizes on detailing of friction property of haptics rendering with electrostatic force. Due to electrostatic attraction produced by sliding the fingertips on display, it produces friction on the display giving a tactile haptic rendering effect. The study gives an overall detail about the accuracy of haptic feedback with friction. With several testing, analyzation of friction force for haptic feedback is done, concluding friction force with electrostatic give nearly accurate haptic feedback results.

J.Mullenbach[2] gives a detailed study on TPad tablet was intended for creating an affordable, easy to use and open source platform for force based surface haptic interactions. Model of TPad fire tablet was tested and gave successful results of creating haptic interactions through friction variable based vibration haptics, overcoming the limitations of its previous models.

Further J.Mullenbach[3] in his another paper, proposes a new force based haptic device that combines a variable friction device (known as TPad) with an impedance controlled planar mechanism. Through this research, the author focuses on developing force-based feedback and affordances for users of touchscreen interfaces with enhancement of rendering of surface haptic feedback.

M.Munainandy[7] in his research work, has emphasized on implementation and study about the user acceptance of advanced haptic feedback technology in the field of e-commerce. Due to the popularity of online shopping because of its wide variety, all-time availability and other factors, there is a need to develop more in that field. However, one of the major concerns of users is the inability to feel any feedback when a product is selected on any e-commerce platform. So the researchers of this paper developed a testing system consists of questions by designing seven classes of different tactile patterns which consist of different time length, different strength level, and different base effect. After thorough testing, the authors have failed to provide the same experiment for all the users which is essential in deriving a conclusion. However, through distributing surveys among 207 people and collecting data authors analyzed some concrete information on user acceptance of haptic feedback for e-commerce. Resulting from the survey some positive data came out as over 93% of respondents were interested in using haptic-based touchscreen devices, also about 88% people based on age groups on an average accepted to use haptic feedback for e-commerce and approximately 91% of times it proved to be more profitable for users in online purchasing.

As per the research article in “Data-Driven Rendering of Fabric Textures on Electrostatic Tactile Displays”[6], by forming the new electrostatic rendering algorithm through real-world tactile data of texture feeling, a similar perceptual of real-world texture feeling can be rendered. Through this paper, the author J.Jiao evaluates a realistic data-driven haptic texture rendering by doing some psychophysical experiments with a group of people which is based on data-driven texture rendering algorithm using periodic applied voltage signals. The results of experiments show virtual textures generated with the data-driven haptic texture rendering algorithm were similar to the real fabric textures. But as this algorithm was developed and tested based on inputs of real-world bare finger interaction for 10 types of fabrics, further evolution made more realistic haptic texture rendering with large-scale bare finger interaction database.

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In the study done by K.MacLean[5], the author gives an overall idea about the way human tactile operates (human sense), also their capabilities, and other details. The study provides an insight into the sensors involved in human tactile feedback, also how the tactile feedback is performed in coordination with all those senses. Taking into considerations various human constraints and hardware constraints for one hand haptic tactile feedback and comparing different haptic hardware like Force feedback devices & tactile displays the author provides the evaluation of better hardware for realistic haptic rendering.

III. methodology

The tact-guard enhances the capability of current screen guards. The proposed system consists of a haptic screen guard and its supported algorithm for efficient accurate haptic rendering.

There are several layers of different materials in regular screen guard. Tact-guard can be developed by adding a layer of electromagnetic material on top of all layers of regular screen guards (PET / TPU). The guard can be connected to the device through transparent thin silicone wires. The tact-guard will work by taking electrical data inputs from the device and producing a haptic rendering effect by generating vibration based on the provided data. Haptic rendering will be supported by an efficient strong algorithm which will provide data regarding displayed product texture like friction modulating coefficients, the voltage for applying proper vibration, finger positioning, etc.

[image: image1.jpg]

The tact-guard will be placed on top of device screen connected through input mechanism. When the user touches the guard, finger position of the user is sampled and the algorithm will pass the processed haptic data of that position to the tact-guard system. The tact-guard will then generate accurate haptic vibration based on the electric voltage signals. Every time when finger position is changed this process will be carried out seamlessly giving the haptic rendering effect of that position through tact-guard.

The applications supporting haptic feedback will have to integrate the algorithm used for generating haptic data.

IV. Applications

A. E-commerce

In recent years tremendous growth in e-commerce platform has been seen and almost all fields of business are now digitized and growing under one roof of e-commerce. Various new technologies have been implemented to overcome the gap of a virtual world and the real world. The tact-guard technology can play a huge role in changing the way users interact with an e-commerce platform, also dealing the biggest dilemma of tactile feel of various products on e-commerce. As the tact-guard technology will be globally compatible and can be easily implemented in the current market, it may prove as a big step in improving e-commerce.

B. Designing

Use of haptic tact-guard will lead to a new era in the designing world. This technology can be implemented by making use of tact-guard with various touch-based devices in various designing aspects like fashion designing, interior & architecture designing, and product designing in multiple industries. For example, Fabric texture can be felled by multiple fashion designers remotely working on a particular product through tact-guard haptic rendering with touch-enabled devices. Also, this technology can be used by interior & architecture designers to make consumers feel the texture of designed floors or walls.

C. Gaming

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V. conclusion

This paper proposed a new methodology of haptic rendering through touch screen guard which can enable haptic rendering over a huge number of devices present in the market. Further enhancement should be made in the system by implementing it according to industry standards and doing a feasibility study. Hence implementing this system will make some significant changes in technology-based markets and will help them to grow.

Also, this technology will be most convenient to have virtual surface haptics as it can be implemented for making screen guards of all sizes according to every device in a various cost-efficient manner.


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