Different approaches to large tactile screens suitable for graphics

Fricke, Jenny

doi:10.1049/ic:19970085

Cited by 3 publications

(3 citation statements)

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“…The cost barriers show that none of these micro actuators technology is economically good enough, to be implemented in high resolution and large scale displacement tactile graphics displays that are explored with the finger. Therefore, there is still a great attention in new micro actuators technology which could allow a more inventive functioning in terms of operability, manufacturing process, integration, performance and cost [6][7][8][9]. There are a wide variety of prospective and most of the activities were focused on electrical simulation, which is an old idea but it has not got the desired results yet [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

An Innovative Tactile Interactive Interface Graphical Display for the Visually Impaired Information Technology Access Applications

Shafik

2013

AMM

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This paper presents an innovative tactile interactive interface graphical display for visually impaired people, information technology (IT) access application. The display consists of matrix of dots. Each dot is an electro rheological fluid micro actuator. The micro-actuator designed based on linear vertical movement principles. The actuator design and development process is presented in this paper. An advanced software tools and embedded system based on voltage matrix manipulation are developed to provide the display near real time control. Prototype size 124x4 dots, on a matrix form, of 2.54mm pitch, was manufactured. The experimental tests carried out into the prototype showed that each actuator of the matrix was able to provide a vertical holding force of 100 to 200 mN and vertical movement of 0.7 mm. The stroke and dynamic response tests showed the practicability of the developed micro actuation system, for tactile display IT access applications.

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Section: Introductionmentioning

confidence: 99%

An Innovative Tactile Interactive Interface Graphical Display for the Visually Impaired Information Technology Access Applications

Shafik

2013

AMM

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“…There is a wide range of possibilities, but most work is done in electrical stimulation [6] [7], SMA (shape memory alloy) actuators [8] [9], pneumatic [10], based on ER (electrorheological) fluids and organic gels [11] [12] or based on MEMS (Micro-Electro-Mechanical Systems) [13] [14]. Electrical stimulation is an old idea but it has not got yet the desired results, although advances have recently achieved [7].…”

Section: Introductionmentioning

confidence: 99%

“…The response of the ER fluids is fast (in the milliseconds range) but the resolution and stroke are poor. A pneumatic display based on these fluids has been proposed and seems to improve the performance of previous approaches [11]. Finally, an interesting proposal is reported in [15], where a vibrotactile display is presented that is based on electromagnet actuators with microcoils implemented in multi layer PCB (Printed Circuit Board) technology.…”

Section: Introductionmentioning

confidence: 99%

<title>Thermopneumatic actuator for tactile displays and smart actuation circuitry</title>

2005

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This paper presents a thermopneumatic actuator to build large tactile displays as well as a smart activation circuitry to study and improve its performance. Since the main drawback of large tactile screens in the market is their cost (45000$ the device reported in [1]), this proposal is intended to reduce the price because of the simplicity of the actuator and the potential low cost assembling. A small display with 4 x 4 taxels and 2.54mm of distance between centres has been built to show the viability of the proposal. Furthermore, a smart actuation strategy is implemented where the heater element (a diode) is also used as sensor in a feedback control loop that improves the dynamic response. Such strategy consists in sensing the voltage drop in the diode to measure its temperature, thus it can be heated up quickly without being destroyed because power supply is decreased once the target temperature is reached. We have measured rise times around 2 seconds and fall times around 4 seconds, while the maximum force and stroke are above 10grams (0.1N) and 1mm respectively. The obtained results are good, specially to implement a large tactile screen. Power consumption is high, but it could be lower if latching mechanisms are used to keep the taxel active without power supply.

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Analysis of Product Architectures of Pin Array Technologies for Tactile Displays

Bhatnagar,

Higgins,

Marquardt

et al. 2023

Proc. ACM Hum.-Comput. Interact.

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Refreshable tactile displays based on pin array technologies have a significant impact on the education of children with visual impairments, but they are prohibitively expensive. To better understand their design and the reason for the high cost, we created a database and analyzed the product architectures of 67 unique pin array technologies from literature and patents. We qualitatively coded their functional elements and analyzed the physical parts that execute the functions. Our findings highlight that pin array surfaces aim to achieve three key functions, i.e., raise and lower pins, lock pins, and create a large array. We also contribute a concise morphological chart that organises the various mechanisms for these three functions. Based on this, we discuss the reasons for the high cost and complexity of these surface haptic technologies and infer why larger displays and more affordable devices are not available. Our findings can be used to design new mechanisms for more affordable and scalable pin array display systems.

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Different approaches to large tactile screens suitable for graphics

Cited by 3 publications

References 0 publications

An Innovative Tactile Interactive Interface Graphical Display for the Visually Impaired Information Technology Access Applications

An Innovative Tactile Interactive Interface Graphical Display for the Visually Impaired Information Technology Access Applications

<title>Thermopneumatic actuator for tactile displays and smart actuation circuitry</title>

Analysis of Product Architectures of Pin Array Technologies for Tactile Displays

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