Design of Braille Display System Based on Piezoelectric Actuator Array

2012 ◽  
Vol 201-202 ◽  
pp. 625-629
Author(s):  
Xiao Liang ◽  
Guo Ping Li ◽  
Zhi Ming Xu
Keyword(s):  
Piezoelectric Actuator ◽  
Word Segmentation ◽  
Tactile Display ◽  
Chinese Characters ◽  
Display Device ◽  
Display System ◽  
To Receive ◽  
Braille Display

According to the situation that conditional Braille book is difficulty in publication and its amount is small. This paper puts forward a tactile display system which can transform content of common e-book to Braille information, and the blind comprehend the text by touching the Braille formed by the tactile display device. This Braille tactile display system extracts Chinese characters by OCR technology. The text recognized is segmented into word blocks according to the rule of Braille word segmentation before transforming to double-phoneme mandarin Braille. It uses dsPIC30F2010 to receive Braille signal and then controls the piezoelectric actuator array to output corresponding displacement.

Configuration of a Novel Sub-Millimeter Resolution Piezoelectric Actuator Based Wearable Tactile Display System for Blind Individuals

2011 ◽  
Author(s):  
Prakash C. R. J. Naidu ◽  
Ramesh Yechangunja ◽  
Mandayam A. Srinivasan
Keyword(s):  
Piezoelectric Actuators ◽  
Body Part ◽  
Tactile Display ◽  
Significant Feature ◽  
Block Type ◽  
Display Device ◽  
Display System ◽  
Potential Applications ◽  
Blind Individuals ◽  
General Communication

This paper presents the work conducted towards the realization of a novel tactile display system, first using block type piezoelectric actuators and later using cantilever type piezoelectric actuators. The system is particularly useful for blind users to communicate with computers through touch, but also has many potential applications in several other fields such as virtual reality, gaming, and other general communication interfaces for sighted users. Although piezoelectric actuators have been used in the past in electronic Braille and other systems, there is no reported configuration that can achieve sub-millimeter center-to-center resolution in an array of programmable actuation pins that act as interfaces in contact with a human body part such as a finger. This paper reports development of a wearable tactile display device: (a) built of block type actuators and its characterization showing that the perception was not adequate for certain purposes; (b) further, a novel arrangement with considerable improvement in perception wherein- (i) two or more vibrating stimulation pins can be located close to each other at the plane of contact with a finger, and (ii) actuated by means of piezoelectric bending elements arranged in a cantilever configuration partially overlapping each other in multiple planes. A significant feature of the unique configuration reported in this paper is that vibratory stimulation can be achieved at finer spatial resolutions than hitherto achieved.

A Touch/Force Display System for Haptic Interface

2001 ◽  
Vol 10 (2) ◽  
pp. 225-235 ◽  
Author(s):  
Tsuneo Yoshikawa ◽  
Akihiro Nagura
Keyword(s):  
Control Algorithm ◽  
Tactile Display ◽  
Haptic Interface ◽  
Virtual Object ◽  
Display Device ◽  
Display System ◽  
Virtual Reality Technology ◽  
Display Devices ◽  
Sensory Channel ◽  
The Difference

The importance of force and tactile display in virtual reality technology has been recognized recently, and much research has been undertaken, including development of various force and/or tactile display devices. However, many of these devices are always in contact with the fingers or hands of the operators, and it is impossible for an operator to feel the difference between a contact and a noncontact state with a virtual object directly from tactile sensory channel in his/her finger or hand. This paper presents a new haptic display device that we have developed that provides both touch and force feeling to the operator's fingers. The device tracks the operator's finger without contact when the finger is not in contact with any virtual object. When some virtual object is in contact with the finger, the device touches and displays force to the finger. A control algorithm for the system is given to display the dynamics of the virtual objects. Preliminary experimental results are also presented to show the feasibility of the device and the validity of the control algorithm.

A NEW BRAILLE DISPLAY SYSTEM DESIGN USING A POLYMER-BASED SOFT ACTUATOR TACTILE DISPLAY

2008 ◽  
pp. 239-248
Author(s):  
Ja Choon Koo ◽  
Hyouk Ryeol Choi ◽  
Kwangmok Jung ◽  
Jae-do Nam ◽  
Young kwan Lee ◽  
...  
Keyword(s):  
System Design ◽  
Tactile Display ◽  
Display System ◽  
Soft Actuator ◽  
Braille Display

Design Exploration of Affordable Refreshable Braille Display Technology for Low-Income Visually Impaired Users

2017 ◽  
Author(s):  
Anthony S. Walker ◽  
Shraddha Sangelkar
Keyword(s):  
Developing Countries ◽  
Low Income ◽  
Visually Impaired ◽  
Developed Countries ◽  
Tactile Display ◽  
Influential Factor ◽  
High Price ◽  
Digital Information ◽  
The Cost ◽  
Braille Display

People with visual disability need assistance in reading and writing by converting text to braille. Braille allows tactile display of the information for the visually impaired. Refreshable braille displays are commonly available in developed countries for a high price with the number of cells the display contains being the most influential factor on that price. Low-income blind individuals from developing countries cannot afford an expensive refreshable braille display, which in turn limits their access to digital information. The purpose to this paper is to explore design options for reducing the cost of refreshable braille displays. The paper begins with a summary of currently available refreshable braille displays on the market and their features. Next, the design requirements are explored for developing a low-cost device for visually impaired users in the developing countries. The paper also explains the state-of-the-art technologies for actuating the braille dots that may reduce the cost of the device. Finally, the recommendations for reducing the cost of these displays are presented.

Braille display device using soft actuator

2004 ◽  
Author(s):  
Sangwon Lee ◽  
Kwangmok Jung ◽  
Jachoon Koo ◽  
Sungil Lee ◽  
Hoogon Choi ◽  
...  
Keyword(s):  
Display Device ◽  
Soft Actuator ◽  
Braille Display

Overview of Chinese Word Segmentation Method

2013 ◽  
Vol 427-429 ◽  
pp. 2568-2571
Author(s):  
Shu Xian Liu ◽  
Xiao Hua Li
Keyword(s):  
Information Processing ◽  
Natural Language Processing ◽  
Language Processing ◽  
Word Segmentation ◽  
Basic Knowledge ◽  
Chinese Characters ◽  
Chinese Word ◽  
Segmentation Method ◽  
Chinese Word Segmentation ◽  
Chinese Information Processing

This article provides a brief introduction to Natural Language Processing and basic knowledge of Chinese Word Segmentation at first. Chinese Word Segmentation is a process of turning a series of Chinese characters into a series of Chinese words with some rules. As the fundamental component of Chinese information processing, it is wildly used in correlative areas. Accordingly, research on Chinese Word Segmentation has important theoretic and realistic meaning. In this paper, we mainly introduces the challenge in Chinese Word Segmentation, and presented the categories of Chinese Word Segmentation method.

Sign in / Sign up

Export Citation Format

Share Document