CEA-2041-2012 Standard for a Round Tactile Indicator《圆形触觉指示器标准》.pdf

1、 ANSI/CEA Standard Standard for a Round Tactile Indicator ANSI/CEA-2041 June 2012 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers,

2、facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any respect preclude any member or n

3、onmember of CEA from manufacturing or selling products not conforming to such Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than CEA members, whether the standard

4、 is to be used either domestically or internationally. Standards, Bulletins and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any patent owner, nor does it assume

5、 any obligation whatever to parties adopting the Standard, Bulletin or other technical publication. This document does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this document to establish appr

6、opriate safety and health practices and to determine the applicability of regulatory limitations before its use. This document is copyrighted by the Consumer Electronics Association (CEA) and may not be reproduced, in whole or part, without written permission. Federal copyright law prohibits unautho

7、rized reproduction of this document by any means. Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement. Requests to reproduce text, data, charts, figures or other material should be made to CEA. (Formulated under the cognizance of the CEA R

8、4 Video Systems Committee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2012 Technology Telecommunications keypads and keyboards; Tactile identifiers, (1998-12) AS/ACIF S040:2001, Requirements for Customer Equipment for use with the Standard Telephone Service - Features for special needs of person

9、s with disabilities (2001) ISO 24503:2011 - Ergonomics - Accessible design -Tactile dots and bars on consumer products (1/2011) 3 Definitions Tactile indicator: a tactile feature, such as a raised nib, a raised dash, or an indentation on a key cap, or texture or key shape, which is designed to assis

10、t in the recognition of a key without sight, but which does not necessarily have a one-to-one relationship with a key. For example, raised dashes on some QWERTY keyboards are tactile indicators for the F and J keys. Tactile identifier: the tactile indicator or set of tactile indicators on a key whic

11、h identifies(y) the specific function of the key without the use of sight and without any ambiguity. 4 Overview Users of consumer electronics products may be blind or visually impaired. For such consumers, some features are desirable in order to assist in their use of products. This document identif

12、ies some features of remote controls which may assist users who are blind or visually impaired. 5 Tactile Indicator 5.1 Numeric Keypad Layout To assist users who are blind or visually impaired, numeric keypads should, whenever possible, be laid out in a standard 4 x 3 array, as shown below in Figure

13、 1 below. The figure shows the keypad consisting of four rows of keys, in three columns. The first row consists of the numbers “1”, “2” and “3” arranged left-to-right. The second row consists of the numbers “4”, “5”, and “6” arranged left to right. The third row consists of the numbers “7”, “8” and

14、“9” arranged left to right. The fourth (bottom) row consists of the number “0” centered below the “8”. CEA-2041 2 1 2 3 4 5 6 7 8 9 0 Figure 1 - Standard 4x3 Array Note that there may be other keys around this structure, especially keys to the left and right of the “0“ key. 5.2 Tactile Indicator on

15、Numeric Keypads A single nib should be provided on the “5” key. The nib should be located, to the extent possible, in the middle of the “5” key such that it may be felt by the fingertip without activating the button. The presence of the single nib identifies the “5“ key and should not be used on any

16、 other numeric key. The presence of the single nib implies that the keypad is laid out as shown in Figure 1 and should not be used on keypads that are laid out in a different manner. 5.3 Dimensions of Tactile Indicator The tactile indicator feature shall be a raised round dot with the dimensions sho

17、wn below. The figure shows a rounded raised round dot with a diameter of 1.50mm +/- 0.2mm, and a height of 0.60mm +/- 0.2mm. 0.600.2mm1 . 5 0 0 . 2 m mFigure 2 - Tactile indicator CEA Document Improvement Proposal If in the review or use of this document a potential change is made evident for safety, health or technical reasons, please email your reason/rationale for the recommended change to standardsce.org. Consumer Electronics Association Technology & Standards Department 1919 S Eads Street, Arlington, VA 22202 FAX: (703) 907-7693 standardsce.org