1、 TECHNICAL SPECIFICATION IEC TS 62393First edition 2005-05Portable and hand-held multimedia equipment Mobile computers Battery run-time measurement Reference number IEC/TS 62393:2005(E) Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 serie
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7、rther information. Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Service Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 TECHNICAL SPECIFICATION IEC TS 62393First edition 2005-05Portable
8、and hand-held multimedia equipment Mobile computers Battery run-time measurement PRICE CODE IEC 2005 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permissi
9、on in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch G For price, see current catalogue Commission Electrotechnique Internat
10、ionale International Electrotechnical Commission 2 TS 62393 IEC:2005(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PORTABLE AND HAND-HELD MULTIMEDIA EQUIPMENT MOBILE COMPUTERS BATTERY RUN-TIME MEASUREMENT FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization fo
11、r standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publis
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23、l Standards. IEC 62393, which is a technical specification, has been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment. TS 62393 IEC:2005(E) 3 The text of this technical specification is based on the following documents: Enquiry draft Report on voting 100/848
24、/DTS 100/936/RVC Full information on the voting for the approval of this technical specification can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this
25、 publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be transformed into an International standard, reconfirmed; withdrawn; replaced by a re
26、vised edition, or amended. A bilingual version of this document may be issued at a later date. 4 TS 62393 IEC:2005(E) INTRODUCTION Adequate indication of the remaining battery level is crucial for mobile equipment, as its malfunction may lead to loss of user data. The wireless communication function
27、 of the mobile equipment causes the power dissipation to be larger and more irregular. A reliable indication of the remaining battery level is, therefore, strongly needed. TS 62393 IEC:2005(E) 5 PORTABLE AND HAND-HELD MULTIMEDIA EQUIPMENT MOBILE COMPUTERS BATTERY RUN-TIME MEASUREMENT 1 Scope This Te
28、chnical Specification defines the operation-mode mix of portable and hand-held multimedia equipment which can be driven by battery, especially mobile personal computers, in order to clarify the issues to be standardized on the battery run time. 2 Battery run-time measurement methods for mobile PCs 2
29、.1 General Current products have a variety of methods for setting power management as shown in Figure 1, and screens may differ from this example. If this is the case, the settings which most closely match the example should be used. The battery run time should be calculated as follows. (measurement
30、 method a) + (measurement method b)/2 The result should be rounded downward to one decimal point, and the result displaced as x.y. It is acceptable to use the term “approximately“ or “about.“ Example: Measurement method (a) 3 h 15 min, measurement method (b) 8 h 7 min (195 min + 487 min)/2 = 5,683 h
31、 This should be rounded down to 5,6 h (or about 5,6 h). It is necessary to disclose all information on settings which are different from the factory shipping default. Examples of disclosure: by the Web, by an information centre, or by brochure. The margin on the measured value to the published value
32、 should not be defined. Figure 1 Power option properties Power Option Properties Turn off hard disks System stand by Turn off monitor Never After 30 mins Never Close IEC 582/05 6 TS 62393 IEC:2005(E) 2.2 Measurement method (a) At a display luminance of 20 cd/m 2 , the continuous playback time of one
33、 MPEG moving image file read from a hard disk should be measured. MPEG movie file The MPEG movie file specified by this measuring method should be used. The sound should be set to the minimum (mute is acceptable as shown in Figure 2). Figure 2 Volume control Luminance of LCD While displaying white o
34、n the LCD, the luminance should be set to a minimum of 20 cd/m 2 . Any luminance exceeding 20 cd/m 2(such as 25 cd/m 2 ) is acceptable. The luminance of the white area should not be reduced to less than 20 cd/m 2during measurement. The white should be defined as the R, G and B data of each pixel at
35、their maximum values. A fluctuating luminance is acceptable during measurement as long as it does not fall below 20 cd/m 2 . The way to set the values for the LCD to exceed the 20 cd/m 2should be disclosed so that the luminance for measurement can be set without the need for an intensity meter (for
36、example, two steps from the lower end of a five-step intensity range). Software used for movie playback is not defined. Software which is bundled in the shipping unit is preferred. Software which is used should be disclosed. The user should be able to obtain the same playback software used for the m
37、easurement by downloading or purchasing. Playback size of the movie: one time (320 240). Percentage setting of battery remaining to be defined at the end of the test: not defined. It is acceptable to disable the percentage checking and run the test all the way down until the battery is empty Margin
38、between measured results and value published in product catalogue: not defined. The guidelines of each PC manufacturer may be followed. Charging the battery for testing: charge the battery in the notebook PC itself. Condition of battery (degree of degradation, etc.): not defined. Can be determined b
39、y each PC manufacturer. Setting the other power management: not defined. Power management should not cause any frame drops during playback of the movie. Location of movie file The movie file should be stored on the hard disk, and the file always played back by reading it directly from the hard disk
40、during playback. However, if there is no hard drive in the system, the movie file may be stored in a secondary memory source such as a flash card. Mute all Main Volume Volume Control IEC 583/05 TS 62393 IEC:2005(E) 7 Storing or caching the entire moving image file in a main memory during measurement
41、 is prohibited. In the case where the file is cached, the movie file should be linked many times so that the size for the file will exceed the main memory. Foreground applications and background applications running during measurement: not defined. If the computer set-up has changed from the factory
42、 shipping default, the change should be disclosed. 2.3 Measurement method (b) The notebook PC should be set so that the desktop screen is displayed at the lowest luminance of the LCD. Power management settings are not defined in detail, but information on the settings should be disclosed. Regulated
43、items Luminance of LCD: set to the lowest possible value. Neither the backlight nor the screen should be set to OFF. However, in the case of a system which has reflective type LCD, it may be measured without backlight. Margin between measured value and value published in product catalogue: not defin
44、ed. May follow the guideline of each PC manufacturer Foreground applications and background applications running during measurement: not defined. If the computer set-up has changed from the factory shipping default, the change should be disclosed. Percentage setting of battery remaining to be define
45、d at the end of the test: not defined. It is acceptable to disable the percentage checking and run the test all the way down until the battery is empty. Powering-off of hard disk drive: not defined. Powering-off the hard disk drive during measurement is acceptable. The power management value can be
46、the lowest value that can be set. Other power management: not defined. As long as the screen and backlight are on during the measurement, no other regulation applies. However, the power management settings should be disclosed. _ StandardsSurvey TheIECwouldliketoofferyouthebestqualitystandardspossibl
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