1、 IEC 61988-4-2 Edition 1.0 2012-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Plasma display panels Part 4-2: Environmental testing methods Panel strength Panneaux daffichage plasma Partie 4-2: Mthodes dessais denvironnement Rsistance des panneaux IEC61988-4-2:2012 THIS PUBLICATION IS COPYRIGHT PRO
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16、lay panels Part 4-2: Environmental testing methods Panel strength Panneaux daffichage plasma Partie 4-2: Mthodes dessais denvironnement Rsistance des panneaux INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE N ICS 31.120; 31.260 PRICE CODE CODE PRIX ISBN 978-2-889
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18、ia un distributeur agr. 2 61988-4-2 IEC:2012 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 4 Structure of measuring equipment 6 5 Standard measuring conditions . 6 6 Measuring methods 6 6.1 Ball drop strength 6 6.1.1 Purpose . 6 6.1.2 Measuring equipment 6
19、6.1.3 Applicability . 6 6.1.4 Measurement layout 6 6.1.5 Measuring point . 8 6.1.6 Ball and drop height 8 6.1.7 Measuring procedure . 9 6.2 Partial heating strength . 9 6.2.1 Purpose . 9 6.2.2 Measuring equipment 9 6.2.3 Measuring environmental conditions 10 6.2.4 Measuring layout . 10 6.2.5 System
20、diagram . 12 6.2.6 Measuring positions . 12 6.2.7 Heating rate and maximum temperature 13 6.2.8 Measuring procedure . 13 Bibliography 14 Figure 1 Setting of PDP module (side view) . 7 Figure 2 Setting of PDP module using spacers (side view) . 7 Figure 3 Setting of PDP panel (side view) 7 Figure 4 Me
21、asuring layout of ball drop strength (side view) 8 Figure 5 Measuring points 8 Figure 6 PDP panel setting 11 Figure 7 Setting of thermal sensor (sectional view) 11 Figure 8 Set up of measuring equipment 12 Figure 9 Measuring positions . 12 Table 1 Ball and drop height . 9 61988-4-2 IEC:2012 3 INTERN
22、ATIONAL ELECTROTECHNICAL COMMISSION _ PLASMA DISPLAY PANELS Part 4-2: Environmental testing methods Panel strength FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committ
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33、 Standard IEC 61988-4-2 has been prepared by IEC technical committee 110: Electronic display devices. The text of this standard is based on the following documents: FDIS Report on voting 110/354/FDIS 110/369/RVD Full information on the voting for the approval of this standard can be found in the rep
34、ort on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 61988 series, published under the general title Plasma display panels, can be found on the IEC website. 4 61988-4-2 IEC:2012 Future Part
35、 4-x standards in this series will include the new title component: Environmental testing methods, as cited above. Titles of existing Part 4-x standards in this series will be updated accordingly at the time of the next edition. The committee has decided that the contents of this publication will re
36、main unchanged until the stability 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 reconfirmed, withdrawn, replaced by a revised edition, or amended. 61988-4-2 IEC:2012 5 PLASMA DISPLAY PANELS Par
37、t 4-2: Environmental testing methods Panel strength 1 Scope This part of IEC 61988 defines testing methods for evaluating mechanical characteristics of plasma display modules (PDP modules) in the following areas: a) Ball drop breaking strength of panels; b) Partial heating strength of panels. 2 Norm
38、ative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
39、 applies. IEC 60068-1:1988, Environmental Testing Part 1: General and guidance IEC 61988-1, Plasma display panels Part 1: Terminology and letter symbols IEC 61988-2-1, Plasma display panels Part 2-1: Measuring methods Optical and optoelectrical IEC 61988-4, Plasma display panels Part 4: Climatic and
40、 mechanical testing methods 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60068-1 and IEC 61988-1 and the following apply. 3.1 ball drop breaking strength breaking strength against a ball drop impact measured as a breaking drop height using a ball
41、whose weight and material are previously determined 3.2 rubber heater soft and flexible sheet (generally made from thermally conductive rubber) in which electric heating element is molded Note 1 to entry: Temperature uniformity of rubber heater is obtained by the layout of heating wire in the sheet
42、and its material. 3.3 partial heating strength mechanical strength under a thermal stress caused by heating a limited area of panel 6 61988-4-2 IEC:2012 Note 1 to entry: Still images including bright small part(s) located near screen edge surrounded by dark background emulate significant partial hea
43、ting at the bright part(s). In some cases, the thermal stress breaks the panel. Luminous efficacy and heat radiation design affect the thermal stress. 4 Structure of measuring equipment The system diagrams and/or driving conditions of the measuring equipment shall comply with the structure specified
44、 in each item. 5 Standard measuring conditions Measurements shall be carried out under the standard environmental conditions defined in IEC 61988-2-1, i.e. at a temperature of 25 C 3 C, a relative humidity of 25 % to 85 % and a pressure of 86 kPa to 106 kPa. PDP modules and PDP panels to be measured
45、 shall be kept in off-state and in the environmental conditions until they reach the stable temperature. When different conditions are used, these shall be noted on the report. The standard reference atmosphere defined in IEC 61988-4, i.e. 25 C and 101,3 kPa, is applied. 6 Measuring methods 6.1 Ball
46、 drop strength 6.1.1 Purpose The purpose of this method is to measure the impact strength of screen of a PDP module using ball drop. 6.1.2 Measuring equipment The following equipment shall be used: a) ball; NOTE 1 Three kinds of smooth steel balls with the weights of 5,6 g, 8,3 g and 533 g are used.
47、 b) height scale; and c) others when used. NOTE 2 For example a drop guide, which is a straight plastic pipe, whose inner radius is larger than the radius of ball, and has side holes at the drop heights, can be used. 6.1.3 Applicability This measurement can be applied to PDP module and PDP panel. In
48、 the case that modules use directly laminated filter, the modules should be measured with the directly laminated filter. 6.1.4 Measurement layout The PDP module shall be set on a rigid table or a rigid floor with the screen upward and horizontal avoiding free movement and vibration as shown in Figur
49、e 1, or Figure 2 by using rigid spacers. In the case of a PDP panel, the panel shall be set on a measurement base with the screen upward and horizontal as shown in Figure 3, avoiding free movement and vibration. The measurement base and the cushion sheets should be the chassis and the bonding material(s)/adhesive sheets respectively, or well-defined ones. The details of the measurement base and the
