{"id":421361,"date":"2024-10-20T06:35:47","date_gmt":"2024-10-20T06:35:47","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iec-62595-2-32018-2\/"},"modified":"2024-10-26T12:20:52","modified_gmt":"2024-10-26T12:20:52","slug":"bs-iec-62595-2-32018-2","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iec-62595-2-32018-2\/","title":{"rendered":"BS IEC 62595-2-3:2018"},"content":{"rendered":"

This part of IEC 62595 specifies the standard measurement conditions and measuring methods for determining electrical, optical, and electro-optical properties of LED frontlight units (FLUs) for reflective displays.<\/p>\n

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NOTE: See 3.1.1 for a definition of reflective display.<\/p>\n<\/blockquote>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
6<\/td>\nFOREWORD <\/td>\n<\/tr>\n
8<\/td>\n1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms and letter symbols
3.1 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n3.2 Abbreviated terms <\/td>\n<\/tr>\n
11<\/td>\n3.3 Letter symbols (quantity symbols \/ unit symbols)
Table 1 \u2013 Letter symbols (quantity symbols \/ unit symbols) <\/td>\n<\/tr>\n
12<\/td>\n4 Measuring devices
4.1 General
4.2 Light measuring device (LMD)
4.2.1 Luminance meter
4.2.2 Spectroradiometer (spectral radiance-meter)
4.2.3 Conoscopic system
4.2.4 Image sensor
4.3 Other devices
4.3.1 Sample stage <\/td>\n<\/tr>\n
13<\/td>\n4.3.2 Light absorber
5 General measuring conditions
5.1 Standard conditions
5.2 Measurement setup
Figures
Figure 1 \u2013 Example of light absorber (optical trap) <\/td>\n<\/tr>\n
14<\/td>\n5.3 Warm-up time
6 Electrical measurement methods
6.1 Conditions
6.2 Current
6.3 Voltage
6.4 Power consumption
Figure 2 \u2013 Example of measurement setup for a LED FLU <\/td>\n<\/tr>\n
15<\/td>\n7 Optical measurement methods
7.1 General
7.2 Dark room conditions
7.2.1 General
7.2.2 Measurement items under the external lighting condition
7.2.3 Measurement items under the internal lighting condition
7.3 Conditions <\/td>\n<\/tr>\n
16<\/td>\n7.4 Luminance
7.4.1 General
7.4.2 Procedures
Figure 3 \u2013 Illustration of zenith angle \u03b8 and azimuth angle \u03d5 (normal-state FLU) <\/td>\n<\/tr>\n
17<\/td>\n7.5 Angular luminance distribution (ALD)
7.6 Luminance uniformity or non-uniformity
Figure 4 \u2013 Polar coordinate system for frontlight unit measurement <\/td>\n<\/tr>\n
18<\/td>\n7.7 Spectral power distribution
7.8 Chromaticity
7.9 Colour uniformity
7.10 Angular luminance uniformity
7.11 Angular colour uniformity
7.12 FLU polarization characteristic measurement <\/td>\n<\/tr>\n
19<\/td>\n7.13 Normal- or inverted-state FLU characteristics
7.14 Optical noise measuring
7.15 Cosmetic quality or perceptual visual quality
Figure 5 \u2013 Example of light polarizing characteristics of an FLU in inverted state <\/td>\n<\/tr>\n
21<\/td>\nAnnex A (informative) Optical structure of an FLU
Figure A.1 \u2013 Direct edge-lit FLU and indirect edge-lit FLU <\/td>\n<\/tr>\n
22<\/td>\nAnnex B (informative) Normal-state FLU and inverted-state FLU
Figure B.1 \u2013 Normal-state FLU
Figure B.2 \u2013 Inverted-state FLU <\/td>\n<\/tr>\n
23<\/td>\nAnnex C (informative) Angular measurement system
Figure C.1 \u2013Standard goniometric system
Figure C.2 \u2013 Conoscopic system <\/td>\n<\/tr>\n
24<\/td>\nAnnex D (informative) Measurement parameters for BRDF and BTDF
D.1 BRDF
D.2 BTDF
Figure D.1 \u2013 System for measuring the BRDF
Figure D.2 \u2013 Measuring the BRDF of an LGP for an FLU <\/td>\n<\/tr>\n
25<\/td>\nFigure D.3 \u2013 System for measuring the BTDF <\/td>\n<\/tr>\n
26<\/td>\nAnnex E (informative) Determining the polarization state of reflected light on the front surface of an FLU or transmitted light through the FLU
Figure E.1 \u2013 Geometry of a reflected or transmitted polarized light <\/td>\n<\/tr>\n
27<\/td>\nAnnex F (informative) Optical transfer function (OTF) of an FLU
F.1 Optical transfer function evaluation chart
F.2 Example of optical transfer function
Figure F.1 \u2013 Printed charts on photographic paper for measuring the OTF of the FLU <\/td>\n<\/tr>\n
28<\/td>\nFigure F.2 \u2013 Example of OTF <\/td>\n<\/tr>\n
29<\/td>\nAnnex G (informative) Sources of optical noise in a normal-state FLU with a reflective display
Figure G.1 \u2013 Light rays of an FLU with a reflective LC display
Figure G.2 \u2013 Sources of noises in a normal-state FLU with a reflective display <\/td>\n<\/tr>\n
30<\/td>\nAnnex H (informative) Formulation of contrast ratio for a reflective display with an integrated FLU
H.1 Contrast ratio for a reflective display without FLU integration
H.2 Contrast ratio for a reflective display with FLU integration <\/td>\n<\/tr>\n
31<\/td>\nAnnex I (informative) Example of optical noise of an FLU
Figure I.1 \u2013 Optical signal and noise in a normal-state FLU <\/td>\n<\/tr>\n
32<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Display lighting unit – Electro-optical measuring methods for LED frontlight unit<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2018<\/td>\n34<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":421369,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-421361","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/421361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/421369"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=421361"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=421361"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=421361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}