IEC 61747-30-5:2019

Liquid crystal display devices - Part 30-5: Optical measuring methods of transmissive transparent LCD modules

IEC 61747-30-5:2019(E) specifies the standard measurement conditions and measuring methods for determining the optical properties of transparent liquid crystal display modules which operate in a transmissive mode. More specifically, this document focuses on three particular aspects of the transparent properties, i.e. transmittance, haze, and image distortion.

General Information

• Status: Published
• Publication Date: 17-Jan-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.120 - Electronic display devices
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 2 - TC 110/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 01-Feb-2019
• Completion Date: 18-Jan-2019

Standards Content (Sample)

IEC 61747-30-5 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
colour
inside
Liquid crystal display devices –
Part 30-5: Optical measuring methods of transmissive transparent LCD modules
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IEC 61747-30-5 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
colour
inside
Liquid crystal display devices –

Part 30-5: Optical measuring methods of transmissive transparent LCD modules

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-6420-1

– 2 – IEC 61747-30-5:2019  IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, symbols and units . 6
4 Measurement conditions . 7
4.1 Standard measurement environmental conditions . 7
4.2 Standard measurement darkroom conditions. 8
4.3 Standard measurement locations . 8
5 Measurement methods of on-screen properties . 8
5.1 Measurement equipment and its setup . 8
5.2 Measurement methods . 9
6 Measurement methods of through-screen properties . 10
6.1 Luminous transmittance and its uniformity . 10
6.1.1 Purpose . 10
6.1.2 Measurement conditions . 10
6.1.3 Measurement methods . 10
6.2 Transmitted haze . 11
6.2.1 Purpose . 11
6.2.2 Measurement conditions . 11
6.2.3 Test apparatus . 11
6.2.4 Procedure . 13
6.2.5 Results . 14
6.2.6 Reporting . 14
6.3 Colour shift . 14
6.3.1 Purpose . 14
6.3.2 Measurement conditions . 14
6.3.3 Test apparatus . 14
6.3.4 Procedure . 15
6.3.5 Reporting . 15
6.4 Contrast ratio offset . 16
6.4.1 Purpose . 16
6.4.2 Measurement conditions . 16
6.4.3 Test apparatus . 16
6.4.4 Procedure . 16
6.4.5 Reporting . 17
6.5 Sharpness . 17
6.5.1 Purpose . 17
6.5.2 Measuring conditions . 17
6.5.3 Test apparatus . 17
6.5.4 Procedure . 18
6.5.5 Results . 18
6.5.6 Reporting . 20
6.6 MTF and Michelson contrast ratio . 20
6.6.1 Purpose . 20
6.6.2 Measurement conditions . 20
6.6.3 Measurement methods . 20

6.6.4 Reporting . 22
7 Contrast ratio and colour coordinates with the incident illumination originating
from objects behind the screen . 22
7.1 Purpose . 22
7.2 Measurement method with white light source . 24
7.2.1 General . 24
7.2.2 Measurement conditions . 24
7.2.3 Measurement method . 24
7.3 Measurement method with collimated or directional light source . 25
7.3.1 Purpose . 25
7.3.2 Measurement conditions . 25
7.3.3 Measurement method background . 26
7.3.4 Measurement method . 26
Bibliography . 27

Figure 1 – Measurement points . 8
Figure 2 – Measurement equipment and its configuration . 9
Figure 3 – Measurement configuration with light source . 10
Figure 4 – Schematic arrangement of the apparatus (TOP view) . 13
Figure 5 – Measurement system and its configuration . 15
Figure 6 – Reference object and its configuration . 16
Figure 7 – Example reference object and its configuration . 18
Figure 8 – Luminance curve of reference object . 19
Figure 9 – Definition of test parameters . 20
Figure 10 – Reference object and its configuration. 21
Figure 11 – Relationship between stripe frequency and MTF . 22
Figure 12 – Geometry of the transparent display and the bright background object . 23
Figure 13 – Case with bright backgrounds . 23
Figure 14 – Measurement configuration for transparent display with background object . 25

Table 1 – Measurements . 13
Table 2 – Measurement results . 16
Table 3 – Data summary for contrast offset . 17
Table 4 – Example of reported specification of two-dimensional LMD . 18

– 4 – IEC 61747-30-5:2019  IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIQUID CRYSTAL DISPLAY DEVICES –

Part 30-5: Optical measuring methods of transmissive
transparent LCD modules
FOREWORD
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