IEC 61747-30-4:2016 PDF

Name: IEC 61747-30-4:2016 — Liquid crystal display devices - Part 30-4: Measuring methods for liquid crystal display modules - Dynamic backlight units
SKU: IEC 61747-30-4:2016
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Liquid crystal display devices - Part 30-4: Measuring methods for liquid crystal display modules - Dynamic backlight units

Название (английский):

IEC 61747-30-4:2016

Liquid crystal display devices - Part 30-4: Measuring methods for liquid crystal display modules - Dynamic backlight units

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 26
Дата публикации:: 25 августа 2016 г.
Издание:: IEC IS 61747 edition 1 version 1
ICS:: 31.120

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Описание (английский):

IEC 61747-30-4:2016(E) specifies the standard measurement conditions and measuring methods for determining the optical performance and power consumption of active matrix liquid crystal display modules with dynamic backlight units.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

IEC 61747-30-4:2016 specifies standardized measurement conditions and methods for determining the optical performance and power consumption of active-matrix liquid crystal display (LCD) modules that include dynamic backlight units (DBUs). The standard defines test environments, signal patterns, required measuring equipment and procedures to ensure repeatable, comparable results for luminance, chromaticity, uniformity, flicker, judder and both static and dynamic power use.

Key Topics and Technical Requirements

Standard measuring conditions

Temperature: 25 °C ± 3 °C; Relative humidity: 25 %–85 % RH; Pressure: 86–106 kPa.
Power supply tolerance: ±0.5 % voltage, ±0.2 % frequency.
Warm-up: apply 100 % grey input until luminance variations ≤ 1 % per 5 min for at least five samples; minimum 15 min warm-up.
Dark-room: reflected background luminance perpendicular to module < 0.03 cd/m² (otherwise apply background subtraction).

Required measuring equipment

Luminance meter: spectral responsivity limits such that relative uncertainty ≤ 4 % for luminance > 10 cd/m² and ≤ 10 % for ≤ 10 cd/m².
Colourimeter / imaging colourimeter: chromaticity accuracy 0.004 (x,y); imaging device should sample ≥4 pixels per display subpixel and be ≥12-bit.
Fast-response photometer: linearity better than 0.5 %, –3 dB cut-off frequency > 1 kHz.

Measured optical characteristics

Luminance and uniformity, chromaticity and uniformity, window-size dependence, contrast ratio, flicker (with TCSF weighting), and judder (motion-dependent temporal instability).

Power consumption

Procedures for static and dynamic power measurement of DBUs, including test signal patterns (full screen, checkerboard, increasing window, line patterns, moving image, video).

Practical Applications and Users

Who uses it: display manufacturers, test laboratories, OEMs, product validation teams, compliance engineers, and procurement/specification writers.

Why it matters:

Ensures reproducible comparison of DBU performance across vendors and models.
Supports energy-efficiency evaluation, product datasheets and regulatory reporting.
Enables objective assessment of visual artifacts (flicker, judder) that affect user experience and accessibility.
Guides R&D and quality control when optimizing dynamic backlight algorithms for power vs. visual fidelity.

Related Standards

IEC 61747-1-2 (terminology and symbols)

IEC 61747-30-1:2012 (measuring methods - transmissive type)

IEC 62087 (power consumption measurement methods for audio/video equipment)

ISO 11664-1 (CIE standard colourimetric observers)

Keywords: IEC 61747-30-4, dynamic backlight units, liquid crystal display modules, measuring methods, luminance, chromaticity, flicker, judder, power consumption.

IEC 61747-30-4:2016 PDF

Abstract

Похожие стандарты

Overview

Key Topics and Technical Requirements

Practical Applications and Users

Related Standards

Технические детали

IEC 61747-30-1:2012

Liquid crystal display devices - Part 30-1: Measuring methods for liquid crystal display modules - Transmissi…

IEC 61747-1-2:2014

Liquid crystal display devices - Part 1-2: Generic - Terminology and letter symbols

BS EN IEC 62087-2:2023

Audio, video, and related equipment. Determination of power consumption - Signals and media

BS EN ISO 11664-1:2011

Colorimetry - CIE standard colorimetric observers