IEC 62595-2-5 Display lighting unit-Part 2-5: Measurement method for optical quantities of non-planar light sources

This part of IEC 62595 specifies the measurement methods for measuring the optical characteristics of convex and concave cylindrical light sources. These non-planar light sources (NPLSs) can have either a continuous, distinct, segmented or block-wised light radiating surface, for example OLED panels, integrated LEDs, integrated mini-LEDs, micro-LEDs, laser diodes, each being either monochromatic or polychromatic.

Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments) applies.

IEC 61747-6-2, Liquid crystal display devices – Part 6-2: Measuring methods for liquid crystal display modules – Reflective type

IEC 62595-2-1, Display lighting unit – Part 2-1: Electro-optical measuring methods of LED backlight unit

IEC 62595-2-3, Display lighting unit – Part 2-3: Electro-optical measuring methods for LED frontlight unit

IEC 62679-3-3, Electronic paper displays – Part 3-3: Optical measuring methods for displays with integrated lighting units
IEC 62922, Organic light emitting diode (OLED) panels for general lighting – Performance requirements

ISO/CIE 11664-3, Colorimetry – Part 3: CIE tristimulus values

ISO/CIE 19476, Characterization of the performance of illuminance meters and luminance meters

CIE S 017/E:2020, International Lighting Vocabulary

CIE 1931, Colour space

Measurement devices

In 4.1 to 4.5 a light measurement device, such as a spectrometer, an integrating sphere and a goniometer with LMD are used. In addition, three axial stages for fixing the device under test are used.

For an evaluation of the measurement results, the Cartesian and the spherical coordinate systems are used as shown in Figure 1.

LISUN following instruments fully meet IEC 62595-2-5 Display lighting unit-Part 2-5: Measurement method for optical quantities of non-planar light sources:

XYL-VI Luminance Colorimeter

LSG-1890BCCD High Precision Rotation Luminaire Goniospectroradiometer

LPCE-3 CCD Spectroradiometer Integrating Sphere Compact System

LPCE-2(LMS-9000) High Precision Spectroradiometer Integrating Sphere System