Overview
IEC 62906-5-1:2021 is an International Electrotechnical Commission (IEC) standard that defines the conditions and methods for measuring the optical performance of laser front projection displays. This part of the IEC 62906 series specifically focuses on front projection displays that do not use a screen and employ lasers or hybrid laser technologies as light sources. These hybrid sources may combine lasers with other spontaneous emission-based light sources. The document applies to full-frame projection technologies, including digital micro-mirror devices (DMDs), liquid crystal on silicon (LCOS), and liquid crystal display (LCD) projectors.
By offering standard methods for optical performance measurement, IEC 62906-5-1 supports manufacturers, testing labs, and research professionals in obtaining reproducible, reliable results for the evaluation and comparison of laser projectors.
Key Topics
IEC 62906-5-1:2021 covers a variety of essential measurement topics for laser projector displays, including:
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Standard Measuring Conditions:
- Specified environmental conditions (temperature, humidity, pressure)
- Dark room setup and minimizing background light
- Stability and calibration requirements for measuring instruments
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Measurement Equipment and Setup:
- Use of illuminance meters, integrating spheres, and reflectance standards for accurate light measurement
- Virtual screen setup for precise projection alignment
- Requirements for measurement area and pixel sampling to ensure uniformity and accuracy
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Optical Performance Parameters:
- Light output and measurement of total luminous flux
- Colour performance, including chromaticity coordinates, colour gamut (CIELAB and chromaticity area), and white point chromaticity
- Illuminance and colour uniformity across the image
- Contrast ratio assessments
- Greyscale illuminance and chromaticity
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Measurement Methods:
- Step-by-step procedures for using white light output (WLO) and colour-signal white (CSW) methods
- Guidance on the use of test patterns such as RGBCMY and greyscale sequences
- Data analysis and reporting formats for consistent results
Applications
The standardized measurement protocols in IEC 62906-5-1:2021 are foundational for:
- Research and Development:
Ensures reliable comparison of new or existing laser projector technologies by applying industry-standard measurement methods.
- Manufacturing Quality Assurance:
Supports the establishment of benchmarks in production and quality control processes for laser and hybrid projection displays.
- Product Certification and Comparison:
Provides impartial, repeatable performance data for regulatory certification, product datasheets, and customer information.
- Market Evaluation:
Enables stakeholders to assess and compare products across manufacturers under consistent, recognized measurement practices.
- Academic and Industrial Laboratory Testing:
Facilitates standardized, repeatable experiments and results, driving innovation in laser display technology.
Related Standards
When applying IEC 62906-5-1:2021, several related standards are referenced or may provide complementary guidance:
- IEC 60825-1: Safety of laser products - Equipment classification and requirements
- IEC 61947-1: Measurement and documentation of key performance criteria for fixed resolution projectors
- IEC 62471-5: Photobiological safety of lamps and lamp systems – Image projectors
- IEC TR 62977-2-3: Measurements of optical properties – Multi-colour test patterns
- ISO/CIE 11664-4: Colorimetry – CIE 1976 Lab* colour space
- CIE 15: Colorimetry standard procedures
- CIE 168-2005: Evaluation criteria for extended-gamut colour encoding
Practical Value
IEC 62906-5-1:2021 brings significant value through:
- Providing a clear framework for measuring key optical parameters in laser-based projection technology.
- Supporting product development cycles, benchmarking, and quality control.
- Facilitating international trade by harmonizing test and reporting methods for laser projectors.
- Enhancing transparency and accuracy in performance claims for projectors using laser or hybrid light sources.
By adhering to this standard, organizations can ensure their laser projector measurements are accurate, reproducible, and globally recognized, supporting confidence among manufacturers, buyers, regulators, and end users.