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Electrothermal and optical impacts on two-dimensional colour gamut properties of red–green–blue LED devices.

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Title: Electrothermal and optical impacts on two-dimensional colour gamut properties of red–green–blue LED devices.
Authors: Zheng, Y1,2 (AUTHOR), Liu, GH1,2 (AUTHOR), Chen, HT1,2 (AUTHOR) htchen23@qq.com, Chen, KH3 (AUTHOR), Lin, HC1,2 (AUTHOR), Chen, CH1,2 (AUTHOR), Shen, XH4 (AUTHOR)
Source: Lighting Research & Technology. May2026, Vol. 58 Issue 3, p289-307. 19p.
Subjects: LED lighting, Color temperature, Palette (Color range), Color space, Temperature control, Thermal analysis, Optical properties
Abstract: Existing colour gamut metrics for solid-state lighting and displays are typically three-dimensional descriptions that do not explicitly capture how chromatic boundaries change under electrical and thermal operating conditions. Consequently, there is a lack of quantitative understanding of two-dimensional (2D) colour gamut behaviour of RGB LED devices as a function of driving current and device temperature. This work bridges the gap by experimentally mapping the 2D colour gamut boundaries of RGB LED pixels across current and temperature ranges and proposing a model that links operating conditions to observed gamut shifts. These operating conditions are optimized by simultaneously maximizing the 2D colour gamut area and the wall-plug efficiency via a multi-objective scaled merit function. Furthermore, integrating of RGB LEDs with an added white LED (RGBW system) enabled dynamic correlated colour temperature regulation from 2000 K to 9000 K under the tested conditions, via adjustment of the white-LED drive current with compensatory RGB currents and device temperature. The 2D colour gamut variation exhibits a strong dependence on white-LED compensation, shifting from minor to significantly under specified conditions. Given this strong dependence, a novel multi-physical model integrating electrical, thermal and optical characteristics was developed to accurately predict gamuts and luminous fluxes. [ABSTRACT FROM AUTHOR]
Copyright of Lighting Research & Technology is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 193059489
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Electrothermal and optical impacts on two-dimensional colour gamut properties of red–green–blue LED devices.
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  Data: <searchLink fieldCode="AR" term="%22Zheng%2C+Y%22">Zheng, Y</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+GH%22">Liu, GH</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+HT%22">Chen, HT</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> htchen23@qq.com</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+KH%22">Chen, KH</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+HC%22">Lin, HC</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+CH%22">Chen, CH</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shen%2C+XH%22">Shen, XH</searchLink><relatesTo>4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Lighting+Research+%26+Technology%22">Lighting Research & Technology</searchLink>. May2026, Vol. 58 Issue 3, p289-307. 19p.
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  Data: <searchLink fieldCode="DE" term="%22LED+lighting%22">LED lighting</searchLink><br /><searchLink fieldCode="DE" term="%22Color+temperature%22">Color temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Palette+%28Color+range%29%22">Palette (Color range)</searchLink><br /><searchLink fieldCode="DE" term="%22Color+space%22">Color space</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+control%22">Temperature control</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+analysis%22">Thermal analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+properties%22">Optical properties</searchLink>
– Name: Abstract
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  Data: Existing colour gamut metrics for solid-state lighting and displays are typically three-dimensional descriptions that do not explicitly capture how chromatic boundaries change under electrical and thermal operating conditions. Consequently, there is a lack of quantitative understanding of two-dimensional (2D) colour gamut behaviour of RGB LED devices as a function of driving current and device temperature. This work bridges the gap by experimentally mapping the 2D colour gamut boundaries of RGB LED pixels across current and temperature ranges and proposing a model that links operating conditions to observed gamut shifts. These operating conditions are optimized by simultaneously maximizing the 2D colour gamut area and the wall-plug efficiency via a multi-objective scaled merit function. Furthermore, integrating of RGB LEDs with an added white LED (RGBW system) enabled dynamic correlated colour temperature regulation from 2000 K to 9000 K under the tested conditions, via adjustment of the white-LED drive current with compensatory RGB currents and device temperature. The 2D colour gamut variation exhibits a strong dependence on white-LED compensation, shifting from minor to significantly under specified conditions. Given this strong dependence, a novel multi-physical model integrating electrical, thermal and optical characteristics was developed to accurately predict gamuts and luminous fluxes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Lighting Research & Technology is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1177/14771535251391684
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      – Code: eng
        Text: English
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        PageCount: 19
        StartPage: 289
    Subjects:
      – SubjectFull: LED lighting
        Type: general
      – SubjectFull: Color temperature
        Type: general
      – SubjectFull: Palette (Color range)
        Type: general
      – SubjectFull: Color space
        Type: general
      – SubjectFull: Temperature control
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      – SubjectFull: Thermal analysis
        Type: general
      – SubjectFull: Optical properties
        Type: general
    Titles:
      – TitleFull: Electrothermal and optical impacts on two-dimensional colour gamut properties of red–green–blue LED devices.
        Type: main
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            NameFull: Zheng, Y
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            NameFull: Liu, GH
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            NameFull: Chen, HT
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 58
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