电热耦合作用下Mini/Micro-LED三基色色品坐标变化规律研究

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中图分类号：TN312.8 文献标识码：A DOI：10.37188/CJL.20250086 CSTR：32170.14.CJL.20250086

Experimental Investigation ofRGB Chromaticity Shift in Mini/Micro-LEDs Under Electro-thermal Coupling Effect

（1.Engineerngsechterfcroaotleoteadices，strfuatiouKyb SemiconductorateialsdAplications，CollgeoficalSieneandechog，imenUniersity，men3ia；

2.XiamenProducts Quality Supervisionand Inspection Institute，Xiamen 361ooo，China;

3.FutureDisplayInstitute，TanKahKeeInnovationLaboratory，Xiamen36loOO，China） *Corresponding Authors，E-mail：jinchaili@xmu.edu.cn；k_huang@xmu.edu.cn

Abstract：The expanding application scenariosof Mini/Micro-light emiting diode display technology requireoperation across wide temperature ranges and current density conditions.However，variations in ambient temperature and driving current inevitablyalterLEDemissioncharacteristics，leading tochromaticitycoordinateshiftsinRed-GreenBlue primariesand distortion of thecolor gamut，significantly degrading displaycolorperformance.Inthis work，the electro-thermal coupling efects onchromaticitycoordinateevolutionandtheresultantDigital Cinema Initiatives-Protocol3color gamut coverageratioaresystematically studied byanalyzing theemisionoptical propertiesof red， green，and blue Mini/Micro-LEDsunder diferenttemperatures and current densities.Experimental results demonstrate that temperature elevation induces synchronous chromaticitycoordinate shifts acrossallthree primary colors， withonlya minor reduction in color gamut coverage（less than 2% ）.In contrast，increased current density causes significant color gamut degradation，reaching a maximum reduction of 15% .These findings highlight that current densityvariation exerts a moresevere impact oncolor performance than ambient temperature.Consequently，in developing Mini/Micro-LED displays，alongside thermal management strategies to mitigate temperature efects，it is criticalto optimize current regulation schemes and implement dynamiccolor gamut compensation algorithms to counteractcurrent-induced chromaticity deviations，thereby enhancing overall displayquality.

KeyWords：Mini/Micro-light emittingdiode；color coordinates；color gamu

1引言

微型发光二极管具有高亮度、高能效、快速响应、宽工作温区、高可靠性以及长寿命等卓越性能，其芯片尺寸通常小于 200μm[1-5] 。（剩余17365字）