Lifetime of OLED-on-Silicon Microdisplay Based on Luminance Decay Model

Yuan Ji; Shuping Gong; Tingzhou Mu; Wendong Chen; Kaiwen Zhang

doi:10.3788/AOS202141.1923003

Journals >Acta Optica Sinica >Volume 41 >Issue 19 >Page 1923003 > Article

Acta Optica Sinica
Vol. 41, Issue 19, 1923003 (2021)

Lifetime of OLED-on-Silicon Microdisplay Based on Luminance Decay Model

Yuan Ji^1,2,*, Shuping Gong¹, Tingzhou Mu², Wendong Chen², and Kaiwen Zhang¹

Author Affiliations

¹Microelectronic Research and Development Center, Shanghai University, Shanghai 200072, China

²School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China

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DOI: 10.3788/AOS202141.1923003 Cite this Article Set citation alerts

Yuan Ji, Shuping Gong, Tingzhou Mu, Wendong Chen, Kaiwen Zhang. Lifetime of OLED-on-Silicon Microdisplay Based on Luminance Decay Model[J]. Acta Optica Sinica, 2021, 41(19): 1923003 Copy Citation Text

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Fig. 1. Actual decay under the same initial brightness and different duty cycle

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Fig. 2. Establishment and verification process of luminance decay model

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Fig. 3. Experimental samples and test instrument. (a) Sample pieces; (b) lighted sample piece; (c) luminance meter

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Fig. 4. Fitting effect of luminance decay model. (a) DDDM; (b) ALEM; (c) MSED; (d) proposed model

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Fig. 5. Recovery effect of OLED-on-silicon devices under different duty cycles

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Experimental	F	S_i	M
1	U=5 V	D_now=12.5%, 37.5%, 62.5%, 87.5%, 100%	L_ik(t)
2	U=5 V	D_now=25%, 50%, 75%	L_ik(t)
3	L₀=4600 cd/m²	U=6.38 V, D_now=25%U=5.93 V, D_now=50%U=5.19 V, D_now=75%	L_ik(t)

Table 1. Setting of experimental parameters

Resolution /(pixel×pixel)	Color	Chip size/cm	Single pixel size /(μm×μm)	PPI
1280×1024	Monochrome	1.651	10×10	2500

Table 2. Specifications for OLED-on-silicon microdisplays

t/h	L(t) /(cd·m^-2)
	Experimental 1				Experimental 2				Experimental 3
	D_now=12.5%	D_now=37.5%	D_now=62.5%	D_now=87.5%	D_now=100%	D_now=25%	D_now=50%	D_now=75%	D_now=25%	D_now=50%	D_now=75%
0	508	1666	2787	4091	4670	1039	2138	3451	4627	4643	4656
24	474	1413	2216	3090	3396	918	1753	2671	4510	3840	3491
48	459	1311	1998	2720	2939	868	1602	2378	3891	3369	2975
72	447	1236	1841	2462	2624	830	1492	2171	3744	3316	2955
96	438	1175	1717	2260	2382	799	1405	2009	3770	3385	2743
120	430	1124	1614	2095	2185	773	1331	1874	3361	2993	2379
144	422	1079	1525	1955	2020	750	1268	1760	3336	2931	2390
168	416.	1039	1448	1834	1878	729	1212	1660	3136	2888	2374

Table 3. Partial measured data

Parameter	DDDM			ALEM			MSED			Proposed model
Parameter	D_now=25%	D_now=50%	D_now=75%	D_now=25%	D_now=50%	D_now=75%	D_now=25%	D_now=50%	D_now=75%	D_now=25%	D_now=50%	D_now=75%
μ	0.0575	0.0396	0.1974	0.0198	0.0445	0.0290	0.0540	0.0451	0.0304	0.0106	0.0407	0.0285
R²	0.7697	0.9482	-0.2345	0.9726	0.9346	0.9734	0.7971	0.9329	0.9708	0.9922	0.9453	0.9743

Table 4. Predicting effect of luminance decay model under general driving conditions

Parameter	Measurement			TSED			Proposed model
Parameter	D_now=25%	D_now=50%	D_now=75%	D_now=25%	D_now=50%	D_now=75%	D_now=25%	D_now=50%	D_now=75%
Lifetime difference /h	292.5	193.9	48.8	7.1	7.5	7.9	481.5	142.1	51.1
Relative error /%				97.6	96.1	83.8	64.6	26.7	4.7

Table 5. Prediction effect of luminance decay model with the same initial brightness

Parameter	Analog drive	PWM drive
D_now /%		87.5	62.5	37.5	12.5
Lifetime /h	80.0	128.1	186.7	342.7	1671.5

Table 6. Lifetime of OLED-on-silicon devices under PWM and analog drive

Yuan Ji, Shuping Gong, Tingzhou Mu, Wendong Chen, Kaiwen Zhang. Lifetime of OLED-on-Silicon Microdisplay Based on Luminance Decay Model[J]. Acta Optica Sinica, 2021, 41(19): 1923003

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