36.4L: <i>Late‐News Paper</i>: 4.0‐in. TFT‐OLED Displays and a Novel Digital Driving Method

Inukai, Kazutaka; Kimura, Hajime; Mizukami, Mayumi; Maruyama, J.; Murakami, Satoshi; Koyama, Jun; Konuma, Toshimitsu; Yamazaki, S.

doi:10.1889/1.1833106

Cited by 45 publications

(31 citation statements)

References 6 publications

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“…3, τ meas and β of the SED model for OLED degradation are extracted from 10 samples using the digital driving pixel structure [4] of the low-temperature poly-Si TFT backplane with the following measurement conditions. The maximum duty ratio is 99.94 with 1920×1080 resolution for 10 subfields at an operating frequency of 60 Hz.…”

Section: Resultsmentioning

confidence: 99%

“…Using (4) and (5), the recursive solution of t N is given by Fig. 2 shows a simplified block diagram of the proposed compensation method.…”

Section: Compensation Methods For Oled Degradationmentioning

confidence: 99%

“…To reduce the variation in pixel luminance, a compensation circuit is included in each pixel; however, this reduces the resolution and yield of AMOLED panels. Digital driving for AMOLED displays [4], [5] has been researched to enhance the immunity to the variation in the electrical characteristics of TFTs because it uses driving TFT as a switch rather than a current source. Thus, digital driving has several advantages such as high resolution and high image uniformity due to its simple structure and high immunity to the variation of Manuscript TFT characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Lifetime Extension Method for Active Matrix Organic Light-Emitting Diode Displays Using a Modified Stretched Exponential Decay Model

Hong

Kwon

2015

IEEE Electron Device Lett.

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In this letter, we propose a compensation method for organic light-emitting diode (OLED) degradation occurring in a digital driving scheme for active-matrix OLED displays. The proposed method, in which we are the first to propose, employs the modified stretched exponential decay (SED) model to characterize the OLED degradation and compensates for the associated luminance decrease; the lifetime of an OLED panel can thereby be extended. The OLED panel is fabricated using low-temperature poly-Si thin-film transistors, and measured to verify the modified SED model and the proposed compensation method. The measurement results show that the luminance degradation with and without the proposed method is 0.3% and 6%, 4% and 17.8%, and 7.4% and 30.4%, for red, green, and blue OLEDs, respectively. This measurement is taken after 40 h of operation under a 350 cd/m 2 initial luminance. Accordingly, the proposed compensation method extends the lifetime of the OLED panel up to 72.5, 15.5, and 20.75 times longer in red, green, and blue OLEDs, respectively, compared with the conventional method. IndexTerms-OLED degradation, digital driving, compensation, AMOLED, stretched exponential decay model, lifetime extension of AMOLED.

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Section: Resultsmentioning

confidence: 99%

“…Using (4) and (5), the recursive solution of t N is given by Fig. 2 shows a simplified block diagram of the proposed compensation method.…”

Section: Compensation Methods For Oled Degradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lifetime Extension Method for Active Matrix Organic Light-Emitting Diode Displays Using a Modified Stretched Exponential Decay Model

Hong

Kwon

2015

IEEE Electron Device Lett.

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“…Data driver (b) driving schemes [8]- [10]. One of the most widely used methods is the voltage modulation circuit depicted in Fig.…”

Section: Vdd Evdd/2mentioning

confidence: 99%

Data Supply Voltage Reduction Scheme for Low-Power AMOLED Displays

Nam

Jeong

2012

ETRI J

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This paper demonstrates a new driving scheme that allows reducing the supply voltage of data drivers for lowpower active matrix organic light-emitting diode (AMOLED) displays. The proposed technique drives down the data voltage range by 50%, which subsequently diminishes in the peak power consumption of data drivers at the full white pattern by 75%. Because the gate voltage of a driving thin film transistor covers the same range as a conventional driving scheme by means of a level-shifting scheme, the low-data supply scheme achieves the equivalent dynamic range of OLED currents. The average power consumption of data drivers is reduced by 60% over 24 test images, and power consumption is kept below 25%.

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“…The nonuniformity compensation has been performed by voltage modulation, current programming, and digital driving schemes [8]- [10].…”

Section: Data Supply Voltage Reduction Schemementioning

confidence: 99%

Low power AMOLED driving scheme based on reduced data supply voltage

Song

Jeong

Nam

2012

2012 4th Asia Symposium on Quality Electronic Design (ASQED)

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This paper demonstrates a new driving scheme which allows reducing the supply voltage of data drivers for low power active matrix organic light emitting diode (AMOLED) displays. The proposed technique drives down the data voltage range by 50%, which subsequently diminishes in the peak power consumption of data drivers at the full white pattern by 75%. Because the gate voltage of a driving thin film transistor (TFT) covers the same range as a conventional one by means of a level-shifting scheme, the low data supply scheme achieves the equivalent dynamic range of OLED currents. The normalized power consumptions have been kept at the lower level than 0.25.

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36.4L: Late‐News Paper: 4.0‐in. TFT‐OLED Displays and a Novel Digital Driving Method

Cited by 45 publications

References 6 publications

Lifetime Extension Method for Active Matrix Organic Light-Emitting Diode Displays Using a Modified Stretched Exponential Decay Model

Lifetime Extension Method for Active Matrix Organic Light-Emitting Diode Displays Using a Modified Stretched Exponential Decay Model

Data Supply Voltage Reduction Scheme for Low-Power AMOLED Displays

Low power AMOLED driving scheme based on reduced data supply voltage

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