24‐4: <i>Distinguished Paper:</i> High Refresh Rate and Low Power Consumption AMOLED Panel Using Top‐gate n‐Oxide and p‐LTPS TFTs

Yonebayashi, Ryo; Tanaka, Kohei; Okada, Kuniaki; Yamamoto, Kaoru; Yamamoto, Keiichi; Uchida, Seiichi; Aoki, Tetsuhiko; Takeda, Yasuhiko; Furukawa, Hajime; Ito, Kazuatsu; Katoh, Hiromi; Nakamura, Wataru

doi:10.1002/sdtp.13877

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…Finally, we design the layout for the proposed pixel using the LTPO TFT process [17], [21], [25][26]. Fig.…”

Section: Pixel Layout and Fabrication Resultsmentioning

confidence: 99%

“…For comparison purpose, the conventional PCVP LTPO AMOLED pixel circuit proposed by Sharp [21] is also shown in Fig. 1(b), which has two n-type oxide TFTs (T03 and T05), five p-type LTPS TFTs (T01-T02, T04, and T06-T07) and one storage capacitor C01.…”

Section: Proposed Pixel Circuit and Operationmentioning

confidence: 99%

“…Apple Inc. proposed a Parallel-Compensation Voltage Programming (PCVP) pixel circuit consisting of n-type LTPS and n-type IGZO TFTs [20]. Ryo [21] and Luo [22] also proposed similar PCVP pixel circuits based on p-type LTPS and n-type IGZO TFTs. Those pixel circuits can operate at a wide frequency range from 1 Hz to 120 Hz, to achieve a reduction in power consumption when working at the low frequency end.…”

Section: Introductionmentioning

confidence: 99%

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A Low Power and IR Drop Compensable AMOLED Pixel Circuit Based on Low-Temperature Poly-Si and Oxide (LTPO) TFTs Hybrid Technology

Qiu

Wang

et al. 2022

IEEE J. Electron Devices Soc.

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In this paper, an AMOLED pixel circuit based on low-temperature poly-crystalline silicon and oxide (LTPO) thin-film transistors (TFTs) hybrid technology is proposed, which features only two transistors in a serial connection with OLED. The power supply can thus be reduced by 25~30% in the "Always-on-Display" (AOD) mode compared with the earlier LTPO pixel circuits which usually have three transistors in the current path and need a higher supply voltage. Furthermore, in addition to a strong suppressing ability to Vth variations/shift, the proposed pixel circuit has an excellent compensation ability for current-resistance voltage drops (i.e. IR drop), which is also superior to the earlier LTPO ones where the IR drop has to be compensated externally. Therefore, the proposed LTPO pixel circuit is able to provide AMOLED displays with lower power consumption and higher display performance than the earlier ones.

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“…Finally, we design the layout for the proposed pixel using the LTPO TFT process [17], [21], [25][26]. Fig.…”

Section: Pixel Layout and Fabrication Resultsmentioning

confidence: 99%

Section: Proposed Pixel Circuit and Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Low Power and IR Drop Compensable AMOLED Pixel Circuit Based on Low-Temperature Poly-Si and Oxide (LTPO) TFTs Hybrid Technology

Qiu

Wang

et al. 2022

IEEE J. Electron Devices Soc.

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“…pixel circuits, scan drivers, emission control drivers needed for refresh, and hold image data) has received less attention. However, more recently, optimizing driving power consumption in AMOLEDs is recently attracting more attention [4][5], with new developments such as reducing display refresh rates without a perceivable flicker by combining low temperature poly-silicon (LTPS) transistors with metal oxide transistors, so-called LTPO technologies. The pivot of engineering focus is due to the increasing impact of driving power consumption, PDriving, to the overall display power consumption, PDisplay.…”

Section: Introductionmentioning

confidence: 99%

P‐1: Uni‐Color Column Line Pentile‐Type Pixel Arrangement Design for Low Driving Power Consumption AMOLED Displays

Choi

Song

Chang

et al. 2022

Symp Digest of Tech Papers

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As active‐matrix organic light emitting diode (AMOLED) displays have rapidly become the primary choice for high performance mobile devices, reducing their power consumption to enable long battery life continues to be a very important challenge. In particular, the power consumption required to drive the display electronic circuits has recently increased significantly due to the industry trends for high resolution, high refresh rates, and high screen aspect ratio. In this paper, we propose a uni‐color pixel column design for the typical Pentile‐type pixel arrangement used for AMOLED displays in order to lower the driving power consumption. Considering a QHD+, 6.x inch‐diagonal smartphone application, the estimated power saving benefits of the proposed architecture are 10% for averaged image contents, and up to 42% for red/blue saturated images in the analog driving power consumption.

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“…It is shown that the operation of the pixel circuit needs scan signals (n type or p type signal with certain pulse width) to enable compensation and data writing for each row and emission (EM) signal to turn corresponding OLED device off during compensation and data writing period, and after that the emission signal controls the OLED device on and emit light. [1] To modulate low gray-scale brightness, the emission signal in some display cases should be a pulse-width-modulated (PWM) one, which could adjust the panel's emission duration [2,3] .…”

Section: Introductionmentioning

confidence: 99%

10.2: A Novel GOA Providing Both Emission‐controlled PWM Signal and Switch‐controlled Scan Signal for AMOLED Displays

Wang

Feng

Liu

et al. 2021

Symp Digest of Tech Papers

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For the purpose of simplifying the gate driver on array for AMOLED panels using p‐LTPS or LTPO TFTs, a novel shift register module circuit was developed. Integrating the module with the common‐used EM GOA, a simplified GOA integrated both functions for generating emission‐controlled n‐type EM signal and switch‐controlled scan signal was developed. The feasibility of the proposed circuit was demonstrated through simulations results.

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24‐4: Distinguished Paper: High Refresh Rate and Low Power Consumption AMOLED Panel Using Top‐gate n‐Oxide and p‐LTPS TFTs

Cited by 9 publications

References 15 publications

A Low Power and IR Drop Compensable AMOLED Pixel Circuit Based on Low-Temperature Poly-Si and Oxide (LTPO) TFTs Hybrid Technology

A Low Power and IR Drop Compensable AMOLED Pixel Circuit Based on Low-Temperature Poly-Si and Oxide (LTPO) TFTs Hybrid Technology

P‐1: Uni‐Color Column Line Pentile‐Type Pixel Arrangement Design for Low Driving Power Consumption AMOLED Displays

10.2: A Novel GOA Providing Both Emission‐controlled PWM Signal and Switch‐controlled Scan Signal for AMOLED Displays

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