A Pixel Structure Using Block Emission Driving Method for High Image Quality in Active Matrix Organic Light-Emitting Diode Displays

Keum, Nack-Hyeon; Oh, Ki–Young; Hong, Seong‐Kwan; Kwon, Oh‐Kyong

doi:10.1109/jdt.2016.2594835

Cited by 14 publications

(10 citation statements)

References 8 publications

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“…The diode‐connection scheme senses the electrical characteristic variations of the driving TFT by using additional switching TFTs . It employs the progressive emission (PE) and simultaneous emission (SE) driving methods to drive the AMOLED displays.…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, the SE driving method reduces the number of TFTs by modulating the power voltage signals. Moreover, it secures long initial and compensation times for high‐resolution display because it separately performs the initial, compensation, programming, and emission operations in a frame time . On the other hand, the PE driving method progressively performs the aforementioned four operations line‐by‐line, and thereby, the initial and compensation times are typically limited by a row line time.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9][10][11][12] The external compensation method [4][5][6][7] and luminance adjusting algorithm 8 increase the system cost because of the additional logic blocks and memories for sensing the electrical characteristic variations of the LTPS TFTs and modulating the data voltage. Thus, the diode-connection scheme [9][10][11][12][13] has been widely used for small-sized AMOLED displays.…”

Section: Introductionmentioning

confidence: 99%

“…The diode-connection scheme senses the electrical characteristic variations of the driving TFT by using additional switching TFTs. [9][10][11][12][13] It employs the progressive emission (PE) and simultaneous emission (SE) driving methods to drive the AMOLED displays. In AR and VR applications, a high spatial resolution is required because they are used near the eyes.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An AMOLED pixel circuit for high image quality of 1000 ppi mobile displays in AR and VR applications

et al. 2018

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In this paper, an active‐matrix organic light‐emitting diode pixel circuit is proposed to improve the image quality of 5.87‐in. mobile displays with 1000 ppi resolution in augmented and virtual reality applications. The proposed pixel circuit consisting of three thin‐film transistors (TFTs) and two capacitors (3T2C) employs a simultaneous emission driving method to reduce the number of TFTs and the emission current error caused by variations in threshold voltage (Vth) and subthreshold slope (SS) of the low‐temperature polycrystalline silicon TFTs. Using the simultaneous emission driving method, the compensation time is increased to 90 μs from 6.5 μs achieved in the conventional six TFTs and one capacitor (6T1C) pixel circuit. Consequently, the emission current error of the proposed 3T2C pixel circuit was reduced to ±3 least significant bit (LSB) from ±12 LSB at the 32nd gray level when the variations in both the Vth and SS are ±4σ. Moreover, both the crosstalk errors due to the parasitic capacitances between the adjacent pixel circuits and due to the leakage current were achieved to be less than ±1 LSB over the entire gray level. Therefore, the proposed pixel circuit is very suitable for active‐matrix organic light‐emitting diode displays requiring high image quality.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An AMOLED pixel circuit for high image quality of 1000 ppi mobile displays in AR and VR applications

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…The external compensation method [4][5][6][7] and luminance adjusting algorithm [8] increase the system cost due to the additional logic blocks and memories for sensing the electrical characteristic variation of the driving TFTs and modulating the data voltage. Therefore, the diode-connection schemes [9][10][11][12][13] have been widely used for small-area AMOLED displays. To drive the AMOLED displays with diode-connection scheme, the progressive emission (PE), block emission (BE), and simultaneous emission (SE) driving methods have been used [12,13].…”

Section: Introductionmentioning

confidence: 99%

23‐1: Distinquished Student Paper: An AMOLED Pixel Circuit for 1000 ppi and 5.87‐inch Mobile Displays with AR and VR Applications

Keum

Chai

Hong

et al. 2018

Symp Digest of Tech Papers

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In this paper, an active-matrix organic light emitting diode (AMOLED) pixel circuit is proposed for 1000 ppi and 5.87-inch mobile displays with augmented and virtual reality applications. The proposed pixel circuit consisting of 3 thin-film transistors (TFTs) and 2 capacitors employs a simultaneous emission driving method to reduce the number of TFTs. The simulation results of the proposed pixel circuit showed that the emission current errors caused by the threshold voltage variation of driving TFT and crosstalk error were less than ±0.4 LSB and ±1LSB, respectively, over the entire gray level. Therefore, the proposed pixel circuit is highly suitable for AMOLED displays.

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12‐4: 1000PPI LTPS OLED Display for VR Application

Wang

et al. 2020

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We developed 1000PPI OLED display based on LTPS to improve the RT and MPRT and solve the screen door effect. Different OLED pixel circuits including basic 3T1C and driving schemes consist of incessant and intermittent emission were compared and applied to achieve the key spec for VR applications. We studied the optical correction for Mura improvement and the driving TFT stabilization treatment for luminance depression optimization.

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A Pixel Structure Using Block Emission Driving Method for High Image Quality in Active Matrix Organic Light-Emitting Diode Displays

Cited by 14 publications

References 8 publications

An AMOLED pixel circuit for high image quality of 1000 ppi mobile displays in AR and VR applications

An AMOLED pixel circuit for high image quality of 1000 ppi mobile displays in AR and VR applications

23‐1: Distinquished Student Paper: An AMOLED Pixel Circuit for 1000 ppi and 5.87‐inch Mobile Displays with AR and VR Applications

12‐4: 1000PPI LTPS OLED Display for VR Application

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