Search results for: Po-Syun Chen

Items from 1 to 20 out of 23 results

article

UHD AMOLED Driving Scheme of Compensation Pixel and Gate Driver Circuits Achieving High-Speed Operation

Chih-Lung Lin, Po-Syun Chen, Ming-Yang Deng, Chia-En Wu, more

IEEE Journal of the Electron Devices Society > 2018 > 6 > 1 > 26 - 33

This paper presents a new driving scheme for active-matrix organic light-emitting diode displays. A pixel circuit based on this driving scheme was developed to compensate for the threshold voltage and mobility variations of low-temperature polycrystalline-silicon thin-film transistors (TFTs), eliminate image flickering and current-resistance voltage drops, and suit ultrahigh-definition (UHD) resolution...

article

Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect

Chih-Lung Lin, Po-Syun Chen, Po-Cheng Lai, Chih-Cheng Hsu, more

IEEE Electron Device Letters > 2017 > 38 > 12 > 1673 - 1675

This letter discusses the frequency effect of polymer-stabilized blue-phase liquid crystal (BPLC) on the data voltages of a conventional pixel circuit and develops a new pixel buffer that exploits amorphous indium–gallium–zinc-oxide thin-film transistors (TFTs). During high-speed operations, BPLC seriously distorts data voltages because of the highly frequency-dependent dielectric anisotropy. To lessen...

chapter

Novel design of auto-compensation for TFT V_TH and high-speed driving in active-matrix OLED displays

Wen-Ching Chiu, Po-Syun Chen, Chun-Ming Lu, Ming-Xun Wang, more

2017 24th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) > 54 - 57

2017 24th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

This work presents a new pixel circuit composed of six low-temperature polycrystalline-silicon (LTPS) thin-film transistors (TFTs) and two capacitors for active-matrix organic light-emitting diode (AMOLED) displays. New auto-compensation method is developed by cancelling the reference voltage which is required in general compensation circuits, thus improving the aperture ratio of pixel. By adopting...

chapter

Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays

Chih-Cheng Hsu, Chun-Ming Lu, Po-Chun Lai, Po-Syun Chen, more

2017 24th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) > 147 - 150

2017 24th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

This work proposes a new pixel circuit of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance...

article

A Hydrogenated Amorphous Silicon Thin-Film Transistor Optical Pixel Sensor for Ameliorating Influences of Ambient Light and Reflected Light

Chih-Lung Lin, Po-Syun Chen, Ching-Heng Chang, Jian-Shen Yu, more

IEEE Journal of the Electron Devices Society > 2017 > 5 > 4 > 262 - 265

This paper proposes a hydrogenated amorphous silicon thin-film transistorbased (a-Si:H TFT) optical pixel sensor. The proposed optical sensor compensates for variations of ambient light using photo TFTs that incorporate with three primary color filters, and a designed active load is utilized to release the photocurrent from the noise of reflected light. Measurement results reveal that the proposed...

article

49‐2: Design of a‐Si:H Bidirectional Gate Driver Circuit Using Time Division Driving Method for In‐Cell Touch Active‐Matrix Liquid Crystal Displays

Ming-Yang Deng, Meng-Chieh Tsai, Yung-Chih Chen, Po-Syun Chen, more

SID Symposium Digest of Technical Papers > 48 > 1 > 734 - 737

This work presents a new bidirectional gate driver circuit using hydrogenated amorphous silicon (a‐Si:H) thin‐film transistors (TFTs) for applying to in‐cell touch panels. The proposed circuit allows the touch panel to pause the display operation to perform the touch sensing operations to increase the touch reporting rate. Furthermore, the proposed circuit can avoid severe threshold voltage shift...

chapter

Novel maximum power point tracker for PV systems using interval type-2 fuzzy logic controller

Cheng-Yan Chuang, Po-Syun Chen, Chin-Cheng Hsu, Jhih-Yu Li, more

2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) > 1505 - 1507

2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)

This work presents a novel photovoltaic (PV) system with an intelligent maximum power point tracking (MPPT) controller. This Intelligent PV system consists of a solar model, flyback converter, digital signal processor, and DC electronic load. The MPPT controller based on the interval type-2 fuzzy logic control (type-2 FLC) can achieve fast tracking of the maximum power point and prevents interference...

article

Pixel Circuit With Parallel Driving Scheme for Compensating Luminance Variation Based on a-IGZO TFT for AMOLED Displays

Chih-Lung Lin, Po-Chun Lai, Po-Cheng Lai, Po-Syun Chen, more

Journal of Display Technology > 2016 > 12 > 12 > 1681 - 1687

This work proposes a new pixel structure based on amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) and a parallel addressing scheme for high-resolution active-matrix organic light-emitting diode (AMOLED) displays. The proposed circuit compensates for the nonuniformity of luminance that is caused by shifts in the threshold voltage (

${{V}}_{{\rm{TH}}}$

) and mobility of driving...

article

Optical Pixel Sensor of Hydrogenated Amorphous Silicon Thin-Film Transistor Free of Variations in Ambient Illumination

Chih-Lung Lin, Chia-En Wu, Po-Syun Chen, Po-Cheng Lai, more

IEEE Journal of Solid-State Circuits > 2016 > 51 > 11 > 2777 - 2785

This paper presents a primary color optical pixel sensor circuit that utilizes hydrogenated amorphous silicon thin-film transistors (TFTs). To minimize the effect of ambient light on the sensing result of optical sensor circuit, the proposed sensor circuit combines photo TFTs with color filters to sense a primary color optical input signal. A readout circuit, which also uses thin-film transistors,...

article

Gate Driver Circuit Using Pre-Charge Structure and Time-Division Multiplexing Driving Scheme for Active-Matrix LCDs Integrated with In-Cell Touch Structures

Chih-Lung Lin, Ming-Yang Deng, Chia-En Wu, Po-Syun Chen, more

Journal of Display Technology > 2016 > 12 > 11 > 1238 - 1241

This paper presents a new gate driver circuit for active-matrix liquid crystal displays with an in-cell touch structure designed by hydrogenated amorphous silicon thin-film transistors. To increase the reporting rate of a touch panel, the proposed circuit can be used to pause display operations to perform touch sensing operations several times per frame. The proposed circuit exploits a pre-charge...

article

Hydrogenated Amorphous Silicon Thin-Film Transistor-Based Optical Pixel Sensor With High Sensitivity Under Ambient Illumination

Chih-Lung Lin, Chia-En Wu, Po-Syun Chen, Ching-Heng Chang, more

IEEE Electron Device Letters > 2016 > 37 > 11 > 1446 - 1449

This letter develops an optical pixel sensor that is based on hydrogenated amorphous silicon thin-film transistors. Exploiting the photo sensitivity of the photo TFTs and combining different color filters, the proposed sensor can sense an optical input signal of a specified color under high ambient illumination conditions. Measurements indicate that the proposed pixel sensor effectively reacts to...

article

New 2-D/3-D Switchable Pixel Circuit to Achieve Uniform OLED Luminance for High-Speed AMOLED Displays

Chih-Lung Lin, Po-Chun Lai, Po-Cheng Lai, Po-Syun Chen

IEEE Journal of the Electron Devices Society > 2016 > 4 > 6 > 436 - 440

This paper presents a new 2-D/3-D switchable pixel circuit based on low-temperature polycrystalline-silicon thin-film transistors (TFTs) at a frame rate of 240 Hz for active-matrix organic light-emitting diode (OLED) displays. The proposed circuit compensates for threshold voltage (

${\mathrm{ V}}_{\mathrm{ TH}} $

) variations of TFTs,

${\mathrm{ V}}_{\mathrm{ DD}} $

IR drops, and degradation of...

chapter

New intelligent glass curtain with IT2FLC for conversion efficiency enhancement of PV system

Cheng-Yan Chuang, Po-Syun Chen, Fu-Hsing Chen, Ting-Ching Chu, more

2016 IEEE 5th Global Conference on Consumer Electronics > 1 - 2

2016 IEEE 5th Global Conference on Consumer Electronics

This work presents a novel photovoltaic (PV) system on intelligent glass curtain. The PV system with an intelligent maximum power point tracking (MPPT) algorithm can accurately track the maximum power point of PV panel and continuously supplies maximum power. The intelligent MPPT algorithm based on the interval type-2 fuzzy logic control (IT2FLC) is implemented to track the maximum power point under...

article

Insertion of Simple Structure Between Gate Driver Circuits to Prevent Stress Degradation in In-Cell Touch Panel Using Multi-V Blanking Method

Chih-Lung Lin, Chia-En Wu, Ching-En Lee, Fu-Hsing Chen, more

Journal of Display Technology > 2016 > 12 > 10 > 1040 - 1042

This letter proposes a simple structure for in-cell touch thin-film transistor liquid crystal displays (TFT-LCDs) that are driven by the multi-V blanking method. The proposed structure is designed to activate the gate driver circuit after the touch sensing period to prevent the driving TFT of the gate driver circuit from exhibiting long-term stress during this period. Measured electrical characteristics...

chapter

Novel pixel circuit to enlarge operation voltage for blue-phase liquid crystal displays

Ching-Heng Chang, Chih-Lung Lin, Po-Syun Chen

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) > 75 - 77

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

A novel pixel circuit composed of four thin-film transistors (TFTs) and two capacitors is proposed for blue-phase liquid crystal displays (BPLCDs). The capacitive coupling method can enlarge the voltage across BPLC, and the pre-charging method shortens the charging time effectively. Four voltage levels of V_BIAS are established for attaining desired voltage, when V_DATA supplied by practical source...

chapter

Novel a-IGZO pixel circuit adopting external circuit for use in 3-D AMOLED displays

Ming-Xun Wang, Po-Syun Chen, Chih-Lung Lin

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) > 69 - 71

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

A new stereoscopic three-dimensional (3-D) active-matrix organic light-emitting diode (AMOLED) pixel circuit composed of amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) is presented in this paper. The proposed pixel circuit has simple structure by adopting external circuit shared in one column and successfully compensates for the threshold voltage variation of a-IGZO TFTs....

chapter

Novel bi-direction gate driver circuit for active-matrix LCDs with in-cell touch structures

Po-Syun Chen, Yen-Ting Liu, Chih-Lung Lin

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) > 31 - 32

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

This work proposes a bi-direction hydrogen amorphous silicon (a-Si:H) gate driver circuit, which can be properly applied to the active-matrix liquid-crystal displays with integrated touch panels. The fluctuations of display control signals increase the noise of the touch panel during touch sensing period. To solve this problem, the proposed circuit allows the LCDs to pause at any column until the...

article

Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation

Chih-Lung Lin, Po-Syun Chen, Po-Chun Lai, Ting-Ching Chu, more

Journal of Display Technology > 2016 > 12 > 12 > 1664 - 1667

This letter presents a new pixel circuit reaching simultaneous compensation for a threshold voltage (

$V_{{\rm{TH}}}$

) shift of normally-<sc>off</sc> and normally-<sc> on</sc> a-IGZO TFTs, as well as luminance drop of an OLED device for ultrahigh-definition active-matrix organic light-emitting diode displays. Simulation results demonstrate the successful detection of a 1 V...

article

New a-IGZO Pixel Circuit Composed of Three Transistors and One Capacitor for Use in High-Speed-Scan AMOLED Displays

Chih-Lung Lin, Fu-Hsing Chen, Chia-Che Hung, Po-Syun Chen, more

Journal of Display Technology > 2015 > 11 > 12 > 1031 - 1034

An amorphous indium-gallium-zinc-oxide (a-IGZO) pixel circuit with three transistors and one capacitor is proposed for use in high-speed-scan active-matrix organic light-emitting diode (AMOLED) displays. The proposed pixel circuit can compensate<?Pub /_nolinebreak ?> for the threshold voltage shifts in both normally-off and normally-on a-IGZO TFTs. Based on the simulation results with $\pm$ 1 V...

article

a-InGaZnO Active-Matrix Organic LED Pixel Periodically Detecting Thin-Film Transistor Threshold Voltage Once for Multiple Frames

Chih-Lung Lin, Yen-Ting Liu, Ching-En Lee, Po-Syun Chen, more

IEEE Electron Device Letters > 2015 > 36 > 11 > 1166 - 1168

This letter proposes a new voltage-programmed amorphous indium-gallium-zinc-oxide (a-IGZO) thin-film transistor (TFT) pixel circuit for active-matrix organic light-emitting diode (AMOLED) displays. The proposed circuit detects the

$\text{V}_{\mathrm {TH}}$

of the driving TFT only in a periodically executed compensation frame, allowing the other frames to perform only data input and emission for...

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article (16)
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Keywords

THIN FILM TRANSISTORS (20)
THRESHOLD VOLTAGE (13)
ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODES (12)
ACTIVE-MATRIX ORGANIC LIGHT-EMITTING DIODE (AMOLED) (8)
THIN-FILM TRANSISTOR (TFT) (6)
AMORPHOUS INDIUM-GALLIUM-ZINC-OXIDE (A-IGZO) (5)
INTEGRATED CIRCUIT MODELING (5)
DRIVER CIRCUITS (4)
LOGIC GATES (4)
CAPACITORS (3)
DEGRADATION (3)
IN-CELL TOUCH (3)
LIGHTING (3)
OPTICAL SENSOR (3)
OPTICAL SENSORS (3)
SENSORS (3)
STRESS (3)
THIN FILM TRANSISTORS (TFTS) (3)
VOLTAGE MEASUREMENT (3)
ALGORITHM DESIGN AND ANALYSIS (2)
DISCHARGES (ELECTRIC) (2)
ERROR ANALYSIS (2)
GATE DRIVER (2)
HYDROGENATED AMORPHOUS SILICON (A-SI:H) (2)
INTERVAL TYPE-2 FUZZY LOGIC (2)
LIQUID CRYSTAL DISPLAYS (2)
MAXIMUM POWER POINT TRACKERS (2)
MAXIMUM POWER POINT TRACKING (2)
OPTICAL FILTERS (2)
PHOTOCONDUCTIVITY (2)
PHOTOVOLTAIC SYSTEM (2)
PHOTOVOLTAIC SYSTEMS (2)
PIXEL SENSOR CIRCUIT (2)
SIGNAL PROCESSING ALGORITHMS (2)
THREE-DIMENSIONAL DISPLAYS (2)
A-SI:H TFT (1)
ADAPTIVE OPTICS (1)
APERTURES (1)
BIDIRECTIONAL CONTROL (1)
BLANKING (1)
BRIGHTNESS (1)
CHARGE PUMP (1)
CHARGE PUMPS (1)
CMOS INTEGRATED CIRCUITS (1)
COLOR (1)
CONTROL SYSTEMS (1)
COUPLINGS (1)
DISTORTION (1)
EDUCATIONAL INSTITUTIONS (1)
ELECTRICAL ENGINEERING (1)
EXTERNAL DRIVING CIRCUIT (1)
GATE DRIVER CIRCUIT (1)
GLASS (1)
GLASS CURTAIN (1)
HIGH FREQUENCY EFFECT (1)
HIGH-SPEED-SCAN (1)
HYDROGENATED AMORPHOUS SILICON (A-SI:H) THIN-FILM TRANSISTOR (TFT) (1)
HYDROGENATED AMORPHOUS SILICON THIN FILM TRANSISTORS (A-SI:H TFTS) (1)
INCREMENTAL CONDUCTANCE (1)
INTEGRATED CIRCUIT (1)
INTEGRATED SENSOR (1)
INTERFERENCE (1)
LEAKAGE CURRENTS (1)
LIGHT EMITTING DIODES (1)
LONG-TERM STRESS (1)
LOW-TEMPERATURE POLYCRYSTALLINE SILICON (LTPS) (1)
LOW-TEMPERATURE POLYCRYSTALLINE-SILICON (LTPS) (1)
LOW-TEMPERATURE POLYCRYSTALLINE-SILICON THIN-FILM TRANSISTORS (LTPS TFTS). (1)
LOW-TEMPERATURE POLYCRYSTALLINESILICON THIN-FILM TRANSISTORS (LTPS TFTS) (1)
MATHEMATICAL MODEL (1)
METEOROLOGY (1)
NIOBIUM (1)
OPTICAL DEVICE FABRICATION (1)
OPTICAL IMAGING (1)
OPTICAL REFLECTION (1)
PERIODIC STRUCTURES (1)
PIXEL BUFFER (1)
PIXEL CIRCUIT (1)
PIXEL SENSOR (1)
POLYMERS (1)
POLYMERSTABILIZED BLUE-PHASE LIQUID CRYSTAL (PS-BPLC) (1)
PROGRAMMING (1)
SHIFT REGISTER (1)
STEREO IMAGE PROCESSING (1)
SWITCHING CIRCUITS (1)
TFTS (1)
THRESHOLD VOLTAGE (<NAMED-CONTENT XMLNS:XLINK="HTTP://WWW.W3.ORG/1999/XLINK" XMLNS:ALI="HTTP://WWW.NISO.ORG/SCHEMAS/ALI/1.0/" XMLNS:MML="HTTP://WWW.W3.ORG/1998/MATH/MATHML" XMLNS:XSI="HTTP://WWW.W3.ORG/2001/XMLSCHEMA-INSTANCE" CONTENT-TYPE="MATH" XLINK:TYPE="SIMPLE"> $V {\RM TH}$ </NAMED-CONTENT>) (1)
TIME-FREQUENCY ANALYSIS (1)
TIMING (1)
TRANSIENT ANALYSIS (1)
VOLTAGE CONTROL (1)
VOLTAGE FLUCTUATIONS (1)
YTTRIUM (1)
more

Data set

ieee (22)
Wiley (1)

INFONA - science communication portal

Search results for: Po-Syun Chen

UHD AMOLED Driving Scheme of Compensation Pixel and Gate Driver Circuits Achieving High-Speed Operation

Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect

Novel design of auto-compensation for TFT V_TH and high-speed driving in active-matrix OLED displays

Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays

A Hydrogenated Amorphous Silicon Thin-Film Transistor Optical Pixel Sensor for Ameliorating Influences of Ambient Light and Reflected Light

49‐2: Design of a‐Si:H Bidirectional Gate Driver Circuit Using Time Division Driving Method for In‐Cell Touch Active‐Matrix Liquid Crystal Displays

Novel maximum power point tracker for PV systems using interval type-2 fuzzy logic controller

Pixel Circuit With Parallel Driving Scheme for Compensating Luminance Variation Based on a-IGZO TFT for AMOLED Displays

Optical Pixel Sensor of Hydrogenated Amorphous Silicon Thin-Film Transistor Free of Variations in Ambient Illumination

Gate Driver Circuit Using Pre-Charge Structure and Time-Division Multiplexing Driving Scheme for Active-Matrix LCDs Integrated with In-Cell Touch Structures

Hydrogenated Amorphous Silicon Thin-Film Transistor-Based Optical Pixel Sensor With High Sensitivity Under Ambient Illumination

New 2-D/3-D Switchable Pixel Circuit to Achieve Uniform OLED Luminance for High-Speed AMOLED Displays

New intelligent glass curtain with IT2FLC for conversion efficiency enhancement of PV system

Insertion of Simple Structure Between Gate Driver Circuits to Prevent Stress Degradation in In-Cell Touch Panel Using Multi-V Blanking Method

Novel pixel circuit to enlarge operation voltage for blue-phase liquid crystal displays

Novel a-IGZO pixel circuit adopting external circuit for use in 3-D AMOLED displays

Novel bi-direction gate driver circuit for active-matrix LCDs with in-cell touch structures

Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation

New a-IGZO Pixel Circuit Composed of Three Transistors and One Capacitor for Use in High-Speed-Scan AMOLED Displays

a-InGaZnO Active-Matrix Organic LED Pixel Periodically Detecting Thin-Film Transistor Threshold Voltage Once for Multiple Frames

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