플라즈마 디스플레이의 명암비 향상을 위한 이중-기울기 초기화 구동 파형 = Dual-Slope Ramp Reset Waveform to Improve Dark Room Contrast Ratio in AC-PDPs

다국어 초록 (Multilingual Abstract)

Plasma television (TV) is believed to be a promising candidate for large area (> 40 inch), self-emitting, digital high definition home theater TVs. Therefore, improving the image quality generated by a plasma TV is a critical issue for current PDP technology. In particular, improving the dark room contrast ratio is a very important factor contributing to the high image quality required for a plasma home theater TV. As a result, a lot of research has focused on reducing the background luminance during a reset period.
In this paper, a new dual-slope ramp (DSR) reset waveform is proposed to improve the dark room contrast ratio in AC-PDPs. The proposed reset waveform has two different voltage slopes during a ramp-up period. The first voltage slope lower than the conventional ramp voltage slope plays a role in producing the priming particles under the low background luminance, which is considered to be a kind of pre-reset discharge. On the other hand, the second voltage slope higher than the conventional ramp voltage slope produces a stable reset discharge due to the presence of the priming particles, but gives rise to a slight increase in the background luminance. Thus, a bias voltage is also applied during a part of the second voltage-slope period to adjust the background luminance and address discharge characteristics. As a result, the proposed dual-slope reset waveform can lower the background luminance without causing the discharge instability, thereby improving the high dark room contrast ratio of an AC-PDP without reducing the address voltage margin.
The effects of priming particles on the weak reset discharge characteristics in the dual-slope ramp reset waveform are examined. The first voltage-slope ramp waveform plays a role in producing the priming particles, which has a significant influence on the reset discharge during the second voltage-slope period. That is, the priming particles produced by the first voltage-slope ramp waveform contribute to facilitating and lowering the IR emission intensity during the second voltage-slope period.

목차 (Table of Contents)

• 제 1 장 서론 1
• 제 2 장 이론적 배경 3
• 2.1 AC-PDP 구동 방법 3
• 2.2 초기화 기간 구동 방법 4
• 2.3 셀의 정특성 13
• 제 3 장 실험방법 15
• 3.1 실험장치 및 측정방법 15
• 3.2 인가파형 17
• 제 4 장 실험결과 23
• 4.1 X-바이어스 전압 인가파형에 따른 방전특성 23
• 4.2 이중-기울기 초기화 인가파형 변화에 따른 방전특성 36
• 제 5 장 결론 48
• 참고문헌 49
• 영문초록 51