公开(公告)号：EP1983501A4

公开(公告)日：2010-03-31

申请号：EP07850026

申请日：2007-12-04

Applicant: PANASONIC CORP

Inventor： OGAWA KENJI ,  HASHIMOTO SHINICHIRO ,  KAWAI SHUNSUKE

IPC: G09G3/28 ,  G09G3/20 ,  G09G3/288 ,  G09G3/292 ,  G09G3/298 ,  H04N5/66

CPC classification number: G09G3/2927 ,  G09G3/2029 ,  G09G3/298 ,  G09G2310/063 ,  G09G2310/066 ,  G09G2320/0238

公开(公告)号：EP2139020A4

公开(公告)日：2011-04-20

申请号：EP09727522

申请日：2009-03-27

Applicant: PANASONIC CORP

Inventor： MURATA MITSUHIRO ,  MIZOKAMI KANAME ,  WAKABAYASHI TOSHIHAZU ,  HASHIMOTO SHINICHIRO ,  AKAMATSU KEIJI

IPC: H01J11/00 ,  G09G3/20 ,  G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/293 ,  G09G3/294 ,  G09G3/296 ,  G09G3/298 ,  H04N5/66

CPC classification number: H01J11/40 ,  G09G3/2927 ,  G09G3/2932 ,  G09G2310/066 ,  H01J11/12

公开(公告)号：EP2077546A4

公开(公告)日：2010-11-24

申请号：EP08764094

申请日：2008-06-12

Applicant: PANASONIC CORP

Inventor： HASHIMOTO SHINICHIRO ,  OGAWA KENJI ,  KAWAI SHUNSUKE

IPC: G09G3/28 ,  G09G3/20 ,  G09G3/288 ,  G09G3/292 ,  G09G3/294 ,  G09G3/296

CPC classification number: G09G3/2927 ,  G09G3/2022 ,  G09G3/294 ,  G09G3/296 ,  G09G3/2965 ,  G09G2310/066 ,  G09G2320/0271 ,  G09G2320/066 ,  G09G2330/028

Abstract: Provided to stabilize generation of address discharge and improve gradation characteristics of display images are the following elements: a plasma display panel; a sustain pulse generating circuit; and a ramp voltage generating circuit including a first ramp voltage generating circuit, a second ramp voltage generating circuit, and a switching circuit. The first ramp voltage generating circuit generates a first ramp voltage gently increasing in an initializing period. The second ramp voltage generating circuit generates a second ramp voltage increasing with a gradient gentler than that of the rising edge of a sustain pulse and steeper than that of the first ramp voltage, at the end of each sustain period. The switching circuit stops the operation of the second ramp voltage generating circuit immediately after the second ramp voltage reaches a predetermined electric potential. In at least one sustain period of one field, no sustain pulse but the second ramp voltage is generated.