公开(公告)号：EP0754348B1

公开(公告)日：2004-01-14

申请号：EP95936717.8

申请日：1995-11-27

申请人： Koninklijke Philips Electronics N.V.

发明人： ADRIAANSE, Jan, Peter ,  BOHLANDER, Johannes, Hendricus ,  VAN DER POEL, Willibrordus, Adrianus, Johannes,

IPC分类号： H01J29/56 ,  H01J29/50

CPC分类号： H01J29/503 ,  H01J2229/4858 ,  H01J2229/4862 ,  H01J2229/4868 ,  H01J2229/4879 ,  H01J2229/4886 ,  H01J2229/4896

摘要： A colour display tube comprises an in-line electron gun for generating three co-planar electron beams having a mean lens comprising a first and second lens electrode for producing a focusing lens field for focusing the electron beams. At least one of said lens electrodes has a correction element for tuning the astigmatism of the lens field. The correction element comprises three co-linear apertures for passing the electron beams, the outer apertures of which are funnel-shaped, the wide end of the funnel-shape being directed away from the centre aperture.

公开(公告)号：EP0783764B1

公开(公告)日：2002-01-30

申请号：EP96916270.0

申请日：1996-06-21

申请人： Koninklijke Philips Electronics N.V.

发明人： VAN DER POEL, Willibrordus, Adrianus, Johannes, ,  SPANJER, Tjerk, Gerrit

IPC分类号： H01J29/50 ,  H01J29/62

CPC分类号： H01J29/503 ,  H01J2229/4841

摘要： A display device with a DAF-gun (Dynamic Astigmatism and Focusing) in which the first focusing electrode (G3a) has at the side facing the pre-focusing part of the electron gun three elongated apertures (36, 37, 38). Hereby in operation in the vicinity of the elongated apertures an electron-optical field is generated between the pre-focusing part of the electron gun and the elongated apertures for reduction of the vertical dimension (vertical meaning transverse to the plane of the electron beams) of the beam size of the electron beams in the main lens. This reduction of the electron beam size results in an increase of the vertical dimension of the beam spot on the screen. This reduces Moiré effects.

公开(公告)号：EP0783764A1

公开(公告)日：1997-07-16

申请号：EP96916270.0

申请日：1996-06-21

申请人： PHILIPS ELECTRONICS N.V.

发明人： VAN DER POEL, Willibrordus, Adrianus, Johannes, ,  SPANJER, Tjerk, Gerrit

IPC分类号： H01J29

CPC分类号： H01J29/503 ,  H01J2229/4841

摘要： A display device with a DAF-gun (Dynamic Astigmatism and Focusing) in which the first focusing electrode (G3a) has at the side facing the pre-focusing part of the electron gun three elongated apertures (36, 37, 38). Hereby in operation in the vicinity of the elongated apertures an electron-optical field is generated between the pre-focusing part of the electron gun and the elongated apertures for reduction of the vertical dimension (vertical meaning transverse to the plane of the electron beams) of the beam size of the electron beams in the main lens. This reduction of the electron beam size results in an increase of the vertical dimension of the beam spot on the screen. This reduces Moiré effects.

公开(公告)号：EP0754348A1

公开(公告)日：1997-01-22

申请号：EP95936717.0

申请日：1995-11-27

申请人： PHILIPS ELECTRONICS N.V.

发明人： ADRIAANSE, Jan, Peter ,  BOHLANDER, Johannes, Hendricus ,  VAN DER POEL, Willibrordus, Adrianus, Johannes,

IPC分类号： H01J31 ,  H01J29

CPC分类号： H01J29/503 ,  H01J2229/4858 ,  H01J2229/4862 ,  H01J2229/4868 ,  H01J2229/4879 ,  H01J2229/4886 ,  H01J2229/4896

摘要： A colour display tube comprises an in-line electron gun for generating three co-planar electron beams having a mean lens comprising a first and second lens electrode for producing a focusing lens field for focusing the electron beams. At least one of said lens electrodes has a correction element for tuning the astigmatism of the lens field. The correction element comprises three co-linear apertures for passing the electron beams, the outer apertures of which are funnel-shaped, the wide end of the funnel-shape being directed away from the centre aperture.