公开(公告)号：EP0988640A1

公开(公告)日：2000-03-29

申请号：EP98928781.8

申请日：1998-06-10

Applicant: Lightlab AB

Inventor： KAFTANOV, Vitaly Sergeevich ,  SUVOROV, Alexander Leonidovich ,  SHESHIN, Evgenij Pavlovich ,  OLSFORS, Jan

IPC: H01J1/30

CPC classification number: H01J63/04 ,  H01J1/304

Abstract: A field emission cathode (40) and a light source (10) including a field emission cathode (40). The field emission cathode (40) includes a base body, and field emitting bodies in the form of fibres (42), attached to the base body. The fibres (42) have field emitting surfaces at their free ends, and the base body is a longitudinally extending core (41) formed by at least two wires (43) between which the fibres (42) are secured. The fibres (42) are distributed along at least a part of the length of the core (41) and extend radially outwards from the core (41). The light source comprises an evacuated container having walls, at least a portion of which consists of an outer glass layer (23, 23') which on at least a major part thereof is coated on the inside with a layer of phosphor (24, 24') forming a luminescent layer, and a conductive layer (25, 25') forming an anode. The layer of phosphor (24, 24') is excited to luminescence by electron bombardment from a field emission cathode (40, 40') located in the interior of the container. A modulator electrode (30, 30') is arranged between the cathode (40, 40') and the anode (25, 25') for creating the electrical field necessary for the emission of electrons. The field emission cathode (40, 40') includes a base body, and field emitting bodies in the form of fibres (42, 42'), attached to the base body, and the fibres (42, 42') have field emitting surfaces at their free ends.

公开(公告)号：EP0988640B1

公开(公告)日：2003-02-12

申请号：EP98928781.8

申请日：1998-06-10

Applicant: Lightlab AB

Inventor： KAFTANOV, Vitaly Sergeevich ,  SUVOROV, Alexander Leonidovich ,  SHESHIN, Evgenij Pavlovich ,  OLSFORS, Jan

IPC: H01J1/30

CPC classification number: H01J63/04 ,  H01J1/304

Abstract: A field emission cathode (40) and a light source (10) including a field emission cathode (40). The field emission cathode (40) includes a base body, and field emitting bodies in the form of fibres (42), attached to the base body. The fibres (42) have field emitting surfaces at their free ends, and the base body is a longitudinally extending core (41) formed by at least two wires (43) between which the fibres (42) are secured. The fibres (42) are distributed along at least a part of the length of the core (41) and extend radially outwards from the core (41). The light source comprises an evacuated container having walls, at least a portion of which consists of an outer glass layer (23, 23') which on at least a major part thereof is coated on the inside with a layer of phosphor (24, 24') forming a luminescent layer, and a conductive layer (25, 25') forming an anode. The layer of phosphor (24, 24') is excited to luminescence by electron bombardment from a field emission cathode (40, 40') located in the interior of the container. A modulator electrode (30, 30') is arranged between the cathode (40, 40') and the anode (25, 25') for creating the electrical field necessary for the emission of electrons. The field emission cathode (40, 40') includes a base body, and field emitting bodies in the form of fibres (42, 42'), attached to the base body, and the fibres (42, 42') have field emitting surfaces at their free ends.

公开(公告)号：EP0988641A1

公开(公告)日：2000-03-29

申请号：EP98929977.1

申请日：1998-06-10

Applicant: Lightlab AB

Inventor： KAFTANOV, Vitaly Sergeevich ,  SUVOROV, Alexander Leonidovich ,  SHESHIN, Evgenij Pavlovich ,  OLSFORS, Jan

IPC: H01J1/30

CPC classification number: H01J63/04 ,  H01J1/304 ,  H01J61/0672 ,  H01J63/06

Abstract: The light source comprises an evacuated container having walls, at least a portion of which consists of an outer glass layer (23, 23') which on at least a major part thereof is coated on the inside with a layer of phosphor (24, 24') forming a luminescent layer and a conductive layer (25, 25') forming an anode. The layer of phosphor (24, 24') is excited to luminescence by electron bombardment from a field emission cathode (40, 40') located in the interior of the container. A modulator electrode is arranged between the cathode (40, 40') and the anode (25, 25') for creating an electrical field necessary for the emission of electrons. The field emission cathode (40, 40') includes a longitudinally extending core (41, 41') having a central axis, and field emitting bodies (42, 42') extending from the core (41, 41'). The field emitting bodies (42, 42') are elongate and are distributed along at least a part of the length of the core (41, 41'). The field emitting bodies (42, 42') extend radially outwards from the core (41, 41') and have free ends provided with field emitting surfaces.