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US 8,284,154 B2Granted
Discharge tube, ferrule, lighting device, display device and television receiver
AssigneesSharp Kabushiki Kaisha, Japan Aviation Electronics Industry, Limited
InventorsYoshiki Takata, Kenichi Iwamoto, Takaaki Kudo
Life of this patent
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Abstract
In a discharge tube, a conductive ferrule is provided on an end portion of a glass tube. The ferrule includes a body that is to be mounted to the outer circumference of the glass tube and has a contact portion to be electrically conductively fixed to a relay connector (or a bearing device). Further included is a conductive portion that extends from the body so as to have elastic contact with an outer lead. The outer lead will not be under load due to the weight of the discharge tube, but the conductive portion solely has elastic contact therewith. Thus, stress concentration on the outer lead can be prevented.
Claims15
A discharge tube comprising:
- a glass tube;
- an outer lead arranged to project from an end portion of the glass tube and arranged to receive power supplied from a power source;
- and
- a ferrule including a body mounted to an outer circumference of the glass tube and a conductive portion extending from the body;
- wherein
- the body is electrically connected to the power source;
- the conductive portion is electrically connected to the body;
- the ferrule is a single-piece component made of a metal plate;
- the conductive portion includes:
- an elongated portion that includes a proximal end that is connected to the body and a distal end that is not connected to the body;
- and
- a connecting portion that extends from the distal end of the elongated portion;
- and
- the connecting portion is electrically connected with the outer lead.
11 more elements
A lighting device comprising:
- a power source;
- a discharge tube;
- and
- a chassis defining a mounting base for the power source and the discharge tube;
- wherein
- the discharge tube includes:
- a glass tube;
- an outer lead arranged to project from an end portion of the glass tube and arranged to receive power supply from the power source;
- and
- a ferrule including a body mounted to an outer circumference of the glass tube and a conductive portion extending from the body, the body being electrically connected to the power source, the conductive portion being electrically connected to the body, wherein the ferrule is a single-piece component prepared by processing a metal plate;
- the conductive portion includes:
- an elongated portion that includes a proximal end that is connected to the body and a distal end that is not connected to the body;
- and
- a connecting portion that extends from the distal end of the elongated portion;
- and
- the connecting portion is electrically connected with the outer lead.
13 more elements
A display device comprising:
- a lighting device that includes:
- a power source;
- a discharge tube;
- and
- a chassis defining a mounting base for the power source and the discharge tube;
- and
- a display panel arranged on a front side of the lighting device;
- wherein
- the discharge tube includes:
- a glass tube;
- an outer lead arranged to project from an end portion of the glass tube and arranged to receive power supply from the power source;
- and
- a ferrule including a body mounted to an outer circumference of the glass tube and a conductive portion extending from the body, the body being electrically connected to the power source, the conductive portion being electrically connected to the body, wherein the ferrule is a single-piece component prepared by processing a metal plate;
- the conductive portion includes:
- an elongated portion that includes a proximal end that is connected to the body and a distal end that is not connected to the body;
- and
- a connecting portion that extends from the distal end of the elongated portion;
- and
- the connecting portion is electrically connected with the outer lead.
16 more elements
A television receiver comprising:
- a lighting device for a display device that includes:
- a power source;
- a discharge tube;
- and
- a chassis defining a mounting base for the power source and the discharge tube;
- and
- a display panel arranged on a front side of the lighting device;
- wherein
- the discharge tube includes:
- a glass tube;
- an outer lead arranged to project from an end portion of the glass tube and arranged to receive power supply from the power source;
- and
- a ferrule including a body mounted to an outer circumference of the glass tube and a conductive portion extending from the body, the body being electrically connected to the power source, the conductive portion being electrically connected to the body, wherein the ferrule is a single-piece component prepared by processing a metal plate;
- the conductive portion includes:
- an elongated portion that includes a proximal end that is connected to the body and a distal end that is not connected to the body;
- and
- a connecting portion that extends from the distal end of the elongated portion;
- and
- the connecting portion is electrically connected with the outer lead.
16 more elements
Dependencies are inferred from the claim text.