External electrode noble gas lamp with serrated/scalloped lengthwise electrodes

• US 6,051,926 A
• Filed: 04/03/1998
• Issued: 04/18/2000
• Est. Priority Date: 04/07/1997
• Status: Expired due to Term

• Current Assignee: NEC Corporation, Ushio Denki Kabushiki Kaisha
• Original Assignee: NEC Corporation
• Inventors: Tamura, Satoshi
• Primary Examiner(s): Patel, Nimeshkumar D.
• Assistant Examiner(s): Gerike, Matthew J.
• Application Number:
  US09/054,587
• Time in Patent Office: 746 Days
• Field of Search: 313/567, 313/607, 313/488, 313/493
• US Class Current: 313/567
• CPC Class Codes: H01J 61/0672 characterised by the construction of the electrode
• CPC Class Codes: H01J 61/16 having helium, argon, neon, krypton, or xenon as the principle constituent
• CPC Class Codes: H01J 65/046 the field being produced by using capacitive means around the vessel

Abstract

A noble gas discharge lamp of the present invention comprises an outer enclosure comprising a light emitting layer formed therein, and a pair of outer electrodes having tape shapes comprising a metal, which are adhered to the entire length of the outside of the outer enclosure so as to separate one outer electrode and the other outer electrode at a certain distance. The electrodes form a first opening portion and a second opening portion; wherein the outer enclosure is filled with at least one kind of noble gas under the confining pressure is in a range of 83 to 200 Torr. There is at least one nonlinear portion formed at at least one side portion of the outer electrodes.

Claims

1. A noble gas discharge lamp comprising:

an outer enclosure comprising a light emitting layer formed therein, and a pair of outer electrodes having tape shapes comprising a metal, which are adhered to the entire length of the outside of the outer enclosure so as to separate one outer electrode and the other outer electrode at a certain distance, and to form a first opening portion and a second opening portion;

wherein the outer enclosure is filled with at least one kind of noble gas under the confining pressure in a range of 83 to 200 Torr, and at least one nonlinear portion is formed at at least one side portion of the outer electrodes.

2. A noble gas discharge lamp according to claim 1, wherein light emitted from the light emitting layer is mainly emitted from the first opening portion, and at least one nonlinear portion is formed at at least one side portion of a pair of the outer electrodes forming the second opening portion.

3. A noble gas discharge lamp according to claim 2, wherein an insulating material is coated on the outside of the outer enclosure so as to cover the outer electrodes.

4. A noble gas discharge lamp according to claim 3, wherein the insulating material is at least one material selected from the group consisting of a protective tube comprising a thermal shrinking resin and a light transmitting sheet.

5. A noble gas discharge lamp according to claim 1, wherein the outer enclosure is in a straight tube shape, and the noble gas discharge lamp further comprises an outer laminate

having a light transmitting sheet, outer electrodes, and an adhesive layer,

the light transmitting sheet having the same length as the outer enclosure, the outer electrodes having tape shapes comprised of a metal positioned on one surface of the light transmitting sheet so as to separate one outer electrode and the other outer electrode,

the adhesive layer being disposed on the surface of the light transmitting sheet in which the outer electrodes are positioned, and

the outer electrodes and the light transmitting layer being formed on the outside of the outer enclosure in sequence.

6. A noble gas discharge lamp according to claim 1, wherein the nonlinear portion is formed over the entire length of the outer electrode.

7. A noble gas discharge lamp according to claim 6, wherein the nonlinear portion is formed in a series of a repeated shape, the shape being at least one of a triangle, a polygon, and a wave shape.

8. A noble gas discharge lamp according to claim 7, wherein the polygon is a trapezoid.

9. A noble gas discharge lamp according to claim 7, wherein the wave shape is in a series of repeated semicircles.

10. A noble gas discharge lamp according to claim 1, wherein an aperture is formed in the inside of the outer enclosure at a position corresponding to the first opening portion, in which the light emitting layer is not formed.

11. A noble gas discharge lamp according to claim 1, wherein the outer enclosure is filled with xenon gas.