Gas discharge lamp with reduced electromagnetic interference radiation
First Claim
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1. A gas discharge lamp with an inner discharge vessel including an inner space, said inner discharge vessel surrounded by an outer bulb, wherein the outer bulb includes an electrically conductive first conductor surface arranged on an outer wall of the outer bulb of said discharge lamp and a second conductor surface embedded in the wall of the outer bulb, wherein said first conductor surface and said second conductor surface are mutually insulated and substantially enclose said discharge vessel in the form of a screen;
- a first electrode projecting into the discharge vessel,a second electrode projecting into the discharge vessel,said electrically conductive first conductor surface being conductively connected to the first electrode at an end region of the first electrode outside of the discharge vessel and at least partly surrounding the discharge vessel, andsaid electrically conductive second conductor surface being conductively connected to the second electrode at an end region of the second electrode outside of the discharge vessel and surrounding the discharge vessel,the first and second conductor surfaces being positioned outside of the discharge vessel thus forming a decoupling capacitor which short-circuits the first electrode and second electrode for high-frequency currents.
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Abstract
A gas discharge lamp (1) with a discharge vessel (2), a first electrode (3) projecting into the discharge vessel (2), and a second electrode (4) projecting into the discharge vessel (2) is described. The first electrode (3) is connected to an electrically conductive first conductor surface (5) surrounding the discharge vessel (2). The second electrode (4) is connected to an electrically conductive second conductor surface (6) surrounding the discharge vessel (2) and arranged such that it overlaps the first conductor surface (5) so as to form a capacitance (C).
14 Citations
20 Claims
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1. A gas discharge lamp with an inner discharge vessel including an inner space, said inner discharge vessel surrounded by an outer bulb, wherein the outer bulb includes an electrically conductive first conductor surface arranged on an outer wall of the outer bulb of said discharge lamp and a second conductor surface embedded in the wall of the outer bulb, wherein said first conductor surface and said second conductor surface are mutually insulated and substantially enclose said discharge vessel in the form of a screen;
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a first electrode projecting into the discharge vessel, a second electrode projecting into the discharge vessel, said electrically conductive first conductor surface being conductively connected to the first electrode at an end region of the first electrode outside of the discharge vessel and at least partly surrounding the discharge vessel, and said electrically conductive second conductor surface being conductively connected to the second electrode at an end region of the second electrode outside of the discharge vessel and surrounding the discharge vessel, the first and second conductor surfaces being positioned outside of the discharge vessel thus forming a decoupling capacitor which short-circuits the first electrode and second electrode for high-frequency currents. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A headlight or luminaire comprising:
- a gas discharge lamp with an inner discharge vessel including an inner space, said inner discharge vessel surrounded by an outer bulb, wherein the outer bulb includes an electrically conductive first conductor surface arranged on an outer wall of the outer bulb of said discharge lamp and a second conductor surface embedded in the wall of the outer bulb, wherein said first conductor surface and said second conductor surface are mutually insulated and substantially enclose said discharge vessel in the form of a screen;
a first electrode projecting into the discharge vessel, a second electrode projecting into the discharge vessel, said electrically conductive first conductor surface conductively connected to the first electrode at an end region of the first electrode outside of the discharge vessel and at least partly surrounding the discharge vessel, and said electrically conductive second conductor surface being conductively connected to the second electrode at an end region of the second electrode outside of the discharge vessel and surrounding the discharge vessel, the first and second conductor surfaces being positioned outside of the discharge vessel thus forming a decoupling capacitor which short-circuits the first electrode and second electrode for high-frequency currents. - View Dependent Claims (10)
- a gas discharge lamp with an inner discharge vessel including an inner space, said inner discharge vessel surrounded by an outer bulb, wherein the outer bulb includes an electrically conductive first conductor surface arranged on an outer wall of the outer bulb of said discharge lamp and a second conductor surface embedded in the wall of the outer bulb, wherein said first conductor surface and said second conductor surface are mutually insulated and substantially enclose said discharge vessel in the form of a screen;
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11. A gas discharge lamp with an inner discharge vessel including an inner space, said inner discharge vessel surrounded by an outer bulb, wherein the outer bulb includes an electrically conductive first conductor surface embedded in a wall of the outer bulb of said discharge lamp and a second conductor surface embedded in the wall of the outer bulb, wherein said first and second surfaces are separated by a small distance and electrically insulated, wherein said first conductor surface and said second conductor surface are mutually insulated and substantially enclose said discharge vessel in the form of a screen;
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a first electrode projecting into the discharge vessel, a second electrode projecting into the discharge vessel, said electrically conductive first conductor surface being conductively connected to the first electrode at an end region of the first electrode outside of the discharge vessel and at least partly surrounding the discharge vessel, and said electrically conductive second conductor surface being conductively connected to the second electrode at an end region of the second electrode outside of the discharge vessel and surrounding the discharge vessel, the first and second conductor surfaces being positioned outside of the discharge vessel thus forming a decoupling capacitor which short-circuits the first electrode and second electrode for high-frequency currents. - View Dependent Claims (12, 13, 14, 15)
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16. A gas discharge lamp with an inner discharge vessel including an inner space, said inner discharge vessel surrounded by an outer bulb, wherein the outer bulb includes an electrically conductive first conductor surface and a second conductor surface, wherein said first and second surfaces are separated by a small distance and electrically insulated, wherein said first conductor surface and said second conductor surface are mutually insulated and substantially enclose said discharge vessel in the form of a screen;
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a first electrode projecting into the discharge vessel, a second electrode projecting into the discharge vessel, said electrically conductive first conductor surface being conductively connected to the first electrode at an end region of the first electrode outside of the discharge vessel and at least partly surrounding the discharge vessel, and said electrically conductive second conductor surface being conductively connected to the second electrode at an end region of the second electrode outside of the discharge vessel and surrounding the discharge vessel, the first and second conductor surfaces being positioned outside of the discharge vessel thus forming a decoupling capacitor which short-circuits the first electrode and second electrode for high-frequency currents. - View Dependent Claims (17, 18, 19, 20)
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Specification
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Current AssigneeKoninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
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Original AssigneeKoninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
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InventorsLesch, Norbert, Traa, Willebrordus Gerardus
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Primary Examiner(s)Williams; Joseph L
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Assistant Examiner(s)Farokhrooz; Fatima N
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Application NumberUS10/549,237Publication NumberTime in Patent Office1,933 DaysField of Search313/317, 31331801-3183, 313/568, 313/569, 313/594, 313/574, 313/622, 313/282, 313/283, 313/595, 313/607, 313/234, 313/489, 313/580, 313/573, 313/517, 313/643, 313/637, 313/635, 313/634, 313/631, 313/632, 315/300, 315/306, 315/291, 362/487, 362/459, 362/475, 362/509, 445/26, 445/72, 445/24US Class Current313/635CPC Class CodesH01J 5/02 Vessels; Containers; Shield...H01J 61/35 provided with coatings on t...H01J 61/56 One or more circuit element...H01J 7/44 One or more circuit element...
