Fluorescent lamp, fluorescent lamp unit, liquid crystal display device, and method of emitting light
First Claim
1. A fluorescent lamp comprising:
- a first substrate;
a second substrate which is arranged so as to face said first substrate;
a discharge gas which is sealed between said first substrate and said second substrate; and
a plurality of discharge electrodes having discharge projections which are arranged on said first substrate and/or said second substrate, said projections and said discharge electrodes being substantially coplaner and said projections extending from said discharge electrodes in a direction different from a longitudinal axis of said discharge electrodes, wherein said fluorescent lamp emits light by causing electric discharge in different areas alternated in accordance with said discharge projections and voltages applied to said plurality of discharge electrodes.
8 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display device has a fluorescent lamp and a driving circuit as a back light. A closed container, a discharge gas sealed in the closed container, first discharge electrodes, and second discharge electrodes are included in the fluorescent lamp. The driving circuit repeats a first step of causing electric discharge in first discharge areas by applying a voltage having a negative polarity to the first discharge electrodes and a voltage having a positive polarity to the second discharge electrodes, and a second step of causing electric discharge in second discharge areas which are different from the first discharge areas by applying a voltage having a positive polarity to the first discharge electrodes and a voltage having a negative polarity to the second discharge electrodes.
34 Citations
31 Claims
-
1. A fluorescent lamp comprising:
-
a first substrate;
a second substrate which is arranged so as to face said first substrate;
a discharge gas which is sealed between said first substrate and said second substrate; and
a plurality of discharge electrodes having discharge projections which are arranged on said first substrate and/or said second substrate, said projections and said discharge electrodes being substantially coplaner and said projections extending from said discharge electrodes in a direction different from a longitudinal axis of said discharge electrodes, wherein said fluorescent lamp emits light by causing electric discharge in different areas alternated in accordance with said discharge projections and voltages applied to said plurality of discharge electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A method of emitting light from a lamp (back light) in which a discharge gas is sealed, and first and second discharge electrodes are formed, said method comprising:
-
causing electric discharge in first discharge areas between the first and second discharge electrodes in accordance with discharge projections of said first discharge electrodes by applying a voltage having a negative polarity to the first discharge electrodes and a voltage having a positive polarity to the second discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light through a phosphor, said projections and said discharge electrodes being substantially coplaner and said projections extending from said discharge electrodes in a direction different from a longitudinal axis of said discharge electrodes;
causing electric discharge in second discharge areas which are different from the first discharge areas at least partially and which are between the first and second discharge electrodes in accordance with discharge projections of said second discharge electrodes by applying a voltage having a positive polarity to the first discharge electrodes and a voltage having a negative polarity to the second discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light through the phosphor; and
controlling said causing electric discharge in the first discharge areas and said causing electric discharge in the second discharge areas to be repeated. - View Dependent Claims (22, 23, 24)
-
-
25. A method of emitting light from a lamp (back light) in which a discharge gas is sealed, and first discharge electrodes, second discharge electrodes, and third discharge electrodes are formed, said method comprising:
-
causing electric discharge in first discharge areas between the first and second discharge electrodes in accordance with discharge projections of said second discharge electrodes by applying a drive voltage of a positive potential to one of the first and second discharge electrodes and a drive voltage of a negative potential to the other of the first and second discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light through a phosphor, said projections and said discharge electrodes being substantially coplaner and said projections extending from said discharge electrodes in a direction different from a longitudinal axis of said discharge electrodes;
causing electric discharge in second discharge areas which are different from the first discharge areas at least partially and which are between the first and third discharge electrodes in accordance with discharge projections of said third discharge electrodes by applying a drive voltage of a positive potential to one of the first and third discharge electrodes and a drive voltage of a negative potential to the other of the first and third discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light via the phosphor; and
controlling said causing electric discharge in the first discharge areas and said causing electric discharge in the second discharge areas to be repeated. - View Dependent Claims (26, 27, 28)
-
-
29. A fluorescent lamp comprising:
-
a first substrate;
a second substrate which is arranged so as to face said first substrate;
a discharge gas which is sealed between said first substrate and said second substrate; and
a plurality of discharge electrodes having discharge projections which are arranged on said first substrate and/or said second substrate, wherein said fluorescent lamp emits light by causing electric discharge in different areas alternated in accordance with said discharge projections and voltages applied to said plurality of discharge electrodes and wherein said discharge projections have a shape selected from at least one of;
a semicircular shape, a semi-circumferential shape, a circumferential shape, a double semi-circumferential shape, and an integrated shape of one or more linear projections.
-
-
30. A method of emitting light from a lamp (back light) in which a discharge gas is sealed, and first and second discharge electrodes are formed, said method comprising:
-
causing electric discharge in first discharge areas between the first and second discharge electrodes in accordance with discharge projections of said first discharge electrodes by applying a voltage having a negative polarity to the first discharge electrodes and a voltage having a positive polarity to the second discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light through a phosphor;
causing electric discharge in second discharge areas which are different from the first discharge areas at least partially and which are between the first and second discharge electrodes in accordance with discharge projections of said second discharge electrodes by applying a voltage having a positive polarity to the first discharge electrodes and a voltage having a negative polarity to the second discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light through the phosphor; and
controlling said causing electric discharge in the first discharge areas and said causing electric discharge in the second discharge areas to be repeated, wherein said discharge projections have a shape selected from at least one of;
a semicircular shape, a semi-circumferential shape, a circumferential shape, a double semi-circumferential shape, and an integrated shape of one or more linear projections.
-
-
31. A method of emitting light from a lamp (back light) in which a discharge gas is sealed, and first discharge electrodes, second discharge electrodes, and third discharge electrodes are formed, said method comprising:
-
causing electric discharge in first discharge areas between the first and second discharge electrodes in accordance with discharge projections of said second discharge electrodes by applying a drive voltage of a positivepotential to one of the first and second discharge electrodes and a drive voltage of a negative potential to the other of the first and second discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light through a phosphor;
causing electric discharge in second discharge areas which are different from the first discharge areas at least partially and which are between the first and third discharge electrodes in accordance with discharge projections of said third discharge electrodes by applying a drive voltage of a positive potential to one of the first and third discharge electrodes and a drive voltage of a negative potential to the other of the first and third discharge electrodes, and converting ultraviolet rays caused by the electric discharge into visible light via the phosphor; and
controlling said causing electric discharge in the first discharge areas and said causing electric discharge in the second discharge areas to be repeated, wherein said discharge projections have a shape selected from at least one of;
a semicircular shape, a semi-circumferential shape, a circumferential shape, a double semi-circumferential shape, and an integrated shape of one or more linear projections.
-
Specification