JPH03129658A - Fluorescent lamp for color image display device - Google Patents

Abstract

PURPOSE:To reduce power consumption so as to save power by providing a getter supporting body independently of an inner lead-in wire, and fixing a mercury getter to the getter supporting body. CONSTITUTION:A getter supporting body 17 is supported to a slum 11 independently of an inner lead in wire 10 and a mercury getter 16 is fixed to the getter supporting body 17 by means of welding. Current flow through an electrode filament 9 is therefore able to heat the electrode filament 9 without loss; which should reduce power consumption so as to save power.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluorescent lamp used as a light emitting element of a color image display device.

2. Description of the Related Art As a light emitting element having a plurality of picture elements used in a large color image display device, the applicant previously proposed a fluorescent lamp as shown in FIG. In this figure, the mercury getter 16 is welded to the internal lead-in wire 10. discharge space 6
a, 6b, 6c represent one picture element, discharge spaces 7a, 7b,
7c each forms another picture element.

Problems to be Solved by the Invention In the configuration shown in FIG. 3, since the mercury getter 16 is fixed to the internal introduction 45110 by welding,
This still consumes power.

When such fluorescent lamps are installed in a large color image display device, approximately 10,000 to 50,000 lamps are usually incorporated into one device, so the power consumption is, for example, 20,000 yen per display area.
In the case of 7+#, the power consumption was as large as 4.3 kW/nf (video average), and therefore, the problem was how to reduce the power consumption of the fluorescent lamp.

The present invention has been made to solve these problems and provides a fluorescent lamp for large color image display devices with reduced power consumption.

Means for Solving the Problem In order to solve this problem, the fluorescent lamp of the present invention includes an airtight container body made of ceramic having a translucent front plate, and an electrode filament integrated into the bottom surface of the airtight container body. A plurality of discharge spaces are formed by providing a lattice-like partition wall in the airtight container main body, and each discharge space and the electrode filament storage part are formed in the center of the bottom of the airtight container. A hole for communication with the space is provided independently, an electrode filament is arranged in the electrode filament storage part via an internal lead-in wire, and a getter support is provided separately from the internal lead-in wire, A mercury getter is fixed thereto, and an electrode is provided at the end of each discharge space far from the hole to form a plurality of discharge paths between the electrode filament and each electrode, and the airtight container body A plurality of picture elements are formed by applying phosphor to the portions that will become discharge paths.

Function The fluorescent lamp of the present invention has a getter support separate from the internal lead-in wire that supports the electrode filament, and the mercury getter is fixed to this, so that the current flowing through the electrode filament can be transferred to the electrode without loss. The filament can be heated. Therefore, when such a lamp is used, for example, as a light emitting element in a large color image display device, it is possible to save about 2% in power compared to a conventional lamp in which a mercury getter is welded to the internal lead-in wire of the electrode filament.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a fluorescent lamp for a color image display device, which is an embodiment of the present invention, and FIG. 2 is a front view of the same.

As shown in FIG. 1, the fluorescent lamp according to the embodiment of the present invention includes a rectangular airtight container body 1 made of a ceramic container, a front plate 2 made of a glass plate sealed to the front surface with low melting point glass, and an airtight container body 1 made of a ceramic container. Hole 3 drilled in the rear of the container body 1
An airtight container is constituted by an electrode filament storage section 4 made of a glass tube whose one end is sealed with low melting point glass and whose other end is sealed. Inside the airtight container main body 1, partition walls 5 are integrally formed in a lattice shape, and six discharge spaces 6a, 6b, 6. c, 7a, 7b, and 7c are formed. At the center of the bottom of the airtight container body 1, that is, at one end of each discharge space, there is a small hole 8 as shown in FIG.
are provided independently, and each discharge space communicates with the space of the electrode filament storage section 4 through these holes.

In the vicinity of these holes, a coiled electrode filament 9 provided in the electrode filament housing 4 is supported by two internal lead-in wires 10 and arranged. The two internal introduction lines 1410 are supported by the stem 11, and the external introduction lines 13 are connected to these, respectively. Getter support 17 is internally introduced 1! ! The mercury getter 16 is supported by the stem 11 separately from the getter support 110, and the mercury getter 16 is fixed to this getter support 17 by welding. Note that 12 indicates an exhaust pipe. Furthermore, electrodes 14a are provided at the ends far from the holes 8, that is, at the other ends of these discharge spaces.

14b, 14c, 15a, 15b, 15c are provided, the electrode filament 9 and the electrode 14a, L4b.

A plurality of discharge paths are formed between 14c, 15a, 15b, and 15c. The axis of the electrode filament 9 corresponds to the discharge spaces 6a, 6b, 6c, 7a, 7b.

It is provided in a direction perpendicular to the axis of 7c.

After applying heat and evacuating the inside of this airtight container, a rare gas is sealed inside, and then a mercury getter 16 is introduced from the outside.
By heating it with a high-frequency bombardment, the necessary minimum amount of mercury is constantly supplied inside, and at the same time, residual impurity gas is adsorbed.

A rare earth phosphor that emits green (G) light is placed on the ceramic walls forming the discharge paths of the airtight container body 1, that is, the discharge spaces 6a and 7a.
A rare earth phosphor that emits red (R) light is on the ceramic wall surface forming the discharge spaces 6c and 7c, and a rare earth phosphor that emits blue light (B) is on the ceramic wall surface forming the discharge spaces 6c and 7c. It is coated.

As described above, the discharge spaces 6a, 6b, and 6c form one picture element, and the discharge spaces 7a, 7b, and 7c form another picture element, respectively.

A current is passed through the electrode filament (cathode) 9 of such a light emitting element, and each electrode (anode) 14a, 14b.

By selectively applying a voltage necessary for starting discharge to 14c, 15a, 15b, and 15c and changing the current flowing through each discharge path, the color of the emitted light could be changed. Furthermore, it was also observed that when these currents were changed over time, the brightness changed to follow the changes. Such a result means that this light emitting device can be used for displaying color images.

When a color video display device was fabricated and tested using 2560 fluorescent lamps according to this example, the brightness uniformity of the screen in the mounted state was also good, and the average power consumption for the video was 7.25kW (approximately 1.7nf). Met. This power consumption is for 2560 conventional fluorescent lamps (7.4kW
) has been reduced compared to

As described in detail, the present invention provides a getter support separately from the internal lead-in wire that supports the electrode filament and fixes the mercury getter to this, so the electrode filament can be heated efficiently. Therefore, it is possible to provide a fluorescent lamp for a color image display device that consumes less power than conventional lamps.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a fluorescent lamp for a color image display device according to an embodiment of the present invention, Fig. 2 is a front view of the same, and Fig. 3 is an exploded perspective view of a conventional fluorescent lamp for a color image display device♀1. This is a perspective view. 1... Airtight container body, 2... Front plate,
3... Hole, 4... Electrode filament storage section, 5... Partition wall, 6a, 6b, 6c, 7a,
7b, 7cm...=discharge space, 8...hole, 9.
... Electrode filament, 10 ... Internal lead-in wire, 11 ... Stem, 16 ... Mercury getter 17 ... Getter support.

Claims (1)

[Claims] An airtight container is formed from an airtight container body made of ceramic having a translucent front plate and an electrode filament accommodating portion integrated into the bottom surface of the airtight container body, and a lattice-shaped partition wall is provided in the airtight container body. A plurality of discharge spaces are formed by providing a plurality of discharge spaces, and a hole for communicating each discharge space with the space of the electrode filament storage part is provided independently in the center of the bottom of the airtight container, and An electrode filament is arranged through an internal lead-in wire, a getter support is provided separately from the internal lead-in wire, and a mercury getter is fixed to this getter support. By providing an electrode at the end and forming a plurality of discharge paths between the electrode filament and each electrode, and applying a phosphor to a portion of the airtight container body that will become each discharge path, a plurality of pictures can be formed. A fluorescent lamp characterized by forming a base.