JPH0443963Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) This invention relates to a mounting structure for a compact fluorescent lamp suitable for use as a pixel in a display panel device, for example.

(Prior art) These applicants filed an earlier patent application (Japanese Patent Application No. 1983-
No. 141409), a small fluorescent lamp of the hot cathode type using low pressure gas, with a single-ended lamp having a negative electrode and a positive electrode facing each other at a short distance only at one end of the bulb, the interior of which is coated with fluorescent paint. We proposed a type of compact fluorescent lamp.

This fluorescent lamp is called a single-ended type because the discharge electrodes are provided only at one end of the bulb, facing each other at a short interval, and because the discharge interval is small, it can be lit with a low voltage.

In addition, it can be used as a compact fluorescent lamp with a small bulb diameter and length, and has low power consumption and a long life, so it can be used as a light source element (pixel) to create a full-color, large-sized fluorescent lamp with low power consumption. Display panel devices became possible.

In this case, it was especially necessary to stabilize the discharge of each fluorescent lamp so that light was always emitted from the center of the lamp in order to prevent display unevenness. Since the mount was constructed by placing the positive and negative electrodes in parallel and facing each other, the electrodes were not exactly parallel to each other during assembly, resulting in discharge intervals and discharge positions shifting in the axial direction of each electrode and becoming unstable. This caused display unevenness.

As a way to avoid this, it has been considered to strictly control quality and arrange the negative and positive electrodes so that they are correctly parallel to each other, but this has resulted in the problem of poor yield.

(Technical Issues) The purpose of this invention is to create a compact device that can stabilize the discharge position and discharge interval using simple and inexpensive means, and that also does not become an obstacle during automatic manufacturing. It is intended to provide a mounting structure for fluorescent lamps.

(Technical means) In order to achieve the above-mentioned object, this invention is a hot cathode type fluorescent lamp that uses low pressure gas.
Three long and short electrode posts are set up from one end of the bulb, the inside of which is coated with fluorescent paint, so that they form the vertices of a triangle, and between a pair of these electrode posts of the same length, an electron emitting source is placed. A coiled filament-shaped negative electrode coated with a substance is stretched, and the end of a rod-shaped positive electrode is attached perpendicularly to the upper end of the remaining electrode support, and this positive electrode is connected between the negative electrode and the negative electrode. A mount for a small fluorescent lamp is constructed by arranging the fluorescent lamps in a substantially cross-shape orthogonal to the center thereof with a small interval at which discharge occurs at a low voltage.

(Function) By configuring as described above, the position where the negative electrode and the positive electrode are orthogonal to each other becomes the smallest in the interval, and the interval is constant, and this position is inevitably determined as the discharge position. . Furthermore, with this configuration, the positive electrode can be easily connected to the electrode support, so automatic assembly is easy.

(Example) According to the drawings, in Figures 1 and 2, 3
Socket 1 with protruding book terminals 1a, 1a, 1b
A valve 4 with an exhaust pipe 3, a small amount of rare gas such as mercury and argon sealed inside, and a fluorescent paint coated on the inside is installed upright. There are three long and short electrode supports 5.
a, 5a, and 5b are erected to form the vertices of a triangle when viewed from a plane. These electrode supports 5a, 5
Lead wires 5c, 5c, 5d are connected to a, 5b, and although not shown, they hermetically pass through the inside of the stem 2 and are led out to the outside of the valve 4, and are connected to the terminals 1a, 1.
It is connected to a and 1b. A pair of electrode columns 5a, 5a have the same length and reach the upper part of the inside of the bulb 4, and each upper end is provided with a coiled filament-shaped negative electrode coated with an electron radioactive material. 6 is stretched horizontally.
Then, the remaining electrode support 5b is replaced by the previous electrode support 5.
a, 5a, and one end of a rod-shaped positive electrode 7 is attached to the upper end thereof in a perpendicular direction, and extends in a direction perpendicular to the cross shape with the negative electrode 6. A mount 8 is formed by facing each other with a small interval in which discharge occurs due to voltage. Note that the ring-shaped thing attached to the electrode support 5b is a getter 9.

In addition, the discharge interval at the intersection between each electrode depends on the diameter of the bulb in the discharge section, and if the diameter is 7, then 2
mm to 2.5 mm, and those with a diameter of 10 are 2.5 mm to 3
mm.

Therefore, as shown in Figure 3, connect terminals 1a and 1b to the positive side of a DC power supply (approximately 24V),
When the other terminal 1a is connected to the negative side and the switch 10 is turned on, the negative electrode 6 becomes red hot, and thermionic electrons are emitted from one end toward the positive electrode 7, and these thermionic electrons evaporate. When the mercury vapor collides with the mercury vapor, ultraviolet light is generated, and this ultraviolet light collides with the fluorescent material to generate visible light, which is emitted to the outside. Once the negative electrode 6 is heated, its effect remains even if the voltage is subsequently lowered to about 15V. At this time, in the device according to the present application, since the point where the distance between the negative electrode 6 and the positive electrode 7 is the smallest is the position where the two electrodes intersect, the discharge interval becomes constant, and the brightness becomes constant. Since the discharge position is at this orthogonal position and the light is emitted from approximately the center of the bulb 4 at this orthogonal position, the bright spots are constant and display unevenness will not occur if a large number of them are lined up. can be prevented as much as possible.

Furthermore, since the discharge position can be stabilized at orthogonal positions between the positive and negative electrodes, the yield rate is good, and the structure is simple, so even when automatically manufacturing it, there are no technical difficulties. It can be easily manufactured without encountering it.

It should be noted that the visible light can be of various colors depending on the type of fluorescent material coated inside the bulb 4, and the shape and structure of the socket 1 are not limited to those of the embodiment.

(Effects) As explained in detail above, this invention has a simple configuration and can set the discharge interval and discharge position to a constant point, so the brightness and bright spot can be constant, and these can be used in large display panel devices. In addition to being able to prevent display unevenness as much as possible when arranging a large number of display devices, it is also possible to easily and automatically manufacture the display devices.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with Fig. 1 being a side sectional view for explaining this invention, Fig. 2 being a perspective view of the mount part, and Fig. 3 being a diagram for lighting the fluorescent lamp according to the present application. It is a circuit diagram. 1... Socket, 2... Stem, 3... Exhaust pipe, 4... Valve, 5a, 5b... Electrode support, 6
...Cathode electrode, 7...Positive electrode, 8...Mount.

Claims (1)

[Scope of utility model registration request] In a hot cathode type fluorescent lamp that uses low-pressure gas, the bulb is coated with fluorescent paint on the inside, and from one end of the bulb, the long and short sections are arranged so that they form the vertices of a triangle.
A coiled filament-shaped negative electrode coated with an electron radioactive substance is stretched between a pair of electrode supports of the same length,
Attach the end of a rod-shaped positive electrode perpendicularly to the upper end of the remaining electrode column, and connect the positive electrode to the negative electrode at approximately the center with a small gap between it and the negative electrode where discharge occurs at low voltage. A mounting structure for a compact fluorescent lamp, characterized by being arranged orthogonally in a substantially cross shape.