JPS58135559A - Fluorescence light source tube - Google Patents

Abstract

PURPOSE:To maintain uniform intensity by providing a slit at a position facing a line of generated light spots of a leader electrode. CONSTITUTION:When a voltage is applied to a leader electrode 8 and a filament cathode 5, electrons are extracted from the filament cathode 5. Then, when a voltage is applied to an anode 2b, extracted electrons hit the phosphor 2a on the anode 2b to illuminate, thus forming light spots 2. At this time, the slit 8a of the leader electrode 8 faces a line of light spots 2, thereby its mesh is not overlapped with the light spots. Accordingly, the intensity of the light spots 2 is not reduced and no intensity difference occurs between the light spots, thus excellent intensity can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides fluorescent light that can make the brightness of each light emitting point uniform.

In general, a fluorescent light tube with a small luminous point (e.g. 100μ
m x 80μm) in one direction (for example, pitch 14)
As provided, the facsimile light source can also be used as a copying machine light source.

1-1) and a body view (- is a plan view showing a conventional fluorescent light source tube and a partially detailed view 1).

In the figure, IFi anode substrate 2 is composed of 'fa-2b coated with phosphor 2a, for example 100JII
A light emitting point with a size of IX 80 μm, an 81 lead-out electrode formed in an 8Fi messier shape, a lattice shape, or a hexagonal shape, 4 is a lead-out terminal, and the container is #J with a predetermined interval on the lead-out electrode 3, for example 2 The installed filament cathode, 6 is a face glass, and 7 is an exhaust pipe.

Next, the light emitting operation of the fluorescent light source tube with the above configuration will be explained. 1 drawer pole 3 and filament can
When a predetermined voltage is applied to the drum, the electrons are pulled out
The filament is effectively drawn out from the filament cathode S by. Then, when a predetermined voltage is applied to the #Ih electrode via the readout terminal 4, the extracted electrons collide with the phosphor 21 on the #lI valence 2b and emit light.
Pick up the light emitting point 2. In this way, a light emitting point array is formed and can be used as a light block.

However, from No. 8, in the conventional fluorescent light source tube, the thinning electrode S is made by etching or the like, and the mesh 8aOIiL is 30 μm as shown in No. AML.

Since the pitch P is 400 voices, there may be a case where the mesh x $1 overlaps the light emitting point 2). This friend, due to the overlap between Metsy Lsa and light emitting point 2, jiff
This has disadvantages such as a decrease in the brightness and a difference in brightness between the light emitting points.

Therefore, it is an object of the present invention to provide a fluorescent light source tube that can maintain uniform brightness without any differences in brightness between the light emitting points.

In order to achieve these objectives, the gun is provided with a slit 111 at a position opposite to the light emitting point 41K of the extraction electrode, which will be explained in detail below using an example.

FIG. 3 is a partially detailed sectional view showing an example of a collection of fluorescent light source tubes according to the book @f14. In the same figure, 8 is a grid-shaped, grid-shaped,
This is an extraction electrode formed into a plate or hexagonal shape.

Therefore, the relationship between this lead-out electric current *SO slits) 8m and the light point is as shown in Figure 1IA4.
The K light emitting points 2 face each other.

Next, the light emitting operation of the fluorescent light source tube with the above configuration will be explained in detail. First, when a predetermined voltage is applied to the extraction electrode ti8si- and the filament cathode 6, electrons are effectively drawn from the filament cathode 5 by the extraction electrode 8. When a predetermined O voltage is applied to the anode 21 via the readout terminal 4, the extracted electrons collide with the phosphor 21 on the anode 21 and emit light, forming a light emitting point 2. 7 At this time, since the slit i of the extraction electrode 8 and the 20 rows of luminescent spots are opposed to each other, the slit 1 and the luminescent spots do not overlap. Therefore, the brightness of the strong light spot 2 does not decrease, and there is no difference in brightness between the light emitting points, so that a good brightness tt can be maintained.

In addition, as a dog, the width t (tx1
00μIII Elephant 2 chest reference) and Surini Tri D-31-30
0 μ job relationship! 1 o 1. In this case, the sleeve)
aO width! If you make it narrower, the viewing angle will also be smaller.In fluorescent light tubes, the lens system focuses the light.
1. It's okay to be small.

Figure 5 (a) and i) are the other iI of the extraction electrode shown in Figure 3 (Figure #14), respectively. To17 in the example. It surrounds the filament cathode 1 and can emit electrons.

In the above example, the slit of the drawer opening is 8m.
If there is a need to arrange the 20 rows of light-emitting points facing each other in the center of the light-emitting point 2, or if alignment is difficult, the light-emitting points 2 may be formed into a bar shape as shown in FIG. A desired light emitting point array can be easily formed, and workability can be improved.

In this case - as an example, the length of the rod-shaped light emitting point is 400μ
■, - is 80μ-heavy, pitch is 100μ-mechanical, and the pull-out electrode 8 has a slit) llaO width of 100μ-. Therefore, the large size of the light emitting point seen through the slit Ma is ugly. However, in this case, an 8ri plate-shaped one is used as the lead-out current 1.

As described in detail above, the fluorescent light source tube according to the present invention has the effect of making each light emitting point uniform in brightness and eliminating the difference between the light points and the brightness points.

[Brief explanation of drawings]

Figure 1 (a) and Figure 1 (b) are a flat WfJ diagram and a partially detailed sectional view of a conventional fluorescent light source tube, and Figure 2 shows the extraction electrode and light emitting point in Figure 1 (←). Floor plan showing the relationship between #! Figure 3 shows a fluorescent light source tube 0-@ Example according to the present invention-ml! A detailed diagram, Figure 4 is a plan view showing the relationship between the aWJo Hikita electrode and the light emitting point, and Figure 5 (a
) and Tuna 5WJ (b) are cross-sectional views showing other examples of the extraction electrode in Figure 3, respectively, and Figure 6 shows the O relationship with the pull-out electrode when the light emitting point in Figure 3 is formed into a rod shape. FIG. 1... Anode 1, 2... Luminous point, 21... ・
・Fluorescence integrated, 2II... ・IIl pole, 3.
... ・1 bully w pole, 4...lead out terminal,
i...Filament cathode, b...Face glass, 7...Exhaust pipe, 8...Drawer m value,
8a... -Slit. %rl-person Representative of Ise Electronics Co., Ltd. Person Masaki Yamakawa (and 1 other person) Figure 1 (b) Figure 2

Claims (1)

[Scope of Claims] α) A light-emitting point with a plurality of phosphors arranged in one direction, and facing a with a predetermined interval t above these light-emitting points.
c* extraction electrode and at least one filament cathode installed at a predetermined interval on the extraction electrode are placed in a fluorescent light a'wrtc housed in a vacuum container, and the light emitting point array of the extraction electrode is exposed to the fluorescent light a'wrtc. A fluorescent light source tube whose image is obtained by providing slits T in opposing positions. @Patent Sabahyo range 1 JJ arrangement characterized in that the length of the light emitting point is made longer than the width of the slit of the side electric sound, and the size of the light emitting point is determined by the width of this slit. Soft fluorescent light source tube.