JPH02165554A - Flat light-emission discharge lamp - Google Patents

Abstract

PURPOSE:To reduce the cost of a large-size color display unit and increase its efficiency by arranging a single cathode at a body which constitutes a plurality of picture elements and forming a discharge path with a common opening between the single cathode and an anode of each compartment. CONSTITUTION:A single cathode 33 is arranged at the central part of the bottom of a rectangular dish-like body 21 which constitutes a plurality of picture elements 29 to use the single cathode 33 in common. The plurality of picture elements 29 are made to selectively emit light with a prescribed color to reduce power consumption. A discharge path is formed in a single flat long-hole like opening 32 between the cathode 33 and an anode 24 of each compartment. Thereby, it is possible to reduce the cost of a large-size color display unit and increase its efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flat-emitting discharge lamp used in pixels of large color displays, etc.

[Conventional technology]

Large color display devices installed outdoors, such as in baseball stadiums, are required to have high brightness and clarity, and to meet this demand, there are devices that use flat-emitting discharge lamps for color pixels.

This planar discharge lamp has discharge paths of red, green, and blue light emitted in one planar configuration, and an example thereof will be described with reference to FIGS. 3 and 4.

The planar discharge lamp (1) shown in the figure has a square main body (2) whose upper end opening is closed with a translucent plate glass (3), and a glass tube is placed in the center of the back of the main body (2). (4) is sealed.

The main body (2) is made of ceramic and has four internal partition walls (2).
a) to (2d) are four identically shaped first to fourth compartments (
It is divided into 5a)~(5d), and each compartment room (5a)~(5d).
5d) Fluorescent II with red, tight, and blue luminescent colors on the inside! (6
R) (6G) (6B> is formed.

At the center of the bottom of the main body (2) are the first to fourth compartments (5a) to
A discharge hole (7) is formed which communicates with (5d), and this discharge hole (7) communicates with a glass tube (4) enclosing one common cathode (8).

The first to fourth compartments (5a) to (5d) are approximately U-shaped in plan, and have an anode (9) penetrating through the main body (2) and sealed at the end opposite to the discharge hole (7). - are fixedly arranged one by one. These first to fourth compartments (5a) to (5d) are covered with plate glass (3
), four first to fourth discharge paths m1 to m4, which are lit independently with one cathode (8) as a common cathode, are formed. (4
) are sealed with low melting point glass (10) (11).

When an appropriate voltage is applied to the cathode (8) and each of the anodes (9) to cause arc discharge in the first to fourth discharge paths m1 ``'' m4, the generated ultraviolet rays cause each discharge path m1 to The fluorescent films (6R) (6G) (6B) in m 4 emit light, and the light is transmitted through the plate glass (3) and radiated to the outside. In this case, by controlling the currents flowing through the first to fourth discharge paths m1 to m4, the color of the emitted light in each of the discharge paths m1 to m4 is selected from red, green, or blue. In this way, one discharge lamp (1) is used as one pixel of a color display. Specifically, if the emitted light color of the first discharge path m1 is red, for example, the second and fourth discharge paths m on both sides thereof
2, the emission color of m4 is green, and the emission color of the remaining third discharge path ms is blue. Therefore, when a predetermined current is passed through only the first discharge path m1 to turn it on, the discharge lamp (1) emits red light, and when a respective current is passed through all the first to fourth discharge paths ffl1-m4, the discharge lamp (1) emits red light. When turned on, the discharge lamp (1)
The three luminous colors of red, green, and blue are combined to produce white light.

In addition, this white lighting is substantially the first to third discharge paths m1 to m
This can also be done by lighting only 3, but this does not produce a clear white color due to the strength of the red, green, and blue light emitted by the human eye, so the discharge lamp (1) emits green light. Usually, the area is twice as large as the red and blue light emitting areas, and all the first to fourth discharge paths m1 to m4 are simultaneously turned on to emit clear white light.

[Problem to be solved by the invention]

Incidentally, a large color display device is constructed by arranging a large number of pixels in a vertical and horizontal arrangement on the same plane, but when the above-mentioned discharge lamp (1) is used in a large color display device, one discharge lamp (1 ) constitutes the l#i element of a large color display screen, so a large number of discharge lamps (1) (
1) Requires... Therefore, the above discharge lamp (1) (
1) Correspondingly to the number of -, the number of cathodes (8), (8), - also increases, leading to problems in that the cost of large color display devices increases and power consumption increases.

The present invention has been proposed in view of the above-mentioned problems, and its purpose is to provide a flat-emitting discharge lamp that can reduce the cost and improve the efficiency of large color display devices. .

[Means to solve the problem]

The technical means for achieving the above object of the present invention is to integrally form a partition wall that divides the interior of the rectangular dish-shaped body into a large number of compartments that serve as discharge paths, and the inside of each compartment is colored red and green. , a plurality of pixels are formed along the longitudinal direction of the main body by forming fluorescent films of blue luminescent color in a predetermined arrangement relationship, and the upper end opening of the main body is closed with a translucent lid, and an anode of each compartment is formed. A single cathode that communicates with the main body to form a discharge path that lights up independently is disposed at the center of the bottom of the main body, and a cathode that communicates with each compartment of the discharge path along the longitudinal direction of the main body. This is a flat-emitting discharge lamp with a single flat elongated opening.

[Effect]

According to the present invention, a single cathode is disposed at the center of the bottom of a rectangular dish-shaped main body that includes a plurality of pixels, so that the cathode can be shared by a plurality of pixels. This allows multiple pixels to selectively emit light in a predetermined color using a single cathode, thereby achieving low power consumption. Further, a discharge path is formed between the cathode and the anode of each compartment by a single planar elongated opening, and the plurality of pixels are integrated in the structure.

(Example) An example of a flat-light discharge lamp according to the present invention will be described with reference to FIGS. 1 and 2.

In the flat-emitting discharge lamp (20) shown in Figs. 1 and 2, (21) is a rectangular dish-shaped body made of ceramic;
22) is a plate glass serving as a translucent lid that closes the upper end opening of the main body (21), and is sealed with a low melting point glass (23). (24) is a glass tube sealed with low melting point glass (25) at the center of the back surface of the main body (21). (26)
(2B)- and (27a) to (27d) are the main body (
21) into many (16 in the figure) compartments (28a).
~ (28d) A partition wall divided into sections! '! ,
(26) (26) divides the inside of the main body (21) into four parts along its longitudinal direction and configures a plurality of pixels, for example, four pixels (29) (29) -, as described later, and further, Partition walls (27a) to (27d) (hereinafter referred to as 1st
~ 4th partition wall) is each pixel (29) (29)
- four identically shaped compartments (28a) to (2
8d) (hereinafter referred to as 1st to 4th compartments) (
30R) (30G) (30B) each pixel (29) (29
)-- for each of the first to fourth compartments (28a) to (2
A fluorescent film formed on the inner surface of the first compartment (28a) - for example, red for the first compartment (28a) and red for the second and fourth compartments (28b).
)・-(28d)... is green, the third compartment (28
c) - has a fluorescent film (30R) (3
0G) (30B). (31) is the main body (21)
The discharge hole (32) formed in the center of the bottom of the main body (21
) is a single planar elongated hole-shaped opening provided along the longitudinal direction in the center of the pixel (29).
The compartments (28a) to (28d) are commonly communicated with each other. This opening (32) communicates with the glass tube (24) at the bottom of the main body (21) through the discharge hole (31).

(33) is a cathode sealed in the glass tube (24),
4 consisting of the first to fourth compartments (28a) to (28d)
This is a single thing common to all three pixels (29).
(34)・are the first to fourth compartments (28a) to (28
d), an anode that penetrates the main body (21) and is sealed at the end opposite to the opening (32) of the discharge hole (31).

By closing the first to fourth compartments (28a) to (28d) with plate glass (22), each of the first to fourth compartments (28a) to (28d) is closed.
a) - (28d), one anode (34) - is fixedly arranged, and each pixel (29) - has a common cathode (33) in the first to fourth compartments (28a) to (28d). )
A total of 16 first to fourth discharge paths m that are lit independently between
Form I-m4.

The lighting operation of the discharge lamp (20) is performed by applying an appropriate voltage to the cathode (33) and each anode (34).
When arc discharge is caused in discharge paths m1-m4, fluorescent light 1!!! (30R) (30G) (30B) in each discharge path ffl 1 "' ff14 is emitted by the generated ultraviolet rays, and the light illuminates the plate glass (22). It is transmitted and radiated to the outside.

Here, since the above-mentioned lighting operation is the same for each pixel (29) (29)-, the lighting operation for one pixel (29) will be specifically described below.

That is, by controlling the current flowing through the first to fourth discharge paths mI''m4, the color of the emitted light in each of the discharge paths m1 to m4 is selected from red, green, or blue. 1
When a predetermined current is applied to only the discharge path m1 to turn it on, the pixel (29) in the discharge lamp (20) emits red light, and all the first to fourth discharge paths mI-m4 are supplied with their respective currents. When the pixel (29) is turned on, the three emitted colors of red, green, and blue are combined and the pixel (29) lights up white.

The discharge lamp (20) has each pixel (29) (29L-
. . are turned on as described above and used as four pixels of a large color display.

〔Effect of the invention〕

In the flat-emitting discharge lamp according to the present invention, since a single cathode is disposed in the main body, which is composed of a plurality of pixels, the cathode can be shared among the plurality of pixels, reducing power consumption and being put into practical use. It is possible to provide a highly efficient flat-emitting discharge lamp with great commercial value.

In addition, since a discharge path is formed by a common opening between a single cathode and the anode of each compartment, the structure of the discharge lamp that integrates multiple pixels can be simplified and the ease of assembly can be greatly improved. .

[Brief explanation of the drawing]

FIG. 1 is a plan view including a partial cross section showing an embodiment of a flat-light discharge lamp according to the present invention, and FIG. 2 is a front view including a partial cross section of the discharge lamp of FIG. FIG. 3 is a plan view including a partial cross section showing a conventional example of a flat-emitting type discharge lamp, and FIG. 4 is a front view including a partial cross section of a discharge lamp of 3RYJ. (21) - Rectangular circular main body, (22) - Transparent lid, (26), (27a) to (27d) - Partition wall, (
28a) ~(28d)-compartment room, (29)~...
One pixel, (30R) (30G) (30B) - Fluorescent film, (32) - Opening, (33) - Cathode,
(34)...-Anode, m1-m4--Discharge path. 22=λ first five q 30R, kk, 30B two t□ deficiency a, w, zl+'14:
&tk Patent applicant: NEC Home Electronics Co., Ltd.

Claims (1)

[Claims] (1) A rectangular dish-shaped main body is integrally formed with a partition wall that divides the interior into a number of compartments that serve as discharge paths, and a fluorescent film with red, green, and blue luminescent colors is installed on the inside of each compartment. A plurality of pixels are formed in an array relationship along the longitudinal direction of the main body,
The upper end opening of the main body is closed with a translucent lid, and a single cathode is disposed in the center of the bottom of the main body, which communicates with the anode of each compartment to form a discharge path that lights up independently. A flat emitting discharge lamp characterized in that a single flat elongated hole-shaped opening is provided in the center of the main body along its longitudinal direction and communicates with each compartment of the discharge path.