JPH0565973B2 - - Google Patents

Description

[Detailed description of the invention]

【0001】

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display discharge lamp used in a display panel and the like, and particularly to a display discharge lamp which is devised to achieve high brightness.

[0002]

[Prior Art] Conventionally, display boards mounted on the rooftops or external walls of buildings, such as scroll-type display boards and matrix-type display boards, have been used as media for providing information and advertising to a large number of people outdoors. exist. As a display light source used in such a display panel, a display discharge lamp 21 as shown in FIG. 3 has been proposed by the applicant of the present invention. This display discharge lamp 21 has a back substrate 22 made of an electrically insulating material and a front substrate 23 made of a transparent electrically insulating material such as glass, which are arranged opposite to each other with a discharge gap separated by a spacer 24, and are connected to a neon light. ,
It is housed in an airtight container 3 filled with a discharge gas mainly consisting of a rare gas such as argon or a mixture thereof. A first electrode 5 ₁ made of a transparent conductive film such as tin oxide is deposited on the surface of the rear substrate 22, and the surface of the first electrode 5 ₁ is made of a transparent material such as glass. It is covered with a first dielectric layer 6 ₁ , and a reflective layer 4 made of aluminum foil, aluminum evaporated film, or the like for reflecting light is formed on the back surface. A second electrode 5 ₂ made of a transparent conductive film such as tin oxide is deposited on the surface of the front substrate 23 facing the first electrode 5 ₁ of the rear substrate 22.
The surface of the electrode 5 ₂ is covered with a light-transmitting second dielectric layer 6 ₂ made of glass or the like. Further, lead wires 7, 7 are led out from the ends of the first electrode 5 ₁ and the second electrode 5 ₂ and connected to the upper ends of external terminals 8, 8. With this configuration, it becomes possible to drive the display discharge lamp 21 with a high-frequency alternating electric field, which solves the problem of reduced life characteristics caused by driving the display discharge lamp with a DC power supply. In addition to being able to obtain long life characteristics, the luminance modulation of the display discharge lamp can be easily performed by changing the frequency of the alternating electric field. The first electrode 5 ₁ and the second electrode of this display discharge lamp 21
When a predetermined high-frequency alternating electric field is applied between the electrodes 5 ₂ , discharge light emission occurs in response to the discharge gas sealed in the airtight container 3 . The light transmitted through the front substrate 23 of the above-mentioned emitted light is collected by the convex lens portion 3a of the airtight container 3 and radiated as information, and the light transmitted through the transparent dielectric layer 6 and the transparent first electrode 5 ₁ , The light transmitted through the second electrode ₅₂ and the back substrate 22 is
Reflected by the reflective layer 4, the back substrate 22 and the first electrode 5
_1. The convex lens portion 3a passes through the first dielectric layer 6 ₁ , the second dielectric layer 6 ₂ , and the second electrode 5 ₂ again.
Since the light is condensed and radiated upward, most of the light emitted by the discharge is used for illumination without leaking out unnecessarily.

[0003]

[Problems to be Solved by the Invention] However, in the display discharge lamp 21 described above, the light emitting area is spread over the entire front substrate 23 and the light is widely dispersed, so it is required to be installed outdoors in bright light and has a strong contrast. The brightness was insufficient for use in display panels. Therefore, an object of the present invention is to realize a display discharge lamp with high brightness so that it can be used satisfactorily even in bright environments such as outdoors.

[0004]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the display discharge lamp of the present invention has a first electrode and a first dielectric layer covering the first electrode formed on the surface. An insulating substrate having a second electrode and a second dielectric layer covering the second electrode formed on the surface thereof are arranged with a discharge gap in between, and a discharge gas is filled in the insulating substrate. The device is characterized in that the insulating substrate is housed in a light-transmitting airtight container, and the respective end faces of the insulating substrates are disposed so as to face the light emission direction in the airtight container. In addition, a configuration in which a plurality of sets of insulating substrates on which the first electrode and the first dielectric layer are deposited and insulating substrates on which the second electrode and the second dielectric layer are deposited is arranged is provided. It's also good.

【0005】

[Function] An insulating substrate having a first electrode and a first dielectric layer covering the first electrode formed on the surface thereof, a second electrode covering the surface thereof, and a second dielectric layer covering the second electrode. An insulating substrate having a dielectric layer formed thereon is disposed across a discharge gap, and the insulating substrate is housed in a light-transmitting airtight container filled with a discharge gas. By arranging the end face toward the direction of light emission in the airtight container,
The light emitted from the surface of the insulating substrate is concentrated in a substantially linear shape, resulting in a small light emitting area and high brightness. In the case where a plurality of sets of insulating substrates on which the first electrode and the first dielectric layer are deposited and insulating substrates on which the second electrode and the second dielectric layer are deposited are arranged. In particular, the light emitting area is increased and a display discharge lamp with even higher brightness can be obtained.

[0006]

Embodiment FIG. 1 is a schematic cross-section of a display discharge lamp of the present invention. 1 in the figure is a display discharge lamp of the present invention, in which five insulating substrates 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , 2 ₅ made of a translucent material such as glass are respectively arranged using spacers or the like. These insulating substrates 2 are arranged side by side with a space of about 0.1 to 0.3 mm between them, and the end surfaces 2a of these insulating substrates 2 are arranged in an airtight container 3 with the end faces 2a facing the light emission direction. This airtight container 3 has a convex condensing lens part 3a formed in the upper part in the light radiation direction, and a sealing part 3b in the bottom part.
A flat stem having a so-called bottom stem 3c
It is made of transparent glass and is filled with an ultraviolet emitting gas mainly composed of rare gases such as helium and xenon or a mixture thereof.

[0007] On one side of the insulating substrate ₂₁ , a reflective layer 4 made of aluminum foil or aluminum evaporated film for reflecting light is deposited, and on the other side, a transparent conductive film such as tin oxide is formed. At the same time, the surface of the electrode _{5 1} is coated with a transparent dielectric layer 6 ₁ made of glass or the like, and the surface of the dielectric layer 6 ₁ is coated with magnesium oxide having ion bombardment resistance. A protective film (not shown) consisting of
It is deposited to a thickness of about 150 to 250 nm. A lead wire 7 ₁ is led out from one end of the electrode 5 ₁ and connected to the upper end of the external end 8 ₁ .

[0008] On one side of the insulating substrate ₂₂ , an electrode ₅₂ , a dielectric layer ₆₂ , and a protective film (not shown) are respectively deposited and formed on the other side _of the insulating substrate 21, and an electrode is formed on the other side. 5 ₃ , a dielectric layer 6 ₃ , and a protective film (not shown) are respectively deposited thereon. Lead wires 7 ₂ and 7 ₃ are led out from one end of the electrodes 5 ₂ and 5 ₃ , respectively, and the lead wire 7 ₂ is connected to the upper end of the external terminal 8 ₂ , and the lead wire 7 ₃ is connected to the lead wire 7 ₁ . is connected to.

[0009] The insulating substrate 2 ₃ is similar to the insulating substrate 2 ₂ ,
An electrode ₅₄ , a dielectric layer ₆₄ , and a protective film (not shown) are formed on one side, and an electrode ₅₅ , a dielectric layer ₆₅ , and a protective film (not shown) are formed on the other side. is forming. And the above electrode 5 ₄ ,
Lead wires 7 ₄ and 7 ₅ are led out from one end of 5 ₅ , and the lead wire 7 ₄ is connected to the lead wire 7 ₂ and the lead wire 7 ₅ is connected to the lead wire 7 ₁ .

[0010] Similarly to the insulating substrate 2 ₂ , the insulating substrate 2 ₄ is
An electrode 5 ₆ , a dielectric layer 6 ₆ , and a protective film (not shown) are formed on one side, and an electrode 5 ₇ , a dielectric layer 6 ₇ , and a protective film (not shown) are formed on the other side. is forming. Then, the electrode 5 ₆ ,
Lead wires 7 ₆ and 7 ₇ are led out from one end of the lead wire 7 ₇ , and the lead wire 7 ₆ is connected to the lead wire 7 ₂ and the lead wire 7 ₇ is connected to the lead wire 7 ₁ .

[0011] An electrode 58, a dielectric layer ₆₈ , and a protective film (not shown) are formed on one surface _{of the insulating substrate 25 facing the insulating substrate 24 , and} the insulating substrate ₂₁ is formed on the other surface. The reflective layer 4 is formed similarly. A lead wire 7 ₈ is led out from one end of the electrode 5 ₈ and connected to the lead wire 7 ₂ .

[0012] In addition, a reflective layer 4 made of aluminum foil, aluminum vapor deposition film, etc. for reflecting light is applied in one direction to the end faces in three directions excluding the upper end face 2a in the light emission direction of the insulating substrates 2 arranged in parallel. A reflecting plate 9 is disposed, and the light emitted in a direction excluding the upper end face 2a, which is the light emission direction, is reflected by the reflecting layer 4 and is finally reflected in the airtight container 3. The light is emitted upward from the convex light lens section 3a. The above lead wires 7 ₁ , 7 ₂ , 7 ₃ , 7 ₄ , 7 ₅ , 7 ₆ , 7
Although not particularly shown in the drawings, ₇ and 7 ₈ may have a structure in which a tube body made of a glass tube or an insulating coating is coated in order to prevent abnormal discharge.

[0013] However, in the display discharge lamp 1 having the configuration as described above, when a predetermined high frequency alternating electric field is applied to the external terminals 8 ₁ and 8 ₂ , the electrodes 5 ₁ and 5 ₂
between electrodes 5 ₃ and 5 ₄ ; between electrodes 5 ₅ and 5 ₆ ; and between electrodes 5 and 5.
A discharge is generated in each discharge gap between ₇ and ₅ , and light emission corresponding to the discharge gas is obtained. The light emitted from the surface of the insulating substrate 2 as described above is concentrated in a substantially linear shape from the upper end surface 2a of the insulating substrate 2, increasing its brightness, and is emitted upward from the condensing convex lens portion 3a of the airtight container 3. be done.

[0014] FIG. 2 shows another embodiment of the display discharge lamp 1 of the present invention, in which five insulating substrates 2 ₁ , 2
₂ , 2 ₃ , 2 ₄ , and 2 ₅ are arranged in a so-called mountain shape with the central insulating substrate 2 ₃ as the apex and the other insulating substrates gradually lowered, and the individual insulating substrates 2 ₁ ,
2 ₂ , 2 ₃ , 2 ₄ , and 2 ₅ themselves are also mountain-shaped. With such a configuration, the insulating substrates 2 ₁ , 2 ₂ ,
The peak-shaped tips of 2 ₃ , 2 ₄ , and 2 ₅ fit into the concave shape of the upper inner periphery of the airtight container 3, so that the entire area can be used as the light emitting portion of the insulating substrate 2 without forming the entire area in the narrow space of the airtight container 3. By effectively utilizing it as a display discharge lamp 1, it becomes possible to provide a display discharge lamp 1 with excellent brightness characteristics.

【0015】

Effects of the Invention As detailed above, according to the display discharge lamp of the present invention, the first electrode and the first electrode are provided on the surface.
an insulating substrate having a first dielectric layer covering an electrode formed thereon; and an insulating substrate having a second electrode and a second dielectric layer covering the second electrode formed on its surface. The insulating substrates are arranged with a discharge gap in between and housed in a light-transmitting airtight container filled with a discharge gas, and each end face of the insulating substrate is oriented in the light emission direction in the airtight container. This makes it possible to modulate brightness by driving with a high-frequency alternating electric field, making it possible to display intermediate gradations, and the light emitted on the surface of the insulating substrate is concentrated, making it possible to emit light from a conventional discharge in a planar manner. This makes it possible to realize a display discharge lamp with extremely high brightness compared to display discharge lamps. In the case where a plurality of sets of insulating substrates on which the first electrode and the first dielectric layer are deposited and insulating substrates on which the second electrode and the second dielectric layer are deposited are arranged. The display panel using the display discharge lamp of the present invention can provide excellent information even in bright environments such as outdoors. It can have a communication effect and an advertising effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a display discharge lamp of the present invention.

FIG. 2 is a schematic perspective view showing another embodiment of the insulating substrate used in the display discharge lamp of the present invention.

FIG. 3 is a cross-sectional view of a conventional display discharge lamp.

[Explanation of symbols]

1...Display discharge lamp 2...Insulating substrate 2a...End face 3...Airtight container ₅₁ to ₅₈ ...Electrode ₆₁ to ₆₈ ...Dielectric layer.

Claims (2)

[Claims] Claim 1: An insulating substrate having a first electrode and a first dielectric layer covering the first electrode formed on the surface, a second electrode and the second electrode covering the surface; An insulating substrate on which a second dielectric layer is adhered is placed across a discharge gap, and is housed in a light-transmitting airtight container filled with discharge gas. A display discharge lamp characterized in that each end face is disposed with each end face facing the direction of light emission in an airtight container. 2. A plurality of sets of insulating substrates on which the first electrode and the first dielectric layer are deposited, and insulating substrates on which the second electrode and the second dielectric layer are deposited are arranged. A display discharge lamp characterized by: