JPH05159705A - Method of testing reliability of picture display element - Google Patents

Abstract

PURPOSE:To ascertain various problems brought with deposition and diffusion of an alkaline component and the reliability of their countermeasure in a short time to shorten the development period in a display receptacle made of soda lime quartz glass for use in a picture display element. CONSTITUTION:In a display receptacle 1 made of soda lime quartz glass for use in a picture display element, the movement of alkaline component in glass is stirred up by increasing the temperature of atmosphere. In addition, a feeding lead terminal 7 is grounded, and a large potential is brought thereto by applying a higher voltage than a rating voltage thereto thereby accelerating the deposition and diffusion of alkaline component in a glass to the side of a glass frit to ascertain various problem brought with the deposition and diffusion of alkaline component and their reliability for a short time and to shorten the duration of development.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reliability test method for an image display device of the type which utilizes a high voltage and irradiates an electron beam.

[0002]

2. Description of the Related Art Conventionally, as a reliability test of an image display device, various tests including an acceleration test have been carried out according to the purpose of confirmation. Among them, in the image display device using soda lime silica glass,
If the ambient temperature is high or you are operating for a long time,
Various problems occur in the sealing part, such as insulation failure between the power supply lead terminals, precipitation of alkaline components at the interface between the surface container and glass frit, and cracks in the glass sealing part of the surface container. Was. It is considered that this is because the alkaline component contained in the component diffuses into the glass frit with time to reduce the lead oxide in the glass frit and deposit it as metallic lead. In addition, regarding various problems of the surface container and the glass frit interface, similarly, alkaline components and metallic lead are deposited on the surface of the glass frit interface of the surface container to reduce the adhesive strength between the surface container and the glass frit, and Precipitation of metallic lead at the interface of the frit causes dielectric breakdown, which may cause cracks on the side of the front container, resulting in destruction of the image display device. Such problems were at the level where they could be confirmed only after operating for thousands of hours.

[0003]

Therefore, in the conventional confirmation method, even if a countermeasure is taken, it takes a very long time to confirm the reliability, and the development period is lengthened.

The present invention confirms reliability in a short time,
The purpose is to shorten the development period.

[0005]

In order to solve the above problems, the reliability test method of the image display device of the present invention is to raise the temperature of the atmosphere and to drop the power supply lead terminal to the ground to obtain a high rating. The acceleration test is performed by applying a high voltage higher than the voltage.

[0006]

The present invention activates the movement of the alkaline component in the glass by raising the temperature of the atmosphere, and
By dropping the power supply lead terminal to the ground and applying a high voltage higher than the rated high voltage to create a larger potential difference, the diffusion and precipitation of the alkaline component in the glass to the glass frit side is accelerated. Is.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A reliability test method for an image display device according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a front container made of soda lime silica glass. 2 is an anode terminal for supplying high voltage. 3 is a phosphor formed on the image portion of the front container 2. Four
Is a surface electrode including a signal electrode and a deflection electrode. 5 is a back container having a cathode. Reference numeral 6 is a glass frit that adheres and joins the front container 1 and the back container 5. Reference numeral 7 is a lead terminal for feeding power to the surface electrode 4 and serves as a ground.

Next, the operation of this embodiment will be described. In FIG. 1, the image display element is, for example, 120 ° C.
A high voltage of, for example, 15 Kv is supplied to the front container 1 from the anode terminal 2, and the phosphor 3 applied to the image surface portion is uniformly applied with the high voltage. On the other hand, the lead terminal 7 for feeding the surface electrode 4 is grounded. Therefore, the alkaline component in the surface container 1 is ionized to become + and moves to the power supply lead terminal 7 which is the ground. When this test was carried out for one day, precipitation of an alkaline component at the interface between the surface container 1 and the glass frit 6, and further reduction of the insulation resistance between the power supply lead terminals 7 due to diffusion into the glass frit 6, In parallel with this, the glass frit 6 of the front container 1
It was possible to confirm the precipitation of metallic lead and the occurrence of cracks at the interface with. Therefore, the reliability of the image display device could be confirmed. That is, the reliability test of the image display device can be performed in one day by creating an environment like the method of the present invention.

[0010]

According to the reliability test method of the image display device of the present invention, the movement of the alkaline component in the glass can be activated, and the diffusion and precipitation to the glass frit side can be accelerated to be performed in a short time. Therefore, it is possible to confirm the problems associated therewith and the reliability of the countermeasures in a short time, and the development period can be shortened.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a reliability test method for an image display device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Back Container 2 Anode Terminal 3 Phosphor 4 Surface Electrode 5 Back Container 6 Glass Frit 7 Power Supply Lead Terminal

Claims (1)

[Claims] 1. A front container made of soda lime silica glass whose surface is coated with a phosphor, and a back container provided with a cathode,
A surface electrode provided between the both containers is provided, the front container and the back container are sealed with a glass frit, and the glass frit portion is sandwiched with a lead terminal for supplying power to the surface electrode. In the reliability test method of the image display device of vacuum degree, the temperature of the atmosphere is raised, the power supply lead terminal is dropped to the ground, a high voltage higher than the rated high voltage is applied, and an acceleration test is performed. Test method for reliability of image display device.