CN1505083A

CN1505083A - Plasma display panel

Info

Publication number: CN1505083A
Application number: CNA021521921A
Authority: CN
Inventors: 陈杰良; 吕昌岳
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2002-12-05
Filing date: 2002-12-05
Publication date: 2004-06-16
Anticipated expiration: 2022-12-05
Also published as: CN100356500C

Abstract

The invention is a plasma display panel, PDP, including a first base plate, a second one and many barrier ribs, all the barrier ribs are set on the surface of the second base plate and combined with the first and second base plates to form many discharging areas, and it charges mixed discharging gas in each discharging area. Wherein, the mixed discharging gas is composed of gases of Neon, Ne and Krypton, Kr. The percentage of Krypton gas is between 1.1 and 5%, the rest is Neon gas, and total charging pressure is from 250 to 500Torr.

Description

Plasma display panel with improved brightness

[ technical field]A method for producing a semiconductor device

The present invention relates to a plasma display panel for flat panel display.

[ background of the invention]

A plasma display panel is a flat display device, and various Direct Current (DC) or Alternating Current (AC) driven plasma display panels have been successfully developed and put into mass production. The plasma display panel has a similar light emitting principle to that of a fluorescent lamp, and is characterized in that the pixels of the plasma display panel are coated with the three-component color fluorescent powder and filled with inert gas, and the inert gas discharges to generate ultraviolet radiation to excite the fluorescent powder to emit visible light. Since the inert gas in the plasma display panel is discharged to form plasma between the electrodes, the gas discharge display panel is generally called a plasma display panel.

The kind, proportion and pressure of the inert gas filled in the display panel will affect the ignition voltage of the discharge and the brightness, efficiency and color purity of the display panel. Therefore, after the structure of the discharge cell of the plasma display panel is determined, the selection of the inert gas species, the optimization of the mixture ratio and the determination of the pressure are decisive for improving the performance of the display device.

At present, a binary or ternary mixed gas containing Xenon (Xe) is generally filled in a plasma display panel, and vacuum ultraviolet light (with a wavelength less than 200nm, wherein 147nm radiation is the main) is radiated through excited transition of Xenon atoms during gas discharge to excite fluorescent powder to emit light. In the prior art, neon and xenon or a mixed gas of helium and xenon are commonly used as a discharge gas, but besides ultraviolet light, xenon discharge also generates near Infrared light (Infrared Rays) with the wavelength range of 800-1000 nm, which can destroy the luminous color purity of the ternary color fluorescent powder and influence the image display quality of the plasma display panel.

Please refer to U.S. patent No. 6,285,129 issued on 9/4/2001, which is a plasma display device including an upper substrate, a lower substrate and a plurality of barrier ribs, wherein the upper substrate, the lower substrate and the barrier ribs form a plurality of discharge regions. In the disclosed technique, pure Helium (Helium,He) or Helium with a gas percentage of 99.5% and one or more gases of neon, argon, xenon, and nitrogen are used as a mixed discharge gas. However, the Collision Cross section (Collision Cross-section) of the helium ions is small, and the higher the gas percentage of helium, the higher the probability of the helium ions colliding with the discharge space, and the probability of Sputtering (Sputtering) the fluorescent layer and the electrode layer is increased while the kinetic energy is lost, thereby shortening the service life of the plasma display panel.

[ summary of the invention]

In order to overcome the defect that the service life of the plasma display panel is shortened due to high sputtering probability of helium ions on a fluorescent layer and an electrode layer in the prior art, the invention provides the plasma display panel with longer service life.

The technical scheme for solving the technical problem is as follows: a plasma display panel is provided, which comprises a first substrate, a second substrate and a plurality of barrier ribs, wherein the barrier ribs are arranged on the surface of the second substrate, and a plurality of discharge regions are formed by the barrier ribs, the first substrate and the second substrate, and are filled with discharge gas, wherein the discharge gas consists of neon and krypton.

The discharge gas contains krypton in a gas percentage of 1.1 to 5% and neon in the balance, and is charged at a total pressure of 250to 500 Torr.

Compared with the prior art, the invention has the following advantages: krypton ions have larger collision cross section and smaller probability of collision in a discharge space, can reduce sputtering of the fluorescent layer and the electrode layer, and prolong the service life of the plasma display panel. In addition, when krypton discharge radiates ultraviolet light, near infrared light with the wavelength range of 800-1000 nm is not generated like xenon to influence the color purity of the light emitted by the ternary color fluorescent layer, so that the plasma display panel has good image display quality.

[ description of the drawings]

Fig. 1 is an exploded perspective view of a plasma display panel according to the present invention.

Fig. 2 is a sectional view of the plasma display panel of the present invention.

[ detailed description]embodiments

Referring to fig. 1, a plasma display panel 10 of the present invention includes a first substrate 1 and a second substrate 2, wherein the first substrate 1 and the second substrate 2 respectively include a glass substrate 11 and a glass substrate 21. Display electrodes 12, 12 'arranged in parallel are arranged on the glass substrate 11 of the first substrate 1 along the horizontal direction, a dielectric layer 13 composed of low melting point glass is coated on the surfaces of the display electrodes 12, 12', and a MgO dielectric layer 14 is further coated on the surface of the dielectric layer 13. A plurality of parallel and spaced insulating barrier ribs 24 are formed on the surface of the glass substrate 21 of the second substrate 2 along the vertical direction by a low melting point glass printing method, a plurality of address electrodes 22 are arranged between the insulating barrier ribs 24, the surface of the address electrodes 22 is also coated with a dielectric layer (not shown), a ternary color fluorescent layer 23 is sequentially printed between each barrier rib 24, and the fluorescent layer 23 is tightlyattached to the side surfaces of the barrier ribs 24 and the surface of the glass substrate 21.

Referring to fig. 2, the plasma display panel 10 of the present invention is formed by hermetically sealing a first substrate 1 and a second substrate 2, after sealing, an array of spaces (not labeled) determined by their heights is formed between the insulating barrier ribs 24, and binary mixed discharge gas 25 composed of inert gas is respectively filled in the array of spaces. The corresponding discharge unit is determined by the crossing position of the display electrodes 12, 12 'and the plurality of addressing electrodes 22, pulse voltage is applied between the display electrodes 12 and the display electrodes 12', after the breakdown voltage of the mixed discharge gas 25 is reached, the mixed discharge gas 25 discharges to form plasma 15 in the space, the ultraviolet radiation light of the plasma 15 excites the fluorescent layer 23 to generate visible light, and the color display can be realized by properly mixing the ternary color fluorescent layer 23 by means of selective addressing of the addressing electrodes 22.

The mixed discharge gas 25 used in the plasma display panel 10 of the present invention is composed of neon and krypton, wherein the gas percentage of krypton is selected to be 1.1% to 5%, and the balance is neon. The Metastable state (Metastable) energy of neon atoms in the mixed discharge gas 25 is 16.7ev, which is larger than the ionization energy of krypton by 8.34ev, and the second type of internal energy conversion condition at inelastic collision, i.e. Penning discharge (Penning Effect) condition, is satisfied, and the ionization process of the mixed discharge gas 25 is as follows:

，

the ultraviolet light having a wavelength of about 350nm is radiated to excite the fluorescent layer 23 to emit visible light.

When neon in the mixed discharge gas 25 emits strong visible light spectrum radiation in the wavelength range of about 580nm during discharge, the visible light emitted by neon discharge will destroy the color purity of the light emitted by the ternary color fluorescent layer 23, and when the gas percentage of krypton is selected to be close to 1%, the phenomenon that neon discharge emits visible light is effectively inhibited, so that the mixed discharge gas 25 filled in the plasma display panel 10 of the present invention at least comprises 1.1% of krypton. The increase of the percentage of krypton in the mixed discharge gas 25 increases the firing Voltage (Breakdown Voltage), which increases the luminous efficiency and brightness of the plasma display panel 10, but the too high firing Voltage may cause the discharge of the mixed discharge gas 25 to be unstable, and may even cause arc discharge (arc) to break down the plasma display panel 10. In order to make the mixed discharge gas 25 work stably under a certain ignition voltage, the percentage of krypton gas in the mixed discharge gas 25 is not more than 5%.

The plasma display panel 10 can be filled with the mixed discharge gas 25 with different pressures, and when the pressure of the mixed discharge gas 25 is less than 100Torr, the efficiency of the ultraviolet light radiated by the mixed discharge gas 25 is low, and a higher ignition voltage is required to cause the discharge of the mixed discharge gas 25. In addition, when the pressure of the mixed discharge gas 25 is too high, for example, 760Torr (1 atm), the plasma display panel 10 is easily deformed. Therefore, the pressure of the mixed discharge gas 25 charged into the plasma display panel 10 is selected in the range of 250Torr to 500 Torr.

Claims

1. A plasma display panel comprises a first substrate, a second substrate and a plurality of barrier ribs, wherein the barrier ribs are arranged on the surface of the second substrate, and a plurality of discharge regions are formed by the barrier ribs, the first substrate and the second substrate and are filled with discharge gas, and the plasma display panel is characterized in that: the discharge gas is composed of neon and krypton.

2. The plasma display panel of claim 1, wherein: the gas percentage of krypton in the charged discharge gas is 1.1% to 5%.

3. The plasma display panel of claim 1, wherein: the total pressure of the discharge gas charged is 250Torr to 500 Torr.

4. The plasma display panel of claim 1, wherein: the first substrate includes a glass substrate and a plurality of display electrodes arranged in parallel on the glass substrate.

5. The plasma display panel of claim 4, wherein: the surfaces of the display electrodes are coated with a low-melting-point glass medium layer.

6. The plasma display panel of claim 5, wherein: the surface of the low-melting-point glass medium layer is coated with an MgO medium layer.

7. The plasma display panel of claim 1, wherein: the second substrate includes a glass substrate and a plurality of address electrodes having a dielectric layer coated on a surface thereof.

8. The plasma display panel of claim 1, wherein: a ternary color fluorescent layer is arranged between the barrier ribs.

9. The plasma display panel of claim 8, wherein: the fluorescent layer is closely attached to the side surfaces of the barrier ribs and the surface of the glass substrate.