JPH11213895A - Plasma display panel, glass substrate for plasma display panel, and glass paste for plasma display panel - Google Patents

Abstract

(57) [Problem] To prevent a malfunction of a remote control device or the like due to an operation disturbance caused by near infrared rays radiated from a front panel side of a plasma display panel. SOLUTION: A front panel 1 and a rear panel 6 of an AC type three-electrode surface discharge type PDP are sealed to each other to form Ne-Xe.
A discharge space 12 in which gas is sealed is created. The front panel 1 includes a pair of striped X and Y electrodes 3 parallel to the glass substrate 2 and a dielectric layer 4, and the glass substrate 2 contains a near infrared absorbing material 16. The rear panel 6 includes a glass substrate 7 and stripe-shaped address electrodes 8 to phosphors 11. The near-infrared ray 15 generated by the discharge of the cell selected by the three electrodes 3 and 8 is absorbed by the glass substrate 2 on the cell.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a glass substrate or glass paste for the panel. For example, the present invention relates to A
It is suitable for application to a technique for suppressing and shielding near infrared rays emitted from a C-type three-electrode surface discharge type plasma display panel.

[0002]

2. Description of the Related Art Plasma display panels (hereinafter, referred to as plasma display panels)
“PDP” has a structure in which a discharge space formed between a pair of glass substrates is filled with a discharge gas such as helium-xenon. Electrodes are formed on each of the substrates, and a predetermined voltage is applied between predetermined electrodes to generate discharge of the above-described sealed gas in a desired discharge cell. Ultraviolet light generated by the discharge excites a phosphor formed in the discharge cell, and visible light emitted from the phosphor in the excited state forms an image display of a PDP. In particular, in the case of a color display PDP, color display is realized by forming any one of red, green, and blue phosphor layers in each discharge cell. As described above, in the PDP, a predetermined image display is obtained by controlling the discharge state of the discharge cell and converting ultraviolet light generated at the time of discharge into visible light by the phosphor.

The discharge gas sealed in the PDP as described above includes a helium-xenon type or a neon-type.
A mixed gas such as xenon is used, and the xenon ratio is usually set to 10% or less. The phosphor is excited and emits light by vacuum ultraviolet rays having a wavelength of 147 nm emitted from the xenon gas during discharge.

Further, a PD having a basic structure as described above
P is an AC-type PDP having a protective layer for protecting the electrode or the dielectric layer, and a DC-type PD having a structure in which the protective layer is not provided and the electrode is exposed in the discharge space.
P can be roughly classified.

[0005]

FIG. 3 shows an emission spectrum of a PDP using a neon-xenon gas as a discharge gas at the time of white light emission. As shown in FIG. 3, since the emission spectrum has a line spectrum component 40 in the near infrared region caused by xenon gas in the characteristics of the emission spectrum, the front panel constituting the PDP using xenon as a discharge gas component, It is understood that such near infrared rays are emitted. The line spectrum component 40 does not affect image display at all, but a light emitting diode (hereinafter, referred to as “LE”) used in a remote control device or the like that is widely used today.
D), which is close to the center wavelength of the emission spectrum characteristic, causes the operation of a remote control device using such an LED to be disturbed and the device receiving the signal of the remote control device to malfunction. The above remote control device and the device on the receiving side thereof (hereinafter, referred to as
Of course, both are abbreviated as “remote control device”), which refers to a device related to the operation of the PDP device itself, but other devices installed around the PDP device, such as a video tape recorder and an air conditioner. For the remote control device described above, there is a high possibility that the line spectrum component 40 may cause the operation disturbance or the malfunction. Furthermore, the line spectrum component 40 inevitably has the above-mentioned adverse effects on various devices that use wavelengths in the vicinity of the line spectrum component 40 other than the devices using the LEDs.

In order to solve such problems, it is necessary to take measures for suppressing or shielding the near-infrared spectrum component 40 emitted from the front panel of the PDP.

Therefore, as one of the solutions to the above-mentioned problems, it is known to provide an infrared absorption filter in front of the PDP. For example, Japanese Patent Application Laid-Open No. 9-22657 discloses a hologram in front of a front substrate. Techniques for providing a filter have been proposed. In such prior art, the filter cuts out radiation in a wavelength region unnecessary for displaying an image of a PDP in a visible light emission spectrum, and simultaneously absorbs unnecessary infrared light and ultraviolet light by the same filter. This prevents adverse effects due to light in these unnecessary wavelength regions. Here, the method of manufacturing the hologram filter disclosed in the publication will be briefly described. First of all,
The first hologram is manufactured by exposing the hologram recording film in close contact with the plane mirror with an optical system using a first laser (argon laser (wavelength: 514 nm)) as a light source. Next, the light source was a dye laser (wavelength 585n).
Exposure is performed by a similar optical system in place of m) to produce a second hologram. The two holograms thus completed are bonded together with a double-sided adhesive tape to obtain a desired hologram filter. By attaching such a filter to the surface of the front substrate of the PDP using a double-sided adhesive tape, unnecessary infrared rays and the like are removed by utilizing the characteristic of the hologram filter that reflects or diffracts light in a specific wavelength region. Things.

However, the prior art has the following problems. That is, the transmission characteristics of the hologram filter include:
Since the hologram filter has a viewing angle dependency due to the reflection / diffraction characteristics, when the PDP is viewed from a large angle with respect to the vertical direction of the display surface (front substrate) of the PDP, that is, from a diagonal direction, the transmission in such a direction is performed. Since the spectral characteristics are different from the transmission spectral characteristics in the direction perpendicular to the display surface, desired transmission (absorption) characteristics are not exhibited, and a sufficient near infrared absorption effect cannot be obtained.

Further, since the hologram filter itself is expensive, a large-screen P is expected to see a large increase in demand in the future.
When a hologram filter is used for a DP, for example, a PDP having a screen size of 40 inches or more, this is a factor that hinders reduction in the price of the PDP.

Further, an optical system device for exposing a large-area hologram recording filter used for a PDP having a screen size of 40 inches or more, for example, becomes very large-scale, and in addition, covers an entire surface of the large-area hologram filter. Technical problem that uniform exposure must be realized. In order to solve such a problem, a method of attaching a plurality of small-area hologram filters to the surface of a large-area PDP is conceivable. However, in such a method, seams of hologram filters adjacent to each other become conspicuous, so that image quality is significantly reduced. This impairs the original meaning of the large screen PDP.

At the same time, the hologram filter on the front surface of the PDP must be uniformly attached without generating bubbles or the like, so that the cost of introducing an attachment device or the like also increases the price of the PDP.
In particular, for a large-screen PDP as described above, in addition to the above-mentioned problems, a technical difficulty that a large-area hologram filter must be uniformly attached to the front surface of the PDP appears.

As described above, the hologram filter proposed in Japanese Patent Application Laid-Open No. 9-22657 has the above problems.
Is practically difficult to adopt as a measure for suppressing or blocking the line spectrum component 40 shown in FIG.

As another solution to the problem of suppressing and blocking the line spectrum component 40 in the near-infrared region, there is a technique proposed in Japanese Patent Application Laid-Open No. 9-145917. In the prior art, an infrared absorbing plate applying atomic absorption of xenon gas is provided on the front surface of the PDP, and the infrared absorbing plate is sealed with an airtight member at the periphery of two glass plates, It has a structure in which xenon gas is sealed. According to the prior art, by providing this infrared absorbing plate on the front surface of the PDP, unnecessary infrared rays radiated from xenon gas, which is a component of the filling gas of the PDP, are absorbed by the xenon gas in the infrared absorbing plate. , To cut off the infrared radiation emitted from the PDP.

However, such an infrared absorbing plate cannot provide a sufficient infrared absorbing effect. The reason is shown below.

In order to prevent the above-mentioned adverse effects on devices such as a remote controller, the intensity of near-infrared rays radiated from the front substrate of the PDP must be reduced to about one tenth. However, considering that the thickness of the xenon gas layer of such an infrared absorbing plate is several millimeters to several centimeters no matter how thick, even if it is assumed that the gas pressure of xenon gas is about 1 atm, (a) Since the near-infrared absorptivity of xenon gas is small, the near-infrared intensity cannot be sufficiently attenuated to the above-mentioned value in the above thickness range.

As a solution to this problem, it is conceivable to increase the gas pressure of xenon. However, when such measures are taken, the following problems will occur. That is, (b) the thickness of the two glass plates must be increased to withstand the gas pressure, which causes a problem that the weight of the infrared absorbing plate increases. In addition, (c) the member that seals the two glass plates at the periphery thereof must have strength enough to withstand gas pressure.

As another solution to the above-mentioned problem (a), it is conceivable to increase the thickness of the xenon gas layer. However, this solution also causes the following new problem. is there. That is, (d) the thickness of the infrared absorbing plate, that is, the member that seals the two glass plates at the peripheral edge thereof is also increased, and such a member blocks the visual field in the oblique direction of the PDP. The viewing angle is limited, which is inconvenient. To avoid such a situation, it is sufficient to increase the area of the infrared absorbing plate. However, in order to secure a sufficient viewing angle, an infrared absorbing plate having an area considerably larger than the display screen of the PDP is required. So I have to say that it is not practical.

(E) Since the infrared absorbing plate is provided on the front surface of the PDP, the thickness of the infrared absorbing plate is added to the thickness of the PDP as a display, and some member for holding the absorbing plate is required. Cost.

As described above, the problems (b) to (e) resulting from the use of the infrared absorbing plate are as follows.
This significantly impairs the lightweight and thin features of the DP.

As described above, the infrared absorbing plate proposed in Japanese Patent Application Laid-Open No. 9-145917 includes the above-mentioned (a) to (f).
Because of the problem described above, it must be said that the technique for suppressing or blocking the line spectrum component 40 is a technique that is not worth using.

As mentioned above, the two prior arts are PDP
Is common in that a member having an infrared absorption function is separately provided on the front surface of the PDP, but (i) an inherent problem caused by unnecessary near-infrared components in the PDP due to insufficient infrared absorption function Not only can be a drastic solution to (i) that the members employed are expensive,
ii) There are many additional members to be provided on the front surface of the PDP, and the advanced peripheral technology has caused new problems such as high cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems caused by the near-infrared ray component radiated from the front panel of a PDP. An object of the present invention is to provide a PDP and a material thereof capable of sufficiently suppressing and shielding unnecessary near-infrared radiation generated at the time of discharge of a discharge gas.

[0023]

(1) A plasma display panel according to the first aspect of the present invention is an AC type three-electrode surface discharge type including a front panel and a rear panel which are sealed to each other to form a discharge space. A plasma display panel, wherein the front panel itself has a near-infrared absorption function.

(2) The plasma display panel according to the second aspect of the present invention is the plasma display panel according to the first aspect, wherein the front panel includes a front substrate containing a near-infrared absorbing material and transmitting visible light. It is characterized by having.

(3) The plasma display panel according to the third aspect of the present invention is the plasma display panel according to the first aspect, wherein the front panel has a front substrate and a surface of the front substrate on the discharge space side. A pair of electrodes formed, a dielectric layer formed so as to entirely cover the surface of the glass substrate and the surfaces of the pair of electrodes, wherein the dielectric layer contains a near-infrared absorbing material It is characterized by the following.

(4) The plasma display panel according to the fourth aspect of the present invention is the plasma display panel according to the second or third aspect, wherein the near-infrared absorbing material is a transition metal ion.

(5) The glass substrate for a plasma display panel according to the fifth aspect of the invention is characterized by containing a transition metal ion for absorbing near-infrared rays.

(6) The glass paste for a plasma display panel according to the sixth aspect of the invention is characterized by containing a transition metal ion for absorbing near-infrared rays.

[0029]

(Embodiment 1) FIG. 1 is a longitudinal section showing the configuration of an AC type three-electrode surface discharge type plasma display panel (hereinafter abbreviated as "PDP") according to Embodiment 1 of the present invention. It is a diagram, and first, the configuration of the PDP will be described with reference to FIG.

The PDP shown in FIG. 1 is roughly composed of a front panel 1 and a back panel 6. The front panel 1 has a glass substrate 2 containing a near-infrared absorbing material 16 (described later) indicating the PDP according to the first embodiment as a front substrate, and the panel 1 further includes one of the glass substrates 2. On the surface, there is provided a striped electrode 3 in which an X electrode and a Y electrode form a pair and extend in the first direction. However, in FIG. 1, only one of the pair of electrodes 3 is shown for convenience of illustration. In addition, the X electrode and the Y electrode, which are the pair of electrodes 3, are usually composed of a transparent electrode and a metal electrode (bus electrode) for supplementing the conductivity of the transparent electrode. Only the transparent electrode is illustrated in order to avoid the formation of a transparent electrode.

Further, the front panel 1 covers the entire surface of the electrode 3 and the portion of the glass substrate 2 where the electrode 3 is not formed (ie, the surface on the side of the discharge space 12). A dielectric layer 4 formed so as to cover and a protective film 5 formed of, for example, magnesium oxide (MgO) and capable of accumulating wall charges formed so as to entirely cover the surface of the dielectric layer 4. Prepare.

On the other hand, as shown in FIG. 1, the back panel 6 comprises a glass substrate 7 as a back substrate and an electrode 3
A plurality of stripe-shaped address electrodes 8 formed on one surface of the glass substrate 7 so as to extend in a second direction orthogonal to the first direction in a form orthogonal to the first direction; Address electrode 8 on one surface
And a base layer 9 made of a dielectric material, which is formed so as to entirely cover the portion where no is formed.
In the following, the glass substrate 7 including the address electrodes 8 will be described.
And the underlayer 9 are collectively referred to as a “back substrate”. Further, the rear panel 6 has a stripe-shaped white barrier rib 10 (except for the top portion) formed on the surface of the underlying layer 9 between the adjacent address electrodes 8 and extending in the second direction in parallel with the electrode 8. And a phosphor layer 11 formed in a space defined by the side walls of the adjacent barrier ribs 10 and the surface of the base layer 9. That is, since the top of each barrier rib 10 and the surface of the protective film 5 are in contact with each other, the discharge space defined by the opposing side wall surfaces of the adjacent barrier ribs 10, the surface of the base layer 9, and the surface of the protective layer 5. Reference numeral 12 extends in the second direction. In the discharge space 12, the phosphor 11 is applied to a portion other than the surface of the protective layer 5 as described above. In addition,
For convenience of the following description, FIG. 1 shows a state in which the top of the barrier rib 10 and the surface of the protective layer 5 are separated. In addition, the phosphor layer 11 is usually coated with a red, green or blue phosphor for each of the above spaces, thereby realizing a PDP for color display.

The PDP is arranged such that one surface of the front panel 1 having the above-mentioned structure and one surface of the rear panel 6 face each other, and the peripheral portions of both panels 1 and 6 (not shown). )). A predetermined discharge gas made of, for example, neon-xenon is sealed in a gap between the panels 1 and 6, and the discharge space 12 is defined by the gap. Further, since the visible light 14 emitted from the phosphor layer 11 passes through the front panel 1 and is recognized by a viewer, the other surface of the glass substrate 2 may be referred to as a display surface 2S.

A PDP having the above-described structure is manufactured including the following steps.

First, the glass substrate 2 containing the near infrared absorbing material 16 is prepared in advance. Here, the near infrared absorbing material 1
A method for manufacturing the glass substrate 2 containing the metal 6 will be described. The glass material used for the glass substrate 2, for example, soda lime glass, is usually produced by a float method. In this production method, a glass material melted in a melting furnace is poured onto tin melted at a high temperature. This is a method of forming a flat plate by floating on molten tin. A glass substrate having a near-infrared absorption function can be easily obtained by mixing and dispersing the near-infrared absorbing material 16 in the glass material of the float method and melting them together. Regarding the glass substrate 2 used for the PDP according to the first embodiment, divalent iron ions are selected as the near-infrared absorbing material 16, and ferrous oxide (FeO) is mixed and dispersed in the glass raw material. Near infrared absorption function is realized.
In FIG. 1, the near-infrared absorbing material (divalent iron ion) 16 is illustrated as a black point in order to facilitate understanding of the essence of the first embodiment and to facilitate the description. Although the iron ions are not actually observed in the glass substrate 2, the glass substrate 2 is slightly darkened.

Next, the process proceeds to the process of manufacturing the front panel 1.
First, on one surface of a glass substrate 2, which is a base material of the front panel 1, a transparent electrode is patterned in a predetermined stripe shape using an exposure method, and thereafter, for example, screen printing of a silver paste is performed. Accordingly, a striped metal electrode corresponding to the shape of the transparent electrode is formed on a part of the surface of the transparent electrode. After that, the silver paste, which is a metal electrode, is dried and fired to form an X electrode and a Y electrode, that is, a pair of electrodes 3.

Next, the low melting glass paste was applied to the electrode 3
An organic material that is screen-printed so as to entirely cover the upper portion and one surface of the glass substrate 2 on which the electrode 3 is not formed, and is included in the paste via a drying process of the glass paste Is removed, and the paste is allowed to stand in an atmosphere at a temperature of about 550 ° C. for about 30 minutes, thereby firing the glass paste. Thus, a transparent dielectric layer 4 is formed. Further, a magnesium oxide (MgO) thin film serving as the protective film 5 is formed on the entire surface of the dielectric layer 4 by an electron beam evaporation method.

On the other hand, the manufacture of the back panel 6 is as follows. First, a material such as a silver paste is screen-printed on one surface of the glass substrate 7, and a drying and baking process is performed to form the stripe-shaped address electrodes 8.

On the address electrodes 8 and on the glass substrate 7
A low-melting glass paste is screen-printed so as to entirely cover a part of the surface where the address electrodes 8 are not formed, and then a drying step and a baking step are performed. Is formed. in this case,
The base layer 9 is made of a material that is white with respect to visible light so that light emitted from the phosphor layer 11 toward the back panel 6, that is, in the direction opposite to the display surface 2S, is reflected toward the display surface 2S. .

Next, a plurality of barrier ribs 10 are formed between adjacent address electrodes 8 in a stripe shape parallel to the electrodes 8 by using a screen printing method. At this time, the barrier rib 10 is formed so that the height thereof is about 130 μm by repeating printing and drying of a white or black glass paste many times. And
The barrier rib 10 is formed by a sintering process (550 ° C., 30
Minutes).

Then, in a space defined by the side walls of the adjacent barrier ribs 10 and the surface of the underlayer 9, each phosphor paste obtained by mixing a resin powder and a phosphor powder corresponding to red, blue, and green, and a solvent. Are printed alternately,
After the phosphor paste is dried and fired, the phosphor layer 1
1 is formed.

Next, the electrodes 3 and the address electrodes 8 are formed at right angles through a glass frit (not shown in FIG. 1) applied to a peripheral portion other than the display area on one surface side of the back panel 6. The rear panel 6 and the front panel 1 are overlapped so as to intersect, and in this state, the panels 1 and 6 are heat-treated to be sealed. After the air inside the PDP is exhausted through an exhaust pipe (not shown) provided in advance on the glass substrate 7, neon-xenon gas as a discharge gas is sealed at a predetermined pressure, and the end of the exhaust pipe is sealed. By stopping, the PDP is completed.

In a PDP manufactured by the above-described process and having such a structure, as shown in FIG. 1, ultraviolet rays 13 generated in the discharge space 12 excite the phosphor 11 and the phosphor 11 emits visible light 14. An image is displayed by radiating the light to the display surface 2S side. At this time, the discharge space 1
Near-infrared rays 15 generated from xenon gas in 2 are absorbed by divalent iron ions which are near-infrared absorbing materials 16 contained in the glass substrate 2. Therefore, the PDP according to the first embodiment is a conventional PDP having no near-infrared absorption function.
Compared with the DP, the near-infrared ray 15 transmitted to the display surface 2S side of the front panel 1, that is, the line spectrum component 40 in the near-infrared ray region in the emission spectrum characteristic during the xenon discharge shown in FIG. 3 can be suppressed or blocked. Having. As a result, in the present embodiment, it is possible to effectively prevent the operation interference of the remote control device using the light emitting diode having the wavelength used near the line spectrum 40, in particular, the malfunction of the device that receives the signal of the remote control device. The effect that it can be obtained is obtained. In addition, the near-infrared absorption function of the divalent iron ions contained in the glass substrate 2 does not have a viewing angle dependence unlike the hologram filter proposed in Japanese Patent Application Laid-Open No. 9-22657. Have an advantage over

Further, the above-described operation and effect can be obtained only by changing the glass substrate of the front panel in the conventional PDP to the glass substrate 2 containing the near-infrared absorbing material 16, so that the present embodiment 1 As for the production of PDP, it is possible to follow the apparatus and technology conventionally used as it is, without adding a new member and a production process for realizing the near-infrared absorption function. Accordingly, Japanese Patent Application Laid-Open No. 9-226
As in the prior art proposed in Japanese Patent Application Laid-Open No. 57-145917 and Japanese Patent Application Laid-Open No. 9-145917, it is absolutely necessary to provide a separate high-cost member such as a hologram filter or an infrared absorbing plate in front of the display surface of the front panel. No, especially,
Unlike the hologram filter proposed in Japanese Patent No. 22657, a large-scale separate apparatus for manufacturing such a filter, an advanced manufacturing technique, and a technique for attaching such a filter are not required at all. Therefore, it can be said that the PDP according to the first embodiment is superior to the above two prior arts in that it is a PDP manufactured by a simple and low-cost method.

Further, as in the prior art proposed in Japanese Patent Application Laid-Open No. 9-145917, in order to compensate for the insufficient infrared absorption effect, the thickness of the infrared absorption plate itself is increased,
Since the area is not enlarged, there is no need to consider increasing the weight of the infrared absorbing plate or enhancing the sealing force.

(Modification 1 of Embodiment 1) Here, a modification of the structure of the PDP according to Embodiment 1 will be described. In the PDP according to this modification, the near-infrared absorption function of the glass substrate 2 (see FIG. 1) of the PDP according to Embodiment 1 is realized by another material.
This is different from the PDP according to the first embodiment. That is, instead of divalent iron ions, divalent nickel ions are employed as a near-infrared absorbing material, and a glass substrate is formed from the glass material mixed and dispersed with nickel oxide (NiO) by the above-described float method. .

According to the PDP using the glass substrate thus formed as a base material of the front panel, the near-infrared absorbing function of the divalent nickel ions can be applied to the first embodiment.
The same operations and effects as those of the PDP according to the present invention can be obtained, and Japanese Patent Application Laid-Open Nos. 9-22657 and 9-1
Compared to the prior art proposed in Japanese Patent No. 45917,
It has an excellent effect similarly to the PDP according to the first embodiment.

The near-infrared absorbing material is not limited to the above-mentioned divalent iron ions or divalent nickel ions, and other transition metal ions having a near-infrared absorbing function may be used. For example, in addition to the above two transition metal ions, divalent ions such as cobalt, chromium, manganese, and copper can be mentioned.
O, MnO, CuO, etc.)
By dispersing, a glass substrate having a near-infrared absorption function can be formed by the above-described float method. The glass substrate of the front panel having the near-infrared absorbing function realized in this way can exhibit the same operation and effect as the above-mentioned glass substrate containing iron ions and nickel ions, and It also has an advantage.

Since chromium ions, manganese ions, and copper ions among the above-mentioned transition metal ions also absorb in the visible region, there is a possibility that the luminance of PDP in the visible region may be reduced. For this reason, it is necessary to adjust the desired characteristics in consideration of the balance between the absorption characteristics in the near infrared region and the transmission characteristics in the visible region. It can be said that a glass substrate used as an absorber is a more preferable embodiment.

It is to be noted that a mixture of plural kinds of the above transition metal ions may be used as the glass substrate.

(Modification 2 of Embodiment 1) Although the PDP according to Embodiment 1 described above is a so-called AC type, adaptation of the technical idea according to Embodiment 1 is limited to AC type PDP. is not. That is, the AC type P according to the first embodiment
DP is proposed as a solution to the problem that the near-infrared ray component generated by the discharge of the discharge gas of the PDP causes operation disturbance and malfunction of a remote control device or the like. Can also be generated, and sufficiently suppressing and shielding the near-infrared component transmitted through the front panel of the PDP requires A
This is a common purpose in both C-type and DC-type PDPs.

Therefore, the DC PDP according to the second modification example
Describes a method in which a glass substrate 2 (see FIG. 1) having a near-infrared absorption function in the PDP according to the first embodiment
It is characterized in that it is provided as a glass substrate forming the front panel of the above. Therefore, a DC PDP having a glass substrate having a near-infrared absorption function as a front substrate can obtain the same effect as the AC PDP according to the above-described first embodiment, and is superior to the above-described prior art. Can maintain sex.

(Embodiment 2) Next, an AC type three-electrode surface discharge type PDP according to Embodiment 2 will be described.

The PDP according to the second embodiment is different from the PDP according to the first embodiment in that the near-infrared absorption function of the glass substrate 2 (see FIG. 1) is different from that of the dielectric shown in FIG. The second embodiment 1 and the second embodiment are characterized in that the layer 24 (corresponding to the dielectric layer 4 in FIG. 1) includes a near-infrared absorbing function of the front panel.
Are common. Hereinafter, the structure of the PDP according to the second embodiment and a method for manufacturing the same will be described with reference to the vertical cross-sectional view shown in FIG. 2, but different points from the PDP according to the first embodiment will be mainly described. The same components as those of the PDP according to No. 1 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 2, a front panel 21 includes a glass substrate 22 as a front substrate, an electrode 3 formed on one surface of the substrate 22, an electrode 3, and a surface of the glass substrate 22. A near-infrared absorbing material 16 entirely formed so as to cover a portion where the electrode 3 is not formed in
That is, it includes a dielectric layer 24 containing divalent iron ions and a thin film of magnesium oxide (MgO), which is to be the protective film 5 and is formed entirely on the surface of the dielectric layer 24.

The manufacture of the dielectric layer 24 is as follows. First, a low-melting glass paste in which first iron oxide (FeO) is mixed and dispersed is prepared in advance, and this glass paste is formed on the surface of the glass substrate 22 by using a screen printing method. After about 5
The dielectric layer 24 is formed through a baking process in an atmosphere at a temperature of 50 ° C. for about 30 minutes. In this manner, a transparent dielectric layer 24 containing divalent iron ions 16 as a near infrared absorbing material is formed. In FIG. 2, in order to help the understanding of the essence of the second embodiment and to facilitate the explanation, a near-infrared absorbing material (divalent iron ion) 16
Are shown as black dots, although the above iron ions are not actually observed in the dielectric layer 24,
The glass substrate 2 is slightly darkened.

Rear panel 6 is a PDP according to the first embodiment.
The structure of the front panel 21 and the rear panel 6 is the same as that of the first embodiment.

According to the structure of the PDP according to the second embodiment, the near-infrared ray 15 generated from the xenon gas in the discharge space 12 at the time of displaying an image becomes the near-infrared absorbing material 16 contained in the dielectric layer 24. The near-infrared ray 15 transmitted through the display surface 22S of the front panel 21, that is, the xenon shown in FIG. 3, as compared with the conventional PDP having no near-infrared ray absorption function. This has the effect of suppressing or blocking the line spectrum component 40 in the near infrared region in the emission spectrum characteristics during discharge. Therefore, it is possible to effectively prevent the operation of the remote controller using the light emitting diode having the wavelength used in the vicinity of the line spectrum 40, and in particular, the malfunction of the device receiving the signal of the remote controller can be effectively prevented. Can be In addition, Japanese Patent Application Laid-Open Nos.
With respect to the prior art proposed in 145917,
It goes without saying that the same superiority as the PDP according to the first embodiment can be secured.

(Modification of Second Embodiment) Here, a modification of the structure of the PDP according to the second embodiment will be described. The PDP according to the present modification is different in that the near-infrared absorbing function of the dielectric layer 24 of the PDP according to the second embodiment is realized by another material. That is, 2
Divalent nickel ions are used as near-infrared absorbers instead of valent iron ions, and a low melting glass paste mixed with nickel oxide (NiO) is used.
4 is formed.

Further, as described in the modification of the first embodiment, the near-infrared absorbing material is not limited to the above-mentioned divalent iron ion or divalent nickel ion, but may be another transition metal having a near-infrared absorbing function. An ion may be used. For example, in addition to the above two, a divalent ion such as cobalt, chromium, manganese, and copper may be used. Such a dielectric layer is made of an oxide containing the above-mentioned divalent transition metal (CoO, CrO, MnO, CuO
) Is screen-printed so as to cover a portion of the electrode 3 and one surface of the glass substrate 22 where the electrode 3 is not formed, and a drying and baking process. Formed.

According to the PDP provided with the dielectric layer 24 realized in this manner, the PDP according to the first and second embodiments is provided by a near-infrared absorbing function of divalent nickel ions or the like.
The same operation and effect as those described in JP-A-9-22 can be obtained.
The PDPs according to the first and second embodiments also have an advantage over the prior arts proposed in Japanese Patent Application Laid-Open No. 657 and hei 9-145917.

Since chromium ions, manganese ions, and copper ions among the above-mentioned transition metal ions also have an absorption in the visible region, there is a possibility that the luminance of PDP in the visible region may be reduced. Therefore, it is necessary to adjust the desired characteristics in consideration of the balance between the absorption characteristics in the near infrared region and the transmission characteristics in the visible region, as described in the modification of the first embodiment. In this regard, a glass substrate employing iron ions, nickel ions, and cobalt ions as the near-infrared absorbing material is more preferable.

Of course, the dielectric layer 24 may contain a plurality of transition metal ions.

(Modifications Common to First and Second Embodiments) (1) The barrier ribs 10 and the phosphor layers 11 are directly formed on the surface of the glass substrate 7 without forming the underlayer 9 shown in FIGS. It may be formed above. Also in this case, since the address electrodes 8 are formed on the surface of the glass substrate 7, the "back substrate" can be considered to have the address electrodes 8.

(2) It is also possible to form a PDP by combining the first and second embodiments. In this case, the near-infrared ray generated in the discharge space is absorbed not only in the portion corresponding to the dielectric layer 24 in FIG. 2 but also in the portion corresponding to the glass substrate 2 in FIG.
The intensity of near infrared rays can be further attenuated.

According to the structure described above, the glass substrate having various advantages over the conventional one has a slightly darkened glass substrate on which a divalent transition metal is mixed and dispersed. Formed (transmissivity is lower than ordinary glass)
Therefore, the influence of external light entering the inside of the PDP through the front panel 21 from the side of the display surface 2S or 22S can be reduced, thereby improving the contrast.

[0067]

(1) According to the first aspect of the present invention, P
Since the front panel of the DP itself can exhibit a near-infrared absorption function, when, for example, xenon gas is contained as a component of the discharge gas of the PDP, the near-infrared component generated by the discharge of the xenon gas is converted to the front panel. And can sufficiently absorb the near-infrared ray component generated inside the PDP through the front panel.
Can be shielded. Therefore, it is possible to effectively prevent the operation of the remote controller using the LED using the wavelength in the near infrared region and the malfunction of the device that receives the signal of the remote controller.

(2) According to the second aspect of the present invention, the PD
Since the front substrate itself forming the front panel of P contains a near-infrared absorbing material, an expensive separate member as in the prior art proposed in JP-A-9-22657 and JP-A-9-145917 is used. There is no need to provide it further on the front panel. For this reason, the same effect as the above (1) can be obtained by a simple and low-cost method as compared with the above prior art.

In addition, according to the second aspect of the present invention, P
Since the front substrate of DP itself contains a near infrared absorbing material,
It has an advantage over the prior art in that there is no viewing angle dependency unlike the hologram filter proposed in Japanese Patent Application Laid-Open No. 9-22657. Further, Japanese Patent Laid-Open No. 9-1
As in the prior art proposed in Japanese Patent No. 45917, the thickness, area, and weight of the infrared absorbing plate itself required to compensate for the insufficient infrared absorbing effect also increase the sealing strength of the absorbing plate. According to the second aspect of the present invention, there is an effect that it is unnecessary.

(3) According to the third aspect of the invention, the PD
Since the dielectric layer itself forming part of the front panel of P contains a near-infrared absorbing material, the same effects as in the above (1) and (2) can be obtained.

(4) According to the second and third aspects of the invention, as in the hologram filter proposed in Japanese Patent Application Laid-Open No. 9-22657, a large-scale separate apparatus for manufacturing such a filter and advanced manufacturing No technology is required, and the equipment and technology conventionally used can be followed. Therefore, the same effects as in the above (1) to (3) can be obtained by a simple and low-cost method as compared with the above-mentioned prior art.

(5) According to the fourth aspect of the present invention, the near-infrared absorbing material is a transition metal ion.
The same effect as (4) can be obtained.

(6) According to the fifth or sixth aspect of the present invention, since the glass substrate or the glass paste for PDP contains transition metal ions for near-infrared absorbing material,
The same effects as the above (1) to (5) can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a structure of an AC type three-electrode surface discharge type plasma display panel according to Embodiment 1 of the present invention.

FIG. 2 is a longitudinal sectional view showing a structure of an AC type three-electrode surface discharge type plasma display panel according to a second embodiment of the present invention.

FIG. 3 is a graph showing emission spectrum characteristics of a PDP using xenon gas as a discharge gas.

[Explanation of symbols]

1 front panel, 2 glass substrate, 3 X, Y electrodes, 4
Dielectric layer, 6 back panel, 12 discharge space, 15
Near infrared, 16 near infrared absorbing material, 21 front panel.

Claims (6)

[Claims] 1. An AC type three-electrode surface discharge type plasma display panel including a front panel and a rear panel sealed to each other to form a discharge space, wherein the front panel itself has a near-infrared absorption function. Characterized by a plasma display panel. 2. The plasma display panel according to claim 1, wherein the front panel includes a front substrate containing a near-infrared absorbing material and transmitting visible light. 3. The plasma display panel according to claim 1, wherein the front panel includes: a front substrate; a pair of electrodes formed on a surface of the front substrate on the discharge space side; A dielectric layer formed so as to entirely cover the surfaces of the pair of electrodes, wherein the dielectric layer contains a near-infrared absorbing material. 4. The plasma display panel according to claim 2, wherein the near-infrared absorbing material is a transition metal ion. 5. A glass substrate for a plasma display panel, comprising a transition metal ion for absorbing near-infrared rays. 6. A glass paste for a plasma display panel, comprising a transition metal ion for absorbing near-infrared rays.