KR100606705B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel that can be used to ensure the extended life of the panel and to ensure the discharge stability by using a mixed green phosphor in the manufacture of plasma display panel (PDP), the top plate; Barrier ribs separated and formed at a predetermined interval on a lower plate corresponding to the upper plate; It includes and consists of red phosphor, green mixed phosphor, and blue phosphor that are regularly arranged in the spaced portions of the partitions and are formed of a material having all polarities having the same surface charging polarity.

PDP, green phosphor

Description

Plasma display panel {Plasma display panel}

1 is a block diagram of a surface discharge plasma display panel of the prior art

2 is a cross-sectional view of a surface discharge plasma display panel according to the related art.

3 is a block diagram of a surface discharge plasma display panel according to the present invention

4 is a cross-sectional view of a surface discharge plasma display panel according to the present invention.

Explanation of symbols for the main parts of the drawings

31.Top Glass 32. Bottom Glass

33. sustain electrode 34. address electrode

35.Bus electrode 36.Bulk wall

37. Dielectric Layer 38. Protective Layer

39a. Red phosphor 39b. Green mixed phosphor

39c. Blue phosphor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP). In particular, the present invention relates to a plasma display panel that is capable of prolonging the lifespan and discharging stability of a panel using a mixed green phosphor.

Plasma Display Panel (Plasma Display Panel) is a next-generation display that displays characters or graphics by using light generated by excitation of a phosphor by 147 nm ultraviolet (UV) light, which is typically generated when a He + Xe or Ne + Xe gas is discharged. In addition to being easy to thin and large in size, image quality is greatly improved thanks to recent technology development.

Hereinafter, a plasma display panel according to the related art will be described with reference to the accompanying drawings.

1 is a configuration diagram of a surface discharge plasma display panel of the prior art, Figure 2 is a cross-sectional configuration diagram of a surface discharge plasma display panel of the prior art.

Recently, various display devices have emerged due to various desires for display quality and many studies on enlargement, flattening, and slimming of display devices.

Among them, the plasma display panel (PDP) has attracted the most attention as a large flat panel wall-mounted display device because of its wide viewing angle, strong nonlinearity, memory function, and magnetic resistance.

The structure of the surface-discharge plasma display panel of the prior art includes a top glass 1, two sustain electrodes 3 formed electrically side by side on the surface of the top glass 1, and a sustain electrode 3, respectively. The top plate is composed of a dielectric layer 7 and a protective layer 8 which are sequentially formed on the top surface.

Here, the upper plate includes a bus electrode 5 used as an electrode line for applying a voltage waveform to the sustain electrode 3 configured in pixel units.

And between the address electrode 4 and the dielectric layer 7a and the address electrodes 4 formed in the direction perpendicular to the sustain electrode 3 formed on the upper glass 1 on the lower glass 2. The lower plate consists of partitions 6 formed in the direction and phosphors 9a, 9b, 9c of R, G, and B formed on the partitions 6.

Here, (YGd) BO ₃ : Eu ³⁺ is used as the red (R) phosphor 9a as the phosphor formed between the partition walls 6 of the lower plate, and Zn ₂ SiO is used as the green (G) phosphor 9b. ₄ : Mn ²⁺ is used, and a blue (B) phosphor 9c is formed by coating phosphors of BaMgAl ₁₀ O ₁₇ : Eu ²⁺ , respectively.

As such, when the panel is manufactured using (Y, Gd) BO ₃ : Eu ³⁺ in red, Zn ₂ SiO ₄ : Mn ²⁺ in green, and BaMgAl ₁₀ O ₁₇ : Eu ²⁺ in blue, Has the same effect.

That is, these phosphors cause a difference in address voltage and response time due to charging characteristics and dielectric constant differences in addition to disadvantages of panel life.

In particular, the Zn ₂ SiO ₄ : Mn ²⁺ phosphor, which is a green phosphor, is unlikely to be prolonged in life because it is most vulnerable to ion bombardment, unlike the red and blue phosphors, and the charging property is negatively charged and the dielectric constant is low. Accumulation of charges is not easy.

Therefore, discharge delay and address miss occur at high speed driving.

This requires an additional address discharge voltage to cause stable discharge, resulting in an increase in the address discharge voltage of the green cell.

In addition, due to negative (-) charging characteristics, the impact of the cationic impact on the phosphor is increased, resulting in a decrease in lifespan.

2 is a plasma display panel using (YGd) BO ₃ : Eu ³⁺ as a red phosphor, Zn ₂ SiO ₄ : Mn ²⁺ as a green phosphor, and BaMgAl ₁₀ O ₁₇ : Eu ²⁺ as a blue phosphor in the prior art. Shows a detailed cross-sectional structure.

2, it can be seen that the surface charging polarity of the red phosphor and the blue phosphor is (+), and only the surface charging polarity of the green phosphor is (-).

In the plasma display panel of the related art using such R / G / B phosphors, the green phosphor coated on the anode has a weakness against ion bombardment during discharge, thereby limiting its lifespan.

Considering that the definition of the lifetime is the luminance half-life, since the luminance of the green phosphor occupies the largest 60% of the luminance of the panel, it is necessary to extend the life of the green phosphor to extend the lifetime of the PDP.

In addition, the Zn ₂ SiO ₄ : Mn ²⁺ phosphor has a negative polarity and a low dielectric constant than the blue and red phosphors, and thus it is difficult to secure discharge stability.

As a result, an address miss and a high temperature misfiring occur at a high speed. To solve this problem, an additional voltage is required to secure a stable discharge.

Such a plasma display panel of the prior art has the following problems.

The Zn ₂ SiO ₄ : Mn ²⁺ green phosphor is vulnerable to the ion bombardment of the discharge gas during discharge, making it difficult to prolong the life of the panel.

In addition, unlike other blue and red phosphors, the charging characteristics are negative (-) chargeability and the dielectric constant is also small, the wall charges are not easy to accumulate in the discharge of the green cell shows a difference in the discharge pattern.

As a result, the discharge variation is increased, an address miss occurs during high-speed driving, and an increase in the address voltage is inevitable in order to secure the stability of the discharge.

The present invention is to solve the problems of the conventional plasma display panel, it is an object of the present invention to provide a plasma display panel that can be used to ensure the long life and stable discharge of the panel using a mixed green phosphor.

Plasma display panel according to the present invention for achieving the above object is an upper plate; partitions formed on the lower plate corresponding to the upper plate at regular intervals; regularly arranged in the spaced portion of the partitions, the surface charging polarity is It is characterized in that it comprises a red phosphor, a green mixed phosphor, a blue phosphor, all formed of a material having the same polarity.

Hereinafter, a plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a configuration diagram of the surface discharge plasma display panel according to the present invention, Figure 4 is a cross-sectional configuration diagram of the surface discharge plasma display panel according to the present invention.

The present invention provides a green phosphor for forming a plasma display panel (Ba, Sr, Mg). By using a mixed phosphor obtained by mixing aAl ₂ O ₃ : Mn ²⁺ and a ReBO ₃ : Tb ³⁺ phosphor at a predetermined ratio, It is for improving the service life and discharge stability.

The structure of the surface discharge type plasma display panel according to the present invention is first, the top glass 31, the two sustain electrodes (33) which are formed independently and side by side on the surface of the top glass 31, and the holding The top plate is composed of a dielectric layer 37 and a protective layer 38 sequentially formed on the electrode 33.

Here, the upper plate includes a bus electrode 35 used as an electrode line for applying a voltage waveform to the sustain electrode 33 configured in units of pixels.

And an address electrode 34 formed in a direction perpendicular to the sustain electrode 33 formed on the upper substrate 31 on the lower glass 32, and a partition wall formed in the same direction between the address electrodes 34. The lower plate is composed of the 36 and the phosphors 39a, 39b, 39c of R, G, and B formed on the partition walls 36.

Here, as the phosphor formed between the partition walls 36 of the lower plate, (YGd) BO ₃ : Eu ³⁺ is used as the red (R) phosphor 39a so that the phosphor surface charging characteristic is (+), and blue ( B) The phosphor 39c is formed by coating phosphors of BaMgAl ₁₀ O ₁₇ : Eu ²⁺ , respectively.

In order to secure the long life and discharge stability of the panel, the green phosphor is formed using a material having the same (+) charge characteristics as the red and blue phosphors with the surface charging characteristics.

That is, the present invention replaces Zn ₂ SiO ₄ : Mn ²⁺ with green phosphor, which is resistant to ion bombardment, has a tendency to be charged (+) and has a dielectric constant similar to that of blue and red phosphors (Ba). Green mixed phosphor (39b) in which aAl ₂ O ₃ : Mn ²⁺ and ReBO ₃ : Tb ³⁺ phosphors (Re is a rare earth element: Y, Gd, La, Sc, Ce) are mixed at a predetermined ratio. Use

4 shows a detailed cross-sectional structure of a plasma display panel using a green mixed phosphor, (YGd) BO ₃ : Eu ³⁺ as a red phosphor, and a BaMgAl ₁₀ O ₁₇ : Eu ²⁺ phosphor as a blue phosphor. will be.

4, it can be seen that the surface charging of both the red phosphor, the blue phosphor, and the green phosphor is positive.

The plasma display panel according to the present invention not only extends the life of the PDP, but also reduces address discharge voltage and discharge variation, thereby preventing address miss during high-speed driving, thereby achieving stabilization of discharge.

In addition, the charging tendency of the phosphors in the PDP is equalized (+) to reduce the discharge difference according to the R, G, and B cells, thereby achieving uniform discharge. prevent.

In the present invention, the panel formation is the same as that of the conventional surface discharge plasma display panel in the case of the upper plate, and in the case of the lower plate, the address electrode 34 is deposited on the lower glass 32 and the dielectric layer 37a is formed. .

After the partition 36 is formed thereon, (Y, Gd) BO ₃ : Eu ³⁺ is used as the red phosphor 39a between the partitions 36, and BaMgAl ₁₀ O ₁₇ : Eu is used as the blue phosphor 39c. ²⁺ is used, and as the green mixed phosphor 39b, (Ba, Sr, Mg) .aAl ₂ O ₃ : Mn ²⁺ and ReBO ₃ : Tb ³⁺ phosphor (Re: Y, Gd, La, Sc, Ce) The mixed phosphor mixed with a predetermined ratio is applied.

Here, the mixing ratio of the green mixed phosphor 39b is (Ba, Sr, Mg). 1-99 wt% of the aAl ₂ O ₃ : Mn ²⁺ phosphor, and the ReBO ₃ : Tb ³⁺ phosphor (Re is a rare earth element: Y , Gd, La, Sc, Ce) is mixed.

In ReBO ₃ : Tb ³⁺ phosphor, Re is a rare earth element and any of Y, Gd, La, Sc, and Ce can achieve the same effect.

In the plasma display panel according to the present invention, the green phosphor is (Ba, Sr, Mg) .aAl ₂ O ₃ : Mn ²⁺ and ReBO ₃ : Tb ³⁺ phosphor (Re is a rare earth element: Y, Gd, La, By using it as a mixed phosphor of Sc, Ce, it has strong resistance to ion bombardment, and its dielectric constant is similar to that of blue and red phosphors, respectively, and its charging tendency is positively charged to secure discharge stability.

Such a plasma display panel according to the present invention has the following effects.

First, a green phosphor for a plasma display panel is (Ba, Sr, Mg) .aAl ₂ O ₃ : Mn ²⁺ and ReBO ₃ : Tb ³⁺ phosphor (Re is a rare earth element: Y, Gd, La, Sc, Ce) The life of the panel can be extended by using mixed phosphors mixed at a constant ratio.

Second, by using the green mixed phosphor, it is possible to suppress address miss and lower the address voltage to improve discharge stability.

Claims (6)

In the plasma display panel including a red plate, a green mixed phosphor, and a blue phosphor formed on the upper plate, partition walls separated at regular intervals on the lower plate corresponding to the upper plate, and regularly arranged in the spaced portions of the partition walls, The (Ba, Sr, Mg) .aAl2O3: Mn2 + phosphor was mixed with ReBO3: Tb3 + phosphor (Re is any one of rare earth elements: Y, Gd, La, Sc and Ce) as the green mixed phosphor. A plasma display panel using a phosphor. delete delete The plasma display panel of claim 1, wherein the surface charging polarity of the green mixed phosphor is (+). delete delete

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