KR20050042404A - Plasma dispaly panel for reducing light loss - Google Patents

Abstract

A plasma display panel for reducing light loss is disclosed. According to the present invention, a plurality of substrates are disposed to face each other; a plurality of electrodes formed on the substrate to generate a discharge; a dielectric layer to bury the electrodes; and a partition wall formed on an opposite surface of the substrate to partition a discharge space. And red, green, and blue phosphor layers coated on the inner side of the partition wall; and reflecting means disposed in the non-discharge region between the discharge spaces and installed to prevent light generated from the discharge spaces from leaking into the non-discharge regions. By including, it is possible to minimize the loss of light generated from the discharge space.

Description

Plasma display panel for reducing light loss

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel for reducing light loss having an improved structure in order to minimize light loss due to scattering of light into a non-discharge area.

Typically, a plasma display panel injects and discharges a discharge gas on two substrates having a plurality of electrodes, and then applies a discharge voltage. When the gas emits light between the electrodes due to the discharge voltage, an appropriate pulse voltage is applied. It refers to a flat panel display that is applied to address a point where two electrodes intersect to implement a desired number, letter or graphic.

The plasma display panel may be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and may be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

The DC plasma display panel has a structure in which all electrodes are exposed to a discharge space, and charges are directly transferred between corresponding electrodes. On the other hand, in the AC plasma display panel, at least one electrode is embedded in the dielectric layer, and instead of direct charge transfer between the corresponding electrodes, the ions and electrons generated by the discharge adhere to the surface of the dielectric layer to form a wall. It is possible to form a wall voltage and to maintain discharge by a sustaining voltage.

On the other hand, in the opposite discharge type plasma display panel, an address electrode and a scan electrode are provided to face each unit pixel, and addressing discharge and sustain discharge are generated between the two electrodes. On the other hand, in the surface discharge plasma display panel, an address electrode and a sustain electrode corresponding to each unit pixel are provided to generate addressing discharge and sustain discharge.

Referring to FIG. 1, a conventional plasma display panel 10 includes a pair of sustain electrodes 12, a bus electrode 13, a front dielectric layer 14, and a lower surface of the front substrate 11. The protective film layer 15 is formed.

An address electrode 120 and a back dielectric layer 130 are formed on an upper surface of the back substrate 110 disposed to face the front substrate 11.

The barrier rib 140 and red, green, and blue phosphor layers 150 are coated between the front and rear substrates 11 and 110 so as to be spaced apart from each other by a predetermined interval.

In the conventional plasma display panel 10, the process of forming each layer on the front and rear substrates 11 and 110 may be relatively easy. However, the plasma display panel 10 may not realize a high quality screen.

That is, the conventional plasma display panel has been mainly manufactured in VGA class (640 × 480) or SVGA class (800 × 600), but high resolution is required to manufacture the plasma display panel (1920 × 1035) for HDTV. Can be.

On the other hand, the partition wall 140 is a strip type, the lower portion is wider and has a narrower pyramid cross section toward the upper side, this structure is a structure that can crosstalk (crosstalk) between adjacent cells during discharge, high brightness, high efficiency There will be restrictions.

In order to improve such a low brightness phenomenon, Japanese Patent Laid-Open No. 2001-243885 disclosed in Fig. 2 forms a light shielding film in the non-discharge region.

That is, in the plasma display panel 20, an XY electrode 22 is disposed on the front substrate 21, and a bus electrode 23 having a double layer structure is formed on one side of the XY electrode 22. The XY electrode 22 and the bus electrode 23 are embedded by the dielectric layer 24. The passivation layer 25 is formed on the top surface of the dielectric layer 24.

An address electrode 220 is disposed on the rear substrate 210, a dielectric layer 230 is embedded in the address electrode 220, and a partition wall 240 is formed on an upper surface of the dielectric layer 230.

In addition, a black light blocking film 29 is formed in the non-discharge space.

The operation of the conventional plasma display panel having the above structure will be described with reference to FIG. 3 as follows.

When a driving voltage is applied to the pair of sustain electrodes 12, surface discharge occurs in the discharge regions on the front surface of the dielectric layer 14 and the passivation layer 15 to generate ultraviolet rays. Colorization is indicated as the fluorescent material of the surrounding phosphor layer 150 is excited by the generated ultraviolet rays.

Accordingly, 147 nanometers of ultraviolet rays are generated while the inert gas is excited in the discharge space. The generated ultraviolet rays generate visible light as they collide with the fluorescent material of the phosphor layer 150 surrounding the address electrode 120 and the partition wall 140.

However, as shown by the arrow, the panel 20 leaks light through the upper end of the partition wall 140, causing light loss.

That is, when the discharge image is picked up by the discharge image pickup device, the discharge image appears relatively bright around the partition wall 140 on the edge side of the discharge space. This is because the intensity of light is relatively large compared to the center of the electrode, and the size of light is relatively large.

Therefore, there is a need for a means for minimizing the loss due to the scattering of light by reflecting light leaking into the non-discharged region back into the discharge space.

In addition, due to the light loss due to the scattering of light, it results in a decrease in the color purity of red, green, blue.

The present invention is to solve the above problems, to provide a plasma display panel to minimize the light loss by blocking the light scattered to the non-discharge area, and thereby to reduce the light loss by improving the color purity of red, green, blue. Its purpose is to.

In order to achieve the above object, a plasma display panel for reducing light loss according to an aspect of the present invention,

A plurality of substrates facing each other;

A plurality of electrodes formed on the substrate to generate a discharge;

A dielectric layer filling the electrode;

A partition wall formed on an opposite surface of the substrate to partition a discharge space;

Red, green, and blue phosphor layers coated on the inner side of the partition wall; And

And reflecting means disposed in the non-discharge regions between the discharge spaces and installed to prevent the light generated from the discharge spaces from leaking into the non-discharge regions.

The reflecting means may protrude from one surface of the substrate toward the upper end of the partition wall so as to reflect light leaking into the non-discharge region into the discharge space.

Further, the reflecting means is formed so that the cross-sectional area is narrowed from one surface of the substrate toward the direction in which the partition wall is arranged.

In addition, the reflecting means is characterized by being embedded by a dielectric layer.

Furthermore, a black stripe layer is formed on the substrate in order to improve contrast in the non-discharge region, and the reflecting means is formed on one surface of the black stripe layer.

Plasma display panel for reducing the light loss according to another aspect of the present invention,

Front substrate;

A strip-shaped sustain electrode formed on the bottom surface of the front substrate;

A bus electrode electrically connected to the sustain electrode;

A front dielectric layer filling the sustain electrode and the bus electrode;

A rear substrate disposed to face the front substrate;

An address electrode formed on an upper surface of the rear substrate;

Barrier ribs formed between the front and rear substrates;

A phosphor layer of red, green, and blue applied in the discharge space partitioned by the partition wall; And

And a reflecting means disposed in the non-discharge area between the pair of sustain electrodes and formed to prevent the light generated from the discharge space from leaking out.

Plasma display panel for reducing the light loss according to another aspect of the present invention,

Front substrate;

A strip-shaped bus electrode formed on the front substrate;

A sustain electrode having an X electrode and a Y electrode formed in opposite directions from both sidewalls of the adjacent bus electrode and disposed in a discharge space;

A front dielectric layer filling the bus electrode and the sustain electrode;

A rear substrate provided to face the front substrate;

An address electrode formed on the rear substrate in a direction orthogonal to the bus electrode;

A back dielectric layer filling the address electrode;

A partition wall disposed between the front and rear substrates in a lattice shape to partition a discharge space;

Red, green, and blue phosphor layers applied in the discharge space partitioned by the partition wall; And

And a reflecting means disposed in a non-discharge region between the pair of bus electrodes on which the sustain electrodes are formed, and formed to prevent leakage of light generated from the discharge space.

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

4 shows a plasma display panel 40 according to a first embodiment of the present invention.

Referring to the drawings, the plasma display panel 40 is provided with a front substrate 41 and a rear substrate 410 disposed to face the front substrate 41.

The lower surface of the front substrate 41 is patterned with a strip form and alternately arranged X electrodes 42 and sustain electrodes 44 made of Y electrodes 43. The sustain electrode 44 is a transparent conductive electrode, preferably an ITO conductive film. The sustain electrode 44 has a strip shape.

The bus electrode 45 is formed at one side of the lower surface of the X electrode 42 and the Y electrode 43 along its longitudinal direction. The bus electrode 45 is formed to compensate for the voltage drop caused by the line resistance of the sustain electrode 44. The bus electrode 45 may be formed using a silver paste or the like having excellent conductivity.

The sustain electrode 44 and the bus electrode 45 are buried by the front dielectric layer 46. The protective film layer 47 made of MgO is coated on the surface of the front dielectric layer 46.

An address electrode 420 is formed on an upper surface of the rear substrate 410 disposed to face the front substrate 41. The address electrode 420 is perpendicular to the direction in which the sustain electrode 44 is disposed. The address electrode 420 has a strip shape.

The address electrode 420 is buried by the back dielectric layer 430. The partition wall 440 is formed on the top surface of the back dielectric layer 430. The partition wall 440 is disposed in a direction parallel to the address electrode 420, and is located between the places where the address electrode 420 is disposed to partition the discharge space and prevent cross talk. .

Red, green, and blue phosphor layers 450 are coated on the inner wall of the partition 440 and the surface of the back dielectric layer 430.

According to a feature of the invention, in order to minimize the light loss in the non-discharge region, reflecting means 50 capable of reflecting light generated in the discharge space to the discharge space is provided.

That is, the reflecting means 50 is provided in the non-discharge region formed between the adjacent pair of sustain electrodes 44. The reflecting means 50 prevents ultraviolet rays generated from the discharge space collide with the fluorescent material of the phosphor layer 450 to generate visible light, and the visible light passes through the upper end of the partition wall 440 and leaks out into the non-discharge area. For this reason, it has a shape capable of reflecting visible light into the discharge space.

The reflecting means 50 will be described in more detail in FIG. 5.

5 is a diagram illustrating a state in which the plasma display panel 40 of FIG. 4 is cut.

Here, the same reference numerals as in the above-described drawings indicate the same members having the same function.

Referring to the drawings, the X electrode 42 and the Y electrode 43 are alternately disposed on the lower surface of the front substrate 41. A non-discharge region is formed between the pair of sustain electrodes 44 composed of the X electrodes and the Y electrodes 42 and 43.

Reflecting means 50 is formed in this non-discharge area. The reflecting means 50 protrudes from the lower surface of the front substrate 41 in the direction in which the partition wall 440 is disposed.

The reflecting means 50 is formed so that the cross-sectional area becomes narrower from the surface of the front substrate 41 in contact with the pair of sustain electrodes 44 toward the upper end of the partition wall 440. In addition, the reflecting means 50 is an isosceles triangular cross section so as to achieve a vertex at the center of the upper end of the partition 440.

The shape of the reflecting means 50 is a triangular cross-sectional shape in this embodiment, but is not limited to any structure as long as it can reflect light into the discharge space, such as a protruding semi-circular surface, a pentagonal surface, an inverted trapezoidal surface, and the like. .

The reflecting means 50 is preferably made of a glass material so that it can reflect to increase the focusing rate of light. In addition, the reflecting means 50 may be attached or patterned on the front substrate 41 through a separate processing process, and the front substrate 41 may be integrally formed with the front substrate 41 during manufacturing. It would be advantageous.

In addition, the height of the reflecting means 50 is not greater than the thickness of the front dielectric layer 46. That is, the portion where the reflecting means 50 is formed is buried in the front dielectric layer 46 together with the sustain electrode 44 and the bus electrode 45.

As described above, the reflecting means 50 protrudes toward the upper end of the partition wall 440 in the non-discharge region between the pair of sustain electrodes 44 and is buried by the front dielectric layer 46.

Looking at the operation of the plasma display panel 40 according to an embodiment of the present invention having the above structure as follows.

When a driving voltage is applied between the X electrode 42 and the Y electrode 43, surface discharge occurs in the discharge region on the front dielectric layer 44 and the passivation layer 45 to generate ultraviolet rays.

Since the generated ultraviolet rays are coated on the inner surface of the barrier rib 440 and the surface of the rear dielectric layer 430, colorization is realized as the fluorescent material of the phosphor layer 450 is excited.

That is, the space charges in the discharge space are accelerated by the applied driving voltage, and helium, xenon gas, etc. are added to the discharge space mainly with neon, an inert mixed gas filled with a pressure of about 400 to 500 Torr. It will collide with the phening mixed gas.

Accordingly, 147 nanometers of ultraviolet rays are generated while the inert gas is excited, and the generated ultraviolet rays generate visible light as they collide with the fluorescent material of the phosphor layer 450.

At this time, visible light leaking out of the upper end of the partition wall 440 is reflected by the reflecting means 50 disposed in the non-discharge area between the pair of sustain electrodes 44 as indicated by an arrow, thereby focusing. This can minimize the scattering of light.

6 shows a plasma display panel 60 according to a second embodiment of the present invention.

Referring to the drawings, a plurality of pairs of sustain electrodes 64 formed of strip-shaped X and Y electrodes 62 and 63 are arranged on the lower surface of the front substrate 61. Bus electrodes 65 are formed on the bottom edges of the X and Y electrodes 62 and 63. The sustain electrode 64 and the bus electrode 65 are embedded by the front dielectric layer 66. The passivation layer 67 is coated on the front dielectric layer 66.

A plurality of address electrodes 620 are arranged on an upper surface of the rear substrate 610 disposed to face the front substrate 61 in a direction orthogonal to the sustain electrode 64. The address electrode 620 is buried by the back dielectric layer 630. The partition wall 640 is formed on the rear dielectric layer 630 in a direction parallel to the address electrode 620. The inner surface of the partition 640 is coated with a phosphor layer 650 of red, green, and blue.

Here, a black mattress layer 68 is formed in the non-discharge region between the pair of sustain electrodes 64 to improve the contrast of the panel. The black mattress layer 68 is a black layer formed in the non-discharge region in a direction parallel to the sustain electrode 64.

The lower surface of the black mattress layer 68 is provided with a reflecting means 69 toward the upper end of the partition 640. The reflecting means 69 forms a vertex toward the center of the partition wall 640 from the surface of the black mattress layer 68. In this embodiment, the cross section forms an isosceles triangular plane.

The reflecting means 69 is patterned by coating on the upper surface after forming the black mattress layer 68 using the raw material for the black mattress layer 68, or separately corresponding to the shape of the non-discharge region. It can be machined and attached to the shape to be made. In addition, the black mattress layer 68 may be formed by coating on one surface of the reflective means 69 manufactured separately.

In addition, the reflecting means 69 is embedded in the front dielectric layer 66 together with the black mattress layer 68, the height of which is lower than the thickness of the front dielectric layer 66.

As described above, the black mattress layer 68 is primarily formed in the non-discharge region, thereby improving contrast during discharge, and secondly, as the reflecting means 69 is formed on the lower surface of the black mattress layer 68. The light leaking from the discharge space to the front substrate 61 is reflected back into the discharge space, thereby minimizing light loss due to light scattering.

7 illustrates a plasma display panel 70 according to a third embodiment of the present invention.

Referring to the drawings, the plasma display panel 70 includes a front substrate 71 and a rear substrate 710 disposed to face the front substrate 71.

A strip bus electrode 72 is formed on the bottom surface of the front substrate 71. X electrodes 73 and Y electrodes 74 are connected to both sidewalls of the bus electrode 72. The front dielectric layer 75 is formed on the bottom surface of the front substrate 91 on which the electrodes 72 to 74 are embedded. The protective film layer 76 is entirely coated on the lower surface of the front dielectric layer 75.

The address electrode 720 is formed on the upper surface of the rear substrate 710 so as to be spaced apart by a predetermined interval. The address electrode 720 is disposed in a direction orthogonal to the direction in which the bus electrode 72 is formed. A back dielectric layer 730 is formed on the upper surface of the address electrode 710 to fill it.

On the upper surface of the back dielectric layer 730, a grid-shaped partition wall 740 is formed to partition the discharge space and prevent cross talk. The partition wall 740 includes a first partition wall 750 and a second partition wall 760 integrally extending from the first partition wall 750 to both sidewalls. The bus electrode 72, the X electrode 73, and the Y electrode 74 are located in a discharge space partitioned by the partition wall 740.

Here, a black mattress layer 78 is coated on the non-discharge region between the pair of bus electrodes 2 on which the X electrode 73 and the Y electrode 74 are disposed to face each other, and the black mattress layer 78 On the upper surface of the reflecting means 79 is formed.

As described above, the reflecting means 79 is formed on the lower surface of the black mattress layer 78 to improve the contrast, and the cross-sectional area becomes narrower toward the partition 740 so as to leak from the discharge space into the non-discharge area. It is a shape that can reflect visible light into the discharge space.

As described above, the plasma display panel for reducing the light loss of the present invention forms a reflecting means in the non-discharge area, thereby reflecting light leaking from the discharge space into the non-discharge area again into the discharge space. You can get it.

First, it is possible to minimize the loss of light generated from the discharge space.

Second, as the light loss is minimized, the color purity of red, green, and blue can be increased.

Third, the contrast can be improved by arranging the black mattress layer on the non-protective area and forming the reflecting means on the upper surface.

Fourth, as the reflecting means is arranged in the non-discharge region, it is advantageous for high-definition panel exhaust with natural steps in the non-discharge region.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is an exploded perspective view illustrating a part of a conventional plasma display panel;

2 is a cross-sectional view showing a conventional plasma display panel;

3 is a cross-sectional view showing a discharge state of a conventional plasma display panel;

FIG. 4 is an exploded perspective view illustrating a partial cutting of the plasma display panel according to the first embodiment of the present invention; FIG.

5 is a cross-sectional view illustrating a discharge state of the plasma display panel of FIG. 4;

FIG. 6 is an exploded perspective view illustrating a part of the plasma display panel according to the second embodiment of the present disclosure; FIG.

FIG. 7 is an exploded perspective view illustrating a partially cut-out plasma display panel according to a third exemplary embodiment of the present invention. FIG.

<Brief description of symbols for the main parts of the drawings>

40 ... plasma display panel

41.Front board 42 ... X electrode

43 ... Y electrode 44 ... hold electrode

45 Bus electrode 46 Front dielectric layer

47.Protective layer 50 ... Reflection means

410 back substrate 420 address electrode

430 Back Dielectric Layer 440 Bulkhead

450 ... phosphor layer

Claims (16)

A plurality of substrates facing each other; A plurality of electrodes formed on the substrate to generate a discharge; A dielectric layer filling the electrode; A partition wall formed on an opposite surface of the substrate to partition a discharge space; Red, green, and blue phosphor layers coated on the inner side of the partition wall; And And reflecting means disposed in the non-discharge regions between the discharge spaces and installed to prevent light generated from the discharge spaces from escaping into the non-discharge regions. The method of claim 1, And the reflecting means protrudes from one surface of the substrate toward the upper end of the partition wall so as to reflect light leaking into the non-discharge area into the discharge space. The method of claim 2, And the reflecting means is formed such that the cross-sectional area is narrowed from one surface of the substrate toward the direction in which the partition wall is disposed. The method of claim 2, And the reflecting means is formed to form a vertex at the center of the upper end of the partition wall. The method of claim 1, And said reflecting means is buried by a dielectric layer. The method of claim 1, And the reflecting means is formed integrally with the substrate. The method of claim 1, And said reflecting means is made of a glass material. The method of claim 1, And a black stripe layer formed on the substrate to improve contrast in the non-discharge region, and the reflecting means is formed on one surface of the black stripe layer. Front substrate; A strip-shaped sustain electrode formed on the bottom surface of the front substrate; A bus electrode electrically connected to the sustain electrode; A front dielectric layer filling the sustain electrode and the bus electrode; A rear substrate disposed to face the front substrate; An address electrode formed on an upper surface of the rear substrate; Barrier ribs formed between the front and rear substrates; A phosphor layer of red, green, and blue applied in the discharge space partitioned by the partition wall; And And a reflecting means disposed in the non-discharge area between the pair of sustain electrodes and formed to prevent the light generated from the discharge space from leaking out. The method of claim 9, And the reflecting means protrudes from an inner surface of the front substrate toward an upper end of the partition wall. The method of claim 10, The reflecting means has a plasma display for reducing light loss, characterized in that the cross-sectional area is gradually narrowed toward the upper end of the partition wall from the surface of the front substrate so that light generated from the discharge space can be reflected and focused back into the discharge space. panel. The method of claim 9, And a black stripe layer is formed in the non-discharge region to improve contrast, and reflecting means is provided on the bottom surface of the black stripe layer. Front substrate; A strip-shaped bus electrode formed on the front substrate; A sustain electrode having an X electrode and a Y electrode formed in opposite directions from both sidewalls of the adjacent bus electrode and disposed in a discharge space; A front dielectric layer filling the bus electrode and the sustain electrode; A rear substrate provided to face the front substrate; An address electrode formed on the rear substrate in a direction orthogonal to the bus electrode; A back dielectric layer filling the address electrode; A partition wall disposed between the front and rear substrates in a lattice shape to partition a discharge space; Red, green, and blue phosphor layers applied in the discharge space partitioned by the partition wall; And And a reflecting means disposed in a non-discharge area between a pair of bus electrodes on which a sustain electrode is formed, and formed to prevent light emitted from the discharge space from leaking out. The method of claim 13, And the reflecting means protrudes from the surface of the front substrate toward the upper end of the partition wall. The method of claim 14, And the reflecting means is formed to have a smaller cross-sectional area from the surface of the front substrate toward the partition. The method of claim 13, And a black stripe layer is formed in the non-discharge region to improve contrast, and the reflecting means is formed on a lower surface of the black stripe layer.