KR100322085B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel (PDP) is disclosed. The disclosed plasma display panel includes a front substrate; A plurality of first electrodes formed on the front substrate in a predetermined pattern; At least one first dielectric layer filling the first electrode and formed on the front substrate; A rear substrate coupled to the front substrate to form a discharge space; A plurality of barrier ribs interposed perpendicularly to the first electrode between the front substrate and the rear substrate; A phosphor layer formed between the partition walls to emit light with a predetermined color; A second electrode and a third electrode formed between the barrier ribs on the rear substrate in a plurality of patterns in a predetermined pattern in parallel with the barrier rib to cause a sustain discharge; And a second dielectric layer formed on the rear substrate by filling the second electrode and the third electrode. According to the present invention, there is an advantage that the panel is easy to manufacture and the brightness and efficiency are improved.

Description

Plasma display panel {Plasma display panel}

The present invention relates to a plasma display panel (PDP), and more particularly to a plasma display panel having a structure of counter discharge.

Plasma display panels are excellent in display performance such as display capacity, brightness, contrast, and viewing angle, and are regarded as flat panel display panels that are close to the performance of cathode ray tubes. The plasma display panel is roughly classified into a direct current plasma display panel and an alternating current plasma display panel according to its operation principle. The DC plasma display panel has a structure in which all electrodes are exposed to a discharge space, and charges are directly transferred between the corresponding electrodes.

In contrast, the AC plasma display panel has a structure in which at least one of the corresponding electrodes is surrounded by a dielectric material, and thus no direct charges are moved between the corresponding electrodes, and the wall-charge electric field is applied. Discharge is performed. The DC plasma display panel may include both a DC driving method in which the polarity of the driving voltage does not change and an AC driving method in which the polarity is changed. However, only the AC driving method is applied to the AC plasma display panel.

In addition, the plasma display panel can be roughly divided into a counter discharge type and a surface discharge type according to the configuration of the electrodes. In the opposite discharge type plasma display panel, an addressing electrode and a scanning electrode are provided to face each unit pixel so that an addressing discharge for selecting and discharging a desired pixel and a sustaining discharge for maintaining the addressing discharge are disposed between the two electrodes. Happens in In a surface discharge plasma display panel, a scanning electrode and a common electrode which face each other of the addressing electrode are provided for each unit pixel, and the addressing discharge occurs between the addressing electrode and the common electrode, and between the scanning electrode and the common electrode. The sustain discharge occurs at.

An example of such a surface discharge plasma display panel will be described with reference to FIG. 1.

As illustrated, the address electrode 11 formed on the rear substrate 10 is formed in a predetermined pattern, and the address electrode 11 is buried in the upper surface of the address electrode 11 and the rear substrate 10 and the first dielectric layer ( 12) is formed. A partition 13 is formed on the first dielectric layer 12 to maintain a discharge distance, and a phosphor layer 17 is formed between the partitions 13. The front substrate 16 is coupled to an upper portion of the rear substrate 10, and a scan electrode 14a and a common electrode 15a orthogonal to the address electrode 11 are formed on the bottom surface of the front substrate 16. The electrodes 14a and 15a are grounded with the metal electrodes 14b and 15b, which are bus electrodes, to cause an initial discharge. The front substrate 16 and the electrodes 14 and 15 formed on the bottom surface thereof are embedded in the second dielectric layer 18.

A protective layer 19 made of MgO is formed on the upper surface of the second dielectric layer 18. The protective layer 19 serves to protect the electrodes 14 and 15 and to help discharge the secondary electrons. A predetermined discharge gas is injected between the front substrate 16 and the rear substrate 10.

As shown in FIG. 2, when a predetermined voltage is applied to each electrode, ions of the discharge gas are accumulated in the first dielectric layer 12, and the address electrode 11 and the common electrode 15a are passed through the ions. Trigger discharge occurs between the charged particles are formed on the lower surface of the second dielectric layer 18 of the front substrate 16. In this state, a predetermined voltage V is applied between the scan electrode 14a and the common electrode 15a in accordance with the image signal to generate sustain discharge in the discharge space S. FIG. At this time, a plasma is formed in the discharge gas, and the phosphor is excited by the ultraviolet radiation to generate light.

However, the conventional plasma display panel operated as described above is driven by three electrodes and is surface discharge type, so that the discharge voltage is high and the circuit element cost is high. In addition, since the aperture ratio is low, the luminance and efficiency are low, and since the scan electrode 14a and the common electrode 15a are transparent electrodes, they are formed of a thin film for manufacturing the transparent electrode, thereby increasing the equipment investment cost. In addition, there are many materials and processes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel having a low discharge voltage, a high aperture ratio, improved luminance and efficiency, and a low manufacturing cost.

1 is a schematic perspective view showing the configuration of a general plasma display panel.

2 is a cross-sectional view shown for explaining the operation of FIG.

3 is a schematic perspective view showing the configuration of a plasma display panel according to the present invention;

4 to 6 are schematic side views illustrating an operating state of the plasma display panel of FIG. 3.

<Description of the symbols for the main parts of the drawings>

31. Back substrate 32. Third electrode

33. Second electrode 34. Second dielectric layer

35. Second protective layer 41. Front substrate

42. First electrode 43. Black stripe layer

44. First dielectric layer 45. Third dielectric layer

46. Bulkhead 47. Phosphor layer

48. First protective layer

Plasma display panel of the present invention for achieving the above object, the front substrate; A plurality of first electrodes formed on the front substrate in a predetermined pattern; At least one first dielectric layer filling the first electrode and formed on the front substrate; A rear substrate coupled to the front substrate to form a discharge space; A plurality of barrier ribs interposed perpendicularly to the first electrode between the front substrate and the rear substrate; A phosphor layer formed between the partition walls to emit light with a predetermined color; A second electrode and a third electrode formed between the barrier ribs on the rear substrate in a plurality of patterns in a predetermined pattern in parallel with the barrier rib to cause a sustain discharge; And a second dielectric layer formed on the rear substrate by filling the second electrode and the third electrode.

In the present invention, a protective layer is formed on the second dielectric layer and the partition wall to protect the electrode formed on the lower side thereof.

In the present invention, a black stripe layer is formed on the front substrate between the first electrodes to prevent mutual interference of light formed from each pixel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view showing the configuration of a plasma display panel according to the present invention.

Referring to the drawings, the plasma display device according to the present invention includes a rear substrate 31 and a front substrate 41 which are disposed to face each other and form a discharge space.

On the front substrate 41, a plurality of first electrodes 42 formed in a plurality of stripes in a pattern (pattern), and the first electrode 42 is buried in the at least one layer formed on the front substrate 41 One dielectric layer 44 is formed. In addition, on the front substrate 41 between the first electrode 42, light interference from each pixel is prevented between one discharge cell and another discharge cell, and high contrast is secured as the panel is enlarged. The black stripe layer 43 is formed for this purpose.

The first electrode 42 and the black stripe layer 43 are buried by the first dielectric layer 44, and are orthogonal to the first electrode 42 to maintain a discharge distance on the first dielectric layer 44. A plurality of partition walls 46 are provided, and a phosphor layer 47 that emits light for each color line of R, G, and B colors is formed between the partition walls 46. Meanwhile, a third dielectric layer 45 is formed between the first dielectric layer 44 and the partition wall 46, and a first protective layer 48 is formed on the partition wall 46. The partition wall 46 is provided on the front substrate 41, but the plasma display panel according to the present invention is not limited thereto and may be formed on the rear substrate 31 to be described later.

In addition, on the rear substrate 31 coupled to the front substrate 41 to form a discharge space, the second and third electrodes are formed in parallel with the partition 46 between the partitions 46 to generate a sustain discharge. 33 and 32 are formed, and the second dielectric layer 34 is formed on the rear substrate 31 by filling the second and third electrodes 33 and 32. A second protective layer 35 is formed on the second dielectric layer 34 to protect the second and third electrodes 33 and 32. The first and second protective layers 48 and 35 are usually made of magnesium oxide (MgO).

As described above, in the plasma display panel according to the present invention, the first, second, and third electrodes 42, 33, and 32 are formed to form three electrodes, and the first electrode 42 is a scan electrode, and the second electrode. Reference numeral 33 is an address electrode, and the third electrode 32 serves as a common electrode. Each of these electrodes is formed of a thick film.

The plasma display panel according to the present invention having the configuration as described above functions as follows. Here, the description of the operation of the general plasma display panel will be omitted, and only the characteristic operation of the present invention will be described.

Unlike the conventional panel shown in FIG. 1, in the plasma display panel of the present invention, only the first electrode 42 serving as the scan electrode is formed on the front substrate 41, and the partition wall 46 is formed on the front substrate 41. It is formed on the top. As described above, the black stripe layer 43 is formed between the first electrodes 42 to increase the contrast of the panel. In addition, the rear substrate 31 is formed such that a second electrode 33 as an address electrode and a third electrode 32 as a common electrode are located side by side between the partition walls 46. In this way, by configuring the first, second, and third electrodes 42, 33, and 32, the adjacent cells and unnecessary capacitance can be reduced. The first and second protective layers 48 and 35 are formed on the partition wall 46 and the second dielectric layer 34, respectively.

And the operation and operation according to the present invention with reference to Figures 4 to 6 showing the discharge operation state in detail.

First, the electrodes 42, 33, and 32 are reset through erase discharge. As shown in FIG. 4, when addressing, a discharge is generated between the first electrode 42 of the front substrate 41 and the address electrode of the back substrate 31 to form the first dielectric layer 44 on the first electrode 42. The positive wall charges are formed in the) to be addressed. 5 and 6, when the first sustain voltage is applied to the first electrode 42 having positive wall charges after being addressed, the third electrode formed on the rear substrate 31 ( 32) and sustain discharge occur. The sustain discharge becomes a counter discharge. Therefore, the discharge voltage is lowered.

In addition, the driving of the first electrode 42 may be divided and driven from left and right, respectively. Accordingly, it is possible to reduce the peak current value by dispersing the discharge current to the left and right. In addition, since the transparent electrode and the bus electrode are provided on the conventional front substrate 41, only the first electrode 42, which is one thick film electrode, can operate, thereby increasing the aperture ratio.

As described above, the plasma display panel according to the present invention has the following effects.

First, there is an advantage that the manufacturing process is simplified by reducing the transparent electrode of the thin film, the equipment investment cost is reduced, the electrode of the present invention is easy to manufacture because it is formed of a thick film.

Second, the driving method using three electrodes (first, second, three electrodes) is used, but the discharge voltage is lowered due to the opposite discharge, and the discharge current is distributed to the left and right to lower the peak current value, thereby reducing the circuit element cost. This reduces the effect.

Third, it is possible to lower the voltage by the opposite discharge rather than the conventional surface discharge, and since only one thick film electrode (first electrode) is formed on the front substrate, the aperture ratio is increased, thereby improving brightness and efficiency.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

Front substrate; A plurality of first electrodes formed on the front substrate in a predetermined pattern; A first dielectric layer filling the first electrode and having at least one layer formed on the front substrate; A rear substrate coupled to the front substrate to form a discharge space; Barrier ribs formed to intersect the first electrode between the front and rear substrates; A red, green, and blue phosphor layer formed inside the partition wall; A second electrode formed on the rear substrate in a direction parallel to the partition wall and addressed with the first electrode; A third electrode formed on the rear substrate in an alternating manner with the second electrode and generating a sustain discharge with the first electrode; And And a second dielectric layer filling the second and third electrodes and formed on the back substrate. The method of claim 1, And a protective layer formed on the second dielectric layer and the partition wall and protecting an electrode formed at a lower side thereof. The method of claim 1, And a black stripe layer formed on the front substrate between the first electrodes to prevent mutual interference of light formed from each pixel.