KR20010001934A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to improve the light emitting efficiency by broadening a coated area of a fluorescent substance without forming a sub-partition wall. CONSTITUTION: A lower electrode(110) is formed on a lower substrate(100). An upper electrode(210) is arranged on an upper substrate(200) and perpendicular to the lower electrode(110). A partition wall(300) is arranged parallel to the lower electrode(110) on the lower substrate(100). The upper and lower substrates are coated with a dielectric layer, respectively. Especially, the dielectric layer of the upper substrate(200) is coated with a protective film made of a magnesia. A side of the partition wall(300) has a concave-convex surface. The partition wall(300) is formed between the lower electrode(110) on the lower substrate(100). Consequently, the coated area of a fluorescent substance is increased due to a convex(310) and concave(320) of the side of the partition wall(300).

Description

Plasma Display Panel

TECHNICAL FIELD The present invention relates to a plasma display panel, and more particularly, to a structure of a partition wall.

Plasma display panels and liquid crystal displays (LCDs) are spotlighted as next generation display devices with the highest practicality among flat panel display devices. In particular, the plasma display panel has a higher luminance and wider viewing angle than a liquid crystal display device, and thus has wide applicability as a large, thin display such as an outdoor advertising tower, a wall display TV, or a theater display. Unlike the CRT CRT, the plasma display panel displays a screen by discharge of each discharge cell.

1 illustrates a cross-sectional structure of a general plasma display panel, in which a pair of upper electrodes 4 are formed on the same surface of the front glass substrate 1, and a dielectric layer is formed on the upper electrodes 4 by a printing method. In addition, an upper structure in which a protective layer is formed on the dielectric layer 2 by a deposition method, and a lower electrode 12 are formed on the rear glass substrate 11, and crosstalk with adjacent cells between the lower electrodes 12 is performed. The barrier rib 6 is formed to prevent the phenomenon, and the lower structure is formed by forming the phosphors 8, 9, and 10 around the barrier rib 6 and the lower electrode 12 to form a space between the upper structure and the lower structure. The inert gas is enclosed in the structure so as to have a discharge region 5.

In such a structure, when a driving voltage is applied between the pair of upper electrodes 4, surface discharge occurs in the discharge regions of the surfaces of the dielectric layer 2 and the protective layer 3, thereby generating ultraviolet rays 7. The ultraviolet rays 7 excite the phosphors 8, 9, and 10, and color display is performed by the emitted phosphors 8, 9, and 10.

That is, while the electrons inside the discharge cell accelerate to the cathode (-) by the applied driving voltage, helium (He) is filled with the inert mixed gas filled with the pressure of about 400 to 500 torr in the discharge cell. As the main component, it collides with a Penning mixed gas to which xenon (Xe), neon (Ne) gas, etc. are added, and the inert gas is excited to generate ultraviolet rays having a wavelength of 147 nm. The ultraviolet light 7 collides with the phosphors 8, 9, and 10 surrounding the lower electrode 12 and the partition wall 6 to emit light in the visible light region.

Therefore, the larger the coating area of the phosphor is, the higher the luminous efficiency of the discharge cell is, and the brightness is improved. The conventional plasma display panel is manufactured such that a separate sub-barrier is formed between each partition as shown in FIG. 2 so as to increase the application area of the phosphor. In the conventional plasma display panel, since the phosphors are formed by the sub-border walls, the phosphors are bent, so that the coating area of the phosphors is widened.

However, since the sub-barrier formed in the conventional plasma display panel must be formed through a separate mask process, there is a problem that the manufacturing process is increased and the manufacturing yield is lowered. If the height of the sub-barrier is not high enough, the phosphor does not have curvature, so that the coating area of the phosphor is not extended, and if the height of the sub-barrier is too high, the discharge space is reduced. Therefore, the conventional plasma display panel may suffer from a process of forming by adjusting the height of the sub-barrier. In addition, when the discharge space of the discharge cell is reduced by the sub-barrier, a problem arises in that the discharge voltage rises and power consumption increases.

The present invention has been made to solve such a problem, and an object thereof is to widen the coating area of a phosphor without forming a sub partition.

1 is a schematic cross-sectional view of a portion of a conventional plasma display panel;

2 is a view schematically illustrating a structure of a conventional plasma display panel in which a sub-barrier is formed in a discharge cell.

3 is a view schematically showing the structure of a plasma display panel of the present invention;

4 is a view schematically illustrating a structure of a plasma display panel of the present invention in which a plurality of protrusions are formed at each intersection of an upper electrode and a partition wall.

5 is a view illustrating a partition of the present invention in which one depression is formed at an intersection of an upper electrode and a partition.

FIG. 6 is a view showing an upper surface of a partition wall installed in the plasma display panel of the present invention; FIG.

Detailed description of the drawings

100: lower substrate 110: lower dielectric layer

120: lower electrode 200: upper substrate

210: upper electrode 211: upper dielectric layer

212: shield 300: bulkhead

310: protrusion 320: depression

The present invention is characterized by widening the coating area of the phosphor by employing a partition wall formed with bend on the side.

3, the lower electrode 110 formed on the lower substrate 100, the upper electrode 210 formed to be orthogonal to the lower electrode 110, and the lower substrate 100 are disposed on the lower substrate 100. It is configured to include a partition wall 300 formed to be parallel to the lower electrode 110 and the irregularities formed on the side.

The lower electrode 110 is formed on the lower substrate 100, and the upper electrode 210 is formed on the upper substrate 200. In this case, the upper electrode 210 is formed to be orthogonal to the stripe shape. The lower substrate 100 and the upper substrate 200 are coated with dielectric layers 110 and 211, respectively. In particular, the dielectric layer 211 of the upper substrate 200 is coated with a magnesium oxide (MgO) protective film 212. Since the lower electrode 110 and the upper electrode 210 are the same as those of the conventional plasma display panel, the present invention will not be described in detail.

The partition 300, which is a main feature of the present invention, has irregularities formed on its side surface. In addition, the barrier rib 300 of the present invention may be formed between the lower electrodes 110 on the lower substrate 100, may be formed to be parallel to the direction in which the lower electrodes 110 are formed, or may be formed in a lattice shape. However, the present invention will be described based on the partition wall formed parallel to the lower electrode.

The unevenness of the partition 300 is composed of a protrusion 310 formed on a side surface of the barrier 300 in a predetermined width and a depression 320 formed between the protrusions 310. In this case, each of the protrusions 310 may be formed at the intersection overlapping with the upper electrode 210 or the intersection overlapping with the black matrix, but may be formed in multiple intersections as shown in FIG. 4. .

In addition, in the partition 300 of the present invention, one protrusion 310 may be formed at an intersection overlapping the upper electrode 210, but as shown in FIG. 5, an intersection overlapping the upper electrode 210 is illustrated. It is also preferable that one recess 320 is formed in the. Of course, the partition wall 300 of the present invention is preferably configured such that a plurality of depressions 320 are formed at each intersection overlapping the upper electrode 210, which is as shown in FIG.

That is, the protrusions 310 formed on the barrier rib 300 of the present invention are formed at predetermined distances, and the depressions 320 are formed between the protrusions 310. 6 is a plan view illustrating a top surface of the partition 300. As a result, the protrusion 310 and the recess 320 increase the area of application of the phosphor applied to the side surface of the barrier 300 to improve the luminous efficiency of the discharge cell.

The protrusion part 310 and the depression part 320 formed on the partition wall 300 of the present invention are not formed by using a separate mask in addition to the partition wall 300, but by modifying the mask of the existing partition wall 300. To be formed. Therefore, since the mask process is not added to form the partition wall 300 of the present invention, there is no significant effect on the manufacturing yield.

In the partition wall 300 provided in the plasma display panel of the present invention, since irregularities are formed on the surface, phosphors are applied along the uneven surface. Therefore, the application area of the phosphor applied to the partition 300 of the present invention is larger than the application area of the phosphor applied to the conventional flat partition 300. As a result, the plasma display panel of the present invention has a larger amount of light emitted by the negative column ultraviolet rays at the time of discharge than the panel in which the phosphor is applied to the partition 300 which is flat.

The present invention has the effect that the area of the phosphor emitting light by negative column ultraviolet rays is wider than the conventional plasma display panel. The reason is that the coating area of the phosphor coated on the partition wall of the present invention is larger than the coating area of the phosphor coated on the conventional partition wall. Therefore, the plasma display panel of the present invention has a wider application area of the phosphor coated on the side surface of the partition wall than the conventional plasma display panel, thereby improving luminous efficiency and increasing luminance.

Claims (6)

In the plasma display panel, A lower electrode formed on a predetermined lower substrate, An upper electrode formed to be orthogonal to the lower electrode on an upper substrate provided to face the lower substrate, A partition wall formed on the lower substrate and having irregularities on a side thereof; and And a phosphor layer formed on irregularities formed on the side surfaces of the partition wall. The method of claim 1, wherein the partition wall A protrusion having a predetermined width at an intersection portion overlapping the upper electrode, and And a depression formed between the protrusions to have a smaller width than the protrusions. The plasma display panel of claim 2, further comprising a black matrix overlapping a protrusion formed in a non-discharge area between the upper electrodes among the protrusions of the partition wall. The method of claim 1, wherein the partition wall A protrusion formed at a predetermined width every predetermined distance, and And a depression formed between the protrusions to have a smaller width than the protrusions. The plasma display panel of claim 1, wherein the partition wall has a stripe shape. The plasma display panel of claim 1, wherein the barrier rib has a lattice shape.