KR100637532B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel for increasing the color temperature of the screen,

According to the present invention, a plasma display panel includes an address electrode formed on a first substrate, a partition wall disposed in a space between the first substrate and the second substrate to partition discharge cells, and red and green formed in each discharge cell. Or a blue phosphor layer and display electrodes formed on the second substrate in a direction orthogonal to the address electrode. The partition wall includes a black first partition member surrounding the red phosphor layer, a second partition member and a third partition member surrounding the green phosphor layer and the blue phosphor layer, respectively, and having a lower brightness than the first partition member.

Address electrode, dielectric layer, barrier rib, phosphor layer, display electrode, color temperature, sustain electrode, scan electrode

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a partially exploded perspective view of a plasma display panel according to a first embodiment of the present invention.

2 is a partially enlarged cross-sectional view of a plasma display panel according to a first embodiment of the present invention.

3 is a partially exploded perspective view of a plasma display panel according to a second embodiment of the present invention.

4 is a partially enlarged cross-sectional view of a plasma display panel according to a second embodiment of the present invention.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having improved partition walls in order to increase the color temperature of a screen.

In general, a plasma display panel (PDP) is a display device that realizes an image by exciting phosphors by vacuum ultraviolet rays generated by gas discharge in a discharge cell. There are possible advantages. Such PDPs are classified into a direct current type and an alternating current type according to the shape of the driving voltage waveform applied and the structure of the discharge cell. In general, an AC PDP is widely used.

In the conventional AC-type PDP, barrier ribs are formed between the front substrate and the rear substrate to partition the discharge cells, and address electrodes on the rear substrate and scan electrodes along the direction orthogonal to the address electrodes on the front substrate corresponding to each discharge cell. And display electrodes formed of the sustain electrodes. The address electrodes and the display electrodes are covered with respective dielectric layers, and a phosphor layer of red, green, or blue is positioned inside each discharge cell. The discharge cells are filled with discharge gas (mainly Ne-Xe mixed gas).

With the above-described configuration, when an address voltage Va is applied between the address electrode and the scan electrode to select a discharge cell to emit light, and a sustain voltage Vs is applied between the scan electrode and the sustain electrode of the selected discharge cell, Plasma discharge occurs in the discharge cell. Then, vacuum ultraviolet rays are emitted from the excitation atoms of Xe produced during plasma discharge, and the vacuum ultraviolet rays excite the phosphor layer to emit visible light, thereby making a predetermined display.

When the PDP displays an image, the color temperature must be expressed to provide a stable screen to the viewer. High color temperature means that the PDP should look slightly blue overall when displaying white. Accordingly, there is a demand for a method of increasing the color temperature by appropriately controlling the amount of light emitted from the red discharge cells, the green discharge cells, and the blue discharge cells.

Therefore, the present invention is to solve the above problems, an object of the present invention is to provide a plasma display panel that can increase the color temperature of the screen while minimizing the structure change inside the panel.

In order to achieve the above object, the present invention,

A first substrate and a second substrate disposed to face each other, address electrodes formed on the first substrate, a partition wall disposed in a space between the first substrate and the second substrate to partition discharge cells, and formed in each discharge cell A red, green, or blue phosphor layer, and display electrodes formed on the second substrate in a direction orthogonal to the address electrode, and the partition wall includes a black first barrier member and a green phosphor layer surrounding the red phosphor layer. The present invention provides a plasma display panel including a second partition member and a third partition member surrounding the blue phosphor layer and having a lower brightness than the first partition member.

The second partition member and the third partition member may be formed of a white partition layer. In this case, the first and third barrier members are formed at the same height as the second and third barrier members and the side surfaces contact each other, and the second and third barrier members are integrally formed at a portion between the green phosphor layer and the blue phosphor layer. Can be.

The second partition member may be formed of a green partition layer, and the third partition member may be formed of a blue partition layer. In this case, the first to third barrier rib members are formed to have the same height as the adjacent barrier rib members and the side surfaces contact each other.

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

1 is a partially exploded perspective view of a plasma display panel according to a first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the first substrate shown in FIG. 1.

Referring to the drawings, the plasma display panel (PDP) is a rear substrate 2 (hereinafter referred to as 'first substrate') and the front substrate 4 (hereinafter referred to as 'second substrate') a random interval. And are disposed to face each other, and discharge cells 6R, 6G, and 6B are provided in a space between the first and second substrates 2 and 4, and are formed by independent discharge mechanisms of the respective discharge cells 6R, 6G, and 6B. Visible light emission produces an arbitrary color image.

First, address electrodes 8 are formed on the first substrate 2 along one direction (y-axis direction in the drawing) of the first substrate 2, and cover the address electrodes 8 to cover the first substrate 2. The first dielectric layer 10 is formed throughout. The address electrodes 8 are formed in a stripe pattern, for example, and are arranged side by side with a predetermined distance from the neighboring address electrodes 8.

On the first dielectric layer 10, lattice-shaped partition walls 12 are formed along the longitudinal direction of the address electrode 8 and in a direction orthogonal to the address electrode (the x-axis direction in the drawing) to discharge cells 6R, 6G, and 6B. And red, green, or blue phosphor layers 14R, 14G, and 14B are disposed on four sides of the partition wall 12 and the upper surface of the first dielectric layer 10. The shape of the partition wall 12 is not limited to the lattice shape, but may be of a stripe type or a closed structure other than the lattice.

On the inner surface of the second substrate 4 facing the first substrate 2, display electrodes 20 including scan electrodes 16 and sustain electrodes 18 are arranged along a direction orthogonal to the address electrodes 8. The second dielectric layer 22 and the MgO passivation layer 24 are disposed on the entire inner surface of the second substrate 4 while covering the display electrodes 20.

The scan electrode 16 and the sustain electrode 18 each have a pair of bus electrodes 16a and 18a disposed at the outer periphery of each of the discharge cells 6R, 6G and 6B and from the bus electrodes 16a and 18a. It may be formed of the protruding electrodes 16b and 18b extending toward the inside of the discharge cells 6R, 6G and 6B so as to face each other. The protruding electrodes 16b and 18b serve to cause plasma discharge in the discharge cells 6R, 6G, and 6B, and are preferably made of transparent indium tin oxide (ITO), but not necessarily limited thereto. It may be made of the same opaque electrode.

The first substrate 2 and the second substrate 4 are sealed with a discharge gas (mainly a Ne-Xe mixed gas) filled in the discharge cells 6R, 6G, and 6B to form a PDP.

Here, in the PDP according to the present embodiment, as shown in FIGS. 1 and 2, the portion of the partition 12 surrounding the red phosphor layer 14R is formed in the green phosphor layer 14G and the blue phosphor layer to increase the color temperature of the screen. The light emission amount of the red discharge cells 6R is lower than the light emission amounts of the green discharge cells 6G and the blue discharge cells 6B by forming a darker color than the portion of the partition 12 surrounding the 14B.

That is, in this embodiment, the partition wall 12 surrounds the first black member wall member 12a surrounding the red phosphor layer 14R, the green phosphor layer 14G, and the blue phosphor layer 14B, respectively. It consists of the 2nd partition member 12b and the 3rd partition member 12c which have lower brightness than the partition member 12a. The second partition member 12b and the third partition member 12c preferably comprise a white partition layer.

As the first partition member 12a is formed in black, a plasma discharge occurs inside the red discharge cell 6R, and when the vacuum ultraviolet light emits the red phosphor layer 14R to emit red visible light, The first partition member 12a absorbs a part of red visible light to lower the amount of light emitted from the red discharge cell 6R.

In addition, as the second and third barrier rib members 12b and 12c are formed of white, plasma discharge occurs in the green discharge cells 6G and the blue discharge cells 6B, causing the green phosphor layer 14G and the blue phosphor layer ( When green visible light and blue visible light are respectively emitted from 14B), the second and third partition members 12b and 12c reflect the green visible light and the blue visible light toward the second substrate 4, respectively, to discharge the green discharge cells 6G and It serves to increase the amount of light emitted from the blue discharge cell 6B.

As the first partition member 12a lowers the emission amount of the red discharge cells 6R, and the second and third partition member 12b and 12c increase the emission amounts of the green and blue discharge cells 6G and 6B. As a result, the color temperature of the screen may be increased.

The first partition member 12a is preferably formed at the same height on the first dielectric layer 10 as the side surfaces of the second partition member 12b and the third partition member 12c adjacent to each other are in contact with each other. The second and third partition members 12b and 12c positioned between the green discharge cell 6G and the blue discharge cell 6B may be integrated.

3 is a partially exploded perspective view of a PDP according to a second embodiment of the present invention, and FIG. 4 is an enlarged cross-sectional view of the first substrate shown in FIG. 3.

Referring to the drawings, the partition wall 26 in the present embodiment surrounds the black first partition member 26a surrounding the red phosphor layer 14R, the green phosphor layer 14G, and the blue phosphor layer 14B, respectively. It is composed of a second partition member 26b and a third partition member 26c having a lower brightness than the first partition member 26a and having the same color as the phosphor layer of the corresponding discharge cell. That is, the second partition member 26b surrounding the green phosphor layer 14G is made of a green partition layer, and the third partition member 26c surrounding the blue phosphor layer 14B is made of a blue partition layer.

The second partition member 26b and the third partition member 26c reflect the visible light emitted from the phosphor layer of the corresponding discharge cell to the second substrate 4 side as in the case of the white partition layer, and thus emit light of the corresponding discharge cell. In addition to improving the color temperature of the screen by increasing the, and improves the sharpness of the color contributes to a cleaner screen.

The first partition member 26a, the second partition member 26b, and the third partition member 26c are formed to have the same height as the side surfaces of the other partition member which are adjacent to each other, and are perpendicular to the address electrode. It may be formed to have the same width.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to

As described above, the plasma display panel according to the present invention has an advantage of improving the color temperature of the screen by lowering the amount of light emitted from the red discharge cells and increasing the amount of light emitted from the green and blue discharge cells. In addition, when the second and third partition members surrounding the green phosphor layer and the blue phosphor layer are formed in the same color as the phosphor layer of the corresponding discharge cell, the color temperature and the color clarity are increased together.

Claims (7)

A front substrate and a rear substrate disposed opposite to each other, Address electrodes formed on the rear substrate; A partition wall disposed in a space between the front substrate and the rear substrate to partition discharge cells; Red, green or blue phosphor layers formed in the discharge cells, and Display electrodes formed on the front substrate in a direction orthogonal to the address electrode; The partition wall has a color in which the first partition member surrounding the red phosphor layer is formed in black, and the second and third partition members surrounding the green phosphor layer and the blue phosphor layer have lower brightness than the first partition member. The plasma display panel is formed. The method of claim 1, And the second partition member and the third partition member are formed of a white partition layer. The method of claim 2, And the first and second barrier members are formed to have the same height as the side surfaces of the second and third barrier members. The method of claim 2, And the second and third barrier members are integrally formed at a portion between the green phosphor layer and the blue phosphor layer. delete delete delete

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