KR980011611A - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel in which luminance and luminous efficiency of a full screen are improved by generating a main discharge in a horizontal direction in a discharge space of each cell to enlarge a discharge emission area, The luminance and the luminous efficiency of the entire screen are greatly improved and the discharge success probability is increased and the direct excitation of the phosphor layer by the discharge current flowing in the discharge space of each cell is prevented in advance, It is possible to prevent the generation of visible and heat, thereby prolonging the service life.

Description

Plasma display panel

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a detailed structural view of a conventional plasma display panel.

FIG. 2 is a cross-sectional view of one cell of the plasma display panel according to the related art (however, the front glass substrate is rotated by 90 °).

FIG. 3 is a detailed structural view of a plasma display panel according to a first embodiment of the present invention; FIG.

FIG. 4 is a sectional view of one cell of the plasma display panel according to the first embodiment of the present invention; FIG.

FIGS. 5 and 6 are cross-sectional views of one cell of the plasma display panel according to the second embodiment of the present invention. FIG.

FIG. 7 is a cross-sectional view of one cell of a plasma display panel according to a third embodiment of the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

11, 41: front glass substrate 12, 42: rear glass substrate

13, 43: address electrode 14, 44: phosphor layer

15, 45: barrier ribs 16, 46: first sustain electrode

17, 47: second sustain electrodes 18, 22, 32, 49: dielectric constant

(MgO) protective layer 21, 31a, 31b, 49a, 48b: auxiliary storage electrode 19, 23, 33, 50,

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 in which luminance and luminous efficiency of a full screen are improved by causing a main discharge in a horizontal direction in a discharge space of each cell, Since Hyundai is called as an information society, the importance of display devices is increasing with the development and spread of information processing systems, and the kinds are also diversified. CRT (Cathod Ray Tube), which has been used most as a display device from the past, has various problems such as large size, high operating voltage, and display distortion, and is suitable for the recent trend aiming at enlargement of screen and planarization Recently, various flat display devices having a matrix structure have been actively researched and developed.

That is, since the flat display device has a matrix structure, it displays a stable image free from display distortion and color blurring, and has a planar structure. The flat display device has a thin thickness and low operating voltage, It can be applied to a wide range of fields.

On the other hand, the flat panel display device includes various light-emitting or non-light-emitting display devices. Plasma display panels, which are one of the light-emitting display devices, have a long lifetime and can display a high luminance, Speed, fast, unaffected by the earth's magnetic field, thin in thickness, easy to implement a large screen, and is attracting attention as a display device of a flat display device.

The plasma display panel according to the prior art has a front glass substrate 1 as a display surface of an image as shown in FIG. 1 and FIG. 2, a plurality of first and second sustain electrodes 1 and 2 formed on the front glass substrate 1, A dielectric layer 4 formed on the first and second sustain electrode lines, a magnesium oxide (MgO) protective layer 5 formed on the dielectric layer 4, A plurality of address electrode lines 7 formed on opposing surfaces of the rear glass substrate 6 facing the front glass substrate 1; A plurality of barrier ribs 8 formed at predetermined intervals between the front glass substrate 1 and the rear glass substrate 6 to prevent discharge interference between the cells, A discharge gas injected into each of the discharge spaces formed by the plurality of discharge spaces, And a phosphor layer 9 formed on the barrier ribs and the rear glass substrate of the inner surfaces of the respective discharge spaces so as to surround the address electrode lines 7 formed on the rear glass substrate.

The entire screen is divided into cells by the first and second sustain electrode lines and the plurality of address electrode lines 7.

The first and second sustain electrode lines include first and second transparent electrode lines 2a and 3a and first and second bus electrode lines 2b and 3b. When a drive pulse is supplied, (2a, 3a) cause mutual surface discharge in the discharge space to form a large number of wall charges on the surface of the magnesium oxide protective layer (5), thereby lowering the address discharge voltage.

The dielectric layer 4 serves to limit the discharge current of each cell, and the magnesium oxide protective layer 5 is formed by sputtering, which is performed when a surface discharge occurs in a discharge space of each cell, And serves to protect the sustain electrode.

The driving method of the plasma display panel according to the related art is as follows. First, a discharge start pulse is supplied to the first and second sustain electrode lines so that each cell is not influenced by the previous light emission state, wall charges are formed in the discharge space, and a specific pulse is continuously applied to the first and second sustain electrode lines Thereby erasing the unnecessary wall charges. Wall charges remain on the surfaces of the MgO protective layer 5 and the phosphor layer 9 after erasing the unnecessary wall charges, and the wall charges serve to lower the address discharge voltage to be performed thereafter.

Thereafter, the address signals of the corresponding cells are supplied to the plurality of address electrode lines 7 while supplying the scan pulses to the plurality of first and second sustain electrode lines sequentially, and the address signals are supplied to the discharge spaces of the cells, Thereby causing an address discharge to occur.

When an address discharge is generated in the discharge space of any cell, the discharge gas is put into a plasma state, ultraviolet rays are emitted to excite the phosphor layer 8, and visible light generated by the excitation of the phosphor layer 8 When the light is emitted outside the discharge space, the light emission of the arbitrary cell can be recognized from the outside.

However, when the distance between the first and second transparent electrodes formed to lower the address discharge voltage is narrow and a lot of wall charges are formed by the first and second transparent electrodes in the conventional plasma display panel configured as described above, The discharge current path is formed in the vertical direction as shown by the arrows in the figure, so that the excessive discharge current directly excites the phosphor layer, so that the aging of the phosphor layer is promoted and the lifetime is shortened. Moreover, There is a problem that various errors are caused due to heat generation because high heat is generated.

As shown in FIG. 2, since the discharge light emission area of each cell is narrow as shown in FIG. 2, when a low voltage is applied during the address discharge, the discharge success probability is lowered. The luminous efficiency is also lowered.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above problems, and it is an object of the present invention to provide a plasma display panel in which sustaining electrode lines are formed on barrier ribs, And the discharge light emission area is widened to improve the luminance and the luminous efficiency of the entire screen.

In order to achieve the above object, the plasma display panel according to the present invention is characterized in that a main discharge occurs in a horizontal direction in a discharge space of each cell. In addition, the plasma display panel according to the present invention is characterized in that at least one auxiliary sustaining electrode is further formed on the front glass substrate of each cell to increase the discharge light emitting area of the discharge space, thereby increasing the brightness of each cell.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

As shown in FIG. 3 and FIG. 4, the first embodiment of the present invention includes a front glass substrate 11 which is a display surface of an image, a rear glass substrate 11 which faces the front glass substrate 11, A plurality of address electrode lines 13 formed on opposing surfaces of the rear glass substrate 12 to the front glass substrate 11 and a plurality of address electrode lines 13 formed on the address electrode lines 3! A plurality of barrier ribs 15 arranged at predetermined intervals between the front glass substrate 11 and the rear glass substrate 12 to prevent discharge interference between the cells, Discharge electrodes formed on both sides of the barrier ribs 15 and supplied with driving pulses are formed in the discharge spaces formed by the first and second sustain electrode lines 11 and 12 and the plurality of barrier ribs 15, 16, 17) formed on the first and second sustain electrode lines (16, 17) Consists of a dielectric layer 18 and the dielectric layer 17 is formed on the MgO protective layer 19 protects the sustain electrode. And a magnesium oxide protective layer 19 formed as above and formed on the first and second sustain electrodes 16 and 17 of an arbitrary cell to protect the sustain electrode. As shown in FIG. 4, when a scan pulse is supplied to the first and second sustain electrodes 16 and 17 of an arbitrary cell and an address signal of a high level is supplied to the address electrode 14, When a visible ray generated by exciting the phosphor layer 14 is emitted to the outside of the discharge space, the ultraviolet rays are emitted from the outside of the arbitrary cell Light emission can be recognized. That is, in the first embodiment of the present invention, as shown in FIG. 4, since the main discharge occurs in the horizontal direction, the phosphor layer 14 is not directly excited by the discharge current, The discharge light emission area of each cell becomes wider than in the prior art, and the electrode, the dielectric layer, and the protective layer, which interfere with the transmission of the visible light ray, are not formed on the front glass substrate 11 as in the conventional art, , The probability of successful discharge increases.

Second Embodiment

The second embodiment of the present invention is such that at least one auxiliary sustain electrode is added to the structure of the first embodiment of the present invention described above. For example, in the second embodiment of the present invention, as shown in FIG. 5, one auxiliary sustain electrode 11, to which a driving pulse is supplied to a surface of the front glass substrate 11 of each cell facing the rear glass substrate 12, A dielectric layer 22 for limiting a discharge current is formed on the sustain electrode 21 and a magnesium oxide protective film 23 for protecting the auxiliary sustain electrode 21 is formed on the dielectric layer 22 do. When a scan pulse is supplied to the first and second sustain electrodes 16 and 17 and the auxiliary sustain electrode 21 and a high address signal is supplied to the address electrode 13, A discharge is generated in the horizontal direction between the first sustain electrode 16 and the auxiliary sustain electrode 21 and between the second sustain electrode 16 and the auxiliary sustain electrode 21, do.

In the second embodiment of the present invention described above, a discharge occurs in the horizontal direction between the first and second sustain electrodes 16 and 17 and the auxiliary sustain electrode 21, respectively. Therefore, in the first embodiment of the present invention described above The area of the discharge light emission is further widened to further increase the luminance and the luminous efficiency of each cell, thereby lowering the address discharge voltage and realizing the cost reduction of the drive IC (Integrated Circuit) due to the reduction of power consumption.

6, the first and second auxiliary sustaining electrodes 31a and 31b are formed on the front glass substrate 11 opposite to the back glass substrate 12, A dielectric layer 32 for limiting the discharge current is formed on the first and second auxiliary sustaining electrodes 31a and 31b and between the first auxiliary sustaining electrode 16 and the first auxiliary sustaining electrode 31a, Discharge occurs between the first and second auxiliary sustaining electrodes 31a and 13b and between the second auxiliary sustaining electrode 31b and the second sustaining electrode 17 in the horizontal direction, The luminance and the luminous efficiency of each cell can be further increased.

Third Embodiment

As shown in FIG. 7, the third embodiment of the present invention includes a front glass substrate 41, which is a display surface of an image, and a rear glass substrate 41, which is disposed opposite to the front glass substrate 41 at a certain distance A plurality of address electrode lines 43 formed on the rear glass substrate 42 facing the front glass substrate 41 and a plurality of phosphor layers 44 formed on the address electrode lines 43, A plurality of barrier ribs 45 arranged at predetermined intervals between the front glass substrate 41 and the rear glass substrate 42 to prevent discharge interference between the cells, First and second sustaining electrodes 46 and 47 formed on both side surfaces of the barrier ribs 45 and supplied with driving pulses, , The first and second sub-assemblies of the rear glass substrate (7) of the front glass substrate (41) A dielectric layer 49 formed on the first and second auxiliary sustaining electrodes 48a and 48b to limit a discharge current and a second dielectric layer 49 formed on the dielectric layer 49, A second magnesium oxide protective layer 50 formed on the phosphor layer 44 and protecting the phosphor layer 44, a second magnesium oxide protective layer 50 protecting the second auxiliary sustaining electrodes 48a and 48b, . When the first and second sustaining electrodes 46 and 47 of the arbitrary cell have the above structure, the scan pulse is supplied to the first and second auxiliary sustaining electrodes 48a and 48b, The first and second auxiliary sustaining electrodes 48a and 48b and the second auxiliary sustaining electrode 48b and the second sustaining electrode 47 are formed between the first and second sustaining electrodes 47 and between the first and second auxiliary sustaining electrodes 48a and 48b, Discharge occurs in the horizontal direction, and the arbitrary cell emits light. In the third embodiment of the present invention, since the second MgO protective layer 51 is formed on the phosphor layer 44, the aging of the phosphor layer 44 due to the discharge current is prevented, and the secondary electron emission coefficient The luminance of each cell is further increased.

As described above, according to the present invention, the main discharge is generated at a rate of several square in each cell, and the area of the discharge light emission is greatly widened compared to the prior art. Therefore, the luminance and the luminous efficiency of the entire screen are greatly improved, the discharge success probability is increased, The excitation of the phosphor layer due to the flowing discharge current is directly emitted beforehand, so that the aging and heat generation of the phosphor layer are prevented and the lifetime is prolonged.

Claims (3)

A plurality of barrier ribs are formed between a front glass substrate and a rear glass substrate, which are display surfaces of an image, to prevent discharge interference between the cells, and sustain electrodes are formed on both sides of the barrier ribs, A dielectric layer for limiting the discharge current is formed on each of the sustain electrodes, and a protective layer for protecting the sustain electrodes is formed on the dielectric layer. The plasma display panel as claimed in claim 1, wherein at least one auxiliary sustaining electrode to which the driving pulse is supplied is formed on a surface of the front glass substrate facing each of the cells facing the rear glass substrate, Wherein a dielectric layer is formed on the dielectric layer, and a protective layer for protecting the auxiliary sustaining electrode is formed on the dielectric layer. A plasma display panel comprising a plurality of barrier ribs for preventing discharge interference between the cells, the barrier ribs being formed between a rear glass substrate on which a phosphor layer of a front glass substrate is formed, At least one auxiliary sustaining electrode is formed on a surface of the front glass tube of each cell opposed to the rear glass substrate, a dielectric layer for limiting discharge current is formed on each of the auxiliary sustaining electrodes, And a second passivation layer for protecting the phosphor layer is formed on the phosphor layer. The plasma display panel of claim 1, wherein the first passivation layer is formed on the first passivation layer. ※ Note: It is disclosed by the contents of the first application.