KR100790460B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to protect an upper glass from an impact by directly attaching a front filter which is made of a single-layer ITO, on an overall surface of the upper glass. A plasma display panel includes an upper glass(101) and a front filter(150). The front filter is formed on a front surface of the upper glass. The front filter is directly attached to the upper glass by using a single layer ITO(Indium Tin Oxide). A mesh-type pattern is formed on at least one of upper and lower ends of the front filter. A thickness of the front filter is between 0.12 and 10 um. A linewidth of a line to form the mesh-type pattern is between 9 and 30 um. First and second electrodes having two layers with different resistances are formed on a lower surface of the upper glass.

Description

Plasma Display Panel

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

2 is a perspective view showing a second embodiment of the structure of the plasma display panel according to the present invention.

3 is a cross-sectional view schematically illustrating a first embodiment of a top panel structure of a plasma display panel according to the present invention.

4 is a cross-sectional view showing a first embodiment of the electrode arrangement of the plasma display panel according to the present invention.

5 is a cross-sectional view illustrating a first embodiment of a structure in which a front filter is attached to a plasma display panel according to the present invention.

6 is a cross-sectional view illustrating a second embodiment of a structure in which a front filter is attached to a plasma display panel structure according to the present invention.

7 is a perspective view illustrating a front filter of a plasma display panel according to the present invention.

FIG. 8 is a timing diagram illustrating a first embodiment of a method of time-divisionally driving a plasma display panel by dividing one frame into a plurality of subfields.

9 is a timing diagram showing a first embodiment of drive signals for driving a plasma display panel.

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 apparatus in which a single layer front filter is directly formed on a front surface of a top glass of the panel.

In general, a plasma display panel is a device that displays an image including a character or a graphic by applying a predetermined voltage to electrodes installed in a discharge space to generate a discharge, and the plasma generated during gas discharge excites a phosphor. .

In addition, the plasma display panel has a simple structure using plasma light emission, and is widely used as an image display device having a large screen, a high definition, a light weight, and being not restricted by an installation location.

The panel is divided into an upper glass and a lower glass, and a front filter having a plurality of blocking films is formed on a front surface of the upper glass, and a sustain electrode and a scan electrode including a bus electrode and a transparent electrode are formed below the upper glass. Formed.

The plurality of blocking films may include an anti-reflection blocking film to prevent glare, a color die blocking film to adjust near-infrared shielding and color, and an electromagnetic shielding (EMI) shielding film to shield electromagnetic waves.

However, the plasma display panel according to the related art has a front filter formed with a plurality of blocking films attached to the top glass with an adhesive or an adhesive, which is complicated in the manufacturing process, and since there is no tempered glass such as transparent glass, it is easily broken and damaged by external impact. It is a cause of raising the manufacturing cost.

The present invention has been made to improve the above-described problems of the prior art, plasma display directly resistant to the manufacturing process, manufacturing cost and external impact by directly forming the front filter with a transparent material of one layer on the front of the top glass It is about the panel.

Plasma display panel according to the present invention for improving the above problems is a glass top; And a front filter formed on the front surface of the upper glass, wherein the front filter is directly bonded to the upper glass with indium tin oxide (IT) of a single layer. do.

In addition, the plasma display panel according to the present invention comprises a glass top; A front filter formed on the front surface of the upper glass; And a first electrode and a second electrode formed on a lower surface of the upper glass, wherein the first and second electrodes are formed of a transparent electrode and a bus electrode formed of indium tin oxide (ITO). The front filter is directly bonded to the top glass with the same Indium-Tin-Oxide (ITO) as the transparent electrode of one layer.

In addition, the plasma display panel according to the present invention comprises a glass top; A front filter formed on the front surface of the upper glass; And a first electrode and a second electrode formed on the lower surface of the upper plate glass, wherein at least one of the first and second electrodes is formed of a single layer, and an indium of a single layer is formed. It is characterized in that the tin-oxide (Indium-Tin-Oxide; IT) is directly bonded to the top glass.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing an embodiment of a plasma display panel according to the present invention. As shown in FIG. 1, the plasma display panel includes scan electrodes 102, sustain electrodes 103, and sustain electrodes 103 formed on the upper glass 101, and address electrodes 22 formed on the lower glass 110. It includes.

The storage electrode pairs 102 and 103 generally include transparent electrodes 102a and 103a and bus electrodes 102b and 103b formed of Indium-Tin-Oxide (ITO). 103b) may be formed of a metal such as silver (Ag) or chromium (Cr) or a stack of chromium / copper / chromium (Cr / Cu / Cr) or a stack of chromium / aluminum / chromium (Cr / Al / Cr). . The bus electrodes 102b and 103b are formed on the transparent electrodes 102a and 103a to reduce the voltage drop caused by the transparent electrodes 102a and 103a having high resistance.

Light between the scan electrodes 102 and the sustain electrodes 103 between the transparent electrodes 102a and 103a and the bus electrodes 102b and 103b absorbs external light generated from the outside of the upper plate glass 101 to reduce reflection. A black matrix (BM) is arranged that functions to block and to improve the purity and contrast of the top glass 101.

An upper dielectric layer 104 and a passivation layer 105 are stacked on the upper glass 101 on which the scan electrode 102 and the sustain electrode 103 are arranged side by side. Charged particles generated by the discharge are accumulated in the upper dielectric layer 104, and may function to protect the pair of sustain electrodes 102 and 103. The passivation layer 105 protects the upper dielectric layer 104 from sputtering of charged particles generated during gas discharge, and increases emission efficiency of secondary electrons. In addition, magnesium oxide (MgO) may be used as the protective film 105, and Si-MgO added with silicon (Si) may be used. Here, the content of silicon (Si) added to the protective film 14 may be 50PPM to 200PPM based on the weight percent (wt%).

The address electrode 113 is formed in a direction crossing the scan electrode 102 and the sustain electrode 103. In addition, the lower dielectric layer 115 and the partition wall 112 are formed on the lower glass 110 on which the address electrode 113 is formed.

In addition, the phosphor layer 114 is formed on the surfaces of the lower dielectric layer 115 and the partition wall 112. The partition wall 112 represents a stripe type including only the vertical partition wall. However, the partition wall 112 is not limited thereto and is defined on a close type or vertical partition wall in which the discharge cells are closed by the vertical partition wall and the horizontal partition wall. It is also possible to have a structure such as a fish bone (Fish Bone) formed with a protrusion at intervals.

In the first embodiment of the present invention, not only the structure of the partition wall 112 illustrated in FIG. 1, but also the structure of the partition wall 112 having various shapes may be possible. For example, a closed bulkhead structure formed of a vertical bulkhead and a horizontal bulkhead is possible, and a channel usable as an exhaust passage in at least one of a differential bulkhead structure, a vertical bulkhead, or a horizontal bulkhead having different heights of the vertical bulkhead and the horizontal bulkhead. The channel-shaped partition wall structure, the grooved partition wall structure in which a hollow is formed in at least one of the vertical partition wall and the horizontal partition wall may be possible.

Here, in the case of the differential barrier rib structure, the height of the horizontal barrier rib is more preferable, and in the case of the channel barrier rib structure or the groove barrier rib structure, it is preferable that the channel is formed in the horizontal barrier rib or the groove is formed.

On the other hand, in the first embodiment of the present invention is shown and described that each of the R, G and B discharge cells are arranged on the same line, it may be arranged in a different shape. For example, a Delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may be not only rectangular, but also various polygonal shapes such as a pentagon and a hexagon.

In addition, the phosphor layer 114 emits light by ultraviolet rays generated during gas discharge to generate visible light of any one of red (R), green (G), and blue (B). Here, an inert mixed gas such as He + Xe, Ne + Xe, and He + Ne + Xe for discharging is injected into the discharge space provided between the upper / lower glass glasses 101 and 110 and the partition wall 113.

2 is a perspective view showing a second embodiment of the structure of the plasma display panel according to the present invention. The content overlapping with FIG. 1 is omitted.

As shown in FIG. 2, the plasma display panel includes a scan electrode 202, a sustain electrode 203, a sustain electrode 203, and an address electrode 213 formed on the lower glass 210, which are pairs of sustain electrodes formed on the rear surface of the upper glass 200. ).

It is not limited to the plasma display panel structure. For example, a black matrix (BM) that absorbs external light generated from the outside to reduce reflection and a black matrix (BM) that improves the purity and contrast of the upper glass 201 is formed of the upper glass ( 201), the black matrix can be both a separate and integral BM structure.

In addition, the barrier rib structure of the panel illustrated in FIG. 2 represents a stripe type including only the vertical barrier rib 212. However, the barrier rib structure of the panel is not limited thereto, and the discharge cell is closed by the vertical barrier rib and the horizontal barrier rib. (Close Type) or a structure such as a fish bone (Fish Bone) formed with a protrusion at a predetermined interval on the vertical partition wall is also possible.

3 is a cross-sectional view illustrating a first embodiment of the structure of the top panel 200. As shown in FIG. 3, the height of the top dielectric layer 204 from the top substrate 201, that is, the distance between the top glass 201 and the top dielectric layer 204 surface varies depending on where the top dielectric layer 204 is formed. Preferably, the height of the portion formed between the sustain electrodes 202a, 202b, 203a, and 203b of the upper dielectric layer 204 is lower than the height of the portion formed on the sustain electrodes 202a, 202b, 203a, and 203b. It is preferable.

The height of the upper dielectric layer 204 from the upper substrate 201 has a maximum value d1, d3, d3, d7 at the central portion of each of the sustain electrodes 202a, 202b, 203a, and 203b, and the sustain electrodes 202a. It is preferable to have the minimum values d2, d4, d6 at the midpoint portion between the points 202b, 203a, and 203b.

The minimum heights d2, d4, d6 of the upper dielectric layer 204 are preferably 20 to 45 μm, and the maximum heights d1, d3, d5, d7 are preferably 23 to 50 μm. In addition, it is preferable that the maximum heights d1, d3, d5, and d7 of the upper dielectric layer 204 differ from the minimum heights d2, d4, and d6 by 3 to 5 μm. By forming the height of the upper dielectric layer 204 to the same value as above, the discharge start voltage between electrodes can be reduced.

In FIG. 3, one sustain electrode is composed of two electrode lines, but the plasma display panel according to the present invention is not limited thereto, and one sustain electrode may be composed of three or more electrode lines or one electrode line. have.

FIG. 4 illustrates a first embodiment of an electrode arrangement of a plasma display panel, and a plurality of discharge cells constituting the plasma display panel is preferably arranged in a matrix form as shown in FIG. 4. The plurality of discharge cells are provided at the intersections of the scan electrode lines Y1 to Ym, the sustain electrode lines Z1 to Zm, and the address electrode lines X1 to Xn, respectively. The scan electrode lines Y1 to Ym are sequentially driven, and the sustain electrode lines Z1 to Zm are commonly driven. The address electrode lines X1 to Xn are divided into odd-numbered lines and even-numbered lines to drive.

Since the electrode arrangement shown in FIG. 4 is only a first embodiment of the electrode arrangement of the plasma panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 4. For example, a dual scan method in which two scan electrode lines of the scan electrode lines Y1 to Ym are simultaneously driven may be possible.

FIG. 5 is a cross-sectional view showing a first embodiment of an electrode structure in which an electrode filter is bonded to a plasma display panel structure according to the present invention. FIG. As shown in FIG. 5, the upper glass 101, the front filter 150 directly formed on the front surface of the upper glass 101, and the sustain electrode pairs 102 and 103 formed on the lower surface of the upper glass 101 are disposed. Include.

Here, the sustain electrode pairs 102 and 103 generally include transparent electrodes 102a and 103a and bus electrodes 102b and 103b formed of Indium-Tin-Oxide (ITO). Omitted as described.

In addition, the front filter 150 is formed directly on the front surface of the top glass 101, and is formed of Indium-Tin-Oxide (ITO).

In addition, the front filter 150 may form a grid-type mesh pattern for EMI shielding from electromagnetic waves, and the thickness A may be 0.12 μm to 10 μm.

In this case, the front filter 150 has an increased thickness A for efficiency of shielding electromagnetic waves (EMI) generated by discharge.

In addition, although the line widths of the two lines crossing each other in the mesh pattern formed on the front filter 150 may be the same or different, considering the alignment, EMI shielding efficiency, etc., the line widths may be the same. In addition, in order to further improve the EMI shielding efficiency, the line width of the two lines may be 9 μm to 30 μm.

In addition, the pitch in the mesh pattern of the front filter 150 is preferably 250um to 300um. Here, the pitch may be defined as a distance between two lines crossing each other.

Here, the size of the front filter 150 may be formed to be the same or smaller than the top glass 101, and, in addition, the sputter and the front filter 150 may be formed directly on the top glass 101. E-beams and the like are possible.

In addition, the plasma display panel can be formed on the front and rear surfaces of the upper glass 101 in the process of forming the transparent electrodes 102b and 103b during the manufacturing process, thereby simplifying the process, shortening the time, and reducing the manufacturing cost.

FIG. 6 is a cross-sectional view illustrating a second embodiment of an electrode structure in which an electrode filter is bonded to a plasma display panel structure according to the present invention, and FIG. As shown in FIG. 6, the upper glass 201, the front filter 250 directly formed on the front surface of the upper glass 201, and the sustain electrode pairs 202 and 203 formed on the lower surface of the upper glass 201 are respectively provided. Include.

Here, the sustain electrode pairs 202 and 203 include bus electrodes, which are omitted as described with reference to FIG. 1.

In addition, the front filter 250 is formed directly on the front surface of the upper glass 201, and formed of Indium-Tin-Oxide (ITO).

In addition, the front filter 250 may be formed a grid-shaped mesh (mesh) pattern for shielding EMI to shield electromagnetic waves, the thickness (A) is preferably 0.12um to 10um.

Here, the thickness A of the front filter 250 increases the efficiency for shielding the electromagnetic waves (EMI) generated by the discharge.

In addition, the size of the front filter 250 may be formed to be the same as or smaller than the top glass 201, and the sputter and the electron beam in such a manner that the front filter 250 is formed directly on the top glass 201. E-beam) is possible.

7 is a perspective view illustrating a front filter of a plasma display panel according to the present invention.

As illustrated in FIG. 7, the front filters 150 and 250 of the plasma display panner may have a mesh type pattern formed on at least one of an upper end and a lower end.

Here, the mesh type pattern is formed in a lattice shape and may be formed into a film, and serves to shield electromagnetic waves generated by discharge.

FIG. 8 is a timing diagram illustrating a first embodiment of a method for time-division driving by dividing a frame into a plurality of subfields in the plasma display panel according to the present invention having the structure as described above. will be. The unit frame may be divided into a predetermined number, for example, eight subfields SF1, ..., SF8 to realize time division gray scale display. Each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8, and a sustain section S1, ..., S8.

In each address section A1, ..., A8, a display data signal is applied to the address electrode X, and scan pulses corresponding to each scan electrode Y are sequentially applied.

In each of the sustain periods S1, ..., S8, a sustain pulse is alternately applied to the scan electrode Y and the sustain electrode Z to form wall charges in the address periods A1, ..., A8. Sustain discharge occurs in the discharge cells.

The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield in turn has different sustains at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be sustained by addressing the cells during the subfield 1 section, the subfield 3 section, and the subfield 8 section.

The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. That is, in FIG. 12, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. . For example, the plasma display panel may be driven by dividing one frame into eight or more subfields or the like, such as 12 or 16 subfields.

The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to subfield 6 may be increased from 32 to 34.

FIG. 9 is a timing diagram illustrating a first embodiment of driving signals for driving a plasma display panel having the above structure with respect to the divided subfield.

The subfield is a wall formed by a pre-reset section and a pre-reset section for forming positive wall charges on the scan electrodes Y and negative wall charges on the sustain electrodes Z. A reset section for initializing the discharge cells of the entire screen using the charge distribution, an address section for selecting the discharge cells, and a sustain section for maintaining the discharge of the selected discharge cells.

The reset section includes a setup section and a setdown section. In the setup section, rising ramp waveforms (Ramp-up) are simultaneously applied to all scan electrodes to generate fine discharges in all discharge cells. Thus, wall charges are generated. In the set-down period, a falling ramp waveform (Ramp-down) falling at a positive voltage lower than the peak voltage of the rising ramp waveform (Ramp-up) is simultaneously applied to all the scan electrodes (Y), thereby eliminating discharge discharge in all the discharge cells. Generated, thereby eliminating unnecessary charges during wall charges and space charges generated by the setup discharges.

In the address period, a negative scan signal scan is sequentially applied to the scan electrode, and at the same time, a positive data signal data is applied to the address electrode X. The address discharge is generated by the voltage difference between the scan signal and the data signal and the wall voltage generated during the reset period, thereby selecting the cell. On the other hand, a signal for maintaining a sustain voltage Vs is applied to the sustain electrode during the set down period and the address period.

In the sustain period, a sustain pulse is alternately applied to the scan electrode and the sustain electrode to generate sustain discharge in the form of surface discharge between the scan electrode and the sustain electrode.

The driving waveforms shown in FIG. 9 are first embodiments of signals for driving the plasma display panel according to the present invention, and the present invention is not limited by the waveforms shown in FIG. For example, the pre-reset period may be omitted, and an erase signal for erasing wall charge may be applied to the sustain electrode after the sustain discharge is completed. In addition, the single sustain driving may be performed by applying the sustain signal to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

In the plasma display panel according to the present invention configured as described above, the panel is directly bonded to the front surface filter of a single layer made of ITO on the front surface of the top glass to reduce the manufacturing cost of the plasma display panel, It is possible to prevent the top glass from being damaged by the impact and to form a pattern for EMI shielding and additional functions, thereby improving the brightness and efficiency of the plasma display panel.

Claims (8)

Glass tops; A front filter formed on the front surface of the upper glass, The front filter is directly bonded to the top glass with a single layer of indium-tin oxide (ITO), and a mesh type pattern is formed on at least one of the top and bottom of the front filter. Plasma display panel, characterized in that. The method of claim 1, The front filter has a thickness of 0.12um to 10um plasma display panel. delete The method of claim 1, The front filter has a line width of a line forming the mesh type pattern is 9um to 30um, characterized in that the plasma display panel. The method of claim 1, And a first electrode and a second electrode formed on the bottom surface of the upper glass, having two layers having different resistance values. delete delete delete

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