KR100659091B1 - Discharge display apparatus wherein 2 electrodes are formed in partition-wall plate - Google Patents

Abstract

A discharge display device having two electrodes formed in a partition plate is provided to directly emit the visible ray generated by discharge in through-cells, by excluding dielectric layers for electrode lines and forming discharge spaces in the through-cells. In a discharge display device having a discharge display panel(200) and a driving device driving the discharge display panel, the discharge display panel comprises a partition plate(280) provided with through-cells(230) and positioned between first and second substrates(210,220), and address and scan electrode lines(270,260) provided with apertures correspondent to the through-cells and positioned in the partition plate. The driving device divides a unit frame into plural sub fields and executes addressing and sustaining operations in the unit sub field by driving the address and scan electrode lines.

Description

Discharge display apparatus wherein 2 electrodes are formed in partition-wall plate}

1 is an exploded perspective view showing a plasma display panel having a three-electrode surface discharge structure as a conventional discharge display panel.

2 is an exploded perspective view illustrating a plasma display panel having a ring-shaped two-electrode structure included in a discharge display device according to an embodiment of the present invention.

3 is a cross-sectional view taken along line III-III of FIG. 2.

4 is a perspective view illustrating an arrangement structure of the through cells and the electrode lines illustrated in FIGS. 2 and 3.

FIG. 5 is a block diagram illustrating a driving apparatus for driving a plasma display panel of the annular two-electrode structure of FIG. 2.

FIG. 6 is a timing diagram illustrating a method of driving the plasma display panel of the annular two-electrode structure of FIG. 2 in the single frame in FIG.

FIG. 7 is a timing diagram illustrating a method of driving the plasma display panel of the annular two-electrode structure of FIG. 2 in the single subfield of FIG. 6.

<Brief description of symbols for the main parts of the drawings>

200 ... plasma display panel, 210 ... first substrate,

214 bulkhead, 215 shield,

220 ... second substrate, 225 ... first fluorescent layer,

226 ... second fluorescent layer, 260 ... scan electrode lines,

270 ... address electrode lines, 280 ... baffle plate,

270a, 260a ... loop part, 270b, 260b ... connection part,

FR1 ... single frame, SF ... single subfield,

R ... initialization cycle, A ... addressing cycle,

S ... keep it.

The present invention relates to a discharge display device, and more particularly, to a discharge display device including a discharge display panel having a three-electrode structure and a driving device for driving the discharge display panel.

1 shows a plasma display panel 100 of a three-electrode surface discharge structure similar to that described in US Pat. No. 6,903,709, as a typical discharge display panel.

The plasma display panel 100 includes a first substrate 101, common electrode lines 106, scan electrode lines 107, a first dielectric layer 109, a protective film 111, a second substrate 115, Address electrode lines 17, a second dielectric layer 113, a barrier layer 114, and a fluorescent layer 110.

The first dielectric layer 109 covers the common electrode lines 106 and the scan electrode lines 107. The passivation layer 111 covers the first dielectric layer 109. The second substrate 115 is positioned to face the first substrate 101. The address electrode lines 17 are arranged parallel to each other on the second substrate 115. The second dielectric layer 113 covers the address electrode lines 117. The partition layer 114 is formed on the second dielectric layer 113. The fluorescent layer 110 is formed on the top surface of the second dielectric layer 113 and the side surface of the barrier layer 114.

According to the conventional discharge display panel 100 as described above, there were the following problems.

First, visible light emitted from the fluorescent layer 110 includes common electrode lines 106, scan electrode lines 107, and electrode lines 106 and 107 disposed under the first substrate 101. As the substantial portion (approximately 40%) is absorbed by the first dielectric layer 109 and the passivation layer 111 covering the portion, the luminous efficiency is low.

Second, when the conventional discharge display panel 100 displays the same image for a long time, the fluorescent layer 110 is ion sputtered by the charged particles of the discharge gas, thereby resulting in permanent afterimage. Cause.

Third, at the same resolution, the number of electrode lines of the discharge display panel is larger than that of other types of flat panel display panels.

The present invention has been made to solve the above problems, and includes a discharge display panel capable of increasing luminous efficiency and preventing permanent afterimage, and a driving device capable of digitally driving the discharge display panel. The object is to provide a discharge display device.

Another object of the present invention is to provide a discharge display apparatus capable of efficiently reducing the number of electrode lines of a panel.

The discharge display device of the present invention for achieving the above object includes a discharge display panel and a drive device for driving the discharge display panel.

The discharge display panel includes a partition plate, address electrode lines, and scan electrode lines. The partition plate is positioned between the first and second substrates with through cells. The address electrode lines and the scan electrode lines are positioned inside the partition plate with openings corresponding to the through cells.

The driving apparatus divides a single frame into a plurality of subfields and drives the address electrode lines and the scan electrode lines to perform an addressing operation and a sustain operation in a single subfield.

According to the discharge display apparatus of the present invention, since the address electrode lines and the scan electrode lines are located inside the partition plate with openings corresponding to the through cells, the following effects are obtained.

First, no separate dielectric layers are needed for the electrode lines, and since discharge spaces are formed in the through cells, visible light generated by discharge in the through cells is directly emitted. Accordingly, the luminous efficiency can be increased.

Second, as the address electrode lines and the scan electrode lines have openings corresponding to the through cells, an electric field from the electrode lines is concentrated in the center of each of the through cells. Therefore, even if the discharge display panel of the present invention displays the same image for a long time, since the fluorescent layer is not ion sputtered by the charged particles of the discharge gas, permanent afterimage can be prevented.

Third, as the address electrode lines and the scan electrode lines have openings corresponding to the through cells, discharge may occur in all spaces of the through cells. Accordingly, the discharge response speed and the discharge efficiency can be increased.

Fourth, since the electrode lines are not positioned on the first and second substrates through which visible light is transmitted, but are located on side surfaces of the through cells that are discharge spaces, transparent conductors having a high resistance value need to be used as the electrode lines. There is no. Accordingly, since the metal having a low resistance value can be used as the electrode lines, the discharge response speed and the discharge efficiency can be increased.

In addition, the driving device in the discharge display apparatus of the present invention divides a single frame into a plurality of subfields, drives the address electrode lines and the scan electrode lines, and maintains and maintains an addressing operation in a single subfield. Perform the action. Accordingly, since the time division driving of the single frame is possible, the discharge display panel may be digitally driven.

In addition, since the addressing operation and the sustaining operation are performed by driving only the address electrode lines and the scan electrode lines, the number of electrode lines of the discharge display panel can be efficiently reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail.

2 shows a plasma display panel 200 having a ring-shaped two-electrode structure included in a discharge display device according to an embodiment of the present invention. 3 is a cross-sectional view taken along line III-III of FIG. 2. 4 illustrates an arrangement structure of the through cells 230 and the electrode lines 270 and 260 illustrated in FIGS. 2 and 3.

2 to 4, the plasma display panel 200 having the annular two-electrode structure included in the discharge display apparatus according to an embodiment of the present invention may include a first substrate 210, a second substrate 220, and a partition wall. The plate 280, the address electrode lines 270, the scan electrode lines 260, the first fluorescent layer 225, the second fluorescent layer 226, and the passivation layer 215 are included.

The first and second substrates 210 and 220 are made of a material having excellent light transmittance mainly containing glass. The second substrate 220 is positioned to face away from the first substrate 210. Preferably, the first substrate 210 and the second substrate 220 are formed using substantially the same material. In this case, the thermal expansion rate of the first substrate 210 and the thermal expansion rate of the second substrate 220 are the same. There is an advantage to being terminated.

The partition plate 280 includes the through cells 230 and the partition wall 214 and is positioned between the first and second substrates 210 and 220. In the present embodiment, although the through cells 230 having a circular cross section are shown, the through cells 230 having a cross section such as a triangle, a square, a pentagon, or an oval may be formed.

The address electrode lines 270 are positioned in the partition wall 214, which is an interior of the partition plate 280, with openings corresponding to the through cells 230. The address electrode lines 270 extend in a second direction (y direction) crossing the first direction (x direction) in which the scan electrode lines 260 extend. In addition, the address electrode lines 270 are spaced apart from the scan electrode lines 260 in the third direction (z direction) in the partition plate 280. The address electrode lines 270 may include first loop parts 270a surrounding each of the through cells 230, and first loop connection parts 270b connecting the first loop parts 270a.

The scan electrode lines 260 intersect the address electrode lines 270 in the partition wall 214 that is inside the partition plate 280 with openings corresponding to the through cells 230 (x direction). Is located. The scan electrode lines 260 include first loop parts 260a surrounding each of the through cells 230 and first loop connections 260b connecting the first loop parts 260a.

In the first substrate 210, a groove 210a is formed in each of the regions corresponding to the through cells 230, and a first fluorescent layer 225 is formed in the groove 210a. Similarly, in the second substrate 220, a groove 220a is formed in each of the regions corresponding to the through cells 230, and a second fluorescent layer 226 is formed in the groove 220a.

A passivation layer 215 is formed on each sidewall of each of the through cells 230. The passivation layers 215 may prevent the partition wall 214 and the electrode lines 270 and 260 from being damaged by the sputtering of plasma particles, and discharge secondary electrons to lower the discharge start voltage. The passivation layers 215 may be formed by applying magnesium oxide (MgO) to a side surface of the partition wall 214 to a predetermined thickness.

Since the electrode lines 270 and 260 are embedded in the partition wall 214 of the partition plate 280, the partition wall 214 is preferably formed of a dielectric capable of inducing charges to accumulate wall charges.

According to the plasma display panel 200 having the annular two-electrode structure, the barrier electrode 280 has openings corresponding to the through cells 230 through the address electrode lines 270 and the scan electrode lines 260. Since it is located inside of, it has the following effects.

First, since no separate dielectric layers for the electrode lines 270 and 260 are needed, and the discharge spaces are formed in the through cells 230, visible light generated by the discharge in the through cells 230 is directly Is released. Accordingly, the luminous efficiency can be increased.

Second, as the address electrode lines 270 and the scan electrode lines 260 have openings corresponding to the through cells 230, an electric field from the electrode lines 270 and 260 is applied to each of the through cells 230. Is concentrated in the middle of the. Therefore, even if the plasma display panel 200 displays the same image for a long time, since the fluorescent layers 225 and 226 are not ion sputtered by the charged particles of the discharge gas, permanent afterimage may be prevented. Can be.

Third, as the address electrode lines 270 and the scan electrode lines 260 have openings corresponding to the through cells 230, discharge may occur in all spaces of the through cells 230. Accordingly, the discharge response speed and the discharge efficiency can be increased.

Fourth, the electrode lines 270 and 260 are not positioned on the first and second substrates 210 and 220 through which visible light is transmitted, but are located on the side of the through cells 230 that are discharge spaces. As the 270 and 260, a transparent conductor having a large resistance value, for example, indium tin oxide (ITO), does not need to be used. Accordingly, since the metal having a low resistance value can be used as the electrode lines 270 and 260, the discharge response speed and the discharge efficiency can be increased.

Referring to FIG. 5, the driving device for driving the plasma display panel 200 having the annular two-electrode structure of FIG. 2 includes an image processor 66, a controller 62, an address driver 63, and a Y driver 65. It includes.

The image processor 66 converts an external image signal, for example, a video signal S _VID and a digital TV signal S _DTV , into an internal image signal as a digital signal. Here, the internal video signal includes, for example, 8 bits of red (R), green (G), and blue (B) image data, a clock signal, and vertical and horizontal synchronization signals, respectively.

The controller 62 generates data signals S _A and Y control signals S _Y according to an internal image signal from the image processor 66.

The address driver 63 drives the address electrode lines 270 of FIG. 2 according to the data signals S _A from the controller 62. The Y driver 65 drives the scan electrode lines 260 of FIG. 2 according to the control signals S _Y from the controller 62.

Such a driving apparatus divides a single frame into a plurality of subfields, drives address electrode lines 270 of FIG. 2 and scan electrode lines 260 of FIG. And maintain operation.

Accordingly, since time-division driving of a single frame is possible, the plasma display panel 200 of the annular two-electrode structure of FIG. 2 may be digitally driven. In addition, apart from the conventional two-electrode structure, only the address electrode lines 270 and the scan electrode lines 260 are driven to perform the addressing operation and the sustaining operation, so that the number of electrode lines of the discharge display panel 200 is efficient. Can be reduced.

This will be described in more detail with reference to FIGS. 6 and 7.

6 illustrates a method in which the driving device of FIG. 5 drives the plasma display panel 200 of the annular two-electrode structure of FIG. 2 in a single frame FR1. In FIG. 6, reference numerals Y ₁ ,..., Y _n denote scan electrode lines 260 of FIG. 2 that are sequentially scanned.

Referring to FIG. 6, each of all single frames is divided into _eight subfields SF ₁ ,..., SF ₈ to realize time division gray scale display. In addition, each subfield SF ₁ ,..., SF ₈ has an initialization period R ₁ , ..., R ₈ , an addressing period A ₁ , ..., A ₈ , and a sustain period S ₁ , ..., S ₈ ).

The discharge conditions of all through cells become uniform in each initialization period (R ₁ , ..., R ₈ ) while being adapted to the addressing to be performed in the next step.

In each addressing period A ₁ , ..., A ₈ , display data signals are applied to the address electrode lines 270 of FIG. 2 and at the same time each scan electrode line 260: Y ₁ , ... , Y _n ), are sequentially applied. Accordingly, when high level display data signals are applied while the scan pulse is applied, wall charges are formed by addressing discharge in the corresponding through cell, and wall charges are not formed in the through cell.

In each sustain period S ₁ , ..., S ₈ , all scan electrode lines (260: Y ₁ , ..., Y _n in FIG. 2) and all address electrode lines (270 in FIG. 2) The sustain-discharge pulses are alternately applied, causing sustain discharge in through cells (230 in FIG. 2) in which wall charges are formed in the corresponding addressing periods A ₁ ,..., A ₈ . Therefore, the luminance of each of the through cells 230 of the plasma display panel 200 is proportional to the length of the sustain periods S ₁ ,..., S ₈ occupying a single frame FR1. The length of the sustain periods S ₁ ,..., S ₈ occupying a single frame FR1 is 255T (T is a unit time). Therefore, the display may be performed in 256 gray levels, including the case where the display is not displayed once in a single frame FR1.

Here, the time 1T corresponding to 2 ⁰ corresponds to the sustain period S ₁ of the first subfield SF ₁ , and the time 1T corresponds to 2 ¹ to the sustain period S ₂ of the second subfield SF ₂ . In the holding period S ₃ of the third subfield SF ₃ , the time 2T is set to be a time 4T corresponding to 2 ² , and in the holding period S ₄ of the fourth subfield SF ₄ . A time period 8T corresponding to 2 ³ , a time period 16T corresponding to 2 ⁴ , and a sustain period of the sixth subfield SF ₆ are maintained in the sustain period S ₅ of the fifth subfield SF ₅ . S ₆ ) has a time 32T corresponding to 2 ⁵ , a holding period S ₇ of the seventh subfield SF ₇ has a time 64T corresponding to 2 ⁶ , and an eighth subfield SF _8. In the sustain period (S ₈ ) of), time 128T corresponding to 2 ⁷ is set, respectively.

Accordingly, if the subfield to be displayed among the eight subfields SF1 to SF8 is appropriately selected, the time division display of 256 gray levels may be performed including all zero (zero) gray levels that are not displayed in any of the subfields.

FIG. 7 illustrates a method in which the driving device of FIG. 5 drives the plasma display panel 200 of the annular two-electrode structure of FIG. 2 in a single subfield of FIG. 6 (SF: one of SF1 to SF8). In FIG. 7, reference numeral S _{AR1 .. ABm} denotes driving signals applied to each address electrode line (270 of FIG. 2), and S _Y1 ,..., S _Yn denotes each scan electrode line (260 of FIG. 2: FIG. 6 indicate driving signals applied to Y ₁ , ..., Y _n ).

Referring to FIG. 7, at the first time t1 to t2 of the initialization period R of the unit sub-field SF, the voltage applied to the address electrode lines 270 of FIG. 2 is the ground voltage V _G. ) Is continuously raised to the second voltage V _S. Here, the ground voltage V _G is applied to the scan electrode lines 260 of FIG. 2: Y ₁ ,..., Y _n of FIG. 6. Accordingly, a weak discharge occurs in the discharge region between the address electrode lines 270 of FIG. 2 and the scan electrode lines 260 (Y ₁ ,..., Y _n ) while the address electrode lines (270 of FIG. 2) occur. Negative wall charges are formed around.

In the second time t2 to t3 as the wall charge accumulation time, the voltage applied to the scan electrode lines 260: Y ₁ , ..., Y _n is changed from the second voltage V _S to the second voltage V. _S) than to the fourth voltage (V _SET) as the higher first voltage (V _SET + V _S) are continued to rise. Here, the ground voltage V _G is applied to the address electrode lines 270. Accordingly, a weak and sustained discharge occurs in the discharge region between the scan electrode lines 260: Y ₁ ,..., Y _n and the address electrode lines 270. Accordingly, a large amount of negative wall charges are formed around the scan electrode lines 260: Y ₁ , ..., Y _n , and a considerable amount of positive wall charges are formed around the address electrode lines 270. Is formed.

In the third time t3 to t4 as the wall charge distribution time, the voltage applied to the scan electrode lines 260: Y ₁ ,..., Y _n is grounded from the second voltage V _S to the third voltage. It continues to fall down to the voltage V _G. Here, the ground voltage V _G is applied to the address electrode lines 270. Accordingly, the negative wall electric-potential of the scan electrode lines 260: Y ₁ ,..., Y _n is appropriately lowered to the set potential, and the positive potential of the address electrode lines 270 is reduced. The temperature is appropriately lowered to the set potential.

Thereby, the addressing voltage V _A -V _G required for the counter discharge between the selected address electrode lines and the scan electrode line in the following addressing period A is appropriately adjusted.

In the addressing period A that follows, the display data signal is applied to the address electrode lines 270 and biased to the fifth voltage V _SCAN lower than the second voltage V _S. As the scanning pulses of the ground voltage V _G are sequentially applied to Y ₁ ,..., Y _n ), smooth addressing may be performed. The display data signal applied to each address electrode line 270 is applied with the positive addressing voltage V _A when the through cell 230 is selected, and with the ground voltage V _G when the through cell 230 is selected. Accordingly, when the display data signal of the positive addressing voltage V _A is applied while the scan pulse of the ground voltage V _G is applied, wall charges are formed by the addressing discharge in the corresponding through cell 230. In the through cell 230, wall charges are not formed.

In the subsequent sustain period S, sustain pulses of the second voltage V _S are alternately applied to all the scan electrode lines 260: Y ₁ ,... Y _n and the address electrode lines 270. A sustain discharge is caused in the through cells 230 in which wall charges were formed in the corresponding addressing period A. FIG.

Since the time division driving of a single frame is possible as described above, the plasma display panel 200 of the annular two-electrode structure of FIG. 2 may be digitally driven. In addition, since the addressing operation and the sustaining operation are performed by driving only the address electrode lines 270 and the scan electrode lines 260 apart from the conventional three-electrode structure, the number of electrode lines of the discharge display panel 200 is more efficient. Can be reduced.

As described above, according to the discharge display apparatus according to the present invention, since the address electrode lines and the scan electrode lines are located inside the partition plate with openings corresponding to the through cells, the following effects are obtained.

First, no separate dielectric layers are needed for the electrode lines, and since discharge spaces are formed in the through cells, visible light generated directly due to the discharge in the through cells is directly emitted. Accordingly, the luminous efficiency can be increased.

Second, as the address electrode lines and the scan electrode lines have openings corresponding to the through cells, the electric field from the electrode lines is concentrated in the center of each of the through cells. Therefore, even if the discharge display panel according to the present invention displays the same image for a long time, since the fluorescent layer is not ion sputtered by the charged particles of the discharge gas, permanent afterimage can be prevented.

Third, as the address electrode lines and the scan electrode lines have openings corresponding to the through cells, discharge may occur in all spaces of the through cells. Accordingly, the discharge response speed and the discharge efficiency can be increased.

Fourth, since the electrode lines are not positioned on the first and second substrates through which visible light is transmitted, but are located on side surfaces of the through cells which are discharge spaces, transparent conductors having a high resistance value do not need to be used as the electrode lines. Accordingly, since the metal having a low resistance value can be used as the electrode lines, the discharge response speed and the discharge efficiency can be increased.

In addition, the driving apparatus of the discharge display apparatus according to the present invention divides a single frame into a plurality of subfields, drives address electrode lines and scan electrode lines, and performs an addressing operation and a sustain operation in a single subfield. do. Accordingly, since the time division driving of a single frame is possible, the discharge display panel can be driven digitally.

In addition, since the addressing operation and the sustaining operation are performed by driving only the address electrode lines and the scan electrode lines away from the conventional three-electrode structure, the number of electrode lines of the discharge display panel can be efficiently reduced.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (8)

A discharge display apparatus including a discharge display panel and a driving device for driving the discharge display panel, The discharge display panel, A partition plate having through cells and positioned between the first and second substrates; Address electrode lines and scan electrode lines positioned in the partition plate with openings corresponding to the through cells; The drive device, Divide a single frame into a plurality of subfields, And an addressing operation and a sustaining operation in a single subfield by driving the address electrode lines and the scan electrode lines. A discharge display apparatus including a discharge display panel and a driving device for driving the discharge display panel, The discharge display panel, A first substrate; A second substrate positioned to face the first substrate; A partition plate having through cells and positioned between the first and second substrates; Address electrode lines positioned in the partition plate with openings corresponding to the through cells; And Scan electrode lines having openings corresponding to the through cells and positioned in a direction crossing the address electrode lines in the partition plate; The drive device, Divide a single frame into a plurality of subfields, And an addressing operation and a sustaining operation in a single subfield by driving the address electrode lines and the scan electrode lines. The method of claim 2, wherein in at least one of the first and second substrates, And a groove formed in each of the regions corresponding to the through cells, and a fluorescent layer formed in the groove. The method of claim 3, And a passivation layer formed on sidewalls of each of the through cells. The method of claim 2, wherein the drive device, And an initializing operation for setting an initial condition of the addressing operation in the single subfield. The method of claim 5, wherein the drive device, The wall potentials of all through cells are erased by the initialization operation, A wall potential of the selected through cells is formed by the addressing operation, And through-cells having wall potentials caused by the addressing operation to cause sustain discharge by the sustain operation. The method of claim 2, wherein the drive device, And dividing the single frame into the plurality of subfields such that the time of each of the plurality of subfields is proportional to its gray scale weighting value. The method of claim 7, wherein the drive device, And dividing the single frame into the plurality of subfields such that the time of the sustain operation of each of the plurality of subfields is proportional to the gray scale weight value of each of the plurality of subfields.

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