KR100777726B1 - Method for driving plasma display panel wherein effective resetting is performed - Google Patents

Abstract

The present invention provides a method of driving a discharge display panel in which a unit frame is divided into a plurality of subfields for time division gray scale display, each subfield including an initialization period, an addressing period, and a discharge-hold period. (a) and (b). In step (a), the reference drive power is used in the initialization cycle if the temperature of the discharge display panel is not higher than the reference temperature. In step (b), when the temperature of the discharge display panel is higher than the reference temperature, drive power lower than the reference drive power is used in the initialization cycle, and there is a cycle in which voltage application to the electrode lines of the discharge display panel is stopped in the initialization cycle. As a result, driving power lower than the reference driving power is used.

Description

Method for driving plasma display panel where effective resetting is performed}

1 is an internal perspective view showing the structure of a three-electrode surface discharge plasma display panel as a discharge display panel according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating an example of one display cell of the plasma display panel of FIG. 1.

3 is a block diagram illustrating a driving apparatus of the plasma display panel of FIG. 1.

4 is a timing diagram illustrating a method of driving the plasma display panel of FIG. 1.

5 is a waveform diagram illustrating driving signals selectively applied to each of the subfields of FIG. 4 when the temperature of the plasma display panel of FIG. 1 is not higher than a reference temperature.

FIG. 6 is a cross-sectional view illustrating wall charge distribution of any one display cell at time t ₃ of FIG. 5.

FIG. 7 is a cross-sectional view illustrating a wall charge distribution of one display cell at time t ₄ of FIG. 5.

8 is a cross-sectional view showing the wall charge distribution of any of the display cells at the time point t ₈ in FIG.

FIG. 9 is a cross-sectional view illustrating a wall charge distribution of one display cell at time t ₁₀ of FIG. 5.

FIG. 10 is a waveform diagram illustrating driving signals selectively applied to each of the subfields of FIG. 4 when the temperature of the plasma display panel of FIG. 1 is higher than a reference temperature.

FIG. 11 is an enlarged waveform diagram illustrating a signal applied to Y electrode lines as second display electrode lines in the first initialization type R _A of FIG. 10.

FIG. 12 is an enlarged waveform diagram illustrating signals applied to Y electrode lines as second display electrode lines in the second initialization type R _B of FIG. 10.

FIG. 13 is a diagram illustrating an example in which two initialization types of FIG. 5 and two initialization types of FIG. 10 are applied to each subfield of a unit frame.

<Explanation of symbols for the main parts of the drawings>

1 ... discharge display panel, 10 ... front glass substrate,

11, 15 dielectric layer, 12 protective layer,

13 ... back glass substrate, 14 ... discharge space,

16 fluorescent layers, 17 bulkheads,

X ₁ , ..., Xn ... X electrode line, Y ₁ , ..., Yn ... Y electrode line,

A _R1 , ..., A _Bm ... address electrode line, X _na , Y _na ... transparent electrode line,

X _nb , Y _nb ... metal electrode line, SF ₁ , ... SF ₈ ... subfield,

S _Y ... Y drive control signal, V _G ... ground voltage,

S _X ... X drive control signal,

S _A ... address drive control signal,

62 control unit, 63 address drive unit,

64 ... X drive, 65 ... Y drive,

Image processing section, R ₁ , ..., R ₈ ...

69 ... Temperature sensor, S _T ... Temperature sensing signal.

The present invention relates to a method of driving a discharge display panel, and more particularly, a unit frame is divided into a plurality of subfields for time division gray scale display, and each of the subfields includes an initialization period, an addressing period, and a discharge- A driving method of a discharge display panel including a sustain period.

In the conventional discharge display device, for example, the plasma display device of US Pat. No. 5,541,618, a unit frame is divided into a plurality of subfields for time division gray scale display, and each of the subfields is initialized, addressed, and discharged. Include a maintenance cycle. Each of the subfields has a unique gray scale weight value, and a discharge-hold period is set in proportion to the gray scale weight value.

According to the conventional discharge display apparatus as described above, when the temperature of the discharge display panel rises high, there is a problem in that the initialization operation in each of the subfields is not properly performed. This is because, in the initialization cycle in each of the subfields when the temperature of the discharge display panel rises high, the discharge speed in each cell is increased, resulting in the use of a relatively large driving power. Is because wall charges are formed around the electrode lines.

If the initialization operation in the period having the maximum gray scale weight value is not properly performed as described above, the operation in the subsequent addressing period becomes inaccurate and adversely affects the reproducibility of the image.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of increasing the reproducibility of a displayed image by performing an effective initialization in a method of driving a discharge display panel.

According to an aspect of the present invention, a unit frame is divided into a plurality of subfields for time division gray scale display, and each of the subfields includes an initialization period, an addressing period, and a discharge-hold period. As a driving method, steps (a) and (b) are included. In step (a), if the temperature of the discharge display panel is not higher than the reference temperature, the reference driving power is used in the initialization period. In step (b), when the temperature of the discharge display panel is higher than the reference temperature, the driving power lower than the reference driving power is used in the initialization period, and in the initialization period, application of voltage to the electrode lines of the discharge display panel is performed. Due to the presence of a period of interruption, a drive power lower than the reference drive power is used.

According to the driving method of the discharge display panel of the present invention, even if the temperature of the discharge display panel rises high, the initialization operation in each of the subfields can be properly performed. This is because when the temperature of the discharge display panel rises high, in the initializing period in each of the subfields, the discharge speed in each cell is increased while relatively low driving power is used, so that an appropriate amount of wall charges is used. Because they can be formed around the electrode lines.

Even if the temperature of the discharge display panel rises as described above, the initialization operation in each of the subfields is properly performed, so that the operation in subsequent addressing cycles becomes more accurate. Accordingly, the reproducibility of the image can be increased.

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

1 shows a structure of a plasma display panel 1 of a three-electrode surface discharge method as a discharge display panel according to an embodiment of the present invention. FIG. 2 shows an example of one display cell of the plasma display panel 1 of FIG. 1.

1 and 2, between the front and rear glass substrates 10 and 13 of the three-electrode surface discharge plasma display panel 1 according to an embodiment of the present invention, the address electrode lines A _R1,. ..., A _Bm ), dielectric layers 11 and 15, X electrode lines X ₁ , ..., X _n as first display electrode lines, Y electrode lines as second display electrode lines ( Y ₁ ,..., Y _n ), the phosphor 16, the partition 17, and the magnesium monoxide (MgO) layer 12 as a protective layer are provided.

The address electrode lines A _R1 ,..., A _Bm are formed in a predetermined pattern on the front side of the rear glass substrate 13. The lower dielectric layer 15 is applied to the entire surface in front of the address electrode lines A _R1 ,..., A _Bm . In front of the lower dielectric layer 15, barrier ribs 17 are formed in a direction parallel to the address electrode lines A _R1 ,..., And A _Bm . These partitions 17 function to partition the discharge area of each display cell and prevent optical cross talk between each display cell. The fluorescent layer 16 is applied between the partition walls 17.

X electrode lines X ₁ , ..., X _n as first display electrode lines and Y electrode lines Y ₁ , ..., Y _n as second display electrode lines are address electrode lines. It is formed alternately and side by side at the rear of the front glass substrate 10 in a direction intersecting with (A _R1 ,..., A _Bm ). Each intersection sets a corresponding display cell. Each X electrode line (X ₁ , ..., Xn) and each Y electrode line (Y ₁ , ..., Y _n ) is a transparent electrode line of a transparent conductive material such as indium tin oxide (ITO) or the like (see FIG. 2). X _na , Y _na ) and a metal electrode line (X _nb , Y _nb of FIG. 2) for increasing conductivity are formed. The front dielectric layer 11 is formed by applying the entire surface to the rear of the X electrode lines X ₁ ,..., X _n and the Y electrode lines Y ₁ ,..., Y _n . A protective layer 12 for protecting the panel 1 from a strong electric field, for example, a magnesium monoxide (MgO) layer, is formed by applying the entire surface to the back of the front dielectric layer 11. The plasma forming gas is sealed in the discharge space 14.

In the driving method applied to such a discharge display panel, initializing, addressing, and discharge-sustaining cycles are sequentially performed in the unit subfield. In the initialization cycle, the charge states of all display cells are uniform. In the addressing period, a predetermined wall voltage is generated in the selected display cells. In the discharge-hold period, a predetermined alternating voltage is applied to all the XY electrode line pairs so that the display cells in which the wall voltage is formed in the addressing period cause discharge-maintain discharge. In this discharge-maintenance cycle, plasma is formed in the discharge space 14, that is, the gas layer, of the selected display cells causing the discharge-maintain discharge, and the fluorescent layer 16 is excited by the ultraviolet radiation to generate light.

Referring to FIG. 3, the driving apparatus of the plasma display panel 1 of FIG. 1 includes an image processor 66, a controller 62, an address driver 63, an X driver 64, a Y driver 65, and a temperature. Sensor 69.

The image processing unit 66 converts an external analog image signal into a digital signal to convert an internal image signal, for example, 8 bits of red (R), green (G), and blue (B) image data, a clock signal, vertical and horizontal, respectively. Generate sync signals.

The controller 62 generates driving control signals S _A , S _Y , and S _X according to an internal image signal from the image processor 66 and a panel-temperature sensing signal S _T from the temperature sensor 69. Let's do it. Here, if the temperature of the plasma display panel 1 is not higher than the reference temperature, the controller 62 controls the reference driving power to be used in the initialization period of each of the subfields, and the temperature of the plasma display panel 1 is referred to. If the temperature is higher than the control period, the driving power lower than the reference driving power is used in the initialization cycle.

Accordingly, even if the temperature of the plasma display panel 1 rises high, the initialization operation in each of the subfields can be appropriately performed. This is because in the initialization cycle in each of the subfields when the temperature of the plasma display panel 1 rises high, the discharge speed in each cell is increased while relatively low driving power is used, so that an appropriate amount of This is because wall charges may be formed around the electrode lines. That is, even if the temperature of the plasma display panel 1 rises high, the initialization operation in each of the subfields is properly performed, so that the operation in subsequent addressing periods becomes more accurate. Accordingly, the reproducibility of the image can be increased. Related contents will be described in more detail with reference to FIGS. 4 to 12.

The address driver 63, the drive control signals (S _A, S _Y, S _X) by processing the address signal (S _A) from one to generate a display data signal, and the generated display data signal from the control unit 62 Is applied to the address electrode lines. The X driving unit 64 processes the X driving control signal S _X among the driving control signals S _A , S _Y , and S _X from the control unit 62, and applies the X driving control signal S _X to the X electrode lines. The Y driver 65 processes the Y driving control signal S _Y among the driving control signals S _A , S _Y , and S _X from the controller 62 and applies the Y driving control signal S _Y to the Y electrode lines.

4 illustrates a method of driving the plasma display panel 1 of FIG. 1.

Referring to FIG. 4, each of all unit 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 discharge-hold period. (S ₁ , ..., S ₈ ).

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

In each addressing period A ₁ ,..., And A ₈ , a display data signal is applied to the address electrode lines A _R1 , ..., A _{Bm in} FIG. 1 and at the same time, each Y electrode line Y ₁ ,. ..., Y _n ), the scanning pulses are sequentially applied. Accordingly, when a high level display data signal is applied while the scan pulse is applied, wall charges are formed by addressing discharge in the corresponding discharge cell, and wall charges are not formed in the discharge cell that is not.

In each discharge-hold period S ₁ , ..., S ₈ , all Y electrode lines Y ₁ , ..., Y _n and all X electrode lines X ₁ , ..., X _n The discharge-maintenance pulses are alternately applied to generate the display discharge in the discharge cells in which the wall charges are formed in the corresponding addressing periods A ₁ , ..., A ₈ . Therefore, the brightness of the discharge display panel is proportional to the length of the discharge-hold periods S ₁ ,..., S ₈ occupied in the unit frame. The length of the discharge-hold periods S ₁ , ..., S ₈ occupied in the unit frame is 255T (T is a unit period). Therefore, it can be displayed in 256 gray scales, even if it is not displayed once in a unit frame.

Here, the period 1T corresponding to 2 ⁰ is discharged in the discharge-sustaining period S ₁ of the first subfield SF ₁ , and ₂ is the discharge-holding period S ₂ of the second subfield SF ₂ . the period (2T) equivalent to ^1, the third sub-field (SF ₃₎ discharge of-discharge of the sustain period a period (4T) corresponding to the in ² 2 (S _3), the fourth sub-field (SF ₄₎ - In the sustaining period S ₄ , a period 8T corresponding to 2 ³ is provided, and in the discharge-sustaining period S ₅ of the fifth subfield SF ₅ , a period 16T corresponding to 2 ⁴ is provided, and a sixth sub discharge of the field (SF ₆₎ - sustain period (S _6), the period (32T), which corresponds to ^25, 7 discharge in sub-fields (SF ₇₎ - is equivalent to ²⁶ holding cycle (S ₇₎ The period 64T and the period 128T corresponding to 2 ⁷ are set in the discharge-hold period S ₈ of the eighth subfield SF ₈ , respectively.

Accordingly, if a subfield to be displayed among the eight subfields is appropriately selected, 256 gray levels may be displayed including all zero (zero) grays not displayed in any subfields.

In each initialization period (R ₁ , ..., R ₈ ), if the temperature of the plasma display panel (1 of FIG. 3) is not higher than the reference temperature, the reference driving power is controlled to be used, and the plasma display panel 1 is controlled. If the temperature is higher than the reference temperature, it is controlled so that the driving power lower than the reference driving power is used.

Accordingly, even if the temperature of the plasma display panel 1 rises high, the initialization operation in each of the subfields can be appropriately performed. This is because the subfields SF ₁ when the temperature of the plasma display panel 1 rises high. To SF ₈ ) in each initialization period R ₁ R ₈ ), since the discharge rate in each cell is faster while relatively low drive power is used, an appropriate amount of wall charges can be formed around the electrode lines. That is, even if the temperature of the plasma display panel 1 rises high, the subfields SF ₁ To SF ₈ ), as the initialization operation in each of them is properly performed, the operation in the following addressing periods A ₁ to A ₈ becomes more accurate. Accordingly, the reproducibility of the image can be increased. Related contents will be described in more detail with reference to FIGS. 5 to 12.

FIG. 5 illustrates subfields SF ₁ of FIG. 4 when the temperature of the plasma display panel 1 of FIG. 1 is not higher than a reference temperature. To SF ₈ ) show driving signals to be selectively applied to each. More specifically, when the temperature of the plasma display panel 1 of FIG. 1 is not higher than the reference temperature, the plasma display panel 1 in one subfield SF _A and another subfield SF _B of FIG. 4. Drive signals applied to the electrode lines. Wherein any of the sub-fields (SF _A) addressing period (A) and discharging the-drive waveform of the sustain period (S) are the same as those in the further sub-field (SF _B). In FIG. 5, S _{AR1 .. ABm} denotes a drive signal applied to each address electrode line (A _R1 , A _G1 ,..., A _Gm , A _Bm of FIG. 1), and S _{X1 .. Xn} denotes an X electrode. The driving signal applied to the lines (X ₁ , ... X _{n in} FIG. 1), and S _Y1 , ..., S _Yn are the respective Y electrode lines (Y ₁ , ... Y _{n in} FIG. 1). Indicates a drive signal applied to. FIG. 6 illustrates a wall charge distribution of one display cell at time t ₃ of FIG. 5. FIG. 7 illustrates a wall charge distribution of one display cell at time t ₄ of FIG. 5. Figure 8 shows the wall charge distribution of any of the display cells at the time point t ₈ in FIG. 9 illustrates a wall charge distribution of one display cell at time t ₁₀ of FIG. 5. 6-9, the same reference numerals as those in FIG. 2 indicate the objects of the same function.

In Figure 5, if the through 7, the temperature of the plasma display panel 1 is not higher than the reference temperature, any one of sub-fields (SF _A), the electrode lines of the discharge display panel 1 of Figure 1. In Figure 4 The driving signals applied are as follows.

In the first periods t ₁ to t ₂ of the initialization period R _A of one unit subfield SF _A , first the X electrode lines X ₁ ,..., X as first display electrode lines. _The voltage applied to _n ) is continuously raised from the ground voltage V _G to the second voltage V _S. Here, the ground voltage V _G is applied to the Y electrode lines Y ₁ ,..., Y _n as the second display electrode lines and the address electrode lines A _R1 , ..., A _Bm . do. Accordingly, between the X electrode lines (X ₁ , ..., X _n ) and the Y electrode lines (Y ₁ , ..., Y _n ), and the X electrode lines (X ₁ , ..., X) A weak discharge occurs between _n ) and the address electrode lines A ₁ , ..., A _m , and negative wall charges are formed around the X electrode lines X ₁ , ..., X _n . .

In the second period t ₂ to t ₃ as the first voltage rising period, the voltage applied to the Y electrode lines Y ₁ ,..., Y _n as the second display electrode lines is the second voltage V. FIG. _S ) is continuously raised from the first voltage V _SET + V _S higher by the fifth voltage V _SET than the second voltage V _S. Here, the ground voltage V _G is applied to the X electrode lines X ₁ ,..., X _n and the address electrode lines A _R1 ,..., A _Bm . Accordingly, a weak discharge occurs between the Y electrode lines (Y ₁ ,..., Y _n ) and the X electrode lines (X ₁ ,..., X _n ), while the Y electrode lines (Y ₁ , A weaker discharge occurs between ..., Y _n ) and the address electrode lines A _R1 , ..., A _Bm . Here, Y electrode lines (Y _1, ..., Y _n) and the address electrode lines _{(A R1, ..., A Bm} ) than the discharge electrode line Y between the (Y _1, ..., Y _n) and the X-electrode lines (X _1, ..., X _n) because the discharge is stronger between is, the X electrode lines (X _1, ..., X _n) of negative polarity wall around Because the charges were formed. Accordingly, many negative wall charges are formed around the Y electrode lines (Y ₁ , ..., Y _n ), and positive wall charges are formed around the X electrode lines (X ₁ , ..., X _n ). Are formed, and less positive wall charges are formed around the address electrode lines A _R1 , ..., A _Bm (see FIG. 6).

In the third period t ₃ to t ₄ as the falling period, the Y electrode while the voltage applied to the X electrode lines X ₁ ,..., X _n is maintained at the second voltage V _S. The voltage applied to the lines Y ₁ , ..., Y _n is continuously lowered from the second voltage V _S to the third voltage V _NF lower than the ground voltage V _G. Here, the ground voltage V _G is applied to the address electrode lines A _R1 ,..., A _Bm . Accordingly, due to the weak discharge between the X electrode lines (X ₁ ,..., X _n ) and the Y electrode lines (Y ₁ , ..., Y _n ), the Y electrode lines (Y ₁ ,. Some of the negative wall charges around..., Y _n ) move around the X electrode lines X ₁ ,..., X _n (see FIG. 7). Accordingly, the wall voltage of the X electrode lines X ₁ ,..., And X _n is lower than the wall voltage of the address electrode lines A _R1 , ..., A _Bm and the Y electrode lines. It becomes higher than the wall voltage of (Y ₁ , ..., Y _n ). Accordingly, the addressing voltage V _A -V _{SC _} L required for the counter discharge between the selected address electrode lines and the Y electrode line in the subsequent addressing period A may be lowered. Meanwhile, since the ground voltage V _G is applied to all the address electrode lines A _R1 ,..., And A _Bm , the address electrode lines A _R1 ,..., A _Bm are X electrode lines ( Discharge is performed on X ₁ , ..., X _n ) and Y electrode lines (Y ₁ , ..., Y _n ), and due to the discharge, the address electrode lines (A _R1 , ..., A) _Bm ) the positive wall charges around it disappear (see FIG. 7).

In the addressing period A that follows, the display data signal is applied to the address electrode lines, and the Y electrode lines Y ₁ ,... _{Biased to} the sixth voltage V _{SC_H} lower than the second voltage V _S. , Y _n ), as the scan signals of the seventh voltage V _{SC_L} lower than the ground voltage V _G are sequentially applied, smooth addressing may be performed.

The display data signal applied to each of the address electrode lines A _R1 , ..., A _Bm is applied with the positive addressing voltage V _A when the display cell is selected and the ground voltage V _G when the display cell is not selected. do. 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 display cell. Wall charges do not form. Here, for a more accurate and effective addressing discharge, the second voltage V _S is maintained at the X electrode lines X ₁ , ... X _n .

In the following discharge-sustaining period _S , the discharge of the second voltage V _{S at} all the Y electrode lines Y ₁ , ... Y _n and the X electrode lines X ₁ , ... X _n . -Sustain pulses are applied alternately, producing a discharge for discharge-maintaining in the display cells in which wall charges are formed in the corresponding addressing period (A).

5, 8, and 9, when the temperature of the plasma display panel 1 is not higher than the reference temperature, the electrode of the plasma display panel 1 of FIG. 1 in another subfield SF _B of FIG. 5. The driving signals applied to the lines will be described below.

In the first period t ₅ to t ₆ of the initialization period R _B of the another subfield SF _B , first, the voltage applied to the X electrode lines X ₁ ,..., X _n is It continuously rises from the ground voltage V _G to the second voltage V _S. Here, the ground voltage V _G is applied to the Y electrode lines Y ₁ ,..., Y _n and the address electrode lines A _R1 ..., A _Bm . Accordingly, in the display cells that have performed sustain discharge in the discharge-sustainment period S of the previous subfield, the X electrode lines X ₁ ,..., X _n and the Y electrode lines Y ₁ ,. ..., Y _n ) and the X electrode with a weak discharge occurring between the X electrode lines (X ₁ , ..., X _n ) and the address electrode lines (A ₁ , ..., A _m ) Negative wall charges are formed around the lines X ₁ ,..., X _n .

In the second period t ₆ to t ₇ as the second voltage rising period, the voltage applied to the Y electrode lines Y ₁ ,..., Y _n is continuously raised to the second voltage V _S. . Here, the ground voltage V _G is applied to the X electrode lines X ₁ ,..., X _n and the address electrode lines A _R1 ,..., A _Bm . Accordingly, a large number of negative wall charges are formed around the Y electrode lines Y ₁ ,..., And Y _n of the display cells that have performed the sustain discharge in the discharge-sustainment period S of the previous subfield. Positive wall charges are formed around the electrode lines X ₁ , ..., X _n , and less positive wall charges are formed around the address electrode lines A _R1 , ..., A _Bm ( 8).

In the third period t ₇ to t ₈ as an intermediate period, proper stabilization is achieved as the voltage applied to the Y electrode lines Y ₁ ,..., Y _n is maintained at the second voltage V _S. Can be.

In the fourth period t ₈ to t ₁₀ as the falling period, the Y electrode while the voltage applied to the X electrode lines X ₁ ,..., X _n is maintained at the second voltage V _S. Voltages applied to the lines Y ₁ , ..., Y _n are continuously _dropped from the second voltage V _S to the seventh voltage V _{SC _L} lower than the ground voltage V _G. Here, the ground voltage V _G is applied to the address electrode lines A _R1 ,..., A _Bm . Accordingly, due to the weak discharge between the X electrode lines (X ₁ ,..., X _n ) and the Y electrode lines (Y ₁ , ..., Y _n ), the Y electrode lines (Y ₁ ,. Some of the negative wall charges around..., Y _n ) move around the X electrode lines X ₁ ,..., X _n (see FIG. 9). Accordingly, the wall voltage of the X electrode lines X ₁ , ..., X _n is lower than the wall voltage of the address electrode lines A _R1 , ..., A _Bm and the Y electrode lines It becomes higher than the wall voltage of (Y ₁ , ..., Y _n ). As a result, the addressing voltage V _A -V _G required for the counter discharge between the selected address electrode lines and the Y electrode line in the following addressing period A may be lowered. Meanwhile, since the ground voltage V _G is applied to all the address electrode lines A _R1 ,..., And A _Bm , the address electrode lines A _R1 ,..., A _Bm are X electrode lines ( Discharge is performed on X ₁ , ..., X _n ) and Y electrode lines (Y ₁ , ..., Y _n ), and due to the discharge, the address electrode lines (A _R1 , ..., A) _Bm ) the positive wall charges around it disappear (see FIG. 9).

FIG. 10 illustrates subfields SF ₁ of FIG. 4 when the temperature of the plasma display panel 1 of FIG. 1 is higher than a reference temperature. To SF ₈ ) show driving signals to be selectively applied to each. FIG. 11 is an enlarged view of a signal applied to Y electrode lines Y ₁ ,..., Y _n as second display electrode lines in the first initialization type R _A of FIG. 10. FIG. 12 is an enlarged view of a signal applied to Y electrode lines Y ₁ ,..., Y _n as second display electrode lines in the second initialization type R _B of FIG. 10. In FIG. 10, the same reference numerals as used in FIG. 5 indicate objects of the same function. The periods in which the drive signals of FIG. 10 differ from those of FIG. 5 are in the first voltage rising period t ₂ ˜ t ₃ in the first initialization type R _A and in the second initialization type R _B. It corresponds to the second voltage rising period (t ₂ ~ t ₃ ). Therefore, only the cycles are described as follows.

In the first voltage rising period t ₂ to t _{3 of} the first initialization type R _A , when the temperature of the plasma display panel 1 of FIG. 1 is higher than the reference temperature, the first voltage rising of FIG. 5 is increased. Drive power lower than the reference drive power that was used in the period t ₂ to t ₃ is used. To this end, the voltage applied to the Y electrode lines Y ₁ ,..., Y _n as second display electrode lines is discontinuously increased to the first voltage V _SET + V _S. More specifically, the period in which the application of the driving power, that is, the voltage is stopped (t _2A) t _2B ) (see FIG. 11).

As above, when the temperature of the plasma display panel 1 of FIG. 1 is higher than the reference temperature in the second voltage rising periods t ₂ to t _{3 of} the second initialization type R _B , the second voltage of FIG. Drive power lower than the reference drive power used in the two voltage ramp up periods t ₆ to t ₇ is used. To this end, the voltage applied to the Y electrode lines (Y ₁ ,..., Y _{n in} FIG. 1) as the second display electrode lines is discontinuously increased to the second voltage V _S. More specifically, the period in which the application of the driving power, that is, the voltage is stopped (t _6A) t _6B ) (see FIG. 12).

13 shows an example in which two types of initialization of Figure 5 in each sub-field of a unit frame (R _A, R _B) and two types of initialization of Figure 10 (R _A, R _B) is applied. 5, 10, and 13, the initialization periods R ₁ , R ₅ through R _{5 of the} subfields SF ₁ , SF ₅ through SF ₈ having a relatively long discharge-suspension period S of the previous subfield. In R ₈ , the second initialization type R _B is used, and the initialization periods R ₂ to R of the subfields SF ₂ to SF _{4 in which} the discharge-maintenance period S of the previous subfield is relatively short. _{In 4} ) the first initialization type R _B is used. As such a proper and effective initialization is performed, the contrast performance of the discharge display device can be enhanced, the power consumption can be reduced, and the life can be extended.

As described above, according to the driving method of the discharge display panel according to the present invention, even if the temperature of the discharge display panel rises high, the initialization operation in each of the subfields can be properly performed. This is because in the initialization cycle in each of the subfields when the temperature of the discharge display panel rises high, the discharge speed in each cell is increased while relatively low driving power is used, so that an appropriate amount of wall charges is generated. This is because it can be formed around the electrode lines.

Even if the temperature of the discharge display panel rises as described above, the initialization operation in each of the subfields is properly performed, so that the operation in subsequent addressing cycles becomes more accurate. Accordingly, the reproducibility of the image can be increased.

The present invention is not limited to the above embodiments, but may be modified and improved by those skilled in the art within the spirit and scope of the invention as defined in the claims.

Claims (7)

A method of driving a discharge display panel in which a unit frame is divided into a plurality of subfields for time division gray scale display, and each of the subfields includes an initialization period, an addressing period, and a discharge-hold period. (a) using a reference driving power in the initialization period if the temperature of the discharge display panel is not higher than a reference temperature, and (b) When the temperature of the discharge display panel is higher than the reference temperature, a driving power lower than the reference driving power is used in the initialization period, and a period in which voltage application to the electrode lines of the discharge display panel is stopped in the initialization period. And using lower driving power than the reference driving power. The method of claim 1, The discharge display panel has a front substrate and a rear substrate spaced apart from each other, First display electrode lines and second display electrode lines are alternately and parallel to each other between the substrates, Address electrode lines are formed to cross the first and second display electrode lines; In step (a), the voltage applied to the second display electrode lines continuously rises and then falls continuously, And discharging continuously after the voltage applied to the second display electrode lines discontinuously rises in the step (b). delete The method of claim 2, wherein in step (a), Initialization period of at least one subfield among the plurality of subfields, A first voltage rising period for continuously raising a voltage applied to the second display electrode lines to a first voltage; And The voltage applied to the second display electrode lines is continuously maintained to a third voltage lower than the second voltage while the voltage applied to the first display electrode lines is maintained at a second voltage lower than the first voltage. Includes a descending descent cycle, An initialization period of another subfield among the plurality of subfields is A second voltage rising period for continuously raising the voltages applied to the second display electrode lines to the second voltage; And A falling period for continuously decreasing the voltage applied to the second display electrode lines to a fourth voltage lower than the second voltage while maintaining the voltage applied to the first display electrode lines as the second voltage; Method of driving a discharge display panel comprising a. The method of claim 2, wherein in step (b), Initialization period of at least one subfield among the plurality of subfields, A first voltage rising period for discontinuously raising the voltages applied to the second display electrode lines to a first voltage; And The voltage applied to the second display electrode lines is continuously maintained to a third voltage lower than the second voltage while the voltage applied to the first display electrode lines is maintained at a second voltage lower than the first voltage. Includes a descending descent cycle, An initialization period of another subfield among the plurality of subfields is A second voltage rising period for discontinuously raising the voltages applied to the second display electrode lines to the second voltage; And A discharge cycle including a falling period for continuously decreasing the voltage applied to the second display electrode lines to the fourth voltage while maintaining the voltage applied to the first display electrode lines as the second voltage; Method of driving. delete The method of claim 2, wherein in each of steps (a) and (b), And a voltage applied to the first display electrode lines continuously rises to a second voltage immediately before the voltage applied to the second display electrode lines rises to a first voltage.

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