KR100610893B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel. The plasma display panel of the present invention has a plasma having a plurality of address electrodes formed on a rear panel, a dielectric formed on the address electrode, a partition for forming a plurality of discharge space pixels on the dielectric, and a phosphor coated between the partitions. In the display panel, the partition wall has a thickness different for each cell of R, G, and B. According to the present invention, it is possible to prevent the reduction in the number of gray scales represented by R, G, and B, and to increase the color temperature while keeping the discharge voltages of the R, G, and B cells constant.

Plasma Display Panel, Color Temperature, Bulkhead, Gradation, Discharge Voltage

Description

Plasma Display Panel

1 is a perspective view schematically showing the structure of a typical plasma display panel.

2 is a block diagram showing a R, G, B data processing method in the plasma display panel according to the prior art.

3 schematically illustrates an asymmetric cell structure in a plasma display panel according to the prior art.

4 is a diagram showing the structure of a plasma display panel according to a first embodiment of the present invention;

5 is a diagram showing the structure of a plasma display panel according to a second embodiment of the present invention;

6 is a diagram showing the structure of a plasma display panel according to a third embodiment of the present invention;

7 illustrates the structure of a plasma display panel according to a fourth embodiment of the present invention.
<Description of Symbols for Main Parts of Drawings>
10 front panel 11 sustain electrode
11a: transparent electrode 11b: bus electrode
12 dielectric layer 13 protective film
20: rear panel 21: bulkhead
22: address electrode 210: reverse gamma correction unit
220: gain unit 230: halftone correction unit
240: subfield mapping unit 250: data alignment unit
260: APL part

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

In general, a plasma display panel (hereinafter, referred to as a 'PDP') includes a partition wall formed between a front glass and a back glass of soda-lime glass, each unit cell. When an inert gas containing a small amount of xenon (Xe) is discharged by a high frequency voltage, using Ne, Helium, or a mixture of Neon and Helium (Ne + He) as the main discharge gas. In addition, vacuum ultraviolet rays (Vacuum Ultraviolet rays) are generated to emit the phosphor formed between the partition wall to implement the image.

Such a PDP is easy to manufacture due to its simple structure and thin in shape compared to the cathode ray tube (CRT) which has been the mainstream of the conventional display means, and is currently attracting attention as a next generation display device.

1 is a perspective view schematically illustrating a structure of a general plasma display panel. As shown in FIG. 1, the PDP is coupled in parallel with the front panel 10 on which an image is displayed and the rear panel 20 forming the rear surface at minute intervals.

The front panel 10 has a sustain electrode 11 for maintaining light emission of the cell by mutual surface discharge of the Y electrode, which is the scan electrode, and the Z electrode, which is the sustain electrode, in each pixel. The sustain electrode 11 is provided with a transparent electrode 11a formed of a transparent ITO material and a bus electrode 11b made of a metal material to lower the resistance value of the transparent electrode, and are formed in pairs.

The sustain electrode 11 is present in the dielectric layer 12.

The dielectric layer limits discharge current and insulates electrode pairs.

On the lower surface of the dielectric layer 12, a protective layer 13 is formed to protect the dielectric layer from sputtering of ions due to discharge and to deposit magnesium oxide (MgO) for easy generation of secondary electrons.

On the dielectric layer of the rear panel 20, a plurality of discharge spaces, that is, partitions 21 for forming cells are arranged in parallel. The partition wall 21 shown in FIG. 1 is a stripe type. Another type of partition is a well type partition having a horizontal partition and a vertical partition.

Between the partitions 21, R, G, and B fluorescent layers 23 which emit visible light for image display during address discharge are coated.

In the space between the partitions 21, the address discharge is performed by the address electrode 22 of the rear panel 20 intersecting the sustain electrode 11 to generate vacuum ultraviolet rays.

In order to implement an image on a PDP panel having the above structure, a process of processing various data appropriately for a PDP device is required before displaying input R, G, and B data signals on the panel.

2 is a block diagram illustrating an R, G, and B data processing method in a plasma display panel according to the related art.

Since the normal R, G, and B signals are corrected for CRT characteristics and sent to the PDP device, the PDP device other than the CRT converts the input R, G, and B signals into a signal suitable for display on the PDP panel. need. Therefore, the R, G, and B signals input to the PDP apparatus are input to the inverse gamma correction unit 210 in order to convert them into signals suitable for the PDP.

The inverse gamma correction unit 210 gamma-corrects the input R, G, and B signals through pre-stored gamma data, and linearly converts luminance values according to the gray level values of the R, G, and B signals to be suitable for the PDP image implementation. The linearly converted R, G, and B signals are output to the gain unit 220 to adjust the white balance of the output screen.

The gain unit 220 adjusts the gain for each of the R, G, and B signals by multiplying the input R, G, and B signals by a value that can be adjusted by the PDP user or the PDP manufacturer, and adjusts the adjusted R, G, and B signals. In order to finely adjust the luminance value of each signal, the signal is output to the halftone correction unit 230. The gain unit 220 allows a PDP user or a PDP manufacturer to set a desired color temperature.

The halftone corrector 230 finely adjusts luminance values of the R, G, and B signals input through image dithering and error diffusion, and outputs the adjusted R, G, and B signals to the subfield mapping unit 240. do.

The subfield mapping unit 240 maps the R, G, and B signals according to a preset subfield pattern, and outputs the mapped R, G, and B signals to the data alignment unit 250.

The data aligning unit 250 sorts the data for each subfield to output the input R, G, and B signals to the PDP panel so that the actual PDP screen can be displayed.

In addition, since the R, G, and B signals output from the inverse gamma correction unit 210 are data to be displayed on the actual PDP screen, they are subjected to an average picture level (APL) unit 260 for obtaining an average brightness of one frame of the input image. . The R, G, and B signals passing through the APL unit 260 are input to the timing controller unit.

The data gain method, which is a color temperature correction method using the conventional gain unit 220, adjusts the amount of light of R, G, and B to express white by giving gains to R, G, and B data. In this method, since the R, G, and B signals corrected by the inverse gamma correction unit 210 are numerically calculated and amplified using the function values input to the gain unit 220, the input R, G, and B signals are input. Will generate an error component. Since R, G, and B signals having this error component are adjusted by the luminance value in the halftone correction unit 230 and mapped by a subfield pattern preset in the subfield mapping unit 240, the first inverse gamma correction unit 210 is performed. ), The 256 gray levels of the R, G, and B signals inputted in () cannot be sufficiently represented.

This causes noise on the screen and the problem of not being able to display clear images and colors.

3 is a diagram illustrating a method of correcting color temperature by adjusting physical sizes of R, G, and B cells, rather than a data gain method.

This method does not make the R, G, B cells of the panel the same size as shown in the drawing, but can lead to color temperature improvement by configuring unit cells of asymmetric sizes of Blue cells> Red cells> Green cells. This method uses the data gain method because the input R, G, and B signals are not processed to suit the PDP driving arbitrarily by using the function values stored in the circuit. In this case, the decrease in the number of expression gradations does not occur. However, in this method, since the discharge space of the cell is changed by forming a unit cell of asymmetric size, the position of the address electrode for discharging the cell is changed for each R, G, B cell, and thus the dielectric constant of each cell As a result, a problem arises in that the discharge voltages of the R, G, and B cells are different when the PDP is driven.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, while improving the barrier rib structure of the plasma display panel, without reducing the number of gray scales represented by R, G, and B, while maintaining the discharge voltages of the R, G, and B cells constant. An object of the present invention is to provide a plasma display panel capable of improving color temperature.

The plasma display panel of the present invention for achieving the above object is a plurality of address electrodes formed on the rear panel, a dielectric formed on the address electrode, a partition wall for forming a plurality of pixels of the discharge space on the dielectric, and the In the plasma display panel including the phosphor coated between the partitions, the partitions are characterized in that the thickness is formed for each of the R, G, B cells.
According to such a feature, the partition is either a stripe type or a well type.
According to this feature, the phosphors are formed differently in thicknesses of R, G, and B.
According to this feature, the dielectric material is formed differently for each R, G, B thickness.
According to this feature, in the case of the well type barrier ribs, the thickness of the horizontal barrier ribs is formed differently for each of R, G, and B.
According to this feature, in the case of the well type barrier ribs, the vertical barrier ribs have different thicknesses for R, G, and B.
According to this feature, the address electrodes are formed at a constant distance between the electrodes.

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Hereinafter, with reference to the accompanying drawings, a specific embodiment according to the present invention will be described.

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4 is a diagram showing the structure of a plasma display panel according to a first embodiment of the present invention.
FIG. 4 illustrates that the phase of the front panel of the general plasma display panel shown in FIG. 1 is rotated by 90 degrees. As shown in FIG. 4, in the plasma display panel including a partition wall for partitioning discharge cells, the present invention may vary the thickness of the partition wall 21 for each of R, G, and B cells such as W1 and W2. It is characterized by.

In the conventional asymmetric cell structure, since the size of the discharge space of the cell is changed by forming a unit cell having an asymmetrical size, the position of the address electrode for discharging the cell is changed for each R, G, B cell, thereby As the dielectric constant of the cells is changed, there is a problem that the discharge voltages of the R, G, and B cells are different when the plasma display panel is driven.

As shown in FIG. 4, the thickness of the barrier ribs of each of the R, G, and B cells is changed as W1 and W2 while maintaining the total pixel size (W pixel) constant for each pixel as shown in FIG. There is no change in position. Since there is no change in the position of the address electrode, the dielectric constant is kept constant, so that the effect of increasing the color temperature can be obtained without the phenomenon that the discharge voltages of the R, G, and B cells are different from cell to cell.

In addition, by improving the physical partition structure of the panel to increase the color temperature of the R, G, B signal, it is possible to obtain the effect of increasing the color temperature without reducing the number of gray scales represented by the data gain method.

5 to 7 illustrate a partition structure of a plasma display panel according to an exemplary embodiment of the present invention.

As shown in FIG. 5 to FIG. 7, the present invention may modify the rear panel structure having various thicknesses of the R, G, and B cell partition walls in various forms.

5 is a diagram illustrating a plasma display panel having a color temperature correction structure according to a second embodiment of the present invention.

In the case of FIG. 5, the thickness of the phosphors 23b for each of the R, G, and B cells is changed based on the barrier rib structure of FIG. 4, so that the number of gray scales of the R, G, and B expressions is not reduced, and the discharge voltage is kept constant. Color temperature increase effect can be obtained.

6 is a view showing a plasma display panel having a color temperature correction structure according to a third embodiment of the present invention.

In the case of Figure 6, based on the barrier rib structure of Figure 4 by varying the thickness of the dielectric 12b for each of the R, G, B cells, there is no decrease in the number of gray scales represented by R, G, B, while maintaining a constant discharge voltage, Color temperature increase effect can be obtained.

FIG. 7 illustrates a plasma display panel having a color temperature correction structure according to a fourth embodiment of the present invention.

In the case of FIG. 7, the thickness of the phosphor 23b for each of the R, G, and B cells and the thickness of the dielectric 12b are different from each other based on the barrier rib structure of FIG. While maintaining the voltage constant, the effect of increasing the color temperature can be obtained.

4 to 7, the partition walls having different thicknesses may be applied to both the stripe type or the well type.

In the case of the well type barrier rib, the present invention is applied to the horizontal barrier rib of the well type barrier rib so that the thickness of the barrier rib for each of the R, G, and B cells is varied so that the number of gray scales of the R, G, and B expressions is not reduced, and the discharge voltage is kept constant. At the same time, the effect of increasing the color temperature can be obtained.

In addition, it is also applied to the vertical partition walls of the well type partition walls, and the thickness of the partition walls for each of the R, G, and B cells is varied so that there is no reduction in the number of gray scales of the R, G, and B expressions, and a color temperature increase effect can be obtained while maintaining a constant discharge voltage. Can be.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention improves the partition structure of the plasma display panel, prevents the reduction of the number of gray scales of the R, G, and B expressions, and increases the color temperature while keeping the discharge voltages of the R, G, and B cells constant. The effect can be obtained.

Claims (7)

A plasma display panel comprising a plurality of address electrodes formed on a rear panel, a dielectric formed on the address electrode, a partition forming a plurality of discharge space pixels on the dielectric, and a phosphor coated between the partitions. , The partition wall is a plasma display panel, characterized in that the thickness is formed for each cell R, G, B. The method of claim 1, And the barrier rib is any one of a stripe type and a well type. The method of claim 1, The phosphor is plasma display panel, characterized in that the thickness is formed different for each of R, G, B. The method of claim 1, The dielectric layer is plasma display panel, characterized in that formed in different thickness for each of R, G, B. The method of claim 2, In the case of the well-type barrier rib, the horizontal barrier ribs have different thicknesses for R, G, and B, respectively. The method of claim 2, In the case of the well-type barrier rib, the thickness of the vertical barrier rib is different for each of R, G, and B plasma display panels. The method of claim 1, And the address electrode has a constant distance between the electrodes.

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