WO2009104259A1 - Plasma display device - Google Patents

Abstract

A plasma display device is provided with a plasma display panel (10) comprised of a plurality of separation walls (30) in a space between a front substrate (10) and a rear substrate (20) that are provided opposite to each other; and a red color cell (41), a green color cell (42) and a blue color cell (43) made of a phosphor layer (50) for emitting red color, green color and blue color lights formed in order on respective surfaces of a plurality of discharge cells (40) arranged in divisions defined between the separation walls, wherein the plasma display device is characterized in that the distance between the red color cell separation walls is larger than the distance between the green color cell separation walls and that the distance between the green color cell separation walls is equal to or larger than the distance between the blue color cell separation walls.

Description

Plasma display device

The present invention relates to a plasma display device, and more particularly, to a plasma display panel having red cells, green cells, and blue cells in which phosphor layers that emit red, green, and blue light are sequentially formed on each surface of a plurality of discharge cells. The present invention relates to a plasma display device provided.

Conventionally, it has a front cover plate and a back cover plate, and the front cover plate and the back cover plate are arranged to face each other at a predetermined distance, and a partition wall is installed between the front cover and the back cover. A plasma display panel in which phosphor layers of blue, green and red are sequentially arranged in the partition wall, and a dischargeable gas medium is sealed in a space formed by the front cover plate, the back cover plate and the partition wall. In this plasma display panel, the partition wall spacing of the part where the blue phosphor layer is disposed is wider than the partition wall spacing of the part where the other color phosphor layer is disposed, and is widened in the order of green, red and blue. Is known (see, for example, Patent Document 1).

In general, when light is emitted at equal intervals, the green light emission luminance is the highest, the blue luminance is low, and the color temperature of white display is often lowered. According to the plasma display panel described in 1), it is possible to adjust the white balance by adjusting the distance between the partition walls without decreasing the green light emission luminance, and to improve the white balance without decreasing the luminance.
Japanese Patent Laid-Open No. 11-54047

However, in the configuration described in Patent Document 1 described above, when the emission spectrum of the red phosphor layer is mixed with the emission spectrum of the orange component and the color purity of the red color is reduced, no response is made. I can't.

On the other hand, when the emission spectrum of the orange component is mixed with the emission spectrum of the red phosphor layer, and the red color purity is reduced, the emission spectrum of the orange component is reduced to improve the red color purity. In order to achieve this, it is conceivable to provide an orange cut filter or a Ne cut filter, or to use a phosphor material with high red purity for the phosphor layer.

However, it is possible to improve the color purity of red and improve the color temperature only by taking measures to reduce the orange component, but the brightness and the number of gradations are reduced at that time. Cause problems.

In addition, when the Xe concentration of the discharge gas is increased in order to improve the light emission efficiency, or when the number of sustain pulses per field is increased in order to increase the overall luminance, the red luminance decreases. I know it will happen.

Therefore, the present invention is a state in which the brightness of red is reduced as a result of performing some processing to improve the color purity of red to increase the color gamut, increase the luminous efficiency, or increase the overall brightness. Even if it becomes, it aims at providing this and the plasma display apparatus which does not reduce red brightness | luminance and the number of gradations.

In order to achieve the above object, a plasma display device according to a first invention has a plurality of barrier ribs in a space between opposed front and back substrates, and a plurality of discharge cells partitioned between the barrier ribs. A plasma display device comprising a plasma display panel having a red cell, a green cell and a blue cell in which phosphor layers emitting red, green and blue light are sequentially formed on each surface,
The red cell partition spacing is greater than the green cell spacing, and the green cell spacing is greater than or equal to the blue cell spacing.

As a result, a plasma display device that does not reduce the red luminance or the number of gradations can be obtained.

A second invention is the plasma display device according to the first invention, wherein:
The phosphor layer of the red cell is composed of a phosphor material having a longer emission wavelength than the emission spectrum of a red phosphor using (Y, Gd) BO ₃ : Eu as the phosphor material. To do.

As a result, a plasma display device that improves the purity of red using a phosphor material having a higher purity than the phosphor material of a commonly used red phosphor, and does not decrease the luminance and the number of gradations of red. can do.

A third invention is the plasma display device according to the second invention, wherein
The phosphor layer of the red cell is made of a phosphor material using Y (P, V) O ₄ : Eu.

This makes it possible to use a high-purity red phosphor, reliably improve the red color purity, and maintain the red luminance and the number of gradations.

A fourth invention is the plasma display device according to the second invention, wherein
The green cell barrier rib spacing is equal to the blue cell barrier rib pitch.

This makes it possible to maintain only the red cell barrier rib spacing larger than the discharge cells of other colors without reducing the brightness and the number of gradations.

A fifth invention is the plasma display device according to the second invention, wherein:
The red cell, the green cell, and the blue cell are filled with a discharge gas containing Xe gas, and the mixing ratio of the Xe gas in the discharge gas is 10 to 30%.

Thereby, the concentration of Xe gas can be increased to improve the overall luminance, and the balance between blue luminance and red luminance can be maintained.

6th invention is the plasma display apparatus which concerns on 5th invention,
The green cell partition spacing may be greater than the blue cell partition spacing.

Thereby, even if the ratio of the luminance improvement of blue is higher than that of green due to the increase in the concentration of Xe gas, the luminance balance can be maintained.

7th invention is the plasma display apparatus which concerns on 1st invention,
The difference between the red cell partition spacing and the blue cell partition spacing is characterized in that the ratio has a difference of 5% or more with respect to the red cell partition spacing.

Thereby, while improving the color purity of red, it is possible to ensure the correction effect due to the difference in the partition spacing, and to surely prevent the red luminance and the number of gradations from being lowered.

A plasma display device according to an eighth aspect of the present invention has a plurality of barrier ribs in a space between the front substrate and the rear substrate facing each other, and each surface of a plurality of discharge cells defined between the barrier ribs has red, A plasma display device comprising a plasma display panel having a red cell, a green cell and a blue cell in which phosphor layers emitting green and blue light are sequentially formed,
The red cell partition spacing is larger than the green cell partition spacing, the green cell partition spacing is larger than the blue cell partition spacing,
The red cell, the green cell, and the blue cell are filled with a discharge gas containing Xe gas, and the mixing ratio of the Xe gas in the discharge gas is 10 to 30%.

As a result, the concentration of Xe gas is increased to improve the luminous efficiency, and the property that the luminance is improved in the order of blue cell, green cell, and red cell is corrected by the partition spacing to achieve both high luminous efficiency and good white balance. Can be realized.

A plasma display device according to a ninth aspect of the present invention has a plurality of barrier ribs in the space between the front substrate and the rear substrate facing each other, red on each surface of the plurality of discharge cells partitioned between the barrier ribs, A plasma display device comprising a plasma display panel having a red cell, a green cell and a blue cell in which phosphor layers emitting green and blue light are sequentially formed,
The partition spacing of the red cells is larger than the partition spacing of the green cells, the partition spacing of the green cells is formed equal to the partition spacing of the blue cells,
The front substrate has an orange cut filter for attenuating a component of an orange emission spectrum.

This attenuates the orange component that lowers the red color purity, improves the red color purity, and prevents the red luminance and the number of gradations from decreasing by adjusting the partition spacing.

A plasma display device according to a tenth aspect of the present invention has a plurality of barrier ribs in the space between the front substrate and the rear substrate facing each other, and each surface of the plurality of discharge cells partitioned between the barrier ribs has red, A plasma display device comprising a plasma display panel having a red cell, a green cell and a blue cell in which phosphor layers emitting green and blue light are sequentially formed,
The partition spacing of the red cells is equal to the partition spacing of the green cells, the partition spacing of the green cells is formed larger than the partition spacing of the blue cells,
The number of discharges of the discharge cell is 1000 times or more and 1500 times or less per field.

As a result, the number of discharges is increased to improve the overall brightness of the plasma display panel, and the red cell brightness is increased and the number of gradations is increased by widening the partition spacing of the red cells, rather than the blue cells that are likely to improve the brightness. Image with high brightness and good white balance can be displayed.

According to the present invention, it is possible to improve the red color purity, luminous efficiency or overall luminance of the plasma display panel without reducing the white balance.

2 is a diagram illustrating a partial cross-sectional configuration of a plasma display panel 60 and a partial planar configuration of a discharge cell 40 of the plasma display device according to the first embodiment. FIG. It is a comparison figure of the property of the red fluorescent substance applied to the plasma display apparatus which concerns on a present Example, and a general red fluorescent substance. It is the figure which showed the emission spectrum of fluorescent substance of normal purity, and high purity fluorescent substance. FIG. 3A is a diagram showing an emission spectrum of a phosphor used conventionally. FIG. 3B is a diagram showing an emission spectrum of a high-purity red phosphor. It is a figure for demonstrating the adjustment method at the time of applying a highly purified red fluorescent substance to the fluorescent substance layer 51. FIG. FIG. 4A is a diagram showing an emission spectrum, luminance, and number of gradations (gain) of a normal red phosphor. FIG. 4B is a diagram showing the emission spectrum, luminance, and number of gradations (gain) of the highly saturated red phosphor. FIG. 4C is a diagram illustrating characteristics in a state where adjustment is performed using the signal gain. FIG. 4D is a diagram showing characteristics in a state where adjustment is performed with the rib width (distance between the partition walls). FIG. 4E is a diagram showing the color gamut and white balance. It is the figure which showed the partial cross-section structure and partial plane structure of the plasma display panel 60a of the plasma display apparatus which concerns on Example 2. FIG. It is various state diagrams of the plasma display panel 60a using a normal red phosphor and increasing the mixing ratio of Xe gas in the discharge gas. FIG. 6A is a characteristic diagram of a normal red phosphor. FIG. 6B is a characteristic diagram in a state where the mixing ratio of Xe gas is increased. FIG. 6C is a diagram showing a state in which the luminance imbalance state is adjusted by the signal gain. FIG. 6D is a diagram showing an example in which the state of luminance imbalance is adjusted by the partition wall spacing of the discharge cells 40a. FIG. 6E shows the color gamut and white balance. It is the figure which showed the partial cross-section structure and partial plane structure of the plasma display panel 60b of the plasma display apparatus based on Example 3 to which this invention is applied. It is a characteristic view in the various states of the plasma display apparatus which concerns on Example 3. FIG. FIG. 8A is a characteristic diagram in the case where a normal red phosphor is applied and the mixing ratio of Xe gas is also normal. FIG. 8B is a characteristic diagram in a state where a highly saturated red phosphor is applied to the red phosphor layer 51 and the mixing ratio of Xe gas in the discharge gas is increased. FIG. 8C is a characteristic diagram in a state where luminance imbalance and white balance collapse are adjusted by signal gain. FIG. 8D is a diagram showing each characteristic when the luminance imbalance is adjusted by the partition wall interval of the discharge cell 40a. FIG. 8E shows the color gamut and white balance. It is the figure which showed the partial cross-section structure and partial plane structure of the plasma display panel 10b of the plasma display apparatus which concerns on Example 4. FIG. It is the figure which showed the characteristic in the various states of the plasma display apparatus which concerns on Example 4. FIG. FIG. 10A is a characteristic diagram of a red phosphor in a state where a normal red phosphor is used and an orange cut filter is not used. FIG. 10B is a diagram illustrating each characteristic in a state where the orange cut filter 11 is provided. FIG. 10C is a characteristic diagram showing a state in which the red luminance reduction state is adjusted by the signal gain. FIG. 10D is a characteristic diagram in a state where the plasma display device according to the present embodiment is applied to the luminance imbalance state. FIG. 10E shows the color gamut and white balance. It is the figure which showed the partial cross-section structure and partial plane structure of the plasma display panel 10d of the plasma display apparatus concerning Example 5. FIG. It is a characteristic view of the discharge cell 40d of the plasma display apparatus concerning a present Example. FIG. 12A is a characteristic diagram when the sustain pulse is in a normal state. FIG. 12B is a diagram showing characteristics when the number of sustain pulses is increased. FIG. 12C is a characteristic diagram when correction of the luminance reduction state is performed using the signal gain. FIG. 12D is a characteristic diagram in a state where the plasma display device according to the present embodiment is applied. FIG. 12E shows the color gamut and white balance. It is an example of the whole block diagram of the plasma display apparatus of Example 1 thru | or Example 5. FIG.

Explanation of symbols

10 Front substrate 11 Orange cut filter 20 Rear substrate 30 Bulkheads 40, 40a, 40d Discharge cells 41, 41a, 41d Red cells 42, 42a, 42d Green cells 43, 43a, 43d Blue cells 50, 50a, 50b, 50c, 50d Fluorescence Body layers 51, 51a, 51b, 51c, 51d Red phosphor layer 52 Green phosphor layer 53 Blue phosphor layers 60, 60a, 60b, 60c, 60d Plasma display panel 70 Address driver 80 X sustain driver 90 Y sustain driver 100 Y Scan Driver 110 Control Unit 120 Signal Processing Unit 130 High Voltage Power Supply

In order to describe the present invention in more detail, the best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a partial cross-sectional configuration of a plasma display panel 60 and a partial planar configuration of a discharge cell 40 of a plasma display device according to a first embodiment to which the present invention is applied.

In FIG. 1, the plasma display device according to the first embodiment includes a front substrate 10, a rear substrate 20, barrier ribs 30, discharge cells 40, and a phosphor layer 50.

The front substrate 10 is a substrate constituting the display surface of the plasma display panel 60, and may be composed of, for example, a glass substrate. The back substrate 20 constitutes a non-display surface on the back side of the plasma display panel 60. This may also be formed by a glass substrate, for example. The front substrate 10 and the back substrate 20 are provided to face each other, and form a space in the facing surfaces.

A plurality of partition walls (ribs) 30 are provided between the front substrate 10 and the back substrate 20 facing each other, and a space where the front substrate 10 and the back substrate 20 face each other is partitioned to form a plurality of discharge cells 40. The partition wall 30 may be provided on the back substrate 20 side, for example. A plurality of barrier ribs 30 are provided in parallel, and the interval between the barrier ribs determines the horizontal width of the discharge cell 40. Therefore, the partition wall interval may be called a rib width. The barrier ribs 30 serve as partitions so that the discharge generated in each discharge cell 40 does not affect the adjacent discharge cells 40.

The discharge cells 40 are partitioned by the partition walls 30 and are provided on the plasma display panel 60. The discharge cell 40 has a phosphor layer 50 formed on the surface thereof. The phosphor layer 50 includes a red phosphor layer 51, a green phosphor layer 52, and a blue phosphor layer 53. The phosphor layer 50 is sequentially assigned to each discharge cell 40. The discharge cell 40 in which the red phosphor layer 51 is formed constitutes a red cell 41. Similarly, the discharge cell 40 in which the green phosphor layer 52 is formed has a green cell 42 and a blue phosphor layer 53 formed therein. The discharge cell 40 constitutes a blue cell 43.

The red cell 41, the green cell 42, and the blue cell 43 are filled with a discharge gas, and when a gas discharge is generated, ultraviolet rays are generated, and the phosphor layers 51, 52, 53 of each color are excited by the ultraviolet rays. Light is emitted and color display is performed. The discharge gas is a mixed gas containing Xe (xenon), and the mixing ratio of Xe is normally set to 6 to 8%.

A set of the red cell 41, the green cell 42, and the blue cell 43 constitutes one pixel on the plasma display panel 60, and various gradations are expressed by combinations of light emission of red, green, and blue.

In the plasma display panel 60 of the plasma display apparatus according to the first embodiment, the partition wall spacing of the red cells 41 is wider than the partition wall spacing of the green cells 42 and the partition wall spacing of the blue cells 43. The partition wall spacing of the green cells 42 and the partition wall spacing of the blue cells 43 are configured to be equal. Conventionally, in all of the red cell 41, the green cell 42, and the blue cell 43, the discharge cells 40 are formed with equal barrier rib spacing, or even if the barrier rib spacing is different, It was the form which comprised more widely than two colors. However, in the plasma display apparatus according to the present embodiment, the partition spacing of the red cells 41 is wider than the partition spacing of the other two colors. This is because, in the plasma display device according to the present embodiment, the red phosphor used in the red phosphor layer 51 uses a phosphor capable of emitting high-purity red, and the luminance and the number of gradations are used at that time. In order to eliminate the decrease in the red cell 41, the partition wall spacing of the red cell 41 is made larger than the partition wall spacing of the green cell 42 and the blue cell 43 so that ultraviolet rays generated from the plasma of the red cell 41 are efficiently generated. Is. Thereby, reduction of the brightness | luminance and the number of gradations of the red cell 41 can be prevented. In addition, since ultraviolet rays are generated more efficiently as the discharge space becomes larger, the plasma display device according to the present embodiment uses this property to make the luminance of the red cell 41 higher than the discharge cells 42 and 43 of the other two colors. Has been improved greatly.

The difference between the partition wall spacing of the red cell 41 and the partition wall spacing between the green cell 42 and the blue cell 43 is preferably such that the partition wall spacing ratio with respect to the red cell 41 is 5% or more. If the difference in barrier rib spacing is too small, there is no difference in discharge efficiency. Therefore, the ratio of the barrier rib spacing of the blue cell 43 and the green cell 42 to the barrier rib interval of the red cell 41 is 95% or less, that is, the ratio of the barrier rib gap difference is less than 95%. It is preferable to configure so as to be 5% or more. For example, the ratio of the partition wall spacing (rib width) of each cell may be red cell 41: green cell 42: blue cell 43 = 1.5: 1: 1.

FIG. 2 is a diagram comparing the properties of a red phosphor that can be applied to the plasma display apparatus according to the present embodiment and a general red phosphor that has been conventionally used. In FIG. 2, a borate red phosphor whose material composition is (Y, Gd) BO ₃ : Eu ³⁺ is a phosphor that has been conventionally used, and has good emission efficiency (in FIG. 2, ) Indicates that the color purity is inferior (indicated by Δ in FIG. 2). On the other hand, the phosphor of red Fossavana whose material composition is Y (P, V) O ₄ : Eu is a red phosphor applied to the plasma display device according to the present embodiment, and compared with borate red, It can be seen that the color purity is very excellent (indicated by “◎” in FIG. 2). However, it is shown that the phosphorescent red phosphor has a slightly lower luminous efficiency than the borate red phosphor (indicated by Δ in FIG. 2).

Therefore, the use of Fosbana red having a material composition of Y (P, V) O ₄ : Eu, which is a high-purity red phosphor, can greatly improve the red purity as compared with the prior art. Then, it turns out that it will fall if it replaces and uses as it is.

FIG. 3 is a diagram showing emission spectra of a normal purity borate red phosphor and a high purity fosvana red phosphor. In FIG. 3, the horizontal axis indicates the wavelength, and the vertical axis indicates the size of the emission spectrum.

FIG. 3 (a) is a diagram showing an emission spectrum of a conventionally used borate red phosphor. In FIG. 3 (a), three emission spectra are shown in the vicinity of a wavelength of 600 [nm], but the vicinity of the wavelength of 595 [nm] is an emission spectrum showing an orange component, which is indicated by a solid line. This corresponds to the peak of the emission spectrum. Further, a wavelength around 580 [nm] is an emission spectrum of Ne emission, and a large emission spectrum is not shown, but this also has an orange component.

On the other hand, FIG. 3B is a diagram showing an emission spectrum of phosbana red, which is a high-purity phosphor, that can be applied to the plasma display device according to the present embodiment. In FIG. 3B, although there is an emission spectrum in the vicinity of a wavelength of 595 [nm] and has an orange component, the magnitude thereof is smaller than that of borate red. In addition, a large emission spectrum exists in the wavelength range of 600 to 650 [nm], and an emission spectrum exists in the vicinity of the wavelength of 700 [nm]. The red emission spectrum component is larger than the orange component. It has become. Therefore, the red color purity of the plasma display panel 10 can be improved by using, for example, a phosphor of red Fossana for the red phosphor layer 51 of the red cell 41.

However, as shown in FIG. 2, the high-purity red phosphor phosbana red has a problem that the emission luminance is lowered. Even if it is used as it is instead of borate red, it causes various problems due to a decrease in luminance. obtain. Therefore, in the plasma display apparatus according to the present embodiment, as shown in FIG. 1, the partition wall spacing of the red cell 41 is made larger than that of the green cell 42 and the blue cell 43 to solve this problem. The specific contents will be described below.

FIG. 4 is a diagram showing emission spectrum characteristics and color gamuts in various states in order to explain an adjustment method when a high-purity red phosphor is applied to the red phosphor layer 51 of the red cell 41. 4A to 4D show emission spectra, luminance, and the number of gradations (gain) in various states. FIG. 4E shows the states in FIGS. 4A to 4D. It is the figure which showed the corresponding color gamut and white balance.

FIG. 4 (a) is a diagram showing an emission spectrum, luminance, and number of gradations (gain) of a normal red phosphor such as borate. FIG. 4 (a) shows the characteristics of a pure water phosphor. When applied to a plasma display device, it is considered that a conventionally used one in which the partition wall spacing is equal in three colors is applied. May be.

4A, the emission spectrum includes an orange component in the vicinity of 595 [nm]. In FIG. 4 (e), the color gamut corresponding to the emission spectrum of FIG. 4 (a) is an inner triangle indicated by ● and the red color gamut is narrowed. On the other hand, the white balance is good as shown in FIG. Also, the luminance and the number of gradations are in a good state as shown in FIG.

FIG. 4B is a diagram showing an emission spectrum, luminance, and number of gradations (gain) of a high purity, highly saturated red phosphor. In FIG. 4B, in the emission spectrum, the orange component of 595 nm is greatly attenuated, and the emission spectrum of 625 to 740 nm, which is the region of the red emission spectrum, is increased. The emission spectrum of 700 [nm] indicating the primary color is greatly increased as compared with the emission spectrum of FIG. As a result, the purity of red is improved. When FIG. 4E is viewed, the red region is expanded (indicated by x), and the color gamut is expanded compared to the case of FIG. 4A. I understand. However, with regard to the white balance (position W, indicated by x), it can be seen that the cyan color has increased and moved to the left, and has collapsed.

Next, referring again to FIG. 4B, the brightness and the number of gradations (gain) are maintained, and the number of gradations (gain) is maintained at the same level as in FIG. 4A. However, it can be seen that the luminance of red is reduced in luminance. Thus, when a high-purity phosphor having a material composition of Y (P, V) O ₄ : Eu or the like is used, the color purity of red is improved, but only the luminance of red is lowered, and thereby white balance is also improved. If it is applied as it is as the phosphor layer 51 of the red cell 41, the problem of brightness and white balance will occur.

FIG. 4 (c) is a diagram showing the characteristics when adjustment is made with the signal gain in order to make the red, green and blue luminances equal and restore the white balance from the state of FIG. 4 (b). It is. In FIG. 4B, when a highly saturated red phosphor is used, only the red brightness is reduced and the white balance is lost. Therefore, the green and blue gains are lowered to match the brightness of the three colors. Have been adjusted.

In this case, since a highly saturated red phosphor is used in the emission spectrum as in FIG. 4 (b), the same characteristics are exhibited and a high purity red color can be expressed. In FIG. 4 (e), the color gamut is kept wide similarly to FIG. 4 (b) (indicated by ◯ in the figure), and since the luminance is uniform, the white balance is also improved and FIG. 4 (a). It turns out that it has returned to the same state.

However, referring back to FIG. 4C, referring to the luminance and the number of gradations (gain) again, the luminance of all three colors is reduced and the number of gradations of green and blue is also reduced. In terms of the logarithm, it is not preferable.

FIG. 4 (d) shows each of the cases where adjustment was made with the rib width (distance between the partition walls) in order to make the red, green and blue luminances equal and restore the white balance from the state of FIG. 4 (b). It is the figure which showed the characteristic. Therefore, FIG. 4D shows a state where the plasma display device according to the present embodiment shown in FIG. 1 is applied.

As described with reference to FIG. 1, if the spacing between the red cells 41 is larger than the spacing between the green cells 42 and the blue cells 43, the discharge space of the red cells 41 is increased and discharge is likely to occur. The luminance of 41 is improved. On the other hand, if the space between the green cell 42 and the blue cell 43 is reduced, the luminance in the green cell 42 and the blue cell 43 can be suppressed. That is, if the partition spacing between the green cell 42 and the blue cell 43 is decreased by an amount corresponding to the increase in the partition spacing between the red cells 41, the luminance can be adjusted without changing the pixel size. Referring to the luminance graph of FIG. 4D, the luminance of the red cell 41 increases and the luminance of the green cell 42 and the blue cell 43 decreases as compared with the state of FIG. The luminance is uniform, and the entire three colors are kept at a high luminance as compared with FIG. In addition, since the adjustment based on the signal gain is not performed, the number of gradations (gain) is also the same for all three colors and is kept high as in FIG. 4B.

Further, in FIG. 4D, when the emission spectrum is seen, it can be seen that the emission spectrum of the red component is increased because the partition wall spacing of the red cell 41 is increased. Compared with FIG. 4 (c), it can be seen that since the luminance is increased, the entire emission spectrum is slightly increased. At this time, referring to FIG. 4 (e), the use of the high-purity red phosphor keeps the red color gamut expanded, and the brightness of the three colors is equal, so the white balance is also good. It turns out that it is in a state.

As described above, when a highly saturated red phosphor is used, as shown in FIG. 4B, the brightness of red is reduced and the white balance is lost, but this is not a signal gain, but a red cell 41, a green color. The overall brightness is greatly reduced by adjusting the brightness of the cell 42 and the blue cell 43 so that the brightness of the red cell 41 is larger than that of the green cell 42 and the blue cell 43. The white balance can be restored to the original without causing it. As a result, it is possible to improve the luminance, the number of gradations (gain), and the white balance while improving the red color purity.

The highly saturated red phosphor, which is a high-purity red phosphor, is not only a phosphor having a material composition of Y (P, V) O ₄ : Eu, but also other highly saturated red fluorescent materials having similar properties. The body can be appropriately applied depending on the application.

FIG. 5 is a diagram showing a partial cross-sectional configuration and a partial planar configuration of the plasma display panel 60a of the plasma display device according to the second embodiment to which the present invention is applied. In FIG. 5, the plasma display panel 60a of the plasma display apparatus according to the second embodiment has a front substrate 10 and a rear substrate 20 facing each other, and a plurality of barrier ribs 30 are provided in a space therebetween, so that a plurality of discharge cells 40a are formed. The red, green, and blue phosphor layers 51a, 52, and 53 are sequentially assigned and formed on the surface of the discharge cell 40a to form a red cell 41a, a green cell 42a, and a blue cell 43a. is doing. The red cell 41a has the same partition wall spacing as that of the green cell 42a and the blue cell 43a, as in the plasma display panel 60 of the plasma display device according to the first embodiment.

In the plasma display panel 60a of the plasma display apparatus according to the second embodiment, the size of the partition wall spacing of the green cells 42a is configured to be larger than the partition wall spacing of the blue cells 43a. 43a <green cell 42a <red cell 41a is different from the first embodiment in which blue cell 43 = green cell 42 <red cell 41.

As described above, the size of the partition space between the red cells 41a is maximized according to the type and characteristics of the plasma display panel, and further, the partition space between the green cells 42a and the blue cells 41a is also provided with a difference. Good. Also in this case, the difference between the maximum partition wall spacing and the minimum partition wall spacing is preferably 5% or more, and therefore, the ratio difference of the partition wall spacing of the blue cell 43a to the red cell 41a is preferably 5% or more. For example, the ratio between the partition walls of the discharge cells 40a of each color may be red cell 41a: green cell 42a: blue cell 43a = 1.5: 1.3: 1. These ratios can be appropriately set appropriately depending on the type and characteristics of the plasma display panel 60a.

In the plasma display panel 60a of the plasma display device according to the second embodiment, the red phosphor layer 51a of the red cell 41a is not made of a high-purity red phosphor but has a material composition of (Y, Gd) BO ₃ : Eu. This is different from the plasma display device according to the first embodiment in that a normal red phosphor such as borate red is used. For the green phosphor layer 52 and the blue phosphor layer 53, the same phosphor as that of the first embodiment may be applied, and therefore, the same reference numerals as those of the first embodiment are given.

Further, the discharge gas sealed in the red cell 41a, the green cell 42a, and the blue cell 43a is configured to be 10 to 30% with a high mixing ratio of Xe gas. Increasing the Xe gas concentration improves the luminous efficiency of the discharge cell 40a. However, when the Xe gas is increased in concentration, the luminous efficiency of each cell does not necessarily improve equally, and the blue cell 43a and the green cell 42a. And the improvement rate of the order of the red cell 41a. Therefore, in the plasma display panel 60a according to the present embodiment, the imbalance in improving the light emission efficiency is adjusted by changing the partition wall intervals of the red cell 41a, the green cell 42a, and the blue cell 43a. The plasma display device according to the present embodiment is optimally applied to the use in the case where the mixing ratio of the Xe gas in the discharge gas is increased. Hereinafter, such an application example will be described. .

FIG. 6 is a diagram showing various states of the plasma display panel 60a using a normal red phosphor and increasing the mixing ratio of the Xe gas in the discharge gas. Similar to FIG. 4, FIGS. 6A to 6D show the emission spectrum, luminance, and number of gradations (gain) in each state, and FIG. 6E shows FIGS. 6A to 6D. The color gamut and white balance corresponding to are shown.

FIG. 6A is a diagram showing characteristics of a normal red phosphor. It is assumed that the specifications required for the plasma display device according to the present embodiment are improvement of luminous efficiency, and color gamut is in a state where satisfactory characteristics are obtained with the conventional phosphor. In other words, the description will be made on the assumption that the expansion of the color gamut is not a problem and the main purpose is to improve the luminous efficiency.

In FIG. 6A, a normal red phosphor is used, but since the color gamut is not a problem, the emission spectrum is in a state where satisfactory characteristics are obtained. On the other hand, the luminance remains at a low level, indicating a state in which improvement in luminance is desired. Further, the number of gradations (gain) is sufficiently high, and satisfactory characteristics are obtained.

When the color gamut corresponding to FIG. 6 (a) is confirmed in FIG. 6 (e), a sufficient white color gamut is obtained from the preconditions, and the luminance is equal for all three colors, so that a good white balance is obtained. It turns out that it is in a state.

FIG. 6 (b) is a diagram showing each characteristic in a state where the concentration of the Xe gas of the discharge gas sealed in the discharge cell 40a is increased to increase the mixing ratio. In FIG. 6 (b), when the emission spectrum is viewed, the red emission spectrum at the wavelength of 625 to 740 [nm] does not increase so much, but the blue emission spectrum near the wavelength of 450 [nm] greatly increases. It can be seen that the green emission spectrum near 525 [nm] is smaller than the blue emission spectrum and increases at an intermediate level larger than the red emission spectrum. Focusing on the luminance, the blue luminance increase is the largest, then the green is the largest, and the red luminance increase is the smallest, indicating that there is an imbalance in the luminance of the three colors. . Further, focusing on the number of gradations (gain), it can be seen that there is no change from FIG. 6A and that a sufficient number of gradations is obtained.

When the color gamut corresponding to FIG. 6B is referred to in FIG. 6E, there is no change in the color gamut, but since the luminance of blue has increased more than that of red, the white balance is lost. It has been shown that

FIG. 6C is a diagram illustrating a state in which the luminance imbalance state illustrated in FIG. 6B is adjusted by a signal gain. In Fig. 6 (c), the gain is adjusted so that the brightness of the three colors is equal by correcting blue to green <red by largely lowering blue, then lowering green, and leaving red as it is. is doing. At this time, the luminance is in a state where the three colors are combined with a low level red. Therefore, when the emission spectrum is viewed, the increase of the blue component near the wavelength 450 [nm] and the increase of the green component near the wavelength 525 [nm] seen in FIG. 6B are suppressed, and both increases are decreased. Characteristics are shown.

When the color gamut corresponding to FIG. 6C is referred to in FIG. 6E, the color gamut is maintained in a good state and the luminance is equal for all three colors, so that the white balance is also good. It has become.

As described above, when the imbalance of the luminance increase amount due to the increase of the Xe gas concentration is adjusted by the signal gain, the luminance is inevitably adjusted to red having a low luminance improvement amount.

FIG. 6D applies the plasma display panel 60a of the plasma display apparatus according to the second embodiment shown in FIG. 5, and adjusts the luminance imbalance state of FIG. 6B by the partition spacing of the discharge cells 40a. It is the figure which showed the example to do. As described with reference to FIG. 5, in the discharge cell 40a of the plasma display panel 10a of the plasma display device according to the second embodiment, the red cell 41a has the largest barrier rib spacing, then the green cell 42a has the largest barrier rib spacing, and the blue cell 43a. The interval between the partition walls is the smallest. This is just the opposite of the luminance state shown in FIG. 6B, and the luminance of the red cell 41a is obtained by applying the plasma display device according to the present embodiment to the state of FIG. 6B. And the luminance of the blue cell 43a can be suppressed, and the luminance of the three colors can be adjusted to be equal as shown in FIG. 6 (d). By performing such adjustment, the luminance adjustment is performed based on the luminance of the green cell 42a having the intermediate luminance as a reference, and a higher luminance is used as a reference than the reference of the luminance of the red cell 41a. The brightness of the three colors can be adjusted equally. At this time, since nothing is changed from the state of FIG. 6B to the signal gain, the number of gradations (gain) is maintained in a high state as it is. Looking at the emission spectrum graph of FIG. 6 (d), the emission spectrum near 525 [nm] of the green component and the emission spectrum near 450 [nm] of the blue component are increased by the increase in the concentration of Xe gas. It can be seen that it is in a state of enjoying the benefit of improving the light emission luminance without being suppressed so much.

Referring to FIG. 6 (e), when the color gamut corresponding to FIG. 6 (d) is seen, the color gamut is kept good and the brightness of the three colors is equal, so that a good white balance is obtained. I understand that

As described above, according to the plasma display device of Example 2, the Xe gas concentration is increased to improve the light emission efficiency, and the luminance imbalance adjustment is performed not by the signal gain but by the partition wall spacing of the discharge cells 40a. Therefore, it is possible to realize a good white balance and the number of gradations (gain) without reducing the overall luminance.

FIG. 7 is a diagram showing a partial cross-sectional configuration and a partial planar configuration of the plasma display panel 60b of the plasma display device according to the third embodiment to which the present invention is applied. In the plasma display device according to the third embodiment, the relationship between the shape of the discharge cell 40a and the partition spacing of each color is the same as that of the plasma display panel 10a according to FIG. 5 described in the second embodiment. In addition, about the component similar to FIG. 5, the same referential mark is attached | subjected and the description is abbreviate | omitted.

In the plasma display device according to the third embodiment, the high saturation red phosphor is applied to the red phosphor layer 51b of the red cell 41a instead of the normal red phosphor. Different from the device. The plasma display device according to Example 3 is a combination of Example 1 and Example 2. As in Example 2, the mixing ratio of Xe gas in the discharge gas is set to a high concentration and 10 to 30%. Yes. With such a configuration, it is possible to improve the red color purity of the plasma display panel 10a and improve the light emission luminance of all three colors.

FIG. 8 is a diagram showing the characteristics of the emission spectrum, luminance, and number of gradations (gain) in various states in order to explain an application example of the plasma display device according to the third embodiment. 8A to 8D show the emission spectrum, luminance, and number of gradations (gain) in each state, respectively, and FIG. 8E corresponds to FIGS. 8A to 8D. Color gamut and white balance are shown.

FIG. 8 (a) shows a comparative example in which a conventional red phosphor such as borate red whose material composition is (Y, Gd) BO ₃ : Eu, which has been conventionally used, is applied, and Xe gas is mixed. FIG. 6 is a diagram showing characteristics when the ratio is also 6 to 8% of the normal value.

In FIG. 8A, the emission spectrum is in a state in which an emission spectrum in the vicinity of a wavelength of 595 [nm], which is an orange component, remains. The luminance is the same for all three colors, but at a low level. On the other hand, the number of gradations is a state in which high gain is obtained and good characteristics are exhibited.

In FIG. 8 (e), focusing on the color gamut corresponding to FIG. 8 (a), it is shown that the color gamut is in a narrow state. On the other hand, the white balance is in a good state because the brightness of all three colors is equal.

FIG. 8B shows a case where a high-brightness, highly saturated red phosphor is applied to the red phosphor layer 51 in a state in which the partition walls of the discharge cells 40a of the plasma display panel 60a are uniform as in the prior art, and the discharge is performed. FIG. 6 is a diagram showing each characteristic in a state where the mixing ratio of Xe gas in the gas is increased to a high concentration (for example, 10 to 30%).

In FIG. 8B, focusing attention on the emission spectrum, the orange component near the wavelength 595 [nm] is attenuated by using the highly saturated red phosphor, and the emission spectrum of the red component near the picture book 700 [nm]. It can be seen that the color increases to a high-purity red color. As for the luminance, since the Xe gas has a high concentration, as described in the second embodiment, the luminance is improved in the order of blue, green, and red, and a luminance imbalance between the colors occurs. The number of gradations is maintained as it is, and shows a good characteristic with a high number of gradations.

Referring to the color gamut and white balance corresponding to FIG. 8 (b) in FIG. 8 (e), since the highly saturated red phosphor is applied, the color purity of red is improved and the color gamut is expanded. Can be seen (indicated by x in the figure). On the other hand, since the luminance balance between the three colors is lost, the white balance is lost (indicated by W and x in the figure).

FIG. 8C is a diagram showing the characteristics of the state in which the luminance imbalance and white balance collapse in FIG. 8B are adjusted by the signal gain. In FIG. 8 (c), the luminance imbalance in FIG. 8 (b) is reduced by reducing the blue gain the most, lowering the green gain smaller than blue, and leaving the red gain unchanged. The brightness is adjusted to be uniform. In this case, the luminance of red having the lowest luminance in FIG. 8B is used as a reference, and the luminances of blue and green are lowered to the same level as the luminance of red. Focusing on the emission spectrum, the red emission spectrum is the same as the state of FIG. 4B, but the emission spectrum of the blue component near the wavelength 450 [nm] and the green component near the wavelength 525 [nm] are both attenuated. is doing.

Referring to the color gamut and white balance corresponding to FIG. 8 (c) in FIG. 8 (e), the red color purity is kept high and the white balance is good. No.

However, when the signal gain is adjusted as shown in FIG. 8C, the number of gradations is reduced and the brightness is adjusted to a low level. Therefore, there is an advantage that the luminous efficiency is improved by increasing the concentration of Xe gas. The state is offset by the decrease in luminance and the decrease in the number of gradations.

FIG. 8D is a diagram showing each characteristic when the plasma display apparatus according to the present embodiment is applied and the luminance imbalance shown in FIG. 8B is adjusted by the partition wall spacing of the discharge cell 40a. is there. In the plasma display device according to the third embodiment, the discharge cell 40a of the plasma display panel 60a is configured such that the red cell 41a has the largest barrier rib spacing, the green cell 42a has the second largest barrier rib spacing, and the blue cell 43a has the barrier rib spacing. Is the narrowest. Therefore, in the luminance characteristic of FIG. 8B, it is possible to add adjustment to increase the luminance of the red cell 41a and decrease the luminance of the blue cell 43a. Can be adjusted so that the brightness of the two becomes equal. At this time, since the signal gain is not changed, the number of gradations is kept high, and a good number of gradations is maintained. In the emission spectrum, the blue component near the wavelength of 450 [nm] is only slightly attenuated, the green component near the wavelength of 525 [nm] is maintained as it is, and the red component in the wavelength range of 625 to 740 [nm]. Has an increased emission spectrum, and a large attenuation of the emission spectrum can be avoided.

When the color gamut and white balance corresponding to the state of FIG. 8D are confirmed with reference to FIG. 7E, the color purity of red is maintained at a high purity and the white balance is also good. (It is indicated by a circle in the figure).

As described above, according to the plasma display device of Example 3, the red phosphor layer 51b is applied with phosbana red having a material composition of Y (P, V) O ₄ : Eu, which is a high purity red phosphor. If the mixing ratio of Xe gas in the discharge gas is set to a high concentration and the luminance imbalance is corrected as blue cell 43a <green cell 42a <red cell 41a, the red color purity is improved and the luminous efficiency is improved. Can be increased.

Note that various phosphor materials having similar properties can be applied to the high-purity red phosphor in addition to the fosbana red.

FIG. 9 is a diagram showing a partial cross-sectional configuration and a partial planar configuration of the plasma display panel 60c of the plasma display device according to the fourth embodiment to which the present invention is applied. The plasma display device according to the fourth embodiment has the configuration described in FIG. 1 of the first embodiment with respect to the shape of the discharge cell 40 and the size relationship between the partition walls of the red cell 41, the green cell 42, and the blue cell 43. Similar to the panel 10. That is, the red cell 41 has the largest partition wall spacing, and the green cell 42 and the blue cell 43 have the same partition wall spacing. In the plasma display panel 10c of the plasma display device according to the fourth embodiment, not the high-purity red phosphor but a normal red phosphor is applied to the red phosphor layer 51c, and the orange cut filter 11 is applied to the front substrate 10. Is different from the plasma display panel 10 of the first embodiment. Components other than the red phosphor layer 51c and the orange cut filter 11 of the phosphor layer 50c are the same as those in the plasma display panel 10 according to FIG. A description thereof will be omitted. As described above, the red color purity of the plasma display panel 10c may be improved by using the orange cut filter 11 instead of applying the high-purity red phosphor as in the first embodiment. .

Next, an application example of the plasma display device according to the fourth embodiment will be described with reference to FIG. FIG. 10 is a diagram illustrating the emission spectrum, luminance, and number of gradations (gain) of the discharge cell 40 in various states in order to explain an application example of the plasma display device according to the fourth embodiment. FIGS. 10A to 10D show the emission spectrum, luminance, and number of gradations (gain) in each state, and FIG. 10E shows the color gamut and the color gamut corresponding to FIGS. Indicates white balance.

FIG. 10A is a diagram showing characteristics of a red phosphor in a state where a normal red phosphor is used and an orange cut filter is not used. In FIG. 10A, the luminance and the number of gradations are in a good state because all three colors show high luminance and a large number of gradations. The emission spectrum shows a state in which an orange component near a wavelength of 595 [nm] remains, and a red component near a wavelength of 625 to 740 [nm] is not so large.

Referring to FIG. 10E, the color gamut and white balance corresponding to FIG. 10A can be seen to be in a narrow color gamut (indicated by ● in the figure). On the other hand, since the brightness is uniform in three colors, the white balance shows a good state.

FIG. 10B is a diagram showing each characteristic in a state where the orange cut filter 11 is provided on the front substrate 10 of the plasma display panel 60c. Referring to the emission spectrum in FIG. 10, it can be seen that the emission spectrum of the orange component near the wavelength of 595 [nm] is attenuated. Thereby, the color purity of red improves. On the other hand, the luminance is reduced only by the red luminance due to the influence of the orange cut filter 11. Also, the number of gradations is kept high with a high number of gradations.

In the color gamut corresponding to the state of FIG. 10B, as shown in FIG. 10E, the orange color component is attenuated, so that the red color purity is maintained and the color gamut is expanded. is doing. However, it can be seen that the balance of luminance among the three colors is lost, and thus the white balance is lost.

FIG. 10 (c) is a characteristic diagram showing a state in which only the red luminance shown in FIG. 10 (b) has been reduced by adjusting the signal gain. In FIG. 10C, the gains of blue and green with high luminance are reduced, and the luminance is made equal to red. That is, the overall luminance has been reduced. At this time, in the emission spectrum, both the emission spectrum of the blue component in the vicinity of the wavelength 450 [nm] and the emission spectrum of the green component in the vicinity of the wavelength 525 [nm] are attenuated.

Referring to FIG. 10 (e), the color gamut corresponding to FIG. 10 (c) is kept in a high red color purity state (indicated by a circle in the figure). Further, since the luminance is the same among the three colors, the white balance is also kept good (indicated by W and ◯ in the figure). However, as described above, although the color purity of red is improved, both the luminance and the number of gradations are in a reduced state, which is not a preferable state.

FIG. 10D is a characteristic diagram in a state where the plasma display device having the plasma display panel 60c shown in FIG. 9 according to the present embodiment is applied to the luminance imbalance state of FIG. 10B. In the plasma display panel 60c according to the fourth embodiment, the red cell 41 has the largest partition wall spacing, and the green cell 42 and the blue cell 43 both have the partition wall spacing smaller than the red cell 41 and the same size. Therefore, in the plasma display apparatus according to the present embodiment, the luminance of the red cell 41 increases, and the luminance of the green cell 42 and the blue cell 43 both decrease.

Therefore, when attention is paid to the luminance graph in FIG. 10D, the luminance is balanced between the luminance of the red cell 41 and the luminance of the green cell 42 and the blue cell 43 shown in FIG. This value is much higher than the luminance shown in (c). The luminance of the blue cell 43 and the green cell 42 is slightly reduced, and the luminance of the red cell 41 is increased and approaches. In addition, since nothing has been done with respect to the number of gradations (gain), it shows good characteristics with a high number of gradations. The emission spectrum is an emission spectrum in which the orange component is attenuated and the blue component and the green component are less attenuated.

When the color gamut and white balance corresponding to FIG. 10 (d) are confirmed with reference to FIG. 10 (e), the color gamut is kept high in red color purity, and the luminance is also good because the three colors are equal. Shows a good white balance.

As described above, according to the plasma display device according to Example 4, by using the orange cut filter 11 without applying the high-luminance red phosphor, the luminance and the number of gradations are improved while improving red with high purity. Can be kept high and a good white balance can be realized.

When the plasma display device according to the fourth embodiment and the plasma display device according to the first or third embodiment are compared, the orange cut filter 11 is unnecessary, and considering the cost, the first or third embodiment. The plasma display device according to the above is preferable. However, when it is difficult to obtain a high-purity red phosphor, or when it is necessary to improve the red color purity by modifying only the front substrate 10, the plasma display device according to Example 4 is used. Thus, the same effects as those of the first or third embodiment can be obtained.

FIG. 11 is a diagram showing a partial cross-sectional configuration and a partial planar configuration of the plasma display panel 10d of the plasma display apparatus according to the fifth embodiment to which the present invention is applied. In FIG. 11, the plasma display panel 60d of the plasma display apparatus according to the fifth embodiment is the same as that described so far, except for the basic components other than the discharge cell 40d. Is omitted.

In the plasma display apparatus according to the fifth embodiment, the discharge cell 40d has a configuration in which the red cell 41d and the green cell 42d have the same barrier rib spacing, and only the blue cell 43d has a smaller barrier rib spacing. This is different from the plasma display device according to Examples 1 to 4. When only the luminance of the blue cell 43d is higher than that of the other two colors, this configuration can correct the luminance balance.

In the plasma display panel 60d according to the fourth embodiment, the red phosphor layer 51d may be a red phosphor having a normal purity, and the mixing ratio of the Xe gas in the discharge gas may be 6-8. %. In the plasma display device according to the fourth embodiment, the luminance is improved by increasing the sustain pulse during the sustain discharge. Then, the luminance imbalance between the colors generated at that time is adjusted by the partition wall spacing of the discharge cell 40d. Hereinafter, this content is demonstrated concretely.

FIG. 12 is a diagram showing characteristics of the discharge cell 40d in various states in order to explain an application example to the plasma display device according to the present embodiment. 12A to 12D show the emission spectrum, luminance, and number of gradations (gain) in each state, and FIG. 12E corresponds to FIGS. 12A to 12D. Color gamut and white balance are shown.

FIG. 12 (a) is a diagram showing the characteristics of the sustain pulse in the normal state. The sustain pulse is a pulse that is applied at the time of the sustain discharge in the subfield, and expresses a gradation by the number of sustain discharges. The number of sustain pulses is expressed by, for example, the number of sustain pulses for each field, and may be 1000 times / field in a normal state, for example. In FIG. 12A, the case where the number of sustain pulses is 1000 times / field will be described as an example.

In FIG. 12A, when the number of sustain pulses is about 1000 times per field, the luminance and the number of gradations are arranged in three colors, but the luminance is slightly low. The emission spectrum shows a normal state.

Referring to FIG. 12 (e), the color gamut and white balance corresponding to FIG. 12 (a) are in a normal state and the white balance is well maintained.

FIG. 12 (b) is a diagram showing characteristics when the number of sustain pulses is increased. The number of sustain pulses is set to 1000 to 1500 times / field, for example, and is considered to be 1200 times / field, for example. In FIG. 12B, when the number of sustain pulses is increased, the brightness of each color increases, but the brightness of the red cell 41d and the green cell 42d is approximately the same, and the brightness of the blue cell 43d is significantly increased. At this time, since the number of gradations is not changed at all, the number of gradations is kept high. On the other hand, the emission spectrum increases as a whole because the luminance is increased as a whole, but has a characteristic that the blue component is greatly increased.

Here, with respect to the corresponding color gamut and white balance in FIG. 12B, referring to FIG. 12E, the color gamut has not changed, but the luminance has become unbalanced, so the white balance has been lost. It is in a state.

FIG. 12 (c) is a diagram showing each characteristic when the correction of the state in which the luminance of the red cell 41d and the green cell 42d in FIG. 12 (b) is reduced is performed using the signal gain. In FIG. 12B, since only the luminance of the blue cell 43d is high, the blue gain is reduced and the overall luminance is unified to the level of the red cell 41d and the green cell 42d. This corrects the luminance imbalance, but the improved luminance of the blue cell 43d is lowered to the red cell 41d and the green cell 42d. The emission spectrum shows a characteristic in which the emission spectrum of the blue component is significantly reduced as compared with FIG.

At this time, with respect to the color gamut and white balance corresponding to FIG. 12 (c), referring to FIG. 12 (e), the color gamut is kept as it is and the white balance is also good due to the three colors of brightness. The characteristics are shown.

FIG. 12D is a diagram showing characteristics in a state where the plasma display device according to the present embodiment is applied. The plasma display panel 10d shown in FIG. 11 is configured such that the red cell 41d and the green cell 42d have the same partition wall spacing and larger than the blue cell 43d, so that the red cell 41d and the green cell 42d are discharged. This promotes the discharge of the blue cell 43d. Then, the luminance of the red cell 41d and the green cell 42d is slightly increased and the luminance of the blue cell 43d is slightly decreased. Therefore, the luminance between the red and green luminances shown in FIG. Will be balanced. Therefore, the luminance is not lowered to the red and green levels, but the luminance is increased to a level between red and green and blue, so that the reduction in luminance seen in FIG. 12C can be prevented.

Here, since the number of gradations is not changed at all, it is kept at a high number of gradations. In addition, the emission spectrum shows a spectrum higher than that in FIG. 12C because the attenuation of the emission spectrum of each color is suppressed as compared with the state shown in FIG.

Further, when the color gamut and white balance corresponding to the state of FIG. 12D are confirmed with reference to FIG. 12E, the color gamut is maintained and the white balance is also in a good state.

As described above, according to the plasma display device of Example 5, even when only the luminance of the blue cell 43d is increased as compared with the red cell 41d and the green cell 42d, the luminance, the number of gradations, and the white balance are increased. High brightness can be achieved while maintaining good.

As described above, in the plasma display device, for the purpose of improving the color purity of red, improving the emission luminance, or improving the overall luminance, the plasma display is subjected to a process for attenuating the orange component, improving the luminous efficiency, or improving the luminance. When done on a panel, it tends to result in a luminance imbalance, in particular the result that the red luminance is reduced and the blue luminance is increased. In such a case, according to the plasma display device having the plasma displays 60, 60a to 60d described in the first to fifth embodiments, the partition wall spacing of the red cells 41, 41a, 41d is greater than the partition wall spacing of the blue cells 43, 43a, 43d. In addition, the partition wall spacing of the green cells 42, 42a and 42d is set between the partition walls of the red cells 41, 41a and 41d and the blue cells 43, 43a and 43d in accordance with the application to adjust the brightness. The brightness can be adjusted uniformly with high brightness without affecting the number of gradations, the white balance can be improved, and various conditions can be satisfied.

Next, parts other than the plasma display panels 60 and 60a to 60d of the plasma display device described in the first to fifth embodiments will be described with reference to FIG.

FIG. 13 is a diagram showing an example of an overall configuration diagram of the plasma display device according to the first to fifth embodiments to which the present invention is applied. In FIG. 13, the plasma display apparatus according to the present embodiment includes plasma display panels 60, 60a to 60d, an address driver 70, an X sustain driver 80, a Y sustain driver 90, a Y scan driver 100, and a control unit 110. And a signal processing unit 120 and a high-voltage power supply 130.

The plasma display panels 60, 60a to 60d are displays for displaying images, and those described in the first to fifth embodiments may be applied.

The address driver 70 applies a voltage to the address electrodes existing in the plasma display panels 60, 60a to 60d, generates an address discharge in the discharge cells 40, 40a, 40d together with the Y scan electrodes, and selects a discharge cell to emit light. It is a drive means for generating an address discharge.

The Y scan driver 100 is a driving means for applying a voltage to the Y scan electrodes existing in the plasma display panels 60, 60a to 60d and generating an address discharge together with the address electrodes.

The X sustaining driver 80 is a driving means for applying a voltage to the X sustaining electrodes existing on the plasma display panels 60, 60a to 60d.

The Y maintenance driver 90 is a driving means for applying a voltage to the Y scan electrode. A sustain pulse is alternately applied from the X sustain driver 80 and the Y sustain driver, and the sustain discharge is generated in the discharge cells in which the address discharge is generated, and light is emitted to display an image. As for the sustain pulse described in the fifth embodiment, the sustain pulse is supplied from the X sustain driver 80 and the Y sustain driver 90, and a sustain discharge is generated in the discharge cells 40, 40a, and 40d.

The control unit 110 is a means for controlling the address driver 70, the X maintenance driver 80, the Y maintenance driver 90, and the Y scanning driver 100. In the address discharge, a data signal is sent from the control unit to the address driver, and a scanning signal is sent to the Y scanning driver 100 via the Y maintaining driver 90 to control the selection of the light emitting cells. The control unit 110 may also control the sustain pulse, and the control for increasing the sustain pulse described in the fifth embodiment may be executed by the control unit 110. Further, the control unit 110 may include subfield conversion means for driving the plasma display panels 60, 60a to 60d by the subfield method.

The signal processing unit 120 is a means for performing signal processing necessary for the received video signal and the like, and performs necessary processing before sending the video signal to the control unit 110 such as γ correction and white balance adjustment. The signal processing unit 120 may be provided as necessary according to the type and application of the plasma display panels 60, 60a to 60d.

The high voltage power supply 130 is a power supply for supplying a high voltage to the X sustain driver 80, the Y sustain driver 90, and the Y scan driver 100.

As described above, the plasma display devices described in the first to fifth embodiments may include the components described in FIG. 13 as needed, and may be driven by these components.

The present invention is applicable to a plasma display device that displays an image on a plasma display panel.

Claims (10)

1. A plurality of barrier ribs are provided in a space between the front substrate and the rear substrate facing each other, and phosphor layers emitting red, green, and blue light are sequentially formed on the respective surfaces of the plurality of discharge cells partitioned between the barrier ribs. A plasma display device comprising a plasma display panel having formed red cells, green cells and blue cells,
   The plasma display device is characterized in that the partition spacing of the red cells is larger than the partition spacing of the green cells, and the partition spacing of the green cells is greater than or equal to the partition spacing of the blue cells.
2. The phosphor layer of the red cell is composed of a phosphor material having a longer emission wavelength than the emission spectrum of a red phosphor using (Y, Gd) BO ₃ : Eu as the phosphor material. The plasma display device according to claim 1.
3. The plasma display device according to claim 2, wherein the phosphor layer of the red cell is made of a phosphor material using Y (P, V) O ₄ : Eu.
4. 3. The plasma display apparatus according to claim 2, wherein the partition spacing of the green cells is equal to the partition spacing of the blue cells.
5. The red cell, the green cell, and the blue cell are filled with a discharge gas containing Xe gas, and a mixing ratio of the Xe gas in the discharge gas is 10 to 30%. 3. The plasma display device according to 2.
6. 6. The plasma display apparatus according to claim 5, wherein the partition spacing of the green cells is larger than the partition spacing of the blue cells.
7. 2. The plasma display according to claim 1, wherein the difference between the red cell barrier rib spacing and the blue cell barrier rib spacing is 5% or more of the red cell barrier rib spacing. apparatus.
8. A plurality of barrier ribs are provided in a space between the front substrate and the rear substrate facing each other, and phosphor layers that emit red, green, and blue light are sequentially formed on the respective surfaces of the plurality of discharge cells partitioned between the barrier ribs. A plasma display device comprising a plasma display panel having formed red cells, green cells and blue cells,
   The partition spacing of the red cells is larger than the partition spacing of the green cells, and the partition spacing of the green cells is formed larger than the partition spacing of the blue cells,
   The red cell, the green cell, and the blue cell are filled with a discharge gas containing Xe gas, and the mixing ratio of the Xe gas in the discharge gas is 10 to 30%. apparatus.
9. A plurality of barrier ribs are provided in a space between the front substrate and the rear substrate facing each other, and phosphor layers emitting red, green, and blue light are sequentially formed on the respective surfaces of the plurality of discharge cells partitioned between the barrier ribs. A plasma display device comprising a plasma display panel having formed red cells, green cells and blue cells,
   The partition spacing of the red cells is larger than the partition spacing of the green cells, the partition spacing of the green cells is formed equal to the partition spacing of the blue cells,
   A plasma display device comprising an orange cut filter for attenuating a component of an orange emission spectrum on the front substrate.
10. A plurality of barrier ribs are provided in a space between the front substrate and the rear substrate facing each other, and phosphor layers that emit red, green, and blue light are sequentially formed on the respective surfaces of the plurality of discharge cells partitioned between the barrier ribs. A plasma display device comprising a plasma display panel having formed red cells, green cells and blue cells,
    The partition spacing of the red cells is equal to the partition spacing of the green cells, the partition spacing of the green cells is formed larger than the spacing of the blue cells,
    The number of discharges of the discharge cell is 1000 times or more and 1500 times or less per field.

Images