JP2008262927A - Plasma display unit and video display system using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display apparatus with improved panel luminous efficiency. <P>SOLUTION: A phosphor Zn<SB>2</SB>SiO<SB>4</SB>:Mn and rear earth terbium (Tb) of which green color is deeper than that of a direct view cathode ray tube color television and oxide phosphor activated as a light emission center are put in the same phosphor layer to realize a green phosphor layer of higher brightness. For example, Y<SB>3</SB>(Al<SB>x</SB>Ga<SB>1-x</SB>O<SB>12</SB>:Tb (Tb activated YAG phosphor)) and Y<SB>2</SB>SiO<SB>5</SB>:Tb (Tb activated yttrium silicate phosphor) can be used as oxide phosphors activated by rare earth element terbium (Tb) as a light emitting center. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a plasma display display device which is a broadcast display, a computer terminal, or a flat display device used for video display. Furthermore, the present invention relates to an information video apparatus and system using this display device.

  In recent years, plasma display devices using plasma display panels (hereinafter simply referred to as PDP) are being mass-produced as broadcast display, computer terminals, or flat display devices used for image (video) display. is there.

  The plasma display device is an excitation source of short-wavelength ultraviolet light (in the case of using xenon as the rare gas, the resonance line is at 147 nm or 172 nm) generated in the negative glow region in the minute discharge space containing the rare gas in the PDP As described above, the phosphors disposed in the discharge space are caused to emit light to perform color display. In the plasma display device PDP, a rare gas resonance line having a wavelength shorter than the mercury vapor resonance line 253.7 nm is used as an excitation source of the phosphor, and the short wavelength limit is the helium resonance line 58.4 nm.

  The structure of this gas discharge cell is, for example, as described in Non-Patent Document 1, and a typical structure is shown in FIG.

  FIG. 9 is an exploded perspective view showing a configuration of a PDP of a general surface discharge type color plasma display device.

  The PDP shown in FIG. 9 is obtained by bonding and integrating a front substrate 10 and a rear substrate 20 made of a glass substrate, and each phosphor layer (red (R), green (G), blue (B)) ( 24, 25, 26) is a reflection type PDP formed on the back substrate 20 side.

  A pair of display electrodes (11, 12) are formed on the surface of the front substrate 10 on the side facing the back substrate 20 and formed in parallel at a certain distance. The pair of display electrodes (11, 12) is formed of a transparent electrode. Further, an opaque bus electrode (13, 14) for supplementing the conductivity of the transparent electrode is superimposed on the display electrode (11, 12). Is provided.

  These electrodes (11 to 14) are covered with a dielectric (for example, lead glass) layer 15 for AC drive, and a protective film 16 made of magnesium oxide (MgO) is provided on the dielectric layer 15.

  Magnesium oxide (MgO) functions to protect the dielectric layer 15 and lower the discharge start voltage because it has high sputtering resistance and a high secondary electron emission coefficient.

  On the surface of the back substrate 20 on the side facing the front substrate 10, there is an electrode group composed of address electrodes 21 orthogonal to the display electrodes (11, 12) group of the front substrate 10. Covered by a dielectric layer 22. On the dielectric layer 22, partition walls (ribs) 23 for partitioning the address electrodes 21 are provided in order to prevent the discharge from spreading (defining the discharge region). The partition wall 23 is made of low-melting glass, and the interval, height, side wall shape, and the like are all the same.

  The phosphor layers (24, 25, and 26) that emit red, green, and blue light are sequentially applied in stripes so as to cover the groove surfaces between the partition walls 23. Each phosphor layer (24, 25, 26) is formed by first forming the address electrode 21, the dielectric layer 22 and the partition wall 23 on the rear substrate 20, and then forming each phosphor layer (24, 25, 26). After forming the phosphor paste by mixing the phosphor particles forming the substrate and the vehicle by a method such as screen printing, the volatile components are removed by baking.

  Although not shown in FIG. 9, a discharge gas (for example, a mixed gas of helium, neon, xenon, etc.) is enclosed in the discharge space between the front substrate 10 and the rear substrate 20.

  In this PDP, one of the display electrodes (11, 12), for example, the display electrode 12 and the address electrode 21 is used to select a discharge cell (unit emission region or discharge spot), and the sustain discharge between the display electrodes (11, 12). The gas discharge is repeatedly executed in the selected discharge cell.

  The vacuum ultraviolet rays generated by the gas discharge excite the phosphor layer in that region, obtain visible light emission, and apply the red, green, and blue phosphor layers (24, 25, 26) corresponding to the three primary colors. A color display can be obtained by a combination of the light emission amounts of the unit light emission regions.

"Color PDP Technology and Materials" / issued by CMC Corporation]

The brightness of plasma display device PDPs, especially color PDPs, has been improved year by year, and is currently improved to about 450 cd / m ² .

However, the brightness of the PDP is still lower than the brightness of a color television image using a direct-view cathode ray tube (peak brightness of 600 to 1000 cd / m ² ), and there is a strong demand for improving the panel light emission efficiency of the PDP.

  In particular, in plasma display devices used for computer terminals, the discharge space is narrow and the discharge efficiency is reduced due to high resolution. Therefore, in order to improve the panel light emission efficiency of PDP, phosphor materials with higher light emission efficiency are used. Development and its application to PDP panels are desired.

  Furthermore, it has been pointed out that the green and red color tones by the PDP are greatly different from the color tones of direct-view cathode ray tubes used as conventional color television broadcast receivers.

  The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a green light-emitting phosphor film having higher luminous efficiency in a plasma display device.

  Another object of the present invention is to provide a technique for bringing the color tone of green light emission closer to that of a direct-view cathode ray tube color television in a plasma display device.

  Another object of the present invention is to provide a technique capable of displaying a high-quality image in a display system using a plasma display device.

  The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

  The panel light emission efficiency of the plasma display device is determined by the discharge efficiency for generating vacuum ultraviolet light that excites the phosphor and the light emission efficiency for generating visible light of the phosphor that has received the vacuum ultraviolet light.

  In particular, if the luminance of the phosphor layer exhibiting green light emission that accounts for 50% or more of the panel emission luminance can be increased, the panel emission efficiency can be increased.

Therefore, various green phosphors were prototyped and the light emission performance against vacuum ultraviolet rays (wavelength of 200 nm or less) that excites the phosphors in the PDP was evaluated. As a result, it has been found that a short afterglow oxide phosphor activated with a rare earth element terbium (Tb) as a light emission center can obtain higher emission luminance than a conventional Zn ₂ SiO ₄ : Mn phosphor.

  However, the green color tone of oxide phosphors activated by these rare earth elements terbium (Tb) is more yellowish than the green color tone of direct-view cathode-ray tube color television, and should be used alone for green phosphors. I can't.

Therefore, in the present invention, a Zn ₂ SiO ₄ : Mn phosphor having a deeper green chromaticity than a green color tone of a direct-view cathode-ray tube color television and an oxide phosphor activated with a rare earth element terbium (Tb) as a light emission center are used. It was proposed to fill one phosphor layer.

Here, Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb (Tb-activated YAG-based phosphor) is used as a short afterglow oxide phosphor activated with the rare earth element terbium (Tb) as the emission center. And Y ₂ SiO ₅ : Tb (Tb-activated yttrium silicate phosphor) were selected. Further, as the oxide luminescent material activated by rare-earth elements terbium (Tb) as a luminous center, formula _{YBO 3: Tb, LuBO 3:} Tb, GdBO 3: Tb, ScBO 3: Tb, YPO 4: Tb, LaPO 4 A mixed phosphor film was prepared using a green phosphor having a composition represented by: Tb as a main component, and the luminance characteristics were evaluated.

In particular, it was found that the phosphor having the composition formula Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb has high luminance and chromaticity in the region where the x composition value is 0.8 or more. Furthermore, it was clarified that the x composition value with the highest luminance was 1.0.

In addition, the Tb emission center concentration to be added in the phosphors of Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb and Y ₂ SiO ₅ : Tb is desirably a relatively high concentration range, and is 5 mol% or more. We found that the Tb concentration was appropriate. The upper limit of the Tb concentration is not particularly limited, but the light emission luminance is set to 20 mol% that causes concentration quenching.

Using these oxide phosphors activated by the rare earth element terbium (Tb) as the light emission center and the conventionally used Zn ₂ SiO ₄ : Mn phosphor, the green color tone is adjusted and direct-view cathode-ray tube color televisions are used. A technique for adjusting the chromaticity to a range that includes green tones has been realized.

  The plasma display panel display device and the video display system using the plasma display panel display device of the present invention achieve the above object with the following configuration.

In other words, according to a first aspect of the present invention, a pair of substrates opposed to each other with a gap between them and a gas that is formed between the pair of substrates and generates ultraviolet rays by discharge are enclosed. Plasma having at least a discharge gas space, an electrode formed on each of the opposing surfaces of the pair of substrates, and a phosphor layer formed on one surface of the pair of substrates in contact with the discharge gas space In a plasma display display device comprising a display panel and a drive circuit for driving the plasma display panel via the electrodes, the phosphor layer is an oxide in which Zn ₂ SiO ₄ : Mn and a rare earth element terbium are activated A plasma display device comprising a mixed green phosphor containing a phosphor as a main component.

According to a second aspect of the present invention, the ultraviolet ray is generated by electric discharge formed between a pair of substrates that are arranged to face each other with a gap and at least one of which is transparent. A discharge gas space in which a gas to be sealed is enclosed, a plurality of strip electrode pairs formed on one inner surface of the pair of substrates so as to extend in parallel to each other, and the plurality of strip electrode pairs are covered A dielectric layer, a plurality of pixel address electrodes formed on the other inner surface of the pair of substrates so as to be orthogonal to the plurality of strip-shaped electrode pairs, and the discharge gas of one of the pair of substrates A plasma display panel having at least a phosphor layer formed on a surface in contact with the space; and a driving circuit for driving the plasma display panel via the plurality of strip-like electrode pairs and the plurality of pixel address electrodes; With In plasma display display device, the phosphor layer, Zn ₂ SiO _4: Plasma and Mn and characterized in that the oxide fluorescent material activated with rare earth elements terbium from mixed green phosphor containing as a main component display It is a display device.

  According to a third aspect of the present invention, there is provided the plasma display device according to the first or second aspect, wherein the rare earth element terbium is activated in the mixed green phosphor. The plasma display device is characterized in that the ratio in which it is contained is in the range of 5% to less than 100%.

  According to a fourth aspect of the present invention, in the plasma display display device according to the first or second aspect, in the mixed green phosphor, the oxide phosphor in which the rare earth element terbium is activated. The plasma display device is characterized in that the ratio of the content is in the range of 40% to 90%.

According to a fifth aspect of the present invention, in the plasma display display device according to any one of the first to fourth aspects, the oxide phosphor activated with the rare earth element terbium has a composition formula. A plasma display device characterized by comprising as a main component a composition represented by Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb (x value is 0 or more and 1 or less).

According to a sixth aspect of the present invention, in the plasma display display device according to any one of the first to fourth aspects, the oxide phosphor activated with the rare earth element terbium has a composition formula. A plasma display device characterized by comprising as a main component a composition represented by Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb (x value is 0.8 or more and 1 or less).

According to a seventh aspect of the present invention, in the plasma display display device according to any one of the first to fourth aspects, the oxide phosphor activated with the rare earth element terbium has a composition formula. A plasma display device characterized by comprising a composition represented by Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb (x value is 1) as a main component.

An eighth invention according to an eighth aspect of the present invention is the plasma display display device according to any one of the first to fourth aspects, wherein the oxide phosphor activated with the rare earth element terbium has a composition formula. A plasma display device characterized by comprising a composition represented by Y ₂ SiO ₅ : Tb as a main component.

According to a ninth aspect of the present invention, in the plasma display display device according to any one of the first to fourth aspects, the oxide phosphor activated with the rare earth element terbium has a composition formula. A plasma display device characterized by comprising at least one of YBO ₃ : Tb, LuBO ₃ : Tb, GdBO ₃ : Tb, ScBO ₃ : Tb, YPO ₄ : Tb, LaPO ₄ : Tb as a main component. is there.

  The tenth aspect of the present invention is the plasma display device according to any one of the first to ninth aspects, wherein the rare earth element in the oxide phosphor activated with the rare earth element terbium is provided. The plasma display device is characterized in that the added concentration of terbium is 1 mol% or more.

  An eleventh aspect of the present invention is the plasma display display device according to any one of the first to ninth aspects, wherein the rare earth element in the oxide phosphor activated with the rare earth element terbium is provided. The plasma display device is characterized in that the terbium addition concentration is 10 mol% or more and 30 mol% or less.

  According to a twelfth aspect of the present invention, a chromaticity point x of an emission color of the mixed green phosphor in the plasma display display device according to any one of the first to eleventh aspects is 0.264 or more, An image display system comprising a plasma display device of 0.367 or less.

  According to a thirteenth aspect of the present invention, the chromaticity point y of the emission color of the mixed green phosphor in the plasma display display device according to any one of the first to eleventh aspects is 0.683 or less, A video display system comprising a plasma display device of 0.569 or more.

The fourteenth invention according to the fourteenth aspect of the present invention is the plasma display display device according to any one of the first to eleventh aspects, wherein the phosphor layer contains Zn ₂ SiO ₄ : Mn as a main component. The plasma display device is characterized by having a laminated structure of the above layer and a layer mainly composed of an oxide phosphor activated by rare earth element terbium.

The following is a brief description of an effect obtained by the representative inventions disclosed in the present application.
(1) According to the present invention, the panel light emission efficiency of the plasma display device can be improved.
(2) According to the present invention, the brightness and chromaticity of the green phosphor layer can be adjusted.
(3) According to the present invention, green light emission with short afterglow can be easily obtained, so that a high-luminance, high-quality image can be displayed and a plasma display display system excellent in stability can be realized. It becomes possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is an exploded perspective view showing the configuration of the PDP of the plasma display device in accordance with the first exemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of one pixel of the PDP of this embodiment. Since the configuration of the PDP of the plasma display device of the present embodiment is almost the same as that of the PDP shown in FIG. 9, detailed description thereof is omitted. However, the phosphor layer 25 is a mixture of an oxide phosphor activated with the rare earth element terbium (Tb), which is one of the features of the present invention, as a light emission center and a conventionally used Zn ₂ SiO ₄ : Mn phosphor. Filled with green phosphor. In FIG. 2, the front substrate 10 side is shown rotated by ± 90 °.

  In the PDP of the surface discharge type color PDP as in the present embodiment, for example, a negative voltage is applied to the display electrode 12 (generally called a scan electrode), and a positive voltage (display) is applied to the address electrode 21 and the display electrode 11. Discharge is generated by applying a positive voltage as compared to the voltage applied to the electrode 12, and thereby, wall charges serving as an auxiliary for starting the discharge between the display electrode 11 and the display electrode 12. (This is referred to as writing.) When an appropriate reverse voltage is applied between the display electrode 11 and the display electrode 12 in this state, both are connected via the dielectric 15 (and the protective layer 16). Discharge occurs in the discharge space between the electrodes. When the voltage applied to the display electrode 11 and the display electrode 12 is reversed after the discharge is completed, a new discharge is generated. By repeating this, a discharge is continuously generated (this is called a sustain discharge or a display discharge).

  The PDP according to the present embodiment is composed of the glass substrate material after the address electrode 21 made of silver or the like and the dielectric layer 22 made of glass material are formed on the back substrate 20. The partition wall material to be formed is thick-film printed, and the partition wall 23 is formed by blast removal using a blast mask. Next, red, green, and blue phosphor layers (24, 25, 26) are sequentially formed in stripes on the barrier ribs 23 so as to cover the groove surfaces between the corresponding barrier ribs 23.

  Here, each phosphor layer (24, 25, 26) corresponds to red, green and blue, and 40 parts by weight of red phosphor particles (60 parts by weight of the vehicle) and 34 parts by weight of green phosphor particles (66 parts by weight of the vehicle). Part), 30 parts by weight of blue phosphor particles (70 parts by weight of the vehicle), mixed with the vehicle to form a phosphor paste, applied by screen printing, and then evaporated and evaporated of the volatile components in the phosphor paste. It is formed by burning off organic matter. The phosphor layer used in the present embodiment is composed of each phosphor particle having a median particle diameter of 3 μm.

The material of each phosphor is (Y, Gd) BO ₃ : Eu for red phosphor, Zn ₂ SiO ₄ : Mn phosphor and Y ₃ Al ₅ O ₁₂ : Tb phosphor (Tb phosphor for green phosphor) The blue phosphor is BaMgAl ₁₀ O ₁₄ : Eu.

  Next, the front substrate 10 on which the display electrodes (11, 12), the bus electrodes (13, 14), the dielectric layer 15, and the protective layer 16 are formed and the rear substrate 20 are frit-sealed, and the inside of the panel is evacuated. Post discharge gas is injected and sealed. The PDP of this embodiment has a 42-inch wide type, a pixel count equivalent to VGA (852 × 480), and a pitch of one pixel is 490 μm × 1080 μm.

Next, in this embodiment, a 1: 1 mixed green phosphor of Zn ₂ SiO ₄ : Mn phosphor and Y ₃ Al ₅ O ₁₂ : Tb phosphor has a Tb in the Y ₃ Al ₅ O ₁₂ : Tb phosphor. The plasma display device was prepared by changing the concentration from 0.5 mol% to 30 mol%, using the same material for the red and blue phosphors and filling the green phosphor layer 25 with the mixed green phosphors having each Tb concentration. The emission brightness and chromaticity point in all green display were examined.

Here, the case where the green phosphor is a single Zn ₂ SiO ₄ : Mn phosphor is manufactured as a comparative example, and the emission brightness of the all-green display of this plasma display device is set to 100, and each plasma display device in the present embodiment. The light emission luminance in all green display is shown as a relative value.

  The relative luminance of the produced plasma display device was in the range of 53 to 128.

The green chromaticity point changed almost linearly from (0.241, 0.641) to (0.326, 0.617) in the xy chromaticity coordinate display. The chromaticity when the green phosphor was a single Zn ₂ SiO ₄ : Mn phosphor was (0.240, 0.700).

Furthermore, when the Tb concentration in the Y ₃ Al ₅ O ₁₂ : Tb phosphor is 20 mol%, the mixing ratio with the Zn ₂ SiO ₄ : Mn phosphor is 5%, 10%, 20%, 40%, 50%. , 60%, 80%, 90%, 95%, and 100%, the relative luminance and chromaticity were examined.

  The relative luminance under each condition was in the order of 101, 103, 106, 112, 115, 118, 124, 127, 128, 130.

  The chromaticity in all green display under the same conditions is (0.254, 0.695), (0.264, 0.683), (0.283, 0.662), (0.313, 0.628), (0.326, 0.615), (0.336, 0.602) , (0.355, 0.582), (0.363, 0.573), (0.367, 0.569), (0.370, 0.565).

In particular, relatively good luminance and chromaticity characteristics were obtained when the Tb concentration was 1 mol% or more. In addition, values exceeding 5 and 20 mol% and exceeding the brightness when using a single Zn ₂ SiO ₄ : Mn phosphor, which is a conventional green phosphor, were satisfactory.

In the present embodiment, the phosphor material excluding the green phosphor has been described for the case where the red phosphor is (Y, Gd) BO ₃ : Eu and the blue phosphor is BaMgAl ₁₀ O ₁₄ : Eu. The present invention is not limited to this, and the present invention can be applied to phosphor materials other than those described above and combinations of phosphor materials other than those described above, and also to various particle sizes and sizes. Commonly applicable.

  The size of the PDP to which the present invention can be applied is not particularly limited, and should be applied regardless of parameters that determine the size of the PDP, such as various screen sizes (about 15 to 100 inches), resolution, pixel size, and the like. Can do.

(Embodiment 2)
Since the configuration of the PDP of the plasma display device of the present embodiment is the same as that of the PDP shown in FIG. 9, detailed description thereof is omitted. In the first embodiment, the Tb concentration in the Y ₃ Al ₅ O ₁₂ : Tb phosphor and the mixing ratio with the Zn ₂ SiO ₄ : Mn phosphor are shown. Here, for the phosphor represented by the composition formula Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb, the Tb concentration is kept constant at 10 mol%, and the x value in the composition formula is changed from 0.4 to 1.0. Relative luminance and chromaticity point in all green display were examined. The x value was examined for four conditions of 0.4, 0.6, 0.8, and 1.0. The phosphor layer 25 is filled with the green phosphor by screen printing. First, Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb phosphor, then Zn ₂ SiO ₄ : Mn phosphor. Printing was performed twice to form a phosphor layer 25 in which two kinds of phosphors shown in FIG. 3 were laminated.

As in the first embodiment, each phosphor layer (24, 25, 26) corresponds to red, green, and blue, 40 parts by weight of red phosphor particles (60 parts by weight of vehicle), and 17 parts of green phosphor particles. One part of Zn ₂ SiO ₄ : Mn phosphor and _four kinds of Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb phosphor (Tb concentration 10 mol%) are prepared in parts by weight (83 parts by weight of vehicle). , 30 parts by weight of the blue phosphor particles (70 parts by weight of the vehicle), mixed with the vehicle to form a phosphor paste, applied by screen printing, and then dried and fired to evaporate the volatile components in the phosphor paste and remove organic matter. It was formed by burning off. The material of each phosphor is (Y, Gd) BO ₃ : Eu for red phosphor, BaMgAl ₁₀ O ₁₄ : Eu for blue phosphor, and Zn ₂ SiO ₄ : Mn phosphor for green phosphor. And Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb phosphor (Tb concentration 10 mol%) were prepared separately.

  The relative luminance under each condition was in the order of 68, 79, 105, 118. In addition, the chromaticity in all green display under the same conditions changed in the order of (0.262, 0.588), (0.290, 0.644), (0.310, 0.619), (0.317, 0.608).

A relatively good luminance and chromaticity characteristic was obtained with an x value of 0.6 or more. In particular, a value exceeding 0.8 when the single green Zn ₂ SiO ₄ : Mn phosphor, which is a conventional green phosphor, was used alone was obtained, which was good. Furthermore, the x value was 1.0, the relative luminance was the maximum, and the chromaticity was also good.

Thus, the rare earth element terbium-activated Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb phosphor (Tb concentration 10 mol%) and Zn ₂ SiO ₄ : Mn phosphor are stacked. In the phosphor layer 25, the relative luminance can be adjusted, and it has been demonstrated that the chromaticity can be adjusted to near the chromaticity value (0.285, 0.617) of the direct-view cathode ray tube.

In the present embodiment, the phosphor material excluding the green phosphor has been described for the case where the red phosphor is (Y, Gd) BO ₃ : Eu and the blue phosphor is BaMgAl ₁₀ O ₁₄ : Eu. The present invention is not limited to this, and the present invention can be applied to phosphor materials other than those described above and combinations of phosphor materials other than those described above, and also to various particle sizes and sizes. Commonly applicable.

  The size of the PDP to which the present invention can be applied is not particularly limited, and should be applied regardless of parameters that determine the size of the PDP, such as various screen sizes (about 15 to 100 inches), resolution, pixel size, and the like. Can do.

(Embodiment 3)
Since the configuration of the PDP of the plasma display device of the present embodiment is the same as that of the PDP shown in FIG. 9, detailed description thereof is omitted.

  FIG. 4 is a diagram showing the partition wall spacing for one pixel of the PDP of the plasma display device of the present embodiment. In the present embodiment, a structure of the back substrate 20 different from that of the above embodiment is used. The interval between the barrier ribs 23 was changed to a maximum of 40%, with a green discharge cell size (a partition interval) being 100%, a red discharge cell being 80%, a blue discharge cell being 120%. .

Here, the relative luminance and the chromaticity point in the all-green display were examined with the Tb concentration added in the phosphor of composition formula Y ₂ SiO ₅ : Tb fixed at 10 mol%. Each phosphor was filled by screen printing to form each phosphor layer (24, 25, 26) shown in FIG.

As in the first embodiment, each phosphor layer (24, 25, 26) corresponds to red, green, and blue, and 35 parts by weight of red phosphor particles (65 parts by weight of vehicle) and green phosphor particles 40 are used. Using a mixture of Zn ₂ SiO ₄ : Mn phosphor and Y ₂ SiO ₅ : Tb phosphor as a weight part (60 parts by weight of the vehicle), 50 parts by weight of blue phosphor particles (50 parts by weight of the vehicle) are mixed with the vehicle. The phosphor paste was applied by screen printing, and was formed by evaporating the volatile components in the phosphor paste and burning off organic substances by drying and firing processes. The material of each phosphor is (Y, Gd) BO ₃ : Eu for red phosphor, BaMgAl ₁₀ O ₁₄ : Eu for blue phosphor, and Zn ₂ SiO ₄ : Mn phosphor for green phosphor. And a green phosphor in which Y ₂ SiO ₅ : Tb phosphor was mixed 1: 1.

The relative luminance of the single Zn ₂ SiO ₄ : Mn phosphor was 115, and the chromaticity in all green display under the same conditions was (0.299, 0.626).

Thus, the relative luminance was high and the chromaticity point was also good. In the mixed phosphor of Y ₂ SiO ₅ : Tb phosphor activated by rare earth element terbium and Zn ₂ SiO ₄ : Mn phosphor, the mixing ratio and the Tb addition concentration are not limited.

Further, as an oxide phosphor activated by rare earth element terbium (Tb), a mixed green phosphor film using the following green light emitting phosphor was evaluated. Study The green phosphor, the composition formula _{YBO 3: Tb, LuBO 3:} Tb, GdBO 3: Tb, ScBO 3: Tb, YPO 4: Tb, LaPO 4: phosphor group mainly a composition represented by Tb The brightness was evaluated by selecting at least one or more materials sequentially. The mixing ratio at this time was fixed at 50%, and the addition concentration of the rare earth element terbium (Tb) was fixed at 1 mol%. First, in the case where a phosphor providing a kind of green light emission selected from the above phosphor group and a Zn ₂ SiO ₄ : Mn phosphor were mixed, an increase in luminance could be confirmed.

_{Further, Y 3 Al 3 Ga 2 O} 12: Tb and Y ₂ SiO _5: 2 kinds of Tb, or YBO _3: Tb and LuBO _3: When mixed simultaneously two kinds of _{Tb, Y 3 Al 5 O 12} : Tb Increased brightness even when three types of GdBO ₃ : Tb and ScBO ₃ : Tb or Y ₃ Al ₂ Ga ₃ O ₁₂ : Tb and YPO ₄ : Tb and LaPO ₄ : Tb are mixed at the same time did it. It was confirmed that the chromaticity points of green light emission generated from these fluorescent films were x values of 0.264 or more and 0.367 or less and y values of 0.683 or less and 0.569 or more.

In the present embodiment, the phosphor material excluding the green phosphor has been described for the case where the red phosphor is (Y, Gd) BO ₃ : Eu and the blue phosphor is BaMgAl ₁₀ O ₁₄ : Eu. The present invention is not limited to this, and the present invention can be applied to phosphor materials other than those described above and combinations of phosphor materials other than those described above, and also to various particle sizes and sizes. Commonly applicable.

  The size of the PDP to which the present invention can be applied is not particularly limited, and should be applied regardless of parameters that determine the size of the PDP, such as various screen sizes (about 15 to 100 inches), resolution, pixel size, and the like. Can do.

(Embodiment 4)
Hereinafter, a display system using the PDP of each of the embodiments will be described.

  FIG. 5 is a block diagram showing a schematic configuration of the plasma display panel unit 100 using the PDP of each of the embodiments. As shown in the figure, the plasma display panel unit 100 includes a PDP 110, data driver circuits (121, 122), a scan driver circuit 130, a high voltage pulse generation circuit (141, 142), and a control circuit 150 for controlling the circuits. Consists of.

  Here, the PDP 110 is the PDP described in each of the above embodiments, and the PDP 110 is driven by a dual scan method in which the screen is divided into upper and lower parts and simultaneously driven. Therefore, two data driver circuits (121, 122) are provided on the long side of the PDP 110, and the two data driver circuits (121, 122) drive the upper and lower address electrodes 21 simultaneously.

  A scan driver circuit 130 is provided on one side of the short side of the PDP 110, and the scan driver circuit 130 drives the display electrode 22. The high voltage pulse generation circuit 141 generates a high voltage pulse applied to the display electrode 22 from the scan driver circuit 130.

  The other side of the short side of the PDP 110 is provided with a high voltage pulse generation circuit 142, which generates a high voltage pulse and drives the display electrode 21.

  FIG. 6 is a block diagram showing a schematic configuration of an example of a plasma display module 200 including the plasma display panel unit 100 shown in FIG. As shown in the figure, the plasma display module 200 includes an input signal processing circuit 211, an image quality improvement processing circuit 212, a frame memory 213, a signal processing circuit 210 comprising a scan / data driver control circuit 214, a power adjustment circuit 220, a high voltage power supply. The circuit 230 and the plasma display panel unit 100 are configured. The input image signal input to the plasma display module 200 is subjected to signal processing such as γ correction in the input signal processing circuit 211 and the image quality improvement processing circuit 212 and then stored in the frame memory 213. In this case, when the input image signal is an analog signal, the input signal processing circuit 211 converts it into digital data.

  The scan / data driver control circuit 214 controls and drives the data driver circuits (121, 122) and the scan driver circuit 130.

  FIG. 7 is a block diagram showing a schematic configuration of an example of a plasma display monitor 300 including the plasma display module 200 shown in FIG. FIG. 8 is a block diagram showing a schematic configuration of an example of a PDP television system 400 including the plasma display module 200 shown in FIG. 7 and 8, 310 is a speaker, and 410 is a television tuner. In the plasma display monitor 300 shown in FIG. 7 and the plasma display television system 400 shown in FIG. 8, video, audio, and power are supplied from the outside. As the external signal source in FIG. 7, a tuner, a personal computer, a video deck, a CD / DVD player, an Internet terminal, a telephone line, a digital signal source, and the like can be considered. As the signal source in FIG. PCs, VCRs, CD / DVD players, Internet terminals, telephone lines, digital signal sources, etc.

  The image quality obtained by these display systems is high in brightness and good in quality, and the color temperature at the time of white display is 6000 K or more, and the color temperature can be adjusted.

  Although the invention made by the present inventor has been specifically described based on the above-described embodiment, the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the invention. Of course.

It is a disassembled perspective view which shows the structure of the plasma display panel of the plasma display apparatus of Embodiment 1 of this invention. It is sectional drawing which shows the structure for 1 pixel of the plasma display panel of Embodiment 1 of this invention. It is sectional drawing which shows the structure for 1 pixel of the plasma display panel of Embodiment 2 of this invention. It is a figure which shows the partition space | interval for 1 pixel of the plasma display panel of the plasma display apparatus of Embodiment 3 of this invention. It is a block diagram which shows schematic structure of the plasma display panel part which uses the plasma display panel of each said embodiment. It is a block diagram which shows schematic structure of an example of a plasma display module provided with the plasma display panel part shown in FIG. It is a block diagram which shows schematic structure of an example of a plasma display monitor provided with the plasma display module shown in FIG. It is a block diagram which shows schematic structure of an example of a plasma display television system provided with the plasma display module shown in FIG. It is a disassembled perspective view which shows the structure of the plasma display panel of a general surface discharge type color plasma display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Front substrate, 11, 12 ... Display electrode, 13, 14 ... Bus electrode, 15, 22 ... Dielectric layer, 16 ... Protective film, 20 ... Back substrate, 21 ... Address electrode, 23 ... Partition, 24 ... Red ( R) phosphor layer, 25 ... green (G) phosphor layer, 26 ... blue (B) phosphor layer, 100 ... plasma display unit, 110 ... plasma display panel, 121, 122 ... data driver circuit, 130 DESCRIPTION OF SYMBOLS ... Scan driver circuit, 141, 142 ... High voltage pulse generation circuit, 150 ... Control circuit, 200 ... Plasma display module, 210 ... Signal generation circuit, 211 ... Input signal processing circuit, 212 ... Image quality improvement processing circuit, 213 ... Frame memory, 214 ... Scan / data driver control circuit, 220 ... Power adjustment circuit, 230 ... High-voltage power supply circuit, 300 ... Plasma display monitor, 31 ... speaker, 400 ... plasma display television system, 410 ... TV tuner.

Claims (14)

A pair of substrates opposed to each other with a gap between them;
A discharge gas space formed between the pair of substrates, in which a gas that generates ultraviolet rays by discharge is enclosed;
An electrode formed on each of the opposing surfaces of the pair of substrates;
A plasma display panel comprising at least a phosphor layer formed on one surface of the pair of substrates in contact with the discharge gas space;
In a plasma display display device comprising a drive circuit for driving the plasma display panel via the electrodes,
The plasma display device, wherein the phosphor layer is made of a mixed green phosphor containing Zn ₂ SiO ₄ : Mn and an oxide phosphor activated by a rare earth element terbium as main components. A pair of substrates disposed opposite each other via a gap, at least one of which is transparent;
A discharge gas space formed between the pair of substrates, in which a gas that generates ultraviolet rays by discharge is enclosed;
A plurality of strip-shaped electrode pairs formed on one inner surface of the pair of substrates so as to extend in parallel with each other;
A dielectric layer covering the plurality of strip-shaped electrode pairs;
A plurality of pixel address electrodes formed on the other inner surface of the pair of substrates so as to be orthogonal to the plurality of strip-shaped electrode pairs;
A plasma display panel comprising at least a phosphor layer formed on one surface of the pair of substrates in contact with the discharge gas space;
In a plasma display display device comprising the plurality of strip-like electrode pairs and a drive circuit for driving the plasma display panel via the plurality of pixel address electrodes,
The plasma display device, wherein the phosphor layer is made of a mixed green phosphor containing Zn ₂ SiO ₄ : Mn and an oxide phosphor activated by a rare earth element terbium as main components.   3. The plasma display according to claim 1, wherein in the mixed green phosphor, a ratio of the oxide phosphor activated by the rare earth element terbium is in a range of 5% to less than 100%. 4. apparatus.   3. The plasma display device according to claim 1, wherein a ratio of the oxide phosphor activated by the rare earth element terbium in the mixed green phosphor is in a range of 40% to 90%. 4. . The oxide phosphor activated by the rare earth element terbium has a composition represented by a composition formula Y ₃ (Al _x Ga _{1 -x} ) ₅ O ₁₂ : Tb (x value is 0 or more and 1 or less). The plasma display device according to claim 1, wherein the plasma display device is a main component. The rare earth element terbium-activated oxide phosphor mainly has a composition represented by a composition formula Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb (x value is 0.8 or more and 1 or less). The plasma display device according to any one of claims 1 to 4, wherein the plasma display device is a component. The oxide phosphor activated by the rare earth element terbium has a composition represented by a composition formula Y ₃ (Al _x Ga _1-x ) ₅ O ₁₂ : Tb (x value is 1) as a main component. The plasma display device according to claim 1, wherein the plasma display device is a display device. 5. The plasma display according to claim 1, wherein the oxide phosphor activated by the rare earth element terbium contains a composition represented by a composition formula Y ₂ SiO ₅ : Tb as a main component. Display device. Oxide luminescent material activated by the rare earth element terbium, composition formula _{YBO 3: Tb, LuBO 3:} Tb, GdBO 3: Tb, ScBO 3: Tb, YPO 4: Tb, LaPO 4: at least one of: Tb The plasma display device according to any one of claims 1 to 4, characterized by comprising the above as a main component.   The plasma display device according to any one of claims 1 to 9, wherein the rare earth element terbium added in the oxide phosphor activated with the rare earth element terbium has an addition concentration of 1 mol% or more.   10. The plasma display device according to claim 1, wherein the rare earth element terbium added in the oxide phosphor activated with the rare earth element terbium has a concentration of 5 mol% or more and 20 mol% or less. .   12. A video display system comprising the plasma display device according to claim 1, wherein a chromaticity point x of an emission color of the mixed green phosphor is not less than 0.254 and not more than 0.367.   12. A video display system comprising the plasma display device according to claim 1, wherein a chromaticity point y of the emission color of the mixed green phosphor is 0.695 or less and 0.569 or more. The phosphor layer has a laminated structure of a layer mainly composed of Zn ₂ SiO ₄ : Mn and a layer mainly composed of an oxide phosphor activated by a rare earth element terbium. Item 12. The plasma display device according to any one of Items 1 to 11.

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