JP2007128737A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of suppressing generation of noises even at a location of low atmospheric pressure, such as highland, while suppressing increase of the number of components. <P>SOLUTION: This plasma display device (display device) 1 is provided with a front substrate 2, a rear substrate 3 having a barrier rib 34 of height H1 (about 100 μm), a sealing material 4 for sealing the front substrate 2 and the rear substrate 3. The sealing material 4 has a height H2 (about 70 μm-about 80 μm) that is shorter than the height H1 (about 100 μm) of the barrier rib 34 of the rear substrate 3, and the front substrate 2 and the rear substrate 3 are sealed by the sealing material 4 with the barrier rib 34 of the rear substrate pressing the front substrate 2, and the barrier rib 34 of the rear substrate 3 has a cutout 34a for ventilation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device that suppresses the generation of noise.

  Conventionally, there has been known a display device that suppresses the generation of noise by suppressing the vibration of the front substrate during driving (see, for example, Patent Documents 1 to 3).

  Patent Document 1 discloses a plasma display panel (display) that suppresses generation of a gap between a front substrate and vertical ribs, thereby suppressing vibration of the front substrate during driving and suppressing noise generation. Apparatus). In the conventional plasma display panel disclosed in Patent Document 1, a horizontal rib is provided integrally with the vertical rib at the end of the vertical rib, thereby suppressing the bulge from being formed at the end of the vertical rib. Thereby, it is possible to suppress the generation of a gap between the front substrate and the vertical rib.

  Moreover, in the said patent document 2, it suppresses that a front substrate vibrates at the time of a drive by generating the force which adheres a front substrate and a back substrate around a display area, and suppresses generation | occurrence | production of noise. (Display device) is disclosed. The conventional plasma display panel disclosed in Patent Document 2 includes a first sealed space (discharge space) formed by a front substrate, a rear substrate, and a first sealing material (sealing material), and a front substrate. And a rear substrate, a first sealing material, and a second sealing space formed by the second sealing material. The second sealed space is provided on the outer periphery (around the display area) of the first sealed space as viewed in plan. Then, by setting the pressure in the second sealed space to a pressure lower than the atmospheric pressure and the pressure in the first sealed space, a force for bringing the front substrate and the back substrate into close contact with each other around the display area can be generated by the atmospheric pressure. Is possible.

  Patent Document 3 discloses a plasma display panel (display device) that suppresses vibration of the front substrate during driving and suppresses generation of noise by bonding the partition wall and the front substrate with a bonding material. ing.

JP 2002-15676 A JP 2003-317634 A JP 2002-8550 A

  However, in the plasma display panel disclosed in Patent Document 1, it is possible to suppress the generation of noise by suppressing the vibration of the front substrate during normal use. It is considered that a gap is generated between the barrier ribs and the front substrate due to the small difference between the atmospheric pressure and the pressure in the discharge space at a low location. As a result, it is considered that there is a problem that the front substrate vibrates during driving and generates noise.

  Further, in the plasma display panel disclosed in Patent Document 2, it is possible to suppress the generation of noise by suppressing the vibration of the front substrate during normal use. In a place where the surface area is low, the force for bringing the front substrate and the rear substrate into close contact with each other around the display area due to the atmospheric pressure becomes small, which may cause a problem that the front substrate vibrates and generates noise during driving. Moreover, since it is necessary to provide a second sealing material separately in addition to the first sealing material, there is a problem that the number of parts increases accordingly.

  Further, in the plasma display panel disclosed in Patent Document 3, it is possible to suppress the generation of noise by suppressing the vibration of the front substrate during driving even in a place where the atmospheric pressure is low, such as a high altitude. On the other hand, since it is necessary to separately provide a bonding material for bonding the partition wall to the front substrate, there is a problem that the number of parts increases accordingly.

  The present invention has been made in order to solve the above-described problems, and one object of the present invention is to suppress noise even in a low-pressure place such as a high altitude while suppressing an increase in the number of parts. It is an object of the present invention to provide a display device capable of suppressing the occurrence.

  A display device according to a first aspect of the present invention includes a first substrate, a second substrate provided with a partition wall having a first height, and a sealing material that seals the first substrate and the second substrate. In the display device including the sealing material, the sealing material has a second height smaller than the first height of the partition walls of the second substrate, and the partition walls of the second substrate press the first substrate, The first substrate and the second substrate are sealed with a sealing material, and the first substrate and the second substrate include a glass substrate, and the second height of the sealing material causes the partition wall to contact the glass substrate. In such a state, the glass substrate is set to a height at which the first substrate and the second substrate can be sealed by bending the glass substrate, and the partition wall of the second substrate has a notch for ventilation.

  In the display device according to the first aspect, as described above, the second height of the sealing material is made smaller than the first height of the partition walls of the second substrate, whereby the first substrate, the second substrate, In a state where is sealed with a sealing material, the partition walls of the second substrate press the first substrate. Thereby, since the partition presses the first substrate even in a place where the atmospheric pressure is low, such as a high altitude, it is possible to suppress the generation of a gap between the partition and the first substrate. Therefore, since it can suppress that a 1st board | substrate vibrates at the time of a drive, it can suppress that a noise generate | occur | produces. In addition, unlike the case where the partition wall and the first substrate are bonded by the bonding material, it is not necessary to separately provide the bonding material, so that an increase in the number of components can be suppressed. As a result, it is possible to suppress the occurrence of noise even in a place with a low atmospheric pressure such as a high altitude while suppressing an increase in the number of parts. Further, by configuring the first substrate and the second substrate to be sealed by the sealing material in a state where the partition of the second substrate presses the first substrate, the atmospheric pressure such as high altitude can be easily reduced. It is possible to suppress the generation of a gap between the partition wall and the first substrate even at the place. In addition, the first substrate and the second substrate include the glass substrate, and the second height of the sealing material is bent in a state where the partition wall is in contact with the glass substrate. By setting the height so that the two substrates can be sealed, the first substrate and the second substrate can be easily sealed with the sealing material while the partition wall presses the first substrate. it can. Further, by configuring the partition of the second substrate to have a ventilation notch, the region formed by the partition is connected to the region formed by the adjacent partition by the ventilation notch. Therefore, intake and exhaust of the space (discharge space) formed by sealing the first substrate and the second substrate with the sealing material can be performed by one vent.

  The display device according to the second aspect of the present invention seals the first substrate, the second substrate provided with the partition wall having the first height, the first substrate and the second substrate, and the second substrate. And a sealing material having a second height smaller than the first height of the partition walls of the substrate.

  In the display device according to the second aspect, as described above, the second height of the sealing material is made smaller than the first height of the partition walls of the second substrate, whereby the first substrate, the second substrate, In a state where is sealed with a sealing material, the partition walls of the second substrate press the first substrate. Thereby, since the partition presses the first substrate even in a place where the atmospheric pressure is low, such as a high altitude, it is possible to suppress the generation of a gap between the partition and the first substrate. Therefore, since it can suppress that a 1st board | substrate vibrates at the time of a drive, it can suppress that a noise generate | occur | produces. In addition, unlike the case where the partition wall and the first substrate are bonded by the bonding material, it is not necessary to separately provide the bonding material, so that an increase in the number of components can be suppressed. As a result, it is possible to suppress the occurrence of noise even in a place with a low atmospheric pressure such as a high altitude while suppressing an increase in the number of parts.

  In the display device according to the second aspect, preferably, the first substrate and the second substrate are sealed with a sealing material in a state where the partition of the second substrate presses the first substrate. If comprised in this way, it can suppress easily that a space | gap generate | occur | produces between a partition and a 1st board | substrate also in places with low air pressure, such as a high altitude.

  In the display device according to the second aspect, preferably, the first substrate and the second substrate include a glass substrate, and the second height of the sealing material is such that the partition wall is in contact with the glass substrate. The height is set such that the glass substrate can be bent to seal the first substrate and the second substrate. If comprised in this way, a 1st board | substrate and a 2nd board | substrate can be easily sealed with a sealing material in the state which the partition pressed the 1st board | substrate.

  In the display device according to the second aspect, preferably, the partition wall of the second substrate has a notch for ventilation. According to this configuration, the region formed by the partition wall is connected to the region formed by the adjacent partition wall by the ventilation notch, so that the first substrate and the second substrate are sealed with the sealing material. Intake and exhaust of a space (discharge space) formed by wearing can be performed by one vent.

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

  FIG. 1 is a plan view showing an overall configuration of a plasma display device according to an embodiment of the present invention. FIG. 2 is a perspective view of a main part of the plasma display device according to the embodiment shown in FIG. FIG. 3 is a plan view showing a back substrate of the plasma display device according to the embodiment shown in FIG. 4 to 8 are cross-sectional views for explaining the detailed structure of the plasma display device according to the embodiment shown in FIG. First, the structure of a plasma display device according to an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a case where the present invention is applied to a plasma display device which is an example of a display device will be described.

  As shown in FIGS. 1 to 3, the plasma display device 1 according to the present embodiment includes a front substrate 2, a back substrate 3, and a sealing material 4. The front substrate 2 is an example of the “first substrate” in the present invention, and the back substrate 3 is an example of the “second substrate” in the present invention.

As shown in FIG. 2, the front substrate 2 includes a glass substrate 21, a display electrode pair 22, a dielectric layer 23, and a protective layer 24. Further, the display electrode pair 22 of the front substrate 2 includes two display electrodes 22 a and 22 b each having a transparent electrode 221 and a bus electrode 222. Further, as shown in FIG. 8, a plurality of display electrode pairs 22 are provided at predetermined intervals in the arrow Y direction. The transparent electrodes 221 of the display electrodes 22a and 22b are made of a transparent and conductive metal oxide such as SnO ₂ or ITO, and extend on the lower surface of the glass substrate 21 so as to extend in the arrow X direction (see FIG. 2). Is arranged. The bus electrodes 222 of the display electrodes 22a and 22b have a three-layer structure of Cr—Cu—Cr, and are disposed on the surface of the transparent electrode 221 so as to extend in the arrow X direction (see FIG. 2). The dielectric layer 23 of the front substrate 2 is made of glass, and is formed on the lower surface of the glass substrate 21 so as to cover the display electrodes 22a and 22b. The protective layer 24 of the front substrate 2 is made of a metal oxide film such as MgO, and is provided so as to cover the surface of the dielectric layer 23.

In the present embodiment, as shown in FIG. 2, the back substrate 3 includes a glass substrate 31, an address electrode 32, a dielectric layer 33, a partition wall 34, and a phosphor 35. The address electrode 32 of the rear substrate 3 is made of Ag and is provided on the upper surface of the glass substrate 31 so as to extend in the arrow Y direction. A plurality of address electrodes 32 are provided in the direction of arrow X (see FIG. 2) with a predetermined interval (about 200 μm to about 300 μm). The dielectric layer 33 of the rear substrate 3 is made of glass and is provided on the upper surface of the glass substrate 31 so as to cover the address electrodes 32. Further, as shown in FIG. 4, the partition wall 34 of the back substrate 3 has a height of H1 (about 100 μm) and a width of about 100 μm, and extends in the direction of arrow Y (see FIG. 2). It is provided on the upper surface. In addition, the partition wall 34 is made of glass, and a plurality of the partition walls 34 are provided at predetermined intervals (about 200 μm to about 300 μm) in the arrow X direction (see FIG. 2). Further, as shown in FIG. 2, the partition wall 34 is formed with a ventilation notch 34a having a depth of about 20 μm and a width of about 20 μm. Further, as shown in FIG. 2, the phosphor 35 of the back substrate 3 includes a red phosphor 35a, a green phosphor 35b, and a blue phosphor 35c. Further, as shown in FIG. 2, each of the phosphors 35 a, 35 b, and 35 c is provided so as to extend in the arrow Y direction in the region formed by the partition wall 34. The red phosphor 35a is formed of (Y, Gd) BO ₃ : Eu ³⁺ , the green phosphor 35b is formed of ZN ₂ SiO ₄ : Mn, and the blue phosphor 35c is BaMgAl ₁₄ O ₂₃ : Eu. ²⁺ .

  Here, in this embodiment, as shown in FIGS. 3 to 6, the sealing material 4 is arranged in a quadrangular shape when viewed in plan along the outer periphery of the back substrate 3. Further, as shown in FIG. 4, the sealing material 4 has a height H2 (about 70 μm to about 80 μm) smaller than the height H1 (about 100 μm) of the partition wall 34. The sealing material 4 is made of glass having a melting point lower than those of the glass substrates 21 and 31, the dielectric layers 23 and 33, and the partition walls 34. The sealing material 4 has a function of forming the discharge space 50 (see FIGS. 7 and 8) by sealing the front substrate 2 and the rear substrate 3. Further, in the discharge space 50 formed by the front substrate 2, the back substrate 3, and the sealing material 4, a mixed gas of Ne and Xe is sealed at a predetermined pressure from a not-shown vent hole.

  7 and 8, when the front substrate 2 and the rear substrate 3 are sealed with the sealing material 4, the ends of the front substrate 2 on the X direction and Y direction sides are on the rear substrate 3 side. The front substrate 2 and the back substrate 3 are sealed by the sealing material 4 by bending the plate to the side. Thus, the partition wall 34 having a height H1 (about 100 μm) larger than the height H2 (about 70 μm to about 80 μm) of the sealing material 4 is sealed in a state where the front substrate 2 is pressed in the direction of arrow Z in FIG. Has been.

  In the present embodiment, as described above, the front substrate 2 is formed by making the height H2 (about 70 μm to about 80 μm) of the sealing material 4 smaller than the height H1 (about 100 μm) of the partition wall 34 of the back substrate 3. In the state where the back substrate 3 is sealed with the sealing material 4, the partition wall 34 of the back substrate 3 presses the front substrate 2 in the arrow Z direction (see FIG. 7). Accordingly, the partition wall 34 presses the front substrate 2 in the direction of arrow Z (see FIG. 7) even in a place where the atmospheric pressure is low, such as a high altitude. be able to. Therefore, since it can suppress that the front substrate 2 vibrates at the time of a drive, it can suppress that noise generate | occur | produces. In addition, unlike the case where the partition wall and the first substrate are bonded by the bonding material, it is not necessary to separately provide the bonding material, so that an increase in the number of components can be suppressed. As a result, it is possible to suppress the occurrence of noise even in a place with a low atmospheric pressure such as a high altitude while suppressing an increase in the number of parts.

  In the present embodiment, the front substrate 2 and the rear substrate 3 are sealed by the sealing material 4 in a state where the partition wall 34 of the rear substrate 3 presses the front substrate 2 in the arrow Z direction (see FIG. 7). With such a configuration, it is possible to easily suppress the generation of a gap between the partition wall 34 and the front substrate 2 even in a place with a low atmospheric pressure such as a high altitude.

  Further, in the present embodiment, the height H2 (about 70 μm to about 80 μm) of the sealing material 4 is set in the X direction and Y direction ends of the front substrate 2 with the partition wall 34 in contact with the front substrate 2. By setting the height H2 (about 70 μm to about 80 μm) at which the front substrate 2 and the rear substrate 3 can be sealed by bending the portion, the partition wall 34 can easily move the front substrate 2 in the direction of arrow Z. The front substrate 2 and the back substrate 3 can be sealed with the sealing material 4 in a state of being pressed (see FIG. 7).

  In the present embodiment, the partition wall 34 of the back substrate 3 is configured to have a ventilation notch 34a, so that the region formed by the partition wall 34 is adjacent to the ventilation notch 34a. 34 is connected to the region formed by 34, and therefore, a single vent is used for intake and exhaust of a space (discharge space) formed by sealing the front substrate 2 and the rear substrate 3 with the sealing material 4. (Not shown).

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and all modifications within the meaning and scope equivalent to the scope of claims for patent are included.

  For example, in the above embodiment, the plasma display device is shown as an example of the display device. However, the present invention is not limited to this, and the present invention can be applied to display devices other than the plasma display device as long as the display device includes a partition wall. is there.

  Further, in the above embodiment, the partition wall is notched so that the region formed by the partition wall is connected to the region formed by the adjacent partition wall so as to allow ventilation, but the present invention is not limited to this. First, as in the first modification shown in FIG. 9, the partition 34 is formed so that both ends 34 b and 34 c have a predetermined distance from the sealing material 4, so that the region formed by the partition 34 is adjacent. You may comprise so that the area | region formed of the partition 34 may be connected so that ventilation | gas_flowing is possible.

  Moreover, in the said embodiment, it provided so that the area | region formed with the partition could be connected with the area | region formed with the adjacent partition so that ventilation | gas_flowing was possible by providing one notch for ventilation | gas_flowing in each partition. However, the present invention is not limited to this, and the second modification shown in FIG. 10 or the third modification shown in FIG. 11 may be configured. Specifically, as in the second modification shown in FIG. 10, by providing a plurality of notches 34a in the partition wall 34, the region formed by the partition wall 34 can be ventilated with the region formed by the adjacent partition wall 34. You may comprise so that it may be connected to. Further, as in the third modified example shown in FIG. 11, the partition wall 34 is formed by the partition wall 34 by alternately providing a plurality of notches 34d having a depth D1 and notches 34e having a depth D2. Alternatively, the region may be configured to be connected to the region formed by the adjacent partition wall 34 so as to allow ventilation.

  In the above-described embodiment, an example in which a mixed gas of Ne and Xe is sealed in the discharge space at a predetermined pressure has been described. You may make it enclose with.

1 is a plan view showing an overall configuration of a plasma display device according to an embodiment of the present invention. It is a principal part perspective view of the plasma display apparatus by one Embodiment shown in FIG. FIG. 2 is a plan view showing a back substrate of the plasma display device according to the embodiment shown in FIG. 1. FIG. 4 is a cross-sectional view taken along the line 100-100 in FIG. FIG. 4 is a cross-sectional view taken along line 200-200 in FIG. 3. FIG. 4 is a cross-sectional view taken along line 300-300 in FIG. 3. FIG. 4 is a cross-sectional view taken along line 400-400 in FIG. FIG. 5 is a cross-sectional view taken along the line 500-500 in FIG. It is sectional drawing which showed the plasma display apparatus by the 1st modification of one Embodiment of this invention. It is sectional drawing which showed the back substrate of the plasma display apparatus by the 2nd modification of one Embodiment of this invention. It is sectional drawing which showed the back substrate of the plasma display apparatus by the 3rd modification of one Embodiment of this invention.

Explanation of symbols

1 Plasma display device (display device)
2 Front substrate (first substrate)
3 Back substrate (second substrate)
4 Sealing material 21, 31 Glass substrate 34 Partition 34a Notch

Claims (5)

In a display device comprising: a first substrate; a second substrate provided with a partition wall having a first height; and a sealing material that seals the first substrate and the second substrate;
The sealing material has a second height smaller than the first height of the partition walls of the second substrate;
In a state where the partition of the second substrate presses the first substrate, the first substrate and the second substrate are sealed by the sealing material,
The first substrate and the second substrate include a glass substrate,
The second height of the sealing material can seal the first substrate and the second substrate by bending the glass substrate in a state where the partition wall is in contact with the glass substrate. Set to a height,
The partition wall of the second substrate has a notch for ventilation. A first substrate;
A second substrate provided with a partition wall having a first height;
A display device comprising: a sealing material that seals the first substrate and the second substrate and has a second height smaller than a first height of a partition wall of the second substrate.   The display device according to claim 2, wherein the first substrate and the second substrate are sealed by the sealing material in a state where the partition walls of the second substrate press the first substrate. The first substrate and the second substrate include a glass substrate,
The second height of the sealing material can seal the first substrate and the second substrate by bending the glass substrate in a state where the partition wall is in contact with the glass substrate. The display device according to claim 2, wherein the display device is set to a high height.   The display device according to claim 2, wherein the partition wall of the second substrate has a notch for ventilation.

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