JP2003084679A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively construct a front protective member for a plasma display device which has both impact resistance and an optical property. SOLUTION: The plasma display device includes a panel main body 10 in which a pair of substrates having at least a transparent front surface side are oppositely disposed to form a discharge space between the substrates, and an electrode group is arranged on the pair of substrates to form a plurality of discharge cells, a chassis member 14 holding the panel main body 10 from a rear side surface, and a tabular front cover 13 arranged to cover the front surface side of the panel main body 10 and having an optical filter. The dimensions of the front cover 13 are configured to be smaller than those of the panel main body 10 and greater than the display region of the panel main body 10.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a large screen, thin type,
The present invention relates to a plasma display device known as a lightweight display device.

[0002]

2. Description of the Related Art This plasma display device is roughly classified into an AC type and a DC type in terms of driving, and there are two types of discharge type: a surface discharge type and a counter discharge type.
At present, the mainstream of the plasma display device is a surface discharge type having a three-electrode structure because of the increase in screen size and the ease of manufacturing.

In this surface discharge type panel structure, a pair of substrates, at least the front side of which are transparent, are arranged opposite to each other so that a discharge space is formed between the substrates, and a partition wall for partitioning the discharge space into a plurality of substrates is formed on the substrate. A plurality of discharge cells are arranged by arranging and arranging an electrode group on the substrate so that discharge is generated in the discharge space partitioned by the partition wall, and by providing phosphors that emit red, green, and blue that emit light by discharge. The fluorescent material is excited by vacuum ultraviolet light having a short wavelength generated by discharge, and red, green, and blue visible lights are emitted from the red, green, and blue discharge cells, respectively, to perform color display.

Such a plasma display device is
Among the flat panel displays, it is possible to display at a higher speed than a liquid crystal panel, has a wide viewing angle, is easy to upsize, and has a high display quality due to its self-luminous type. It has been particularly attracting attention and is used for various purposes as a display device in a place where many people gather and as a display device for enjoying a large-screen image at home.

[0005]

In such a plasma display device, the panel body having glass as the main material is attached to the holding plate made of metal such as aluminum, and the like.
In addition to interposing a heat conductive sheet, acrylic type,
It was adhered and fixed using a double-sided adhesive material made of urethane-based or silicon-based material. Further, on the front surface side of the panel body, a front glass having an optical filter provided on tempered glass is arranged with a predetermined space.

By the way, in this plasma display device, since the front glass is arranged with a space of 3 mm to 8 mm provided between the front glass and the panel main body, reflection occurs on both the front surface of the panel main body and the front glass to cause multiplex. The reflection image is reflected in the display screen, making it difficult to see. For this reason, the antireflection film is formed on each glass surface by sputtering or dipping, or a sputtered film is attached to reduce the reflection as much as possible.

However, since this antireflection film is expensive, the structure in which the front glass is removed and the optical filter is directly attached to the panel body is disclosed in JP-A-2000-1123.
As disclosed in Japanese Patent Laid-Open No. 93-93, a configuration in which a space is filled with transparent silicon to eliminate the space, or as disclosed in Japanese Patent Laid-Open No. 2001-13877, an optical filter is directly attached to the panel surface, and Japanese Patent Laid-Open No. 2001-2001. As shown in Japanese Patent Publication No. 19925, a configuration in which an optical function member is directly attached to a panel with a heat and light curing adhesive is considered.

The present invention solves such a problem, and an object thereof is to provide a plasma display device having a front surface protecting member having both impact resistance and optical characteristics.

[0009]

In order to achieve the above-mentioned object, a plasma display device of the present invention has a pair of substrates, at least the front side of which are transparent, arranged opposite to each other so that a discharge space is formed between the substrates. A panel body in which a plurality of discharge cells are formed by arranging an electrode group on a substrate, a holding plate that holds the panel body from the back surface, and a flat plate shape that is arranged so as to cover the front surface side of the panel body and has an optical filter And an impact protection member, the impact protection member being configured to be smaller than the outer dimensions of the panel body and larger than the display area of the panel body.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, according to the invention described in claim 1 of the present invention, a pair of substrates, at least front side of which are transparent, are arranged so as to face each other so that a discharge space is formed between the substrates, and electrodes are arranged on the pair of substrates. A panel main body in which a plurality of discharge cells are formed by arranging groups, a holding plate for holding the panel main body from the back side, and a flat plate-like impact protection arranged so as to cover the front side of the panel main body and having an optical filter And a member that is smaller than the outer dimensions of the panel body and larger than the display area of the panel body.

Further, in the present invention, the impact protection member has a soft sheet on the side attached to the surface of the panel body and a hard sheet on the outside. Also,
The thickness of soft sheet and hard sheet is 0.5mm ~
It is set to 2 mm. Further, the soft sheet is composed of an elastic material and an adhesive material.

A plasma display device according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 7, but the embodiment of the present invention is not limited to this.

First, the structure of the plasma display panel in the plasma display device will be described with reference to FIG. As shown in FIG. 1, a plurality of stripe-shaped display electrodes 2 forming pairs of scan electrodes and sustain electrodes are formed on a transparent front substrate 1 such as a glass substrate and cover the electrode group. Thus, the dielectric layer 3 is formed, and the protective film 4 is formed on the dielectric layer 3.

A plurality of columns covered with an overcoat layer 6 are formed on the rear substrate 5 facing the front substrate 1 so as to intersect the display electrodes 2 of the scan electrodes and the sustain electrodes. Stripe-shaped address electrodes 7 are formed. A plurality of partition walls 8 are arranged on the overcoat layer 6 between the address electrodes 7 in parallel with the address electrodes 7, and a phosphor layer 9 is provided on a side surface between the partition walls 8 and a surface of the overcoat layer 6. There is.

The substrate 1 and the substrate 5 are a display electrode 2 and an address electrode 7 which are scan electrodes and sustain electrodes.
Are arranged so as to be substantially orthogonal to each other, and are opposed to each other with a minute discharge space interposed therebetween, and the periphery is sealed, and one kind of helium, neon, argon, and xenon or a mixed gas is discharged into the discharge space. It is enclosed as a gas. Further, the discharge space is partitioned into a plurality of partitions by partition walls 8 to provide a plurality of discharge cells at which the intersections of the display electrodes 2 and the address electrodes 7 are located, and each of the discharge cells has red, green, and blue. The phosphor layers 9 are sequentially arranged for each color so that

FIG. 2 shows the electrode arrangement of this plasma display panel. As shown in FIG. 2, the scan electrodes, the sustain electrodes and the address electrodes have a matrix structure of M rows × N columns, and in the row direction. M rows of scan electrodes SCN1 to SCNM and sustain electrodes SUS1 to
Address electrodes D1 of N columns in which the SUSMs are arranged in the column direction
~ DN are arranged.

In the plasma display panel having such an electrode structure, by applying a write pulse between the address electrode and the scan electrode, address discharge is performed between the address electrode and the scan electrode, and after selecting a discharge cell. , Between the scan electrode and the sustain electrode,
By applying a periodic sustain pulse that is alternately inverted, a sustain discharge is generated between the scan electrode and the sustain electrode, and a predetermined display is performed.

FIG. 3 shows an overall structure of a plasma display device according to an embodiment of the present invention, which incorporates the panel having the above-described structure, FIG. 4 shows a state of the panel portion viewed from the front side, and FIG. FIG. 6 shows the structure of the main part, and FIG. 6 shows an enlarged view of part A of FIG. In the figure, a housing for accommodating the panel body 10 is composed of a front frame 11 and a metal back cover 12, and the front frame 11 has a size smaller than the outer dimensions of the panel body 10 and is small.
An opening 11a larger than the display area is provided.

A front cover 13, which is a flat plate-shaped impact protection member having an optical filter, is arranged on the front surface side of the panel body 10 by being attached so as to cover the front surface side of the panel body 10. The cover 13 is exposed from the opening 11a of the front frame 11. As shown in FIG. 4, the front cover 13 is smaller than the outer dimensions of the panel body 10 and larger than the display area 10a of the panel body 10, and further the inner peripheral portion of the opening 11a of the front frame 11. The structure is larger than the size.

The front cover 13 is provided with an unnecessary radiation suppressing film for suppressing unnecessary radiation of electromagnetic waves due to vapor deposition of silver or the like. Further, the back cover 12 is provided with a plurality of ventilation holes 12a for radiating heat generated in the panel body 10 and the like to the outside.

The panel body 10 is the panel body 1
On the front surface of a chassis member 14 made of aluminum or the like as a holding plate that holds 0 from the back surface, a sheet 15 that is a porous elastic member having thermal conductivity and elasticity, such as silicone foam rubber or urethane foam rubber, is interposed. A plurality of circuit blocks 16 for driving the panel body 10 to perform display are attached to the rear surface side of the chassis member 14 by being adhered. Sheet 15
Is for efficiently transmitting the heat generated in the panel body 10 to the chassis member 14 and radiating the heat.

The circuit block 16 is provided with an electric circuit for driving and controlling the display of the panel body 10, and the electrode lead-out portion led out to the edge of the panel body 10 has four sides of the chassis member 14. Are electrically connected by a plurality of flexible wiring boards (not shown) extending beyond the edges of the.

On the rear surface of the chassis member 14, a boss portion 14a for attaching the circuit block 16 and fixing the back cover 12 is provided by projecting integrally by die casting or the like. The chassis member 14
May be constructed by fixing a fixing pin to an aluminum flat plate.

Further, as shown in FIG. 5, a mounting member 20 into which a pole portion 19 of a stand 18 for holding the plasma display device in an upright state is inserted is attached to the chassis member 14.

Here, the front cover 13 arranged by being attached so as to cover the front surface side of the panel body 10.
Is a polyurethane-based, acrylic-based,
It is configured by combining a soft sheet 21 made of a transparent material such as silicon and a hard sheet 22 made of polycarbonate (PC), polyethylene terephthalate (PET), polymethylmethacrylate (PMMA) or the like. The front cover 13 has a structure in which the side attached to the surface of the panel body 10 is the soft sheet 21 and the hard sheet 22 is arranged on the outer side, and the thicknesses of the soft sheet 21 and the hard sheet 22 are 0. It is set to 5 mm to 2 mm. Further, the soft sheet 21 is composed of an elastic material 21a and an adhesive material 21b.

In FIG. 6, the spacer 11b is for closing the gap formed between the front frame 11 and the front cover 13, and dust and dirt enter the inside through the opening 11a of the front frame 11. Is to prevent.

By the way, in the conventional method of protecting the panel body 10 with the front glass, since there is a space between the panel body 10 and the front glass, the heat of the panel body 10 should be directly conducted to the outermost front glass. Although the temperature rise is low, the configuration in which the front cover 13 is directly attached to the surface of the panel body 10 as in the present invention causes the heat generated by the panel body 10 to be directly transmitted to the front cover 13. It is necessary to improve the heat dissipation effect and lower the surface temperature than the front glass method so that it is safe to touch with hands.

With respect to this point, in the present invention, the panel body 10 is adhered and held to the chassis member 14 as a holding plate through the sheet 15 which is a porous elastic member having heat conductivity, and the panel is held. The area in which the main body 10 is in close contact with the chassis member 14 is increased compared to the conventional case, and as a result, the heat generated in the panel main body 10 can be efficiently transferred to the chassis member 14 to be dissipated. It can be lowered, and a configuration in which the front cover 13 is directly attached to the panel body 10 can be adopted.

Further, in the present invention, the panel body 10
Since the front cover 13 that also functions as an optical filter to be directly attached to the front cover 13 is configured by combining a soft sheet and a hard sheet, when the front cover 13 is impacted, the impact force is dispersed by the soft sheet 21 and the panel is The impact is less likely to be directly transmitted to the main body 10, whereby the same impact resistance as that of the conventional windshield can be secured.

7 to 9 show examples of the front cover of the plasma display device according to another embodiment of the present invention.

First, in the structure of the front cover shown in FIG. 7, the hard sheet 22 made of a resin plate such as polycarbonate (PC), polyethylene terephthalate (PET), polymethylmethacrylate (PMMA), etc. is used as a soft sheet to absorb elastic shock. It is arranged by adhering it to the panel body 10 with an adhesive material 23 having.

The structure of the front cover shown in FIG. 8 is composed of polycarbonate (PC), polyethylene terephthalate (PE
T), a film-shaped optical filter 24 is laminated on a hard sheet 22 made of a resin plate such as polymethylmethacrylate (PMMA) so as to be arranged, and is bonded as a soft sheet having impact absorbing elasticity. It is arranged by being attached to the panel body 10 with the material 23.

The structure of the front cover shown in FIG. 9 is composed of polycarbonate (PC), polyethylene terephthalate (PE
T), a film-shaped optical filter 24 is superposed on a hard sheet 22 made of a resin plate such as polymethylmethacrylate (PMMA) via an adhesive 23 having a shock absorbing elasticity as a soft sheet. And is attached to the panel main body 10 with the adhesive 25 to arrange.

As described above, the present invention includes the flat plate-shaped front cover 13 which is arranged so as to cover the front surface side of the panel body 10 and has an optical filter, and the front cover 13 has the outer shape of the panel body 10. It is smaller than the size and larger than the display area of the panel body 10, and the front cover 13 is directly attached to the panel body 10.
Even when the arrangement position of the front cover 13 is slightly displaced when arranging, the front cover 13 does not protrude from the panel body 10, and the assembling work can be easily performed.

[0035]

As is apparent from the above description, according to the plasma display device of the present invention, it is possible to attach the impact protection member, which also serves as an optical filter directly attached to the panel body, to the panel body with good workability. Is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a panel of a plasma display device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an electrode array of a panel of the plasma display device.

FIG. 3 is an exploded perspective view showing an internal arrangement structure of the plasma display device.

FIG. 4 is a plan view of the panel portion of the plasma display device seen from the front side.

FIG. 5 is a side view showing a main structure of the plasma display device.

FIG. 6 is an enlarged sectional view showing part A of FIG.

FIG. 7 is a cross-sectional view showing another example of the front cover of the plasma display device.

FIG. 8 is a cross-sectional view showing another example of the front cover of the plasma display device.

FIG. 9 is a cross-sectional view showing another example of the front cover of the plasma display device.

[Explanation of symbols] 10 panel body 10a display area 11 Front frame 12 back cover 13 Front cover 14 Chassis member 21 Soft sheet 22 Hard sheet

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01J 11/02 H01J 11/02 E H04N 5/66 101 H04N 5/66 101A (72) Inventor Shozo Sasaki Osaka Prefecture Kadoma City 1006 Kadoma, Matsushita Electric Industrial Co., Ltd. F-term (reference) 5G435 AA01 AA09 AA17 BB06 CC09 CC12 GG11 GG43 HH03 HH18 KK07

Claims (4)

[Claims] 1. A panel main body in which a plurality of discharge cells are formed by arranging a pair of substrates, at least front side of which are transparent, facing each other so that a discharge space is formed between the substrates and arranging an electrode group on the pair of substrates. A holding plate that holds the panel body from the back side, and a flat plate-shaped impact protection member that is arranged so as to cover the front surface side of the panel body and has an optical filter, and the impact protection member is the external dimensions of the panel body. A plasma display device, which is smaller and larger than the display area of the panel body. 2. The plasma according to claim 1, wherein the impact protection member is configured by combining a soft sheet and a hard sheet, the panel body side is made a soft sheet, and the hard sheet is arranged on the outer side. Display device. 3. The plasma display device according to claim 2, wherein the thickness of each of the soft sheet and the hard sheet is set to 0.5 mm to 2 mm. 4. The plasma display device according to claim 2, wherein the soft sheet is composed of an elastic material and an adhesive material.