JP2004020998A - Plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display device wherein a circuit unit having an electronic circuit constituted is easily fixed. <P>SOLUTION: The plasma display device has a display driving circuit block which is arranged on a chassis member having a plasma display panel attached thereto and applies a signal to the plasma display panel to perform display, an enclosure in which the plasma display panel and the display driving circuit block are stored, and a block body 37 which is detachably attached through an attachment hole 33 opened to the outside of the enclosure and is attachably and detachably connected to the display driving circuit block, and the block body 37 is provided with a grip part 48, and the grip part 48 is provided with a locking recessed part which can freely detachably be locked by a locking piece 49 provided on the enclosure side, and the locking recessed part of the grip part 48 is locked by the locking piece 49 with the block body 37 attached to the attachment hole 33, so that the block body 37 can easily be fixed in the main body. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plasma display device known as a display device.
[0002]
[Prior art]
Generally, in this type of plasma display device, an ultraviolet ray is generated by gas discharge, and the phosphor is excited by the ultraviolet ray to emit light, thereby performing color display. Then, a display cell partitioned by a partition is provided on the substrate, and a phosphor layer is formed on the display cell.
[0003]
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 types, a surface discharge type and a counter discharge type. At present, the mainstream of plasma display devices is a surface discharge type having a three-electrode structure, which has a pair of display electrodes adjacent to each other in parallel on one substrate, and a structure on the other substrate. It has address electrodes arranged in a direction intersecting with the display electrodes, partition walls, and a phosphor layer, so that the phosphor layer can be made relatively thick, which is suitable for color display by the phosphor.
[0004]
First, the structure of the plasma display panel in the plasma display device will be described with reference to FIG. As shown in FIG. 7, on a transparent front substrate 1 such as a glass substrate, a plurality of rows of stripe-shaped display electrodes 2 formed of scan electrodes and sustain electrodes are formed, and cover the electrode group. A dielectric layer 3 is formed as described above, and a protective film 4 is formed on the dielectric layer 3.
[0005]
A plurality of rows of stripes covered with an overcoat layer 6 are provided on a rear substrate 5 opposed to the front substrate 1 so as to intersect with the display electrodes 2 of scan electrodes and sustain electrodes. Address electrodes 7 are formed. A plurality of partitions 8 are arranged on the overcoat layer 6 between the address electrodes 7 in parallel with the address electrodes 7, and the phosphor layers 9 are provided on the side surfaces between the partitions 8 and on the surface of the overcoat layer 6. I have.
[0006]
The substrate 1 and the substrate 5 are opposed to each other with a minute discharge space therebetween so that the display electrode 2 of the scan electrode and the sustain electrode and the address electrode 7 are substantially orthogonal to each other, and the periphery thereof is sealed. In the discharge space, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas. The discharge space is partitioned into a plurality of partitions by partition walls 8, so that a plurality of discharge cells are provided at intersections between the display electrodes 2 and the address electrodes 7, and each of the discharge cells has a red, green, and blue color. The phosphor layers 9 are sequentially arranged for each color such that
[0007]
FIG. 8 shows an electrode arrangement of this plasma display panel. As shown in FIG. 8, the scan electrodes, the sustain electrodes, and the address electrodes have a matrix configuration of M rows × N columns, and M rows × N columns are arranged in the row direction. Scan electrodes SCN1 to SCNM and sustain electrodes SUS1 to SUSM are arranged, and N columns of address electrodes D1 to DN are arranged in the column direction.
[0008]
In the plasma display panel having such an electrode configuration, an address discharge is performed between the address electrode and the scan electrode by applying a write pulse between the address electrode and the scan electrode, and after selecting a discharge cell, the scan electrode A sustain discharge is performed between the scan electrode and the sustain electrode by applying a periodic sustain pulse that is alternately inverted between the scan electrode and the sustain electrode, thereby performing a predetermined display.
[0009]
Such a plasma display device is capable of high-speed display as compared with a liquid crystal panel, has a wide viewing angle, is easy to increase in size, and has a high display quality because it is a self-luminous type. Recently, flat panel displays have attracted particular attention, and have been used for various purposes as display devices at places where many people gather and display devices for enjoying large-screen images at home.
[0010]
On the other hand, a plasma display device is used as a large-sized display device for various purposes, and therefore, a signal input terminal structure outputs a video signal including various information signals such as a personal computer, a television tuner, and a video. A configuration that can be connected to external devices is required.
[0011]
For this reason, in the plasma display device, various signal input terminals are provided so as to be inevitably connectable to many external signal sources, but from a general user side, all signal input terminals are used. Such usage is small, and most of them are used by connecting only a specific external device. Therefore, some of the various signal input terminals provided so as to be compatible with various devices may not be necessary.
[0012]
Also, a plurality of types of plasma display devices having signal input terminals according to the user may be manufactured, but in the case of plasma display devices used for various applications as described above, unless various types of products are produced, And production efficiency deteriorates.
[0013]
[Problems to be solved by the invention]
Conventionally, in a plasma display device having a signal input terminal structure corresponding to the purpose of use of a user, when a circuit unit having an electronic circuit is set in a main body, a screw is used to fix the circuit unit. And there is a problem that it takes time and effort to use a tool such as a screwdriver. In addition, if the number of places where the screws are tightened increases, the labor increases, and similarly, when setting a plurality of circuit units in the main body, the labor increases.
[0014]
The present invention has been made in view of such circumstances, and has as its object to provide a plasma display device that can easily fix a circuit unit including an electronic circuit.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a circuit unit having an electronic circuit, wherein a handle is provided, and the handle is detachably engageable with an engaging piece provided on the housing side on the handle. And the locking portion of the handle portion is locked to the locking piece in a state where the circuit unit is mounted in the mounting opening.
[0016]
With this configuration, in particular, when a plurality of types of circuit units corresponding to external devices connected to the display device are prepared, or when a plurality of circuit units are set in the main body, the handle unit is operated. The circuit unit can be easily locked with the circuit unit mounted in the main body alone, so that the set time in the mass production process can be reduced, and the removal and installation time when replacing parts can be reduced.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the invention according to claim 1 of the present invention is a display drive circuit block that is arranged on a chassis member to which a plasma display panel is attached and applies a signal to the plasma display panel to perform display, A circuit housing that houses a display drive circuit block, and a circuit unit that is detachably mounted through a mounting opening opened to the outside of the housing and that is detachably connected to the display drive circuit block; A handle portion is provided on the unit, and a locking portion is provided on the handle portion so as to be detachably lockable on a locking piece provided on the housing side. Since the stopper is configured to be locked to the locking piece, the circuit unit can be easily fixed in the main body.
[0018]
According to a second aspect of the present invention, a handle is rotatably supported on the circuit unit, and the locking portion is locked to the locking piece by rotating the handle toward the housing. With such a configuration, the handle portion can be prevented from protruding from the main body.
[0019]
In the invention according to claim 3 of the present invention, the holding position of the handle portion is substantially on the extension of the center of gravity of the circuit unit, so that the circuit unit can be easily carried.
[0020]
In the invention according to claim 4 of the present invention, the circuit unit is provided with a connection terminal portion for connecting to an external device, and the handle portion is held at a position shifted from the position of the connection terminal portion, thereby holding the handle portion. Sometimes, it is possible to make it difficult for the handle to contact the connection terminal.
[0021]
The invention according to claim 5 of the present invention is such that the handle portion is fixed in a state where the handle portion is rotated to the housing side and the locking portion is locked to the locking piece, so that the handle portion can be easily moved. Can not be.
[0022]
Hereinafter, a plasma display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6, but the embodiment of the present invention is not limited to this.
[0023]
FIG. 1 shows an example of the overall configuration of a plasma display device according to an embodiment of the present invention. In the drawing, a housing for accommodating a panel 10 is composed of a front frame 11 and a metal back cover 12, and an opening of the front frame 11 has a front surface made of glass or the like which also protects the optical filter and the panel 10. A cover 13 is provided. The front cover 13 is coated with, for example, silver to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 12 is provided with a plurality of ventilation holes 12a for releasing heat generated in the panel 10 and the like to the outside.
[0024]
The panel 10 is held by bonding a front surface of a chassis member 14 made of aluminum or the like through a heat conductive sheet 15, and a plurality of circuits for driving the display of the panel 10 are provided on the rear side of the chassis member 14. A block 16 is attached. The heat conductive sheet 15 is for efficiently transmitting the heat generated in the panel 10 to the chassis member 14 and radiating the heat. Further, the circuit block 16 includes an electric circuit for performing display driving of the panel 10 and controlling the same, and the electrode drawing portion drawn to the edge portion of the panel 10 extends beyond the four edge portions of the chassis member 14. It is electrically connected by a plurality of extending flexible wiring boards (not shown).
[0025]
A boss 14a for attaching the circuit block 16 and fixing the back cover 12 is formed on the rear surface of the chassis member 14 by integral molding using die casting or the like. The chassis member 14 may be configured by fixing a fixing pin to an aluminum flat plate.
[0026]
FIG. 2 is a plan view showing the internal arrangement structure of the plasma display device having such a configuration with the back cover 12 removed. In FIG. 2, the scan driver circuit block 20 applies a predetermined signal voltage to the scan electrodes of the panel 10. The sustain driver circuit block 21 supplies a predetermined signal voltage to the sustain electrode of the panel 10, and the address driver circuit block 22 supplies a predetermined signal voltage to the address electrode of the panel 10. The sustain driver circuit blocks 21 are disposed at both ends in the width direction of the chassis member 14, and the address driver circuit blocks 22 are disposed at the upper end and the lower end of the chassis member 14 in the height direction.
[0027]
The control circuit block 23 converts image data into a panel based on a video signal sent from an input signal circuit block 24 having an input terminal section to which a connection cable for connecting to an external device such as a television tuner is detachably connected. The image data signal is converted into an image data signal corresponding to the number of pixels of 10 and supplied to the address driver circuit block 22, and a discharge control timing signal is generated and supplied to the scan driver circuit block 20 and the sustain driver circuit block 21, respectively. It performs display drive control such as control, and is disposed substantially at the center of the chassis member 14.
[0028]
The power supply block 25 supplies a voltage to each of the circuit blocks. Like the control circuit block 23, the power supply block 25 is disposed substantially at the center of the chassis member 14, and includes a connector 26 to which a power supply cable (not shown) is attached. A commercial power supply voltage is supplied through a power supply input block 27 having the same.
[0029]
The bracket 28 is mounted on a stand pole, and is attached to a position of a lower end portion of the chassis member 14 in the height direction. The stand is attached by inserting the tip of the stand pole attached to the stationary stand into the hole of the bracket 28 and fixing the stand pole to the bracket 28 with screws or the like, whereby the panel is held upright. It will be.
[0030]
The flexible wiring board 29 connects the lead-out portion of the scan electrode and the sustain electrode of the panel 10 to the printed wiring board of the scan driver circuit block 20 and the sustain driver circuit block 21. The flexible wiring board 30 is connected to the address electrode of the panel 10. It connects the electrode lead-out portion and the printed wiring board of the address driver circuit block 22, and is arranged so as to be bent 180 degrees from the front side to the back side through the outer peripheral portion of the panel 10.
[0031]
FIGS. 3 and 4 show the configuration of the control circuit block 23 and the input signal circuit block 24. These parts will be described in detail below.
[0032]
The circuit board 31 of the control circuit block 23 is mounted with a microcomputer, a driver IC, an electric circuit component, and the like that constitute the above-described predetermined control circuit, and the control circuit block 23 is configured by this. A signal input connector 32 is disposed at an end of the circuit board 31.
[0033]
As shown in FIGS. 3 and 4, the input signal circuit block 24 is provided on the chassis member 14 and has a case member 34 having a mounting port 33 provided to open to the outside from the back cover 12 of the housing. A signal output connector 35 is detachably attached to the case member 34 from the attachment port 33 and detachably connected to the connector 32 of the control circuit block 23 by being attached to the case member 34, and is connected to an external device. And a first block main body 37 which is a circuit unit having an input terminal 36 as a connection terminal portion to which a connection cable for connection is detachably connected.
[0034]
Further, another second block main body 39 having an input terminal 38 to which a connection cable for connecting to another external device such as a tuner or a personal computer is detachably connected is built in the case member 34, The connector 32 for signal output is always connected to the connector 32 of the control circuit block 23. In FIG. 3, the case member 34 is omitted, and in FIG. 4, the input terminal 36 and the block body 39 are omitted.
[0035]
The case member 34 is formed by bending a metal plate, and a fixing piece 41 having a hole 41a through which a screw for attaching to the chassis member 14 penetrates is provided at an arbitrary position on a surface on the chassis member 14 side. An opening 42 in which the input terminal 38 of the block body 39 built in the above-described mounting port 33 and the case member 34 is disposed is provided on a surface that rises substantially at a right angle from the surface to be attached to the chassis member 14. The formed terminal arrangement part 43 is provided. Then, the case member 34 is attached to the chassis member 14 with the terminal arrangement portion 43 exposed to the outside through an opening (not shown) provided in the back cover 12.
[0036]
The block main body 37 includes a circuit board 44 on which components such as ICs and electronic circuit components constituting an input signal circuit are mounted, and a component mounted on the upper surface of the circuit board 44 and constituting the input signal circuit, being electromagnetically coupled. And a shield plate 46 attached to the lower surface of the circuit board 44 for electromagnetically shielding components constituting the input signal circuit.
[0037]
Further, a terminal of the connector 35 is electrically connected and fixed to a rear surface side of the circuit board 44, and a terminal connection electrically connected to the circuit board 44 is provided to a front side of the circuit board 44. A terminal plate 47 having a plurality of holes 47a is attached so that the input terminal 36 as a part penetrates and protrudes. The handle 48 is turned on the terminal plate 47 of the block body 37 so that the holding position is displaced from the position of the input terminal 36 of the connection terminal section substantially on the extension of the center of gravity of the block body 37. The case member 34 is provided so as to be pivotally supported, and has, on both sides of the mounting port 33 of the case member 34, a projection 49a with which the handle portion 48 is locked in a state where the block body 37 is mounted in the mounting port 33. A locking piece 49 is provided.
[0038]
5 and 6 show the configuration of the handle portion 48 and the terminal plate 47. FIG. The handle portion 48 is locked and fixed to a rotation shaft 50 for rotatably supporting the handle portion 48 itself and projections 49 a of locking pieces 49 on both sides of the mounting opening 33 of the case member 34. A locking concave portion 51 serving as a locking portion is provided coaxially. Around the locking concave portion 51, a hooking portion 52 for hooking on the projection 49a and the projection 49a are provided on the locking concave portion 51. A guide port 53 for guiding is formed. The terminal plate 47 is provided with a rotation fixing piece 54 having a rotation hole 54a into which the rotation shaft 50 is inserted.
[0039]
With this configuration, when the block main body 37 is mounted on the case member 34, as shown in FIG. 6, the handle portion 48 is positioned substantially at right angles to the terminal plate 47, If the projection 49 a is guided to the guide port 53, the projection 49 a is inserted into the locking recess 51. Thus, the block body 37 is inserted into the case member 34, that is, the plasma display device.
[0040]
Next, if the handle portion 48 is rotated in the direction A shown in FIG. 6, even if the block body 37 is pulled out from the case member 34 in this state, the projection 49a is hooked on the hook portion 52. And cannot be pulled out. Thus, the block body 37 is fixed in the case member 34, that is, in the plasma display device.
[0041]
Here, although not shown, a structure is adopted in which the handle portion 48 is rotated to the housing side and the locking concave portion 51 is locked to the locking piece 49, and the grip portion 48 is fixed with a screw. In addition, the handle portion 48 cannot be easily moved, so that, for example, when an impact is applied to the plasma display device, the block body 37 can be prevented from easily coming off the plasma display device.
[0042]
【The invention's effect】
As described above, according to the present invention, the circuit unit can be easily locked to the mounting port in a state where the circuit unit is inserted into the main body only by operating the handle, thereby shortening the set time in the mass production process and replacing the part. It is possible to reduce the time required for removing and attaching.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an overall configuration of a plasma display device according to an embodiment of the present invention. FIG. 2 is a plan view showing an internal arrangement structure of the plasma display device. FIG. FIG. 4 is an exploded perspective view showing the configuration of the signal circuit block portion. FIG. 5 is a perspective view showing the configuration of a handle portion and a terminal plate of the input signal circuit block portion. FIG. FIG. 7 is a side view of a main part after a combination of a handle part and a terminal plate. FIG. 7 is a perspective view showing a schematic configuration of a panel of the plasma display apparatus. FIG. 8 is an explanatory view showing an electrode arrangement of the panel of the plasma display apparatus. Description]
10 Panel 14 Chassis member 23 Control circuit block 24 Input signal circuit block 33 Mounting port 34 Case member 36 Input terminal 37 Block body 47 Terminal plate 48 Handle 49 Locking piece 50 Rotating shaft 51 Locking recess 52 Hook 53 Guide mouth

Claims (5)

A display drive circuit block disposed on a chassis member to which the plasma display panel is attached and applying a signal to the plasma display panel to perform display, a housing accommodating the plasma display panel and the display drive circuit block, A circuit unit detachably mounted from a mounting opening opened to the outside of the housing and detachably connected to the display drive circuit block, and a handle portion is provided on the circuit unit, and the handle portion includes A locking portion detachably provided on a locking piece provided on the housing side is provided, and the locking portion of the handle portion is locked to the locking piece in a state where the circuit unit is mounted in the mounting opening. A plasma display device comprising: The handle unit is rotatably supported on the circuit unit, and the locking unit is locked to the locking piece by rotating the grip unit toward the housing. 2. The plasma display device according to 1. 2. The plasma display device according to claim 1, wherein the handle is held at a position substantially on an extension of the center of gravity of the circuit unit. 2. The plasma display device according to claim 1, wherein a connection terminal portion for connecting to an external device is provided in the circuit unit, and a holding position of the handle portion is shifted from a position of the connection terminal portion. 3. The plasma display device according to claim 2, wherein the handle is fixed in a state where the handle is rotated toward the housing and the locking portion is locked to the locking piece.

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