KR100626013B1 - Structure for damping vibration in circuit board and display module having the same - Google Patents

Abstract

Disclosure of Invention An object of the present invention is to provide a vibration preventing structure capable of absorbing vibration caused by electromagnetic force generated on a driving circuit board while the display panel is operating, thereby preventing the printed circuit board and the chassis base from vibrating and generating noise. In order to achieve the above object, in the present invention, a base plate, a plurality of bosses provided on the base plate and having fastening holes formed therein for coupling with a fastening means thereon, the upper ends of the plurality of bosses A circuit board disposed substantially parallel to the base plate, the circuit board having fastening holes corresponding to the fastening holes formed in the boss, a copper reducer coupled to at least one of the portions in which the boss and the circuit board are in contact, and the boss and the circuit board. Including a fastening means for coupling It provides a damped structure of the circuit board and a display module having the same.

Description

Structure for damping vibration in circuit board and display module having the same}

1 is a perspective view of an example of a conventional display module.

2 is a side view of a driving circuit board installed in a conventional display module.

3 is a view for explaining an anti-vibration structure according to the present invention.

Figure 4 is a perspective view of a copper reducer used in the vibration preventing structure according to the present invention.

Explanation of symbols on the main parts of the drawings

10: Chassis 11: Chassis Base

12: reinforcing member 20: connecting cable

40: drive circuit board 41: boss

42: nut 43a, 43b: component part

50: display panel 51: front substrate

52: rear substrate 60: copper reducer

61: fastening portion 62: connecting bar

63: mass

The present invention relates to an anti-vibration structure of a driving circuit board and a display module having the same, and more particularly, noise in the fastening portion of the driving circuit board due to electromagnetic force generated during operation of elements installed on the driving circuit board. The present invention relates to an anti-vibration structure and a display module having the same, which prevents vibration from being transmitted to the chassis base through the fastening portion.

1 is a perspective view illustrating an example of a display module used in a plasma display device.

As shown in FIG. 1, a display module used in a plasma display apparatus includes a display panel 50, a driving circuit board made of circuits for driving the display panel 50, and a driving circuit with the display panel 50. And a chassis 10 supporting the substrate.

The display panel 50 is made by bonding the front substrate 51 and the rear substrate 52 to each other, and is electrically connected to the driving circuit boards by the connection cable 20.

2 is a diagram illustrating an example of a driving circuit board constituting the display module.

As shown in FIG. 2, the driving circuit board 40 includes various elements 43a and 43b constituting the driving circuit on the printed circuit board PCB. In addition, it is common to install the boss 41 on the chassis base 11 and to fix the driving circuit board 40 to the chassis base by using the screw 42.

While the plasma display panel including the driving circuit board 40 is in operation, electromagnetic forces generated by switching currents in device components, resistors, and capacitors of a printed board assembly (PBA) are applied. The printed circuit board is transmitted, and the printed circuit board vibrates to generate noise.

Then, the vibration is transmitted to the chassis base 11 as it is along the fastening portion using the boss 41 and the screw 42. Conventionally, in order to reduce such vibrations, each device component is changed to a vibration reducing device, but when the device component is changed, it adversely affects the image quality of the entire display device. Often not. In addition, when replacing the vibration-reducing device component, there is a problem that the manufacturing cost is increased because the cost of the devices is relatively expensive.

The present invention is to solve the above problems, an object of the present invention is to absorb the vibration caused by the electromagnetic force generated on the driving circuit board during the operation of the display panel vibration of the printed circuit board and the chassis base and noise It is to provide an anti-vibration structure and a display module having the same that can be prevented from generating.

In order to achieve the above object, in the present invention; A circuit board disposed substantially parallel to the base plate; Fastening means for fixing the circuit board on the base plate; And a copper reducer coupled to at least one of the fastening means in contact with the circuit board.

Here, the copper reducer, a mass; A fastening part installed at one side to allow the fastening means to be coupled to the driving circuit board; And it is preferable to include a connecting bar for connecting the fastening portion and the mass.

Here, the circuit board is preferably provided with a power transformer, FET or IPM on the upper surface.

In addition, in the present invention, a display module including a display panel, a driving circuit board for driving the display panel, and a chassis base for supporting the display panel and the driving circuit board, wherein the chassis base and the driving circuit board are substantially different from each other. Fastening means disposed in parallel to each other and fixing the driving circuit board to the chassis base between the chassis base and the driving circuit board; And a copper reducer installed at at least one of the fastening means and the portion where the circuit board is in contact with each other.

Here, the copper reducer, a mass; A fastening part installed at one side to allow the fastening means to be coupled to the driving circuit board; And a connecting bar connecting the fastening part and the mass body, and the display panel has a greater effect when the display panel is a plasma display panel.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the same member as the member described in the prior art, the same member number is used in describing the embodiment of the present invention below.

Figure 3 is a view showing a vibration preventing structure according to the present invention, Figure 4 is a perspective view of a copper reducer used in the vibration preventing structure of Figure 3 is shown.

As shown in FIG. 3, the anti-vibration structure according to the present invention includes a base plate 11, a circuit board 40, a fastening means and a copper reducer 60.

The circuit board 40 is disposed thereon substantially parallel to the base plate 11. The fastening means includes a plurality of bosses 41 installed on the base plate 11 and having fastening holes formed thereon, and fastening members 42 fastened to the bosses to couple the circuit boards. The fastening member is preferably a screw or rivet.

As shown in FIG. 4, the copper reducer 60 is coupled to at least one of the portions in which the boss 41 and the circuit board 40 contact each other, and the copper reducer 60 has a mass 63 and one side. Is installed in the fastening means includes a fastening portion 61 to be coupled to the driving circuit board and a connecting bar 62 for connecting the fastening portion 61 and the mass (63).

That is, when the printed circuit board 40 is fastened to the base plate 11 by using the boss 41 and the fastening member (screw) 42, the boss 41 installed on the base plate 11 and the Insert a separate copper reducer 60 between the screws 42 and fasten. In this way, before the vibration generated in the printed circuit board 40 is transmitted to the chassis base 11, the vibration is transmitted to the copper reducer 60 so that the copper reducer 60 itself vibrates so that the chassis base 11 may be vibrated. ) Is not transmitted or the vibration transmitted is reduced. Thus, the radioactive noise generated as vibration is transmitted to the chassis base 11 can be reduced to 28 db or less, which is a design target.

On the other hand, the anti-vibration structure described so far is caused by the vibration of the chassis base when used in a display module including a display panel, a drive circuit board for driving the display panel, and a chassis base for supporting the display panel and the drive circuit board. It is effective in reducing noise. That is, the effect is great when the base plate is a chassis base used for the display module.

In addition, the vibration damping effect is greater when the display panel is a plasma display panel. In other words, in order to apply voltage to the address electrode and the sustain discharge electrode, elements that need to be frequently switched, such as a voltage transformer, a field effect transistor (FET) device, or an intelligent power module (IPM), are installed on the driving circuit board. When the anti-vibration structure according to the present invention is applied to the driving circuit board of the plasma display panel, the effect is very large.

In addition, since the device components used in the driving circuit board of the plasma display panel have vibration characteristics of various frequency bands, they must be designed to match the vibration weak frequency band of the driving circuit board when designing the copper reducer. This is possible by appropriately adjusting the length (l) of the connecting bar and the mass (M) of the mass in the copper reducer structure as shown in FIG. 4.

In addition, in the case where it is difficult to compensate all of the weak frequency bands with only one copper reducer, a wide range of weak frequency bands can be compensated by fastening the dynamic absorbers having different characteristics to different points among the screw fastening portions formed on the driving circuit board substrate. have.

According to the anti-vibration structure of the present invention as described above, electromagnetic force is generated by the switching operation of the elements installed on the circuit board, even if this force causes vibration on the circuit board and the base plate to generate noise. By blocking the noise, the generation of noise can be greatly reduced.

In addition, when the vibration preventing structure according to the present invention is applied to a display module having a plasma display panel, the vibration reduction effect is greater.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (6)

Base plate; A circuit board disposed substantially parallel to the base plate; Fastening means for fixing the circuit board on the base plate; And And a copper reducer coupled to at least one of the fastening means in contact with the circuit board. The method of claim 1, The copper reducer, Mass; A fastening part installed at one side to allow the fastening means to be coupled to the driving circuit board; And And a connecting bar connecting the fastening part and the mass body. The method of claim 1, The circuit board is a vibration preventing structure of the circuit board, characterized in that the power transformer, FET or IPM is installed on the upper surface. A display module comprising a display panel, a driving circuit board for driving the display panel, and a chassis base for supporting the display panel and the driving circuit board. The chassis base and the driving circuit board are disposed substantially parallel to each other, Fastening means for fixing the drive circuit board to the chassis base between the chassis base and the drive circuit board; And And a copper reducer provided at at least one of the portions where the fastening means and the circuit board are in contact with each other. The method of claim 4, wherein The copper reducer, Mass; A fastening part installed at one side to allow the fastening means to be coupled to the driving circuit board; And Display module characterized in that it comprises a connecting bar for connecting the fastening portion and the mass. The method of claim 4, wherein And the display panel is a plasma display panel.

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