JP2006276790A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of attenuating vibrations on a display picture due to external influences quickly without damaging space saving and superiority of design owned by the display. <P>SOLUTION: The display device 20 performs vibration attenuation by being provided with a damper 30 which has biasing force near a display part. In the damper 30, as the biasing force and resistance force interact, the vibrations can be attenuated quickly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device such as a television or a display used in an environment affected by external vibration.

  2. Description of the Related Art Conventionally, a liquid crystal display device including a liquid crystal panel has been widely used as a display device such as a television or a display. This liquid crystal display device has become thinner and lighter than a CRT display device which has been the mainstream. Therefore, it has a problem that it is easily affected by external vibration.

  In a liquid crystal display device, a simple and inexpensive structure that can absorb external shock and vibration has been proposed (for example, Patent Document 1).

  In order to prevent rattling that occurs during the up-and-down operation of a large-sized display device, a stand incorporating a damper using a resistance force has been proposed (for example, see Patent Document 2).

  As a vehicle-mounted television, a method of reducing the movement of the frame with the force of a spring has been proposed (for example, see Non-Patent Document 1).

JP 2002-268039 A JP 2004-70279 A Japanese Utility Model Publication No. 5-33180

  Conventional liquid crystal display devices do not take measures against vibrations received from the outside. On the other hand, importance is attached to the function of rotating in various directions, and it has come to be installed in many display stands. Therefore, the problem that the component parts and a fastening location increase and it becomes weak to an external vibration has arisen. There are two types of external vibrations, one caused by an external environment such as when a table on which the display device is placed is shaken, and the other caused by an operation such as a user touching the display device (for example, touch operation on a touch panel).

According to the liquid crystal display device of Patent Document 1, it is possible to protect the liquid crystal panel by absorbing external shock and vibration.
However, since it is difficult to see the display screen during actual shaking, it is necessary to forcibly stop the vibration or wait until it stops.

  According to the display device stand of Patent Document 2, it is devised not to move up and down with a light force by the resistance force of the damper, and at the same time plays a role of preventing rattling. In addition, since the lifting mechanism has two fixing portions, it has a structure in which the backlash due to vibration is small.

  In the display device stand of Patent Document 2, a damper is added in order to eliminate rattling in a 40-inch screen class display device. This backlash is generated by having an elevating mechanism, and the damper included as a countermeasure only reduces the backlash caused by the vertical vibration, and it has vibrations having a component in the front-rear direction. There is no damping effect.

  The screen support device of Non-Patent Document 1 also absorbs an impact similarly to Patent Document 1, and does not actively vibrate.

  As liquid crystal display devices become more widespread, performance requirements and usage environments for display devices have become stricter. Strict use conditions include a large liquid crystal display device having a touch panel and a rotatable stand. The touch panel generates vibration when the user touches the screen. Since the rotatable stand can freely change up and down, left and right, and upward and downward on the screen, vibrations are generated when these are operated. In addition, when the generated shaking continues, there is a problem that the screen becomes difficult to see. In a large display device, it tends to be more likely to shake.

  In order to reduce the shaking, if the structural strength is increased, the stand portion becomes larger, which causes a problem that the space saving and the superiority of the design of the liquid crystal display device are impaired. In addition, a design change that increases the strength also causes a problem of cost increase.

  The present invention has found a method for quickly attenuating the vibration of the display device by providing the liquid crystal display device with a damper that absorbs the vibration, and has conceived the present invention.

  Accordingly, an object of the present invention is to provide a display device that quickly attenuates the vibration of the display screen due to external influences.

  In order to achieve the target, the display device according to the first aspect of the present invention is characterized in that vibration is attenuated by providing a damper having a biasing force in the vicinity of the display unit.

  In the display device of the present invention, since the biasing force and the resistance force interact with each other, the vibration can be quickly attenuated as a result.

  A display device according to a second aspect of the present invention has two or more rotating shafts, and includes a damper in the vicinity of the rotating shaft, so that the damper attenuates vibration caused by the operation of the rotating shaft. And

  The vibration of the display device may occur due to the deflection of the component parts and the fastening portion of the rotation mechanism of the display device. The damper is disposed so as to effectively absorb and attenuate this vibration.

  The display device according to the third invention is characterized in that the damper for damping the vibration acts on the two axes of the front and rear direction and the vertical direction of the display screen.

  Since the display screen of the display device protrudes forward, it includes a lot of vibration components in the front-rear direction and the vertical direction. The damper is disposed so as to effectively absorb and damp vibration components in two directions, the front-rear direction and the up-down direction.

  ADVANTAGE OF THE INVENTION According to this invention, in the display apparatus or display apparatus stand which has a rotatable stand structure, the display apparatus or display apparatus stand which can attenuate | dampen the vibration by an external influence quickly can be provided.

  If the display device has a stand structure that can rotate tilt, swivel, and rotation, and the rotation mechanism does not have a damper for vibration damping, it is easily affected by vibration due to external influences. It has become.

  A damper that attenuates vibration is disposed between the display unit and the stand of the display device. This damper is structured to receive a force due to vibration by an urging force and quickly attenuate it by a resistance force applied to the slide rail.

  The urging force is generated by an elastic member (for example, a spring), and the resistance force is generated by frictional resistance, rolling resistance, or viscous resistance. Optimization is carried out by taking into account the balance between the direction of the damper and the biasing force and resistance force. The vibration generated in the display unit of the display device has a three-dimensional movement, but the direction of the damper may be arranged so as to attenuate the largest component among the three-dimensional vibration components. Or you may devise so that it may have a two-way attenuation characteristic with one damper by the arrangement angle of a slide rail.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
1 and 2 are an external front view and a side view of a display device according to the present invention, and an external configuration of the display device will be described based on FIGS. 1 and 2. FIG.
The housing of the display device 20 includes a display unit 22 and a stand unit 24, and the stand unit is provided with a tilt 25, a swivel 26, a rotation 27, an elevating unit 28, and a damper unit 30. .
The display unit 22 can also have a touch panel function that can be used as a user interface (not shown).

3 and 4 are diagrams for explaining the rotation of the display device according to the present invention.
The tilt 25 can rotate the direction of the display unit up and down (see FIG. 3), the swivel 26 can rotate the direction of the display unit left and right (see FIG. 4 (1)), and the rotation 27 Can be rotated vertically and horizontally (see FIG. 4B). Further, the elevating unit 28 can adjust the height of the screen by moving the display unit up and down (see FIG. 4 (3)).

FIG. 5 is a diagram for explaining a damper operation of the display device according to the present invention. Based on FIG. 5, the internal configuration of the damper 30 will be explained.
The damper 30 is provided with a spring 31 and a slide rail 32. The spring 31 is a coil spring and is attached with the fixing member 33 interposed therebetween. The slide rail 32 is attached so as to have resistance with respect to the moving direction of the fixing member. As this resistance, a frictional resistance may be used, but a viscous resistance generated by grease or the like may be used.
In the damper 30, the slide rail 32 and the upper part of the display device 20 (on the display unit 22 side), and the fixing member 33 and the lower part of the display device 20 (on the stand 24 side) are fixed.

  The display unit 22 of the display device 20 is fixed so as to protrude forward with respect to the stand 24. Therefore, the center of gravity is on the front side of the rotation axis. When the center of gravity is on the front side, when the display unit 22 vibrates in the front-rear direction by a touch panel operation, the vibration in the front-rear direction tends to increase. In addition, when vibration in the front-rear direction occurs, vibration in the vertical direction tends to occur at the same time. This is because the movement of the display unit 22 in the front-rear direction has a rotation component, and this rotation component is combined with its own weight to cause vertical vibration.

  When the display unit 22 of the display device 20 according to the present invention vibrates, the slide rail 32 is displaced by the vibration component in the front-rear direction, is attenuated by the urging force of the spring 31, and the resistance between the slide rail 32 and the fixing member 33 is increased. (See FIG. 5).

  In order to obtain better vibration damping, it is preferable to use different dampers in the front-rear direction and the up-down direction. For example, the damper 30a is arranged so as to perform vibration attenuation in the front-rear direction, and the damper 30b is arranged so as to perform vibration attenuation in the vertical direction (see FIG. 6). Further, if the arrangement angle of the damper is devised so that the slide rail 32 and the fixing member 33 can move not only in the longitudinal vibration component but also in the vertical vibration component, one damper can be used for both the longitudinal and vertical directions. A vibration damping effect in the direction is obtained (not shown).

By using the display device of the present invention for a liquid crystal display device, it is possible to quickly attenuate vibrations caused by external influences.
Even if it is a display device other than the liquid crystal display device, the same effect can be obtained by using it for a light and thin display device.

  Further, since external vibration can be attenuated, an effect of protecting the liquid crystal panel from vibration can be expected. In order to reduce vibration in a liquid crystal display device with a large screen, it is necessary to increase the strength of the stand part, and there is a problem that the housing becomes large. However, by using the present invention, the stand part can be reduced in size. Can be Moreover, even if it is a large sized screen, the same effect can be acquired by adding the improvement of this invention to the conventional stand for display apparatuses.

  The present invention has been described with reference to preferred embodiments. The present invention is not limited to this embodiment, and it goes without saying that modifications can be made without departing from the spirit of the invention.

1 is an external front view of a display device according to the present invention. It is an external appearance side view of the display apparatus which concerns on this invention. It is a figure explaining rotation (tilt) of the display apparatus which concerns on this invention. It is a figure explaining rotation (swivel, rotation, raising / lowering) of the display apparatus which concerns on this invention. It is a figure explaining the damper operation | movement of the display apparatus which concerns on this invention. It is a figure (appearance side view) explaining the case where two dampers are used.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Display apparatus 22 Display part 24 Stand 25 Tilt 26 Swivel 27 Rotation 28 Lifting part 30 Damper 30a Damper 30b Damper 31 Spring 32 Slide rail 33 Fixing member

Claims (3)

A display device characterized in that vibration damping is performed by providing a damper having an urging force in the vicinity of the display unit. 2. The display device according to claim 1, wherein the damper has two or more rotating shafts, and the damper is provided with a damper in the vicinity of the rotating shaft, so that the damper attenuates vibration caused by the operation of the rotating shaft. The display device according to 1. 3. The display device according to claim 1, wherein a damper for damping vibrations acts on two axes in the front-rear direction and the vertical direction of the display screen.

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