Supports – Stand and bracket – Having adjustable bracket
Reexamination Certificate
1996-03-22
2001-04-17
Ramirez, Ramon O. (Department: 3632)
Supports
Stand and bracket
Having adjustable bracket
C248S917000, C248S292130, C248S121000
Reexamination Certificate
active
06216989
ABSTRACT:
FIELD OF THE INVENTION AND RELATED ART
The present invention relates to a support structure capable obviating adverse effects of electromagnetic waves emitted from and incident to electronic apparatus or devices, and a display apparatus equipped with the support structure.
The present invention also relates to a support structure including a tilting mechanism for tiltably supporting a body to be supported, such as a display unit, and also a display apparatus including the support structure such that a display unit can be vertically tilted and laterally turned without losing stability.
In recent years, there have been remarkably developed electronic devices utilizing electromagnetic wave, such as portable telephones. Accordingly, electromagnetic waves (radiation interference waves) radiated from electronic devices has been causing electromagnetic and electric wave difficulties on surrounding apparatus. For this reason, it is required to pay attention to electromagnetic compatibility (EMC) of an apparatus or system so that it is free from an electromagnetic environmental condition and free from an adverse effect to other apparatus so as not to cause performance deterioration or mal-function.
The EMC measures include a reduction of electromagnetic interference (EMI) inclusive of unnecessary radiation of unnecessary electromagnetic signals or electromagnetic noise causing performance deterioration, mal-function or failure of electronic apparatus, and immunity from electromagnetic susceptibility (EMS) of normally operating even if the electronic apparatus receives electromagnetic interference from other apparatus.
In Japan, it has become obligatory to reduce the radiation interference wave emitted from an electronic apparatus to below a prescribed level according to VCCI standards. In the United States and Europe, FCC standards and ES standards stipulate similar obligations, respectively.
Radiation interference waves exceeding the prescribed level is generally given by a harmonic component issued from an electronic circuit having a high clock pulse frequency, and only a portion of the frequency range of the harmonic exceeds the prescribed level. Accordingly, if a measure is taken to reduce the amount of the frequency exceeding the limit to below a certain low level, the radiation interference wave can be economically and effectively suppressed.
On the other hand, flat displays, such as a liquid crystal display apparatus have been rapidly developed, and the size thereof is being gradually enlarged. It has been a recent trend to support a large-area flat display apparatus by a lateral H-shaped or a reverse T-shaped metal support structure of metal material in view of factors, such as restrictions in designing and mechanical structure and for economical reasons.
However, such an ordinary stand support structure for electronic apparatus can be resonant with a certain frequency of radiation interference waves to amplify the radiation interference wave.
On the other hand, as a support structure for a display apparatus for a personal computer or word processors, there has been known a type including a tilting mechanism for adjusting a vertical inclination angle of a display unit, whereby a display screen or surface of a display unit such as a CRT or a liquid crystal panel can assume not only an upright position but also a vertically inclined (tilted) position.
A display apparatus is generally composed of a display unit having a display screen or surface and a support structure supporting the display unit. Tilting mechanisms are generally disposed between the display unit and the support structure and at positions in a manner of projecting laterally (i.e., leftward and rightward) out of the display unit to be recognizable from an operator side. The left and right tilting mechanisms are disposed to have an imaginary tilting axis which couples them and pierces the display unit laterally. An operator can tilt the display unit about the tilting axis and stably hold the display unit at a desired tilted angle. Thus, an operator can set the display screen at an arbitrary angle easy for recognition to have a better recognizability of characters or images on the display screen, e.g., by lightly pushing or pulling an upper end portion on the front face of the display unit. For example, in case where the display screen is given by a liquid crystal panel, the recognizability of the display can be remarkably affected by an angle for viewing the display screen, so that such a tilting mechanism is important.
In recent years there is a trend of requiring a larger area display unit, whereas a support structure as an accessory device for the display unit is required to be further smaller in size. This means that the necessary unit is large enough, but the other member is minimized within a possible extent, e.g., so as to reduce an area on a desk occupied by the display apparatus.
In the above-mentioned display apparatus, however, as the tilting mechanisms disposed at the left and right sides project leftward and outward, respectively, out of the sides of the display unit, it is difficult to further reduce the lateral width of the support structure alone and also of the whole display apparatus.
As a solution to the above-difficulty, it may be conceived of to move the left and right tilting mechanisms from the lateral sides to the back of the display unit. By this measure, it is possible to hide the tilting mechanisms from the viewing field of a display apparatus operator and provide a better design appearance. As a result of the above measure, however, the tilting axis is moved rearward along with the tilting mechanism, a large distance occurs between the gravity center and the tilting axis to provide a different or uneasy touch during the tilting operation. That is, in the operation for tilting the display unit, the tilting operation in the direction of the display unit weight is easy or light but the tilting in the opposite direction is heavy. More specifically, in the case where the tilting axis is shifted rearward from the gravity center of the display unit, the tilting is performed easily, i.e., at a light force, by pulling an upper front position of the display unit toward the operator side to direct the display screen downward, but a heavy force is required in the opposite tilting operation of pushing the upper front position away from the operator to direct the display screen upward. In case where the upward and downward tilting operations require too large a difference in operation force, the operator can assume it as a trouble or failure. The uneasy touch during the tilting operation can be a serious problem in a trend of requiring a larger display unit.
Among such display apparatus, there are some apparatus wherein the tilting or turning center of the display unit and the gravity center of the display apparatus are horizontally deviated from each other. In such display apparatus, when the display unit is vertically tilted up and down, the gravity center is moved forward and backward and also up and down.
In such display apparatus, when the gravity center goes out of an effective support region formed by a setting surface on which the support base is disposed, the display apparatus is caused to fall down. This difficulty becomes more serious in view of the above-mentioned requirement for a smaller support structure.
On the other hand, some display apparatus include a support structure allowing leftward and rightward lateral turning of the display unit. Further, some display apparatus include a display unit having a weight and a size exceeding those of the stand and post member of the support structure. In this case, when the display unit is laterally turned particularly in combination with a vertical tilting, the gravity center of the display apparatus is liable to be moved. Also, in this case, when the gravity center of the display unit is moved out of an effective supporting region formed by a setting surface on which the support base is disposed, the display apparatus is caused to fall down.
Ac
Hoshino Osamu
Itazawa Toshiaki
Miyamoto Takao
Miyazaki Toyohide
Shioya Yasushi
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Ramirez Ramon O.
Wood Kimberly
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