MXPA96005343A - Audio induced interference suppression apparatus for video display appliances - Google Patents

Abstract

EXHIBICION DE VIDEO An audio induced interference suppression apparatus for a video display appliance capable of suppressing an audio induced interference which may be produced in a color picture tube (CPT) due to the transfer of vibrations arising from the output of a loudspeaker by absorbing and dampening the vibrations to be transferred to the CPT. The apparatus includes a color picture tube (CPT) of main body of the video display appliance, a cabinet assembled on the front of the CPT, a back cover assembled with the cabinet by being secured to the rear of the CPT, loudspeaker cases, installed on both sides of the CPT with a fastening hole, for producing audio signal, a vibration-absorbing plate, coupled to a bottom of the CPT and back cover for absorbing vibrations generated and propagated from the loudspeaker case to the CPT.

Description

AUDIO INDUCED INTERFERENCE SUPPRESSION APPARATUS FOR APA VIDEO DISPLAY RATES BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the suppression of an audio-induced interference for video display apparatus. In particular, the present invention relates to an apparatus for suppressing the audio-induced interference that may occur in a color picture tube due to the transfer of vibrations arising from the output of a loudspeaker provided in a loudspeaker box directly adjacent to the color image tube absorbing and dampening the vibrations generated from the loudspeaker. 2. Description of the Prior Art Video display apparatus such as monitors, television receivers, etc., are typically provided with a color picture tube (CPT). These video display apparatus can also be provided with at least one loudspeaker for sound output. Figures 1 to 3 are views illustrating a conventional video display apparatus in an assembled state. Referring to Figures 1 to 3, the conventional video display apparatus comprises a main body 60 provided with a color image tube 1 (CPT), a cabinet 10 -assembled with the CPT1, and a rear cover 20 assembled with cabinet 10 being secured to the back of CPT 1; a tilted ball joint 30 mounted on the lower portion of the main body 60, for adjusting the rotation to the right and left and the upward and downward inclination of the main body 60; and loudspeaker boxes 50, provided on both sides of the main body 60, to support the loudspeaker 40 respectively installed therein. Referring again to Figure 3, the cabinet 10 is provided with CPT holding protrusions 11, formed within the cabinet 10, to be attached to CPT projections 2 formed in a CPT 1 by fastening screws 3A, and projections 12 of rear cover bracket projected from the internal sides of the cabinet 10, so as to be secured to a rear cover 20. The rear cover 20 is provided with fastening holes 21 formed on both sides of the rear cover 20 -to secure the loudspeaker boxes 50 to the rear cover 20 by fastening screws 34B that pass through it, and cabinet fastening bosses 22 projected from the inner sides of the rear cover 20 so as to be secured to the rear cover fastening bosses 12 by fastening screws 3C. The loudspeaker box 50 is provided with internal and external walls 51 and 52 to surround the loudspeaker 40, through holes 53 formed in the loudspeaker box 50, to adjust with the securing holes 21 for securing the box 50 of loudspeaker to the rear cover 20 by fastening screws 3B, the loudspeaker fastening protuberances 54 projected from the inner side of the loudspeaker box 50 -to fix the loudspeaker 40 thereto by 3D holding screws, and loudspeaker grilles 55 provided on the front of the loudspeaker box 50 to pass through it the sound to which the loudspeaker 40 is output. In the drawing, the number 56 denotes an internal cover holding hole. In accordance with the conventional video display apparatus as constructed above, the CPT projections 2 projected from both sides of the CPT 1 coincide with and are attached to the CPT holding protrusions 11 projected from the interior of the cabinet 10 by the screws 3A of clamping resulting in the cabinet 10 being assembled on the front of the CPT 1. Next, the gimbarrier fastening projections 22 projecting from both internal sides of the cover 20 -possum coincide with and fasten to the protrusions 12 of the rear cover bracket projected from both internal sides of the cabinet 10 by means of the fixing screws 3C, so that the rear cover 20 in whose lower part the tilting ball joint 30 is mounted is fastened to the cabinet, covering the rear portion of the CPT 1. Meanwhile, the loudspeaker 40 coincides with and is fastened to the holding protuberances 54. loudspeakers projected from the inner side 51 of the loudspeaker box 50 by means of the 3D fastening screws, so that the loudspeaker 40 is fixed inside the loudspeaker box 50. At this time, after the loudspeaker boxes 50 on which the loudspeakers 40 are respectively fixed are brought into contact with both sides of the cover 20 and the cabinet 10 assembled to the CPT 1, the retaining holes formed on both sides of the rear cover 20 coincide with the through holes 53 formed through the inner and outer surfaces 51 and 52 of the loudspeaker case 50, a retaining screw 3B is inserted towards and secured to the hole -21 and the through hole 53, so that the cabinet 10, the rear cover 20, and the loudspeaker box 50 are completely assembled together as shown in Figure 2. When the conventional video display apparatus -as is shown in FIG. builds up works, the video information is displayed in the CPT 1 and an audio signal of the loudspeaker 40 has -output through the loudspeaker grille 55 provided in the front of the loudspeaker box 50 nte. At this time, the vibrations corresponding to the level of the output audio signal are produced from the loudspeaker 40 and transferred directly to the CPT 1. The tilting ball 30 adjusts the rotation to the right and left and tilt up and down the main body 60 of the video display apparatus. However, the tilting ball joint 30 can not serve as a vibration absorption or reduction device. The vibrations produced from the loudspeaker 40 as shown in Figure 3 are transferred to the loudspeaker holding boss 54 through the screw 30 which is attached to the loudspeaker holding boss 54 projected from the loudspeaker box 50. to fix the loudspeaker 40 thereto, and then they are transferred to the screw 3E clamped through the through hole 53 through the outer surface 52 of the loudspeaker box 50. Next, the vibrations that have reached the screw 3E secured through the through hole 56 of the loudspeaker box 50 pass through the internal side surface 51 and are transferred to the screw 3B through the contacted surface (portion "C"). "of Figure 3) of the back cover 20 and loudspeaker box 50 and / or through the screw 3B clamped through the holding hole 21 of the back cover 20 and the through hole 53 of the loudspeaker box 50. The vibrations that have arrived to the rear cover 20 are transferred to the cabinet 10 through the screw 3C fixed to the rear cover fastening boss 12 projected from both sides of the cabinet 10 and the boss 22 of the cabinet holder in FIG. both sides of the rear cover 20, and then along the contacted surface (portion "B" of Figure 3) of the cabinet 10 and the rear cover 20 assembled together. The vibrations transferred to the cabinet 10 are then transferred to the CPT projection 2 through the screw 3B attached to the CPT holding boss 11 and reach a shadow mask provided in the CPT, which passes through the contacted surface (portion "A" of Figure 3) of CPT 1 and gab_j_ nete 10. At this moment, three electronic beams for colors - red, green and blue, which are emitted from electronic cannons of CPT 1, are directed to the screen Fluorescent of the CPT1 a - through the beam passage openings provided in the shadow mask. The electronic beams are affected by the vibrations transferred to the shadow mask, and in this way the interference, that is, the squealing phenomenon occurs on the CPT 1 screen. The interference deteriorates the image quality and easily fatigue the user's eyes. In addition, it limits the scale of the CPT screen and the output level of the speaker.

COMPENDIUM OF THE INVENTION The present invention was made to solve the problems involved in the prior art. Therefore, an object of the present invention is to provide an audio-induced interference suppression apparatus for a video display apparatus that can absorb and completely dampen vibrations transferred from the speaker and thus eliminate the interference produced in a tube. of color image. In order to achieve the above object, an audio induced interference suppression apparatus is provided for a video display apparatus comprising: a main body of a color picture tube; a vibration absorption element, coupled to a - background of the main body, to absorb generated vibrations - and propagated from a loudspeaker to the main body; support elements, coupled to a bottom of the vibration absorbing element, for supporting the main body; tilt and rotation adjustment elements, coupled to and in spherical contact with a bottom of the support element, for adjusting the inclination and rotation of the main body; and loudspeaker boxes installed on both sides of the main body and fixed to both sides of the support element.

BRIEF DESCRIPTION OF THE DRAWINGS The above objects, other features, and advantages of the present invention will become more. evident through the following description of the preferred embodiments of the present invention made with reference to the accompanying drawings, in which: Figure 1 is a detailed perspective view of a conventional video display apparatus in which they are installed. loudspeaker sides. Figure 2 is a front view of the conventional video display apparatus of Figure 1. Figure 3 is a sectional view of the conventional video display apparatus of Figure 1. Figure 4 is a detailed perspective view of the apparatus of interference suppression for a video display apparatus in accordance with one embodiment of the present invention. Figure 5 is a front view of the interference suppression apparatus for a video display apparatus of Figure 4; Figures 6A to 6C are sectional views illustrating major parts of the interference suppression apparatus according to the present invention; invention. Figure 7 is a front view of the interference suppression apparatus for a video display apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES Figures 4 to 7 show the modalities of the presejí te invention. Referring to Figure 4, the audio-induced interference suppression system in accordance with the present invention includes a CPT main body 200 as well as a CPT 100, a cabinet 101 assembled on the front of the CPT 100, and a rear cover 102 assembled with the cabinet 101 being secured to the rear of the CPT 100, the rear cover 102 having a plurality of fastening holes formed in its bottom; a vibration absorbing plate 106, fixed to the bottom of the main body 200, for absorbing the vibration components to be transferred to the main body 200; a support 107, fixed to the bottom of the vibration absorption plate 106, to support the main body 200, a swivel 108, assembled with and in spherical contact with the bottom of the support 107, to act as a device for tilt and rotation adjuster for adjusting the rotation to the right and left and the upward and downward inclination of the main body 200; and a speaker case 104 provided on both sides of the main body 200, and fixed to both side portions of the support 107. Preferably, the main body 200, the vibration absorbing plate 106, and the support 107 are hermetically secured together being clamped by a clamping device such as a plurality of screws 113A passing through the support 107 and the vibration absorbing plate 106 and fastened to the clamping holes 103 formed in the bottom of the main body 200. Between the head portion of the screw 113A and the lower surface of the support members 111 vibration dampers are inserted, such as rubber packaging. Likewise, the loudspeaker box 104 is fixed to the support 107 in such a way that a fastening device such as a screw 113B which passes through and is fastened to the fixing hole 105 formed in the loudspeaker box 104 and the hole 109 p Is formed on both sides of the support 107. Between the head portion of the screw 113B and the adjacent external surface of the loudspeaker case 104, and between both sides of the support 107 and the adjacent inner surface of the loudspeaker case 104, the members 112 and 110 - of vibration damping, such as rubber gaskets, are respectively inserted. Here, the vibration absorbing plate 106 is provided with an adhesive tape 114 for adhesively securing the plate 106 to the upper surface of the support 107 and a plurality of through holes 115 formed in the plate 106 to pass the screws 113A and 113C through thereof. After the support 107 is firmly fixed to the lower surface of the vignetting absorption plate 106, on which the through holes 115 are formed, by the adhesive tape 114, the lower surface of the support 107 is mounted on the tilt knee 108 Next, as shown in FIG. 6C, a screw 113C is fixed to the mounting mounting hole 109 of the tilt ball 108, penetrating the through hole 115 of the plate 106 and the tilt ball clamping bore 117. -formed in the central portion of the support 107, causing the plate 106, the support 107, and the tilt head 108 to be -completely assembled together. Meanwhile, plate 106, support 107, and. the tilting ball joint 108, which are assembled together, are fixed to the lower portions of the cabinet 101 and the rear cover 102 that are assembled with the CPT 100, and then secured thereto by the screw 113A as shown in the figure 6B in such a manner that the screw 113A, through the rubber gasket 111, is attached to the holding hole 103 formed in the lower part of the rear cover 102 through the holding hole 118 of the support 107 and the through hole 115 of the vibration abso- tion plate 106, causing the cabinet 101, the rear cover 102, the vibration absorbing plate 106, the support 107 and the tilting ball joint 108 to be completely assembled together. Next, as shown in Figure 6A, the rubber pack 110 is inserted into the holder hole 116 of the loudspeaker box formed on each side of the bracket 107, the loudspeaker box 104 is brought into contact with the CPT. 100 completely assembled, and then the holding hole 105 formed in the lower portion of the loudspeaker box 104 is placed over the rubber gasket 110 inserted into the loudspeaker box opening 116. Next, the screw 113B is secured to the loudspeaker box holding hole 116 through the rubber gasket 110 and the holding hole 105. Figure 5 shows the -a video display device in a fully assembled state. When the video display apparatus assembled as above operates, the vibrations generated and proposed from the loudspeaker installed in the loudspeaker box 10 are first absorbed through the rubber gasket 112 which fits into the hole 105. fastening formed at the bottom of the loudspeaker case 104 and the rubber gasket 110 fixed firmly on each side of the support 107. The remaining vibrations that have reached the support 107 are then transferred to the back cover 102 of the body -primary after They have been absorbed and damped in second place through the vibration absorption plate 106 fixed to the upper surface of the support 107, and the rubber gasket 111 secured through the holding hole 118 of the support 107 by the screw 113A. The vibrations that have reached the rear cover 102 are then transferred to the cabinet 101. However, the remaining vibrations that have reached the cabinet 101 are almost extinguished by the rubber gaskets 110, 111 and 112, and the vibration absorption pip-ca 106 as described above, and do not - affect the operation of the assembled CPT 100 with the cabinet 101 and the back cover 102, preventing the interference, that is, the squealing phenomenon, occurring in the CPT 100. Figure 7 illustrates the audio-induced interference suppression apparatus for a video display apparatus in accordance with another embodiment of the present invention. Referring to Figure 7, the support 7 and the tilt knee 108 are omitted, and the vibration absorbing plate 106 is fixed to the bottom of the video display apparatus, so that the apparatus is placed directly on a desk or a table-work when in use. the same effect can be achieved as in the modality previously described. From the foregoing, it will be apparent that the present audio-induced interference suppression apparatus provides the advantages in that it can effectively absorb and damp the vibrations generated from the loudspeaker output and thereby eliminate the interference produced in the CPT by the transfer of the vibrations directly to the CPT, thus improving the quality of iamgen. Even though the present invention has been described and illustrated herein with reference to the preferred embodiments thereof, it will be understood by those skilled in the art-that various changes in form and detail may be made therein without abandoning the spirit and scope of the invention.

Claims (10)

1. - An audio-induced interference suppression apparatus for a video display apparatus, comprising: a main body of a color picture tube; a vibration absorbing element, coupled to a bottom of the main body, for absorbing the vibrations generated and propagated from a loudspeaker to the main body; a support element, coupled to a bottom of the vibration abosrción element, to support the main body; an inclination and rotation adjustment element, coupled to and in spherical contact with a bottom of the support element, for adjusting the inclination and rotation of the main body; and loudspeaker boxes installed on both sides of the main body, and fixed on both sides of the support element,

2. - An audio induced interference suppression apparatus as claimed in clause 1, wherein the vibration absorbing element comprises a sponge or caul plate.

3. An audio-induced interference suppression apparatus as claimed in the case 1, wherein the main body, the vibration absorption element and the support element are assembled together by means of a first -fixed element secured to a plurality of fixing holes formed in a bottom of the main body through the support element and the vibration absorption element; and wherein a first vibration damping element is inserted between a head portion of the first fastening element and an infeed surface of the support element.

4. An audio induced interference suppression apparatus as claimed in the case 3, wherein the first fixing element comprises fixing screws.

5. An audio-induced interference suppression apparatus as claimed in the case 3, wherein the first vibration damping element comprises rubber gaskets.

6. An audio-induced interference suppression apparatus as claimed in clause 1, wherein the loudspeaker boxes are fixed to the support element and a second fastening element secured to the fixing holes -formed on both sides of the support element through the loudspeaker boxes; and wherein a second vibration damping element is inserted between a head portion of the second fastening element and an external surface of the loudspeaker box, and between the side of the foot guard element and a surface-box light. loudspeaker, respectively.

7. An audio-induced interference suppression apparatus as claimed in clause 6, wherein the second clamping element comprises fixing screws.

8. An audio-induced interference suppression apparatus as claimed in clause 6, wherein the second vibration damping element comprises rubber gaskets.

9. An audio-induced interference suppression apparatus for a video display apparatus, comprising: a main body of a color picture tube; loudspeaker boxes installed above and fixed to both sides of the main body; and vibration absorption elements, coupled to the main body bottoms and loudspeaker boxes, to absorb vibrations transferred to the main body.

10. An audio-induced interference suppression system as claimed in clause 9, wherein the vibration absorption in clause 9, wherein the vibration absorption element comprises a sponge or rubber plate.