KR0162971B1 - An apparatus for preventing vibration from picture by speaker output in image displayer - Google Patents
An apparatus for preventing vibration from picture by speaker output in image displayer Download PDFInfo
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- KR0162971B1 KR0162971B1 KR1019950026888A KR19950026888A KR0162971B1 KR 0162971 B1 KR0162971 B1 KR 0162971B1 KR 1019950026888 A KR1019950026888 A KR 1019950026888A KR 19950026888 A KR19950026888 A KR 19950026888A KR 0162971 B1 KR0162971 B1 KR 0162971B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/642—Disposition of sound reproducers
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Abstract
본 발명은 모니터 또는 티브이(TV) 수상기 등의 기기에서, 스피커에서 발생하는 음성신호에 의해서 그 진동이 모니터 또는 티브이 수상기 화면에 전달되어 화면 떨림 현상이 발생하는 것을 방지할 수 있도록 한 영상표시기기의 스피커 출력에 의한 화면 떨림방지 장치에 관한 것이다.The present invention provides a video display device for preventing vibrations from being transmitted to a screen of a monitor or TV receiver by a voice signal generated from a speaker in a device such as a monitor or TV receiver. The present invention relates to a device for preventing screen shake due to speaker output.
종래에는 스피커(6)에서 발생된 진동이 고체 전달을 통해 직접 브라운관(2)으로 전달되기 때문에 심한 하울링 현상이 발생하는 문제점과, 이로 인하여 사용자가 화면을 보고 작업할때 화면 떨림으로 인하여 눈이 쉽게 피로해짐은 물론, 화상이 깨끗하지 못하여 제품의 신뢰성도 저하시키는 등의 문제점이 있다.Conventionally, since the vibration generated from the speaker 6 is directly transmitted to the CRT 2 through the solid transmission, a severe howling phenomenon occurs, and thus, the user easily sees the screen when the user works while watching the screen. Not only fatigue, but also the image is not clean, there is a problem such as lowering the reliability of the product.
본 발명은 스피커의 진동을 완충시키는 수단을 구비하고, 스피커(6)의 진동이 브라운관(2)에 직접 전달되지 않도록 흡수하는 수단과 전달경로를 차단하는 수단을 구비하여 스피커(6)의 진동이 직접 캐비넷(1)을 통해 브라운관(2)에 전달되지 않고, 진동 흡수부(200)와 울림통(300), 메인 브라켓(10)으로 이루어지는 진동 전달 경로상에서 완충, 흡수, 소멸이 이루어 지도록 하므로서, 화면 떨림 현상을 방지할 수 있게 되며, 선명하고 깨끗한 화면을 제공하여 제품의 품질을 높일 수 있음은 물론, 작업자의 눈을 피로하게 하지 않게 할 수 있도록 한 것이다.The present invention includes a means for cushioning the vibration of the speaker, and a means for absorbing the vibration of the speaker 6 is not directly transmitted to the CRT 2 and a means for blocking the transmission path, so that the vibration of the speaker 6 The screen is not directly transmitted to the CRT 2 through the cabinet 1, so that the buffer is absorbed, absorbed, and extinguished on the vibration transmission path consisting of the vibration absorbing unit 200, the ring tub 300, and the main bracket 10. It is possible to prevent shaking and to improve the quality of the product by providing a clear and clean screen, and to prevent the eyes of the worker.
Description
제1도는 종래의 티브이 수상기 브라운관과 스피커의 체결구조를 나타낸 단면도.1 is a cross-sectional view showing a fastening structure of a conventional TV receiver CRT and a speaker.
제2도는 본 발명 영상표시기기의 스피커 출력에 의한 화면 떨림방지 장치의 분해사시도.Figure 2 is an exploded perspective view of the screen shake prevention device by the speaker output of the video display device of the present invention.
제3도는 본 발명 영상표시기기의 스피커 출력에 의한 화면 떨림방지 장치를 적용한 티브이 수상기의 단면도.3 is a cross-sectional view of the TV receiver to which the screen shake prevention device by the speaker output of the video display device of the present invention.
제4도는 본 발명 영상표시기기의 스피커 출력에 의한 화면 떨림방지 장치가 조립된 상태를 보인 상세단면도.Figure 4 is a detailed cross-sectional view showing a state of the screen shake prevention device is assembled by the speaker output of the video display device of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
200 : 진동 흡수부 300 : 울림통200: vibration absorbing part 300: ring
201 : 홀더부 202 : 고정 돌기부201: holder portion 202: fixing projection portion
203 : 탄성흡수부 204 : 체결 고리부203: elastic absorption portion 204: fastening ring portion
205 : 지지리브 301 : 울림 공간부205: support rib 301: ringing space
302 : 체결구멍 303 : 고정돌기부302: fastening hole 303: fixing projection
304 : 결합 돌기부 305 : 리브304: engaging projection 305: rib
306 : 리드선 구멍 307 : 고정공306: lead wire hole 307: fixing hole
308 : 후음 유도부 201a : 탄성리브308: rear induction part 201a: elastic rib
203a : 감쇄흡수리브 308a : 후음 배출관203a: damping absorption rib 308a: trailing exhaust pipe
본 발명은 모니터 티브이(TV)수상기 등의 기기에서, 스피커에서 발생하는 음성신호에 의해서 그 진동이 모니터 또는 티브이 수상기 화면에 전달되어 화면 떨림 현상이 발생하는 것을 방지할 수 있도록 한 영상표시기기의 스피커 출력에 의한 화면떨림 방지장치에 관한것이다.The present invention is a speaker of a video display device in the device such as a monitor TV receiver, the vibration is transmitted to the monitor or TV receiver screen by the audio signal generated from the speaker to prevent the screen shake occurs It is about the screen shake prevention device by output.
종래의 티브이 수상기(또는 모니터 기기)에 있어서, 브라운관과 스피커의 체결구조를 살펴보면 제1도에 도시된 바와같이, 기기 캐비넷(1)에 브라운관(2)을 고정할 때, 브라운관(2)의 러그(3)와 체결 나사(4)를 이용해서 캐비넷 보스(5)에 나사 결합하여 브라운관(2)을 고정하고, 스피커(6) 또는 체결 나사(7)를 이용해서 캐비넷 보스(8)에 나사 결합하여 스피커(6)를 고정하고 있다.In the conventional TV receiver (or monitor device), when looking at the fastening structure of the CRT and the speaker, as shown in FIG. 1, the lug of the CRT 2 is fixed when the CRT 2 is fixed to the appliance cabinet 1. (3) and fasten the Braun tube (2) by screwing it into the cabinet boss (5) using the fastening screw (4), and screwing into the cabinet boss (8) using the speaker (6) or fastening screw (7). The speaker 6 is fixed.
그러므로, 기기의 동작중에 스피커(6)의 음성 신호 출력에 의해 발생되는 진동이 고체 매체를 통해 브라운관(2)에 직접 전달되어 화면 떨림 현상이 발생하게 되는 데, 이러한 진동 전달의 경로를 살펴보면 다음과 같다.Therefore, the vibration generated by the audio signal output of the speaker 6 during the operation of the device is transmitted directly to the CRT 2 through a solid medium to cause the screen shake phenomenon. same.
즉, 스피커(6)로 부터의 진동이 나사(7)와 보스(8)를 통해 캐비넷(1)에 전달되고, 이 진동은 다시 브라운관 에스 커션 부위(1a)를 통해 브라운관(2)에 전달되는 경로와, 보스(5)와 나사(4) 및 러그(3)를 통해 전달되는 경로로 펀넬부(2a)에 전달되고, 또한 이 진동은 프레임(2b)를 통해 섀도우 마스크(2c)에 전달되어 섀도우 마스크(2c)를 진동시켜 화면 떨림 현상(하울링 현상)을 일으키게 되며, 한편으로는 전자총(2d)을 진동시켜 전자빔의 편향에 영향을 미침으로서 역시, 하울링 현상을 발생시키게 되었던 것이다.That is, the vibration from the speaker 6 is transmitted to the cabinet 1 through the screw 7 and the boss 8, and this vibration is again transmitted to the CRT 2 through the CRT escalation part 1a. A path and a path transmitted through the bosses 5 and the screws 4 and the lugs 3 to the funnel portion 2a, which is also transmitted to the shadow mask 2c through the frame 2b. The shadow mask 2c is vibrated to cause a screen shake phenomenon (howling phenomenon). On the other hand, the howling phenomenon is generated by vibrating the electron gun 2d to affect the deflection of the electron beam.
그러므로, 종래에는 스피커(6)에서 발생된 진동이 고체 전달을 통해 직접 브라운관(2)으로 전달되기 때문에 심한 하울링 현상이 발생하는 문제점과, 이로 인하여 사용자가 화면을 보고 작업할때 화면 떨림으로 인하여 눈이 쉽게 피로해짐은 물론, 화상이 깨끗하지 못하여 제품의 신뢰성도 저하시키는 등의 문제점이 있다.Therefore, in the related art, since the vibration generated from the speaker 6 is directly transmitted to the CRT 2 through the solid transmission, a severe howling phenomenon occurs, and thus, the user may notice the eye due to the screen shaking when the user works on the screen. This easily fatigues, of course, there is a problem that the image is not clean and the reliability of the product is also reduced.
본 발명은 스피커의 진동을 완충시키는 수단을 구비하고, 스피커 진동이 브라운관에 직접 전달되지 않도록 흡수하는 수단과 전달경로를 차단하는 수단을 구비하므로서, 상기한 바와같은 종래의 문제점을 해결하고, 화면 떨림 현상의 방지와 선명하고 깨끗한 화면을 제공하여 제품의 품질을 향상시킬 수 있도록 한 것으로, 이하 첨부된 도면 제2도에서 제4도를 참조하여 본 발명의 구성과 작용 및 효과를 설명하면 다음과 같다.The present invention includes a means for buffering the vibration of the speaker, and a means for absorbing the speaker vibration is not directly transmitted to the CRT and means for blocking the transmission path, thereby solving the conventional problems as described above, screen shake To prevent the phenomenon and to provide a clear and clean screen to improve the product quality, the configuration, operation and effects of the present invention will be described below with reference to FIG. .
먼저, 제2도를 참조하여 본 발명 영상표시기기의 스피커 출력에 의한 화면 떨림방지 장치의 구성부터 설명하면, 스피커의 요크부(6)가 결합되며, 스피커의 진동을 감쇄시키기 위하여 내주연으로는 다수개의 탄성리브(201a)를 형성하는 홀더부(201)와, 스피커(6)의 프레임 부분이 나사(8)로 체결되며 상기 홀더부(201)에 연장되는 고정돌기부(202)와, 상기 홀더부(201)에 연장되는 지지리브(205)와, 지지리브(205)에 연장되어 스피커(6)의 진동을 탄성력에 의해 흡수하도록 주름부 형상의 감쇄흡수리브(203a)를 형성하는 탄성흡수부(203)와, 감쇄흡수리브(203a)를 형성한 탄성흡수부(203)의 선단에 형성되며, 울림통(300)의 체결구멍(302)에 체결되는 체결 고리부(204)가 일체화되어 스피커(6)가 내부에 고정결합되는 진동흡수부(200)와, 상기 스피커를 내장하는 진동 흡수부(200)가 내부에 결합되는 울림 공간부(301)와, 울림 공간부(301) 일측벽면에 형성되며, 상기 체결 고리부(204)가 결합되는 체결구멍(302)과, 상기 울림 공간부(301) 벽면에 연장되어 기기 내부의 메인 브라켓에 고정되는 고정 돌기부(303) 및 결합 돌기부(304)와, 상기 울림 공간부(301)의 연장으로 통공된 후음 유도부(308)와, 후음 유도부(308)의 선단에는 나팔관 형상으로 형성된 후음 배출관(308a)을 구성되는 울림통(300)을 구성함을 특징으로 한다.First, referring to FIG. 2, the configuration of the apparatus for preventing the screen shake caused by the speaker output of the video display device of the present invention will be described. The yoke part 6 of the speaker is coupled to the inner circumference to reduce the vibration of the speaker. A holder portion 201 forming a plurality of elastic ribs 201a, a frame portion of the speaker 6 is fastened with a screw 8, and a fixing protrusion 202 extending to the holder portion 201, and the holder An elastic absorbing portion extending from the support portion 201 to the support rib 205 to form a corrugated damping rib 203a so as to absorb the vibration of the speaker 6 by elastic force; 203 and a fastening ring portion 204 formed at the distal end of the elastic absorbing portion 203 having the attenuation absorbing rib 203a fastened to the fastening hole 302 of the ring 300, are integrated into the speaker ( 6) is a vibration absorbing unit 200 is fixedly coupled to the inside, and the vibration absorbing unit 200 is built in the speaker Ringing space portion 301 coupled to the inside, the ringing space portion 301 is formed on one side wall, the fastening hole 302 is coupled to the fastening ring 204, and the ringing space portion 301 on the wall surface A fixed protrusion 303 and a coupling protrusion 304 which are extended to be fixed to the main bracket inside the device, a rear sound guide 308 through which the ring space 301 is extended, and a front end of the rear voice guide 308. Characterized in that comprises a ringing tub 300, which is composed of a posterior discharge pipe 308a formed in a fallopian tube shape.
그리고 상기 울림통(300)의 체결구멍(302) 주변에는 상기 체결 고리(204)에 의해 체결되는 탄성 흡수부(203)를 받쳐서 그 처짐을 방지하는 리브(305)가 구성됨을 특징으로 한다.In addition, a rib 305 is formed around the fastening hole 302 of the ring barrel 300 to support the elastic absorbing portion 203 fastened by the fastening ring 204 to prevent sag.
또한, 상기 울림통(300)에는 상기 진동 흡수부(200)에 의해 결합 고정되는 스피커(6)의 리드선(6b)을 인출하여 회로 기판에 배선될 수 있도록 해주는 리드선 구멍(306)이 구성됨을 특징으로 한다.In addition, the ring barrel 300 is characterized in that the lead wire hole 306 is configured to draw the lead wire 6b of the speaker 6 coupled and fixed by the vibration absorbing unit 200 to be wired to the circuit board do.
미 설명부호 307은 울림통(300)을 메인브라켓에 고정하기 위하여 고정돌기부(303)에 형성된 고정공이다.Unexplained reference numeral 307 is a fixing hole formed in the fixing protrusion 303 in order to fix the ring 300 to the main bracket.
이와같이 구성되는 본 발명의 화면 떨림방지 장치를 적용한 티브이 수상기에서 스피커와 브라운관, 메인 브라켓 등의 구성을 도면 제3도에 도시하였으며, 결합된 상태의 상세한 단면구성을 제4도에 도시하였다.The configuration of the speaker, the cathode ray tube, the main bracket, and the like in the TV receiver to which the screen shake prevention apparatus of the present invention configured as described above is illustrated in FIG. 3, and the detailed cross-sectional configuration of the coupled state is illustrated in FIG.
제3도 및 제4도를 참조하면, 스피커(6)는 캐비넷(1)에 직접 결합되지 않고, 진동 흡수부(200)와 울림통(300)을 이용해서, 메인 회로 기판(9)이 체결된 메인 브라켓(10)에 나사(11)로 체결되어 진다.3 and 4, the speaker 6 is not directly coupled to the cabinet 1, and the main circuit board 9 is fastened by using the vibration absorbing unit 200 and the ring barrel 300. The main bracket 10 is fastened with a screw 11.
그러므로, 스피커(6)에서 출력되는 음성신호는 울림통(300)의 울림 공간부(301)에서 공명되어 울림 공간부(301)와 통공된 후음 유도부(308)를 거쳐 후음 배출관(308a)을 통해 캐비넷(1) 밖으로 출력되며, 이에 따라서, 후음으로 인한 제품 내부로 전달되어 브라운관(2)에 전달되는 음의 전파를 방지하게 된다.Therefore, the audio signal output from the speaker 6 is resonated in the ringing space portion 301 of the ringing chamber 300 and passes through the rear sound induction pipe 308 through the rear sound induction pipe 308 through the sounding space portion 301 through the cabinet through the cabinet. (1) is output outside, thereby preventing the propagation of sound transmitted to the inside of the product due to the rear sound is transmitted to the CRT (2).
스피커(6)의 진동은 고정돌기부(202) 및 나사(8)를 통해 홀더부(201)를 거쳐 탄성 흡수부(203)에 전달되는 바, 홀더부(201)에 형성된 탄성리브(201a)에 의해 스피커(6)로부터 발생된 진동은 1차적으로 흡수되어 약화되어 진다.The vibration of the speaker 6 is transmitted to the elastic absorbing part 203 through the holder 201 through the fixing protrusion 202 and the screw 8 to the elastic rib 201a formed in the holder 201. The vibration generated by the speaker 6 is primarily absorbed and weakened.
상기에서와 같이 약화되어진 스피커(6)로부터 발생된 진동은 홀더부(201)에 연장되어 형성된 지지리브(205)를 통하여 탄성흡수부(203)의 감쇄흡수리브(203a)에 전달되어 지며, 이와같이 전달된 진동은 감쇄흡수리브(203a)의 굴곡을 따라 지그자그(Zigzag)로 전달되면서 완충과 흡수를 반복하면서 진동력은 더욱 약화되어 지게 된다.The vibration generated from the weakened speaker 6 as described above is transmitted to the attenuation absorption rib 203a of the elastic absorption portion 203 through the support rib 205 formed to extend in the holder portion 201. The transmitted vibration is transmitted to Zigzag along the curvature of the attenuation absorption rib 203a, and the vibration force is further weakened while repeating the buffering and absorption.
또한, 울림통(300)은 그 체결구멍(203)에 탄성흡수부(203)의 선단에 형성된 체결 고리부(204)와 체결되므로, 이곳을 통해 전달되는 진동은 강력한 나사 결합의 경우보다 약간의 치수상의 여유가 있기 때문에 그 진동이 다시 흡수되고, 이와같이 약화된 진동은 고정 돌기부(304) 및 결합 돌기부(305)에 연결되는 메인 브라켓(10)으로 전달되어 또다시 진동을 흡수하게 된다.In addition, since the ring 300 is fastened with the fastening ring 204 formed at the distal end of the elastic absorbing portion 203 in the fastening hole 203, the vibration transmitted through this is slightly smaller than in the case of strong screwing Since the vibration is absorbed again because there is room, the weakened vibration is transmitted to the main bracket 10 connected to the fixing protrusion 304 and the coupling protrusion 305 to absorb the vibration again.
그러므로 메인 브라켓(10)을 통해 캐비넷(1)으로 전달되는 진동은 거의 소멸되어 브라운관(2)에 영향을 거의 미치지 않게 된다.Therefore, the vibration transmitted to the cabinet 1 through the main bracket 10 is almost extinguished to have little effect on the CRT 2.
그리고 상기한 바와같이 스피커(6)가 진동 흡수부(200)와 울림통(300)을 이용해서 체결되기 때문에 스피커(6)의 요크부(6a)를 홀더부(201)에 결합하고 또한, 울림통(300)의 리브(305)가 체결고리부(204) 및 탄성 흡수부(203)를 받쳐서 그 처짐을 방지해 주므로서, 견고하게 고정된 상태가 유지될 수 있게 하고, 스피커(6)의 리드선(6b)는 리드선 구멍(306)을 통과시켜 메인 회로 기판(9)에 배선 처리할 수 있도록 한 것이다.Since the speaker 6 is fastened using the vibration absorbing unit 200 and the ringing cylinder 300 as described above, the yoke portion 6a of the speaker 6 is coupled to the holder portion 201, and the ringing cylinder ( The rib 305 of the 300 supports the fastening ring portion 204 and the elastic absorbing portion 203 to prevent sag, so that a rigidly fixed state can be maintained, and the lead wire of the speaker 6 6b) passes through the lead wire hole 306 so that the main circuit board 9 can be wired.
이상에서 설명한 바와같이 본 발명 영상표시기기의 스피커 출력에 의한 화면 떨림방지장치에 있어서, 스피커(6)의 진동이 직접 캐비넷(1)을 통해 브라운관(2)에 전달되지 않고, 진동 흡수부(200)와 울림통(300), 메인 브라켓(10)으로 이루어지는 진동 전달 경로상에서 완충, 흡수, 소멸이 이루어지기 때문에 화면 떨림 현상을 방지할 수 있게 되며, 선명하고 깨끗한 화면을 제공하여 제품의 품질을 높일 수 있음은 물론, 작업자의 눈을 피로하게 하지 않게 할 수 있는 등의 효과가 있다As described above, in the apparatus for preventing the screen shake due to the output of the speaker of the video display device of the present invention, the vibration of the speaker 6 is not directly transmitted to the CRT 2 through the cabinet 1, and the vibration absorbing part 200 ), Buffering, absorbing, and extinguishing is performed on the vibration transmission path consisting of the bellows 300 and the main bracket 10, thereby preventing the screen shaking, and providing a clear and clean screen to improve the product quality. Of course, there are effects such as not to make the eyes of the worker tired.
Claims (3)
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950026888A KR0162971B1 (en) | 1995-08-28 | 1995-08-28 | An apparatus for preventing vibration from picture by speaker output in image displayer |
| US08/645,642 US5682021A (en) | 1995-06-14 | 1996-05-16 | Howling phenomena removing apparatus for video display appliances |
| AU52421/96A AU691750B2 (en) | 1995-06-14 | 1996-05-21 | Howling phenomena removing apparatus for video display apparatus |
| CA002177234A CA2177234C (en) | 1995-06-14 | 1996-05-23 | Howling phenomena removing apparatus for video display appliances |
| GB9611745A GB2302233B (en) | 1995-06-14 | 1996-06-05 | Howling phenomena removing apparatus for video display appliances |
| DE19622723A DE19622723C2 (en) | 1995-06-14 | 1996-06-06 | Device for display devices for suppressing feedback |
| IT96MI001176A IT1283117B1 (en) | 1995-06-14 | 1996-06-10 | HOWLING OR BUZZING PHENOMENA REMOVAL EQUIPMENT FOR VIDEO VIEWING EQUIPMENT |
| BR9601820A BR9601820A (en) | 1995-06-14 | 1996-06-12 | Apparatus to eliminate the phenomenon of howling in video equipment |
| JP8150934A JP2883972B2 (en) | 1995-06-14 | 1996-06-12 | Screen shake prevention device by speaker output of video display device |
| RU96111821A RU2148892C1 (en) | 1995-06-14 | 1996-06-13 | Device for preventing influence of loudspeaker acoustic signal onto video terminal of electronic device |
| CN96106601A CN1110191C (en) | 1995-06-14 | 1996-06-13 | Device for preventing image-jitter resulted from output of acoustic amplifier of image displayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950026888A KR0162971B1 (en) | 1995-08-28 | 1995-08-28 | An apparatus for preventing vibration from picture by speaker output in image displayer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970014265A KR970014265A (en) | 1997-03-29 |
| KR0162971B1 true KR0162971B1 (en) | 1999-01-15 |
Family
ID=19424702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950026888A Expired - Fee Related KR0162971B1 (en) | 1995-06-14 | 1995-08-28 | An apparatus for preventing vibration from picture by speaker output in image displayer |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0162971B1 (en) |
-
1995
- 1995-08-28 KR KR1019950026888A patent/KR0162971B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR970014265A (en) | 1997-03-29 |
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