KR100496684B1 - Car TV with diversity antenna circuit - Google Patents
Car TV with diversity antenna circuit Download PDFInfo
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- KR100496684B1 KR100496684B1 KR10-2002-0055049A KR20020055049A KR100496684B1 KR 100496684 B1 KR100496684 B1 KR 100496684B1 KR 20020055049 A KR20020055049 A KR 20020055049A KR 100496684 B1 KR100496684 B1 KR 100496684B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
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Abstract
본 발명은 다이버시티 안테나회로를 구비한 차량용 텔레비젼에 관한 것으로 차량용 텔레비젼의 컨트롤 보드(board)내의 마이콤 등을 활용하여 다이버시티 안테나회로를 구성함으로서 원가상승의 요인을 제거하거나 차량내의 설치공간을 감소시키며 차량조립시 별도의 조립공정을 제거하여 생산성을 향상시키는 수단을 제공하는 것을 목적으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle television having a diversity antenna circuit. The diversity antenna circuit is utilized by using a microcomputer in a control board of a vehicle television to eliminate a factor of cost increase or to reduce an installation space in a vehicle. It is an object of the present invention to provide a means for improving productivity by removing a separate assembly process when assembling a vehicle.
이를 위하여 본 발명은 다이버시티 안테나회로를 구비한 차량용 텔레비젼은 튜너와, 쏘필터와, 증폭부와, 검출부와, 비디오/오디오복조부와, 안테나와, 안테나스위칭부와, 레벨검출부와, 동기신호분리부와, 노이즈증폭부와, 노이즈비교부와, 마이콤으로 구성이 되는 차량용 텔레비젼에 있어서,To this end, according to the present invention, a vehicle television having a diversity antenna circuit includes a tuner, a saw filter, an amplifier, a detector, a video / audio demodulator, an antenna, an antenna switch, a level detector, a synchronization signal. In a vehicular television comprising a separating section, a noise amplifying section, a noise comparing section, and a microcomputer,
상기 동기신호분리부로부터 수평동기신호가 입력되고 노이즈비교부로부터 수신신호의 노이즈레벨이 기준레벨보다 작다는 신호가 인가된 안테나의 레벨검출부 출력값을 저장한 후, 레벨검출부의 출력값이 가장 높은 안테나로 고정되도록 제어하는 마이콤은, 차량용 텔레비젼의 컨트롤 보드(board)내에서 텔레비젼의 기능을 제어하는 마이콤을 공용(共用)하여 상기 컨트롤보드내에 다이버시티 안테나회로를 제어하는 별도의 마이콤을 존재시키지 않도록 구성이 되는 것에 특징이 있다.After the horizontal synchronization signal is input from the synchronization signal separating unit and the signal is output from the noise comparator, the signal of which the noise level of the received signal is less than the reference level is stored, and the output value of the level detecting unit is the highest. The microcomputer for controlling to be fixed is configured such that a microcomputer for controlling the function of the television in the control board of the vehicle television is shared so that there is no separate microcomputer for controlling the diversity antenna circuit in the control board. It is characterized by being.
Description
본 발명은 다른 방향으로 설치되는 둘 이상의 안테나를 구비하고 그 안테나중 신호수신특성이 가장 좋은 안테나를 통해 신호를 수신받는 다이버시티 안테나를 구비한 차량용 텔레비젼에 관한 것으로서, 보다 상세하게는 다이버시티 안테나회로를 구비한 차량용 텔레비젼에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle television having a diversity antenna having two or more antennas installed in different directions and receiving a signal through an antenna having the best signal reception characteristic among the antennas. It relates to a vehicle television having a.
도 1은 종래의 실시예에 따른 차량용 텔레비젼을 도시한 블록구성도로서, 차량의 외부에 부착설치되는 안테나(ANT)와, 상기 안테나(ANT)를 통해 선택채널의 반송주파수를 수신하여 중간주파수로 변환하는 튜너(11)와, 상기 튜너(11)의 출력단에 구비되며 중간주파수 대역통과특성을 갖는 쏘필터(12)와, 상기 쏘필터(12)를 통해 인접채널 및 노이즈가 제거된 중간주파수를 소정 레벨로 증폭하는 증폭부(13)와, 상기 증폭부(13)로부터 출력되는 중간주파수에서 영상중간주파수와 음성중간주파수를 찾기 위한 기준주파수를 검출하는 검출부(14)와, 상기 검출부(14)로부터 출력되는 중간주파수중 검출된 기준주파수에 따라 영상중간주파수를 복조하여 베이스밴드의 영상신호로 변환하는 비디오복조부(16)와, 상기 검출부(14)로부터 출력되는 중간주파수중 검출된 기준주파수에 따라 음성중간주파수를 복조하여 베이스밴드의 음성신호로 변환하는 오디오복조부(17)를 포함한다.FIG. 1 is a block diagram illustrating a vehicle television according to a conventional embodiment, in which an antenna ANT attached to an exterior of a vehicle and a carrier frequency of a selected channel are received through the antenna ANT to receive an intermediate frequency. A tuner 11 to be converted, an output filter of the tuner 11, a saw filter 12 having an intermediate frequency band pass characteristic, and an intermediate frequency from which adjacent channels and noise are removed through the saw filter 12 An amplifier 13 for amplifying to a predetermined level, a detector 14 for detecting a reference frequency for searching for an image intermediate frequency and an audio intermediate frequency at an intermediate frequency output from the amplifier 13, and the detector 14 A video demodulator 16 which demodulates the video intermediate frequency according to the detected reference frequency among the intermediate frequencies output from the video signal and converts the video intermediate frequency into a video signal of the baseband, and the reference detected among the intermediate frequencies output from the detector 14. Depending on the frequency demodulated audio intermediate frequency to an audio demodulator (17) for conversion into a voice signal of a base band.
이렇게, 차량에 부착되는 텔레비젼도 어느 한 장소에 고정설치되는 일반적인 텔레비젼과 마찬가지로 구성되어있으며, 단지 가정용 텔레비젼과는 달리 수신감도가 더 좋은 안테나를 사용한다는 점에 차이가 있다. In this way, the television attached to the vehicle is configured like a general television fixedly installed in any one place, and there is a difference in that an antenna having better reception sensitivity is used, unlike a home television.
그런데, 차량용 텔레비젼은 가정용 텔레비젼과는 달리 자동차에 설치되어 수신지역이 계속 변하게 되기 때문에, 아무리 좋은 안테나를 설치한다고 하더라도 이동지역에 따라 수신특성이 달라진다는 문제점이 있으며, 심한 경우에는 수신특성이 아주 나빠 시청이 불가능해지기도 한다. 따라서 수신방향이 서로 다른 둘 이상의 안테나를 구비하여 그중 수신특성이 가장 좋은 안테나를 선택연결하고 시청중에도 노이즈가 커지면 수신특성이 더 좋은 안테나로 변경하여 항상 좋은 화질을 유지할 수 있는 다이버시티 안테나설치하고 있다.However, since a television for a vehicle is installed in a car and unlike a home television, the reception area is continuously changed, even if a good antenna is installed, the reception characteristics are different depending on the moving area. In severe cases, the reception characteristics are very bad. You may not be able to watch. Therefore, it is equipped with two or more antennas with different reception directions, and selects the antenna having the best reception characteristics, and if the noise increases during watching, a diversity antenna is installed which can always maintain good image quality by changing to an antenna having better reception characteristics. .
그러나, 상기 장치는 다이버시티 전용 IC를 사용하거나 외부에 다이버시티 모듈을 이용하여 구성을 하고 있어서 원가상승의 요인이 되거나 차량내의 설치공간이 필요하며 차량조립시 별도의 조립공정이 필요하다는 문제점이 있다.However, since the device is configured using a diversity dedicated IC or a diversity module externally, there is a problem of cost increase or installation space in the vehicle, and a separate assembly process is required when assembling the vehicle. .
본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 차량용 텔레비젼의 컨트롤 보드(board)내의 마이콤 등을 활용하여 다이버시티 안테나회로를 구성함으로서 원가상승의 요인을 제거하거나 차량내의 설치공간을 감소시키며 차량조립시 별도의 조립공정을 제거하여 생산성을 향상시키는 수단을 제공함에 그 목적이 있다. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and by using a diversity antenna circuit in a control board of a vehicle television, a diversity antenna circuit is used to eliminate a factor of cost increase or to reduce an installation space in a vehicle. Its purpose is to provide a means of improving productivity by removing a separate assembly process when assembling a vehicle.
상기한 바와 같은 목적을 달성하기 위한 본 발명에 따른 다이버시티 안테나회로를 구비한 차량용 텔레비젼은 튜너와, 쏘필터와, 증폭부와, 검출부와, 비디오/오디오복조부와, 안테나와, 안테나스위칭부와, 레벨검출부와, 동기신호분리부와, 노이즈증폭부와, 노이즈비교부와, 마이콤으로 구성이 되는 차량용 텔레비젼에 있어서,A vehicle television having a diversity antenna circuit according to the present invention for achieving the above object includes a tuner, a saw filter, an amplifier, a detector, a video / audio demodulator, an antenna, and an antenna switching unit. In a vehicle television comprising a level detector, a synchronization signal separator, a noise amplifier, a noise comparator, and a microcomputer,
상기 동기신호분리부로부터 수평동기신호가 입력되고 노이즈비교부로부터 수신신호의 노이즈레벨이 기준레벨보다 작다는 신호가 인가된 안테나의 레벨검출부 출력값을 저장한 후, 레벨검출부의 출력값이 가장 높은 안테나로 고정되도록 제어하는 마이콤은, 차량용 텔레비젼의 컨트롤 보드(board)내에서 텔레비젼의 기능을 제어하는 마이콤을 공용(共用)하여 상기 컨트롤보드내에 다이버시티 안테나회로를 제어하는 별도의 마이콤을 존재시키지 않도록 구성이 되는 것을 특징으로 하는 것을 특징으로 한다.After the horizontal synchronization signal is input from the synchronization signal separating unit and the signal is output from the noise comparator, the signal of which the noise level of the received signal is less than the reference level is stored, and the output value of the level detecting unit is the highest. The microcomputer for controlling to be fixed is configured such that a microcomputer for controlling the function of the television in the control board of the vehicle television is shared so that there is no separate microcomputer for controlling the diversity antenna circuit in the control board. Characterized in that it is characterized in that.
이하, 본 발명의 바람직한 실시예에 대하여, 첨부 도면을 참조하여 설명한다. EMBODIMENT OF THE INVENTION Hereinafter, the preferred embodiment of this invention is described with reference to an accompanying drawing.
도 2는 본 발명의 실시예에 따른 차량용 텔레비젼을 도시한 블록구성도로서, 크게 다이버시티 모듈(41)과 튜너 팩(42)과 A/V 유니트(43)와 마이콤(32)으로 구성이 되며,FIG. 2 is a block diagram showing a vehicle television according to an exemplary embodiment of the present invention, and includes a diversity module 41, a tuner pack 42, an A / V unit 43, and a microcomputer 32. ,
다이버시티 모듈(41)은 서로 다른 수신방향을 갖도록 설치되는 둘 이상의 안테나를 설치한다. 예컨대, 제1안테나∼제4안테나(ANT1∼ANT4)와, 상기 제1안테나∼제4안테나(ANT1~ANT4)중 하나를 선택하여 튜너(22)에 연결하는 안테나스위칭부(21)와 마이콤(32)의 제어에 따라서 선택된 안테나가 튜너(22)에 연결되도록 상기 안테나스위칭부(21)를 구동시키는 스위칭구동부(33)로 구성이 되고, The diversity module 41 installs two or more antennas installed to have different reception directions. For example, the antenna switching unit 21 and the microcomputer (1) to 4th antennas (ANT1 to ANT4) and the first to fourth antennas (ANT1 to ANT4) are selected and connected to the tuner 22. 32 is configured as a switching driver 33 for driving the antenna switching unit 21 so that the selected antenna is connected to the tuner 22,
튜너 팩(42)은 상기 안테나스위칭부(21)를 통해 연결된 안테나(ANT1∼ANT4 중 하나)를 통하여 시청자가 선택한 채널의 반송주파수를 수신하여 중간주파수로 변환하는 튜너(22)와, 상기 튜너(22)의 출력단에 구비되며 중간주파수 대역통과특성을 갖는 쏘필터(23)와, 상기 쏘필터(23)를 통해 인접채널 및 노이즈가 제거된 중간주파수를 소정 레벨로 증폭하는 증폭부(24)와, 상기 증폭부(24)로부터 출력되는 중간주파수에서 영상중간주파수와 음성중간주파수를 찾기 위한 기준주파수를 검출하는 검출부(25)로 구성이 되며,The tuner pack 42 includes a tuner 22 which receives a carrier frequency of a channel selected by a viewer through an antenna (one of ANT1 to ANT4) connected through the antenna switching unit 21 and converts the carrier frequency into an intermediate frequency, and the tuner ( A saw filter 23 having an intermediate frequency band pass characteristic at an output end of the filter 22, an amplification part 24 for amplifying the adjacent frequency and the intermediate frequency from which noise is removed through the saw filter 23 to a predetermined level; The detection unit 25 detects a reference frequency for finding an image intermediate frequency and an audio intermediate frequency from the intermediate frequency output from the amplifying unit 24.
A/V 유니트(43)는 상기 검출부(25)로부터 출력되는 중간주파수중 검출된 기준주파수에 따라 영상중간주파수를 복조하여 베이스밴드의 영상신호로 변환하는 비디오복조부(26)와, 상기 검출부(25)로부터 출력되는 중간주파수중 검출된 기준주파수에 따라 음성중간주파수를 복조하여 베이스밴드의 음성신호로 변환하는 오디오복조부(27)와, 상기 검출부(25)를 통해 중간주파수의 레벨을 검출하여 직류전압으로 변환출력하는 레벨검출부(28)와, 상기 비디오복조부(26)로부터 출력되는 영상신호에서 수평동기신호를 분리하여 출력하는 동기신호분리부(29)와, 영상신호에 포함된 노이즈를 분리증폭하는 노이즈증폭부(30)와, 상기 노이즈증폭부(30)로부터 출력되는 노이즈신호를 콘덴서(C)에 의해 설정되는 노이즈레벨기준값보다 큰지를 비교하여 그 결과를 출력하는 노이즈비교부(31)로 구성이 되고,The A / V unit 43 is a video demodulator 26 for demodulating the video intermediate frequency according to the detected reference frequency among the intermediate frequencies output from the detector 25 and converting it into a video signal of the baseband, and the detection unit ( The audio demodulator 27 demodulates the voice intermediate frequency according to the detected reference frequency among the intermediate frequencies output from the digital signal 25 and converts the audio frequency into a baseband voice signal, and detects the level of the intermediate frequency through the detection unit 25. A level detector 28 for converting and outputting a DC voltage, a sync signal separator 29 for separating and outputting a horizontal sync signal from an image signal output from the video demodulator 26, and noise included in the video signal. The noise amplification unit 30 that separates and amplifies the noise signal output from the noise amplification unit 30 is compared with a noise level reference value set by the capacitor C, and outputs the result. Noise comparator 31,
마이콤(32)은 초기동작시 상기 제1∼제4안테나(ANT1∼ANT4)가 순차적으로 튜너(22)에 연결되도록 제어신호를 출력하면서 각 안테나를 통하여 수신된 신호에 대해 동기신호분리부(29)로부터 수평동기신호가 인가되고 노이즈비교부(31)로부터 수신신호에 포함된 레벨이 기준레벨보다 작다는 신호가 인가되면 레벨검출부(28)에 의해 검출된 신호레벨을 나타내는 직류값을 기억하는 안테나검색동작을 실행하여 최대 직류값을 갖는 안테나(ANT1∼ANT4)가 튜너(22)에 고정연결되도록 제어하며, 안테나가 고정된 후에도 수신신호의 노이즈레벨이 기준레벨보다 크다는 신호가 노이즈비교부(31)로부터 인가되면 상술한 안테나검색동작을 실행시켜 큰 레벨의 신호가 수신되는 안테나로 변경 고정되도록 제어한다.The microcomputer 32 outputs a control signal so that the first to fourth antennas ANT1 to ANT4 are sequentially connected to the tuner 22 during the initial operation, and synchronizes the synchronization signal separator 29 with respect to the signals received through each antenna. When the horizontal synchronous signal is applied and the signal from the noise comparator 31 that the level included in the received signal is smaller than the reference level is applied, the antenna stores a DC value indicating the signal level detected by the level detector 28. The search operation is performed to control the antennas ANT1 to ANT4 having the maximum direct current values to be fixedly connected to the tuner 22. The signal that the noise level of the received signal is greater than the reference level after the antenna is fixed is the noise comparator 31 When applied from the control unit, the antenna search operation described above is executed to control the antenna to be fixed to the antenna for receiving a large level signal.
상기한 바와 같이, 본 발명에 관한 다이버시티 안테나회로를 구비한 차량용 텔레비젼에 의하면, 차량용 텔레비젼의 컨트롤 보드(board)내의 마이콤 등을 활용하여 다이버시티 안테나회로를 구성함으로서 원가상승의 요인을 제거하거나 차량내의 설치공간을 감소시키며 차량조립시 별도의 조립공정을 제거하여 생산성을 향상시킬 수 있다.As described above, according to the vehicle television provided with the diversity antenna circuit according to the present invention, the diversity antenna circuit is eliminated by forming a diversity antenna circuit using a microcomputer or the like in the control board of the vehicle television. It can reduce the installation space in the inside and improve productivity by eliminating the separate assembly process when assembling the vehicle.
도 1은 종래의 실시예에 따른 차량용 텔레비젼을 도시한 블록구성도.1 is a block diagram showing a vehicle television according to a conventional embodiment.
도 2는 본 발명의 실시예에 따른 차량용 텔레비젼을 도시한 블록구성도.Figure 2 is a block diagram showing a vehicle television according to an embodiment of the present invention.
♣ 도면의 주요부분에 대한 부호의 설명 ♣ ♣ Explanation of symbols for main part of drawing ♣
ANT1∼ANT4 : 제1안테나∼제4안테나ANT1-ANT4: 1st antenna-4th antenna
21 : 안테나스위칭부 22 : 튜너21: antenna switching unit 22: tuner
23 : 쏘필터 24 : 증폭부23: saw filter 24: amplification unit
25 : 검출부 26 : 비디오복조부25 detection unit 26 video demodulation unit
27 : 오디오복조부 28 : 레벨검출부27: audio demodulator 28: level detector
29 : 동기신호분리부 30 : 노이즈증폭부29: synchronization signal separator 30: noise amplifier
31 : 노이즈비교부 32 : 마이콤31: noise comparison unit 32: micom
33 : 스위칭구동부 41 : 다이버시티 모듈33: switching driver 41: diversity module
42 : 튜너 팩 43 : A/V 유니트42: Tuner Pack 43: A / V Unit
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0055049A KR100496684B1 (en) | 2002-09-11 | 2002-09-11 | Car TV with diversity antenna circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0055049A KR100496684B1 (en) | 2002-09-11 | 2002-09-11 | Car TV with diversity antenna circuit |
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| Publication Number | Publication Date |
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| KR20040023336A KR20040023336A (en) | 2004-03-18 |
| KR100496684B1 true KR100496684B1 (en) | 2005-06-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000031774A (en) * | 1998-11-10 | 2000-06-05 | 전주범 | Television for vehicle containing diversity antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20000031774A (en) * | 1998-11-10 | 2000-06-05 | 전주범 | Television for vehicle containing diversity antenna |
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