JPS62168477A - Electric field strength display device - Google Patents
Electric field strength display deviceInfo
- Publication number
- JPS62168477A JPS62168477A JP61009283A JP928386A JPS62168477A JP S62168477 A JPS62168477 A JP S62168477A JP 61009283 A JP61009283 A JP 61009283A JP 928386 A JP928386 A JP 928386A JP S62168477 A JPS62168477 A JP S62168477A
- Authority
- JP
- Japan
- Prior art keywords
- field strength
- electric field
- channel
- circuit
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005684 electric field Effects 0.000 title claims abstract description 88
- 238000001514 detection method Methods 0.000 claims description 18
- 230000003321 amplification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、テレビ放送電波を受信して画像と音声を表示
するテレビ受像機において、テレビ放送電波を順次選局
し、現在受信可能なチャンネルの電界強度レベルをディ
スプレイ上にわかり易く表示する電界強度表示装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a television receiver that receives television broadcast waves and displays images and sounds. The present invention relates to a field strength display device that displays strength levels on a display in an easy-to-understand manner.
従来の技術
一般に、テレビ受像機でテレビ放送を受信する時には、
チャンネルを順次サーチし、一定の電界強度以上のチャ
ンネルで自動的に停止して、そのチャンネルを表示する
とともに、受像する自動選局装置を有するテレビ受像機
が用いられている。Conventional technology Generally, when receiving television broadcasts with a television receiver,
2. Description of the Related Art Television receivers are used that have an automatic channel selection device that sequentially searches channels, automatically stops at a channel with an electric field strength above a certain level, displays that channel, and receives the image.
発明が解決しようとする問題点
ところが従来のテレビ受像機を自動車等に搭載した場合
、たえず受信場所が変化する為にどのチャンネルが受信
可能か、又、そのチャンネルが、どの程度の受信状態な
のかがわからず、その都度、使用者が全チャンネルの中
から捜して受信しなければならないという不便がある。Problems that the invention aims to solve However, when a conventional television receiver is installed in a car, etc., the reception location changes constantly, so it is difficult to know which channels can be received and how well the channels are received. There is an inconvenience in that the user has to search among all channels to receive the signal each time.
本発明は、かかる従来の欠点を解消して、受信場所が変
っても受信可能なチャンネル番号やその電界強度レベル
を容易にわかるようにディスプレイ上に表示することの
できるテレビ電界強度表示装置を提供するものである。The present invention eliminates such conventional drawbacks and provides a television field strength display device that can display receivable channel numbers and their field strength levels on a display so that they can be easily seen even if the reception location changes. It is something to do.
問題点を解決するだめの手段
本発明のテレビ電界強度表示装置では、テレビ放送電波
を受信し、映出するテレビ受像機にて、選局したチャン
ネルでのテレビ放送電波の電界強度レベルに応じて変化
する信号、たとえばＲＦＡＧＣ電圧やＩＦＡＧＣ電圧等
の１つ又は複数の信号をＡ／Ｄ コンバータや電圧比
較器に入力し、その出力を検出し、この信号のレベルに
応じてそのチャンネルの電界強度を判定し、ディスプレ
イ上に電界強度レベルの強弱がわかるように表示するも
のである。Means for Solving the Problems In the television field strength display device of the present invention, the television receiver that receives and displays television broadcast waves displays a signal according to the field strength level of the television broadcast waves on the selected channel. One or more changing signals, such as RFAGC voltage or IFAGC voltage, are input into an A/D converter or voltage comparator, the output of which is detected, and the field strength of that channel is determined depending on the level of this signal. The electric field strength level is determined and displayed on the display so that the strength and weakness of the electric field strength level can be seen.
作 用
本発明のテレビ電界強度表示装置によれば、電界強度レ
ベルに応じて変化する信号を入力して電界強度検出回路
で電界強度レベルを判定するとともに、選局したチャン
ネル番号と、そのチャンネルの電界強度レベルを画像表
示回路で画像信号に変換し、ディスプレイ上に表示する
ようにしたものであり、使用者は受信状態がどの程度の
ものであるか容易に判断できるものである。According to the television field strength display device of the present invention, a signal that changes according to the field strength level is input, and the field strength detection circuit determines the field strength level, and also displays the selected channel number and the channel number. The electric field strength level is converted into an image signal by an image display circuit and displayed on a display, so that the user can easily determine the level of reception status.
実施例
以下、本発明の一実施例のテレビ電界強度表示装置を図
面を参照して説明する。EXAMPLE Hereinafter, a television field strength display device according to an example of the present invention will be described with reference to the drawings.
第１図は本発明によるテレビ電界強度表示装置の構成図
を示す。テレビ放送電波はアンテナ１により電気信号に
変換され、テレビチューナ２に印加される。FIG. 1 shows a block diagram of a television field strength display device according to the present invention. Television broadcast radio waves are converted into electrical signals by an antenna 1 and applied to a television tuner 2.
テレビチューナ２の出力であるＩＦ倍信号映像信号処理
回路３で画像信号に変換される。映像信号処理回路３は
、映像ＩＦ増幅回路４と、映像検波回路６と映像増幅回
路６等で構成されている。The IF multiplied signal, which is the output of the television tuner 2, is converted into an image signal by the video signal processing circuit 3. The video signal processing circuit 3 includes a video IF amplification circuit 4, a video detection circuit 6, a video amplification circuit 6, and the like.
７は選局回路で選局電圧やバンド切換電圧をテレビチュ
ーナ２に印加するとともに、順次選局電圧を変化させ、
ＡＦＣ電圧や水平パルス信号等をモニタしながら、一定
レベルの放送電波のあるチャンネルのみを停止させる自
動選局回路を内蔵している。7 is a tuning circuit that applies a tuning voltage and band switching voltage to the TV tuner 2, and sequentially changes the tuning voltage;
It has a built-in automatic tuning circuit that monitors AFC voltage, horizontal pulse signals, etc., and stops only those channels with broadcast radio waves of a certain level.
８は比較回路で映像信号処理回路３から電界強度に応じ
て変化するＲＦＡＧＣやＩＦＡＧＣ等の電圧の大きさに
応じて信号レベルを判定するものでるる。比較回路８は
、アナログ電圧をデジタル信号に変換するＡ／Ｄ コ
ンバータや電圧の大小を比較する電圧比較器等で構成さ
れている。）９は電界強度検出回路で、選局回路７に選
局サーチ開始信号を送り自動選局をスタートさせ、選局
回路７より選局したチャンネル番号を入手するとともに
、電界強度レベルを比較回路８より入手しチャンネル番
号と電界強度のレベルを判定するマイクロコンピュータ
等で構成される演算処理回路である。Reference numeral 8 denotes a comparison circuit which determines the signal level according to the magnitude of the voltage of RFAGC, IFAGC, etc., which changes according to the electric field strength from the video signal processing circuit 3. The comparison circuit 8 includes an A/D converter that converts an analog voltage into a digital signal, a voltage comparator that compares the magnitude of voltage, and the like. ) 9 is a field strength detection circuit which sends a tuning search start signal to the tuning circuit 7 to start automatic tuning, obtains the selected channel number from the tuning circuit 7, and compares the field strength level with the circuit 8. This is an arithmetic processing circuit made up of a microcomputer, etc., that determines the channel number and electric field strength level obtained from the source.
１０は画像表示回路で、第２図に一例を示すと、マイク
ロコンピュータ等のＣＰＵ１０Ａと、ＣＰＵ１０Ａを動
作させるプログラムが記憶されたＲＯＭ１０Ｂと、演算
に必要なデータを一時的に記憶するＲＡＭ１ｏＣと、画
像データを記憶する画像メモリであるＶＲＡＭ１ｏＤと
、演算タイミングと表示タイミングを切換えるマルチプ
レクサ−（７）ＭＰＸｌｏＥと、ＶＲＡＭ１０ｎｏデー
タを制御し、書込可能にしたり、読出したりするＣＲＴ
ＣｌｏＦと、この出力を映像信号に変換する表示回路１
０Ｇ及び、電界強度検出回路９や画像信号切換回路１１
との間でデータの交換、制御をおこなうＩ１０回路１０
Ｈから構成されている。上記画像信号切換回路１１は、
テレビ放送を受信した映像増幅回路６の映像信号と、画
像表示回路１０の映像信号を切換えたり、スーパーイン
ボーズで同時に表示する為に２つの映像信号を切換える
。10 is an image display circuit, an example of which is shown in FIG. 2, includes a CPU 10A such as a microcomputer, a ROM 10B that stores a program for operating the CPU 10A, a RAM 1oC that temporarily stores data necessary for calculations, and an image display circuit. VRAM1oD, which is an image memory that stores data, multiplexer (7) MPXloE, which switches calculation timing and display timing, and CRT, which controls VRAM10no data and makes it writable and readable.
CloF and display circuit 1 that converts this output into a video signal
0G, electric field strength detection circuit 9 and image signal switching circuit 11
I10 circuit 10 that exchanges data and controls between
It is composed of H. The image signal switching circuit 11 includes:
The video signal of a video amplification circuit 6 receiving television broadcasting and the video signal of an image display circuit 10 are switched, or two video signals are switched for simultaneous display in superimpose.
１２はディスプレイで、映像信号をＣＲＴや液晶ディス
プレイ上に画像として表示する０１３は操作スイッチで
、通常の選局操作や電界強度表示をする為の入力スイッ
チ群である。Reference numeral 12 denotes a display, and reference numeral 013 denotes an operation switch, which displays the video signal as an image on a CRT or liquid crystal display, and is a group of input switches for performing normal channel selection operations and displaying electric field strength.
次に本発明のテレビ電界強度表示装置の実施例について
、動作を説明する。Next, the operation of an embodiment of the television field strength display device of the present invention will be described.
操作スイッチ１３により、テレビ電界強度表示指示を入
力すると、選局回路７は、電界強度検出回路９に電界強
度表示モードを知らしめるとともに、順次選局チャンネ
ルを切換える自動選局を開始する。日本国内のテレビ放
送の場合は１チヤンネルから選局し、順次チャンネルを
変え６２チヤンネルまで選局する。この間、各チャンネ
ルの信号レベルを検出する。−例として、ＲＦＡＧＣ電
圧とＲＦ信号レベルとの関係を第３図に示す。テレビ放
送の電界強度が４ｓ ｄＢ以上になるとＲＦＡＧＣ電圧
が除々に低下し、４６ｄＢ電界下ではｓ、ｏＶあったＲ
ＦＡＧＣ電圧カ、６０ｄＢの電界下では４．ｏＶになっ
ている。一般にテレビ放送はｓ ｏ ｄＢ電界ではＳ／
Ｎ 比も良く美しい画面を表示できるが、電界強度が下
がり４ｓ ｄＢ程になると、ノイズの混入した画像とな
り、さらに電界強度が下がり３ｏ ｄＢ程になるとカラ
ー信号が再生できず、白黒画面としている。When a TV field strength display instruction is input using the operation switch 13, the channel selection circuit 7 notifies the field strength detection circuit 9 of the field strength display mode and starts automatic channel selection for sequentially switching channels. In the case of domestic TV broadcasts in Japan, the user selects channels from channel 1, and then changes channels one by one until channels 62 are selected. During this time, the signal level of each channel is detected. - As an example, the relationship between RFAGC voltage and RF signal level is shown in FIG. When the electric field strength of TV broadcasting exceeds 4 s dB, the RFAGC voltage gradually decreases, and under a 46 dB electric field, it was s, oV.
4. FAGC voltage under 60 dB electric field. It has become oV. In general, television broadcasting is S/ in the so dB electric field.
Although the N ratio is good and a beautiful screen can be displayed, when the electric field strength decreases to about 4 s dB, the image becomes contaminated with noise, and when the electric field strength decreases further to about 3 o dB, color signals cannot be reproduced, resulting in a black and white screen.
自動選局でテレビ放送を自動的に停止させる時はＡＦＣ
信号のＳカーブや、水平パルス、水平同期信号等を検出
して２５ ｄＢ前後の電界強度以上のテレビ放送電波の
あるチャンネルで停止させているが、この方法について
は良く知られているので省略する。When automatically stopping TV broadcasting with automatic channel selection, use AFC.
The S-curve, horizontal pulse, horizontal synchronization signal, etc. of the signal are detected and the system is stopped at channels with TV broadcasting waves with an electric field strength of around 25 dB or higher, but this method is well known and will be omitted here. .
以上により、選局回路７であるチャンネルを選局した時
のＲＦＡＣＩＣの電圧を検出し、この電圧を比較回路８
でＡ／Ｄ コンバータやコンパレータで読み取り、電
界強度検出回路９に電界強度レベルに応じた信号を印加
する。As described above, when the channel selection circuit 7 selects a channel, the voltage of RFACIC is detected, and this voltage is applied to the comparison circuit 8.
The signal is read by an A/D converter or a comparator, and a signal corresponding to the field strength level is applied to the field strength detection circuit 9.
電圧強度検出回路９では、選局回路７から得られるチャ
ンネル番号と比較回路８から得られる電界強度レベルか
らそのチャンネルの電界を判定する。これを１チヤンネ
ルから順に６２チヤンネルまで繰返すことで、受信可能
なチャンネルとその電界強度レベルを判定することがで
きる。The voltage intensity detection circuit 9 determines the electric field of the channel from the channel number obtained from the channel selection circuit 7 and the electric field intensity level obtained from the comparison circuit 8. By repeating this process sequentially from channel 1 to channel 62, receivable channels and their electric field strength levels can be determined.
電界強度検出回路９の電界強度表示データ（チャンネル
番号と電界強度レベル）を画像表示回路１０ＯＩ１０回
路１ｏＨを通シテ、ＣＰＵ１ｏＡに知らしめる。ＣＰＵ
１０ＡはこのデータをメモリのＲＡＭ１ｏＣに記憶する
とともに、画像メモリのＶＲＡＭ１ｏＤへ画像データに
変換して書き込む。The electric field intensity display data (channel number and electric field intensity level) of the electric field intensity detection circuit 9 is passed through the image display circuit 10OI10 circuit 1oH and is notified to the CPU 1oA. CPU
10A stores this data in the RAM 1oC of the memory, and also converts it into image data and writes it into the VRAM 1oD of the image memory.
選局回路７は、全チャンネルの電界強度を測定し終えた
ら自動選局を停止し、決められたチャンネルを選局する
。電界強度検出回路９より、電界強度表示データを受け
た画像表示回路１ｏＩ／）ＣＰＵ１０Ａが画像信号切換
回路１１にテレビ放送の映像信号から電界強度表示デー
タの映像信号に切換える切換信号を送出することにより
、ディスプレイ１２上にはテレビ放送の電界強度表示が
行なわれる。表示例として、ＲＦＡＧＣの電圧が７．６
７以上で自動選局停止するチャンネルは電界強度カ弱、
７．５ Ｖ −４，ＯＶ Ｉｄ、を界強度カ中、４．ｏ
Ｖ以下は電界強度が強という様に文字表示できる。After measuring the electric field strength of all channels, the channel selection circuit 7 stops automatic channel selection and selects a predetermined channel. The image display circuit 1oI/) CPU 10A that receives the field strength display data from the field strength detection circuit 9 sends a switching signal to the image signal switching circuit 11 to switch from the television broadcast video signal to the field strength display data video signal. The electric field strength of television broadcasting is displayed on the display 12. As a display example, the voltage of RFAGC is 7.6
Channels that automatically stop tuning when 7 or higher have weak electric field strength.
7.5 V −4, OV Id, in field strength, 4. o
Below V, characters can be displayed to indicate that the electric field strength is strong.
なお、上記実施例ではＲＦＡＧＣの電圧で電界強度の判
定をしたが、ＩＦＡＧＣの電圧や、映像ＩＦ信号の大小
等でも電界強度が判定でき、これらの１つ又は複数を組
合せて電界強度判定をし、表示することも、本発明に含
まれることは、明白である。In the above embodiment, the electric field strength was determined by the RFAGC voltage, but the electric field strength can also be determined by the IFAGC voltage, the magnitude of the video IF signal, etc., and the electric field strength can be determined by using one or more of these in combination. , it is obvious that the present invention also includes displaying the following.
又、強、中１弱の表示以外に棒グラフ等を用いて、電界
強度レベルをアナログ表示することも出来る０
第４図にディスプレイ１２上に表示した電界強度表示画
面の一例を示す。ここでは、チャンネル番号の隣に強、
中１弱の文字で電界強度レベルを表示している。Further, in addition to displaying strong and medium 1 weak, the electric field strength level can also be displayed in analog form using a bar graph or the like. FIG. 4 shows an example of the electric field strength display screen displayed on the display 12. Here, next to the channel number,
The electric field strength level is displayed in middle-grade letters.
この電界強度表示画面を見て現在受信可能なチャンネル
番号や、そのチャンネルの電界強度レベルをもとに、テ
レビ放送の選局をおこなうことができる。By looking at this field strength display screen, it is possible to select a television broadcast based on the currently receivable channel number and the field strength level of that channel.
次に本発明の他の実施例について述べる。Next, other embodiments of the present invention will be described.
操作スイッチ１３で、電界強度サーチを指示すると、選
局回路７はチャンネルを現在受信中のチャンネルから１
チヤンネルに変えるとともに、電界強度検出回路９に電
界強度サーチが、開始した事を知らせる。そして、電界
強度検出回路っけ比較回路８から電界強度ｌ／ペルを読
み込む準備をするとともに、表示画面を切換え、電界強
度表示画面にするよう画像表示回路１０、画面信号切換
回路１１に指示する。When a field strength search is instructed with the operation switch 13, the channel selection circuit 7 selects one channel from the currently receiving channel.
At the same time, it notifies the electric field strength detection circuit 9 that the electric field strength search has started. Then, preparations are made to read the electric field strength l/pel from the electric field strength detection circuit/comparison circuit 8, and the image display circuit 10 and screen signal switching circuit 11 are instructed to switch the display screen and display the electric field strength display screen.
画像表示回路１ｏは、電界強度サーチが開始されたら、
画像メモリのＶＲＡＭ１ｏＤ上に１チヤンネルから６２
チヤンネルまでの全チャンネル番号を書き込み、ディス
プレイ１２上に表示する。The image display circuit 1o, when the electric field strength search is started,
62 from 1 channel on VRAM1oD of image memory
All channel numbers up to the channel are written and displayed on the display 12.
この表示例をく第６図Ａ〉に示す。選局回路７は画像強
度検出回路９に順次チャンネルデータと受信可能な電界
強度レベルであるか、否かのデータを送信する。電界強
度検出回路９はさらに比較回路８から入力される電界強
度レベルを判定し、そのチャンネルの電界の強、中２弱
を検出するとともに、選局回路７から送られるデータと
ともに、電界強度レベルを画像表示回路１ｏに送信する
。An example of this display is shown in FIG. 6A>. The channel selection circuit 7 sequentially transmits channel data and data indicating whether or not the field strength level is receivable to the image intensity detection circuit 9. The electric field strength detection circuit 9 further determines the electric field strength level input from the comparator circuit 8, detects whether the electric field of the channel is strong or medium 2 weak, and also determines the electric field strength level along with the data sent from the channel selection circuit 7. It is transmitted to the image display circuit 1o.
画像表示回路１１は、順次送られてくるチャンネル番号
と、受信可能な電界レベルか、又電界強度レベルが強１
中１弱かを、メモリのＲＡＭ１ｏＣに書込むと同時に、
画像メモリのＶＲＡＭ１ｏＤに画像データを書込む。こ
の際、テレビ放送のないチャンネル番号は消去するとと
もに、弱電界は赤色、中電界は黄色、強電界は緑色等に
、チャンネル番号又はその周辺の背景を、色を変え表示
させる。The image display circuit 11 receives the sequentially sent channel numbers and determines whether the electric field level is receivable or the electric field strength level is strong 1.
At the same time as writing 1st grade of middle school to RAM1oC of memory,
Write image data to VRAM1oD of image memory. At this time, channel numbers without television broadcasting are deleted, and the channel number or the background around it is displayed in a different color, such as red for a weak electric field, yellow for a medium electric field, green for a strong electric field, etc.
この結果、現在どのチャンネル番号の電界強度を測定し
ているのか、又、その電界強度が、どんな状態かを視認
性よく表示することができる。As a result, it is possible to clearly display which channel number's electric field strength is currently being measured and what state the electric field strength is in.
〈第６図Ｂ〉には３０チヤンネルまで電界強度サーチを
した時の表示示、く第６図Ｃ＞Ｋは電界強度サーチを完
了した時の表示例を示す。<Fig. 6B> shows a display when the electric field strength search is performed up to 30 channels, and Fig. 6C>K shows an example of the display when the electric field strength search is completed.
１．６．３５チヤンネルは電界強度レベルが中、３．４
，８，１０，１２．１９チヤンネルは電界強度レベルが
強でるることを表示色を変えて表示した例である。1.6.35 channel has medium field strength level, 3.4
, 8, 10, 12, and 19 channels are examples in which the display color is changed to indicate that the electric field strength level is strong.
発明の効果
以上のように、本発明のテレビ電界強度表示装置によれ
ば、テレビの全チャンネルの電界強度をディスプレイ上
にチャンネルごとに表示することができ、電波受信状態
を見ることができるとともに、そのデータを記憶してお
き、後で、呼出し表示することも可能となり、自動車等
の車載テレビ受像機に採用すれば他の都市へ移動した時
などでも容易にテレビの受信状態を把握し、選局するこ
とができる。Effects of the Invention As described above, according to the television field strength display device of the present invention, the field strength of all channels of the television can be displayed for each channel on the display, and the radio wave reception status can be viewed. It is possible to store this data and call it up and display it later.If it is adopted in an in-vehicle TV receiver, it will be possible to easily grasp the TV reception status and select it even when moving to another city. can be played.
第１図は本発明の一実施例における電界強度表示装置の
ブロック図、第２図はその画像表示回路の回路図、第３
図はその電界強度レベルを判定するＲＦＡＧＣ電圧と電
界強度の相関図、第４図。
第６図は電界強度レベルを表示したディスプレイ画面の
正面図である。
１・・・・アンテナ、２・・・・・・テレビチューナ、
３・・・・・映像信号処理回路、４・・・・・・映像Ｉ
Ｆ増幅回路、６・・・・・・映像検波回路、６・・・・
・・映像増幅回路、７・・・・・・選局回路、８・・・
・・・比較回路、９・・・・・・電界強度検出回路、１
ｏ・・・・画像表示回路、１１・・・・・・画像信号切
換回路、１２・・・・・・ディスプレイ、１３・・・・
・・操作スイッチ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
２５ ４５ ６θ
→遺ｌザ４土毛ソ１≧Ｅ ＜ｔｙｓン第４図
務５図FIG. 1 is a block diagram of a field strength display device according to an embodiment of the present invention, FIG. 2 is a circuit diagram of its image display circuit, and FIG.
The figure is a correlation diagram of RFAGC voltage and electric field strength for determining the electric field strength level, FIG. 4. FIG. 6 is a front view of a display screen displaying field strength levels. 1...Antenna, 2...TV tuner,
3...Video signal processing circuit, 4...Video I
F amplifier circuit, 6... Video detection circuit, 6...
...Video amplification circuit, 7...Tuition selection circuit, 8...
... Comparison circuit, 9 ... Electric field strength detection circuit, 1
o... Image display circuit, 11... Image signal switching circuit, 12... Display, 13...
...Operation switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 25 45 6θ → Ilza 4 Domo So 1 ≧ E <tyson 4 Works 5
Claims (6)
るテレビチューナと、上記映像ＩＦ信号を画像信号に変
換する映像信号処理回路と、上記テレビ放送電波の電界
強度に応じて変化する信号により電界強度に応じた信号
を出力する比較回路と、上記テレビチューナより希望の
チャンネルの信号を選局する選局回路と、上記選局回路
から選局中のチャンネル番号に対応する信号を、上記比
較回路より電界強度レベルに応じた信号を、それぞれ読
込む電界強度検出回路と、この電界強度検出回路の出力
である電界強度データを映像信号に変換する画像表示回
路とを具備し、上記画像表示回路からの画像信号をディ
スプレイに加えてチャンネル毎の電界強度レベルを上記
ディスプレイに表示するようにした電界強度表示装置。(1) A TV tuner that receives TV broadcast radio waves and converts them into video IF signals, a video signal processing circuit that converts the video IF signals into image signals, and a signal that changes according to the electric field strength of the TV broadcast radio waves. A comparison circuit that outputs a signal according to the electric field strength, a tuning circuit that selects a signal of a desired channel from the TV tuner, and a signal corresponding to the channel number being selected from the tuning circuit are compared as described above. The image display circuit includes an electric field strength detection circuit that reads signals corresponding to the electric field strength level from the circuit, and an image display circuit that converts the electric field strength data output from the electric field strength detection circuit into a video signal. An electric field strength display device which adds an image signal from the above to the display and displays the electric field strength level of each channel on the display.
強度レベル表示用の画像信号とを切換えて出力する映像
信号切換回路を具備し、共通のディスプレイ上にテレビ
放送の受信映像と電界強度レベル表示画面とを表示可能
ならしめた特許請求の範囲第１項記載の電界強度表示装
置。(2) Equipped with a video signal switching circuit that switches and outputs the video signal obtained by receiving the TV broadcast and the image signal for displaying the electric field strength level, so that the received video of the TV broadcast and the electric field are displayed on a common display. The electric field strength display device according to claim 1, which is capable of displaying an intensity level display screen.
に全チャンネルのチャンネル番号を表示し、選局回路に
て受信チャンネルを順次選局して各チャンネル毎の電界
強度レベルを検出し、その検出出力にて信号の無いチャ
ンネルの上記番号の表示を消去し、選局可能な電界強度
レベルのチャンネルの番号表示のみを残して表示するよ
うにした特許請求の範囲第１項記載の電界強度表示装置
。(3) When electric field strength detection starts, the channel numbers of all channels are displayed on the display, and the channel selection circuit sequentially selects the receiving channels to detect the electric field strength level of each channel. The field strength display device according to claim 1, wherein the display of the number of the channel with no signal is erased at the output, and only the number display of the channel with a selectable field strength level is left and displayed. .
ャンネル毎の電界強度レベルを検出し、この電界強度レ
ベルに応じて表示したチャンネル番号の表示色又はその
周辺の色を変えて電界強度レベルを表示するようにした
特許請求の範囲第１項記載の電界強度表示装置。(4) The channel selection circuit sequentially selects the receiving channels and detects the electric field strength level for each channel, and changes the display color of the displayed channel number or the color around it according to the electric field strength level to change the electric field. An electric field strength display device according to claim 1, which displays an intensity level.
に全チャンネル番号を表示し、選局回路にて受信チャン
ネルを順次選局して各チャンネル毎の電界強度レベルを
検出し、この電界強度レベルに応じてチャンネル番号の
色又はその周辺の背景色を変えて、電界強度レベルを表
示するようにした特許請求の範囲第１項記載の電界強度
表示装置。(5) When you start detecting the electric field strength, all channel numbers are displayed on the display, and the channel selection circuit sequentially selects the receiving channels to detect the electric field strength level of each channel. 2. The electric field strength display device according to claim 1, wherein the electric field strength level is displayed by changing the color of the channel number or the background color around it depending on the channel number.
ャンネル毎の電界強度レベルを検出し、この電界強度レ
ベルに応じて異なる文字または記号を、表示したチャン
ネル番号に隣接して表示することにより電界強度レベル
を表示するようにした特許請求の範囲第１項記載の電界
強度表示装置。(6) The channel selection circuit sequentially selects the receiving channels, detects the field strength level of each channel, and displays different characters or symbols next to the displayed channel number depending on the field strength level. 2. The electric field strength display device according to claim 1, wherein the electric field strength level is displayed by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009283A JPS62168477A (en) | 1986-01-20 | 1986-01-20 | Electric field strength display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009283A JPS62168477A (en) | 1986-01-20 | 1986-01-20 | Electric field strength display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62168477A true JPS62168477A (en) | 1987-07-24 |
| JPH0525431B2 JPH0525431B2 (en) | 1993-04-12 |
Family
ID=11716145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61009283A Granted JPS62168477A (en) | 1986-01-20 | 1986-01-20 | Electric field strength display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62168477A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4033839A1 (en) * | 1989-10-24 | 1991-04-25 | Mitsubishi Electric Corp | Channel indicator for TV and radio receiver - has switching pattern, selecting receivable station and optically displaying on screen |
| JP2006005757A (en) * | 2004-06-18 | 2006-01-05 | Sony Corp | Channel selection device and channel setting method |
| JP2015084596A (en) * | 1999-06-16 | 2015-04-30 | トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ | Real-time signal strength measurement and display of digital television signal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50115923A (en) * | 1974-02-22 | 1975-09-10 | ||
| JPS55100375U (en) * | 1978-12-29 | 1980-07-12 | ||
| JPS6068758U (en) * | 1983-10-17 | 1985-05-15 | 三菱自動車工業株式会社 | CRT display device |
| JPS611113A (en) * | 1984-06-14 | 1986-01-07 | Matsushita Electric Ind Co Ltd | Channel selecting device |
| JPS611114A (en) * | 1984-06-14 | 1986-01-07 | Matsushita Electric Ind Co Ltd | Channel selecting device |
-
1986
- 1986-01-20 JP JP61009283A patent/JPS62168477A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50115923A (en) * | 1974-02-22 | 1975-09-10 | ||
| JPS55100375U (en) * | 1978-12-29 | 1980-07-12 | ||
| JPS6068758U (en) * | 1983-10-17 | 1985-05-15 | 三菱自動車工業株式会社 | CRT display device |
| JPS611113A (en) * | 1984-06-14 | 1986-01-07 | Matsushita Electric Ind Co Ltd | Channel selecting device |
| JPS611114A (en) * | 1984-06-14 | 1986-01-07 | Matsushita Electric Ind Co Ltd | Channel selecting device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4033839A1 (en) * | 1989-10-24 | 1991-04-25 | Mitsubishi Electric Corp | Channel indicator for TV and radio receiver - has switching pattern, selecting receivable station and optically displaying on screen |
| US5537158A (en) * | 1989-10-24 | 1996-07-16 | Mitsubishi Denki Kabushiki Kaisha | Channel display device for receiver using a touch sensitive overlay |
| JP2015084596A (en) * | 1999-06-16 | 2015-04-30 | トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ | Real-time signal strength measurement and display of digital television signal |
| JP2006005757A (en) * | 2004-06-18 | 2006-01-05 | Sony Corp | Channel selection device and channel setting method |
| JP4556508B2 (en) * | 2004-06-18 | 2010-10-06 | ソニー株式会社 | Channel tuning apparatus and channel setting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0525431B2 (en) | 1993-04-12 |
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