TW493195B - Tracking cathode ray tube circuit having a modulator demodulator - Google Patents
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- TW493195B TW493195B TW89125488A TW89125488A TW493195B TW 493195 B TW493195 B TW 493195B TW 89125488 A TW89125488 A TW 89125488A TW 89125488 A TW89125488 A TW 89125488A TW 493195 B TW493195 B TW 493195B
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493195 五、發明說明(1) 本發明係關於一追陰極射管電路,包括自其獲得一追 信號之被連接至一無陰影罩蔽之追陰極射線管的追# 裝置。 由專利G B - 1 4 0 3 0 6 1可獲悉此種追泛泰陰極射線管電路, 亦指稱其為指標管。本文所揭露者係一所謂無陰影罩蔽之 追孓家陰極射線管(CRT ),其中一回授控制迴路可控制在 其前板上電子波束之正確著落定點。使用一定位在前板内 側上之一導執結構或感測器,可測量此定點之位置。當沿 執道掃描一定點時,依靠定點位置之一追5象信號會升高, 可使用此追玉|信號以產生一定點位置輸出信號供在保持定 點在執道上之上偏轉器用。按此種方式設計導軌 結構即可產生相對於地係在一甚高電壓之調制追嫁信號方 式。熟知一具有一恒定手搖俯仰之導執結構因而造成可由 在載波頻率之調幅信號所構成之一誤差信號。然後沒有混 淆可自視頻調制來區別誤差信號。 但已知之無陰影罩蔽追|陰極射線管電路之一缺點是: 除追結構之形狀以外’調頻與調制深度相對於視頻調制 必須正確地選/擇以便防止不希望在CRT螢幕上可見到冬膺、 像。 因此本發明之一目的在提供一陰極射線管電路有一較少 關鍵性結構統計與内部形狀且未引起膺像或必需要内部安 裝與規定之調制數量與特徵之精細調諧。 欲達此目的,按本發明之追$象陰極射線管電路,其特徵 在:追3象裝置包括一調制器一解調器電路。按本發明追J象493195 V. Description of the invention (1) The present invention relates to a tracking cathode ray tube circuit, which includes a tracking # device from which a tracking signal is obtained and is connected to a shadowless cathode ray tube. The patent G B-1 40 0 0 6 1 can be learned that this type of tracking Thai cathode ray tube circuit, also known as the indicator tube. Disclosed in this article is a so-called shadowless cathode ray tube (CRT), in which a feedback control loop can control the correct landing position of the electron beam on its front panel. The position of this fixed point can be measured using a guide structure or sensor positioned on the inside of the front plate. When scanning a certain point along the road, the signal of chasing 5 images will increase depending on one of the fixed points. You can use this chase signal to generate a certain point position output signal for the deflector to keep the fixed point on the road. Designing the rail structure in this way can produce a modulating pursuit signal with a very high voltage relative to ground. It is well known that a guide structure with a constant hand-tilt pitch results in an error signal that can be composed of amplitude-modulated signals at the carrier frequency. Then there is no confusion to distinguish the error signal from the video modulation. However, one of the disadvantages of the known shadowless masking | cathode ray tube circuit is: In addition to the shape of the chasing structure, the frequency modulation and modulation depth must be properly selected / selected relative to the video modulation in order to prevent the winter Alas, like. It is therefore an object of the present invention to provide a cathode ray tube circuit with fewer key structural statistics and internal shapes without causing artifacts or requiring fine tuning of internal installation and prescribed modulation quantity and characteristics. To achieve this, according to the present invention, an image-recovering cathode ray tube circuit is characterized in that the image-recovering device includes a modulator and a demodulator circuit. Pursuing J Elephant According to the Invention
493195 五、發明說明(2) CRT電路之一優點是:就内部上,無陰影罩蔽追泛f CRT管不 需調整,因為一未調制/基本波段追在象信號由於本發明之 電路内無陰影罩蔽追®CRT管而產生。在追絲CRT管外面現 稱提供追泛象裝置,同時包括與其產生一調制追玉象信號之調 制器解調器裝置可有利地及容易向下轉換此種調制追5#信 號由陽極電位(典型上2 5 kV )至通地電位。 易實行之本發明追$|XRT電路之一實例,其特徵在:被 連接至無陰影罩蔽陰極射線管之調制器,與解調器係由一 第一AC耦合共同分開。此種AC耦合有效地係屬於一習用型 ,例如,一電氣,磁性,光學或聲耦合。 按本發明追J象CRT電路之進一步實例其特徵在:追裝 置包括被耦合至調制器與解調器兩者之一振盪器。本發明 之追$|sCRT電路之一優點:為驅動調制器以及解調器只需 要一個振盪器。 按本發明CRT電路之進一步實例其特徵在:連接振盪器 至調制器並經由一第二AC耦合將其耦合至解調器。本發明 追電路之此實例的一優點是:可消除可能頻率與相 位問題,因為身別是分別通過追泛象信號與振盪器信號之黾 A C耦合器上之相位差係相等。此可提供解調器之一簡單而 正確同步檢測之可能性。 指標CRT控制電路之進一步實例其特徵在:振盪器係耦 合至DC/AC轉換器,此轉換器必然也被耦合至DC電源且其 轉換器輸出係耦合至第二AC耦合器。按此實例,有關之AC 耦合器可同時提供一供應電壓且分別提供經調制或調制信493195 V. Description of the invention (2) One of the advantages of the CRT circuit is: internally, there is no shadow mask to track the f. The CRT tube does not need to be adjusted because an unmodulated / basic band is chasing the image signal The shadow mask is created by chasing the CRT tube. It is said to provide a tracking image device outside the tracking CRT tube, and it also includes a modulator demodulator device that generates a modulation tracking signal, which can advantageously and easily down-convert this modulation tracking 5 # signal from the anode potential ( Typically 25 kV) to ground potential. An easy-to-implement example of the XRT circuit of the present invention is characterized in that the modulator connected to the shadowless cathode-ray tube is separated from the demodulator by a first AC coupling. This AC coupling is effectively a conventional type, for example, an electrical, magnetic, optical or acoustic coupling. A further example of a tracking CRT circuit according to the present invention is characterized in that the tracking device includes an oscillator coupled to one of the modulator and the demodulator. One of the advantages of the sCRT circuit of the present invention is that only one oscillator is needed to drive the modulator and demodulator. A further example of a CRT circuit according to the invention is characterized in that the oscillator is connected to the modulator and coupled to the demodulator via a second AC coupling. An advantage of this example of the tracking circuit of the present invention is that the possible frequency and phase problems can be eliminated, because the phase difference on the 黾 A C coupler of the tracking signal and the oscillator signal is equal, respectively. This provides the possibility of one of the demodulator's simple and correct synchronization detection. A further example of the index CRT control circuit is characterized in that the oscillator is coupled to a DC / AC converter, this converter must also be coupled to a DC power source and its converter output is coupled to a second AC coupler. According to this example, the relevant AC coupler can simultaneously provide a supply voltage and separately provide a modulated or modulated signal.
493195 五、 發明說明(3) 號 至 解 調 器 或調制器沒有 需要之 額外電路。 有 利 地 y 追5|crt電路之幾種變體與實例係可行的 〇 AC 岸禺 合 係 再 度 屬於習用型, 諸如, 一電容性,電感 的, 光 學 或 聲 波 耦 合 。一般係類比 之調制 包括不同之調制 型 , 諸 如 AM , FM PM, DSB, SSB ,VSB ,FSK等等。 按 進 一 步 之較佳實例, 其中AC 耦合係一電感耦 合, 此 耦 合 係 有 效 地 配置為顯示裝 置高壓 變壓器之一額外 中心 抽 頭 y 諸 如 一 電 視裝置。此可 節省完 全之電感耦合。 無 陰 影 罩 蔽追茨象CRT電3 各之另- -實例其特徵在 :解調器 包 括 一 AM 檢 測電路與一相 位比較 器俾分別提供有 關自 執 道 中 心 有 關 電 子波束之位移 與有關 位移方向之資訊 〇此 實 例 可 提 供 有 關 該單獨分別電 子波束 之位移,速率及 航向 等 之 詳 細 資 訊 〇 本 發 明 亦 係關於一顯示 裝置, 諸如一電視裝置 ,包 括 為 專 利 中 請 第 1至9項所界定 之追5象 ,陰極射線管電路 其中 陰 極 射 線 管 電 路 包括被連接至 無陰影 罩蔽追陰極射 線管 之 耦 合 裝 置 俾 白 其獲得一追嫁^ 信號, 此裝置之特徵在 ,柄 合 裝 置 包 括 一 調 制>器解調器電 路。 一 連 同 其 額 外優點現說明 本發明 之追電路與顯示裝 置 同 時 參 考附圖,其中 藉相同 參考數字指明相 似組 件 y 附 圖 說 明 • 圖 1顯示備有無陰影罩蔽追1陰極射線管之一部分顯示 裝 置 圖 及 圖2顯示追跋電路包括用於圖1 顯示裝置之一電 源器 與493195 V. Description of the Invention (3) No additional circuit required to demodulator or modulator. Advantageously, several variants and examples of the 5 | crt circuit are feasible. AC shore coupling systems are once again customary, such as a capacitive, inductive, optical, or acoustic coupling. Generally analog modulations include different modulation types, such as AM, FM PM, DSB, SSB, VSB, FSK, and so on. According to a further preferred example, the AC coupling is an inductive coupling, and the coupling is effectively configured as an extra center tap of a high voltage transformer of a display device, such as a television device. This saves complete inductive coupling. The shadow-free masking and chasing elephant CRT electric 3 is different-the example is characterized in that the demodulator includes an AM detection circuit and a phase comparator, which provide the relevant electronic beam displacement and the relevant displacement direction of the center of the self-acting track, respectively. Information. This example can provide detailed information about the displacement, velocity, and heading of the individual separate electron beams. The invention also relates to a display device, such as a television device, including those defined in claims 1 to 9 of the patent The 5th image, the cathode ray tube circuit, wherein the cathode ray tube circuit includes a coupling device that is connected to a shadowless masking cathode ray tube, which obtains a signal of chase ^, the characteristic of this device is that the handle device includes a Modulator & demodulator circuit. Together with its additional advantages, the tracking circuit and display device of the present invention will now be described with reference to the accompanying drawings, in which similar components are indicated by the same reference numerals. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a portion of a display device equipped with a shadowless mask 1 Figure and Figure 2 show that the tracing circuit includes a power supply for one of the display devices of Figure 1 and
五 、發明說明(4)V. Description of the invention (4)
掮^盪器之詳圖 E CRT I w ^ 圖1顯示備有無,一1部追^本陰極射線管,以後簡稱為 L K T 1 ,夕一顯示泵臭 叩分示m 壯w h ^ Μ 之 ώ 0狀置盥抽、由圖。裝置D係提供一以追 lls電路2形式之追轉装破連接至追较雷踗?之一】自祕 CRT#制雷路3。追錄電路2可施力口 電路2之1 乂 &制電路f 々步*也加一來自CRT 1之追緣信號 控制電3。〔有兒二可驅動CRT i 器4之控 制電路3。CRT 1係屬乂,有陰影罩銶々相加 孙山—> CRT i裡面之:㈡測器結構s可測量電子;束之 位置。當沿結構S之:,描:定點時,即產生追踩信號 τ 1為3定點位置改正供用於追ί象CRT控制電路3。 圖1更顯示追泛象電路2之示圖,包括調制輸入追緣信號T i 一調制器5該信號T i係堆疊在一甚高電壓以獲得一調制追 |象信號Tm,輸出低壓調制追勝信號Tml之一第一AC耦合6, 與獲得基本波段/未調制追3象信號To之一解調器7。可耦 合係由A C耦合6所共同分開之調制器5與解調器7至提供追 腺信號Tm及Tm 1之載波頻率的〆振盪器8。按所示情形,直 接耦合振盪器8至振盪器5與經由一第二AC耦合9至解調器 7。若有需要—,―可直接耦合振盪器8經由第二AC耦合至.解調 器7與調制器5,若進行時間延遲與相位延遲並未發生問 題。Detailed drawing of the oscillating device E CRT I w ^ Figure 1 shows whether there is one or not, a cathode ray tube, hereinafter referred to as LKT 1, and the first display shows the pump odor 叩 ^ wh Shaped toilet pump, from the picture. Device D provides a tracking device in the form of a tracking circuit 2 that is connected to the tracking device? One] Self Secret CRT # Thunder Road 3. Tracking circuit 2 can be used to force the circuit 1 of the circuit 2 & control circuit f step * also add a tracking signal from the CRT 1 control circuit 3. [There are two control circuits 3 that can drive the CRT i 4. CRT 1 is a kind of cymbal, with a shadow cover. Sunshan —> In CRT i: the detector structure s can measure electrons; the position of the beam. When following the structure S :, description: fixed point, the chase step signal τ 1 is generated as 3 fixed point position correction for the tracking CRT control circuit 3. FIG. 1 further shows a diagram of a tracking circuit 2 including a modulation input tracking signal T i-a modulator 5 which is stacked at a very high voltage to obtain a modulation tracking image signal Tm and output a low-voltage modulation tracking One of the win signals Tml is the first AC coupling 6, and one of the demodulator 7 is obtained to obtain the basic band / unmodulated tracking signal To. The coupler is a modulator 5 and a demodulator 7 which are separated by an AC coupling 6 to a chirp oscillator 8 which provides a carrier frequency of the tracking signals Tm and Tm1. As shown, oscillators 8 to 5 are directly coupled and demodulator 7 is coupled 9 via a second AC coupling. If necessary, the oscillator 8 can be directly coupled to the demodulator 7 and the modulator 5 via the second AC. If time delay and phase delay are performed, no problem occurs.
圖2顯示追電路2之詳示圖,包括一DC電源器10,其與 振盪器一同係耦合至一])C/ Ac轉換器11。轉換器11可轉換 DC供給電壓為由一高頻振逢器信號所斷流之AC電壓,此電 壓亦係追系象信號之(解)調頻。躺合轉換器輸出至第二AC 493195 五、發明說明(5) 搞合9,按此情況此搞合係一電感性搞合,但是此輕合, 為第一 AC耦合,亦可為一電容性耦合以便使通地與耦合9 次級側上高電位絕緣。可耦合次級側至整流器1 2與至一濾 波電路1 3俾供給一 D C電源電壓至解調器7。可自變壓器耦 合9次級側獲得振盪器信號並經由放大器1 4將其饋至調制 器5。調制器5亦可接收來自A C耦合6之調制信號以便產生 控制電路3所需之一輸出追泛|信號To。 對熟知此技藝人員均悉幾種實例與變體是有可能。按上 述情況直接耦合振盪器8至解調器7,且比對圖1及2所示實 例可使用一 DC電源電壓俾供給電源自傳電位側至AC耦合6 及9之高電位側。按該情況,可不必改變熟知之EHT變壓器 。而解調器7亦可包括一均知之AM檢測電路與一相位比較 器俾分別提供自磁執中心有關電子波束定點之位移與有關 位移方向之資訊。但可取代使用一同步檢測器。而非使用 一單獨變壓器,在一極高壓變壓器之額外分接頭上包括耦 合9,在現行顯示裝置内諸如電視裝置,均内裝有此項變 壓器。可配置調制器一調制器電路5,7供類比調制,諸如 調幅(AM ) 周頻(FM ),調相(PM ),雙旁頻帶肩、制〜 (DSB ),單旁頻帶調制(SSB ),退化旁頻帶調制(VSB) ,移相發報(FSK )等等。FIG. 2 shows a detailed diagram of the tracking circuit 2 including a DC power supply 10, which is coupled to an oscilloscope 11 together with the oscillator. The converter 11 can convert the DC supply voltage to an AC voltage interrupted by a high-frequency vibrator signal, and this voltage also follows the (de) frequency modulation of the image signal. Rectangular converter output to the second AC 493195 V. Description of the invention (5) Engage 9. According to this situation, this engagement is an inductive engagement, but this light coupling is the first AC coupling, and it can also be a capacitor. It is sexually coupled in order to insulate the ground from the high potential on the secondary side of the coupling 9. The secondary side can be coupled to the rectifier 12 and a filter circuit 13 'to supply a DC power supply voltage to the demodulator 7. The oscillator signal can be obtained from the secondary side of the transformer coupling 9 and fed to the modulator 5 via an amplifier 14. The modulator 5 may also receive a modulation signal from the AC coupling 6 to generate one of the output tracking signals | signals To required by the control circuit 3. Several examples and variations are possible for those skilled in the art. Directly couple the oscillator 8 to the demodulator 7 as described above, and compare the example shown in Figs. 1 and 2 with a DC power supply voltage 俾 from the autotransport potential side of the power supply to the high potential side of the AC couplings 6 and 9. In this case, it is not necessary to change the well-known EHT transformer. The demodulator 7 may also include a well-known AM detection circuit and a phase comparator, which respectively provide information about the fixed position of the electronic beam and the direction of the displacement from the magnetic actuator center. But instead of using a sync detector. Instead of using a separate transformer, an additional tap on a high-voltage transformer includes a coupling 9, which is incorporated in current display devices such as television devices. Configurable modulator-modulator circuits 5, 7 for analog modulation, such as amplitude modulation (AM) cycle frequency (FM), phase modulation (PM), double sideband shoulder, system ~ (DSB), single sideband modulation (SSB) , Degraded sideband modulation (VSB), phase shift report (FSK), etc.
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