JPS6236994A - Device for automatically correcting hue - Google Patents
Device for automatically correcting hueInfo
- Publication number
- JPS6236994A JPS6236994A JP60176551A JP17655185A JPS6236994A JP S6236994 A JPS6236994 A JP S6236994A JP 60176551 A JP60176551 A JP 60176551A JP 17655185 A JP17655185 A JP 17655185A JP S6236994 A JPS6236994 A JP S6236994A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- color difference
- axis
- difference signal
- 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
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は色相を自動的に補正することの出来るカラーテ
レビジョン受像機の色相自動補正装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an automatic hue correction device for a color television receiver that can automatically correct the hue.
（ロ）従来の技術
自動的に色相の補正を行う自動色相補正装置は、特願昭
６０−５０８６９として本願と同一の出願人により既に
出願されている。前記装置は、第３図に示す如きもので
あり入力端子（１）に印加された複合映像信号は、第１
帯域増幅回路（２）及び第２帯域増幅回路（３）で増幅
され、前記第２帯域増幅回路（３）でクロマ信号とバー
スト信号に分離される。そして前記クロマ信号は復調回
路０りに印加されて復調され、前記バースト信号は位相
比較器（５）に印加されてＣＷ（局部副搬送波）信号を
作成する為に用いられるとともに、ｉｃｅ （自動クロ
マ制御）回路（４）に印加されて利得制御の為に用いら
れる。(B) Prior Art An automatic hue correction device that automatically corrects hue has already been filed as Japanese Patent Application No. 60-50869 by the same applicant as the present application. The device is as shown in FIG. 3, and the composite video signal applied to the input terminal (1) is
The signal is amplified by a band amplification circuit (2) and a second band amplification circuit (3), and separated into a chroma signal and a burst signal by the second band amplification circuit (3). The chroma signal is then applied to a demodulation circuit 0 to be demodulated, and the burst signal is applied to a phase comparator (5) to be used to create a CW (local subcarrier) signal and an ice (auto chroma) signal. control) circuit (4) and used for gain control.
前記位相比較器（５）は、ＶＣＯｆ６１とともにＰＬＬ
回路のを構成しており、前記バースト信号と前記■Ｃｏ
（６１の出力信号とが、位相比較器（５）で位相比較さ
れる様に成されているので、前記Ｖ ＣＯｔ６１の出力
端にはバースト信号に同期し１こＣＷ倍信号発生する。The phase comparator (5) is connected to the PLL together with VCOf61.
The burst signal and the ■Co
(Since the phase comparator (5) compares the phase of the output signal of VCOt61, a 1-CW signal is generated at the output terminal of VCOt61 in synchronization with the burst signal.
前記ＣＷ倍信号、色相調整回路（９）を介して第１及び
第２移相回路ａα及びＵυに印加される。第１及び第２
移相回路Ｑｌ及び０１）は前記ＣＷ倍信号位相がそれぞ
れφ１及びφ、ずれｆｓｃＷ肚−ｙ信号及びＣＷｓ−ｖ
信号を発生する。そして前記ＣＷ菖−ｖ信号及びＣＷＩ
−Ｙ信号が、復調回路０２に印加されることにより、そ
れぞれＲ−Ｙ色差信号及びＢ −Ｙ色差信号が復調され
る。また復調されたＲ−Ｙ色差信号とＢ−Ｙ色差信号と
をマトリクスすることにより（Ｊｘ−Ｙ色差信号が得ら
れる。前記Ｒ−Ｙ色差信号、Ｇ −Ｙ色差信号及びＢ−
Ｙ色差信号は、それぞれ第１．第２及び第３出力端子０
３１ 、 Ｑ４）及び０５）から後段に伝送されカラー
再生の為に用いられる。The CW multiplied signal is applied to the first and second phase shift circuits aα and Uυ via the hue adjustment circuit (9). 1st and 2nd
The phase shift circuits Ql and 01) have the CW multiplied signal phases φ1 and φ, respectively, and the deviations fscW 肚-y signal and CWs-v
Generate a signal. and the CW irises-v signal and the CWI
By applying the -Y signal to the demodulation circuit 02, the R-Y color difference signal and the B-Y color difference signal are demodulated, respectively. Furthermore, by matrixing the demodulated R-Y color difference signal and the B-Y color difference signal, a Jx-Y color difference signal is obtained.
The Y color difference signals are the first . 2nd and 3rd output terminal 0
31, Q4) and 05) to the subsequent stage and used for color reproduction.
第１出力端子０□□□に得られるＲ−Ｙ色差信号と第３
出力端子０つに得られるＢ−Ｙ色差信号とは、第１合成
回路ＯＱで合成され、その出力端子にＱ信号が発生する
。そして前記Ｑ信号は、増幅回路側で増幅され、調整信
号として平均調整回路（イ）に供給される。前記平均調
整回路（２１は、前記調整信号を平滑化し、色相調整回
路（９）に平均調整信号として供給するものである。又
、前記Ｒ−Ｙ色差信号とＢ−Ｙ色差信号とは、第２合成
回路ＯＤに印加され、Ｒ−・Ｙ色差信号と反転されたＢ
−Ｙ色差信号が合成され、該第２合成回路０ηの出力端
子にＩ信号が発生する。そして該Ｉ信号は、制御回路α
■に印加され、該制御回路ＯＩで基準信号（Ｖｒｅｆ）
と比較される。いま前記■信号のレベルが前記基準信号
のレベルよりも大であるとすれば、前記制御回路ＯＩか
ら制御信号が発生し、前記増幅回路（１）ツが動作状態
になり前記Ｑ信号を増幅して前記調整信号を発生する。The R-Y color difference signal obtained at the first output terminal 0□□□ and the third
The B-Y color difference signal obtained at the output terminal 0 is synthesized by the first synthesis circuit OQ, and a Q signal is generated at the output terminal. The Q signal is amplified on the amplifier circuit side and supplied as an adjustment signal to the average adjustment circuit (a). The average adjustment circuit (21) smoothes the adjustment signal and supplies it to the hue adjustment circuit (9) as an average adjustment signal.The R-Y color difference signal and the B-Y color difference signal are 2 is applied to the synthesis circuit OD, and the R-Y color difference signal and the inverted B
-Y color difference signals are combined, and an I signal is generated at the output terminal of the second combining circuit 0η. Then, the I signal is transmitted to the control circuit α
(2), and the reference signal (Vref) is applied to the control circuit OI.
compared to Now, if the level of the ■ signal is higher than the level of the reference signal, a control signal is generated from the control circuit OI, and the amplifier circuit (1) becomes operational and amplifies the Q signal. to generate the adjustment signal.
そして前記調整信号は、平均調整回路−で平均化され、
前記色相調整回路（９）に供給される。Then, the adjustment signal is averaged by an average adjustment circuit,
The signal is supplied to the hue adjustment circuit (9).
それに対し前記Ｉ信号のレベルが前記基準信号のレベル
よりも小であると、前記制御信号が発生せず、増幅回路
０印が動作しないので、色相の自動補正が行なわれない
。On the other hand, if the level of the I signal is lower than the level of the reference signal, the control signal is not generated and the amplifier circuit 0 mark does not operate, so that automatic hue correction is not performed.
次に色相の自動補正動作に付、説明する。いま第４図に
Ａで示す■軸からα度ずれているクロマ信号が存在する
とすれば、Ｑ信号のレベルはＢになり、■信号のレベル
はＣになる。前記■信号のレベルＣを基準信号（Ｖ ｒ
ｅｆ ）のレベルよりも大とすれば、Ｑ信号は増幅回路
側で増幅され、平均調整回路（１）で平滑化され、平均
調整信号として色相調整回路（９）に印加される。前記
平均調整信号が前記色相調整回路（９）に印加されると
、前記平均調整信号のレベルに応じてＣＷ倍信号位相が
回転し、それに応じて第１及び第２位相回路０Ｉ及び旧
）の出力信号である＝ＣＷｌ−Ｔ信号及びＣＷｍ−Ｙ信
号の位相も回転する。これは復調回路０４で復調軸が回
転することを意味し、第５図に示す如く、Ｒ−Ｙ軸がα
度回転して（Ｒ−Ｙ） 軸となり、Ｂ −Ｙ軸もα度
回転して（Ｂ−Ｙ） 軸になる。この場合、Ｑ信号な
Ｒ−Ｙ色差信号とＢ−Ｙ色差信号とから作成しているの
で、前記復調軸の回転に応じてＩ軸及びＱ軸も回転し、
補正が完了した時点においてはクロマ信号ＡがＩ軸に重
なり、Ｑ信号のレベルが零になる。言い換えればこの自
動補正はＱ信号のレベルが小となる様に復調軸を回転さ
せるということになる。Next, the automatic hue correction operation will be explained. If there is a chroma signal that is deviated by α degree from the ■ axis shown by A in FIG. 4, the level of the Q signal will be B, and the level of the ■ signal will be C. The level C of the above ■signal is set as a reference signal (V r
ef ), the Q signal is amplified by the amplifier circuit, smoothed by the average adjustment circuit (1), and applied as an average adjustment signal to the hue adjustment circuit (9). When the average adjustment signal is applied to the hue adjustment circuit (9), the CW multiplied signal phase rotates according to the level of the average adjustment signal, and the first and second phase circuits (0I and OLD) rotate accordingly. The phases of the output signals CWl-T and CWm-Y are also rotated. This means that the demodulation axis rotates in the demodulation circuit 04, and as shown in FIG.
It rotates by degrees to become the (R-Y) axis, and the B-Y axis is also rotated by α degrees to become the (B-Y) axis. In this case, since the Q signal is created from the R-Y color difference signal and the B-Y color difference signal, the I-axis and Q-axis also rotate according to the rotation of the demodulation axis.
When the correction is completed, the chroma signal A overlaps the I axis, and the level of the Q signal becomes zero. In other words, this automatic correction rotates the demodulation axis so that the level of the Q signal becomes small.
色相の自動補正は、所定のレベル以上のＩ信号の存在時
のみ行なわれる。従って、クロマ信号がＩ軸の近傍すな
わち肌色に近い場所に存在するときのみ、色相の自動補
正が行なわれることになる。Automatic hue correction is performed only when there is an I signal of a predetermined level or higher. Therefore, automatic hue correction is performed only when the chroma signal exists near the I-axis, that is, near the skin color.
また、色相の自動補正はＱ信号のレベルに応じて行なわ
れ、前記Ｑ信号が犬のときは大きな補正が、小のときは
小さな補正が行なわれるので、前記自動補正は前記Ｑ信
号のレベルにのみ関係するものとなる。Further, automatic correction of hue is performed according to the level of the Q signal, and when the Q signal is dog, a large correction is performed, and when it is small, a small correction is performed, so the automatic correction is performed depending on the level of the Q signal. It will only be relevant.
ｌ／１ 発明が解決しようとする問題点第３図の回路
を復調回路０２１．移相回路（１０１及び旧）、色相調
整回路（９）はＩＣＩに、第１及び第２合成回路顛及び
ａで、制御回路α■、増幅回路０８はＩＣ２に内蔵され
るように、ＩＣ（集積口ｗｒ）化した場合、ＩＣＩとし
ては多種類のＩＣがあり復調角や復調比がそれぞれ異な
る。又、同一のＩＣの場合でもばらつきにより変化する
。ＩＣ２の第１合成回路についても同様である。その為
、Ｒ−Ｙ色差信号とＢ−Ｙ色差信号から合成して得られ
るＱ信号はＱ軸上に一致しない場合があり、正しい補正
が行なわれない。その為、Ｑ信号をＱ軸上に一致させる
必要があるが、第１合成回路がＩＣの中に内蔵されてい
る場合は、調整ができないという問題があった。l/1 Problems to be Solved by the Invention The circuit of FIG. 3 is used as a demodulator circuit 021. The phase shift circuit (101 and old) and hue adjustment circuit (9) are built into ICI, the first and second synthesis circuits and a, and the control circuit α■ and amplifier circuit 08 are built into IC2. In the case of integration (wr), there are many types of ICIs, each with a different demodulation angle and demodulation ratio. Moreover, even in the case of the same IC, it changes due to variations. The same applies to the first synthesis circuit of IC2. Therefore, the Q signal obtained by combining the RY color difference signal and the BY color difference signal may not match on the Q axis, and correct correction cannot be performed. Therefore, it is necessary to align the Q signal on the Q axis, but if the first synthesis circuit is built into an IC, there is a problem that adjustment cannot be performed.
悼）問題点を解決するための手段
本発明は、上述の点に鑑み成されたもので、復調回路と
、該復調回路の出力端に得られる色差信号を用いてＱ信
号を合成する合成回路との間に、印加される色差信号の
大きさを調整する調整手段を挿入したものである。The present invention has been made in view of the above points, and includes a demodulation circuit and a synthesis circuit that synthesizes a Q signal using a color difference signal obtained at the output terminal of the demodulation circuit. An adjusting means for adjusting the magnitude of the applied color difference signal is inserted between the two.
（ホ）作用
本発明によれば、合成回路に印加される２つの色差信号
のレベルを可変抵抗により調整し、Ｑ信号がＱ軸に一致
するようにしているので、ＩＣ（集積回路）のバラツキ
等が存在しても正確な色相補正を行うことができる。(E) Effect According to the present invention, the levels of the two color difference signals applied to the synthesis circuit are adjusted by a variable resistor so that the Q signal coincides with the Q axis. etc., accurate hue correction can be performed.
（へ）実施例
第１図は本発明の一実施例を示す回路図で、Ｑυは一端
が復調回路ｎ′ｌＩの第１出力端子０稀に接続され、可
動端子が第１合成回路０均の第１入力端子０渇に接続さ
れ１こ第１可変抵抗、及び（２→は一端が第１可変抵抗
（２１）の他端に接続され、他端が復調回路０渇の第３
出力端子（ｌ（ト）に接続され、可動端子が第１合成回
路ＯＤの第２入力端子Ｈに接続された第２可変抵抗であ
る。尚、第１図において第３図と同一の回路には、同一
の図番を付し説明を省略する。(F) Embodiment FIG. 1 is a circuit diagram showing an embodiment of the present invention, in which one end of Qυ is connected to the first output terminal 0 of the demodulation circuit n'lI, and the movable terminal is connected to the One end is connected to the other end of the first variable resistor (21), and the other end is connected to the third input terminal of the demodulator circuit (21).
This is a second variable resistor connected to the output terminal (l (g)) and whose movable terminal is connected to the second input terminal H of the first composite circuit OD. are given the same figure numbers and the explanation will be omitted.
第６図に示す如く、復調回路（１湯の第１出力端子ａ漕
にＲ−Ｙ色差信号が、第３出力端子（１５１にＢ −Ｙ
色差信号が発生したとすれば、第１合成回路Ｑ６１の出
力端子にＱ信号が発生する。このＱ信号はＱ軸からＲ−
Ｙ軸方向にずれているため、補正されなければならない
。その場合、第２可変抵抗Ｑ３）の可動端子を最下端に
位置させ、第１可変抵抗（２１）の可動端子を調整すれ
ば、第１合成回路０６）の第１入力端子Ｑ２に減衰され
たＲ−Ｙ色差信号とＢ−Ｙ色差信号の１部が印加される
とともに、第１合成回路αＱの第２入力端子Ｃ２４）に
Ｂ−Ｙ色差信号がそのまま印加されるので、第１合成回
路０６）の出力信号は第６図に示す如くＱとなり、Ｑ軸
に一致する。従って、第１合成回路００の出力信号がＲ
−Ｙ軸方向にずれた場合には、上述の如く第１可変抵抗
（２１）を調整することにより、前記ずれを補正できる
。補正の確認は、正しい肌色に相当するクロマ信号を、
復調回路αつに印加し、増幅器０団の出力端に電圧計を
接続し、その指示が零になるように第１可変抵抗Ｑυを
調整することにより、達成される。As shown in FIG.
If a color difference signal is generated, a Q signal is generated at the output terminal of the first combining circuit Q61. This Q signal is from the Q axis to R-
Since it is shifted in the Y-axis direction, it must be corrected. In that case, by positioning the movable terminal of the second variable resistor Q3) at the lowest end and adjusting the movable terminal of the first variable resistor (21), the attenuated Part of the R-Y color difference signal and the B-Y color difference signal are applied, and the B-Y color difference signal is directly applied to the second input terminal C24) of the first combining circuit αQ, so that the first combining circuit 06 ) output signal becomes Q as shown in FIG. 6, and coincides with the Q axis. Therefore, the output signal of the first combining circuit 00 is R
- If there is a deviation in the Y-axis direction, the deviation can be corrected by adjusting the first variable resistor (21) as described above. To check the correction, check the chroma signal that corresponds to the correct skin tone.
This is achieved by applying the voltage to the demodulation circuit α, connecting a voltmeter to the output terminal of the amplifier group, and adjusting the first variable resistor Qυ so that the reading becomes zero.
一方、第７図に示す如く、復調回路（１２）の第１出力
端子（１３）にＲ−Ｙ色差信号が、第３出力端子０ωに
Ｂ−Ｙ色差信号が発生したとすれば、第１合成回路（１
０の出力端子にＱ信号が発生する。このＱ信号はＱ軸か
らＢ＝Ｙ軸方向にずれているため、補正されなげればな
らない。その場合、第１可変抵抗（２１）の可動端子を
最上端に位置させ、第２可変抵抗（２３）の可動端子を
調整すれば、第１合成回路Ｏｅの第１入力端子（２２１
にＲ−Ｙ色差信号がそのまま印加されるとともに、第２
入力端子Ｃ４）に減衰されたＢ −’ＹＹ色差信号Ｒ−
Ｙ色差信号の１部が印加されるので、第１合成回路Ｏｅ
の出力信号は第７図に示す如く、ＱとなりＱ軸に一致す
る。従って、第１合成回路ＯＱの出力信号がＢ−Ｙ軸方
向にずれた場合には、上述の如く第２可変抵抗０濠を調
整することにより、前記ずれを補正できる。On the other hand, as shown in FIG. 7, if the R-Y color difference signal is generated at the first output terminal (13) of the demodulation circuit (12) and the B-Y color difference signal is generated at the third output terminal 0ω, then the first Synthesis circuit (1
A Q signal is generated at the output terminal of 0. Since this Q signal deviates from the Q axis in the B=Y axis direction, it must be corrected. In that case, by positioning the movable terminal of the first variable resistor (21) at the uppermost end and adjusting the movable terminal of the second variable resistor (23), the first input terminal (221
The R-Y color difference signal is applied as is, and the second
Attenuated B-'YY color difference signal R- to input terminal C4)
Since a part of the Y color difference signal is applied, the first synthesis circuit Oe
As shown in FIG. 7, the output signal becomes Q and coincides with the Q axis. Therefore, if the output signal of the first combining circuit OQ deviates in the BY-axis direction, the deviation can be corrected by adjusting the second variable resistor 0 as described above.
第２図は本発明の他の実施例を示すもので、第１可変抵
抗（２１）の一端を、復調回路（１２の第１出力端子Ｈ
に接続し、他端を接地するとともに、第２可変抵抗（ハ
）の一端を復調回路Ｑ功の第３出力端子０９に接続し、
他端を接地したものである。FIG. 2 shows another embodiment of the present invention, in which one end of the first variable resistor (21) is connected to the first output terminal H of the demodulation circuit (12).
and the other end is grounded, and one end of the second variable resistor (c) is connected to the third output terminal 09 of the demodulator circuit Q.
The other end is grounded.
第８図に示す如（、復調回路（＋２１の第１出力端子（
１濁にＲ−Ｙ色差信号が、第３出力端子０■にＢ−Ｙ色
差信号がそれぞれ発生したとすれば、第１合成回路Ｑｆ
９の出力端子にＱ信号が発生する。このＱ信号はＱ軸か
らＲ−Ｙ軸方向にずれているため、補正されなければな
らない。その場合、第１可変抵抗Ｈの可動端子を調整し
、第２可変抵抗（２（資）の可鉤端子を最上端に位置さ
せると、第１合成回路０ｅの第１入力端子（ハ）に減衰
されたＲ−Ｙ色差信号が印加されるとともに、第１合成
回路（１６）の第２入力端子Ｃｉ’４）にＢ−Ｙ色差信
号がそのまま印加されるので、第１合成回路（１６）の
出力信号は、第８図に示す如くＱとなりＱ軸に一致する
。従って、第１合成回路ＯＱの出力信号がＲ−Ｙ軸方向
にずれた場合には、上述の如く第１可変抵抗（２υを調
整することにより前記ずれを補正できる。As shown in FIG. 8, the demodulation circuit (+21 first output terminal (
If an R-Y color difference signal is generated at the first output terminal and a B-Y color difference signal is generated at the third output terminal 0, the first synthesis circuit Qf
A Q signal is generated at the output terminal of 9. Since this Q signal deviates from the Q axis in the RY axis direction, it must be corrected. In that case, by adjusting the movable terminal of the first variable resistor H and positioning the hook terminal of the second variable resistor (2) at the top end, the first input terminal (C) of the first composite circuit 0e Since the attenuated R-Y color difference signal is applied and the B-Y color difference signal is directly applied to the second input terminal Ci'4) of the first combining circuit (16), the first combining circuit (16) The output signal becomes Q as shown in FIG. 8 and coincides with the Q axis. Therefore, if the output signal of the first synthesis circuit OQ deviates in the RY axis direction, the deviation can be corrected by adjusting the first variable resistor (2υ) as described above.
一方、第９図に示す如く、復調回路側の第１出力端子０
：１にＲ−Ｙ色差信号が、第３出力端子（１つにＢ−Ｙ
色差信号が発生したとすれば、第１合成回路ＯＱの出力
端子にＱ信号が発生する。このＱ信号はＱ軸からＢ−Ｙ
軸方向にずれているため、補正されなければならない。On the other hand, as shown in FIG. 9, the first output terminal 0 on the demodulation circuit side
:1 has the R-Y color difference signal, and the third output terminal (one has the B-Y color difference signal
If a color difference signal is generated, a Q signal is generated at the output terminal of the first combining circuit OQ. This Q signal is from the Q axis to B-Y
It is axially misaligned and must be corrected.
その場合、第１可変抵抗（２Ｉ）の可動端子を最上端に
位置させ、第２可変抵抗（２渇の可動端子を調整すれば
、第１合成回路（１６）の第１入力端子（２２１に、Ｒ
−Ｙ色差信号がそのまま印加されるとともに、第１合成
回路（１６）の第２入力端子０１４１に、減衰されたＢ
−Ｙ色差信号が印加されるので、第１合成回路ＱＢ）の
出力信号は、第９図に示す如くＱとなりＱ軸に一致する
。従って、第１合成回路の出力信号がＢ−Ｙ軸方向にず
れた場合には、上述の如く第２可変抵抗Ｃ（を調整する
ことにより、前記ずれを補正できる。In that case, by positioning the movable terminal of the first variable resistor (2I) at the top end and adjusting the movable terminal of the second variable resistor (2I), the first input terminal (221) of the first combining circuit (16) ,R
-Y color difference signal is applied as is, and the attenuated B color difference signal is applied to the second input terminal 0141 of the first synthesis circuit (16).
Since the -Y color difference signal is applied, the output signal of the first synthesis circuit QB) becomes Q as shown in FIG. 9 and coincides with the Q axis. Therefore, if the output signal of the first synthesis circuit deviates in the BY-axis direction, the deviation can be corrected by adjusting the second variable resistor C (as described above).
（ト）発明の効果
それ故、本発明によれば、２つの可変抵抗の調整により
第１合成回路の出力信号を調整でき、前記出力信号を正
しくＱ軸に一致させることが可能になる。又、従来のＩ
Ｃに外付けの可変抵抗を接続するだけで、色差信号のレ
ベルを調整して第１合成回路の出力信号をＱ軸に一致さ
せているので、ＩＣのピン数を増加させること無（、前
記調整を行い得る。(g) Effects of the Invention Therefore, according to the present invention, the output signal of the first combining circuit can be adjusted by adjusting the two variable resistors, and the output signal can be correctly aligned with the Q axis. Also, the conventional I
By simply connecting an external variable resistor to C, the level of the color difference signal is adjusted to match the output signal of the first synthesis circuit with the Q axis, so there is no need to increase the number of pins on the IC (see above). Adjustments can be made.
第１図は本発明の一実施例を示す回路図、第２図は本発
明の他の実施例を示す回路図、第３図は従来の色相自動
補正装置を示す回路図、第４図及び第５図は第３図の動
作を説明する為のベクトル図、第６図、第７図、第８図
及び第９図は本発明の説明に供する為のベクトル図であ
る。
主な図番の説明
（９）・・・色相調整回路、 ０２・・・復調回路、
（１（Ｄ・・・第１合成回路、 （２Ｉ）・・・第１可
変抵抗、 ■３）・・・第２可変抵抗。
出願人 三洋電機株式会社 外１名
代理人 弁理士 佐 野 静 夫
Ｒ−Ｙ軸
第５図
第６図
−Ｙ
第９ し：
ＲＹ軸
α！−
Ｂ−Ｙ！ｍFIG. 1 is a circuit diagram showing one embodiment of the present invention, FIG. 2 is a circuit diagram showing another embodiment of the present invention, FIG. 3 is a circuit diagram showing a conventional hue automatic correction device, and FIGS. FIG. 5 is a vector diagram for explaining the operation of FIG. 3, and FIGS. 6, 7, 8, and 9 are vector diagrams for explaining the present invention. Explanation of main drawing numbers (9)...hue adjustment circuit, 02...demodulation circuit,
(1(D...first composite circuit, (2I)...first variable resistor, ■3)...second variable resistor. Applicant Sanyo Electric Co., Ltd. and one other representative Patent attorney Shizuka Sano Husband: RY axis α!- B-Y!m
Claims (1)
を合成する合成回路を有し、該合成回路の出力信号に応
じて色相調整回路を自動調整するようにした色相自動補
正装置において、前記合成回路に印加される色差信号の
大きさを調整する調整手段を、前記復調回路と合成回路
との間に、挿入したことを特徴とする色相自動補正装置
。An automatic hue correction device having a synthesis circuit for synthesizing a Q signal using a color difference signal obtained at an output end of a demodulation circuit, and automatically adjusting a hue adjustment circuit according to the output signal of the synthesis circuit, An automatic hue correction device characterized in that an adjustment means for adjusting the magnitude of the color difference signal applied to the synthesis circuit is inserted between the demodulation circuit and the synthesis circuit.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60176551A JPS6236994A (en) | 1985-08-10 | 1985-08-10 | Device for automatically correcting hue |
| US06/835,844 US4695875A (en) | 1985-03-14 | 1986-03-03 | Automatic hue correction circuit |
| KR8601796A KR930002123B1 (en) | 1985-03-14 | 1986-03-13 | Automatic hue correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60176551A JPS6236994A (en) | 1985-08-10 | 1985-08-10 | Device for automatically correcting hue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6236994A true JPS6236994A (en) | 1987-02-17 |
| JPH0435109B2 JPH0435109B2 (en) | 1992-06-10 |
Family
ID=16015560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60176551A Granted JPS6236994A (en) | 1985-03-14 | 1985-08-10 | Device for automatically correcting hue |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6236994A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55154891A (en) * | 1979-05-22 | 1980-12-02 | Victor Co Of Japan Ltd | Automatic hue correcting circuit |
-
1985
- 1985-08-10 JP JP60176551A patent/JPS6236994A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55154891A (en) * | 1979-05-22 | 1980-12-02 | Victor Co Of Japan Ltd | Automatic hue correcting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0435109B2 (en) | 1992-06-10 |
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