KR910005930Y1 - Brightness control circuit - Google Patents

Brightness control circuit Download PDF

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Publication number
KR910005930Y1
KR910005930Y1 KR2019880009672U KR880009672U KR910005930Y1 KR 910005930 Y1 KR910005930 Y1 KR 910005930Y1 KR 2019880009672 U KR2019880009672 U KR 2019880009672U KR 880009672 U KR880009672 U KR 880009672U KR 910005930 Y1 KR910005930 Y1 KR 910005930Y1
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South Korea
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brightness
screen
level
transistor
unit
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KR2019880009672U
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Korean (ko)
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KR900002017U (en
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조동호
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삼성전자 주식회사
안시환
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

내용 없음.No content.

Description

온 스크린 문자의 밝기 조절회로On-Screen Character Brightness Control Circuit

본 고안의 일실시 회로도.One embodiment circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

5 : 밝기조절부 10 : 밝기레벨 인식부5: brightness control unit 10: brightness level recognition unit

15 : 온스크린 레벨조정부 20 : 온스크린 적색 드라이브부15: On Screen Level Adjuster 20: On Screen Red Drive

25 : 메인 CRT 적색 드라이브부 Q1~Q4: 트랜지스터25: main CRT red drive unit Q 1 to Q 4 : transistor

R1~R12: 저항 VR1, VR2, VR3: 가변저항R 1 to R 12 : resistance VR 1 , VR 2 , VR 3 : variable resistor

본 고안은 온 스크린 디스플레이(On Screen Display)기능을 적용한 텔레비젼등에서 화면에 밝기변화에 따라서 자동적으로 온 스크린 문자의 밝기도 조절되도록 한 온 스크린 문자의 밝기조절회로에 관한 것이다.The present invention relates to a brightness control circuit of an on-screen character to automatically adjust the brightness of the on-screen character in accordance with the change in the brightness of the screen, such as on-screen display (On Screen Display).

일반적으로 온 스크린 디스플레이 기능(텔레비젼 화면에 시청중인 채널, 볼륨의 크기, 시간등의 문자를 디스플레이하는 기능)을 가진 텔레비젼에 있어서, 밝기(Bright)가변시 즉 텔레비젼 화면의 밝기 조정을 행하여도 온 스크린 문자의 밝기는 전혀 변화가 없었다.In general, in a television having an on-screen display function (a function of displaying characters such as a channel being watched on a television screen, a volume size, and a time of day), the on-screen display is performed even when the brightness is changed, that is, the brightness of the television screen is adjusted. The brightness of the letters did not change at all.

따라서 화면이 어두울경우 온 스크린 문자의 밝기가 너무 밝아 화면시청시 눈에 거슬리게 되어 사용자의 화면 시청시 많은 불편함을 주는 것이었다.Therefore, when the screen is dark, the brightness of the on-screen character is too bright, it becomes annoying when viewing the screen, which gives a lot of inconvenience when viewing the screen.

본 고안은 이와같은 점을 감안하여 텔레비젼 화면을 조절하면 이에 비례하여 온 스크린 문자 밝기도 가변될 수 있도록 한 것으로써, 밝기조절부의 밝기레벨을 밝기 레벨 인식부에서 인식하고 온 스크린 레벨 조정부에서 온 스크린 레벨을 조정시킨 후 온 스크린 문자 입력레벨을 제어해 주어 화면의 밝기변화에 따라 온 스크린 문자의 밝기도 변화도록 한 것이다.The present invention allows the on-screen character brightness to be changed in proportion to the adjustment of the TV screen in consideration of such a point, so that the brightness level of the brightness control unit is recognized by the brightness level recognition unit and the on-screen level control unit is on. After adjusting the level, the on-screen character input level is controlled so that the brightness of the on-screen character changes as the brightness of the screen changes.

이를 첨부도면에 의하여 상세히 설명하면 다음과 같다.When described in detail by the accompanying drawings as follows.

밝기 조절용 가변저항(VR1)과 서브밝기 조절용 가변저항(VR2)으로 구성된 밝기 조절부(5)에서 영상처리 집적소자(IC)의 밝기단자(B)전위를 가변시켜주어 화면의 밝기를 조정하는 밝기조정회로에 있어서, 밝기조절부(5)에서 조절된 밝기레벨이 제너다이오드(D1)를 통하여 트랜지스터(Q1)의 베이스에 인가되게 밝기 레벨 인식부(10)를 구성하여 밝기레벨의 전위를 검출하게하고 트랜지스터(Q1)를 통하여 흐르는 전원(VDD)을 바이어스용 저항(R5)(R6)이 연결된 트랜지스터(Q2) 베이스에 인가되어 트랜지스터(Q2)의 구동을 제어하므로써 저항(R7)(R8)으로 온스크린 적색 드라이브부(20)의 출력전위를 제어하게 온스크린 레벨조정부(15)를 구성한다.The brightness control unit 5, which includes a variable resistor VR 1 for adjusting brightness and a variable resistor VR 2 for adjusting sub-brightness, adjusts the brightness terminal B of the image processing integrated device IC to adjust the brightness of the screen. In the brightness adjusting circuit, the brightness level recognition unit 10 is configured such that the brightness level adjusted by the brightness adjusting unit 5 is applied to the base of the transistor Q 1 through the zener diode D 1 . A potential is detected and a power supply V DD flowing through the transistor Q 1 is applied to the base of the transistor Q 2 to which the bias resistors R 5 and R 6 are connected to control the driving of the transistor Q 2 . Therefore, the on-screen level adjusting unit 15 is configured to control the output potential of the on-screen red drive unit 20 by the resistors R 7 and R 8 .

그리고 메인 CRT 적색드라이브 회로(25)의 적색 출력은 CRT 캐소드에 인가됨과 동시에 트랜지스터(Q3)와 저항(R9)(R10)및 다이오드(D3)로 구성된 온 스크린 적색 드라이부(20)를 통하여 온스크린 문자로 인가되게 구성한다.In addition, the red output of the main CRT red drive circuit 25 is applied to the CRT cathode and at the same time the on-screen red dry unit 20 composed of a transistor Q 3 , a resistor R 9 (R 10 ), and a diode D 3 . Configured to be applied as an on-screen character through.

이때 메인 CRT 적색 드라이브부(25)와 동일하게 녹색과 청색드라이브를 구성한다.At this time, the green and blue drives are configured similarly to the main CRT red drive unit 25.

즉 본 고안은 밝기조절부(5)에서 밝기레벨을 조절하면 이를 밝기레벨인식부(10)에서 인식하여 온스크린 레벨조정부(15)를 구동시킴으로써 온스크린 레벨조정부(15)의 출력으로 온스크린 적색드라이부(20)의 출력전위를 제어해 주어 화면의 밝기조정과 함께 온스크린 문자의 밝기도 조정되게 구성한 것이다.In other words, when the brightness level is adjusted by the brightness controller 5, the present invention recognizes the brightness level by the brightness level recognizer 10 and drives the on-screen level adjuster 15 to output the on-screen red as the output of the on-screen level adjuster 15. By controlling the output potential of the driving unit 20 is configured to adjust the brightness of the on-screen characters along with the brightness of the screen.

이와같이 구성된 본 고안에서 텔레비젼을 시청시 화면의 밝기를 가변시킬때에는 밝기 조절용 가변저항(VR1)과 서브밝기조절용 가변저항(VR2)을 조정해줌에 따라 영상처리 집적소자(IC)의 밝기단자(B)에 인가되는 밝기레벨이 변하게 된다.In the present invention configured as described above, the brightness terminal of the image processing integrated device (IC) is adjusted by adjusting the variable resistance VR 1 and the sub brightness control variable VR 2 when the brightness of the screen is changed when watching TV. The brightness level applied to B) is changed.

만약 가변저항(VR1)(VR2)을 가변시켜 밝기레벨이 떨어지게되어 화면이 어둡게 되면 즉 영상처리 집적소자(IC)에 인가되는 밝기레벨이 가변저항(VR1)(VR2)을 가변시킴에 따라 떨어지게되어 제너다이오드(D1)의 설정전압이하로 떨어지게되면 제너다이오드(D1)가 연결된 트랜지스터(Q1)가 "턴온"하게 되므로써 트랜지스터(Q1)의 콜렉터에 인가되는 전원(VDD)이 다이오드(D2)를 통하여 전압 분할 바이어스용 저항(R5)(R6)이 연결된 트랜지스터(Q2)의 베이스에 인가되게 된다. 즉 가변저항(VR1)(VR2)으로 밝기조정레벨을 떨어뜨리면 화면이 어둡게 됨과 동시에 밝기 레벨이 제너다이오드(D1)의 제너전압이하가 되어 트랜지스터(Q1)를 "턴온"시킴으로써 전원(VDD)이 다이오드(D2)를 통하여 저항(R5)(R6)이 연결된 트랜지스터(Q2)의 베이스에 인가되게 된다.If the variable resistance VR 1 (VR 2 ) is changed to decrease the brightness level and the screen becomes dark, that is, the brightness level applied to the image processing integrated device IC changes the variable resistance VR 1 (VR 2 ). It is dropped in accordance with when the drops below the set voltage of the Zener diode (D 1) the zener diode (D 1) is connected to the transistor (Q 1) is applied to the collector of doemeurosseo transistor (Q 1) to "turn-on" power supply (V DD ) Is applied to the base of the transistor Q 2 to which the resistor R 5 (R 6 ) for voltage division bias is connected via the diode D 2 . In other words, if the brightness adjustment level is decreased by the variable resistors VR 1 and VR 2 , the screen becomes dark and the brightness level becomes less than the zener voltage of the zener diode D 1 , thereby turning on the transistor Q 1 to turn on the power supply ( V DD ) is applied to the base of transistor Q 2 to which resistor R 5 (R 6 ) is connected via diode D 2 .

따라서 트랜지스터(Q2)가 "턴온"되게 되어 저항(R7)(R8)에 의하여 트랜지스터(Q3)의 베이스 전위를 떨어뜨려 주므로써 트랜지스터(Q3)의 에미터측에 출력되는 온스크린 적색문자레벨을 떨어뜨리게되어 화면에 표시되는 온스크린 문자레벨을 어둡게하여 준다.Therefore, the transistor (Q 2) is to be "turned on" resistance (R 7) (R 8) in the by-screen output to the emitter teocheuk of the transistor (Q 3) drop the base potential state meurosseo transistor (Q 3) of the red Drops the character level, which darkens the on-screen character level displayed on the screen.

이때 밝기 조절용 가변저항(VR1)(VR2)의 가변에 따라 자동으로 변동되는 온스크린 밝기상태가 사용자의 요구에 부응치 못할때에는 저항(R7)을 가변볼륨으로 해주어 자동으로 변동된 온스크린 문자밝기 레벨을 다시 조절할수 있게된다.At this time, when the on-screen brightness that is automatically changed according to the variable of the brightness control variable resistor (VR 1 ) (VR 2 ) does not meet the user's request, the resistance (R 7 ) is changed to a variable volume and the on-screen automatically changed. The text brightness level can be adjusted again.

그러나 가변저항(VR1)(VR2)의 가변시켜 영상처리 집적소자(IC)의 밝기단자(B)에 인가되는 밝기레벨이 제너다이오드(D1)의 설정 전압이상이 되면 상기와 반대의 작용으로 동작하여 온스크린 적색문자레벨을 높여주므로써 온스크린 문자를 밝게 하여 준다.However, if the brightness level applied to the brightness terminal B of the image processing integrated device IC by varying the variable resistors VR 1 and VR 2 is greater than or equal to the set voltage of the zener diode D 1 , the opposite effect to the above is applied. To increase the on-screen red character level and make the on-screen character brighter.

그리고 본 고안에서 메인 CRT 적색 드라이브부(25)만 도시하였으나 청색이나 녹색드라이브도 동일하게 구성되어 있으며 메인 CRT 적색 드라이부(25)는 트랜지스터(Q4)의 베이스에 색차신호(R-Y)를 입력시키고 트랜지스터(Q4)의 에미터에는 휘도신호 (-Y)가 가변저항(VR3)과 저항(R12) 및 콘덴서(C1)를 통하여 인가되게 하므로써, 트랜지스터(Q4)의 콜렉터측으로는 적색신호만 뽑아내어 CRT 캐소드 입력시키게 된다.In the present invention, only the main CRT red drive unit 25 is illustrated, but the blue or green drive is configured in the same way, and the main CRT red dry unit 25 inputs the color difference signal RY to the base of the transistor Q 4 . The luminance signal (-Y) is applied to the emitter of the transistor Q 4 through the variable resistor VR 3 , the resistor R 12 , and the capacitor C 1 so that the collector side of the transistor Q 4 is red. Only the signal is extracted and input into the CRT cathode.

이때 가변저항(VR3)은 적색신호의 밝기조정을 행하여 주게된다.At this time, the variable resistor VR 3 adjusts the brightness of the red signal.

이상에서와 같이 본 고안은 밝기조절용 가변저항(VR1)(VR2)을 가변시켜 변화된 밝기레벨로 화면의 밝기를 조정해주면 이때의 밝기레벨은 밝기레벨인식부(10)와 온스크린 레벨조정부(15)를 통하여 트랜지스터(Q3)의 베이스에 인가되므로 트랜지스터(Q3)의 베이스바이어스가 가변저항(VR1)(VR2)에 의하여 변하는 밝기레벨과 비례적으로 변하게 되므로써 출력되는 온스크린 문자의 밝기를 변화시킬수 있는 것이다.As described above, the present invention adjusts the brightness of the screen to the changed brightness level by varying the variable resistance (VR 1 ) (VR 2 ) for brightness, and the brightness level at this time is the brightness level recognition unit 10 and the on-screen level adjustment unit ( 15) a through transistor (Q 3), the on-screen characters that is the base bias of the so applied to the base transistor (Q 3) output variable resistor (VR 1) (VR 2) changes to change the brightness level and the proportion by doemeurosseo of You can change the brightness.

따라서 화면의 밝기변화에 비례하여 온스크린 문자 밝기도 변하게 되므로 화면을 시청할때 화면 밝기에 비하여 온스크린 문자 밝기가 너무 밝아 시청시 불편을 느끼게 되는 단점을 없앨수 있는 것이다.Therefore, the on-screen character brightness is also changed in proportion to the brightness of the screen, so that the on-screen character brightness is too bright compared to the screen brightness when viewing the screen to eliminate the disadvantage of the inconvenience.

Claims (1)

온스크린 기능을 갖춘 텔레비젼의 밝기조절회로에 있어서, 밝기조절부(5)에서 조절된 밝기레벨을 제너다이오드(D1)와 트랜지스터(Q1)로 인식하여 검출하는 밝기레벨부(10)와 , 상기 밝기레벨부(10)의 출력으로 트랜지스터(Q2)를 구동시켜 온스크린 레벨을 조정하는 온스크린 레벨조정부(15)와, 상기 온스크린 레벨조정부(15)의 출력으로 온스크린 문자밝기를 제어하게 구성시킨 온스크린 문자의 밝기의 조절회로.In the brightness control circuit of a television having an on-screen function, the brightness level unit 10 for detecting and detecting the brightness level adjusted by the brightness control unit 5 with the Zener diode (D 1 ) and the transistor (Q 1 ), On-screen level adjuster 15 for adjusting the on-screen level by driving transistor Q 2 to the output of the brightness level unit 10, and on-screen character brightness is controlled by the output of the on-screen level adjuster 15 Brightness control circuit for on-screen characters.
KR2019880009672U 1988-06-21 1988-06-21 Brightness control circuit KR910005930Y1 (en)

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KR910005930Y1 true KR910005930Y1 (en) 1991-08-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020069429A (en) * 2001-02-26 2002-09-04 주식회사 옵티라이더 Portable canopy which can unfolding function
KR100408071B1 (en) * 2001-07-13 2003-12-03 연안알루미늄 주식회사 Tent pole
KR100418243B1 (en) * 2001-09-26 2004-02-11 허태경 Sunshade frame for a chair

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442856B1 (en) * 1997-10-31 2005-01-17 삼성전자주식회사 Video amplifier having osd with embedded intensity function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020069429A (en) * 2001-02-26 2002-09-04 주식회사 옵티라이더 Portable canopy which can unfolding function
KR100408071B1 (en) * 2001-07-13 2003-12-03 연안알루미늄 주식회사 Tent pole
KR100418243B1 (en) * 2001-09-26 2004-02-11 허태경 Sunshade frame for a chair

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