KR20000032073A - Device for calibrating equality of brightness of screen in image display device - Google Patents

Device for calibrating equality of brightness of screen in image display device Download PDF

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Publication number
KR20000032073A
KR20000032073A KR1019980048414A KR19980048414A KR20000032073A KR 20000032073 A KR20000032073 A KR 20000032073A KR 1019980048414 A KR1019980048414 A KR 1019980048414A KR 19980048414 A KR19980048414 A KR 19980048414A KR 20000032073 A KR20000032073 A KR 20000032073A
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South Korea
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brightness
control
control signal
signal
output
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KR1019980048414A
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Korean (ko)
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이경준
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구자홍
엘지전자 주식회사
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Priority to KR1019980048414A priority Critical patent/KR20000032073A/en
Publication of KR20000032073A publication Critical patent/KR20000032073A/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/002—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast

Abstract

PURPOSE: A calibrator is provided to equalize the whole brightness of a screen by calibrating the event that the brightness of a central part gets darker compared to an edge of the screen after varying the width of vibration of a vertical/horizontal parabola signal input to a direct current control amplification unit. CONSTITUTION: When a beam current generated in a high voltage generation unit(11) is fed to a B/U control signal generation unit(12), an ABL(Auto Beam Limit) control unit(12-1) within the B/U control signal generation unit prevents the excessiveness of the beam current generated in the high voltage generation unit. Herein, When the beam current of which excessiveness is prevented is output and is fed to an amplification unit(12-2) within the B/U control signal generation unit, the amplification unit receives a brightness control signal and amplifies and outputs it to a voltage for driving a direct current amplification unit. When B/U control signal is input in the direct current control amplification unit, the direct current control amplification unit varies and outputs the width of vibration of the input vertical/horizontal parabola signal based on the variation of the brightness signal of the input B/U control signal. Then the brightness control unit(15) regulates the amount of an electronic beam emitted from a cathode and equally calibrates the whole screen brightness of a braan tube after calibrating the brightness of a central part.

Description

영상표시기기의 화면 밝기의 균일성 보정장치Uniformity Correction Device of Screen Brightness of Video Display Equipment

본 발명은 높낮이가 변화된 휘도신호가 출력될 때 입력된 수평/수직 파라볼라신호의 진폭을 가변시켜 화면의 가장자리에 비하여 중앙부의 밝기가 어두워지는 상태를 보정하여 화면의 밝기를 균일화하도록 한 영상표시기기의 화면 밝기의 균일성 보정장치에 관한 것이다.According to an embodiment of the present invention, an amplitude of a horizontal / vertical parabola signal input when a luminance signal having a varying height is output is corrected so that a brightness of a central portion becomes darker than an edge of a screen so as to equalize the brightness of the screen. It relates to a uniformity correction device of the screen brightness.

종래 영상표시기기의 화면 밝기의 보정장치는 도 1에 도시된 바와 같이, 고압의 빔전류를 출력하는 고압발생부(1)와, 빔전류의 과도함을 방지하기 위해 고압발생부(1)에서 출력되는 ABL(Auto Beam Limit)신호를 입력받아 휘도신호가 출력되도록 제어하는 제어신호발생부(2)와, 상기 제어신호발생부(2)에서 출력된 휘도신호의 변화에 관계없이 수평/수직 파라볼라신호를 입력받아 이를 증폭출력하는 직류제어증폭부(3)와, 상기 직류제어증폭부(3)에서 증폭출력된 수평/수직 파라볼라신호를 입력받아 화면의 가장자리에 비하여 중앙부의 밝기상태에 따라 휘도를 조절하므로서 화면의 전체 밝기를 균일화하도록 제어하는 콘트라스트/밝기 제어부(4)로 구성된 것이다.As shown in FIG. 1, a device for compensating screen brightness of a conventional image display apparatus includes a high voltage generator 1 for outputting a high voltage beam current, and a high voltage generator 1 to prevent excessive beam current. A control signal generator 2 for receiving the output ABL (Auto Beam Limit) signal and controlling the luminance signal to be output, and a horizontal / vertical parabola regardless of the change in the luminance signal output from the control signal generator 2. The DC control amplifier 3 receives the signal and amplifies and outputs the signal, and the horizontal / vertical parabola signal amplified by the DC control amplifier 3 receives the luminance according to the brightness of the center of the screen. Contrast / brightness control unit (4) for controlling to uniformize the overall brightness of the screen by adjusting.

이와 같이 구성된 종래 영상표시기기의 화면 밝기의 보정장치는 도 1에 도시된 바와 같이, 영상표시기기의 화면에 디스플레이 되는 영상을 시청하고자 할 경우 고압발생부(1)에서 빔전류와 상기 빔전류의 과도함을 방지하기 위해 ABL신호가 출력되면 제어신호발생부(2)는 고압발생부(1)에서 출력된 신호에 따라 휘도신호를 출력하게 된다.As shown in FIG. 1, a device for compensating screen brightness of a conventional video display device configured as described above is used in the high voltage generator 1 to view an image displayed on a screen of the video display device. When the ABL signal is output to prevent excessiveness, the control signal generator 2 outputs a luminance signal according to the signal output from the high voltage generator 1.

이때, 제어신호발생부(2)에서 휘도신호가 출력시 직류제어증폭부(3)는 제어신호발생부(2)에서 출력되는 휘도신호의 변화에 상관없이 수평/수직 파라볼라신호를 입력받아 이를 증폭하여 콘트라스트/밝기 제어부(4)에 인가하므로서, 상기 콘트라스트/밝기 제어부(4)는 제어신호발생부(2)에서 출력된 수평/수직 파라볼라신호에 의해 화면의 가장자리에 비하여 중앙부의 밝기 상태에 따라 휘도를 조절하므로서 화면 전체의 밝기를 균일하게 보정하게 된다.At this time, when the luminance signal is output from the control signal generator 2, the DC control amplifier 3 receives and amplifies the horizontal / vertical parabola signal regardless of the change in the luminance signal output from the control signal generator 2; By applying to the contrast / brightness control unit 4, the contrast / brightness control unit 4 has a luminance according to the brightness of the center portion compared to the edge of the screen by the horizontal / vertical parabola signal output from the control signal generator 2 By adjusting, the brightness of the entire screen is uniformly corrected.

그러나, 종래에는 직류제어증폭부(3)에서 출력되는 휘도신호의 변화에 상관없이 콘트라스트/밝기 제어부(4)에서 화면 밝기를 균일하게 보정하게 되어, 휘도신호가 낮을 때 또는 도스(DOS)상태에서는 화면의 가장자리에 비하여 중앙부의 밝기가 어둡게 보이는 문제점이 있었다.However, conventionally, the screen brightness is uniformly corrected by the contrast / brightness control unit 4 regardless of the change in the luminance signal output from the DC control amplifier 3, so that the luminance signal is low or in the DOS state. There was a problem that the brightness of the center portion is darker than the edge of the screen.

본 발명은 이와 같은 종래의 문제점을 해결하기 위하여 입력된 휘도신호의 높낮이가 변화될 때 직류제어증폭부에 입력되는 수평/수직 파라볼라신호의 진폭을 가변시켜 화면의 가장자리에 비하여 중앙부의 밝기가 어두워지는 현상을 보정하므로서 화면의 전체 밝기를 균일하게 하도록 한 것으로 첨부된 도면에 의하여 본 발명의 구성 및 작용효과를 설명하면 다음과 같다.In order to solve the conventional problem, the present invention changes the amplitude of the horizontal / vertical parabola signal input to the DC control amplifier when the height of the input luminance signal is changed so that the brightness of the center portion becomes darker than the edge of the screen. The configuration and operation effects of the present invention will be described with reference to the accompanying drawings in order to make the overall brightness of the screen uniform by correcting the phenomenon.

도 1은 종래 영상표시기기의 화면 밝기의 보정장치구조를 보인 블록도.1 is a block diagram showing a structure of a device for compensating screen brightness of a conventional video display device.

도 2는 본 발명 영상표시기기의 화면 밝기의 균일성 보정장치의 구조를 보인 블럭도.Figure 2 is a block diagram showing the structure of the screen uniformity correction device of the image display apparatus of the present invention.

먼저, 본 발명 영상표시기기의 화면 밝기의 균일성 보정장치는 도 2에 도시되 바와 같이, 빔전류가 출력되는 고압발생부(11)와, 상기 고압발생부(11)에서 출력되는 빔전류의 과도함을 방지하고 외부의 조작에 의해 입력된 휘도제어신호를 증폭출력하여 화면 밝기의 균일화를 위한 B/U제어신호를 출력하는 B/U(Brightness Uniformity)제어신호 발생부(12)와, 상기 외부의 아날로그가변저항 및 키이 등의 조작으로 B/U제어신호발생부(12)에 휘도신호를 출력하는 휘도제어부(13)와, 상기 B/U제어신호발생부(12)에서 출력되는 휘도신호에 연동하는 B/U제어신호를 입력받아 입력된 수평/수직 파라볼라신호의 진폭을 가변하여 출력하는 직류제어증폭부(14)와, 상기 직류제어증폭부(14)에서 가변출력된 수평/수직 파라볼라신호를 입력받아 캐소우드에서 방출되는 전자빔의 양을 조절하여 브라운관(16)의 화면 밝기를 조절하는 밝기제어부(15)로 구성된 것으로,First, as shown in FIG. 2, the apparatus for correcting the uniformity of screen brightness of the image display device of the present invention includes a high voltage generator 11 for outputting a beam current and a beam current output from the high voltage generator 11. A B / U (Brightness Uniformity) control signal generator 12 for preventing a transient and outputting a B / U control signal for uniformizing screen brightness by amplifying and outputting a luminance control signal inputted by an external operation; A luminance control unit 13 for outputting a luminance signal to the B / U control signal generation unit 12 by manipulation of an external analog variable resistor and a key, and the luminance signal output from the B / U control signal generation unit 12. A DC control amplifier 14 for receiving a B / U control signal interlocked with and varying the amplitude of the input horizontal / vertical parabola signal, and a horizontal / vertical parabola variable output from the DC control amplifier 14; The amount of electron beam emitted from the cathode That the section consisting of the brightness control section 15 to control the screen brightness of the CRT 16,

상기 B/U제어신호발생부(12)는 고압발생부(11)에서 출력된 빔전류의 과도함을 방지하기 위한 ABL(Auto Beam Limit)제어부(12-1)와 상기 ABL(Auto Beam Limit)제어부(12-1)와 휘도제어부(13)에 의해 출력된 휘도제어신호를 직류제어증폭부(14)가 구동하도록 증폭출력하는 증폭부(12-2)로 구성된 것으로, R1,R2는 저항, D1은 다이오드이다.The B / U control signal generation unit 12 is an ABL (Auto Beam Limit) control unit 12-1 and the ABL (Auto Beam Limit) to prevent excessive beam current output from the high voltage generation unit 11 And amplification part 12-2 for amplifying and outputting the luminance control signal output by the control part 12-1 and the brightness control part 13 to drive the DC control amplifier 14, wherein R1 and R2 are resistors, D1 is a diode.

이와 같이 구성된 본 발명의 작용효과는 도 2에 도시된 바와 같이, 고압발생부(11)에서 발생한 빔전류가 B/U제어신호 발생부(12)에 인가되면, 상기 B/U제어신호 발생부(12)내의 ABL제어부(12-1)는 고압발생부(11)에서 발생한 빔전류의 과도함을 방지하게 된다.As illustrated in FIG. 2, when the beam current generated by the high voltage generator 11 is applied to the B / U control signal generator 12, the B / U control signal generator The ABL control unit 12-1 in (12) prevents excessive beam current generated in the high voltage generator 11.

이때, ABL제어부(12-1)에 의해 과도함이 방지된 빔전류가 출력되어 B/U제어신호 발생부(12)내의 증폭부(12-2)에 인가되면 상기 증폭부(12-2)는 외부의 아날로그 가변저항 또는 키이 등의 조작으로 휘도제어부(13)에서 발생한 휘도제어신호를 입력받아 직류제어증폭부(14)를 구동시키기 위한 전압으로 증폭출력하게된다.At this time, when the beam current prevented from being excessive by the ABL control unit 12-1 is applied to the amplifying unit 12-2 in the B / U control signal generator 12, the amplifying unit 12-2. The amplifier outputs a luminance control signal generated by the luminance control unit 13 by an external analog variable resistor or a key to a voltage for driving the DC control amplifier 14.

이와 같이, B/U제어신호발생부(12)에서 출력된 B/U제어신호가 직류제어증폭부(14)에 입력되면 상기 직류제어증폭부(14)는 입력된 B/U제어신호에 의해 휘도신호의 가변에 따라 입력된 수평/수직 파라볼라신호의 진폭을 가변출력하게 되므로서, 밝기제어부(15)는 직류제어증폭부(14)에서 가변출력된 수평/수직 파라볼라신호에 의해 캐소우드로부터 방출되는 전자빔의 양을 조절하여 브라운관(16)의 화면 가장자리에 비하여 어둡게 보이는 중앙부의 밝기를 보정하여 브라운관(16)의 전체 화면 밝기를 균일하게 보정하게 된다.As described above, when the B / U control signal output from the B / U control signal generator 12 is input to the DC control amplifier 14, the DC control amplifier 14 is driven by the input B / U control signal. Since the amplitude of the horizontal / vertical parabola signal input in accordance with the change of the luminance signal is variably output, the brightness controller 15 emits from the cathode by the horizontal / vertical parabola signal variablely output from the DC control amplifier 14. By adjusting the amount of electron beam to be corrected to the brightness of the central portion that appears darker than the screen edge of the CRT 16 to uniformly correct the overall screen brightness of the CRT 16.

즉, 외부의 아날로그 가변저항 또는 키이 등의 조작에 의해 휘도제어부(13)에서 발생한 휘도제어신호가 B/U제어신호발생부(12)에 인가될 때 직류제어증폭부(14)는 휘도신호의 변화에 따라 B/U제어신호발생부(12)에서 출력된 B/U제어신호에 의해 입력된 수평/수직 파라볼라신호의 진폭을 조절하게 되는 바, 상기 휘도가 낮을 경우 직류제어증폭부(14)는 입력된 수평/수직 파라볼라신호의 진폭을 낮추고, 휘도가 높을 경우 직류제어증폭부(14)에 입력된 수평/수직 파라볼라신호의 진폭을 높게하므로서, 브라운관(16)의 화면 전체 밝기를 균일하게 보정하게 된다.That is, when the luminance control signal generated by the luminance control unit 13 is applied to the B / U control signal generation unit 12 by an external analog variable resistor or key operation, the DC control amplifier unit 14 generates the luminance signal. According to the change, the amplitude of the horizontal / vertical parabola signal inputted by the B / U control signal output from the B / U control signal generator 12 is adjusted. When the luminance is low, the DC control amplifier 14 Lowers the amplitude of the input horizontal / vertical parabola signal, and increases the amplitude of the horizontal / vertical parabola signal input to the DC control amplifier 14 when the luminance is high, thereby uniformly correcting the entire screen brightness of the CRT 16. Done.

이상에서 설명한 바와 같이, 직류제어증폭부에 수평/수직파라볼라신호가 입력될 때 B/U제어신호발생부에서 가변출력되는 휘도신호에 연동하여 상기 수평/수직파라볼라신호의 진폭을 조절하므로서 브라운관의 화면 가장자리에 비하여 중앙부의 밝기를 어둡게 하므로서 화면 전체의 밝기를 균일화 할 수 있는 효과가 있다.As described above, when the horizontal / vertical parabola signal is input to the DC control amplifier, the screen of the CRT is controlled by controlling the amplitude of the horizontal / vertical parabola signal in conjunction with the luminance signal that is variably output from the B / U control signal generator. The brightness of the center is darker than the edges, and the brightness of the entire screen is equalized.

Claims (2)

빔전류가 출력되는 고압발생부와, 외부의 아날로그가변저항 및 키이 등의 조작에 의해 휘도신호를 출력하는 휘도제어부와, 고압발생부에서 출력된 빔전류와 휘도제어부에서 출력된 휘도신호를 입력받아 상기 휘도신호에 연동하는 B/U제어신호를 출력하는 B/U제어신호 발생부와, 상기 B/U제어신호 발생부에서 출력되는 휘도에 연동하는 B/U제어신호를 입력받아 입력된 수평/수직파라볼라신호의 진폭을 가변출력하는 직류제어증폭부와, 상기 직류제어증폭부에서 가변출력된 수평/수직 파라볼라신호를 입력받아 캐소우드에서 방출되는 전자빔의 양을 조절하여 브라운관의 화면 밝기를 조절하는 밝기제어부로 구성된 영상표시기기의 화면 밝기의 균일성 보정장치.A high voltage generator for outputting a beam current, a brightness controller for outputting a luminance signal by an external analog variable resistor and a key, and a beam current output from the high voltage generator and a brightness signal output from the controller A B / U control signal generator for outputting a B / U control signal interworking with the luminance signal and a B / U control signal interoperating with the luminance output from the B / U control signal generator A DC control amplifier for varying the amplitude of the vertical parabola signal and a horizontal / vertical parabola signal that is variably output from the DC control amplifier to control the amount of electron beam emitted from the cathode to adjust the screen brightness of the CRT. Uniformity correction device of the screen brightness of the image display device composed of the brightness control unit. 제 1항에 있어서, B/U제어신호 발생부는 고압발생부에서 출력된 빔전류의 과도함을 방지하기 위한 ABL제어부와, 상기 ABL제어부에서 출력된 제어신호와 휘도제어부에서 출력된 휘도제어신호를 입력받아 직류제어증폭부가 구동하도록 증폭출력하는 증폭부로 이루어진 것을 특징으로 하는 영상표시기기의 화면 밝기의 균일성 보정장치.The B / U control signal generation unit according to claim 1, wherein the B / U control signal generation unit includes an ABL control unit for preventing excessive beam current output from the high voltage generation unit, a control signal output from the ABL control unit and a luminance control signal output from the luminance control unit. The uniformity correction device of the screen brightness of the video display device, characterized in that consisting of an amplification unit for receiving and amplifying output to drive the DC control amplifier.
KR1019980048414A 1998-11-12 1998-11-12 Device for calibrating equality of brightness of screen in image display device KR20000032073A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100618975B1 (en) * 1999-09-03 2006-09-01 삼성전자주식회사 Apparatus for compensating the shading of displayer and method therefor
CN106300928A (en) * 2016-10-19 2017-01-04 山东鲁能智能技术有限公司 A kind of digitized parabola current controller and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100618975B1 (en) * 1999-09-03 2006-09-01 삼성전자주식회사 Apparatus for compensating the shading of displayer and method therefor
CN106300928A (en) * 2016-10-19 2017-01-04 山东鲁能智能技术有限公司 A kind of digitized parabola current controller and control method thereof

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