KR20000033617A - Method for high quality picture realization through gamma revision for pdp television - Google Patents
Method for high quality picture realization through gamma revision for pdp television Download PDFInfo
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- KR20000033617A KR20000033617A KR1019980050561A KR19980050561A KR20000033617A KR 20000033617 A KR20000033617 A KR 20000033617A KR 1019980050561 A KR1019980050561 A KR 1019980050561A KR 19980050561 A KR19980050561 A KR 19980050561A KR 20000033617 A KR20000033617 A KR 20000033617A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/202—Gamma control
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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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/2803—Display of gradations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/66—Transforming electric information into light information
- H04N5/70—Circuit details for electroluminescent devices
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
Abstract
Description
본 발명은 PDP텔레비전에서 감마보정을 통한 화질구현방법에 관한 것으로서, 검출된 APL에 따라 RGB화소데이타에 감마보정을 하여 명암대비가 효율적으로 이루어져 양질의 화상을 구현할 수 있는 PDP텔레비전에서 감마보정을 통한 화질구현방법(A picture realization method through gamma revision for PDP television)에 관한 것이다.The present invention relates to a method for realizing image quality through gamma correction in PDP television, and to gamma correction on RGB pixel data according to the detected APL, so that contrast can be efficiently achieved and gamma correction is performed in PDP television that can realize high quality images. A picture realization method through gamma revision for PDP television.
일반적으로, PDP텔레비전에서는 CRT와 같은 감마보정, 즉 영상신호의 레벨이 선형적으로 증가하는 경우, 시청자가 느끼는 밝기가 선형적인 증가분만큼 실질적으로 이루어지지 않기 때문에, 레벨이 높은 부분을 인위적으로 낮추는 감마보정이 행해지고 있다.In general, in PDP televisions, gamma correction such as CRT, that is, when the level of a video signal increases linearly, a gamma that artificially lowers a high level part because the brightness felt by the viewer is not substantially achieved by a linear increase. Correction is being performed.
그러나, PDP텔레비전에서 상기 CRT의 경우처럼 한 가지의 감마보정을 행하는 경우에는 PDP의 특성상 CRT에서와 같은 효과가 발생하지 않는 문제점이 있다.However, when one gamma correction is performed in the PDP television as in the case of the CRT, there is a problem in that the same effect as in the CRT does not occur due to the characteristics of the PDP.
본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 본 발명의 목적은 입력되는 복합영상신호에서 APL을 검출한 후, 상기 APL이 속하는 범위에 따라 각기 다른 감마보정이 실행되도록 함으로써, 명암의 효율적인 대비가 이루어져 양질의 화상이 구현되도록 하는 PDP텔레비전에서 감마보정을 통한 화질구현방법을 제공하는 데 있다.The present invention has been invented to solve the above problems, and an object of the present invention is to detect an APL from an input composite video signal, and then perform different gamma correction depending on the range of the APL. The present invention provides a method of realizing image quality through gamma correction in PDP televisions, in which high-quality images are realized by efficient contrast.
상기의 목적을 달성하기 위한 기술적 사상으로서 입력되는 복합영상신호가 디지털 화소데이타로 변환되는 신호변환과정과, 상기 복합영상신호에서 APL이 검출되는 검출과정과, 상기 검출과정을 통해 검출된 APL의 범위가 판별되는 판별과정과, 상기 판별과정에서 판별된 APL의 범위에 따라 변환된 화소데이타의 감마보정이 실행되는 감마보정과정을 포함하는 발명이 제시된다.As a technical idea for achieving the above object, a signal conversion process of converting an input composite video signal into digital pixel data, a detection process of detecting APL in the composite video signal, and a range of APL detected through the detection process A gamma correction process of performing a gamma correction of pixel data converted according to a range of APL determined in the determination process is performed.
도 1은 본 발명의 실시예에 따른 PDP텔레비전에서 감마보정을 통한 화질구현방법을 설명하기 위한 블록도.1 is a block diagram illustrating a method for implementing image quality through gamma correction in a PDP television according to an exemplary embodiment of the present invention.
도 2는 본 발명의 실시예에 따른 PDP텔레비전에서 감마보정을 통한 화질구현방법을 나타낸 흐름도.2 is a flowchart illustrating a method of implementing image quality through gamma correction in a PDP television according to an exemplary embodiment of the present invention.
도 3은 본 발명의 실시예에 따른 감마보정된 상태를 나타낸 도면.3 is a diagram illustrating a gamma corrected state according to an exemplary embodiment of the present invention.
＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>
100 : A/D변환부 110: 프레임 메모리100: A / D converter 110: frame memory
120 : 신호처리부 130 : 감마보정부120: signal processing unit 130: gamma correction
140 : 메모리 제어부 150 : 동기분리부140: memory controller 150: synchronization separator
160 : 타이밍 펄스발생기 170 : APL검출부160: timing pulse generator 170: APL detector
180 : 마이컴 190 : 화소데이타 펄스발생부180: microcomputer 190: pixel data pulse generator
200 : 유지·주사펄스발생부 210 : 플라즈마 디스플레이 패널200: holding and scanning pulse generator 210: plasma display panel
S100 : 영상신호 입력과정 S150 : APL검출과정S100: Video signal input process S150: APL detection process
S200 : APL값 판별과정 S250 : 제 1APL과정S200: APL value determination process S250: 1APL process
S300 : 제 1감마보정과정 S350 : 제 2APL과정S300: first gamma correction process S350: second APL process
S400 : 제 2감마보정과정 S450 : 제 3APL과정S400: second gamma correction process S450: third APL process
S500 : 제 3감마보정과정 S550 : 출력과정S500: third gamma correction process S550: output process
이하, 첨부된 도면을 참고로 하면서 본 발명의 목적을 달성하기 위한 구체적인 실시예에 대하여 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described a specific embodiment for achieving the object of the present invention.
첨부된 도 1은 본 발명의 실시예에 따른 PDP텔레비전에서 감마보정을 통한 화질구현방법을 설명하기 위한 블록도이다.1 is a block diagram illustrating a method of implementing image quality through gamma correction in a PDP television according to an exemplary embodiment of the present invention.
도 1을 참조하여 설명하면, 입력되는 복합영상신호를 디지털 변환하는 A/D변환부(100)과, 상기 A/D변환부(100)에서 출력되는 변환된 신호를 저장하는 프레임 메모리(110)과, 상기 복합영상신호에서 동기신호를 분리하는 동기분리부(150)과, 상기 동기분리부(150)에서 분리된 수평동기신호 및 수직동기신호를 근거로 하여 다양한 타이밍 펄스를 발생하는 타이밍 펄스발생기(160)과,Referring to FIG. 1, an A / D converter 100 for digitally converting an input composite video signal and a frame memory 110 for storing the converted signal output from the A / D converter 100 are described. And a timing pulse generator for generating various timing pulses based on the horizontal synchronization signal and the vertical synchronization signal separated by the synchronization separator 150 for separating the synchronization signal from the composite video signal. 160,
상기 프레임 메모리(110)에 타이밍 펄스로 동기된 기입 및 리드펄스를 출력함과 더불어, 후술하는 신호처리부(120)에 화소 데이터를 출력하는 메모리 제어부(140)과, 상기 타이밍 펄스발생기(160)의 타이밍 펄스에 동기되어 화소 데이터를 출력하는 신호처리부(120)과, 상기 신호처리부(120)에서 화소 데이터를 입력받아 감마보정하는 감마보정부(130)과,The memory controller 140 which outputs write and read pulses synchronized with timing pulses to the frame memory 110 and outputs pixel data to the signal processor 120 to be described later, and the timing pulse generator 160 A signal processor 120 for outputting pixel data in synchronization with a timing pulse, a gamma correction unit 130 for receiving gamma correction from the pixel data from the signal processor 120,
상기 감마보정부(130)에서 감마보정된 화소데이타를 인가받은 후, 후술하는 플라즈마 디스플레이 패널(210)의 열 전극에 화소데이타펄스를 발생하여 인가하는 화소데이타 펄스발생부(190)과, 열(column) 전극 D1, D2 … Dm-1, Dm과 행(row) 전극 X1, Y1, X2 … Xn, Yn으로 구성되는 플라즈마 디스플레이 패널(210)과,After receiving the gamma-corrected pixel data from the gamma correction unit 130, the pixel data pulse generator 190 and column (not shown) generating and applying pixel data pulses to the column electrodes of the plasma display panel 210 will be described later. column) electrodes D1, D2... Dm −1 , Dm and row electrodes X1, Y1, X2. A plasma display panel 210 composed of Xn and Yn,
상기 플라즈마 디스플레이 패널(210)의 행 전극과 열 전극에 유지 및 주사펄스를 인가하는 유지·주사 펄스발생부(200)과, 상기 입력된 복합영상신호에서 APL(average picture level;평균휘도레벨)을 검출하는 APL검출부(170)과, 상기 APL검출부(170)에서 검출된 APL데이타를 인가받아 상기 감마보정부(130)에 제어신호를 인가하는 마이컴(180)으로 이루어진다.A sustain / scan pulse generator 200 for applying sustain and scan pulses to the row and column electrodes of the plasma display panel 210 and an average picture level (APL) of the input composite image signal. The APL detection unit 170 to detect and the microcomputer 180 to apply the control signal to the gamma correction unit 130 receives the APL data detected by the APL detection unit 170.
여기서, 상기 행 전극의 각각은 한 쌍의 X, Y전극으로 이루어진다.Here, each of the row electrodes consists of a pair of X and Y electrodes.
이하, 상기 플라즈마 디스플레이 패널(210)의 구동에 대해 설명하면 다음과 같다.Hereinafter, the driving of the plasma display panel 210 will be described.
상기 유지·주사 펄스발생부(200)은 타이밍 펄스발생기(160)의 타이밍 펄스에 응답하여 방전이 시작되도록 하기 위해 전위를 갖는 주사펄스를 행 전극 X1 … Xn에 인가하게 된다.The sustain / scan pulse generator 200 applies a scan pulse having a potential to start discharge in response to a timing pulse of the timing pulse generator 160. Is applied to Xn.
더불어, 상기 유지·주사 펄스발생부(200)은 타이밍 펄스발생기(160)의 타이밍 펄스에 응답하여 방전상태가 유지되도록 하기 위해 전위를 갖는 유지펄스를 생성한 후, 행 전극 Y1 … Yn과 X1 … Xn에 인가하게 된다.In addition, the sustain / scan pulse generator 200 generates a sustain pulse having a potential to maintain the discharge state in response to the timing pulse of the timing pulse generator 160, and then generates the row electrodes Y1... Yn and X1... Is applied to Xn.
또한, 상기 화소데이타 펄스발생부(190)은 감마보정된 각 화소데이타에 대응하는 화소데이타펄스를 생성하여, 열 전극D1 … Dm에 인가하게 된다.In addition, the pixel data pulse generator 190 generates pixel data pulses corresponding to gamma-corrected pixel data, and generates the column electrodes D1... Applied to Dm.
이어, 첨부된 도 2는 본 발명의 실시예에 따른 PDP텔레비전에서 감마보정을 통한 화질구현방법을 나타낸 흐름도이다.Subsequently, FIG. 2 is a flowchart illustrating a method of implementing image quality through gamma correction in a PDP television according to an exemplary embodiment of the present invention.
첨부된 도 3은 본 발명의 실시예에 따른 감마보정된 상태를 나타낸 도면이다.3 is a diagram illustrating a gamma-corrected state according to an embodiment of the present invention.
우선, 도 2를 참조하여 설명하면, 텔레비전에 전원이 공급되어 일정 채널의 영상신호가 입력되는 영상신호 입력과정(S100)과,First, referring to FIG. 2, a video signal input process (S100) in which power is supplied to a television to input a video signal of a predetermined channel;
상기 영상신호 입력과정(S100)에서 입력된 영상신호 중에서 APL을 검출하는 APL검출과정(S150)과,An APL detection process S150 for detecting an APL from the video signal input in the video signal input process S100;
상기 APL검출과정(S150)에서 검출된 APL값을 판별하는 APL값 판별과정(S200)과,An APL value determination process (S200) for determining an APL value detected in the APL detection process (S150);
상기 APL값 판별과정(S200)에서 판별된 APL값이 30%이하인 것으로 판별되는 제 1APL과정(S250)과,A first APL process (S250), in which the APL value determined in the APL value determination process (S200) is 30% or less, and
상기 제 1APL과정(S250)에서 판별된 APL값에 따른 감마보정이 이루어지는 제 1감마보정과정(S300)과,A first gamma correction process (S300) in which a gamma correction is performed according to the APL value determined in the first APL process (S250),
상기 APL값 판별과정(S200)에서 판별된 APL값이 30% - 70%인 것으로 판별되는 제 2APL과정(S350)과,A second APL process (S350), in which the APL value determined in the APL value determination process (S200) is 30% to 70%, and
상기 제 2APL과정(S350)에서 판별된 APL값에 따른 감마보정이 이루어지는 제 2감마보정과정(S400)과,A second gamma correction process (S400) in which a gamma correction is performed according to the APL value determined in the second APL process (S350),
상기 APL값 판별과정(S200)에서 판별된 APL값이 70%이상인 것으로 판별되는 제 3APL과정(S450)과,A third APL process (S450) in which it is determined that the APL value determined in the APL value determination process (S200) is 70% or more;
상기 제 3APL과정(S450)에서 판별된 APL값에 따른 감마보정이 이루어지는 제 3감마보정과정(S500)과,A third gamma correction process (S500) in which a gamma correction is performed according to the APL value determined in the third APL process (S450),
상기 3단계의 감마보정(S300, S400, S500)에서 감마보정된 신호의 출력이 실행되는 출력과정(S550)과,An output process (S550) in which the output of the gamma-corrected signal is executed in the gamma correction (S300, S400, S500) of the three steps;
상기 APL값 판별과정(S200)에서 정상적인 APL값의 판별이 이루어지지 않는 경우, APL을 반복하여 검출하는 과정으로 이루어진다.If the normal APL value is not determined in the APL value determination process (S200), the APL is repeatedly detected.
이하, 첨부된 도 1, 도 2 및 도 3을 참조하여 본 발명의 실시예에 따른 방법을 설명한다.Hereinafter, a method according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3.
우선, 텔레비전내로 입력되는 복합영상신호는 타이밍 펄스발생기(160)에서 공급되는 타이밍 펄스에 동기되어 동작하는 A/D변환부(100)에 의해 예를들면, 8비트의 화소데이타로 디지털 변환된다.First, the composite video signal input into the television is digitally converted into, for example, 8-bit pixel data by the A / D converter 100 operating in synchronization with the timing pulse supplied from the timing pulse generator 160.
또한, 상기 타이밍 펄스발생기(160)의 타이밍 펄스에 동기되어 기입 및 리드펄스를 출력하는 상기 메모리 제어부(140)은 상기 A/D변환부(100)에 의해 변환된 화소데이타를 리드(read)하여 프레임 메모리(110)에 저장되도록 함과 더불어, 리드한 화소데이터를 신호처리부(120)에 출력하게 된다.In addition, the memory controller 140 outputting write and read pulses in synchronization with the timing pulse of the timing pulse generator 160 may read the pixel data converted by the A / D converter 100. In addition to being stored in the frame memory 110, the read pixel data is output to the signal processor 120.
여기서, 상기 APL검출부(170)은 입력되는 복합영상신호에서 평균휘도레벨인 APL을 검출하여 마이컴(180)에 출력하게 되고, 상기 마이컴(180)은 입력된 APL값이 어느 범위에 속하는지 판별하게 된다.Here, the APL detector 170 detects APL, which is an average luminance level, from the input composite video signal, and outputs the APL to the microcomputer 180. The microcomputer 180 determines whether the input APL value falls within a range. do.
즉, 상기 APL값이 30%이하, 30 - 70%, 70%이상의 범위 중 어느 범위에 속하는지 판별하여 상기 APL값이 30%이하인 경우에는 제 1감마보정 제어신호를, 상기 APL값이 30 - 70%인 경우에는 제 2감마보정 제어신호를, 상기 APL값이 70%이상인 경우에는 제 3감마보정 제어신호를 각각 상기 감마보정부(130)에 인가하게 된다.That is, it is determined whether the APL value is within 30%, 30-70%, and 70% or more of the range. When the APL value is 30% or less, a first gamma correction control signal is generated, and the APL value is 30-. In the case of 70%, the second gamma correction control signal is applied to the gamma correction unit 130, respectively, when the APL value is 70% or more.
상기 마이컴(180)의 제 1감마보정 제어신호를 인가받은 감마보정부(130)은 첨부된 도 3a에 도시된 바와 같이, 신호처리부(120)에서 입력되는 화소데이타에 감마보정계수를 변경시켜, 신호의 레벨이 큰 부분(밟은 부분;가) 및 낮은 부분은 더 증가되도록 함과 더불어, 신호의 크기가 중간정도인 부분(나)은 감소되도록 함으로써, 명암의 대비를 크게 한다.The gamma correction unit 130 receiving the first gamma correction control signal of the microcomputer 180 changes the gamma correction coefficient to the pixel data input from the signal processor 120, as shown in FIG. The portion where the level of the signal is large (stepped) and the lower portion is increased further, and the portion where the signal is medium (me) is reduced, thereby increasing the contrast.
또한, 상기 마이컴(180)의 제 2감마보정 제어신호를 인가받은 감마보정부(130)은 첨부된 도 3b에 도시된 바와 같이, 신호처리부(120)에서 입력되는 화소데이타에 감마보정계수를 변경시켜, 선형(linear)적인 감마보정이 이루어지도록 한다.In addition, the gamma correction unit 130 receiving the second gamma correction control signal of the microcomputer 180 changes the gamma correction coefficient to the pixel data input from the signal processor 120 as shown in FIG. 3B. This allows linear gamma correction.
상기 마이컴(180)의 제 3감마보정 제어신호를 인가받은 감마보정부(130)은 첨부된 도 3c에 도시된 바와 같이, 신호처리부(120)에서 입력되는 화소데이타에 감마보정계수를 변경시켜, 신호 레벨이 높은 부분(다)을 일정정도 낮추는 감마보정이 실행되도록 한다.As shown in FIG. 3C, the gamma correction unit 130 receiving the third gamma correction control signal of the microcomputer 180 changes the gamma correction coefficient to the pixel data input from the signal processor 120. Gamma correction is performed to lower a portion (C) of a high signal level to some extent.
따라서, 상기의 각 경우에 따른 감마보정이 실행된 화소데이타를 인가받은 화소데이타 펄스발생부(190)은 각 경우에 대응하는 화소데이타 펄스를 생성하여 열 전극D1 … Dm에 인가함으로써, 상기 플라즈마 디스플레이 패널(210) 상에 신호의 밝기에 따라 효율적으로 명암의 대비가 구현된 화상이 디스플레이되도록 한다.Therefore, the pixel data pulse generator 190, which receives the gamma correction pixel data according to each of the above cases, generates pixel data pulses corresponding to each case to generate the column electrodes D1... By applying to Dm, the image on which the contrast is realized is efficiently displayed on the plasma display panel 210 according to the brightness of the signal.
본 발명은 상기한 실시예에 한정되지 않고, 발명의 기술적 사상을 벗어나지 않는 범위에서 다양한 변형이 가능하다.The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention.
즉, 상기한 실시예에서는 검출된 APL의 범위를 3가지로 구분하여 적용한 경우에 대해 설명하였지만, 이에 한정되지 않고 더욱 세분하여 감마보정이 이루어지도록 할 수도 있다.That is, in the above-described embodiment, a case in which the detected APL is divided into three types is described. However, the present invention is not limited thereto, and gamma correction may be performed in more detail.
이상에서 설명한 바와 같이 본 발명은 효율적인 명암의 대비가 이루어진 화상구현을 위해 입력되는 복합영상신호가 디지털 화소데이타로 변환되는 신호변환과정, 상기 복합영상신호에서 APL이 검출되는 검출과정, 상기 검출과정을 통해 검출된 APL의 범위가 판별되는 판별과정, 상기 판별과정에서 판별된 APL의 범위에 따라 변환된 화소데이타의 감마보정이 실행되는 감마보정과정을 포함하는 방법을 제공하여, 상기 APL이 속하는 범위에 따라 각기 다른 감마보정이 실행되도록 함으로써, 명암의 대비를 효율적으로 할 수 있고, 그에 따라 양질의 화상이 구현되는 효과가 있다.As described above, the present invention provides a signal conversion process of converting an input composite video signal into digital pixel data for an effective image contrast, detecting the APL in the composite video signal, and detecting the detection process. And a gamma correction process of performing gamma correction of the pixel data converted according to the range of the APL determined in the determination process. Accordingly, by allowing different gamma corrections to be performed, contrast of the contrast can be efficiently performed, whereby an image of good quality can be realized.
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| KR1019980050561A KR20000033617A (en) | 1998-11-25 | 1998-11-25 | Method for high quality picture realization through gamma revision for pdp television |
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| KR1019980050561A KR20000033617A (en) | 1998-11-25 | 1998-11-25 | Method for high quality picture realization through gamma revision for pdp television |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070043258A (en) * | 2005-10-20 | 2007-04-25 | 삼성전자주식회사 | Display apparatus and control method thereof |
| US7265795B2 (en) | 2003-04-18 | 2007-09-04 | Hitachi, Ltd. | Video signal processing circuit, video display apparatus, and video display method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7265795B2 (en) | 2003-04-18 | 2007-09-04 | Hitachi, Ltd. | Video signal processing circuit, video display apparatus, and video display method |
| KR100759279B1 (en) * | 2003-04-18 | 2007-09-17 | 가부시키가이샤 히타치세이사쿠쇼 | Video signal processing circuit, video display apparatus, and video display method |
| KR20070043258A (en) * | 2005-10-20 | 2007-04-25 | 삼성전자주식회사 | Display apparatus and control method thereof |
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