KR100264460B1 - Lcd display system - Google Patents

Lcd display system Download PDF

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Publication number
KR100264460B1
KR100264460B1 KR1019980003200A KR19980003200A KR100264460B1 KR 100264460 B1 KR100264460 B1 KR 100264460B1 KR 1019980003200 A KR1019980003200 A KR 1019980003200A KR 19980003200 A KR19980003200 A KR 19980003200A KR 100264460 B1 KR100264460 B1 KR 100264460B1
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South Korea
Prior art keywords
signal
liquid crystal
multiplexer
image
crystal panels
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KR1019980003200A
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Korean (ko)
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KR19990069141A (en
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장광수
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구자홍
엘지전자주식회사
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Publication of KR19990069141A publication Critical patent/KR19990069141A/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
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE: A liquid crystal display system is provided to switch a multiplexer with response to a field detect signal of the first image source to share a signal processor and a driver. CONSTITUTION: The liquid crystal display system includes the first multiplexer(MUX,320), the signal processor(330), the first and second liquid crystal panel(341,342), a driver, and the second and third multiplexers(362). The first multiplexer receives image signal from the different first and second image sources and outputs one image source with response to the field detect signal from the first image source selectively. The signal processor receives the output image signal from the multiplexer and performs signal processing. The first and second liquid crystal panel display the image signal. The driver outputs a driving signal to the first and second liquid crystal panels based on the processed result of the signal processor. The second and third multiplexers receives a Y start pulse from the driver based on the field detect signal(ID) of the first image source and outputs an operation control signal of the first and second liquid crystal panels. The second and third multiplexers outputs signals which are symmetrical to each other so as to operate only one of the first and second liquid crystal panels.

Description

액정 표시 시스템Liquid crystal display system

본 발명은 액정 표시 시스템에 관한 것으로서 특히, 하나의 구동회로를 이용하여 2개의 서로 다른 영상신호를 2개의 액정패널에 동시에 디스플레이할 수 있도록 하는 액정 표시 시스템에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display system, and more particularly, to a liquid crystal display system capable of simultaneously displaying two different image signals on two liquid crystal panels using one driving circuit.

도 1은 종래 기술에 의하여 2개의 영상 소스(source)를 2개의 액정 패널에 디스플레이 하기 위한 액정 표시 시스템의 구성을 나타내는 블록도이다.1 is a block diagram showing a configuration of a liquid crystal display system for displaying two image sources on two liquid crystal panels according to the prior art.

도 1을 참조하면, 서로 다른 제1,2 영상소스(111,112)로부터 개별적으로 입력받아 신호를 처리하는 제1,2 신호처리부(121,122)와, 영상신호를 디스플레이하기 위한 제1,2 액정패널(131,132)과, 상기 제1,2 신호처리부(121,122)의 처리 결과에 따라 상기 제1,2 액정패널(131,132)로 구동신호를 출력시키는 제1,2 구동부(141,142)를 포함하여 구성된다.Referring to FIG. 1, first and second signal processing units 121 and 122 for separately receiving signals from different first and second image sources 111 and 112, and first and second liquid crystal panels for displaying an image signal 131 and 132 and first and second drivers 141 and 142 which output driving signals to the first and second liquid crystal panels 131 and 132 according to the processing results of the first and second signal processors 121 and 122.

그러나, 상기와 같은 구성은 2개의 신호처리부(121,122) 및 구동부(141,142)를 포함하기 때문에 실효성이 없게 된다.However, the above configuration is ineffective because it includes two signal processing units 121 and 122 and driving units 141 and 142.

한편, 신호처리부 및 구동부를 공유하기 위한 종래 기술의 구성이 도 2에 도시되어 있다.On the other hand, the configuration of the prior art for sharing the signal processing unit and the driving unit is shown in FIG.

도 2를 참조하면, 서로 다른 제1,2 영상소스(211,212)로부터 동시에 입력받아 선택적으로 어느 하나의 영상소스를 출력시키는 제1 멀티플렉서(MUX)(220)와, 상기 제1 멀티플렉서(220)에서 출력되는 영상신호를 입력받아 신호를 처리하는 신호처리부(230)와, 영상신호를 디스플레이하기 위한 제1,2 액정패널(241,242)과, 상기 신호처리부(230)의 처리 결과에 따라 구동신호를 출력시키는 구동부(250)와, 상기 구동부(250)에서 출력되는 구동신호를 입력받아 상기 제1,2 액정패널(241,242)로 구동신호를 출력시키는 제2 멀티플렉서(260)와, 상기 제1 멀티플렉서(220) 및 제2 멀티플렉서(260)의 동작을 제어하는 마이컴(270)을 포함하여 구성된다.Referring to FIG. 2, a first multiplexer (MUX) 220 that simultaneously receives input from different first and second image sources 211 and 212 and selectively outputs one image source, and the first multiplexer 220 A signal processor 230 for processing a signal by receiving an output video signal, first and second liquid crystal panels 241 and 242 for displaying a video signal, and outputting a driving signal according to a processing result of the signal processor 230 A second multiplexer 260 that receives the driving unit 250, a driving signal output from the driving unit 250, and outputs a driving signal to the first and second liquid crystal panels 241 and 242, and the first multiplexer 220. And the microcomputer 270 for controlling the operation of the second multiplexer 260.

그러나, 상기와 같은 구성은 신호처리부 및 구동부의 공용화는 가능하나, 액정패널로 연결되는 구동 신호선이 20여개가 되어 상기 제2 멀티플렉서가 신호선의 개수에 맞는 스위칭 수단이 필요하게 되기 때문에 멀티플렉서 회로의 구성에 어려움이 발생하여 그 실효성이 없게 된다.However, the above-described configuration allows the signal processing unit and the driving unit to be used in common, but since there are about 20 driving signal lines connected to the liquid crystal panel, the second multiplexer requires switching means suitable for the number of signal lines. Difficulties arose and its effectiveness is lost.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 그 목적은 구비되는 멀티플렉서를 제1 영상소스의 필드 판별신호(ID)에 따라 스위칭 시킴으로써 간단한 구성으로 신호처리부 및 구동부가 공유되는 액정 표시 시스템을 제공하는데 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to switch a multiplexer provided according to a field discrimination signal ID of a first image source to share a signal processor and a driver in a simple configuration. To provide.

도 1은 종래 기술의 제1 실시예에 의한 구성을 나타내는 블록도,1 is a block diagram showing a configuration according to a first embodiment of the prior art;

도 2는 종래 기술의 제2 실시예에 의한 구성을 나타내는 블록도,2 is a block diagram showing a configuration according to a second embodiment of the prior art;

도 3은 본 발명에 의한 구성을 나타내는 블록도,3 is a block diagram showing a configuration according to the present invention;

도 4는 본 발명의 동작 파형도.4 is an operational waveform diagram of the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

311,312 : 제1,2 영상소스 320 : 제1 멀티플렉서(MUX)311,312: First and second video sources 320: First multiplexer (MUX)

330 : 신호처리부 341,342 : 제1,2 액정패널330: signal processor 341,342: first and second liquid crystal panel

350 : 구동부 361,362 : 제2,3 멀티플렉서350: driver 361,362: second and third multiplexers

상기와 같은 목적을 달성하기 위한 본 발명의 특징에 따르면, 서로 다른 제1,2 영상소스로부터 영상신호를 동시에 입력받아 상기 제1 영상소스의 필드 판별신호(ID)에 따라 선택적으로 어느 하나의 영상소스를 출력시키는 제1 멀티플렉서(MUX)와, 상기 제1 멀티플렉서에서 출력되는 영상신호를 입력받아 신호를 처리하는 신호처리부와, 영상신호를 디스플레이하기 위한 제1,2 액정패널과, 상기 신호처리부의 처리 결과에 따라 상기 제1,2 액정패널로 구동신호를 출력시키는 구동부와, 상기 제1 영상소스의 필드 판별신호(ID)에 따라 상기 구동부에서 출력되는 Y 스타트 펄스(start pulse)를 입력받아 상기 제1,2 액정패널의 동작 제어신호를 출력시키는 제2,3 멀티플렉서를 포함하는 액정 표시 시스템을 제공한다.According to a feature of the present invention for achieving the above object, by receiving a video signal from different first and second video sources at the same time, optionally one of the video according to the field discrimination signal (ID) of the first video source A first multiplexer (MUX) for outputting a source, a signal processor for processing a signal by receiving an image signal output from the first multiplexer, first and second liquid crystal panels for displaying an image signal, and the signal processor A driving unit for outputting a driving signal to the first and second liquid crystal panels according to a processing result, and receiving a Y start pulse output from the driving unit according to the field discrimination signal ID of the first image source; The present invention provides a liquid crystal display system including second and third multiplexers for outputting operation control signals of the first and second liquid crystal panels.

이때, 본 발명의 부가적인 특징에 따르면, 상기 제2,3 멀티플렉서는 서로 반대의 신호를 출력하여 상기 제1,2 액정패널 중 어느 하나 만이 동작하도록 한다.In this case, according to an additional feature of the present invention, the second and third multiplexers output signals opposite to each other so that only one of the first and second liquid crystal panels operates.

이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

도 3은 본 발명에 의한 액정 표시 시스템의 구성을 나타내는 블록도이다.3 is a block diagram showing the configuration of a liquid crystal display system according to the present invention.

도 3을 참조하면, 서로 다른 제1,2 영상소스(311,212)로부터 영상신호를 동시에 입력받아 상기 제1 영상소스(311)의 필드 판별신호(ID)에 따라 선택적으로 어느 하나의 영상소스를 출력시키는 제1 멀티플렉서(MUX)(320)와, 상기 제1 멀티플렉서(320)에서 출력되는 영상신호를 입력받아 신호를 처리하는 신호처리부(330)와, 영상신호를 디스플레이하기 위한 제1,2 액정패널(341,342)과, 상기 신호처리부(330)의 처리 결과에 따라 상기 제1,2 액정패널(341,342)로 구동신호를 출력시키는 구동부(350)와, 상기 제1 영상소스(311)의 필드 판별신호(ID)에 따라 상기 구동부(350)에서 출력되는 Y 스타트 펄스(start pulse)를 입력받아 상기 제1,2 액정패널(241,242)의 동작 제어신호를 출력시키는 제2,3 멀티플렉서(361,362)를 포함하여 구성된다.Referring to FIG. 3, an image signal may be simultaneously input from different first and second image sources 311 and 212, and one or more image sources may be selectively output according to the field discrimination signal ID of the first image source 311. A first multiplexer (MUX) 320, a signal processor 330 for receiving a video signal output from the first multiplexer 320 and processing a signal, and a first and second liquid crystal panel for displaying a video signal. 341 and 342, a driver 350 outputting a driving signal to the first and second liquid crystal panels 341 and 342 according to the processing result of the signal processor 330, and a field discrimination signal of the first image source 311. And second and third multiplexers 361 and 362 receiving Y start pulses output from the driver 350 according to ID, and outputting operation control signals of the first and second liquid crystal panels 241 and 242. It is configured by.

이때, 상기 제2,3 멀티플렉서(361,362)는 서로 반대의 신호를 출력하여 상기 제1,2 액정패널(241,242) 중 어느 하나 만이 동작하도록 한다.In this case, the second and third multiplexers 361 and 362 output opposite signals to each other so that only one of the first and second liquid crystal panels 241 and 242 operates.

상기와 같이 구성된 본 발명의 동작을 참부한 도 4의 파형도를 참조하여 설명하면 다음과 같다.Referring to the waveform diagram of Figure 4 refraining from the operation of the present invention configured as described above are as follows.

먼저, Y 스타트 펄스는 액정패널이 수직방향으로 스캔(scan)하기 시작함을 나타내는 펄스신호이다. 결국, 상기 제1,2 액정패널(341,342)은 Y 스타트 펄스가 가해져야만 화면상에 디스플레이가 가능해진다.First, the Y start pulse is a pulse signal indicating that the liquid crystal panel starts scanning in the vertical direction. As a result, the first and second liquid crystal panels 341 and 342 can be displayed on the screen only when a Y start pulse is applied.

도 4에 도시된 바와 같이 제1 영상소스(311)로부터 필드 판별신호(FIELD ID)가 일정한 간격으로 발생하고, 상기 구동부(350)에서 60㎐의 Y 스타트 펄스를 발생하면, 상기 제2,3 멀티플렉서(361,362)는 서로 반대의 신호를 출력하여 상기 제1,2 액정패널(241,242)이 30㎐로 디스플레이를 수행하도록 한다.As shown in FIG. 4, when the field discrimination signal FIELD ID is generated from the first image source 311 at regular intervals, and the driving unit 350 generates the Y start pulse of 60 s, the second and the third signals are generated. The multiplexers 361 and 362 output opposite signals to each other so that the first and second liquid crystal panels 241 and 242 perform a display at 30 Hz.

이때, 상기 제1 영상소스(311)의 영상신호가 상기 신호처리부(320)로 전달되는 동안 상기 제2 멀티플렉서(361)는 제1 액정패널(341)이 디스플레이를 수행하도록 하고, 상기 제2 영상소스(312)의 영상신호가 상기 신호처리부(320)로 전달되는 동안 상기 제3 멀티플렉서(362)는 제2 액정패널(342)이 디스플레이를 수행하도록 한다. 즉, Y 스타트 펄스의 기수번째에서 제1 액정패널(341)이 동작하도록 하고, 우수번째에서 제2 액정패널(342)이 동작하도록 한다.In this case, while the image signal of the first image source 311 is transmitted to the signal processor 320, the second multiplexer 361 allows the first liquid crystal panel 341 to perform display and the second image. While the image signal of the source 312 is transmitted to the signal processor 320, the third multiplexer 362 causes the second liquid crystal panel 342 to perform display. That is, the first liquid crystal panel 341 is operated at the radix of the Y start pulse, and the second liquid crystal panel 342 is operated at the even of the even.

결국, 본 발명은 3개의 2:1 멀티플렉서를 이용하여 2개의 영상신호를 번갈아 신호처리하고, 2개의 액정패널을 번갈아 동작시킴으로써 2개의 영상신호가 개별적으로 2개의 액정패널에서 디스플레이 되도록 한다.As a result, the present invention alternately processes two video signals using three 2: 1 multiplexers and alternately operates the two liquid crystal panels so that the two video signals are displayed on the two liquid crystal panels individually.

이상에서 설명한 바와 같은 본 발명의 액정 표시 시스템은 구동부의 구동신호를 동시에 2개의 액정패널로 인가하되 액정패널의 동작을 제어하여 2개의 영상신호가 개별적으로 2개의 액정패널에서 디스플레이 되도록 하기 때문에 간단한 회로의 구성으로 신호처리부 및 구동부의 공유가 가능해지는 효과가 있다.As described above, the liquid crystal display system of the present invention applies a driving signal to the two liquid crystal panels simultaneously, but controls the operation of the liquid crystal panel so that the two image signals are displayed on the two liquid crystal panels separately. In this configuration, the signal processor and the driver can be shared.

Claims (2)

서로 다른 제1,2 영상소스로부터 영상신호를 동시에 입력받아 상기 제1 영상소스의 필드 판별신호(ID)에 따라 선택적으로 어느 하나의 영상소스를 출력시키는 제1 멀티플렉서(MUX)와, 상기 제1 멀티플렉서에서 출력되는 영상신호를 입력받아 신호를 처리하는 신호처리부와, 영상신호를 디스플레이하기 위한 제1,2 액정패널과, 상기 신호처리부의 처리 결과에 따라 상기 제1,2 액정패널로 구동신호를 출력시키는 구동부와, 상기 제1 영상소스의 필드 판별신호(ID)에 따라 상기 구동부에서 출력되는 Y 스타트 펄스(start pulse)를 입력받아 상기 제1,2 액정패널의 동작 제어신호를 출력시키는 제2,3 멀티플렉서를 포함하는 것을 특징으로 하는 액정 표시 시스템.A first multiplexer (MUX) for simultaneously receiving video signals from different first and second video sources and selectively outputting any one video source according to the field discrimination signal ID of the first video source, and the first multiplexer A signal processor for receiving a video signal output from the multiplexer and processing the signal, first and second liquid crystal panels for displaying the video signal, and driving signals to the first and second liquid crystal panels according to processing results of the signal processor. A second driving unit configured to output an operation control signal of the first and second liquid crystal panels by receiving a Y start pulse output from the driving unit according to the field discrimination signal ID of the first image source; And 3 a multiplexer. 제 1 항에 있어서,The method of claim 1, 상기 제2,3 멀티플렉서는 서로 반대의 신호를 출력하여 상기 제1,2 액정패널 중 어느 하나 만이 동작하도록 하는 것을 특징으로 하는 액정 표시 시스템.And the second and third multiplexers output signals opposite to each other so that only one of the first and second liquid crystal panels operates.
KR1019980003200A 1998-02-05 1998-02-05 Lcd display system KR100264460B1 (en)

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