KR960033085A - Screen Asymmetry Correction Device of Projection Image Display System - Google Patents

Screen Asymmetry Correction Device of Projection Image Display System Download PDF

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KR960033085A
KR960033085A KR1019950002727A KR19950002727A KR960033085A KR 960033085 A KR960033085 A KR 960033085A KR 1019950002727 A KR1019950002727 A KR 1019950002727A KR 19950002727 A KR19950002727 A KR 19950002727A KR 960033085 A KR960033085 A KR 960033085A
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signal
clock signal
image
memory
clock
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KR0159426B1 (en
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철 김
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배순훈
대우전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179Video signal processing therefor
    • H04N9/3185Geometric adjustment, e.g. keystone or convergence
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
    • H03K19/1733Controllable logic circuits
    • H03K19/1737Controllable logic circuits using multiplexers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording

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  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
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  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

본 발명은 투사형 화상표시시스템의 화면비대칭 보정장치에 관한 것으로, 광원에서 방사되는 광을 화상신호 전압에 의해 광변조해서 일정하게 형상화된 화상신호로서 투사렌즈(1a)를 통해 스크린(3)상에 투사하는 투사형 화상표시시스템에서, 상기 투사될 화상신호를 제1클럭신호에 의해 디지털변환하는 데이터변환수단(70)과, 상기 디지털변환된 화상데이터를 고속으로 메모리기록/독출하기 위한 기준클럭과 그 기준클럭으로부터 상기 제1클럭신호와 제2클럭신호를 얻는 제1 및 제2분주부(40,50), 상기 화상신호에 대한 메모리기록/독출기간을 결정하기 위한 제어신호와 상기 화상신호에 대한 보정데이터독출제어신호를 생성하는 제어신호생성수단(20), 상기 화상신호의 투사방향에 대응하여 상기 화상신호의 투사방향을 지정하기 위한 투사방향 선택부(10), 그 투사방향 선택부(10)에 의해 화상신호의 투사방향이 선택된 상태에서 상기 제어신호생성부(20)에서 제공되는 보정데이터독출제어신호에 의해 상기 화상신호에 대한 메모리독출 클럭신호를 선택하기 위한 보정데이터를 출력하는 보저데이터룩업테이블(30), 상기 보정데이터룩업테이블(30)에서 제공되는 보정데이터레 기초하여 상기 기준 클럭신호와 제1 및 제2보정클럭신호를 선택적으로 출력하기 위한 멀티플렉서(60), 그 멀티플렉서(60)에 의해 선택된 클럭신호에 기초하여 상기 데이터변환부(70)에서 변환된 화상신호를 기록/독출하는 FIFO메모리(80), 상기 멀티플렉서(60)에 의해 선택된 클럭신호에 의해 상기 메모리(80)에서 독취되는 화상신호데이터를 아날로그변환하는 데이터역변환부(90)를 포함하여 화상의 투사방향에 따라 비대칭화되는 화면을 보정하도록 된 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen asymmetry correction apparatus for a projection type image display system, wherein the light emitted from a light source is modulated by an image signal voltage to form a uniformly shaped image signal on a screen (3) through a projection lens (1a). In a projection type image display system for projecting, data conversion means 70 for digitally converting the projected image signal by a first clock signal, and a reference clock for memory recording / reading of the digitally converted image data at high speed and the First and second dividers 40 and 50 which obtain the first clock signal and the second clock signal from a reference clock, a control signal for determining a memory write / read period for the image signal, and Control signal generation means 20 for generating a correction data readout control signal, and a projection direction selector 1 for designating a projection direction of the image signal corresponding to the projection direction of the image signal. 0), the memory read clock signal for the image signal by the correction data read control signal provided from the control signal generation section 20 while the projection direction of the image signal is selected by the projection direction selector 10; And outputting the reference clock signal and the first and second correction clock signals on the basis of a compensation data lookup table 30 for outputting correction data for selecting a reference signal, and correction data provided from the correction data lookup table 30. To the FIFO memory 80 and the multiplexer 60 for recording / reading the image signal converted by the data conversion unit 70 based on the multiplexer 60, the clock signal selected by the multiplexer 60. And a data inverse converter 90 for analog-converting the image signal data read out from the memory 80 by the clock signal selected by the controller. It would be a positive.

Description

투사형 화상표시시스템의 화면비대칭 보정장치Screen Asymmetry Correction Device of Projection Image Display System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 투사형 화상표시시스템의 화면비대칭 보정장치를 나타낸 블럭구성도2 is a block diagram showing a screen asymmetry correction apparatus for a projection type image display system according to the present invention.

Claims (8)

광원에서 방사되는 광을 화상신호전압에 의해 광변조해서 일정하게 형상화된 화상신호로서 투사렌즈(1a)를 통해 스크린(3)상에 투사하는 투사형 화상표시스템에 있어서, 상기 투사될 화상신호를 제1클럭신호에 의해 디지털변환하는 데이터변환수단(70)과, 상기 디지털변환된 화상데이터를 고속으로 메모리기록/ 독출하기 위한 기준클럭과 그 기준클럭으로부터 상기 제1클럭신호와 제2클럭신호를 얻는 클럭생성수단(40,50), 상기 화상신호에 대한 메모리기록/독출기간을 결정하기 위한 제어신호와 상기 화상신호에 대한 보정데이터독출제어신호를 생성하는 제어신호생성수단(20), 상기 화상신호의 투사방향에 대응하여 상기 화상신호의 투사방향을 지정하기 위한 스위치소자로 구성된 투사방향 선택수단(10), 상기 투사방향 선택수단(10)에 의해 화상신호의 투사방향이 선택된 상태에서 상기 제어신호생성수단(20)에서 제공되는 보정데이터독출제어신호에 의해 상기 화상신호에 대한 메모리독출 클럭신호를 선택하기 위한 보정데이터를 출력하는 보정데이터룩업데이블수단(30), 상기 보정데이터룩업테이블수단(30)에서 제공되는 보정데이터에 기초하여 상기 기준클럭신호와 제1 및 제2보정 클럭신호를 선택적으로 출력하기 위한 클럭신호 선택수단(60), 상기 클럭신호 선택수단(60)에 의해 선택된 클럭신호에 기초하여 상기 데이터변환수단(70)에서 변환된 화상신호를 기록/독출하는 메모리수단(80), 상기 클럭신호 선택수단(60)에 의해 선택된 클럭신호에 의해 상기 메모리수단(80)에서 독취되는 화상신호데이터를 아날로그변환하는 데이터역변환수단(90)을 포함하여 화상의 투사방향에 따라 비대칭화되는 화면을 보정하도록 된 것을 특징으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.A projection type image table system in which light emitted from a light source is modulated by an image signal voltage to be projected onto a screen 3 through a projection lens 1a as a uniformly shaped image signal. Data conversion means 70 for digitally converting by one clock signal, a reference clock for memory recording / reading of the digitally converted image data at high speed, and obtaining the first clock signal and the second clock signal from the reference clock; Clock generation means 40 and 50, control signal generation means 20 for generating a control signal for determining a memory write / read period for the image signal and a correction data read control signal for the image signal, and the image Projection direction selection means (10) comprising switch elements for designating the projection direction of the image signal in correspondence with the projection direction of the signal, and the projection direction selection means (10) Correction data lookup means (30) for outputting correction data for selecting a memory read clock signal for the image signal by the correction data read control signal provided from the control signal generation means (20) with the projection direction selected Clock signal selection means 60 for selectively outputting the reference clock signal and the first and second correction clock signals based on the correction data provided from the correction data lookup table means 30, and the clock signal selection. The memory means 80 for recording / reading the image signal converted by the data conversion means 70 based on the clock signal selected by the means 60, to the clock signal selected by the clock signal selection means 60; A data inversely asymmetrical in accordance with the projection direction of the image, including data inverse conversion means 90 for analog-converting the image signal data read out from the memory means 80. And a screen asymmetry correction device for a projection image display system, characterized in that for correcting. 제1항에 있어서, 상기 클럭생성수단(40,50)은 상기 기준클럭을 2분주하여 상기 화상데이터의 메모리기록 및 정상적인 화상투사방향에서의 화상신호의 메모리독출을 위한 제1클럭신호를 생성하는 제1분주부(40)와, 그제1분주부(40)에 의해 분주된 제1클럭신호를 재차 2분주하여 저속의 화상 신호의 메모리독출을 위한 제2클럭신호를 생성하는 제2분주부(50)로 구성된 것을 특징으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.2. The clock generating means according to claim 1, wherein the clock generating means (40, 50) divides the reference clock into two to generate a first clock signal for memory recording of the image data and memory reading of the image signal in a normal image projection direction. A second divider for dividing the first divider 40 and the first clock signal divided by the first divider 40 again to generate a second clock signal for reading a low-speed image signal; 50) an asymmetry correction device for a projection type image display system, characterized in that consisting of. 제1항에 있어서, 상기 보정데이터 룩업테이블수단(30)에는 상기 투사방향 선택수단(10)에 의해 선택되는 상기 화상신호의 투사방향에 따라 상기 투사될 화상신호의 상측과 중간 및 하측에서 상호 다른 클럭신호로 상기 화상신호를 메모리독출하도록 상기 클럭신호를 스위칭적으로 선택하기 위한 보정데이터가 테이블화되어 저장된 것을 특징으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.2. The correction data lookup table means (30) according to claim 1, wherein the correction data lookup table means (30) differs from the upper side, the middle side, and the lower side of the image signal to be projected according to the projection direction of the image signal selected by the projection direction selecting means (10). And a correction data for switching the clock signal to switch the memory to read out the image signal as a clock signal. 제3항에 있어서, 상기 보정데이터 룩업테이블수단(30)에는 출력되는 보정데이터는 상기 화상신호의 정상적인 투사방향의 선택시 메모리기록 클럭신호와 메모리독출 클럭신호가 동일한 속도를 갖는 클럭신호가 선택되도록 설정된 것을 특징으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.The correction data output to the correction data look-up table means 30 selects a clock signal having the same speed as the memory write clock signal and the memory read clock signal when the normal projection direction of the image signal is selected. A screen asymmetry correction apparatus for a projection type image display system, characterized in that set. 제3항에 있어서, 상기 보정데이터 룩업테이블수단(30)에는 출력되는 보정데이터는 상기 투사방향 선택수단(10)에 의해 하향의 화상 투사방향이 선택되면 상기 화상신호에 의해 형성되는 화면의 상측부분의 동기신호 영역과 공백영역(즉, 비대칭화면에서의 축소된 화면영역)에서는 고속의 메모리독출이 행해지는 반면 화상신호가 존재하는 영역에서는 저속의 메모리독출이 행해지도록 하고, 상기 화면의 중간부분의 동기신호영역에서는 고속의 메모리독출이 행해지는 반면 공백영역(즉, 비대칭화면에서의 축소된 화면영역)에서는 저속의 메모리독출이 행해지도록 하고 화상신호가 존재하는 영역에서는 상기 메모리기록시에 적용된 클럭신호에 의한 메모리독출이 행해지도록 하며, 그 화면의 하측부분에서는 상기 화상신호의 메모리기록 속도와 동등한 클럭신호로 메모리독출되도록 설정된 것을 특지으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.4. The upper portion of the screen formed by the image signal according to claim 3, wherein the correction data output to the correction data lookup table means (30) is formed by the image signal when a downward image projection direction is selected by the projection direction selection means (10). In the synchronous signal area and the blank area (i.e., the reduced screen area in an asymmetrical screen), a high speed memory readout is performed while a low speed memory readout is performed in an area where an image signal exists. A high speed memory readout is performed in the synchronous signal area while a low speed memory readout is performed in a blank area (i.e., a reduced screen area in an asymmetrical screen), and a clock signal applied at the time of memory writing in an area in which an image signal exists. Memory readout is performed by the memory readout, and at the lower portion of the screen, the memory write speed of the A screen asymmetry correction apparatus for a projection type image display system, which is characterized in that the memory is read out by a clock signal. 제3항에 있어서, 상기 보정데이터 룩업테이블수단(30)의 보정데이터는 상기 투사방향 선택수단(10)에 의해 상향의 화상 투사방향이 선택되면 상기 화상신호에 의해 형성되는 화면의 상측부분의 동기신호영역에서는 메모리기록시와 동등한 속도로 메모리독출되도록 하는 한편 상기 화면의 상측부분에서는 고속의 메모리독출이 행해지도록 하고, 상기 화면의 중간부분의 동기신호영역과 공백영역(즉, 비대칭화면에서의 축소된 화면영역)에서는 고속의 메모리독출이 행해지도록 하고 그 화면의 상측부분에서는 저속의 메모리 독출이 행해지도록 설정된 것을 특징으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.4. The correction data of the correction data look-up table means (30) is characterized in that synchronization of the upper portion of the screen formed by the image signal when an upward image projection direction is selected by the projection direction selection means (10). In the signal area, the memory is read at the same speed as the memory proxy, while in the upper part of the screen, the memory is read at a high speed, and the synchronization signal area and the blank area in the middle part of the screen (i.e., reduction in asymmetrical screen). And a high-speed memory readout in the upper screen area, and a low-speed memory readout in the upper portion of the screen. 제1항에 있어서, 상기 클럭신호 선택수단(60)은 상기 화상신호의 정상적인 투사방향에서는 상기 제1클럭신호를 스위칭출력하고, 하향의 화상투사방향에서는 상기 보정데이터에 의해 지정되는 형태로 상기 기준클럭과 제1클럭신호 및 제2클럭신호를 스위칭적으로 출력하며, 상향의 화상 투사방향에서는 상기 보정데이터에 의해 지정되는 형태로 상기 기준클럭과 제1클럭신호 및 제2클럭신호를 스위칭적으로 출력하는 멀티플렉서로 구성된 것을 특징으로 하는 투사형 화상표시시스템의 화면비대칭 보정장치.The reference signal according to claim 1, wherein the clock signal selecting means (60) switches out the first clock signal in a normal projection direction of the image signal, and is designated by the correction data in a downward image projection direction. Outputs a clock, a first clock signal and a second clock signal in a switching manner, and switches the reference clock, the first clock signal and the second clock signal in a form designated by the correction data in an upward image projection direction. A screen asymmetry correction apparatus for a projection type image display system, characterized in that the output is composed of a multiplexer. 제1항에 있어서, 상기 제1클럭신호와 상기 클럭신호 선택수단에 의해 선택된 클럭신호를 스위칭하여 상기데이터역변환수단에 의한 데이터 처리속도를 결정하기 위한 스위칭수단(100)이 더 포함되어 구성된 것을 특징으로하는 투사형 화상표시시스템의 화면비대칭 보정장치.The method of claim 1, further comprising switching means (100) for switching the first clock signal and the clock signal selected by the clock signal selection means to determine the data processing speed by the data inverse conversion means. Asymmetry correction device for a projection image display system. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950002727A 1995-02-15 1995-02-15 Distorted picture image correction apparatus for projector system KR0159426B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100323666B1 (en) * 1999-08-12 2002-02-07 구자홍 Method and apparatus for compensating clock phase of monitor
KR100378359B1 (en) * 1996-10-31 2003-05-22 삼성전자주식회사 Laser projection display

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100408506B1 (en) * 1996-10-31 2004-01-24 삼성전자주식회사 Laser projection display

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100378359B1 (en) * 1996-10-31 2003-05-22 삼성전자주식회사 Laser projection display
KR100323666B1 (en) * 1999-08-12 2002-02-07 구자홍 Method and apparatus for compensating clock phase of monitor

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