KR20040010953A - An apparatus for fixing focusing of projection lens - Google Patents

An apparatus for fixing focusing of projection lens Download PDF

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Publication number
KR20040010953A
KR20040010953A KR1020020043996A KR20020043996A KR20040010953A KR 20040010953 A KR20040010953 A KR 20040010953A KR 1020020043996 A KR1020020043996 A KR 1020020043996A KR 20020043996 A KR20020043996 A KR 20020043996A KR 20040010953 A KR20040010953 A KR 20040010953A
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KR
South Korea
Prior art keywords
focus
projection lens
lens
fixing
focusing
Prior art date
Application number
KR1020020043996A
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Korean (ko)
Inventor
송진한
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020020043996A priority Critical patent/KR20040010953A/en
Publication of KR20040010953A publication Critical patent/KR20040010953A/en

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Classifications

    • 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]
    • H04N9/3141Constructional details thereof
    • H04N9/317Convergence or focusing systems
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/142Adjusting of projection optics

Abstract

PURPOSE: A device for fixing focusing of a projection lens is provided to maintain a fitted focus by a focusing fixing device, thereby preventing rework due to focus distortion and unclear pictures. CONSTITUTION: If a focus adjusting handle(4) having a screw is rotated by using an exclusive tool, another screw installed in a focus lens barrel(3) assembled with a main body of a projection lens(2) is turned to move the focus lens barrel backward and forward following an optical axis, so a focus of the projection lens is adjusted. A fixing screw(6) of a focusing fixing device(5) engaged with the screw of the focus adjusting handle is screwed to couple the focusing fixing device with the focus adjusting handle.

Description

투사렌즈의 포커싱 고정장치 {An apparatus for fixing focusing of projection lens}An apparatus for fixing focusing of projection lens

본 발명은 프로젝션 TV용 투사렌즈에 관한 것으로, 더욱 상세하게는 프로젝션 렌즈의 포커스 조정의 틀어짐을 방지하기 위한 장치에 관한 것이다.TECHNICAL FIELD The present invention relates to a projection lens for a projection TV, and more particularly, to an apparatus for preventing distortion of focus adjustment of a projection lens.

영상투사장치는 소형의 음극선관이나 액정표시소자등의 영상발생수단을 사용하여 영상을 발생시키고 이를 광학계를 통하여 확대하여 대형 스크린에 투사시키는 방식으로, 최근 멀티미디어 기술의 발달에 힘입에 날로 그 수요가 증가되고 있는 제품이다.Image projection is a method of generating an image by using image generating means such as a small cathode ray tube or a liquid crystal display device, and then expanding it through an optical system and projecting it on a large screen. It is a growing product.

이와 같은 영상투사기술에 의한 프로젝터나 프로젝션 TV등이 일반적으로 사용되고 있으며, 일반적인 프로젝션 TV는 기본적으로, 본체와 음극선관(CRT) 또는 액정패널(LCD)등의 영상발생장치와, 상기 발생된 영상을 확대하는 프로젝션 렌즈계, 이를 결상시키는 대형 스크린등의 구성을 갖는다.Projectors and projection TVs using such image projection technology are generally used, and general projection TVs basically include a main body, an image generating device such as a cathode ray tube (CRT) or a liquid crystal panel (LCD), and the generated image. It has a configuration such as an enlarged projection lens system, a large screen to form the image.

스크린에 표시되는 화상은 프로젝션 렌즈의 포커스에 의해 그 선명도에 큰 차이를 갖게 되므로 제품을 조립시 프로젝션 렌즈의 포커스를 맞춘후 고정시키게 된다.Since the image displayed on the screen has a big difference in the sharpness due to the focus of the projection lens, the assembly is fixed after focusing the projection lens when assembling the product.

상기 포커스는 제품이 생산된 후 제품에 어떤 충격이 가해지더라도 틀어지지 않아야 선명하고 깨끗한 화면을 표시할 수 있다.The focus may display a clear and clear screen when the product is produced, but no impact is applied to the product.

이하 도1에 의해 종래의 프로젝션 렌즈의 포커스 고정구조를 나타낸다.1 shows a focus fixing structure of a conventional projection lens.

렌즈하우징 고정대(1)에 의해 고정된 투사렌즈(2)와, 상기 투사렌즈(2)본체에 고정되어 렌즈를 전후로 움직여 포커스 조정하는 포커스 렌즈바렐(3), 상기 포커스 렌즈바렐(3)에 연결되어 상기 포커스 렌즈바렐(3)의 위치를 조종하는 포커스 조정 손잡이(4)로 구성되어 있다.A projection lens 2 fixed by a lens housing holder 1, a focus lens barrel 3 fixed to the projection lens 2 body to move the lens back and forth to adjust focus, and a focus lens barrel 3; And a focus adjusting knob 4 for controlling the position of the focus lens barrel 3.

상기 손잡이(4)를 이용하여 포커스 렌즈바렐(3)을 움직여 상기 투사렌즈(2)의 포커스를 맞춘 후 해당 위치는 상기 포커스 조정 손잡이(4)가 움직이지 않도록 고정한다. 고정하는 방법은 상기 손잡이(4)에 장착된 나사의 체결력만으로 고정하는 방법과, 상기 손잡이(4)부분에 테이프를 붙여 움직임이 발생하지 않도록 하는 방법을 취한다.After moving the focus lens barrel 3 using the knob 4 to focus the projection lens 2, the corresponding position is fixed so that the focus adjustment knob 4 does not move. The fixing method is a method of fixing only the fastening force of the screw mounted on the handle 4, and a method of attaching a tape to the handle 4 so as not to cause a movement.

그러나, 이런 고정방법은 외부의 충격이나 온도등의 환경변화에 쉽게 테이프가 떨어지거나 나사가 풀려 포커스가 틀어질 가능성을 가지고 있다.포커스가 어긋나게 되면 스크린에서는 선명한 화질의 영상을 표시할 수 없게 된다는 문제점이 있어, 다시 포커스 조정을 해야만 하는 재작업의 어려움이 있었다.However, this method of fixing has the possibility of tape dropping or screwing out of focus due to changes in the environment such as external shock or temperature, and the focus is shifted. If the focus is shifted, the screen cannot display a clear image. There was a difficulty in rework, which would have to be refocused.

본 발명은 전술한 문제점을 해소하기 위하여 고안된 것으로, 프로젝션 렌즈의 포커스가 고정된 위치가 외부환경의 변화나 충격에도 안정된 고정구조를 갖도록 하는데 그 목적이 있다.The present invention has been devised to solve the above-mentioned problems, and its object is to have a fixed structure in which the position where the focus of the projection lens is fixed is stable even when the external environment is changed or impacted.

도1은 종래의 투사렌즈의 포커스 조정 장치의 구조1 is a structure of a focus adjustment apparatus of a conventional projection lens

도2는 본 발명의 투사렌즈의 포커스 조정 장치의 구조2 is a structure of a focus adjustment apparatus of a projection lens of the present invention

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

1: 렌즈하우징 2: 투사렌즈 3: 포커스 렌즈바렐1: lens housing 2: projection lens 3: focus lens barrel

4: 포커스조정손잡이 5: 포커스고정장치 6: 포커스 고정나사4: Focusing knob 5: Focus lock 6: Focus lock screw

전술한 목적을 달성하기 위하여 본 발명의 프로젝션 TV용 투사렌즈의 포커스조정장치의 구조는 포커스 조정장치를 포커싱 동작후 조정된 위치로 고정시키기 휘한 포커스 고정장치를 추가한 것을 특징으로 한다.In order to achieve the above object, the structure of the focusing apparatus of the projection lens for a projection TV of the present invention is characterized by adding a focus fixing apparatus for fixing the focusing apparatus to the adjusted position after the focusing operation.

이하, 도2를 이용하여 본 발명의 일실시예에 대한 상세한 구성을 설명하면 다음과 같다Hereinafter, a detailed configuration of an embodiment of the present invention using FIG. 2 will be described.

렌즈하우징 고정대(1)에 의해 고정되어 영상을 스크린에 투사하는 투사렌즈(2)와, 상기 투사렌즈(2)본체에 고정되어 렌즈를 광축을 따라 전후로 이동시켜 포커스 조정하는 포커스 렌즈바렐(3), 상기 포커스 렌즈바렐(3)에 연결되어 상기 포커스 렌즈바렐(3)의 위치를 조종하는 포커스 조정 손잡이(4)와, 상기 포커스 조정 손잡이(4)를 포커스 조정 후 위치로 고정시키는 포커스 고정장치 (5), 상기 포커스 고정장치의 움직임을 막는 고정나사(6)로 구성되어 있다.A projection lens (2) fixed by a lens housing holder (1) to project an image onto the screen, and a focus lens barrel (3) fixed to the body of the projection lens (2) to move the lens back and forth along the optical axis to adjust the focus A focus adjusting knob 4 connected to the focus lens barrel 3 for controlling the position of the focus lens barrel 3 and a focus fixing device for fixing the focus adjusting knob 4 to a position after focus adjustment ( 5) and a fixing screw 6 for preventing the movement of the focus holding device.

상기의 실시예에 의한 동작을 설명하면 다음과 같다.The operation according to the above embodiment is described as follows.

나사가 가공이 되어 있는 포커스 조정 손잡이 (4)를 전용 조정공구를 사용하여 원하는 방향으로 회전시키면 상기 투사렌즈(2)의 본체에 조립되어져 있는 포커스 렌즈 바렐(3)에 설치된 나사를 돌리게 되고 이에 따라 상기 렌즈바렐(3)이 광축을 따라 전후로 움직이게 되어 상기 투사렌즈(2)의 포커스가 조정 된다. 이렇게 포커스 조정이 끝나면 상기 포커스 조정 손잡이에 설치된 나사부와 맞물려 상기 나사부의 회전을 제한하는 상기 포커스고정장치(5)에 달린 고정나사(6)를 돌려 상기 고정장치(5)를 포커스 조정 손잡이부(4)에 체결한다. 상기 고정장치(5)에 의해 고정손잡이는 완전하게 고정되어 이후에 발생하는 어떤 물리적인 충격이나 변화에도 움직이지 않게 되어 조립시 맞춰진 포커스가 유지된다.Rotating the focus adjustment knob 4 in which the screw is processed in a desired direction using a dedicated adjustment tool turns the screw installed in the focus lens barrel 3 assembled to the main body of the projection lens 2, and accordingly The lens barrel 3 moves back and forth along the optical axis so that the focus of the projection lens 2 is adjusted. After the focus adjustment is completed, the fixing device 6 is rotated by the fixing screw 6 attached to the focus fixing device 5 which engages with the screw part installed on the focus adjusting knob to limit the rotation of the screw part. ) The fixing handle is completely fixed by the fixing device 5 so that it does not move in the event of any physical shock or change occurring thereafter, so that the focused focus is maintained during assembly.

이상에서 살펴본 바와 같아 본 발명의 프로젝션 TV용 투사렌즈의 포커싱 고정장치에 의해, 포커싱 후 외부의 충격을 받더라고 별도로 포커스 조정장치에 설치된 고정장치에 의해 고정되므로, 포커스가 틀어짐에 따른 재작업이나, 선명하지 않은 화상의 발생문제가 해소되어 안정적인 깨끗한 화면을 제공하게 된다.As described above, since the focusing fixing device of the projection lens for projection TV of the present invention is fixed by a fixing device installed separately in the focus adjusting device even after receiving an external impact after focusing, reworking according to the focus is shifted, The problem of unclear image generation is solved to provide a stable and clean screen.

Claims (2)

렌즈하우징 고정대(1)와, 상기 렌즈하우징 고정대(1)에 의해 고정되어 영상을 스크린에 투사하는 투사렌즈(2)와, 상기 투사렌즈(2)에 고정되어 렌즈를 광축을 따라 전후로 이동시켜 포커스 조정하는 포커스 렌즈바렐(3), 상기 포커스 렌즈바렐(3)에 연결되어 상기 포커스 렌즈바렐(3)의 위치를 조종하는 포커스 조정 손잡이(4)와, 상기 포커스 조정 손잡이(4)를 포커스 조정 후 위치로 고정시키는 포커스 고정장치 (5), 상기 포커스 고정장치의 움직임을 막는 고정나사(6)로 구성된 것을 특징으로 하는 투사렌즈의 포커스 고정장치.A lens housing fixture (1), a projection lens (2) fixed by the lens housing holder (1) to project an image on the screen, and fixed to the projection lens (2) to move the lens back and forth along the optical axis to focus The focus lens barrel 3 to be adjusted, the focus adjustment knob 4 connected to the focus lens barrel 3 to control the position of the focus lens barrel 3, and the focus adjustment knob 4 after focus adjustment. Focus fixing device for the projection lens, characterized in that consisting of a fixing screw (6) to prevent movement of the focus holding device fixed to the position. 제 1항에 있어서, 상기 포커스 조정장치는 상기 포커스 조정 손잡이에 맞물려서 이동을 제한하도록 위치하는 것을 특징으로 하는 투사렌즈의 포커스 고정장치.The focus lock apparatus of claim 1, wherein the focus adjustment device is positioned to engage the focus adjustment knob to limit movement.
KR1020020043996A 2002-07-25 2002-07-25 An apparatus for fixing focusing of projection lens KR20040010953A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101009298B1 (en) * 2010-07-08 2011-01-19 (주)드림즈컴트루 Retracter and sporting apparatus for spinal correction and back pain decrease
CN110007544A (en) * 2019-05-22 2019-07-12 向茂勇 A kind of multifunctional condensing projecting cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101009298B1 (en) * 2010-07-08 2011-01-19 (주)드림즈컴트루 Retracter and sporting apparatus for spinal correction and back pain decrease
CN110007544A (en) * 2019-05-22 2019-07-12 向茂勇 A kind of multifunctional condensing projecting cylinder

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