KR970006693B1 - An optical path regulating apparatus of projection type of image display - Google Patents
An optical path regulating apparatus of projection type of image display Download PDFInfo
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- KR970006693B1 KR970006693B1 KR1019930024397A KR930024397A KR970006693B1 KR 970006693 B1 KR970006693 B1 KR 970006693B1 KR 1019930024397 A KR1019930024397 A KR 1019930024397A KR 930024397 A KR930024397 A KR 930024397A KR 970006693 B1 KR970006693 B1 KR 970006693B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
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Abstract
Description
제1도는 종래 투사형 화상표시장치의 광로조절장치 구조의 일 실시예를 나타낸 사시도.1 is a perspective view showing an embodiment of a structure of an optical path control apparatus of a conventional projection type image display apparatus.
제2도는 본 발명 투사형 화상표시장치의 광로조절장치 구조의 일 실시예를 나타낸 사시도.2 is a perspective view showing an embodiment of the structure of the optical path adjusting apparatus of the present invention projection type image display apparatus.
제3도는 제2도의 동작을 설명하기 위한 측면도.3 is a side view for explaining the operation of FIG.
제4도는 본 발명 투사형 화상표시장치의 광로조절장치 구조의 다른 실시예를 나타낸 사시도.4 is a perspective view showing another embodiment of the structure of the optical path adjusting apparatus of the present invention projection type image display apparatus.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 지지대 11 : 세라믹10 support 11 ceramic
12, 13 : 거울12, 13: mirror
본 발명은 투사형 화상표시장치의 광로조절장치 구조에 관한 것으로, 특히 광로조절장치의 구동을 개선하기에 적합한 투사형 화상표시장치의 광로조절장치 구조에 관한 것이다.The present invention relates to a structure of an optical path control device of a projection image display device, and more particularly to a structure of an optical path control device of a projection image display device suitable for improving the driving of the optical path control device.
일반적으로, 화상표시장치는 표시방법에 따라 직시형 화상표시장치와 투사형 화상표시장치로 구분된다.In general, an image display apparatus is classified into a direct view type image display apparatus and a projection type image display apparatus according to a display method.
먼저, 직시형 화상표시장치로는 음극선관(cathode ray tube; CRT) 등이 있는데, 이러한 음극선관은 화질이 좋으나, 화면이 커짐에 따라 중량 및 두께의 증대와원가가 비싸지는 결점이 있다.First of all, a direct view type image display apparatus includes a cathode ray tube (CRT). Such a cathode ray tube has a high image quality, but has a drawback of increasing weight and thickness and cost as the screen is enlarged.
다음, 투사형 화상표시 장치로는 대화면 액정 디스플레이(active matrix liquide crystal display; AMLCD)등이 있는데, 이러한 대화면 액정 디스플레이는 박형화가 가능하여 중량을 작게할 수는 있으나, 편광판에 의한 광손실이 크고 액정 디스플레이를 구동하기 위한 박막 트랜지스터(thin film transistor; TFT)가 각 화소마다 형성되어 있기 때문에 개구율(광의 투과면적)을 높이는데 한계가 있으므로 광의 효율이 매우 낮다.Next, a projection type image display apparatus includes an active matrix liquide crystal display (AMLCD), which can be thin and can be reduced in weight, but has a large light loss due to a polarizing plate and a liquid crystal display. Since thin film transistors (TFTs) for driving LEDs are formed for each pixel, there is a limit in increasing the aperture ratio (light transmission area), so the light efficiency is very low.
따라서, 그 액정 디스플레이의 상기와 같은 단점을 해결하기 위하여 미합중국 Aura사에 의해 광로조절 장치중의 하나인 AMA(actuated, mirror arrays)를 이용한 투사형 화상표시장치가 개발되었다.Therefore, in order to solve the above disadvantages of the liquid crystal display, a projection type image display apparatus using AMA (actuated, mirror arrays), which is one of optical path control apparatuses, has been developed by Aura.
또한, AMA는 구동 방식에 따라 액츄에이터가 MX1의 매트릭스로로 된1차원 AMA와 액츄에이터가 MXN의 매트릭스로 된 2차원 AMA로 구분된다.In addition, AMA is classified into a two-dimensional AMA in which the actuator is a matrix of MX1 and a two-dimensional AMA in which the actuator is a matrix of MXN, depending on the driving method.
이때, M과 N은 임의의 정수이다.At this time, M and N are arbitrary integers.
그리고, 상기 AMA를 구성하는 각 액추에이터는 압전소자나 전왜소자로 이루어져 그 압전소자나 전왜소자에 전압이 인가될 경우, 전계가 발생하므로써 변형되어 상부에 장착된 거울을 기울어지게 하므로 그 각 거울에 반사되는 빛이 해당 렌즈 등을 통해 화면의 일정 부분에 도달하게 되어 원하는 영상을 디스플레이할 수 있다.Each actuator constituting the AMA consists of a piezoelectric element or an electrostrictive element, and when a voltage is applied to the piezoelectric element or electrostrictive element, an electric field is generated to deform and tilt the mirror mounted on the upper side so that the mirror is mounted on the mirror. The incoming light reaches a certain portion of the screen through the lens and the like to display a desired image.
제1도는 종래 투사형 화상표시장치의 광로조절장치 구조의 일 실시예를 나타낸 사시도로, 다수의 박막 트랜지스터로 이루어진 구동 기판(1) 위에 신호전극(금속)(2)이 선택적으로 형성되며, 신호전극(2) 위에 세라믹(전왜세라믹 또는 압전 세라믹)(3)이 선택적으로 상부에 홈을 이루며 형성되며, 그 세라믹(3) 표면에 바이어스전극(금속)(4)이 형성되고 지지대가(5) T자 형태로 되어 상기 세라믹(3)의 홈에 박혀 있으며, 지지대(5) 표면에 거울(금속)(6)이 형성되어 이루어진다.1 is a perspective view showing an embodiment of a structure of an optical path control apparatus of a conventional projection type image display apparatus, in which a signal electrode (metal) 2 is selectively formed on a driving substrate 1 composed of a plurality of thin film transistors, and a signal electrode (2) On top of the ceramic (electrically-ceramic or piezoelectric ceramic) (3) is formed selectively grooved on the top, a bias electrode (metal) (4) is formed on the surface of the ceramic (3) and the support (5) T It is formed in the shape of a ruler and is embedded in the groove of the ceramic 3, and the mirror (metal) 6 is formed on the surface of the support (5).
이와 같이 이루어지는 종래 투사형 화상표시장치의 광로조절장치를 보면, 각 바이어스전극(4)을 접지하고 구동 기판(1)내의 각 박막 트랜지스터의 구동에 의해 신호전극(2)에 화상을 형성하기 위한 신호가 선택적으로 인가되므로써 전압이 인가되는 세라믹(3)은 폴링(poling))된 방향에 의해 변형된다.In the optical path control apparatus of the conventional projection type image display device configured as described above, a signal for grounding each bias electrode 4 and driving each thin film transistor in the driving substrate 1 to form an image on the signal electrode 2 is provided. The ceramic 3 to which the voltage is applied by being selectively applied is deformed by the polled direction.
따라서, 그 세라믹(3)의 변형에 의해 각 거울(6)이 경사지게 되므로 화상을 형성하기 위한 광이 그 각 거울(6)에 반사되어 해당 렌즈를 통해 화면의 일정 부분에 도달하게 되므로써 원하는 영상을 디스플레이할 수 있다.Therefore, each mirror 6 is inclined by the deformation of the ceramic 3, so that light for forming an image is reflected by the mirrors 6 to reach a certain portion of the screen through the corresponding lens, thereby producing a desired image. Can be displayed.
그러나, 이와 같은 종래의 기술에 있어서는 광로조절장치가 장시간 구동하므로써 지지대(5)가 열화될 경우, 거울(6) 전체 구동이 불량하게 되어 결국, 광효율이 저하되므로써 화질이 저하한다.However, in such a conventional technique, when the support 5 is deteriorated by driving the optical path control device for a long time, the entire driving of the mirror 6 becomes poor, and as a result, the image quality is lowered by lowering the light efficiency.
본 발명은 이와 같은 종래 의 결점을 해결하기 위하여 안출한 것으로, 거울을 양 측면에서 구동하도록 하므로써 장시간 구동시에도 안정된 구동을 유지할 수 있는 투사형 화상표시장치의 광로조절장치 구조를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a structure of an optical path control apparatus of a projection type image display device that can maintain stable driving even when driving for a long time by driving mirrors from both sides. .
이하, 이와 같은 목적을 달성하기 위한 본 발명을 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings the present invention for achieving the above object is as follows.
제2도는 본 발명 투사형 화상표시장치의 광로조절장치 구조의 일 실시예를 나타낸 사시도로, 거울(12)은 양측이 직각으로 찢어진 형태로 형성되고 그 찢어진 부분의 거울(12) 하부에 바이어스전극(금속)(도면중에 도시되지 않음) 및 세라믹(전왜세라믹 또는 압전세라믹)(11)이 차례로 형성된다.2 is a perspective view showing an embodiment of the structure of the optical path control apparatus of the projection type image display device of the present invention, wherein the mirror 12 is formed in a shape in which both sides are torn at right angles, and a bias electrode (below the mirror 12 of the torn portion) A metal (not shown in the figure) and a ceramic (electrodistoric or piezoceramic) 11 are formed in turn.
또한, 그 세라믹(11) 하부 일측에 신호전극(금속)(도면중에 도시되지 않음)이 형성되고 그 신호전극 부분을 제외한 세라믹(11) 하부에 지지대(세라믹)(10)가 형성되어 이루어진다.In addition, a signal electrode (metal) (not shown) is formed on one side of the lower portion of the ceramic 11, and a support (ceramic) 10 is formed on the lower portion of the ceramic 11 except for the signal electrode portion.
이와 같이 이루어지는 본 발명 투사형 화상표시장치의 광로조절장치를 제3도를 참조하여 보면, 각 바이어스전극을 접지하고 지지대(10) 하부에 접속된 구동 기판내의 각 박막 트랜지스터의 구동에 의해 각 신호 전극에 화상을 형성하기 위한 신호가 선택적으로 인가되므로써 전압이 인가되는 세라믹(11)은 폴링된 방향에 의해 변형된다.Referring to FIG. 3, the optical path adjusting device of the present invention projection type image display device is grounded to each signal electrode by driving each thin film transistor in the driving substrate connected to the lower part of the support 10. FIG. By selectively applying a signal for forming an image, the ceramic 11 to which a voltage is applied is deformed by the polled direction.
따라서, 그 세라믹(11)의 변형에 의해 제3도와 같이 각 거울(12)이 경사지게 되므로 화상을 형성하기 위한 광이 그 각 거울(12)에 반사되어 해당 렌즈를 통해 화면의 일정 부분에 도달하게 되므로써 원하는 영상을 디스플레이할 수 있다.Therefore, each mirror 12 is inclined by the deformation of the ceramic 11 as shown in FIG. 3 so that light for forming an image is reflected by the mirrors 12 to reach a certain portion of the screen through the corresponding lens. Thus, the desired image can be displayed.
이때, 구동시, A 부분 및 B 부분의 거울(12)은 신호전극이 없는 부분으로 거울(12)의 변형이 없으며, C 부분 및 D 부분의 거울(12)은 2차 곡선의 형태로 변형되므로써 그 부분에서 약간의 광손실이 유발된다.At this time, during driving, the mirror 12 of the A part and the B part has no signal electrode, and there is no deformation of the mirror 12, and the mirrors 12 of the C part and the D part are deformed in the form of a quadratic curve. Some light loss is caused in that part.
그리고, 상기 A-D 부분을 제외한 거울(12)은 제3도와 같이 선형적으로 변형하므로 광손실이 거의 없다.In addition, since the mirror 12 excluding the A-D portion is linearly deformed as shown in FIG. 3, there is almost no light loss.
제4도는 본 발명 투사형 화상표시장치의 광로조절장치 구조의 다른 실시예를 나타낸 사시도로, 거울(13)의 양측을 직각형태로 찢어진 형태로 하지 않고 양측의 일정 부분을 평행하게 제거된 형태로 할 수도 있다.4 is a perspective view showing another embodiment of the structure of the optical path adjusting device of the projection type image display device of the present invention, in which both sides of the mirror 13 are not torn at right angles, and a predetermined portion of both sides is removed in parallel. It may be.
이상에서 설명한 바와 같이 본 발명은 거울(12,13)을 양측에서 지지하여 거울(12,13)이 선형적으로 구동하도록 하므로써 광효율이 높아져 화질 및 휘도가 개선되고 소형화가 가능하며, 변위가 커지는 효과가 있다.As described above, the present invention supports the mirrors 12 and 13 from both sides, so that the mirrors 12 and 13 are linearly driven, thereby improving light efficiency, improving image quality and luminance, miniaturizing, and increasing displacement. There is.
Claims (2)
Priority Applications (19)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930024397A KR970006693B1 (en) | 1993-11-16 | 1993-11-16 | An optical path regulating apparatus of projection type of image display |
| EP94118035A EP0653657B1 (en) | 1993-11-16 | 1994-11-15 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
| PCT/KR1994/000164 WO1995014351A1 (en) | 1993-11-16 | 1994-11-15 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
| CZ19961413A CZ287202B6 (en) | 1993-11-16 | 1994-11-15 | Array of actuated mirrors intended particularly for use in optical projection systems and method for the manufacture thereof |
| DE69423070T DE69423070T2 (en) | 1993-11-16 | 1994-11-15 | Arrangement of controlled thin-film mirrors for an optical projection system and method for their production |
| ITMI942309A IT1271062B (en) | 1993-11-16 | 1994-11-15 | SET OF THIN FILM-OPERATED MIRRORS FOR USE IN AN OPTICAL PROJECTION SYSTEM AND METHOD FOR ITS MANUFACTURE |
| CN94194178A CN1047904C (en) | 1993-11-16 | 1994-11-15 | Array of thin film actuated mirrors for use in an optics projection system and method for mfg. same |
| PL94314420A PL175809B1 (en) | 1993-11-16 | 1994-11-15 | System of movable thin-layer mirrors for use in an apparatus for optical projection and method of making such system |
| JP51435395A JP3253304B2 (en) | 1993-11-16 | 1994-11-15 | M × N thin-film actuated mirror array used in light projection system and method of manufacturing the same |
| HU9601201A HU220515B1 (en) | 1993-11-16 | 1994-11-15 | Array of thin film actuated mirrors and method for the manufacture thereof |
| AU11215/95A AU693139B2 (en) | 1993-11-16 | 1994-11-15 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
| BR9408054A BR9408054A (en) | 1993-11-16 | 1994-11-15 | Arrangement of M X N mobile thin film mirrors for use in an optical projection system Optical projection system Method for manufacturing an arrangement of M X N mobile thin film mirrors for use in an optical projection system |
| RU96113083A RU2125347C1 (en) | 1993-11-16 | 1994-11-15 | Array of thin-film controlled reflectors for optical projection system and its manufacturing process |
| ES94118035T ES2145086T3 (en) | 1993-11-16 | 1994-11-15 | MATRIX OF THIN FILM DRIVEN MIRRORS INTENDED FOR AN OPTICAL PROJECTION SYSTEM AND ITS MANUFACTURING METHOD. |
| CA002176347A CA2176347A1 (en) | 1993-11-16 | 1994-11-15 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
| US08/340,762 US5835293A (en) | 1993-11-16 | 1994-11-16 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
| TW083110725A TW266328B (en) | 1993-11-16 | 1994-11-18 | |
| US09/150,747 US5984481A (en) | 1993-11-16 | 1998-09-10 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
| US09/150,773 US6030083A (en) | 1993-11-16 | 1998-09-10 | Array of thin film actuated mirrors for use in an optical projection system and method for the manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930024397A KR970006693B1 (en) | 1993-11-16 | 1993-11-16 | An optical path regulating apparatus of projection type of image display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950016305A KR950016305A (en) | 1995-06-17 |
| KR970006693B1 true KR970006693B1 (en) | 1997-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019930024397A KR970006693B1 (en) | 1993-11-16 | 1993-11-16 | An optical path regulating apparatus of projection type of image display |
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| KR (1) | KR970006693B1 (en) |
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| KR950016305A (en) | 1995-06-17 |
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