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1. 发明专利

JP2003329995A Liquid crystal display device 审中-公开
标题翻译：液晶显示装置
公开(公告)号：JP2003329995A
公开(公告)日：2003-11-19
申请号：JP2003062645
申请日：2003-03-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： INAGE HISAO , KONUMA YOSHIHIRO , MATSUDA YUTAKA , DEGUCHI MASAHARU
IPC分类号： G02F1/13 , G02F1/1333 , G02F1/13357 , G03B21/00 , G03B21/16
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal projector which takes the higher efficiency of heat radiation, lower cost, smaller size and remedy against dust of a liquid crystal display element into consideration.
SOLUTION: Sheets of transparent glass having a thickness to hardly permit focusing of dust on a screen are respectively fixed and arranged on the incident surface side and exit surface side of an image display element. The liquid crystal projector which reduces the deterioration of image quality by the dust is made possible and the promotion of the heat radiating effect of the image display element is made possible by using the image display element of such configuration.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种液晶投影仪，其考虑到更高的散热效率，更低的成本，更小的尺寸和对液晶显示元件的灰尘的补救。解决方案：具有难以将灰尘聚焦在屏幕上的厚度的透明玻璃板分别固定并布置在图像显示元件的入射表面侧和出射面侧。通过使用这种结构的图像显示元件，能够降低灰尘对图像质量劣化的液晶投影机成为可能，从而可以促进图像显示元件的散热效果。版权所有（C）2004，JPO

2. 发明专利

JPH11295815A COOLING MECHANISM FOR PROJECTION TYPE DISPLAY DEVICE 失效
公开(公告)号：JPH11295815A
公开(公告)日：1999-10-29
申请号：JP10079098
申请日：1998-04-13
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： IKEDA MUNENORI , TSUBATA FUSAMITSU , INAGE HISAO , TANAKA KEIICHIRO , KONUMA YOSHIHIRO , MORITA TATSUO , YAMADA YUICHI
IPC分类号： G02F1/13 , G03B21/16 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To make the temperature of a lamp being a light source and its related equipment within a usable temperature range even when light output of the lamp is made large by providing a 1st ventilation path connecting between a 1st air sucking fan and a ventilating fan and a 2nd ventilation path directly passing the lamp or a condensing lens. SOLUTION: A lamp holder 55 is equipped with 2nd ventilation holes 62 at a front upper angular part and right and left side surface inclined parts and surrounded by a lamp case 56. The 2nd air sucking fan 43 is arranged at the lower surface part of the case 56, and a front panel 3 equipped with a front surface exhaust hole 3 is arranged at the upper part of the case 56 in a state where its inner surface is positioned in parallel right and left, and the ventilating fan 41 is arranged on the inside thereof. Air (a) sucked by the fan 43 passes through a 3rd vent hole 66, blows and cools the 1st and the 2nd condensing lenses 35 and 36, and further passes through the 1st vent hole 53 of a circular surface mirror 52, blows and cools a lamp main body 50, and is discharged to the outside from the front exhaust hole 6 through the fan 41 as the air (b).

3. 发明专利

JPH11258566A LIGHT SOURCE DEVICE FOR LIQUID CRYSTAL PROJECTOR 失效
公开(公告)号：JPH11258566A
公开(公告)日：1999-09-24
申请号：JP5830198
申请日：1998-03-10
申请人： HITACHI LTD
发明人： KONUMA YOSHIHIRO , HASEBE TATSUMI , DEGUCHI MASAHARU , TSUNODA TAKASHI , MATSUDA YUTAKA , YAMAZAKI FUTOSHI , SHIAKI TAKUYA
IPC分类号： G02F1/13 , G02F1/1335 , G02F1/13357 , G03B21/14
摘要： PROBLEM TO BE SOLVED: To allow a display screen of a liquid crystal panel to be illuminated uniformly as a whole by reducing the number of lenses to be used. SOLUTION: A discharge lamp 1 is installed in the center part on a lamp reflector 2, and a concave reflecting surface 3 is provided with an array of elliptical reflecting surfaces 3a, 3b,.... Moreover, a lens surface 5a of a multi-lens 5 opposing the reflecting surface 3 is provided with an array of convex lens surfaces 7a, 7b,... one-to-one corresponding to the elliptical reflecting surfaces 3a, 3b,..., and the lens surface 5b on the rear side forms a convex lens surface. Here, arbitrary elliptical reflecting surfaces 3a, 3b,... form a part of the elliptical surfaces having their focal points on the convex lens surfaces of the multi-lens 5 corresponding thereto and at a light emiting body 1a of the discharge lamp 1. Luminous fluxes divided on the elliptical reflecting surfaces 3a, 3b... are superimposed on each other through the multi-lens 5 to illuminate a liquid crystal panel 8.

4. 发明专利

JPH11258565A LIQUID CRYSTAL PROJECTOR 失效
公开(公告)号：JPH11258565A
公开(公告)日：1999-09-24
申请号：JP5829198
申请日：1998-03-10
申请人： HITACHI LTD
发明人： KONUMA YOSHIHIRO , IKOMA JUNICHI
IPC分类号： H04N5/74 , G02F1/13 , G03B21/00 , G03B21/16
摘要： PROBLEM TO BE SOLVED: To match projected images accurately with each other on a screen for plural projector main bodies to be used while being piled up. SOLUTION: Two projector main bodies 1a, 1b are piled, and are arranged so as to display the magnified projection images overlapped on a same screen 9. Lens moving mechanisms 5a, 5b in these projector main bodies 1a, 1b move zoom lenses 6a, 6b in the vertical direction to adjust the heights of the images projected on the screen 9, and these projected images are matched with each other in size by adjusting the zoom magnifications of the zoom lenses 6a, 6b. Moreover, it is possible to correct horizontal deviations and tilts of these projected images to the screen 9 by adjusting the legs arranged on the bottom of the projector main bodies 1a, 1b.

5. 发明专利

JPH1062876A OPTICAL DEVICE 失效
公开(公告)号：JPH1062876A
公开(公告)日：1998-03-06
申请号：JP22099896
申请日：1996-08-22
申请人： HITACHI LTD
发明人： FUSE KENJI , KONUMA YOSHIHIRO , NISHIJIMA TATSUMI , MATSUDA YUTAKA , SATO KENJI , NAGAI KIYUUICHIROU
IPC分类号： G03B33/12 , G02F1/13 , H04N5/74 , H04N9/31
摘要： PROBLEM TO BE SOLVED: To obtain an optical device using plural prisms whose cost is low, and whose adjustment operation is easy by providing second and third prism parts capable of respectively moving along the first and second reference surfaces of a first prism part and moving the second or the third prism part along the reference surface, so that the distance of a light beam transmitted through the prism can be varied. SOLUTION: The respective prism parts are interposed between a referential side board 40 and an auxiliary side board 50 in a press-contact condition with each other, and attached to the board 40 in the press-contacting condition. In order to move the second prism part 20 along the board 40, a screw 49a is rotated, first, the part 20 is turned while making the screw 49a a fulcrum so as to have an inclined posture with respect to the board 40(B). Next, the screw 49b is rotated to correct the inclination, so that the prism 1 and the part 20 are in a nearly parallel condition, and the positional adjustment is finished (c) in the case moving amount becomes an aimed distance L2(L2

6. 发明专利

JPH08271848A LIQUID CRYSTAL PROJECTOR 失效
公开(公告)号：JPH08271848A
公开(公告)日：1996-10-18
申请号：JP7113495
申请日：1995-03-29
申请人： HITACHI LTD
发明人： KONUMA YOSHIHIRO , SATO KENJI
IPC分类号： G03B33/12 , G02F1/13
摘要： PURPOSE: To prevent the contrast of a projected image on a screen from getting low by inclining all the total reflection surfaces of a dichroic prism to a direction perpendicular to the optical axis of a projection lens. CONSTITUTION: The total reflection surface 14 of the dichroic prism 5 is a surface adjacent to a plane-convex lens 4 through an air layer, and is inclined to the direction perpendicular to the optical axis 15 of the projection lens 12 by a specified angle. An incident light beam 6 is separated into a red light beam 7R, a green light beam 7G and a blue light beam 7B by the prism 5. The respective light beams 7R, 7G and TB are reflected as a red light beam 9R, a green light beam 9G and a blue light beam 9B by reflection and scattering type liquid crystal panels 8R, 8G and 8B. The respective reflected light beams 9R, 9G and 9B are color-synthesized by the prism 5 and become the emitted light beam 10. A part 13 of the incident light beam is reflected by the total reflection surface 14 for the red light beams 7R and 9R and the unnecessary reflected light beam 16 is not projected on the screen because it is shielded by an aperture diaphragm 11.

7. 发明专利

JPH08122919A PICTURE PROJECTOR 失效
公开(公告)号：JPH08122919A
公开(公告)日：1996-05-17
申请号：JP26486694
申请日：1994-10-28
申请人： HITACHI LTD
发明人： YATSUDA NORIO , KONUMA YOSHIHIRO
IPC分类号： G03B21/60 , G02B5/30 , G02F1/13 , G03B21/10
摘要： PURPOSE: To display a bright video excellent in contrast even in a light environment by forming a reflection type screen from a plurally laminated transparent resin plate or glass plate to prevent the effect of external light. CONSTITUTION: The transparent resin plate 1 constituting the reflection type screen 7 has reflection increasing films 2, 3 on the surface and contains a dispersing agent 5 inside. The resin plate is formed by laminating four pieces with a spacer 4 and having an absorption layer 6 on one surface. In the reflection increasing films 2, 3, the 1st film is a low refraction factor layer 2 and the 2nd film is a high refraction factor layer 3. A polarizing film is provided on a window glass on the input side of external light and the surface of the cover of a room lamp so that the polarization plane is at a right angle to a polarizing plate on the output side of a liquid crystal panel of liquid crystal projector. Most of external light passes through the resin plate 1 and is absorbed by the absorption layer 6, and most of light from the liquid crystal projector is reflected.

8. 发明专利

JPH06308485A DISPLAY DEVICE 失效
公开(公告)号：JPH06308485A
公开(公告)日：1994-11-04
申请号：JP9407293
申请日：1993-04-21
申请人： HITACHI LTD
发明人： YAMAGUCHI TOSHIHIRO , KABUTO NOBUAKI , KONUMA YOSHIHIRO
IPC分类号： G02B5/02 , G02F1/1335 , G02F1/13357
摘要： PURPOSE:To obtain the display device whose brightness is high and which can efficiently utilize light from a light source by making the shapes of plural prisms a pyramid state having one or more slant faces. CONSTITUTION:A conventional back light system constituted of the light source 1 such as a fluorescent tube, etc., a reflection box 2 whose inside surface is a mirror surface or a white surface, etc., and an opal diffusing board 3; and a plate-like prism sheet 401 in which plural quadrangular pyramid prisms are arrayed in a grid-state on one surface on the light source 1 side of a transmission type display panel 5 are arranged, and the flat surface side of the prism sheet 401 is on the diffusing board 3 side. In this case, as to the partially enlarged flat surface and the cross section of the prism sheet 401, the shape of the prism is the quadrangular pyramid state, and the cross section in a right- and-left direction and the cross section in an up-and-down direction are tooth- shaped. The diffused light made incident on the flat surface side of the prism sheet 401 is condensed in a normal direction by the prism sheet. Furthermore, a collecting rate is adjusted by the angle of the prism.

9. 发明专利

JPH05225806A DISPLAY LIGHTING SYSTEM 失效
公开(公告)号：JPH05225806A
公开(公告)日：1993-09-03
申请号：JP2354592
申请日：1992-02-10
申请人： HITACHI LTD
发明人： KONUMA YOSHIHIRO , OISHI SATORU
IPC分类号： F21S2/00 , F21V9/14 , G02B5/30
摘要： PURPOSE:To provide an image having constantly good contrast during indoor illumination regardless of the relative position of a lighting system and a display system by providing a linear polar filter having a vertical polarizing axis on the front of the display system and by providing a linear polar filter in which its polarizing axis crosses at right angles to a straight line run between the front of the display system and an indoor illuminating means on the indoor illuminating means such as a fluorescent lamp. or a window. CONSTITUTION:A fluorescent lamp 3 is provided with a linear polarizing plate 13 in which its polarizing axis 12 crosses at right angles to a straight line run between a screen 2 and the fluorescent lamp 3. This forms the polarizing direction 14 of the illuminating light 10 of the fluorescent lamp 3 and the polarizing axis 6 of the polarizing plate 7 of the screen 2 at right angles each other.

10. 发明专利

JPH05224298A LIQUID CRYSTAL PROJECTOR 失效
公开(公告)号：JPH05224298A
公开(公告)日：1993-09-03
申请号：JP2354692
申请日：1992-02-10
申请人： HITACHI LTD
发明人： OISHI SATORU , KONUMA YOSHIHIRO , MATSUDA YUTAKA
IPC分类号： G02B5/10 , G02F1/13 , G03B21/14 , H04N5/74 , H04N9/30
摘要： PURPOSE:To obtain a video having the excellent quality of a projected picture by improving illuminance on a peripheral part without remarkably lowering the light utilization factor of a light source so that brightness is kept all over the surface in a liquid crystal projector where a picture on a liquid crystal panel is enlarged and projected on a screen. CONSTITUTION:The reflection surface of a condensing reflection mirror 2a for a light source which is used in the liquid crystal projector has an ellipsoidal shape, the light source is positioned at or near the 1st focal point 21 of the ellipse, and 2nd focal points 22a and 22b are set to be two or more. By setting the focal points to be two or more, irradiating light from the light source is dispersed, the illuminance on the periphery is improved, and the brightness is kept all over the surface without remarkably lowering the total light utilization factor in comparison with the conventional condensing reflection mirror using an ellipsoidal shape having a single focal point.

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