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21. 发明专利

JP2010107998A Image display device and screen for use in the same, and fresnel lens sheet 审中-公开
标题翻译：图像显示装置和用于其中的屏幕以及FRESNEL镜片
公开(公告)号：JP2010107998A
公开(公告)日：2010-05-13
申请号：JP2009296687
申请日：2009-12-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OISHI SATORU , YOSHIKAWA HIROKI , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/62 , G02B5/02 , G02B5/04 , G03B21/10
摘要： PROBLEM TO BE SOLVED: To eliminate unevenness in brightness of a projected image in an image display device configured to obliquely project image-light onto a rear-projection screen and provide an enlarged/projected image.
SOLUTION: The screen on which the image light emitted from an image generation source is projected includes: a Fresnel lens sheet 8; and a lenticular lens sheet. A prism 12 including a refractive surface and a total reflective surface is formed on the incident surface of the Fresnel lens sheet 8. The prism 12 includes, on the light incident surface of the Fresnel lens sheet 8: a first prism 12a including a first total reflective surface and disposed in an area having a light incident angle equal to or more than a predetermined one on the light incident surface of the Fresnel lens sheet 8; and a second prism 12b including a second total reflective surface and disposed in an area having an incident light angle less than the predetermined one. A groove 13 having a V-shaped cross section is formed between the second prisms 12b, the total reflective surface of the second prism 12b is made longer in size than that of the first prism 12a.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了消除图像显示装置中的投射图像的亮度不均匀，该图像显示装置被配置为将图像光倾斜投影到后投影屏幕上并提供放大/投影图像。解决方案：投射从图像发生源发出的图像光的屏幕包括：菲涅耳透镜片8; 和双凸透镜片。在菲涅尔透镜片8的入射表面上形成包括折射表面和全反射表面的棱镜12.棱镜12包括在菲涅耳透镜片8的光入射表面上：第一棱镜12a，其包括第一总数设置在菲涅尔透镜片8的光入射面上具有等于或大于预定值的光入射角的区域; 以及第二棱镜12b，其包括第二全反射表面，并且设置在具有小于预定入射角的入射光角的区域中。在第二棱镜12b之间形成具有V形横截面的槽13，使第二棱镜12b的总反射面的尺寸比第一棱镜12a大。版权所有（C）2010，JPO＆INPIT

22. 发明专利

JP2008129296A Projection type image display apparatus 有权
标题翻译：投影类型图像显示设备
公开(公告)号：JP2008129296A
公开(公告)日：2008-06-05
申请号：JP2006313713
申请日：2006-11-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： UEI YASUTAKA , IMAFUKU DAISUKE , HIRATA KOJI , OGURA NAOYUKI
IPC分类号： G03B21/62
摘要： PROBLEM TO BE SOLVED: To sufficiently reduce warpage and deformation of a screen due to the expansion/contraction of the screen caused by changes in ambient temperature and humidity.
SOLUTION: The screen relating to the present invention is hung down from a screen frame 200 by hanging members 3a, 3b and 3c joined to the upper side of a front sheet 1. Supporting members 4a, 4b and 4c are provided on the lower side of the front sheet 1. By placing the fresnel lens sheet 2 on the members, a vertical tensile force is applied on the front sheet 1 with the weight of the fresnel lens sheet 2. A horizontal tensile force is applied on the front sheet 1. Tensile force apply members 7a and 7c for applying the tensile force in the left and right directions of the screen in accordance with the expansion/contraction of the screen are separately connected to the hanging members 3a and 3c located on the left and right sides of the screen.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了充分减少由于环境温度和湿度的变化引起的屏幕的膨胀/收缩导致的屏幕的翘曲和变形。＆lt;解决方案＆gt;本发明的画面通过与前片1的上侧连接的悬挂构件3a，3b，3c从屏幕框架200挂起。支撑构件4a，4b，4c设置在通过将菲涅耳透镜片2放置在构件上，以菲涅尔透镜片2的重量将正向张力施加到前片1上。在前片上施加水平张力拉伸力施加部件7a和7c根据屏幕的伸缩来施加屏幕左右方向的张力分别连接到位于左侧和右侧的悬挂件3a和3c 的屏幕。版权所有（C）2008，JPO＆INPIT

23. 发明专利

JP2007271843A Projection type image display apparatus 有权
标题翻译：投影类型图像显示设备
公开(公告)号：JP2007271843A
公开(公告)日：2007-10-18
申请号：JP2006096408
申请日：2006-03-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IMAFUKU DAISUKE , HIRATA KOJI , OGURA NAOYUKI
IPC分类号： G03B21/10 , G03B21/62
CPC分类号： G03B21/625
摘要： PROBLEM TO BE SOLVED: To satisfactorily reduce bends and curves in a screen, which result from contraction of the screen caused by changes in ambient temperature and humidity. SOLUTION: The screen is suspended in a screen frame 200 by suspending members 3a, 3b, and 3c joined to the upper part of a front sheet 1. Support members 4a, 4b, and 4c are disposed in the bottom of the front sheet 1. By placing a Fresnel lens sheet 2 on it, vertical tension is applied to the front sheet 1 by the weight of the Fresnesl lens sheet 2. Horizontal tension is applied to the front sheet 1. Long holes 3a1 and 3c1 are formed in the suspending members 3a and 3c so that an amount of horizontal movement of each of the suspending members 3a and 3c on the left and right sides of the screen, resulting from contraction of the screen, is greater than that of the middle suspending member 3b. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：令人满意地减少由于环境温度和湿度的变化引起的屏幕收缩而导致的屏幕弯曲和曲线。解决方案：将屏幕悬挂在屏幕框架200中，悬挂在前片1上部的构件3a，3b和3c。支撑构件4a，4b和4c设置在前面的底部通过在其上放置菲涅尔透镜片2，通过Fresnesl透镜片2的重量将正向张力施加到前片1上。将水平张力施加到前片1.长孔3a1和3c1形成在悬挂构件3a和3c使得由于屏幕收缩而导致的屏幕左侧和右侧的每个悬挂构件3a和3c的水平移动量大于中间悬挂构件3b的水平移动量。版权所有（C）2008，JPO＆INPIT

24. 发明专利

JP2007193290A Image display device and fresnel lens sheet for use therein 审中-公开
标题翻译：图像显示装置和用于其的FRESNEL镜片
公开(公告)号：JP2007193290A
公开(公告)日：2007-08-02
申请号：JP2006058851
申请日：2006-03-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIKAWA HIROKI , HISADA TAKAKI , OISHI SATORU , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/62 , G02B3/08 , G02F1/13 , G02F1/1335
CPC分类号： G03B21/62 , G02B3/08 , G02B5/045 , G02F1/133526 , G03B21/10
摘要： PROBLEM TO BE SOLVED: To eliminate unevenness in lightness of a projection image in an image display device obliquely projecting a picture light on a back projection type screen to obtain a magnified projection picture. SOLUTION: The Fresnel lens sheet (8) is provided with a first prism group (12a) provided on a region of its light incident surface having a prescribed light incident angle or more, and a second prism group (12b) provided on the region of the light incident surface having the angle not more than the prescribed light incident angle. The first prism group (12a) includes a first refractive surface (SK1) refracting the light incident at the prescribed light incident angle or more, and a first total reflection surface (SH1) reflecting the light refracted by the first refractive surface to guide it to an emission side of the Fresnel lens sheet. The second prism group includes a second refractive surface (SK2) refracting the light incident at an angle not more than the prescribed light incident angle to guide it to the emission side of the Fresnel lens sheet, and a second total reflection surface (SH2) reflecting a part of the light refracted by the second refractive surface to guide it to the emission side of the Fresnel lens sheet. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了消除在背投影型屏幕上倾斜投影图像光的图像显示装置中的投影图像的亮度的不均匀性，以获得放大的投影图像。菲涅尔透镜片（8）设置有设置在具有规定的光入射角度以上的光入射面的区域上的第一棱镜组（12a）和设置在其上的第二棱镜组（12b）光入射面的区域具有不大于规定光入射角的角度。第一棱镜组（12a）包括折射以规定的光入射角以上入射的光的第一折射面（SK1）和反射由第一折射面折射的光的第一全反射面（SH1），将其引导到菲涅尔透镜片的发射侧。第二棱镜组包括以不大于规定光入射角的入射光折射的第二折射面（SK2），将其引导到菲涅耳透镜片的发射侧，并且反射第二全反射面（SH2）光的一部分由第二折射表面折射以将其引导到菲涅尔透镜片的发射侧。版权所有（C）2007，JPO＆INPIT

25. 发明专利

JP2007011154A Screen and image display device using the same 审中-公开
标题翻译：使用该图像的画面和图像显示装置
公开(公告)号：JP2007011154A
公开(公告)日：2007-01-18
申请号：JP2005194494
申请日：2005-07-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIKAWA HIROKI , HISADA TAKAKI , OISHI SATORU , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/62 , G02F1/1335 , G03B21/10
CPC分类号： G03B21/10 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To provide a technology suitable for projecting images on a screen brighter while reducing the depth of a device. SOLUTION: The Fresnel lens sheet 31 has the Fresnel center o located near the lower end of the Fresnel lens sheet, and includes a first concentric circular Fresnel lens located inside a reference circle n and a second concentric circular Fresnel lens located outside the reference circle n. The conjugate point distance of the second Fresnel lens is made shorter than that of the first Fresnel lens. The reference circle n is the circle of the Fresnel lens, which passes the vicinities of the intersections of the horizontal center line m vertically bisecting the Fresnel lens sheet 31 and the left end and right end of the Fresnel lens sheet. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供适合于在屏幕上投影图像更加明亮的技术，同时减少设备的深度。菲涅耳透镜片31具有位于菲涅耳透镜片下端附近的菲涅尔中心o，并且包括位于基准圆n内的第一同心圆形菲涅尔透镜和位于外部的基准圆n的第二同心圆形菲涅耳透镜参考圈n。第二菲涅尔透镜的共轭点距离比第一菲涅尔透镜的共轭点距离短。参考圆n是菲涅尔透镜的圆，其通过垂直平分菲涅耳透镜片31的水平中心线m和菲涅尔透镜片的左端和右端的交点附近。版权所有（C）2007，JPO＆INPIT

26. 发明专利

JP2006189526A Image display apparatus, screen and fresnel lens sheet used therefor 审中-公开
标题翻译：图像显示设备，屏幕和FRESNEL镜片
公开(公告)号：JP2006189526A
公开(公告)日：2006-07-20
申请号：JP2005000030
申请日：2005-01-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OISHI SATORU , YOSHIKAWA HIROKI , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/62 , G02B3/08 , G02B5/02 , G02B5/04 , G03B21/10 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To eliminate nonuniformity in the brightness of a projection image within a display image apparatus for obtaining an enlarged projection image, through an oblique projection of image light onto a rear-surface projection-type screen.
SOLUTION: The screen 3, on which the image light is projected from an image generating source 1, is provided with a fresnel lens sheet 8 and a lenticular lens sheet 9. A prism 12, having a refracting surface and the total reflecting surface, is formed on the incident surface of the fresnel lens sheet 8. The prism 12 comprises a 1st prism 12a provided in a zone of the light incident surface of the fresnel lens sheet 8, where a light having incident angle equal to or larger than a prescribed angle enters and including a 1st total reflection surface and a 2nd prism 12b provided in zone of the light incident surface of the Fresnel lens sheet 8, where a light having incident angle smaller than a prescribed angle enters and including a 2nd total reflection surface. The dimension of the total reflection surface of the 2nd prism 12b is made longer than that of the total reflection surface of the 1st prism 12a, by providing grooves 13 with each having a V-shaped cross-section among a plurality of the 2nd prisms 12b.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过将图像光倾斜投影到背面投影型屏幕上，消除用于获得放大的投影图像的显示图像装置内的投影图像的亮度的不均匀性。解决方案：从图像产生源1投影图像光的屏幕3设置有菲涅耳透镜片8和双凸透镜片9.棱镜12具有折射表面和全反射表面形成在菲涅耳透镜片8的入射表面上。棱镜12包括设置在菲涅尔透镜片8的光入射表面的区域中的第一棱镜12a，其中入射角等于或大于规定的角度进入并且包括设置在菲涅尔透镜片8的光入射表面的区域中的第一全反射面和第二棱镜12b，其中具有小于预定角度的入射角的光进入并包括第二全反射面。通过在多个第二棱镜12b之间设置具有V形横截面的槽13，使第二棱镜12b的全反射面的尺寸比第一棱镜12a的全反射面的尺寸长。版权所有（C）2006，JPO＆NCIPI

27. 发明专利

JP2006171483A Screen, fresnel lens used for the same, and image display device using the screen 审中-公开
标题翻译：屏幕，使用其的FRESNEL镜头和使用屏幕的图像显示设备
公开(公告)号：JP2006171483A
公开(公告)日：2006-06-29
申请号：JP2004365259
申请日：2004-12-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIKAWA HIROKI , OISHI SATORU , IMAFUKU DAISUKE , HIRATA KOJI
IPC分类号： G03B21/62 , G02B5/02 , G02B5/04
CPC分类号： G03B21/10 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To provide technology suitable to shorten the depth of an image display device, while obtaining an image of high image quality. SOLUTION: A total reflection prism (10) is provided to the image generation source side of a Fresnel lens sheet (6), in order to reflect and emit incident light toward the center of an optical axis of the Fresnel lens sheet. Meanwhile, a first refractive prism (15) for refracting light having a prescribed angle or smaller of incidence and emitting it, in the direction of the optical axis of the Fresnel lens sheet and second refraction prisms (14 and 21) for converting light reflected toward the center of the optical axis of the Fresnel lens sheet in the direction of the optical axis are provided to the image observation side of the Fresnel lens sheet. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供适合于缩短图像显示装置的深度的技术，同时获得高图像质量的图像。解决方案：向菲涅尔透镜片（6）的图像产生源侧提供全反射棱镜（10），以便朝向菲涅尔透镜片的光轴的中心反射和发射入射光。同时，在菲涅尔透镜片和第二折射棱镜（14和21）的光轴的方向上折射具有规定角度或更小的入射光并发射光的第一折射棱镜（15），用于将朝向菲涅耳透镜片的光轴在光轴方向上的中心设置在菲涅尔透镜片的图像观察侧。版权所有（C）2006，JPO＆NCIPI

28. 发明专利

JP2005077767A Video display device, transmission type screen and fresnel lens sheet used for same, and manufacturing method therefor 有权
标题翻译：视频显示设备，传输类型屏幕和用于其的FRESNEL镜片及其制造方法
公开(公告)号：JP2005077767A
公开(公告)日：2005-03-24
申请号：JP2003308198
申请日：2003-09-01
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIKAWA HIROKI , OISHI SATORU , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G02B3/08 , G02B5/02 , G02B5/04 , G03B21/10 , G03B21/62 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To provide a technique which is suitable for shortening the depth of a video display device and obtaining video of high picture quality (whose decrease in brightness is suppressed) even when the depth is shortened.
SOLUTION: On a video generation source side of a Fresnel lens sheet (6) constituting a back projection type screen, a total reflection type prism part (10) which imparts a specified incidence plane projection angle to an incident light beam by a total reflection phenomenon after a 1st refraction phenomenon is provided within a range wherein the angle of incidence of projection video projected from an optical component to the Fresnel lens sheet is ≥ at least about 40°. On a video observation side of the Fresnel lens sheet, a refraction type prism part (11) is provided which projects, by a 2nd refraction phenomenon, the incident light as a projection light beam of a specified projection angle. Consequently, the problem is solved that, when the center of the optical axis of a projection lens is set in the vicinity of the lower end of the back projection type screen to reduce the depth of the video display device, the angle of of the video light beam incident on the upper right and left ends of the back projection screen becomes too large to make reflection loss of the screen larger.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使在深度缩短时，提供一种适合于缩短视频显示装置的深度并获得高画质（抑制亮度降低）的视频的技术。解决方案：在构成背投式屏幕的菲涅耳透镜片（6）的视频产生源侧，将反射型棱镜部（10）赋予入射光束的规定的入射面投影角，在从光学部件投影到菲涅耳透镜片的投影视频的入射角≥≥40°的范围内，设置第一折射现象之后的全反射现象。在菲涅尔透镜片的视频观察侧，设有折射型棱镜部（11），其通过第二折射现象将入射光作为具有规定投影角度的投射光束而突出。因此，解决了当将投影透镜的光轴的中心设置在背投影型屏幕的下端附近以减小视频显示装置的深度的问题时，视频的角度入射在背投影屏幕的右上端和左端的光束变得太大而不能使屏幕的反射损失更大。版权所有（C）2005，JPO＆NCIPI

29. 发明专利

JP2004271922A Rear projection screen and image display device using same 审中-公开
公开(公告)号：JP2004271922A
公开(公告)日：2004-09-30
申请号：JP2003062640
申请日：2003-03-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIKAWA HIROKI , OISHI SATORU , HIRATA KOJI , NAKAYAMA YOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/10 , G03B21/62 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To reduce image disturbance called a speckle which is easily caused when the effective screen size of an image source is small and the diameter D of a projection lens is small.
SOLUTION: A diffusing material of a lenticular lens is characterized in that the absolute value of the difference from the refractive index of a base material constituting the lenticular lens is ≥0.08 and the mean particle size is ≤10 μm. Consequently, an image display device which hardly causes the speckle is obtained even when an image modulating element such as a reflection or a transmission liquid crystal panel and a display element equipped with a plurality of fine mirrors is used as the image source instead of a projection cathode-ray tube.
COPYRIGHT: (C)2004,JPO&NCIPI

30. 发明专利

JP2002341451A TRANSMISSION TYPE SCREEN AND PROJECTION TYPE IMAGE DISPLAY DEVICE USING THE SCREEN 失效
公开(公告)号：JP2002341451A
公开(公告)日：2002-11-27
申请号：JP2001143174
申请日：2001-05-14
申请人： HITACHI LTD
发明人： INAOKA SHIGERU , MORI SHIGERU , NAKAGAWA KAZUNARI , IMAFUKU DAISUKE , NAKAYAMA YOJI
IPC分类号： G02B3/00 , G02B3/06 , G02B3/08 , G03B21/00 , G03B21/62 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To reduce moire generated by a virtual diagonal group connecting the intersecting points of a vertical lenticular lens and a horizontal lenticular lens and a Fresnel lens in a transmission type screen. SOLUTION: When the pitches of the vertical lenticular lens, the Fresnel lens and the horizontal lenticular lens are respectively set up to Pv , Pf and Ph and Pk =1/ (1/Ph ) +(1/Pv ) } is defined, the decimal places of Pk /Pf is about 0.3 to 0.7 when Pk /Pf >1 and the decimal places of Pf /Pk is about 0.3 to 0.7 when Pf /Pk >1.

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