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1. 发明专利

JP2006154719A Image display apparatus, and, fresnel lens sheet and screen to be used therein 有权
标题翻译：图像显示装置，和FRESNEL镜片及其使用的画面
公开(公告)号：JP2006154719A
公开(公告)日：2006-06-15
申请号：JP2005123079
申请日：2005-04-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OISHI SATORU , YOSHIKAWA HIROKI , HISADA TAKAKI , TANITSU MASAHIKO , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/62 , G03B21/10 , G03B21/625
CPC分类号： H04N5/74 , G03B21/10 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To dissolve ununiformity in the brightness of a projection image within a display image apparatus which can obtain an enlarged projection image through the oblique projection of image light onto a rear projection screen.
SOLUTION: In the image display apparatus for projecting an image generated from an image generation source 1 from the rear surface of the rear projection screen 3 through a projection optical system comprising a projection lens 2, curved surface reflection mirrors 4, 5 and a reflection mirror 6 in a housing 7 having narrow depth, the rear projection screen includes a Fresnel lens sheet 8, wherein the prism surface of a Fresnel lens constituting the Fresnel lens sheet is formed in an aspheric configuration, thereby the exit angle of light beams from the screen is made about zero (0) degree almost all over the entire surface thereof. Consequently a projection video having uniform brightness as a whole can be obtained and the thickness of the image display apparatus can be reduced.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过将图像光的倾斜投影到后投影屏幕上可以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：在用于通过包括投影透镜2的投影光学系统投影从图像产生源1产生的图像从背投影屏3的后表面投影的图像显示装置中，弯曲表面反射镜4,5和在具有窄深度的壳体7中的反射镜6，后投影屏幕包括菲涅耳透镜片8，其中构成菲涅耳透镜片的菲涅尔透镜的棱镜表面形成为非球面形状，由此形成光束的出射角从屏幕几乎遍及其整个表面的零（0）度。因此，可以获得整体上具有均匀亮度的投影视频，并且可以减小图像显示装置的厚度。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2005258382A Screen, fresnel lens sheet used for same, and image display apparatus using same 有权
标题翻译：屏幕，用于相同的FRESNEL镜片，以及使用其的图像显示装置
公开(公告)号：JP2005258382A
公开(公告)日：2005-09-22
申请号：JP2004187229
申请日：2004-06-25
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 , G02B5/04 , G03B21/62 , G03B21/625
CPC分类号： G03B21/625
摘要： PROBLEM TO BE SOLVED: To overcome the problem in which the reflection loss of a screen becomes large as the angle of screen incidence of video light incident on right and left upper ends of a transmissive screen becomes excessive when the center of the optical axis of a projection lens is set nearby the lower end of the transmissive screen to reduce the depth of an image display apparatus.
SOLUTION: At the image generation source side of the Fresnel lens sheet (6), a totally reflective prism section (10) that totally reflects incident rays of light and causes the light to exit toward the image-watching side is provided within a range wherein the the angle of incidence of projection video projected from an optical component to the Fresnel lens sheet is nearly ≥40°. At the image-watching side of the Fresnel lens sheet (6), a refractive prism section (11) that refracts the light entering from the totally reflective prism section (10) and causes the light to exit toward the image-watching side is provided within a range including a region facing an area where the totally reflective prism +(10) is not provided. The refractive prism section (11) has a roughed refractive face.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了克服当光学器件的中心处于入射到透射屏幕的右上和左上端的视频光的入射角变得过大时屏幕的反射损失变大的问题投影透镜的轴线设置在透射屏幕的下端附近，以减小图像显示装置的深度。解决方案：在菲涅尔透镜片（6）的图像生成源侧，设置全反射棱镜部（10），其全部反射入射光并使光向摄像侧离开，其中从光学部件投影到菲涅尔透镜片的投影视频的入射角近似≥40°的范围。在菲涅尔透镜片（6）的图像观看侧，设置折射从全反射棱镜部（10）入射的光并使光向摄像侧出射的折射棱镜部（11）在包括不设置全反射棱镜+（10）的区域的区域的范围内。折射棱镜部分（11）具有粗糙的折射面。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2012053468A 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：JP2012053468A
公开(公告)日：2012-03-15
申请号：JP2011204071
申请日：2011-09-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IMAFUKU DAISUKE , HISADA TAKAKI , YOSHIKAWA HIROKI
IPC分类号： G03B21/14 , G02B13/00 , G02B13/18 , G02B17/08
摘要： PROBLEM TO BE SOLVED: To provide technique for protecting an optical component from dust in the air while suppressing degradation in image quality.SOLUTION: Both ends of a transparent cover 24 which is a curvature-form member, are attached to a lens flange 26 and a mirror flange 28. Thus, a free-form surface mirror 18 and free-form surface lens are housed in sealed space formed in a projection type image display apparatus.
摘要翻译：要解决的问题：提供保护光学部件免受空气中灰尘的技术，同时抑制图像质量的降低。
解决方案：作为曲率形状构件的透明盖24的两端附接到透镜凸缘26和反射镜凸缘28.因此，容纳自由曲面镜18和自由曲面透镜在形成在投影型图像显示装置中的密封空间中。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2006138988A Image display apparatus, transmission type screen and fresnel lens sheet used for the same 审中-公开
标题翻译：图像显示装置，传输类型屏幕和用于其的FRESNEL镜片
公开(公告)号：JP2006138988A
公开(公告)日：2006-06-01
申请号：JP2004327518
申请日：2004-11-11
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： G03B21/62 , G02B3/08 , G03B21/10
摘要： PROBLEM TO BE SOLVED: To provide an image display apparatus capable of attaining the thickness reduction of the apparatus (hereinafter, refer to as a set), the cost reduction and the weight reduction of the set without the installation of a super large fresnel lens, and to provide a transmission type screen and a fresnel lens sheet.
SOLUTION: Regarding the image display apparatus for enlarging and projecting an image from an image forming source 1 on a transmission type screen 3 through optical components including a projection lens 2, the apparatus is provided with a reflection mirror between the optical components and the transmission type screen, and also, the optical components constitutes a projection optical system for obliquely projecting the eccentric light of the image, and the transmission type screen is provided with an eccentric fresnel lens sheet 8 for converting the projection light to parallel light whose direction is nearly fixed oblique, and a prism sheet 9 for converting the parallel light in the oblique direction to parallel light which exits in a direction nearly vertical to the screen surface, and the rectangular eccentric fresnel lens sheet has small eccentricity in the center of the lens, and the large-sized sheet of 80 inches can be also manufactured by using the existing production equipment.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供能够实现装置的厚度减小的图像显示装置（以下称为一组），不需要设置超大的成本降低和重量减轻菲涅尔透镜，并提供透射型屏幕和菲涅耳透镜片。解决方案：关于通过包括投影透镜2的光学部件在透射型屏幕3上从图像形成源1放大和投影图像的图像显示装置，该装置在光学部件和光学部件之间设置有反射镜透射型屏幕，以及光学部件构成用于倾斜投影图像的偏心光的投影光学系统，透射型屏幕设置有偏心菲涅耳透镜片8，用于将投影光转换成平行光，其方向倾斜近似固定的棱镜片9和用于将平行光沿倾斜方向转换成与屏幕表面几乎垂直的方向退出的平行光的棱镜片9，并且矩形偏心菲涅耳透镜片在透镜中心偏心小并且也可以通过使用现有的生产线等制造80英寸的大尺寸片材 pment。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2006017973A Screen, fresnel lens sheet used in same, and image display device using same 有权
标题翻译：屏幕，使用的FRESNEL镜片和使用相同的图像显示装置
公开(公告)号：JP2006017973A
公开(公告)日：2006-01-19
申请号：JP2004195130
申请日：2004-07-01
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： G02B3/00 , G02B3/08 , G02B5/02 , G03B21/62 , G03B21/625
CPC分类号： G02B3/005 , G02B3/08 , G02B5/0231 , G02B5/0242 , G02B5/0278 , G02B5/045 , G03B21/10 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To obtain bright images in a peripheral area by reducing reflection loss of a screen in the case where the incident angle of image light entering the left and right upper edges of a transmission type screen is large.
SOLUTION: A Fresnel lens sheet (6) includes an incident face prism (10) on the image generation source side and in the area where the incident angle of incident light is almost 40° or more. The incident face prism (10) has an incident face (c) which at least the incident light enters: an emission face (d) with which light entering the incident face is refracted and emitted; and a refracting face (e) with which light emitted from the emission face is refracted and guided 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：为了在进入发送型屏幕的左右上缘的图像光的入射角大的情况下减少屏幕的反射损失，在周边区域中获得明亮的图像。解决方案：菲涅耳透镜片（6）在图像产生源侧和入射光入射角几乎为40°以上的区域中包括入射面棱镜（10）。入射面棱镜（10）具有至少入射光入射的入射面（c）：射入入射面的光被折射发射的射出面（d）以及折射面（e），使从发射面发射的光折射并引导到菲涅尔透镜片的图像观察侧。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JP2005345839A Screen, fresnel lens used for the same, and image display apparatus using the screen 有权
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：JP2005345839A
公开(公告)日：2005-12-15
申请号：JP2004166549
申请日：2004-06-04
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： G03B21/10 , G03B21/62
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 apparatus while obtaining an image of high image quality. SOLUTION: On the image forming source side of a fresnel lens sheet (6), a total reflecting prism part (10) is arranged in a range where the incident angle of a projection image projected from an optical component on the fresnel lens sheet becomes ≥ about 40°, further, on the image viewing side of the fresnel lens sheet, a refraction type prism part (11) is arranged in a range including an area facing an area where the total reflecting prism part is not arranged. The refraction type prism part (11) includes a refraction surface (e) for refracting the incident light and emitting the light toward the image viewing side, a plane (f) nearly parallel to the principle plane of the fresnel lens sheet and a connection plane (g) for continuously forming the planes (e) and (f). COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供适于在获得高图像质量的图像的同时缩短图像显示装置的深度的技术。解决方案：在菲涅尔透镜片（6）的图像形成源侧，将全反射棱镜部（10）布置在从菲涅耳透镜上的光学部件投射的投影图像的入射角此外，在菲涅尔透镜片的图像观察侧，片材变得≥40°，折射型棱镜部件（11）被布置在包括面向不设置全反射棱镜部分的区域的区域中。折射型棱镜部分（11）包括用于折射入射光并朝向图像观看侧发射光的折射面（e），几乎平行于菲涅尔透镜片的主平面的平面（f）和连接平面（g）用于连续地形成平面（e）和（f）。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2003029345A Transmission type screen and back projection image display using the same 有权
标题翻译：传输类型屏幕和使用相同的背投影图像显示
公开(公告)号：JP2003029345A
公开(公告)日：2003-01-29
申请号：JP2001217809
申请日：2001-07-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： INAOKA SHIGERU , NAKAYAMA YOJI , NAKAGAWA KAZUNARI , IMAFUKU DAISUKE
IPC分类号： G02B3/00 , G02B3/08 , G03B21/00 , G03B21/10 , G03B21/14 , G03B21/62
摘要： PROBLEM TO BE SOLVED: To reduce a focus unsharpness of at least a transmission screen used for projection image display.
SOLUTION: The transmission screen 3 used for projection image display is constituted by arranging a plurality of convex lenses 4 each having a spherical surface or aspherical surface shape on a light incident surface and arranging a Fresnel lens 5 at a light exit surface, to form the transmission type screen 4 of single sheet constitution. The inside of the screen 3 or the front surface of the Fresnel lens 5 is provided with a light absorption layer 6 exclusive of light transmission range segments 7.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：减少至少用于投影图像显示的传输屏幕的聚焦不清晰度。解决方案：用于投影图像显示的透射屏幕3通过在光入射面上布置多个具有球面或非球面形状的凸透镜而构成，并将菲涅尔透镜5布置在光出射面处，形成单张纸张传输型屏幕4。屏幕3的内部或菲涅尔透镜5的前表面设置有不包括光传输范围段7的光吸收层6。

8. 发明专利

JP2011175293A Image display apparatus, and fresnel lens sheet and screen used for the image display apparatus 有权
标题翻译：图像显示装置和用于图像显示装置的FRESNEL镜片和屏幕
公开(公告)号：JP2011175293A
公开(公告)日：2011-09-08
申请号：JP2011114310
申请日：2011-05-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OISHI SATORU , YOSHIKAWA HIROKI , HISADA TAKAKI , TANITSU MASAHIKO , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/10 , G02B3/08 , G02F1/13 , G03B21/14 , G03B21/62
摘要： PROBLEM TO BE SOLVED: To dissolve the unevenness of the brightness of a projection image in an image display apparatus, obtaining an enlarged projection image by an oblique projection of image light onto a rear-surface projection type screen.
SOLUTION: In the image display apparatus, an image from an image generating source 1 is projected through a projection optical system including a projection lens 2, curved surface reflection mirrors 4 and 5, and a reflection mirror 6, from a rear surface of the rear-surface projection type screen 3, within a housing 7 being narrow in depth thereof, In the image display apparatus, the rear-surface projection type screen includes a Fresnel lens sheet 8, and the prism surfaces of the Fresnel lens constituting the Fresnel lens sheet are formed in an aspheric configuration. Thereby, an exit angle of the light beams from the screen is made to be about 0°, almost all over the surface of the screen. Thereby, it is possible to obtain a projection image, which is uniform in brightness as a whole, and it is possible to thin the image display apparatus.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了将图像显示装置中的投影图像的亮度的不均匀性消除，通过将图像光的倾斜投影获得放大的投影图像到背面投影型屏幕上。解决方案：在图像显示装置中，来自图像生成源1的图像通过包括投影透镜2的投影光学系统，弯曲表面反射镜4和5以及反射镜6从背面投影在背面投影型屏幕3的深度较窄的壳体7内，在图像显示装置中，背面投影型屏幕包括菲涅尔透镜片8，并且菲涅尔透镜的棱镜面构成菲涅尔透镜片形成为非球面形状。因此，来自屏幕的光束的出射角被制成大约0°，几乎遍及屏幕的整个表面。由此，可以获得整体上的亮度均匀的投影图像，并且可以使图像显示装置变薄。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JP2007328130A 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：JP2007328130A
公开(公告)日：2007-12-20
申请号：JP2006159233
申请日：2006-06-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IMAFUKU DAISUKE , HISADA TAKAKI , YOSHIKAWA HIROKI
IPC分类号： G03B21/10 , G03B21/14 , G03B21/28
CPC分类号： G02B5/08 , G03B21/10 , G03B21/147 , G03B21/28 , H04N9/3141
摘要： PROBLEM TO BE SOLVED: To provide a technique for protecting an optical component from dust in the air while restraining degradation in image quality. SOLUTION: Both ends of a transparent cover 24 which is a curved member, are attached to a lens flange 26 and a mirror flange 28. Thus, a free curved mirror 18 and free curved lens 22 are housed in the sealed space formed in a projection type image display apparatus 1. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种保护光学部件免受空气中灰尘的技术，同时抑制图像质量的降低。解决方案：作为弯曲构件的透明盖24的两端附接到透镜凸缘26和反射镜凸缘28.因此，自由曲面镜18和自由曲面透镜22容纳在形成的密封空间中在投影型图像显示装置1中。（C）2008，JPO＆INPIT

10. 发明专利

JP2007316124A Front projection type screen 有权
标题翻译：前投影类型屏幕
公开(公告)号：JP2007316124A
公开(公告)日：2007-12-06
申请号：JP2006142607
申请日：2006-05-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IMAFUKU DAISUKE , YOSHIKAWA HIROKI
IPC分类号： G03B21/60 , G03B21/00 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To solve the problem wherein when an image on an image display element is obliquely projected to a front projection type screen, horizontal or vertical diffusion cannot suitably be controlled when the reflection characteristic of a front projection type screen is isotropic.
SOLUTION: An incident face is formed flat. An emission face has a plurality of wedge-like grooves formed parallel or concentric around a point intersecting the center of the optical axis of an image projection device. A reflecting agent is applied to flat parts between grooves so as to form reflecting faces. Each reflecting face is given an angle so that when incident light is totally reflected by the bottom face of each groove and then reflected by the reflecting face, an arbitrary point from the front projection screen has a conjugate point.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题为了解决当将图像显示元件上的图像倾斜地投影到前投影型屏幕时，当前投影型屏幕的反射特性为各向同性的。
解决方案：入射面形成平坦。发射面具有与图像投影装置的光轴的中心相交的点平行或同心地形成的多个楔形槽。将反射剂施加到槽之间的平坦部分，以形成反射面。每个反射面被赋予一个角度，使得当入射光被每个凹槽的底面完全反射然后被反射面反射时，来自前投影屏的任意点具有共轭点。版权所有（C）2008，JPO＆INPIT

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