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1. 发明授权

US06327083B1 Rear projection screen with reduced speckle 有权
标题翻译：背投屏幕减少斑点
公开(公告)号：US06327083B1
公开(公告)日：2001-12-04
申请号：US09685552
申请日：2000-10-10
申请人： Jill F. Goldenberg , Qiang Huang , Johannes C. Van De Ven
发明人： Jill F. Goldenberg , Qiang Huang , Johannes C. Van De Ven
IPC分类号： G03B2156
CPC分类号： G03B21/625
摘要： A rear projection screen which includes a front lenticular surface, a diffusion region behind the lenticular surface, a non-diffusion region behind the diffusion region, and a rear phase grating surface, when used with high magnification projection systems, exhibits reduced speckle when compared to other rear projection screen without such a grating.
摘要翻译：背投影屏幕包括前透镜表面，透镜面后面的扩散区域，扩散区域后面的非扩散区域以及后相位光栅表面，当与高倍率投影系统一起使用时，表现出减少的斑点，当与其他背投屏幕没有这样的光栅。

2. 发明授权

US6046846A Image projection screen having diffuser to spread light 失效
标题翻译：图像投影屏幕具有漫射器以散开光线
公开(公告)号：US6046846A
公开(公告)日：2000-04-04
申请号：US159289
申请日：1998-09-23
申请人： Johannes C. van de Ven
发明人： Johannes C. van de Ven
IPC分类号： G03B21/62 , G03B21/60
CPC分类号： G03B21/625
摘要： A single plate (3) is provided with a first lens structure (7) of longitudinal lenses (9) on one side. A pattern of strips (15) of a light-absorbing material is provided on the other side. The strips (15) extend parallel to the longitudinal lenses (9) in the horizontal direction when the screen is in use. The screen includes a second lens structure (19) and a diffuser on the side with the strip pattern. This vertical lens structure (19) ensures the spread of light in the horizontal direction, while the diffuser ensures the spread of light in the vertical and horizontal directions. The lenses (21) of the second lens structure (19) have a very much larger power than those of the first, horizontal lens structure (7).
摘要翻译：单板（3）在一侧设置有纵向透镜（9）的第一透镜结构（7）。在另一侧设置有光吸收材料的条带（15）的图案。当使用屏幕时，条带（15）在水平方向上平行于纵向透镜（9）延伸。屏幕包括第二透镜结构（19）和具有带状图案的侧面上的扩散器。该垂直透镜结构（19）确保光在水平方向的扩展，而扩散器确保光在垂直和水平方向的扩展。第二透镜结构（19）的透镜（21）具有比第一水平透镜结构（7）的透镜大得多的功率。

3. 发明授权

US5889612A Rear pojection screen 失效
标题翻译：后置投影屏幕
公开(公告)号：US5889612A
公开(公告)日：1999-03-30
申请号：US822959
申请日：1997-03-21
申请人： Johannes C. Van De Ven
发明人： Johannes C. Van De Ven
IPC分类号： G03B21/00 , G03B21/62 , G03H1/20
CPC分类号： G02B5/0252 , G03B21/625
摘要： A rear projection screen is described, which comprises an optically transparent plate, a first surface of which is provided with a structure of juxtaposed cylindrical lenses which extend in a first direction and a second, opposite surface intended to be directed towards an audience space is provided with strips of a light-absorbing material. These strips also extend in the first direction. On the second surface the plate comprises diffusing means which are formed by a single element by means of a hologram, which element diffuses the light simultaneously in the first direction at a first angle and in a second direction, perpendicular to the first direction, at a second angle, the first and the second angle being different from each other.
摘要翻译：描述了一种背投屏幕，其包括光学透明板，其第一表面设置有沿着第一方向延伸的并置的圆柱形透镜的结构和旨在指向观众空间的第二相对表面带有光吸收材料的条带。这些条带也沿第一方向延伸。在第二表面上，板包括通过全息图由单个元件形成的扩散装置，该元件在第一方向上以第一方向在第一方向和第二方向上以垂直于第一方向的方式漫射在一个第二角度，第一角度和第二角度彼此不同。

4. 发明授权

US5760955A Rear projection screen with reduced speckle 失效
公开(公告)号：US5760955A
公开(公告)日：1998-06-02
申请号：US418231
申请日：1995-04-06
申请人： Jill F. Goldenberg , Qiang Huang , Johannes C. Van De Ven
发明人： Jill F. Goldenberg , Qiang Huang , Johannes C. Van De Ven
IPC分类号： G03B21/62 , G03B21/60
CPC分类号： G03B21/625
摘要： A rear projection screen which includes a front lenticular surface, a diffusion region behind the lenticular surface, a non-diffusion region behind the diffusion region, and a rear phase grating surface, when used with high magnification projection systems, exhibits reduced speckle when compared to other rear projection screen without such a grating.

5. 发明授权

US4762393A Rear projection screen and rear projection system provided with such a screen 失效
标题翻译：背投屏幕和背投系统配有这样的屏幕
公开(公告)号：US4762393A
公开(公告)日：1988-08-09
申请号：US36419
申请日：1987-04-09
申请人： Gerrit B. Gerritsen , Leendert Vriens , Johannes C. van de Ven
发明人： Gerrit B. Gerritsen , Leendert Vriens , Johannes C. van de Ven
IPC分类号： G03B21/62 , H04N5/74 , G03B21/60
CPC分类号： G03B21/625
摘要： The vertical viewing angle of a rear projection screen having a large horizontal viewing angle and good color correction due to the special shape of the light dispersing elements provided on the front side of the plate is increased by elements provided on the rear side and extending in a direction perpendicular to the front side elements. The latter are preferably total internal reflection elements, while the former are not. A bulk diffusor may be largely or completely dispensed with.

6. 发明授权

US5005945A Rear projection screen and rear projection system comprising such a screen 失效
标题翻译：背投屏幕和包括这种屏幕的背投系统
公开(公告)号：US5005945A
公开(公告)日：1991-04-09
申请号：US556939
申请日：1990-07-19
申请人： Johannes C. van de Ven
发明人： Johannes C. van de Ven
IPC分类号： G03B21/62 , H04N5/74 , H04N9/31
CPC分类号： G03B21/625
摘要： In a rear projection screen having a large horizontal viewing angle caused by the shape of the first light-spreading elements (51) provided at the front side of the plate (50) the color shift is corrected by providing second light-spreading elements (61) at the rear side of the plate. The second light-spreading elements are aligned approximately parallel to the first light-spreading elements and have a pitch (p) which is considerably smaller than the pitch of the first light-spreading elements. This screen provides a good color correction while the first and the second light-spreading elements are formed in such a way that the screen can be manufactured on an industrial scale without any problem.

7. 发明授权

US4721361A Rear projection image viewing system 失效
标题翻译：背投影像观赏系统
公开(公告)号：US4721361A
公开(公告)日：1988-01-26
申请号：US63739
申请日：1987-06-17
申请人： Johannes C. van de Ven
发明人： Johannes C. van de Ven
IPC分类号： G02B27/18 , G03B21/62 , H04N5/74 , G03B21/60
CPC分类号： G03B21/625
摘要： A rear-projection system by means of which a high brightness and contrast can be obtained in that the projection screen has a maximum transmission for signal light and ambient light. This is achieved by making the surfaces of the projection-screen anti-reflecting as far as possible. A satisfactory contrast is further guaranteed by ensuring that ambient light which has traversed the screen is absorbed in dark layers inside the enclosure. Further steps may be taken in order to prevent ambient light which is incident on the mirror from being reflected back to the screen.
摘要翻译：可以获得具有高亮度和对比度的背投系统，因为投影屏具有用于信号光和环境光的最大透射率。这可以通过使投影屏的表面尽可能地防反射来实现。通过确保穿过屏幕的环境光被外壳内的暗层吸收，进一步保证令人满意的对比度。可以采取进一步的步骤，以防止入射到反射镜上的环境光被反射回到屏幕。

8. 发明授权

US6151162A Rear projection screen 失效
标题翻译：背投屏幕
公开(公告)号：US6151162A
公开(公告)日：2000-11-21
申请号：US210419
申请日：1998-12-11
申请人： Johannes C. Van De Ven
发明人： Johannes C. Van De Ven
IPC分类号： G02B3/08 , G03B21/62 , F03B21/56
CPC分类号： G03B21/625
摘要： A rear projection screen (1) comprising a lenticular structure (5) and a Fresnel structure (4). The Fresnel structure (4) has riser edges (9) and Fresnel facets (7). The Fresnel facets (7) are divided into two parts. The first part (11) encloses an angle .psi. with the plane of the projection screen. The second part (13) is substantially parallel to the plane of the screen. The Fresnel structure (4) and the lenticular structure (5) are fixed to each other at the second parts of the Fresnel structure.
摘要翻译：一种包括透镜结构（5）和菲涅耳结构（4）的背投屏幕（1）。菲涅尔结构（4）具有立管边缘（9）和菲涅耳面（7）。菲涅耳面（7）分为两部分。第一部分（11）包围与投影屏平面的角度psi。第二部分（13）基本上平行于屏幕的平面。菲涅耳结构（4）和透镜结构（5）在菲涅尔结构的第二部分彼此固定。

9. 发明授权

US6147801A Rear projection screen with reduced speckle 失效
标题翻译：背投屏幕减少斑点
公开(公告)号：US6147801A
公开(公告)日：2000-11-14
申请号：US914586
申请日：1997-08-18
申请人： Jill F. Goldenberg , Qiang Huang , Johannes C. Van De Ven
发明人： Jill F. Goldenberg , Qiang Huang , Johannes C. Van De Ven
IPC分类号： G03B21/62 , G03B21/60
CPC分类号： G03B21/625
摘要： A rear projection screen which includes a front lenticular surface, a diffusion region behind the lenticular surface, a non-diffusion region behind the diffusion region, and a rear phase grating surface, when used with high magnification projection systems, exhibits reduced speckle when compared to other rear projection screen without such a grating.
摘要翻译：背投影屏幕包括前透镜表面，透镜面后面的扩散区域，扩散区域后面的非扩散区域以及后相位光栅表面，当与高倍率投影系统一起使用时，表现出减少的斑点，当与其他背投屏幕没有这样的光栅。

10. 发明授权

US4911529A Front projection screen 失效
标题翻译：前投影屏
公开(公告)号：US4911529A
公开(公告)日：1990-03-27
申请号：US289146
申请日：1988-12-23
申请人： Johannes C. Van De Ven
发明人： Johannes C. Van De Ven
IPC分类号： G03B21/60 , H04N9/31
CPC分类号： H04N9/31 , G03B21/602
摘要： A front projection screen comprises a transparent plate, the front and rear sides of which have linear Fresnel structures crossing each other and whose rear side is reflective. The riser facets, termed edges, of at least the rear Fresnel lens structure, are substantially perpendicular to the plane of the plate. Ambient light incident on the screen leaves the screen on the rear side via the edges on the rear side or are absorbed by light absorbing material on the edges. This results in an enhancement of the contrast in the observed picture. Further measures enhancing the contrast are the provision of wedge-shaped indentations in the rear side of the plate.
摘要翻译：前投影屏幕包括透明板，其前侧和后侧具有彼此交叉的线性菲涅尔结构，并且其后侧是反射性的。至少后菲涅耳透镜结构的称为边缘的提升板面大致垂直于板的平面。入射到屏幕上的环境光通过背面的边缘离开屏幕，或者被边缘的吸光材料吸收。这导致观察到的图像中的对比度的增强。增强对比度的进一步措施是在板的后侧提供楔形凹陷。

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