会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 15. 发明申请
    • HIGH CONTRAST PROJECTION SCREEN
    • 高对比度投影屏
    • WO2013095967A1
    • 2013-06-27
    • PCT/US2012/068723
    • 2012-12-10
    • 3M INNOVATIVE PROPERTIES COMPANYLIU, YufengLONCAR, Francis V. Jr.KOCH, David J.
    • LIU, YufengLONCAR, Francis V. Jr.KOCH, David J.
    • G03B21/56G03B21/60
    • G03B21/56G03B21/60
    • The present disclosure describes a front projection system. The front projection system includes a light absorbing layer having an absorbance in a visible range of the electromagnetic spectrum of at least 80% and a light diffusing layer disposed on the light absorbing layer between the light absorbing layer and the projector. The light diffusing layer includes a plurality of metal flakes uniformly distributed in a host material, an average size of the plurality of metal flakes being in a range from about 0.5 microns to about 20 microns, at concentration of in a range from about 3% to about 30% by weight. A plurality of light absorbing particles uniformly distributed in the host material at a concentration of less than about 7% by weight, and a major front surface facing the projector having an average surface roughness in a range from about 0.5 microns to about 10 microns.
    • 本公开描述了一种前投影系统。 前投影系统包括具有至少80%的电磁光谱的可见范围内的吸光度的光吸收层和设置在光吸收层和投影仪之间的光吸收层上的光漫射层。 光漫射层包括均匀分布在主体材料中的多个金属薄片,多个金属薄片的平均尺寸在约0.5微米至约20微米的范围内,浓度范围为约3%至约20微米 约30重量%。 多个光吸收颗粒以小于约7重量%的浓度均匀分布在主体材料中,并且面向投影仪的主要前表面的平均表面粗糙度在约0.5微米至约10微米的范围内。
    • 16. 发明申请
    • FRONT PROJECTION SCREEN WITH HIGH CONTRAST
    • 具有高对比度的前投影屏幕
    • WO2011063236A1
    • 2011-05-26
    • PCT/US2010/057431
    • 2010-11-19
    • 3M INNOVATIVE PROPERTIES COMPANYLIU, YufengYUST, David T.
    • LIU, YufengYUST, David T.
    • G03B21/56
    • G03B21/56
    • A light diffusing optical construction is disclosed. The optical construction includes a symmetric optical diffuser that scatters light in a first direction with a first viewing angle A H and in a second direction orthogonal to the first direction with a second viewing angle A V , where A V is substantially equal to A H . The symmetric optical diffuser includes an optically transparent first layer and a plurality of randomly arranged optically transparent beads partially embedded in the first layer leaving portions of the beads exposed. The optical construction also includes a specular reflector that reflects light that is not scattered by the symmetric optical diffuser. The specular reflector has a first average reflectance R o in the visible at zero incident angle and a second average reflectance R 60 in the visible at 60 degree incident angle. R o /R 60 is at least about 1.5. The optical construction also includes a light absorbing layer that absorbs light that is not reflected by the specular reflector.
    • 公开了一种光散射光学结构。 光学结构包括对称光学漫射器,其以第一视角AH在第一方向上散射光,并且在与第一方向正交的第二方向上具有第二视角AV,其中AV基本上等于AH。 对称光学漫射器包括光学透明的第一层和多个随机布置的光学透明珠,其部分地嵌入第一层中,留下珠的一部分露出。 光学结构还包括反射不被对称光漫射器散射的光的镜面反射器。 镜面反射体在零入射角可见中具有第一平均反射率Ro,在60度入射角处具有可见的第二平均反射率R60。 Ro / R60至少约为1.5。 光学结构还包括吸收未被镜面反射体反射的光的光吸收层。
    • 18. 发明申请
    • POLARIZATION SENSITIVE FRONT PROJECTION SCREEN
    • 极化敏感前投影屏幕
    • WO2011062822A1
    • 2011-05-26
    • PCT/US2010/056175
    • 2010-11-10
    • 3M INNOVATIVE PROPERTIES COMPANYWEBER, Michael F.LIU, YufengNEVITT, Timothy J.
    • WEBER, Michael F.LIU, YufengNEVITT, Timothy J.
    • G03B21/60G02B5/30
    • G03B21/604
    • A projection system is disclosed, in which a screen may have improved rejection of ambient light by having a high reflectivity at low angles of incidence for a polarization parallel to that of the projector, a low reflectivity at high angles of incidence for a polarization parallel to that of the projector, and a low reflectivity at both low and high angles of incidence for a polarization perpendicular to that of the projector. In some embodiments, for p-polarized light polarized parallel to the projector, the power reflectivity is high at low angles of incidence and decreases to a low value at high angles of incidence. In some embodiments, for p-polarized light polarized perpendicular to the projector, the power reflectivity is low at low angles of incidence. In some embodiments, for s-polarized light polarized perpendicular to the projector, the power reflectivity remains low at all angles of incidence. In some embodiments, the screen includes a thin film structure that has alternating quarter-wave layers of isotropic and birefringent materials, which are refractive-index-matched for light polarized perpendicular to the projector, which form a high reflector at normal incidence for light polarized parallel to the projector, and which exhibit Brewster's angle effects for p-polarized light polarized parallel to the projector at high angles of incidence. The Brewster's angle effect may be reached by use of a light-scattering layer that increases the effective incident refractive index.
    • 公开了一种投影系统,其中屏幕可以通过在平行于投影仪的偏振的低入射角具有高反射率而具有改善的环境光的抑制,在与入射角平行的偏振的高入射角处的低反射率 投影仪的偏振角以及垂直于投影仪的偏振的低和高入射角的低反射率。 在一些实施例中,对于平行于投影仪偏振的p偏振光,在低入射角下的功率反射率高,并且在高入射角下降低到低值。 在一些实施例中,对于垂直于投影仪偏振的p偏振光,功率反射率在低入射角下较低。 在一些实施例中,对于垂直于投影仪偏振的s偏振光,功率反射率在所有入射角保持较低。 在一些实施例中,屏幕包括薄膜结构,其具有交替的各向同性和双折射材料的四分之一波长层,其对于垂直于投影仪偏振的光进行折射率匹配,其在垂直入射时形成用于光偏振的正反射器 平行于投影仪,并且以高入射角度平行于投影仪偏振的p偏振光表现出布鲁斯特的角度效应。 布鲁斯特的角度效应可以通过使用增加有效入射折射率的光散射层达到。