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    REAR-PROJECTION SCREEN AND PROCESS FOR ITS PRODUCTION
    3.
    发明申请
    REAR-PROJECTION SCREEN AND PROCESS FOR ITS PRODUCTION 失效
    后投影屏幕及其生产过程

    公开(公告)号：US20060018015A2

    公开(公告)日：2006-01-26

    申请号：US10495428

    申请日：2004-05-21

    申请人： Markus PARUSEL ,  Jann SCHMIDT ,  Herbert GROOTHUES ,  Wolfgang SCHARNKE ,  Hans LORENZ ,  Helmut HAERING ,  Guenther DICKHAUT-BAYER

    发明人： Markus PARUSEL ,  Jann SCHMIDT ,  Herbert GROOTHUES ,  Wolfgang SCHARNKE ,  Hans LORENZ ,  Helmut HAERING ,  Guenther DICKHAUT-BAYER

    IPC分类号： G03B21/60

    CPC分类号： G03B21/62

    摘要： Abstract of the DisclosureThe present invention relates to rear-projection screens encompassing at least one light-scattering polymethyl methacrylate layer of thickness in the range from 0.05 to 4 mm comprising spherical particles whose size is in the range from 5 to 35 µm, at a concentration in the range from 2 to 60% by weight, based on the total weight of the light-scattering polymethyl methacrylate layer, the refractive index of the spherical plastics particles differing from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, wherein the concentration of the spherical plastics particles cP, the thickness of the light-scattering polymethyl methacrylate layer dS, and the size of the spherical plastics particles DP is selected in such a way that the ratio cP*dS/DP3 is in the range from 0.0015 to 0.015% by weight*mm/µm3 and the ratio of average surface roughness of the polymethyl methacrylate layer Ra to the size of the spherical plastics particles Dp is in the range from 0.05 to 0.4. A feature of the rear-projection screens is particularly high quality of the images projected onto the screens.

    摘要翻译： 发明内容本发明涉及背投屏幕，其包括厚度在0.05至4mm范围内的至少一个光散射聚甲基丙烯酸甲酯层，其包含尺寸在5至35μm范围内的球形颗粒， 浓度在2至60重量％的范围内，基于光散射聚甲基丙烯酸甲酯层的总重量，不同于聚甲基丙烯酸甲酯基质的球形塑料颗粒的折射率为0.02 至0.2，其中球形塑料颗粒的浓度为P，光散射聚甲基丙烯酸甲酯层的厚度d S和球形塑料颗粒D的尺寸 以这样的方式选择P ，使得比值P 3 在0.0015至0.015重量％* mm /μm3范围内，平均表面粗糙度 的聚甲基丙烯酸甲酯层R a a与球形塑料颗粒D P的尺寸在0.05至0.4的范围内。 背投屏幕的特征是投影到屏幕上的图像质量特别高。

    LIGHT GUIDE PLATE AND METHOD FOR THE PRODUCTION THEREOF
    4.
    发明申请
    LIGHT GUIDE PLATE AND METHOD FOR THE PRODUCTION THEREOF 审中-公开
    光导板及其生产方法

    公开(公告)号：US20160170128A1

    公开(公告)日：2016-06-16

    申请号：US14906961

    申请日：2014-07-03

    申请人： Herbert GROOTHUES ,  Jann SCHMIDT ,  Wangelis KARAMPOUGIOUKIS ,  Helmut HÄRING ,  Stephan MEUMAYER ,  Berthold SCHÖNIG ,  EVONIK RÖHN GMBH

    发明人： Herbert GROOTHUES ,  Jann SCHMIDT ,  Wangelis KARAMPOUGIOUKIS ,  Stephan NEUMAYER ,  Helmut HAERING ,  Berthold SCHOENIG

    IPC分类号： F21V8/00

    CPC分类号： G02B6/0055 ,  G02B6/0043 ,  G02B6/0061 ,  G02B6/0065

    摘要： The present invention relates to novel light guide plates composed of a reflector film, of a transparent sheet and of, situated between these, reactive hot-melts or colourless thermoplastics applied by structured printing. No fixed direct connection exists here between the reflector film and the transparent sheet.Light guide plates, e.g. in backlight units (BLUs) or in light panels, have maximum uniformity of thickness and are composed of colourless transparent materials. Light is input here by way of example from LED or CCFL light sources by way of one or more edges of the light guide plate. On at least one surface of the light guide plate there is a structure which scatters the light. When a light beam is incident on the said structure, it is scattered at an angle smaller than the angle of total reflection, and is thus emitted from the plate. The light is emitted at both sides of the plate, and on one side there is therefore mostly a white reflector film which is not in optical contact with the plate. With this structure, the light is emitted only on one of the sides.

    摘要翻译： 本发明涉及由透明片材的反射膜和位于其间的反应性热熔体或通过结构印刷施加的无色热塑性塑料构成的新型导光板。 反射膜和透明片之间不存在固定的直接连接。 导光板，例如 在背光单元（BLU）或浅色面板中，具有最大的厚度均匀性，并且由无色透明材料组成。 通过例如通过导光板的一个或多个边缘的LED或CCFL光源来输入光。 在导光板的至少一个表面上存在散射光的结构。 当光束入射到所述结构上时，以比全反射角度小的角度散射，从而从板发射。 光在板的两侧发射，因此一方面主要是与板不光学接触的白色反射膜。 利用这种结构，光仅在其中一侧发射。