| 摘要 |
本发明系有关于一种显示萤幕，其包括具有第一类型之光发射的背景网格元件(2)及第二类型之光发射或不透光的背景网格元件(3)的背景网格(1)。就观察者之方向而言设有位于该背景网格(1)上游的前景网格(4)，其具有全透光之前景网格元件(5)及光减弱之前景网格元件(6)。该前景网格(4)与该背景网格(1)间隔某个预设距离且相对于该背景网格(1)以垂直于该距离之某个预设横向位置定向。;为在此种显示萤幕上安全地呈现资讯，该等全透光之前景网格元件(5)与该等光减弱之前景网格元件(6)在该前景网格(4)的至少一前景区域内随机地以约50：50的比例分布。该分布用以作为针对该背景网格(1)之编码的密钥。在至少一对应于该前景区域的背景区域内，该背景网格(1)一基本编码系定义为该等透光与该等光减弱之前景网格元件(5，6)的逆分布，使得光减弱之前景网格元件(6)对应于该第一类型之光发射的背景网格元件(2)，以及，全透光之前景网格元件(5)对应于该第二类型之光发射或不透光的背景网格元件(3)。在至少一定义一资讯且位于该至少一背景区域内的所选区段(7)内，不透光与光发射的背景网格元件(2，3)的分布作为该资讯之相对该基本编码而言的编码至少部分被反转。其中，该等前景网格元件(5，6)之横向尺寸、该前景网格(4)之相对该背景网格(1)而言之距离以及横向位置以某种方式彼此协调，使得由于与该背景网格(1)之作为基本编码之区段存在对比度差别及/或色差，对该前景网格(4)进行观察的观察者仅以某个视向或者以某个与该视向存在最大±50°差异的视角范围对该编码资讯进行解密地感知。本发明亦有关于一种将资讯安全呈现于此种显示萤幕上的方法。;In such a display screen for the secure presentation of information, the completely light-transparent foreground raster elements (5) and the light-attenuating foreground raster elements (6) are, in at least one foreground area of the foreground raster (4), distributed stochastically at a ratio of about 50:50. This distribution serves as a key for encoding the background raster (1). In at least one background area corresponding to the foreground area, a basic encoding of the background raster (1) is defined as an inverted distribution of the light-transparent and light-attenuating foreground raster elements (5,6), so that light-attenuating foreground raster elements (6) correspond to light-radiating background raster elements of the first kind (2), and completely light-transparent foreground raster elements (5) correspond to light-radiating or opaque background raster elements of the second kind (3). In at least one selected region (7), which defines an information and lies in the at least one background area, the distribution of opaque and light-radiating background raster elements (2,3) is at least partially inverted to encode the Information as opposed to the basic encoding. The lateral dimensions of the foreground raster elements (5, 6), the distance and the lateral position of the foreground raster (4) relative to the background raster (1) are matched to each other in such a way that a viewer looking at the foreground raster (4) will, due to a contrast and/or color difference from such areas of the background raster (1) that are basically encoded, perceive the encoded information as decoded only from a viewing direction or from a viewing angle range of up to ± 50° |
