Light panel with enlarged viewing window

本发明涉及光板(12)，包括具有限定观察窗(11)的前表面、背表面和在前表面和背表面之间的侧面(3、4)的光导；至少两种类型的光源(8、9、10)的图案化阵列，这些类型通过由所述至少两种类型的光源发出的光的颜色来区分，所述阵列沿至少其中一个侧面排列。每个光源产生一种颜色的发散光束到光板，以便组合地使光板着色。此外，该阵列包括沿至少其中两个侧面的光源的互补子阵列(8、9、8、9&9、10、9、10)。由于子阵列是互补的，如同现有技术中的单阵列配置(相同数量的光源)，由所有不同类型的光源发出相同光量到光导，但是来自两个或更多侧面，同时保持通常的光源间距，可以降低在其中一种类型光源之间的间距或平均距离。于是降低了所要求的用于颜色混合的距离或颜色，并扩大了观察窗。 The invention relates to a light panel ( 12 ), comprising: a light guide having a front surface defining a viewing window ( 11 ), a back surface and sides ( 3, 4 ) between the front and back surfaces; and a patterned array of light sources ( 8, 9, 10 ) of at least two types, which types are distinguished by the color of light emitted by the light sources of said at least two types, said array being arranged along at least one of the sides. Each light source generates in use a divergent light beam of a color into the panel to, in combination, color the panel. Further, the array comprises complementary sub-arrays ( 8, 9, 8, 9 & 9, 10, 9, 10 ) of light sources along at least two of the sides. Since the sub-arrays are complementary, in that by all light sources of the different types the same amount of light is emitted into the light guide as in prior art single array configurations (the same number of light sources), but from two or more sides while maintaining the general light source pitch, the average distance or pitch between light sources of one of the types, can be decreased. Therewith also the required distance or colors for color mixing is lessened and the viewing window is enlarged.