摘要:
A projection apparatus is specified, comprising a light modulator having a light receiving region with a cross-sectional area to be illuminated of the size AM and a maximum acceptance angle a for incident light, and at least one light source by means of which, during its operation, a light cone is produced for illuminating said cross-sectional area of said light receiving region and which comprises a number N of LED chips having a maximum radiation angle β. At least one of the LED chips has a radiation decoupling area of the size AD. The relation 0.7·(AM·sin2(α))/(AD·sin2(β)·n2)≦N≦1.3·(AM·sin2(α))/(AD·sin2(β)·n2) applies, where n is equal to 1 or to the refractive index of a coupling medium with which the LED chips are provided.
摘要翻译:一种投影装置,其特征在于包括一个光调制器,该光调制器具有受光区域,该受光区域具有被照亮的尺寸A M M的横截面积和入射光的最大接收角度α,以及至少一个 光源,在其操作期间,产生用于照亮所述光接收区域的所述横截面区域的光锥并且包括具有最大辐射角β的N个LED芯片。 至少一个LED芯片具有尺寸为A D D D的放射去耦合区域。 (α2)(α))/(A)D 2(S)2((N) (α))/(A)N = 1.3。(A)M u> 适用于其中n等于1或耦合介质的折射率,其中LED 提供芯片。
摘要:
An input device having a first character of a first color, a second character of a second color and an illumination device which produces light of the first color and/or of the second color such that, depending on the illumination of the input device, in a first operating state only the first character of the first color, in a second operating state only the second character of the second color, or in a third operating state both characters appear.
摘要:
Described is an optical waveguide having a main direction of extension, at least one radiation entrance face, and a radiation exit face that extends longitudinally to the main direction of extension, wherein at least one radiation entrance face extends transversely to the main direction of extension, and the at least one radiation entrance face has two convexly curved subregions that are connected to each other by a kink-like or concavely shaped indentation. An optical device formed with such a waveguide is also described, as is a display device.
摘要:
This invention relates to uniform backlighting of surfaces by semiconductor light sources. Various semiconductor light sources are combined into identical illumination groups. These identical illumination groups are arranged so that uniform backlighting of a surface is made possible. For homogeneous color mixing to be achieved, especially at edges, each illumination group in the arrangement has at least one adjacent illumination group in a different orientation.