| 摘要 |
An assembly backlighting a liquid crystal flat panel display or other such arrangement requiring backlighting is disclosed herein. The assembly includes a plurality of light pipes (10, 12) and is capable of a multi-mode operation as well as achieving an enhanced dimming. This assembly is composed of two or more light pipes (10, 12) placed in a stacked configuration. Each light pipe has a set of specially configured microprisms (32, 32') which, cooperating with the light pipes (10, 12), provides an efficient backlighting technique with a controllable degree of collimation. The disclosed assembly is particularly useful for displays which require a very bright backlighting, a wide dimming range and which must be capable of illuminating a given active area with light of different spectra.
|
