TUO Chang-fu,LÜ Guo-qiang,XU Li-ye,et al.Design of micro-structure film for improving viewing brightness of vehicle head-up display[J].Optics and Precision Engineering,2021,29(08):1822-1831.
TUO Chang-fu,LÜ Guo-qiang,XU Li-ye,et al.Design of micro-structure film for improving viewing brightness of vehicle head-up display[J].Optics and Precision Engineering,2021,29(08):1822-1831. DOI: 10.37188/OPE.20212908.1822.
Design of micro-structure film for improving viewing brightness of vehicle head-up display
Vehicle head-up displays can directly display information required by a driver to view the direction of the driver's sight line as a virtual image, which effectively reduces traffic accidents caused by sight deviation from the driving direction. Current head up display products have some virtual images outside the eyebox area, which leads to problems of low brightness in this area and low light efficiency of the system. We take the scattering angle of single row pixels in the source image as the design unit and design an optical microstructure film to control the direction of the projection light, so that the projection light is more concentrated in the eyebox area. The test results indicate that the average brightness of the eyebox area increased by 31.7%. This method can effectively improve the viewing brightness and system lighting efficiency of the head up display and reduce both light pollution in a cab and the stray light outside the eyebox area.
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