Estimation of the louvers influence on LED video display image visibility

Sun and ambient light is a serious problem for outdoor LED video displays. Shading the front-face surface by louvers implementation is used in majority of LED displays, but louvers influence the LED directivity. The analytical method is developed for image visibility estimation. The louver geometry and position are taken into account. LED FFP goniometry is used for large LED batch and results later averaged. The averaged FFP is then approximated by Gaussian analytical function. Obtained function can be used to calculate the visibility of display image at various viewing distances.