Design of the modern on-board equipment for visualization of the air navigation parameters and geodetails (digital district map) is determined by certain requirements to the quality of the visualized information to be displayed. This kind of quality may be characterized quantitatively in terms of brightness and contrast of each color displayed on the screen. In order to ensure a stable readability of an image for a pilot, a special procedure should choose chromaticity of the coordinates of the image elements. This article deals with the designing problem of selection of the optical parameters of the on-board indication equipment based on a liquid crystal panel. Solution to the problem is of practical importance, because at the design stage indication in the documentation introduces the design solutions, which determine the quality and operational characteristics of the future product. The following relevant parameters for designing were defined: nonuniformity of brightness, brightness value, color contrast, brightness contrast, diffuse reflection factor, mirrored reflection factor, and gamut. An algorithm for an automated selection of the parameters, based on the lexicographic evaluation procedure was proposed. A lexicographic evaluation procedure involves ranking of the design parameters by their relative importance and a further search for the optimal value of each parameter, regardless of the other parameters. The expressions for calculation of the estimated parameters were proposed, and a way for the searching procedure to find the best value for each of the parameters was described. The algorithm is based on certain quotient decisive rules, which establish the boundary values for the analyzed parameters. Feedback in the algorithm ensures an iterative way to achieve the best value for each parameter. The results of the research were obtained during implementation of the developmental works and can be used by the developers of the on-board indication equipment to perform circuit calculations.