A liquid crystal display has a plurality of pixels arranged in a matrix to be formed on a transparent insulating substrate. Modified forms of invention are specifically designed for cutter blades which are intended to perform reaming operations but include the fluid delivery system as well as an extended delivery system for delivering fluid under pressure to other tools in the drill string. Overlapping areas of the kernels are displayed in different colors than corresponding non-overlapping areas. The MEMS mirror can also be tilted to shift wavelengths of the wavelength channels of the arrayed waveguide grating by pre-defined amounts upon receiving a corresponding remote command.