Patent attributes
An electronic ruler has a generally rectangular-solid shape defining a length, width, and thickness. A straight edge exists along the length as do distance markings in at least one unit of measurement. A user input interface 1) receives user inputs of measurement in a format corresponding to the unit of measurement, and/or 2) shows a measurement made automatically by the ruler. A plurality of visual indicators, such as fiber optics, LEDs, etc., extend along the length and light in an amount corresponding to the user inputs or the measurement made. In this manner, basic rulers for school-aged children provide measurement capability in the absence of sufficient gradations. It also gives feedback regarding correctness to stimulate learning in adolescent students. An optical array also serves to transmit/receive light to automatically take the measurements upon indications from a user. A processor connects to the indicators and array for controlling lighting.
