Abstract: The function expanding method for a display device comprises: a step of preparing a plurality of types of function expanding modules; a step of selecting a function expanding module or modules from the plurality of types of function expanding modules; and a step of stacking the selected single or plurality of function expanding module(s) to a rear part of the display device at will, and connecting the module(s) by using expanding connector(s).

Abstract: The function expanding method for a display device comprises: a step of preparing a plurality of types of function expanding modules; a step of selecting a function expanding module or modules from the plurality of types of function expanding modules; and a step of stacking the selected single or plurality of function expanding module(s) to a rear part of the display device at will, and connecting the module(s) by using expanding connector(s).

Abstract: A method and an apparatus for controlling a machine tool including cylindrical grinding machine in which the specific portion to be controlled on a machine tool is automatically controlled by fuzzy reasoning on the basis of the measured data values about the specified portion composing said machine tool. With this method and apparatus, the change points of infeed speed and the spark out starting point can be automatically decided, and the necessity of changing of coolant and dressing can be automatically judged.

Abstract: A method for determining the deformation of workpiece on a grinding machine is proposed, in which the deformation of workpiece can be determined without using the less reliable initial deformation.Suppose the deflection at the beginning and the final deflection for the last time be T' (s) and T' (e), respectively, and the deformation preset for the grinding completion time be Ta, the deformation T (s) at the operation start time for the workpiece in the present time is approximated by the expressionT(s)=T' (s)-T' (e)+TaSuppose the shift of grinding wheel for the workpiece be .DELTA.A, and the change in diameter be D(x)-D(s), the deformation T(x) at a time for the present time is determined from the expressionT(x)-.DELTA.A+(D(x)-D(s))/2+T(s).