Abstract: The structure of an image-signal processing apparatus for performing gamma correction and edge enhancement of a image signal is simplified. An edge-correction-gain generation circuit generates a gain signal according to the level of a image signal that has passed through an A-LPF on the basis of a preset transfer characteristic function. An edge-signal generation circuit generates an edge signal corresponding to the edge of the image according to the quadratic differential signal of the image signal. The edge signal is multiplied by the gain signal in a multiplying circuit. An edge-enhanced-signal generation circuit outputs it as an edge enhanced signal. The image signal is subjected to gamma correction by a gamma correction circuit in a different system from the edge-enhanced-signal generation circuit. A combining circuit combines the gamma-corrected image signal with the edge enhanced signal from the edge-enhanced-signal generation circuit.

Abstract: An electric shaver is provided with a motor to drive a cutter, a motor current sensing circuit, and a computation circuit which processes an output from the current sensing circuit. The computation circuit computes beard thickness, and a set range of motor rotational speed regulation according to beard thickness to lower rotational speeds for thin beards and to higher rotational speeds for thick beards, and thereby rotates the motor at optimum speeds according to beard thickness.

Abstract: A printer head has an LED element array which is composed of a plurality of LED chips having a predetermined number of LED elements. In order to reduce the contrast of image forming light profile, end portions of a light emitting portion of the LED element are coated with an SiN film.