Abstract: A calibrating system of a display characteristic measurement apparatus includes a calibration pattern display unit for displaying a calibration pattern at substantially the same luminescence characteristic as that of a display apparatus to be measured, an image pickup unit provided in a display characteristic measurement apparatus for picking up a calibration pattern displayed on the display apparatus to generate image data, and a calculator for calculating, based on the generated image data, calibration data for the display characteristic measurement apparatus.

Abstract: A molding apparatus for producing a synthetic resin molded product including a forming mold with a molding cavity, a gate communicating with the cavity, and an overflow chamber communicating with the cavity through a flow-out passage, a gas blow-in mechanism for blowing gas into molten synthetic resin which has been injected into the cavity through the gate so as to form a void in the molten synthetic resin in the cavity to mold a hollow product and a flow-out passage opening and closing mechanism for closing the flow-out passage until the molten resin fills the molding cavity and opening the flow-out passage when the gas blow-in mechanism is in operation.

Abstract: A CRT measurement device includes an image pickup device for producing an electrical image signal with respect to a light image displayed on the CRT, an optical system having a movable focusing lens for providing a light image of varied sharpness to the image pickup means in accordance with position of the focusing lens, a sharpness detector for detecting the sharpness of a picked up image based on an electrical image signal each time the focusing lens is moved, a focal position detector for detecting a focal position of the focusing lens providing a most sharpness light image, a driver for driving the focusing lens so as to move to the detected focal position, and calculator means for calculating a characteristic of the color CRT based on the image signal produced when the focusing lens is at the focal position. This device assures automatic and accurate focusing.

Abstract: A device for measuring convergence of color cathode ray tube including means for producing a white measurement pattern on a viewing screen of the color cathode ray tube, a color image pickup device for picking up the white measurement pattern on the viewing screen, a memory unit for storing color signals transmitted from the color image pickup device, a discrimination unit for discriminating which of blue, green, and red phosphors glows every picture elements of the color image pickup device based on signals from adjacent picture elements, and a calculation unit for a finding out a misconvergence from discriminated results assures an accurate convergence measurement by one time of image pickup only.

Abstract: A built in radio/hearing aid comprises a control voltage generator means which generates a control voltage depending on the level of a microphone signal of the hearing aid and a mixing control means which controls the ratio of the mixture of a radio signal from a radio signal generator and the microphone signal from a microphone in accordance with the level of the control voltage. Thus, the level of the radio signals is automatically changed in accordance with the level of circumstantial audio signals within the microphone signal.