Abstract: A color liquid crystal display comprises a liquid crystal interposed between two transparent electrodes. The electrode on at least one side of the liquid crystal comprises a plurality of pixel electrodes, each pixel electrode defining the area of one pixel of the display. Two or more pixels together form a picture element of the color display. One pixel (a chromatic pixel) of each picture element has a color filter covering the pixel. The other pixel (an achromatic pixel) of each picture element has a translucent (noncolored) filter covering the pixel. The translucent filter also covers a peripheral region of each color pixel. The peripheral region of each chromatic pixel (which is covered by both the color filter and the translucent filter) forms a light shield to increase the contrast of the display. A transparent (noncolored) filter is provided over each achromatic pixel to adjust the overall thickness of the liquid crystal, so as to minimize light leakage at the achromatic pixels.

Abstract: A matrix-addressed liquid crystal display device is constructed of a pair of substrates facing each other with liquid crystal cells arranged in n rows and m columns on one of the substrates. Switches included in each cell comprise field effect transistors with n address lines forming a common connection for the gate electrodes of the field effect transistors in each row and m signal lines forming a common connection for the drain electrode or source electrode of the field effect transistors in each column. A common electrode is arranged on the other substrate and a liquid crystal layer interposed between the substrates. An address line drive circuit supplies a sequential scanning signal to the n address lines; and, a signal line drive circuit supplies a display signal to the m signal lines.An asymmetrical display signal is selected whereby the voltage applied cross the liquid crystal layer is controlled to be a pure AC signal with no DC component.

Abstract: An image pickup apparatus designed to improve the amplitude modulation degree particularly at edge portions of an image comprises an image pickup tube and a yoke assembly. The image pickup tube includes a target, a focusing electrode and an electron beam limiting aperture for limiting the diameter of an electron beam. The yoke assembly comprises means for generating a focusing magnetic field and means for generating a deflection magnetic field. The distance between the electron beam limiting aperture and the target is at least 5.5 times the maximum diameter of the focusing electrode. The half width of the focusing magnetic field intensity distribution along the axis of the image pickup tube is at least 85% of the distance between the electron beam limiting aperture and the target.