Abstract: The present invention is directed to reduce the size of a liquid crystal driver (semiconductor integrated circuit for driving liquid crystal) having therein a D/A converting circuit, converting digital image data to analog gradation voltage, and outputting a voltage to be applied to a signal line (source line) of a color liquid crystal panel. Output amplifiers of the final stage for outputting an image signal converted to gradation voltage are divided into a plurality of groups. D/A converting circuits for converting image data to gradation voltage are provided as circuits common to the groups. While switching the group, the D/A converting circuit is operated in a time sharing manner. The output amplifiers in the final stage related to image signals of the same color are selected and grouped. A selector function is provided between the D/A converting circuit and the output amplifier, and an image signal converted to gradation voltage by the D/A converting circuit is supplied to a desired hold circuit.

Abstract: The present invention is directed to reduce the size of a liquid crystal driver (semiconductor integrated circuit for driving liquid crystal) having therein a D/A converting circuit, converting digital image data to analog gradation voltage, and outputting a voltage to be applied to a signal line (source line) of a color liquid crystal panel. Output amplifiers of the final stage for outputting an image signal converted to gradation voltage are divided into a plurality of groups. D/A converting circuits for converting image data to gradation voltage are provided as circuits common to the groups. While switching the group, the D/A converting circuit is operated in a time sharing manner. The output amplifiers in the final stage related to image signals of the same color are selected and grouped. A selector function is provided between the D/A converting circuit and the output amplifier, and an image signal converted to gradation voltage by the D/A converting circuit is supplied to a desired hold circuit.

Abstract: It is an object of the invention to provide a casting method for forming a resin molding which is able to cast the resin molding according to an assembly line production system while completely eliminating variations in quality between products. In the casting method according to the present invention, a plurality of metal molds are circulated at a given time difference in the order of a step of casting a hardenable resin composition into a preheated metal mold, a step of heating and hardening the casted resin composition, and a step of releasing the hardened product from the metal mold and assembling the metal mold. There are provided a plurality of heating devices and, while one metal mold in the hardening step is being heated by one of the heating devices, the other metal mold is heated at the above given time difference by the other of the heating devices.