| 摘要 |
PURPOSE:To simplify and miniaturize an optical printer and to increase the resolving power and area of a printing head by forming the title element by interposing a photoconductor and a heating resistor between a pair of electrodes in a laminated state and constituting at least the electrode on the side of the photoconductor layer of a light pervious electrode. CONSTITUTION:Since mechanical strength is inferior when only an element is used, a transparent base 6 is used as a support and a transparent electrode layer 1 is formed thereon and a photoconductor layer 2 is formed on said electrode layer 1 while a heating resistor layer 3 consisting of a large number of heating resistors 3A separated by insulators 3B are formed on said layer 2 and an electrode layer 4 is further formed thereon. When constant voltage is applied between the transparent electrode 1 and the electrode layer 4 and the element is irradiated with light on the side of the transparent substrate, the conductivity of the photoconductor layer rises at the part irradiated with light of the element and a current flows to the heating resistor layer 3 to generate heat. The thermal color forming body 5 arranged under the electrode layer 4 develops a color by said heat and, since the element generates no heat at a part not irradiated with light, the thermal color forming body forms no color pattern and, therefore, a developed color pattern is recorded on the thermal color forming body according to a light irradiation pattern. |
