| 摘要 |
PURPOSE:To obtain high picture quality with less coloring density unevenness by decreasing the width of a slit provided in the lengthwise direction of a heat resistor toward heaters close to the block end at block drive. CONSTITUTION:The heat resistor 1 is provided with a slit 4 made of an electric insulator in the lengthwise direction. The width of the slit 4 is the same (l1) except four dots of heat resistors 1c, 1d, 1e, 1f at the block boundary and the slit width of the heaters 1c, 1d, 1e, 1f is formed in the relation of l1>l2>l3 smaller toward the block end. At block drive, since that dissipation is large as the heaters toward the block end, in designing properly the slit width of the plural heat resistors at the end, the produced heat and the heat dissipation are balanced and the temperature is the same as the other heat resistors. |
