JP2006159893A5 - - Google Patents

Claims (8)

A plurality of discharge ports for discharging liquid, a plurality of flow passages each communicating with each of the discharge ports, a supply port formed on the substrate and supplying the liquid to each flow passage, and heat generation formed on the substrate A plurality of recording elements, each of which is formed of a resistor and disposed in a position facing each of the discharge ports in each of the flow paths;
The plurality of discharge ports are arranged in a staggered manner on at least one side of the supply port so as to include a first discharge port having a relatively small distance from the supply port and a second discharge port having a relatively large distance. And the plurality of recording elements are configured to include a first recording element and a second recording element corresponding to the first and second ejection ports,
A liquid ejection head, wherein an aspect ratio of the first and second recording elements with reference to a flow path direction is smaller than an aspect ratio of the second recording element. The amount of liquid droplets discharged from the first and second discharge ports is substantially the same;
0.95> area of the second recording element / area of the first recording element> 0.60, and
Aspect ratio of second recording element / Aspect ratio of first recording element <0.95
The liquid discharge head according to claim 1, wherein: The liquid discharge head according to claim 1 , wherein the amount of liquid droplets discharged from the second discharge port is smaller than the amount of liquid droplets discharged from the first discharge port.   The liquid discharge head according to claim 3, wherein the amount of liquid droplets discharged from the second discharge port is 0.4 to 1.0 pl.   The plurality of flow paths include a first flow path in which the first recording element is disposed and a second flow path in which the second recording element is disposed, of the second flow paths The width dimension of a portion located between the first recording elements is formed to have a dimension substantially the same as or less than the width dimension of the first recording element. The liquid discharge head according to claim 1.   On both sides of the supply port, there are two discharge port groups each composed of the first and second discharge ports, and the discharge port group on one side and the discharge port group on the other side are The liquid ejection head according to claim 1, wherein the liquid ejection head is disposed so as to be relatively shifted by a distance that is half the arrangement pitch. Further comprising a power supply means for supplying a driving voltage to the respective recording element, and a driver having a pre-Symbol function of switching the conduction state of each recording element, and a logic circuit for selectively driving said driver,
The logic circuit includes a drive time determination signal means for outputting a signal related to the drive time of each printing element to the driver separately for each of the first and second printing elements. The liquid discharge head according to any one of 6. Further comprising a power supply means for supplying a driving voltage to the respective recording element, and a driver having a pre-Symbol function of switching the conduction state of each recording element, and a logic circuit for selectively driving said driver,
The liquid discharge head according to claim 1, wherein the power supply unit is provided separately for each of the first and second recording elements.