Patent ID: 8642927
Filing Date: 2014-02-04
Classification: G03G,H05B

Abstract:
1. A heater comprising: an elongated substrate having longitudinal and lateral dimensions; and first and second heat generation lines configured to generate heat, the first and second heat generation lines being provided on the substrate along a longitudinal direction of the substrate, each of the first and second heat generation lines including a first heat generation block and a second heat generation block which are electrically connected in series and arranged along the longitudinal direction of the substrate, wherein each of the first and second heat generation blocks includes first and second conductive members provided on the substrate along the longitudinal direction of the substrate and a plurality of heat generation resistors connected in parallel between the first conductive member and the second conductive member, wherein the plurality of heat generation resistors in the first and second heat generation blocks is diagonally arranged with respect to the longitudinal direction of the substrate and with respect to a direction perpendicular to the longitudinal direction of the substrate, wherein a component in the longitudinal direction of the substrate of the direction of current flowing through the plurality of the heat generation resistors in the first heat generation block is the same as a direction of current flowing through the first and second conductive members in the first heat generation block, and a component in the longitudinal direction of the substrate of the direction of current flowing through the plurality of the heat generation resistors in the second heat generation block is opposite to a direction of current flowing through the first and second conductive members in the second heat generation block, and wherein the first and the second heat generation lines are arranged so that an entire region of the first heat generation block in the first heat generation line and an entire region of the second heat generation block in the second heat generation line are located at the same position in the longitudinal direction of the substrate, and an entire region of the second heat generation block in the first heat generation line and an entire region of the first heat generation block in the second heat generation line are located at the same position in the longitudinal direction of the substrate that is different from the same position at which an entire region of the first heat generation block in the first heat generation line and an entire region of the second heat generation block in the second heat generation line are located.