Patent ID: 6690131
Filing Date: 2004-02-10
Classification: B60R,E05F,E05Y,G05B,H01H

Abstract:
A power window switch circuit comprising:a first relay coil having a first terminal and a second terminal; a down switch connected to the first relay coil for lowering a window glass; a second relay coil having a first terminal and a second terminal; and an up switch connected to the second relay coil for raising the window glass, wherein each of the down switch and the up switch has a first fixed contact connected to a power supply, a second fixed contact connected to the ground, and a movable contact selectively connecting one of the first and second fixed contacts to the first terminal of the corresponding relay coil; wherein the movable contact includes a first movable contact as a normally open contact with respect to the first fixed contact and a second movable contact as a normally closed contact with respect to the second fixed contact, and wherein the first movable contact and the second movable contact move together and the first movable contact is connected to the first fixed contact after the second movable contact is disconnected from the second fixed contact; a first switching element connected between the second fixed contacts of the down and up switches and the ground and responsive to a soak detection signal, wherein the first switching element is also connected between the second terminals of the first and second relay coils and the ground; and a soak detection circuit for supplying the soak detection signal to the first switching element when detecting a soak.