JP2008026322A5 - - Google Patents

Claims (13)

A housing (14) having a lower side to face the window;
In a humidity detector for detecting fogging of a window, comprising a humidity sensor (2) for detecting the humidity level of the ambient air,
Printed circuit board (1) is formed at least a part of the lower, the humidity sensor (2) is disposed on the upper side of the printed circuit board (1) is connected to the printed circuit board ,
The humidity detector, wherein the printed circuit board is a flexible printed circuit board .   The humidity detector according to claim 1, wherein the humidity sensor (2) is bonded or soldered to an upper surface of the printed circuit board (1).   The humidity detector according to claim 1 or 2, wherein the humidity sensor (2) includes a semiconductor substrate having an upper surface supporting the integrated circuit (3) and the moisture sensitive layer (4). The humidity sensor (2) has a temperature sensor (7), a humidity sensor of this (2), have a interface to enable the temperature sensor (7), be read by an external system The humidity detector according to any one of claims 1 to 3 . A cap (8) disposed on the humidity sensor (2) is further provided, and the humidity sensor (2) is disposed between the printed circuit board (1) and the cap (8). The humidity detector according to any one of claims 1 to 4 . The humidity detector according to claim 5, wherein the cap (8) is placed on an upper surface of the printed circuit board (1) . The cap (8) has an opening (9) for allowing air exchange between the humidity sensor (2) and the surrounding environment. In particular, the opening is covered with a breathable membrane. The humidity detector according to claim 5 . The humidity detector according to any one of claims 5 to 7, wherein the cap (8) is made of a rigid material. A glider member (11) that is slidably disposed in the housing (14) and connected to the cap (8), and a biasing member that presses the glider member (11) toward the lower surface ( 18) The humidity detector according to any one of claims 5 to 8 , further comprising: The humidity detector according to claim 9 , wherein the urging member (8) is a spring disposed between the housing (14) and the glider member (11). 11. Humidity detector according to claim 9 or 10 , wherein the glider member (11) has a flexible arm (13) engaged with protrusions (8c, 8d) and / or recesses on both sides of the cap. . The flexible printed circuit board (1) has a second position (a predetermined distance from the lower surface) from a first position (23) on the lower surface under the humidity sensor (2). extends 24), said printed circuit board, the humidity detector of claim 1, which is connected to an electronic assembly (22) of the humidity detector at said second position (24). A step of attaching the humidity detector to a vehicle at a position where the printed circuit board (1) contacts the window (20), and in particular, the printed circuit board (1) on the opposite side of the humidity sensor (2); The method for mounting a humidity detector according to any one of claims 1 to 12 , wherein the surface of the surface contacts the windshield (20).