Circuit board and electronic device thereof

An electronic device, comprising a circuit board,

• wherein the circuit board comprises:
• a substrate;
• an insulating ink layer disposed on the substrate;
• a component disposed on a side of the insulating ink layer facing away from the substrate, wherein a component of the component is electrically connected to the substrate through a window opening area on the substrate;
• and
• an encapsulation layer disposed on a side of the component facing away from the substrate;
• wherein the insulating ink layer comprises a first hydrochromic material, wherein in a case where humidity exceeds a first humidity threshold, the first hydrochromic material changes from a first color to a second color;
• and
• wherein
• the electronic device further comprises a display panel and a device housing, wherein a side of the device housing attached to the display panel is an inner side of the device housing, the inner side of the device housing is provided with a fourth hydrochromic material, and in a case where humidity exceeds a fourth humidity threshold, the fourth hydrochromic material changes from a seventh color to an eighth color.