Flexible Circuit Board, Light Bar, Light Source and Display Device

A light bar for fixing to a flexible circuit board and receiving a signal provided by the flexible circuit board, the light bar comprising:

• at least one effective pad configured to be fixed to a corresponding effective welding portion on the flexible circuit board and to acquire a signal transmitted by the corresponding effective welding portion;
• and
• at least one auxiliary pad configured to be fixed to a corresponding auxiliary welding portion on the flexible circuit board to enhance firm fixing between the flexible circuit board and the light bar.

A light source comprising a flexible circuit board having at least one effective welding portion, and a light bar having at least one effective pad, the at least one effective welding portion being in one-to-one correspondence with the at least one effective pad, and the effective welding portion being fixed to a corresponding effective pad to transmit a signal loaded by itself to the corresponding effective pad, wherein the flexible circuit board further includes at least one auxiliary welding portion, the light bar further includes at least one auxiliary pad, the at least one auxiliary welding portion is in one-to-one correspondence with the at least one auxiliary pad, and the auxiliary welding portion is fixed to a corresponding auxiliary pad to enhance firm fixing between the flexible circuit board and the light bar.