The invention relates to a novel backlight source. The backlight module comprises an adhesive-iron frame, a reflection sheet, a light guide plate and a backlight diaphragm; the reflection sheet, the light guide plate and the backlight diaphragm are sequentially arranged in the adhesive-iron frame from bottom to top; the backlight diaphragm comprises a diffusion film, a lower brightness enhancementfilm and an upper brightness enhancement film sequentially arranged from bottom to top; the light guide plate is provided with an FPC flat cable type LED lamp; the FPC flat cable type LED lamp comprises an FPC substrate; the front surface of the FPC substrate is provided with a front circuit bonding pad; the front surface of the FPC substrate, except the front circuit bonding pad, is covered witha bonding pad surface covering film; the back surface of the FPC substrate is covered with a non-bonding pad surface covering film; and an LED lamp with a white light source is pasted on the front circuit bonding pad. According to the novel backlight source of the invention, the bonding pad surface covering film is additionally adopted, so that the problems of bright bands, yellowing and the likeof a backlight lamp socket can be improved, and at the same time, chromaticity coordinates can be lowered, color temperature increase and backlight color change can be decreased, and the brightness of the novel backlight source can be improved by 1% under the same color coordinates.