Display device and lamp panel thereof

The utility model provides a display device and a lamp panel thereof, the lamp panel comprises a plurality of jointed boards arranged in an array, and any jointed board comprises a light emitting unit and a substrate; any light-emitting unit comprises three light-emitting diodes which respectively emit red light, green light and blue light; the cathodes of the three light-emitting diodes are connected to the same first pin, and the anodes of the three light-emitting diodes are respectively connected to one second pin; the substrate is provided with a first edge and a second edge which are oppositely arranged; the first pins of the light-emitting units adjacent to the first edge and the second edge are arranged towards the corresponding edge of the substrate; blind holes are formed in the positions, adjacent to any first pin and any second pin, of the substrate, and the blind holes are electrically connected to the corresponding second pins or the first pins. Only one blind hole needs to be formed between the