LED display unit group with common A-electrode pads and display panel

A display panel, comprising a LED display unit group,

• wherein the LED display unit group comprises:
• a circuit board, wherein the circuit board comprises N metal line layers stacked in sequence and an insulating plate located between adjacent metal line layers, and the N metal line layers are electrically connected through conductive vias in the insulating plate, wherein N≥2;
• and
• pixel units arranged in an array of m rows and n columns on the circuit board, wherein each of the pixel units comprises at least two LED light-emitting chips with different light-emitting colors, and the at least two LED light-emitting chips are fixed on a first metal line layer of the N metal line layers, wherein m≥2, and n≥2,
• wherein the first metal line layer comprises m common A-electrode pads, a plurality of A-electrode pads and a plurality of B-electrode pads;
• the plurality of A-electrode pads are in one-to-one correspondence with A-electrodes of all LED light-emitting chips;
• the plurality of B-electrode pads are in one-to-one correspondence with B-electrodes of all the LED light-emitting chips;
• and all A-electrode pads in the pixel units in each row are electrically connected to a respective one of the m common A-electrode pads;
• wherein ones of the plurality of A-electrode pads corresponding to LED light-emitting chips with a same light-emitting color in the pixel units in a same row are disposed to be bilaterally symmetric about a central axis of the circuit board in a vertical direction, and ones of the plurality of B-electrode pads corresponding to the LED light-emitting chips with the same light-emitting color in the pixel units in the same row are disposed to be bilaterally symmetric about the central axis of the circuit board in the vertical direction;
• and
• wherein each of the m common A-electrode pads is U-shaped, and a U-shaped opening direction of one of the m common A-electrode pads in a first row of the m rows is opposite to a U-shaped opening direction of one of the m common A-electrode pads in an m-th row of the m rows.

A light-emitting diode (LED) display unit group, comprising:

• a circuit board, wherein the circuit board comprises N metal line layers stacked in sequence and an insulating plate located between adjacent metal line layers, and the N metal line layers are electrically connected through conductive vias in the insulating plate, wherein N≥2;
• and
• pixel units arranged in an array of m rows and n columns on the circuit board, wherein each of the pixel units comprises at least two LED light-emitting chips with different light-emitting colors, and the at least two LED light-emitting chips are fixed on a first metal line layer of the N metal line layers, wherein m≥2, and n≥2,
• wherein the first metal line layer comprises m common A-electrode pads, a plurality of A-electrode pads and a plurality of B-electrode pads;
• the plurality of A-electrode pads are in one-to-one correspondence with A-electrodes of all LED light-emitting chips;
• the plurality of B-electrode pads are in one-to-one correspondence with B-electrodes of all the LED light-emitting chips;
• and all A-electrode pads in the pixel units in each row are electrically connected to a respective one of the m common A-electrode pads;
• wherein ones of the plurality of A-electrode pads corresponding to LED light-emitting chips with a same light-emitting color in the pixel units in a same row are disposed to be bilaterally symmetric about a central axis of the circuit board in a vertical direction, and ones of the plurality of B-electrode pads corresponding to the LED light-emitting chips with the same light-emitting color in the pixel units in the same row are disposed to be bilaterally symmetric about the central axis of the circuit board in the vertical direction;
• wherein an N-th metal line layer of the N metal line layers comprises m common A-electrode pins and 3n common B-electrode pins, wherein each of the m common A-electrode pins is electrically connected to a respective one of the m common A-electrode pads corresponding to A-electrodes of LED light-emitting chips of the pixel units in one row, and each of the 3n common B-electrode pins is electrically connected to respective ones of the plurality of B-electrode pads corresponding to B-electrodes of LED light-emitting chips with a same light-emitting color of the pixel units in one column;
• and
• wherein the first metal line layer comprises m connection parts, each of the m common A-electrode pads is U-shaped and is electrically connected to a respective one of the m connection parts in a same row, and each of the m connection parts is electrically connected to a respective one of the m common A-electrode pins through one of the conductive vias.