US Patent 11273638 Liquid discharge head and liquid discharge module

A liquid discharge head includes a substrate, pressure chambers, a pressure generating element, a discharge port, and a liquid channel. First and second communication supply channels and first and second communication collecting channels are formed in the substrate. A central axis of a first communication supply opening is located closer to the corresponding pressure chamber than a central axis of a first common supply opening, or a central axis of a second communication supply opening is located closer to the corresponding pressure chamber than a central axis of a second common supply opening, or a central axis of a first communication collecting opening is located closer to the corresponding pressure chamber than a central axis of a first common collecting opening, or a central axis of a second communication collecting opening is located closer to the corresponding pressure chamber than a central axis of a second common collecting opening.