This is the Original Design Manufacturer (ODM). HannStar Display Corporation is a Taiwanese company specializing in LCD panels and display modules. While they are famous for their panels (HannStar LCDs), they also produce the driving logic boards (T-Con boards) and power supply units for their displays. If you see "Hannstar," you are likely dealing with a monitor from brands like Acer, HP, Dell, or ViewSonic that uses a HannStar OEM board.