Light-source circuit unit, illumination device, and display device

There are provided a light-source circuit unit, an illumination device, and a display device which are capable of extracting light emitted from the back surface of a light-emitting element chip to thefront surface, suppressing a reduction in reflectance, and reducing cost, with a simple configuration. The light-source circuit unit includes a circuit substrate that has a light-reflective wiring pattern on a surface thereof and includes a chip mounting layer as a part of the wiring pattern, and one or more light-emitting element chips that are directly placed on the chip mounting layer, and aredriven by a current flowing through the wiring pattern. 提供种光源电路单元、种照明器件和种显示器件，其能用简单的构造将从发光元件芯片的背表面发射的光取到前表面，抑制反射率的减小并降低成本。所述光源电路单元包括：电路基板，具有在其表面上的光反射配线图案且包括作为所述配线图案的部分的芯片安装层；以及个或多个发光元件芯片，直接置于所述芯片安装层上，且由流经所述配线图案的电流驱动。