Electronic machine, display device, and control machine having the electronic machine

The present invention provides an electronic machine, a display device and a control machine having the electronic machine, capable of increasing light utilization efficiency by introducing light irradiation from a light source part into a light guide plate with excellent efficiency. A temperature regulator 10 is equipped with a control substrate 21, an LED 22, a reflector sheet 23 and a light guide plate 24. LEDs 22a and 22b are mounted on the control substrate 21 such that light is irradiated at a direction parallel to the surface of the control substrate 21. The reflector sheet 23 is arranged at a position adjacent to the LEDs 22a and 22b while spaced apart from the control substrate 21 by a predetermined spacing, such that light is reflected at a direction across the control substrate 21. The light guide plate 24 is configured on the reflector sheet 23 and provided with a protrusion part 25 protruded into the gap between the light irradiation side end face of the LEDs 22a and 22b and the end face of the o