Full-color light source unit

摘要

A light-emitting system has a base (2), and LEDs (3) disposed on a front surface (2a) of the base (2). The alignment of LEDs (3) includes a first group of LEDS each having first and second electrodes (3a, 3b) on a light-emitting surface side, and a second group of LEDs each having a first electrode on the light-emitting surface side and a second electrode on the base side. The first group of LEDS and the second group of LEDs are arranged alternately in a line on the front surface of the base. Even in the case where the LEDs are arranged densely, the LEDs can be mounted compactly because the LEDs can be connected easily by bonding wires(8). The first group of LEDs includes at least one blue LED (3B), green LEDs (3G) larger in number than the blue LED(3B). The second group of LEDs includes red LEDs (3R) larger in number than the blue LED (3B). A full-color light source unit has these LEDs (3) and is used so that light components emitted from the respective LEDs of the full-color light source unit are mixed together to form white light in alight mixing portion. The white light is made incident into a surface light guide portion to make the surface light guide portion emit light.