Illumination unit and display

摘要

An illumination unit includes: a light source section including a laser light source; an optical-path branching device outputting light incident from the light source section, by branching the light into an outgoing optical path of illumination light and other optical path; a photodetector receiving a light flux that travels on the other optical path; a control section controlling an emitted light quantity in the laser light source, based on a quantity of the light flux received by the photodetector; and a light-quantity-distribution control device disposed between the optical-path branching device and the photodetector on the other optical path, the light-quantity-distribution control device controlling a light quantity distribution in the light flux to be incident upon the photodetector.

主权项

1. An illumination unit, comprising:
a light source device that includes a laser light source; an optical-path branching device configured to branch a light incident from the light source device into a first optical path of an illumination light and a second optical path; a photodetector configured to receive a light flux configured to travel on the second optical path; a first light control device configured to control a light quantity emitted by the laser light source, based on a quantity of the light flux received by the photodetector,
wherein the light quantity emitted by the laser light source is maintained to be substantially constant independent of a temperature change of the laser light source; and a second light control device disposed between the optical-path branching device and the photodetector on the second optical path, wherein the second light control device is configured to control a light quantity in the light flux to be incident upon the photodetector.