Projection display device

摘要

A projection display device includes light source device including a plurality of lamp units; a plurality of lamp apertures disposed in main body cabinet such that the plurality of lamp units are replaced therethrough; a plurality of lamp covers for covering respective lamp apertures; four first detection switches for detecting opening and closing of respective lamp covers; and lamp control power source unit for supplying ballast control voltage signal to first detection switches. Four first detection switches are disposed on sub-circuit board. Sub-circuit board also includes conductive pattern for branching ballast control voltage signal input to first jack and leading the branched signal to first detection switches.

主权项

1. A projection display device, comprising:
a light source device including a plurality of light sources and combining light from the light sources such that the combined light emits from the light source device; a light modulator for modulating the light having emitted from the light source device; a main body cabinet having the light source device and the light modulator disposed therein; a plurality of apertures disposed in the main body cabinet such that the respective light sources are taken in and out therethrough; a plurality of light source covers for covering the respective apertures; a plurality of opening and closing detectors disposed correspondingly to the respective light source covers and detecting opening and closing of the respective light source covers; and a supply part for supplying an electrical signal to the respective opening and closing detectors, wherein the respective opening and closing detectors are disposed on one circuit board, and the circuit board includes an input part to which the electrical signal is input from the supply part; and a conductive path for branching the electrical signal having input to the input part and for leading the branched signal to each of the opening and closing detectors.