Abstract: A method of simulating how output video from a video instrument that presents video appears under a given viewing environment includes: inputting an environmental illuminance in a viewing environment in which output video is viewed; inputting a set condition with regard to the video instrument, the set condition including at least optical output; and calculating and outputting, by using the environmental illuminance and the set condition, a video contrast based on a ratio between an illuminance of the output video and the environmental illuminance at a video formation plane on which the output video is formed.

Abstract: A method of simulating how output video from a video instrument that presents video appears under a given viewing environment includes: inputting an environmental illuminance in a viewing environment in which output video is viewed; inputting a set condition with regard to the video instrument, the set condition including at least optical output; and calculating and outputting, by using the environmental illuminance and the set condition, a video contrast based on a ratio between an illuminance of the output video and the environmental illuminance at a video formation plane on which the output video is formed.

Abstract: Provided is an electronic equipment cabinet capable of detecting a storage state of a circuit board unit by using a smaller number of switches than circuit board units. The electronic equipment cabinet, which stores a plurality of circuit board units inserted and extracted in the same direction, includes a plurality of slots for storing the circuit board units, a plurality of cover members for covering the slots, and a switch for detecting closing of all the slots. The cover members, which are provided by a plurality of types having an installation order restricting mechanism for preventing closing of the slots, except for when the cover members are installed according to a preset installation order, includes a driving member located in a final-installation cover member that is installed last and configured to drive the switch.

Abstract: Provided is an electronic equipment cabinet capable of detecting a storage state of a circuit board unit by using a smaller number of switches than circuit board units. The electronic equipment cabinet, which stores a plurality of circuit board units inserted and extracted in the same direction, includes a plurality of slots for storing the circuit board units, a plurality of cover members for covering the slots, and a switch for detecting closing of all the slots. The cover members, which are provided by a plurality of types having an installation order restricting mechanism for preventing closing of the slots, except for when the cover members are installed according to a preset installation order, includes a driving member located in a final-installation cover member that is installed last and configured to drive the switch.