Transmissive display apparatus and light control shade for transmissive display apparatus

Abstract

A transmissive display apparatus allows see-through observation in which video light and outside light are superimposed on each other for visual recognition of the superimposed light and further allows a light control shade to control the outside light by changing the outside light transmittance of the light control shade in accordance with a change in quantity of the outside light. In this case, in particular, when a decrease in the outside light quantity is detected with an outside light sensor, which is the outside light detection section, a light quantity control section of a primary control section performs quick response control in which the transmittance of the light control shade is quickly adjusted (outside light quantity is controlled).

Description

BACKGROUND[0001]1. Technical Field[0002]The present invention relates to a transmissive display apparatus that presents a viewer with video images formed by an image display apparatus and a light control shade for the transmissive display apparatus.[0003]2. Related Art[0004]A variety of optical systems have been proposed as those incorporated into a display apparatus (virtual image display apparatus), such as a head mounted display (hereinafter also referred to as HMD) mounted on a viewer's head. In particular, there is a known display apparatus called a see-through-type display apparatus (transmissive display apparatus) that superimposes video light and outside light on each other and allows visual recognition of the superimposed light (see JP-A-2014-160169).[0005]As a transmissive display apparatus of the see-through type, there is a known display apparatus that is provided with a light control apparatus for controlling outside light, and the display apparatus controls the light t...

AI Technical Summary

Benefits of technology

[0023]In still another aspect of the invention, the light quantity control section is capable of switching the light quantity control in accordance with an outside light priority mode in which priority is given to visual recognition of the outside light and a video light priority mode in which priority is given to visual recognition of the video light and performs the quick response control when the apparatus operates in the outside light priority mode. In this case, in display action in which priority is given to visual recognition of the outside light, a dangerous situation in which the outside is invisible due to a decrease in the outside light quantity can be avoided.

[0024]A light control shade for a transmissive display apparatus according to an aspect of the invention is a light control shade that is so provided as to be attachable and detachable to and from a transmissive display apparatus that includes a display section that displays video light and superimposes the video light and outside light on each other to allow visual recognition of the superimposed light, the light control shade so attached as to face the display section and controlling the outside light incident on the transmissive display apparatus, and the light control shade controls the outside light in such a way that increase in outside light transmittance is faster than decrease in the transmittance.

[0025]In the light control shade for a transmissive display apparatus described above, when an outside light detection section detects a decrease in quantity of the outside light, for example, the light control shade quickly adjusts the transmittance thereof (performs outside light quantity control). As a result, appropriate outside light quantity can be ensured, whereby the outside can be visually recognized in a safer manner.

Problems solved by technology

In a light control apparatus, alight control shade, and other similar apparatus, too frequent change in transmission could annoy a viewer against the intention.

However, when the outside light sharply dims, for example, when the viewer who has been in a bright outdoor place in fair weather moves to a dark indoor place, the method described above, in which the amount of moving average is first calculated and then the transmittance is gradually adjusted, requires time for the adjustment until an optimum light quantity is achieved and could therefore undesirably create, for example, a dangerous situation in which the video light is dominant and the outside is invisible during the period of the adjustment.

Images