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Transmissive display apparatus and light control shade for transmissive display apparatus

a display apparatus and display device technology, applied in lighting and heating devices, instruments, lighting device details, etc., can solve the problems of too frequent change of transmission, annoyance of viewers against the intention, dangerous situation, etc., and achieve the effect of increasing the outside light transmittance and quickly adjusting the transmittance thereo

Inactive Publication Date: 2017-03-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a display that can show both outside light and video light on the same screen, allowing people to see both at the same time. This is safer than simply showing outside light because it doesn't blind people. The invention also has a special light control shade for this display.

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.

Method used

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  • Transmissive display apparatus and light control shade for transmissive display apparatus
  • Transmissive display apparatus and light control shade for transmissive display apparatus
  • Transmissive display apparatus and light control shade for transmissive display apparatus

Examples

Experimental program
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first embodiment

[0043]A light guide apparatus and a transmissive display apparatus including the light guide apparatus according to an embodiment of the invention will be described below in detail with reference to FIG. 1 and other figures.

[0044]A transmissive display apparatus 100 including the light guide apparatus according to the present embodiment is not only a head mounted display having a glasses-like exterior appearance, as shown in FIGS. 1 to 3A and 3B, but also a virtual image display apparatus that allows a viewer or a user who wears the transmissive display apparatus 100 to visually recognize image light (video light) in the form of a virtual image, and the transmissive display apparatus 100 further allows the viewer to visually recognize or view a see-through outside image (allows outside light to pass the apparatus). In particular, a light control shade 90, which blocks or absorbs light, is attached to the transmissive display apparatus 100 according to the present embodiment. The lig...

second embodiment

[0091]A transmissive display apparatus according to a second embodiment will be described below. The present embodiment is a variation of the transmissive display apparatus according to the first embodiment and is the same as the first embodiment except items about the light control shade, and no overall detailed description of the present embodiment will therefore be made.

[0092]FIG. 11 is a block diagram for describing a transmissive display apparatus 200 according to the present embodiment and corresponds to FIG. 5.

[0093]Comparison of FIG. 11 with FIG. 5 clearly shows that in the transmissive display apparatus 200 according to the present embodiment, the light quantity control section 291 of the primary control section 290 is provided with no outside light transmittance control section that adjusts the transmittance of the light control shade. In the present embodiment, the video light luminance control section IC, which forms the light quantity control section 291, controls the v...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02B27/01F21V23/04
CPCG02B27/0172G02B2027/0118F21V23/0464G02B2027/0178
Inventor TAKAGI, MASAYUKITOTANI, TAKAHIROTAKEDA, TAKASHIKOMATSU, AKIRAMIYAO, TOSHIAKI
Owner SEIKO EPSON CORP
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