Display apparatus and display method

Patent metadata

Field	Value
Publication number	US-11143870-B2
Application number	US-201816476339-A
Country	US
Kind code	B2
Filing date	Feb 15, 2018
Priority date	Feb 17, 2017
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A display apparatus that enhances a response speed while suppressing reduction in durability even when the transmittance control is performed. The display apparatus includes a display, a plurality of light adjustment devices, and a controller. The display is configured to be attached to a head of a user to display information to the user. Each of the plurality of light adjustment devices is configured to change a transmittance to adjust an intensity of light incident from outside. The controller is configured to independently control the transmittances of the plurality of light adjustment devices separately from each other.

First claim

The invention claimed is:

1. A display apparatus, comprising:
a display configured to be attached to a head of a user to display information to the user;
a plurality of light adjustment devices, each configured to change a transmittance to adjust an intensity of light incident from outside, the plurality of light adjustment devices being arranged in a direction of incidence of the light incident from the outside; and
a controller configured to control the transmittances of the plurality of light adjustment devices separately from each other, wherein the controller is further configured to simultaneously change the transmittances of the plurality of light adjustment devices by controlling a time and a magnitude of a voltage applied to the plurality of light adjustment devices, based on a predetermined adjustment table.

2. The display apparatus according to claim 1 ,
wherein, among the plurality of light adjustment devices, a first light adjustment device on an outer side in an incident direction of the light has a transmittance higher than a transmittance of a second light adjustment device on an inner side in the incident direction of the light.

3. The display apparatus according to claim 1 ,
wherein the controller is further configured to control the plurality of light adjustment devices to have different transmittances from each other, and switch the different transmittances with each other at predetermined intervals.

4. The display apparatus according to claim 1 ,
wherein the plurality of light adjustment devices have a plurality of mutually different light adjustment stages, and
wherein the controller is further configured to control the transmittances of the plurality of light adjustment devices by a combination of the plurality of mutually different light adjustment stages.

5. The display apparatus according to claim 1 , further comprising a light intensity detector to detect the intensity of the light,
wherein the controller is further configured to control the transmittances of the plurality of light adjustment devices in accordance with the intensity detected with the light intensity detector.

6. A display method, comprising:
displaying information;
changing transmittances of a plurality of light adjustment devices to adjust an intensity of light incident from outside, the plurality of light adjustment devices being arranged in a direction of incidence of the light incident from the outside;
controlling the transmittances of the plurality of light adjustment devices separately from each other, wherein the controlling step comprises simultaneously changing the transmittances of the plurality of light adjustment devices by controlling a time and a magnitude of a voltage applied to the plurality of light adjustment devices, based on a predetermined adjustment table; and
adjusting a transmission intensity of the light with the plurality of light adjustment devices in accordance with the information.

Assignees

• Ricoh Co Ltd

Inventors

• Igarashi Norikazu
• Hirano Shigenobu
• Katano Yasuo
• Kameyama Kenji
• Maki Takashi
• Gotoh Yuuto
• Tanaka Satomi
• Ikegami Shiroh
• Kawashima Ikue
• Liang Qing

Classifications

• G02B2027/0118

  comprising devices for improving the contrast of the display / brillance control visibility · CPC title

• G02F2201/18

  parallel · CPC title

• G02F1/163

  Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02F1/157

  Structural association of cells with optical devices, e.g. reflectors or illuminating devices · CPC title