US 11,862,082 B2
Image display device and method of controlling image display device
Takeichi Shinya, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/765,235
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Oct. 19, 2020, PCT No. PCT/JP2020/039298
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/085222, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-196617 (JP), filed on Oct. 29, 2019.
Prior Publication US 2022/0351678 A1, Nov. 3, 2022
Int. Cl. G09G 3/3225 (2016.01)
CPC G09G 3/3225 (2013.01) [G09G 2300/02 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An image display device comprising:
a display panel which is switchable between an image display mode and a transmissive mode, the image display mode being a mode in which an image is displayed on the display panel, the transmissive mode being a mode in which the display panel is in a transmissive state where a back side of the display panel is visible in a front view of the display panel;
a space portion which is provided behind the display panel;
an illuminator which is disposed outside of and behind the display panel, and emits illumination light to the space portion;
a controller which controls the illuminator;
an illuminance detector which detects an ambient illuminance of the image display device; and
a frame body that holds the display panel, forms the space portion and includes four walls which surround the display panel from top, bottom, left, and right in the front view, wherein:
when the display panel is operating in the transmissive mode, the controller performs illumination control for causing the illuminator to emit illumination light with a brightness that is in accordance with a result of detection by the illuminance detector,
the display panel includes:
an image display panel which displays an image when the display panel is operating in the image display mode; and
a light control panel which is disposed behind the image display panel, and is switchable between a transmissive state and a non-transmissive state, the transmissive state being a state where light is transmissive through the light control panel, the non-transmissive state being a state where light is not transmissive through the light control panel,
the controller further performs the illumination control according to the result of the detection, when the display panel operates in the image display mode and the light control panel is in the transmissive state, and
the illuminator is disposed in at least one of the four walls, at a position behind the display panel to emit the illumination light to the space portion.