Patent ID: 11862082
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 8:
9. A control method of controlling an image display device which includes:
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;
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, the illuminator being 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,
the control method comprising:
obtaining a result of detection of the ambient illuminance performed by the illuminance sensor; and
causing the illuminator to emit illumination light with a brightness that is in accordance with the result of the detection obtained in the obtaining, when the display panel is operating in the transmissive mode, wherein:
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, and

the control method comprises performing 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.