Electronic device and electronic system
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHikaru Tamura, Yoshiyuki Kurokawa, Takayuki Ikeda
Life of this patent
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Abstract
To provide a display device in which a moving-image mode and a still-image mode which consumes less power can be switched on one screen automatically or by operation by a user on one display screen. The display device includes a display panel including a photosensor for detecting touch input by a user; a display control circuit for displaying a keyboard on part of the display screen; and a storage medium storing a program (an application program) for controlling power supplied to a still-image area of the displayed keyboard. The program for controlling power supplied to the still-image area enables power saving.
Claims13
A display device comprising:
- a display panel including a photosensor configured to detect touch input performed on a display screen, in a pixel portion;
- a display control circuit configured to display an operation button on part of the display screen in accordance with a detection by the photosensor;
- and
- a storage medium configured to store a program for controlling power supplied to a still-image area of the displayed operation button.
A display device comprising:
- a display panel including a photosensor configured to detect a shadow casted on a display screen without touch, in a pixel portion;
- a display control circuit configured to display an operation button on part of the display screen in accordance with a detection by the photosensor;
- and
- a storage medium configured to store a program for controlling power supplied to a still-image area of the displayed operation button.
Dependencies are inferred from the claim text.