Information terminal
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorYuki Okamoto
Life of this patent
Estimating the term…
Abstract
An information terminal with low power consumption is provided. The information terminal includes a liquid crystal element, a light-emitting element, a first transistor, and a touch sensor. The touch sensor includes a photodiode, a second transistor, and a third transistor. The first transistor has a function of controlling a current flowing through the light-emitting element. The photodiode is electrically connected to a gate of the third transistor through the second transistor. A gate of the first transistor is electrically connected to the gate of the third transistor through at least one transistor.
Claims16
A display panel comprising:
- a light-emitting element;
- a first transistor controlling a current flowing through the light-emitting element;
- and
- a touch sensor comprising a photodiode, a second transistor, and a third transistor,
- wherein the photodiode is connected by an electrically conductive path to a gate of the third transistor through the second transistor, and
- wherein a gate of the first transistor is connected by an electrically conductive path to the gate of the third transistor through a fourth transistor.
A display panel comprising:
- a liquid crystal element;
- a light-emitting element;
- a first transistor controlling a current flowing through the light-emitting element;
- and
- a touch sensor comprising a photodiode, a second transistor, and a third transistor,
- wherein the photodiode is connected by an electrically conductive path to a gate of the third transistor through the second transistor, and
- wherein a gate of the first transistor is connected by an electrically conductive path to the gate of the third transistor through a fourth transistor.
A display panel comprising:
- a light-emitting element over a first substrate;
- a first transistor electrically connected to the light-emitting element;
- a touch sensor over the first substrate, the touch sensor comprising a photodiode, a second transistor, and a third transistor;
- and
- a liquid crystal element over the light-emitting element,
- wherein the photodiode is connected by an electrically conductive path to a gate of the third transistor through the second transistor,
- wherein a gate of the first transistor is connected by an electrically conductive path to the gate of the third transistor through at a fourth transistor,
- wherein the liquid crystal element displays an image,
- wherein the touch sensor senses a handwritten information input by a user and adds the handwritten information to the image, and
- wherein the handwritten information is displayed by the light-emitting element.
Dependencies are inferred from the claim text.