Display device and electronic book

A display device comprising:

• a pixel comprising a display portion and a sensor portion,
• wherein the display portion comprises a first liquid crystal element comprising a pixel electrode, a liquid crystal layer including a liquid crystal material, and a polymer and a counter electrode,
• wherein the sensor portion comprises a light-receiving element and a second liquid crystal element comprising a sensor electrode provided over the light-receiving element, the liquid crystal layer including the liquid crystal material, and the polymer and the counter electrode,
• wherein the first liquid crystal element and the second liquid crystal element are driven independently by being electrically independent the pixel electrode of the sensor electrode, and
• wherein the light-receiving element receives light transmitting through the second liquid crystal element.

A display device comprising:

• a pixel comprising a sensor portion,
• wherein the sensor portion comprises a light-receiving element and a liquid crystal element comprising a sensor electrode provided over the light-receiving element, a liquid crystal layer including a liquid crystal material and a polymer, and a counter electrode,
• wherein the liquid crystal element is configured to control light reception in the light-receiving element, and
• wherein the light-receiving element receives light transmitting through the liquid crystal element.

A display device comprising:

• a pixel comprising a display circuit and a sensor circuit,
• wherein the display circuit comprises a first transistor controlling input of a video signal and a first liquid crystal element to which the video signal is input,
• wherein the first liquid crystal element comprising a pixel electrode, a liquid crystal layer including a liquid crystal material and a polymer, and a counter electrode,
• wherein the sensor circuit comprises a light-receiving element converting light into an electric signal, a second transistor generating an output signal from the electric signal, a third transistor controlling reading of the output signal, and a second liquid crystal element,
• wherein the second liquid crystal element comprising a sensor electrode provided over the light-receiving element, the liquid crystal layer including the liquid crystal material and the polymer, and the counter electrode,
• wherein the first liquid crystal element and the second liquid crystal element are driven independently by being electrically independent the pixel electrode from the sensor electrode, and
• wherein the light-receiving element receives light transmitting through the second liquid crystal element.

A display device comprising:

• a pixel comprising a sensor circuit,
• wherein the sensor circuit comprises a light-receiving element converting light into an electric signal, a first transistor generating an output signal from the electric signal, a second transistor controlling reading of the output signal, and a liquid crystal element,
• wherein the liquid crystal element comprising a sensor electrode provided over the light-receiving element, a liquid crystal layer including a liquid crystal material and a polymer and a counter electrode,
• wherein the liquid crystal element is configured to control light reception in the light-receiving element, and
• wherein the light-receiving element receives light transmitting through the liquid crystal element.

A display device comprising:

• a pixel comprising a transistor over a substrate,
• a light-receiving element over the substrate,
• an insulating layer over the transistor and the light-receiving element,
• a pixel electrode on the insulating layer, the pixel electrode being electrically connected to the transistor,
• a sensor electrode on the insulating layer, the sensor electrode being overlapped with the light-receiving element and electrically independent from the pixel electrode, and
• a liquid crystal layer over the pixel electrode and the sensor electrode, the liquid crystal layer including a liquid crystal material and a polymer.

A display device including a pixel, the pixel comprising:

• a switch over a substrate,
• a light-receiving element over the substrate,
• an insulating layer over the switch and the light-receiving element,
• a first light transmitting electrode on the insulating layer, the first light transmitting electrode being electrically connected to the switch,
• a second light transmitting electrode on the insulating layer, the second light transmitting electrode being overlapped with the light-receiving element and electrically independent from the first light transmitting electrode, and
• a liquid crystal layer over the first light transmitting electrode and the second light transmitting electrode, the liquid crystal layer comprising a liquid crystal material and a polymer.