US 2025/0061833 A1 · DISPLAY DEVICE AND ELECTRONIC DEVICE

Abstract

A display device whose change in chromaticity is small and grayscale controllability is high is provided. The display device can turn on and turn off a light-emitting device by PAM and PWM control (a pulse width control involving changes in amplitude). The display device writes the same input signal (data potential) to a first node and a second node to turn on the light-emitting device in accordance with a potential of the first node and generate a pulse signal in accordance with a potential of the second node. The potential of the first node can be reset in accordance with the generated pulse signal. Therefore, the light-emitting device can emit light for a desired period with a desired emission intensity.

Claims11

Dependent claims

A display device comprising a pulse signal generation portion, a light-emitting device, a first node, and a second node in a pixel,

wherein the first node is electrically connected to an input portion of the pulse signal generation portion,
wherein the second node is electrically connected to an output portion of the pulse signal generation portion,
wherein the first node and the second node are electrically connected to each other through a transistor,
wherein the pixel makes the light-emitting device emit light in accordance with a data potential input to the second node,
wherein the pulse signal generation portion generates a pulse signal in accordance with the data potential input to the first node, and
wherein the pixel resets a potential of the second node in accordance with the pulse signal and makes the light-emitting device turn off.

3 more elements

A display device comprising a pulse signal generation portion, a first node, a second node, a first transistor, a second transistor, a third transistor, a first capacitor, and a light-emitting device in a pixel,

wherein the first node is electrically connected to one of a source and a drain of the first transistor, one of a source and a drain of the second transistor, and an input portion of the pulse signal generation portion,
wherein the second node is electrically connected to the other of the source and the drain of the second transistor, a gate of the third transistor, one electrode of the first capacitor, and an output portion of the pulse signal generation portion,
wherein one of a source and a drain of the third transistor is electrically connected to one electrode of the light-emitting device, and
wherein the other of the source and the drain of the third transistor is electrically connected to the other electrode of the first capacitor.

1 more element

Dependencies are inferred from the claim text.

Display device and electronic device

Life of this patent

Display device and electronic device

Life of this patent

Abstract

Claims11