Active matrix-type display device
AssigneeGlobal OLED Technology LLC
InventorShinya Ono
Life of this patent
Estimating the term…
Abstract
When performing gradation expression using a time division driving method, an operational frequency of a driving circuit is suppressed, and non-light emitting time is eliminated to increase the light emitting time. Each of a number of pixel circuits includes a light emitting element, a driver element for turning on or off a driving current of the light emitting element, a switching element for controlling connection of a gate electrode of the driver element with a signal line, and a capacitance to which a signal voltage supplied from the signal line to the gate electrode of the driver element is written.
Claims8
An active matrix-type display device having a pixel circuit for each of a number of pixels arranged in matrix to control the light-emitting period, wherein,
- each pixel circuit includes:
- a light emitting element which emits light in response to a driving current,
- a driver element for controlling the driving current supplied to the light emitting element,
- a capacitance in which a signal voltage is written from a signal line for applying a voltage corresponding to the written signal voltage to the gate of the driver element, and
- a gate potential control line for shifting the potential of the capacitance to control the gate potential of the driver element, wherein,
- one frame is divided into a plurality of subframes, and in each of the subframes, at least three stages of signal voltage are written in the capacitance from the signal line, and
- in one subframe, after the signal voltage is written in, the subframe is further divided to form sub-subframes by changing the gate potential of the driver element by the gate potential control line for controlling the gate electrode voltage of the driver element in the sub-subframe by combining the signal voltage and the voltage of the gate potential control line to control a light emitting period of the light emitting element.
Dependencies are inferred from the claim text.