Pixel Circuitry Resetting Control for Flicker Suppression
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Solution Overview
Problem
In pixel circuitry, residual electric charges from a previous light-emitting stage can cause current leakage, leading to gradual increase in brightness values within a display period and resulting in flicker.
Innovation Solution
The pixel circuitry includes a resetting control circuitry that applies a first initial voltage to a connection node during the non-light-emitting stage, canceling out surplus electric charges and preventing brightness increase when the pixel circuitry enters the light-emitting stage again.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If residual electric charges remain in the parasitic capacitor at the first node during the non-light-emitting stage, then the pixel circuitry maintains the driving current for the light-emitting element, but current leakage occurs through the transistor of the first light-emission control circuitry causing brightness values to increase gradually and flicker to occur
Solution Approach 1:
The resetting control circuitry applies a first initial voltage to the connection node during the non-light-emitting stage before the next light-emitting stage begins. This preliminary action cancels out surplus electric charges that accumulated during the previous light-emitting stage, preventing current leakage and brightness increase before they can occur, thus maintaining display stability while preserving the light-emitting duration
2Reliability
If the first initial voltage is applied to the connection node during the non-light-emitting stage, then surplus electric charges are canceled out and brightness values remain consistent, but additional circuitry components are required
Solution Approach 1:
The resetting control circuitry is designed to share control lines and voltage ends with existing circuit components where possible. The first initial voltage end can be integrated with existing voltage supply structures, and the resetting control circuitry can utilize existing control line routing, thereby reducing the addition of completely new components and minimizing the increase in device complexity while still achieving reliable flicker suppression
Data Source
AI summary
A pixel circuitry, a pixel driving method and a display device are provided. The pixel circuitry includes a first light-emission control circuitry, a driving circuitry, a second light-emission control circuitry, a resetting control circuitry and a light-emitting element. The resetting control circuitry is electrically connected to a resetting control line, a connection node and a first initial voltage end for providing a first initial voltage, and configured to apply the first initial voltage to the connection node under the control of a resetting control signal from the resetting control line. The connection node is a first node, a third node or a fourth node. According to the present disclosure, it is able to suppress the occurrence of flicker.