Display Panel Black Frame Timing to Reduce Image Drag
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Solution Overview
Problem
Dynamic screen switching in display panels often leads to image drag, causing display panel flicker.
Innovation Solution
A display panel design incorporating pixel driving circuits with specific switching units and gate driving circuits that include shift register units, outputting active level pulses during data writing, black frame insertion, and sensing stages to mitigate image drag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic screen switching is implemented in display panel, then display functionality is improved, but image drag occurs causing display panel flicker
Solution Approach 1:
The patent applies preliminary action by inserting a black frame between adjacent light-emitting stages. This black frame is prepared and positioned in advance to prevent image drag from the previous frame, thereby eliminating flicker during dynamic screen switching while maintaining display functionality.
2Reliability
If black frame insertion stage is added between light-emitting stages, then image drag is reduced, but driving cycle complexity increases
Solution Approach 1:
The patent implements periodic action by structuring the driving cycle to include data writing stage, multiple light-emitting stages, and black frame insertion stages in a repeating sequence. This periodic structure systematically addresses image drag at regular intervals without requiring complex ad-hoc control mechanisms.
3Measurement precision
If first switching unit is added to electrically connect third node and sensing signal terminal, then sensing capability is improved, but pixel circuit complexity increases
Solution Approach 1:
The patent applies self-service by enabling the pixel driving circuit to perform its own sensing operations through the first switching unit. The circuit uses its own components (first switching unit, sensing signal terminal) to detect and compensate for threshold voltage changes, eliminating the need for separate external sensing circuits.
Data Source
AI summary
Provided are a display panel, a driving method therefor and a display device. The display panel includes pixel driving circuits and a first gate driving circuit. The pixel driving circuit includes a driving circuit connected to first to third nodes for inputting a driving current to the third node through the second node, and a first switching unit having a first terminal connected to the third node and a second terminal connected to a sensing signal terminal for electrically connecting, in response to a signal at a control terminal thereof, the third node and sensing signal terminal. The first gate driving circuit includes a first output terminal corresponding to the pixel driving circuit and connected to the control terminal. The first output terminal outputs an active level pulse during data writing stage and black frame insertion stage of a driving cycle of the pixel driving circuit corresponding thereto.