Display Device Interlaced Low-Speed Driving PSR
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Solution Overview
Problem
Display devices struggle to implement interlaced low-speed driving for video images synchronized with Panel Self Refresh (PSR) technology, resulting in display distortion and limited power consumption reduction.
Innovation Solution
A display device and method that dynamically switch between normal driving and interlaced low-speed driving based on frame frequency, using a timing controller to sense video formats and control the panel driving circuit to perform normal driving at a first frame frequency and interlaced low-speed driving at a second, lower frame frequency, thereby reducing power consumption while preventing display distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If interlaced low-speed driving is implemented for video images synchronized with PSR, then power consumption is reduced, but display distortion occurs due to data inconsistency
Solution Approach 1:
The patent implements dynamic switching between normal driving mode and interlaced low-speed driving mode based on the content characteristics of video frames. The system determines whether to apply interlaced driving on a per-frame basis, transitioning between different driving modes to balance power consumption and display quality, thereby resolving the contradiction between energy saving and display reliability.
Solution Approach 2:
The patent applies interlaced low-speed driving selectively to specific frames where it is beneficial, rather than uniformly to all frames. By identifying particular frames suitable for interlaced driving and applying the technique locally to those frames while maintaining normal driving for others, the system achieves power savings without introducing display distortion across the entire video sequence.
2Reliability
If normal driving is performed at the same frame frequency as input, then display quality is maintained, but power consumption cannot be reduced
Solution Approach 1:
The patent employs periodic interlaced low-speed driving at specific intervals within the video sequence, rather than continuous normal driving. By periodically switching to interlaced mode for selected frames while maintaining normal driving for others, the system reduces average power consumption while preserving overall display quality through selective application of the low-speed driving technique.
3Use of energy by stationary object
If interlaced low-speed driving is applied to all frames, then power consumption is minimized, but data inconsistency causes distortion in frames with different image data
Solution Approach 1:
The patent applies interlaced low-speed driving selectively to specific frames where it is beneficial, rather than uniformly to all frames. By identifying particular frames suitable for interlaced driving and applying the technique locally to those frames while maintaining normal driving for others, the system achieves power savings without introducing display distortion across the entire video sequence.
Solution Approach 2:
The patent changes the driving parameters (frame frequency, scanning pattern) dynamically based on frame content characteristics. By adjusting whether interlaced driving is applied on a per-frame basis according to the specific image data and its relationship with previous frames, the system optimizes the balance between power consumption and display consistency, avoiding distortion in frames with different image data.
Data Source
AI summary
A disclosed display device includes a display panel with a plurality of pixels and a plurality of signal lines respectively connected to the pixels, and a panel driving circuit to drive the signal lines. The display device further includes a timing controller to receive a first panel self-refresh (PSR) signal and an input image data from a host system, to sense whether the input image data has a preset video format based on the first PSR signal and, if the input image data is sensed to have the preset video format, to control the panel driving circuit to perform normal driving of the signal lines at a first frame frequency in a first group of frames and interlaced low-speed driving of the signal lines at a second frame frequency lower than the first frame frequency in a second group of frames to display the input image data.