Display Device Data Driver Shutdown for Unchanged Image Regions
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Solution Overview
Problem
Existing display devices consume excessive power when displaying identical image data in consecutive frames, as they continue to transfer and apply the same data voltages to pixels, leading to unnecessary power consumption.
Innovation Solution
A display device with a controller that detects identical data regions between consecutive frames and prevents the transfer of image data during these periods, disabling components of the data driver to reduce power consumption, including turning off the receiving and analog blocks, and applying a shut down mode data voltage to data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is transferred to the data driver in every frame period, then the display device ensures continuous image updating, but power consumption increases unnecessarily when image data remains identical
Solution Approach 1:
The system transitions from continuous periodic data transfer to conditional periodic transfer by introducing a detection mechanism that identifies when image data remains unchanged between frame periods, allowing the data driver to enter a low-power state during these periods while maintaining normal operation when changes occur
Solution Approach 2:
The detection unit enables the system to automatically identify identical image data periods and trigger the data driver to stop unnecessary data transfer operations, allowing the system to self-regulate power consumption based on actual content changes without external intervention
2Illumination intensity
If the data driver continuously provides data voltages to pixels, then the display maintains updated visual output, but energy is wasted when the same data voltages are applied repeatedly
Solution Approach 1:
Instead of completely stopping data transfer, the system applies partial action by maintaining data transfer only for regions where image changes are detected, while applying shut down mode voltage to regions with identical content, thus achieving energy savings without compromising overall display quality
Solution Approach 2:
The system changes the voltage parameter applied to data lines by switching from normal data voltages to shut down mode voltages during periods when image data is identical, fundamentally altering the electrical state to minimize energy consumption while preserving the ability to restore normal operation when content changes
Data Source
AI summary
A display device including: a display panel including a plurality of pixels; a data driver configured to provide data voltages to the plurality of pixels; and a controller configured to control the data driver, to detect a same data region of the display panel when first image data in a current frame period is the same as second image data in a previous frame period, and not to transfer the first image data to the data driver in the current frame period.