Display Driver IC Source Amplifier Segmentation for Power Reduction
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Solution Overview
Problem
Conventional electronic devices with displays face challenges in reducing power consumption, particularly when battery power is limited, as the display's power consumption is a significant portion of the device's overall power usage.
Innovation Solution
An electronic device with a display driving method that adapts power usage based on display configuration, using a display driver integrated circuit (DDI) to selectively connect source amplifiers with source line groups and control their activation/deactivation based on the display configuration, thereby reducing power consumption while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If all source amplifiers are continuously activated to maintain display functionality, then image quality is preserved, but power consumption increases
Solution Approach 1:
The display panel's source lines are divided into multiple groups, with each group connected to a different source amplifier. The controller selectively activates only the source amplifiers corresponding to currently displayed content regions, while deactivating others. This segmentation allows the system to maintain display functionality for active regions while reducing power consumption by leaving inactive regions dormant.
Solution Approach 2:
The system dynamically adjusts the activation state of source amplifiers based on real-time display configuration information. The controller receives updates about which regions are currently displaying content and accordingly turns on or off the corresponding source amplifiers. This dynamic adaptation ensures that power consumption is optimized without compromising the reliability of displayed content.
2Use of energy by moving object
If source amplifiers are deactivated to reduce power consumption, then energy usage decreases, but display coverage is reduced
Solution Approach 1:
Different source amplifiers serve different spatial regions of the display panel. The controller identifies which specific regions contain active content and activates only the corresponding local source amplifiers. This local quality approach ensures that power is consumed only where needed, maintaining full display coverage for active content while avoiding unnecessary power usage in inactive regions.
Solution Approach 2:
Instead of activating all source amplifiers uniformly, the system applies partial action by activating only the subset of amplifiers needed for current content display. The controller determines the minimum necessary activation level based on display configuration, avoiding excessive power consumption while ensuring adequate display coverage for all active content regions.
3Illumination intensity
If the display operates at high power to maintain image quality, then visual performance is preserved, but battery life is reduced
Solution Approach 1:
The controller periodically updates the activation state of source amplifiers based on changing display configuration information. As content moves or changes across the display, the system periodically reconfigures which amplifiers are active, ensuring that image quality is maintained for current content while minimizing power consumption. This periodic adaptation extends battery life without sacrificing visual performance.
Solution Approach 2:
The system changes operational parameters of source amplifiers (activation/deactivation states) based on display configuration. By dynamically adjusting these parameters according to which regions are actively displaying content, the system maintains high image quality where needed while reducing overall power consumption, thereby extending battery duration.
Data Source
AI summary
An electronic device is provided that includes a display panel including a plurality of source line groups including a plurality of source lines and a plurality of panel switches for each of the plurality of source lines; and a display driver integrated circuit (DDI) configured to drive the display panel, wherein the DDI includes the plurality of source amplifiers, decoders respectively connected to the plurality of source amplifiers, and at least one switch between source amplifier channels, wherein an operation of the at least one switch causes the number of the source line groups corresponding to a source amplifier to be changed.