Display Region Frequency Control for Always-On Power Reduction
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Solution Overview
Problem
Display apparatuses with static images or always-on modes face high power consumption due to inefficient driving frequency management.
Innovation Solution
Implementing a display apparatus with multiple divisions of driving frequency, controlled by a block control driver that receives block control data sequentially and outputs block control signals in parallel, allowing independent frequency determination for different display regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel operates in always-on mode or displays static images, then the driving frequency must be maintained to ensure image quality, but this results in high power consumption
Solution Approach 1:
The display panel is divided into multiple display regions (first display region and second display region), each capable of operating at different driving frequencies. The block control driver receives block control data sequentially and outputs block control signals in parallel to independently control the driving frequency of each region, allowing high-frequency operation for dynamic content and low-frequency operation for static content, thereby reducing overall power consumption while maintaining image quality where needed.
2Device complexity
If a single driving frequency is used for the entire display panel, then the control system is simple, but it cannot optimize power consumption for different display regions
Solution Approach 1:
The block control driver is designed to dynamically adjust the driving frequency of different display regions based on the type of content being displayed. When static images are detected in certain regions, the driver reduces the driving frequency for those specific regions while maintaining normal frequency in other regions, enabling adaptive power management without requiring complete system redesign.
3Use of energy by moving object
If the driving frequency is reduced for static images, then power consumption decreases, but this may cause display artifacts or image quality degradation
Solution Approach 1:
Different driving frequencies are applied to different display regions based on the local content characteristics. Regions displaying static images operate at reduced frequencies to save power, while regions displaying dynamic content maintain normal operating frequencies to preserve image quality and prevent display artifacts, achieving localized optimization without compromising overall display performance.
Data Source
AI summary
A display apparatus includes a display panel including a first display region and a second display region, a gate emission driver which outputs gate signals to the display panel, a data driver which applies a data voltage to the display panel and a block control driver which outputs block control signals to the display panel based on block control data. A driving frequency of the first display region is determined independently of a driving frequency of the second display region based on the block control signals. The block control driver receives the block control data sequentially, and outputs the block control signals in parallel.