Display Panel Multi-Frequency Driving Controller
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while maintaining display quality, especially when handling multiple images simultaneously, as existing technologies struggle to efficiently manage different image types and their respective driving frequencies.
Innovation Solution
A display device with a driving controller that adjusts operation modes based on input signals to drive different regions at specific frequencies, switching to compensation modes when necessary to reduce power consumption and prevent display quality degradation, by determining operation modes and generating appropriate scan signals to manage the driving frequencies of data and scan lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device drives all regions at a reduced frequency to save power, then power consumption is reduced, but display quality degrades due to afterimage and luminance differences
Solution Approach 1:
The display panel is divided into multiple display regions (first display region and second display region) that can be driven at different frequencies independently. The controller selectively applies different driving frequencies to different regions based on the type of image content being displayed in each region, allowing power-saving low-frequency operation for static content while maintaining high-frequency operation for dynamic content to prevent display quality issues.
Solution Approach 2:
Different driving frequencies are applied to different spatial regions of the display panel based on local content requirements. Regions displaying still images or text can operate at lower frequencies for power savings, while regions displaying moving images maintain higher frequencies to prevent afterimage and luminance degradation, achieving localized optimization of both power consumption and display quality.
2Reliability
If the display device drives all regions at a high frequency to maintain display quality, then display quality is maintained, but power consumption increases
Solution Approach 1:
The driving frequency of each display region is dynamically adjusted based on the type of image content being displayed. The controller continuously monitors image content characteristics and adapts the driving frequency in real-time, switching between high frequency (for moving images to maintain quality) and low frequency (for still images to save power), achieving adaptive optimization of the power-quality tradeoff.
Solution Approach 2:
The display device periodically evaluates image content in each region and adjusts driving frequencies accordingly. By implementing periodic content analysis and frequency adjustment, the system can maintain high display quality when needed while achieving power savings during periods when static content is displayed, balancing overall power consumption and display quality over time.
3Use of energy by moving object
If the display device uses multi-frequency driving mode to reduce power consumption, then power consumption is reduced, but afterimage deviation occurs between regions after prolonged operation
Solution Approach 1:
The controller monitors the duration of multi-frequency driving mode operation and proactively switches to compensation mode before significant afterimage deviation occurs. By detecting prolonged operation in multi-frequency mode and preemptively applying compensation measures (such as adjusting driving frequencies or applying compensation signals), the system prevents luminance uniformity degradation rather than correcting it after the fact.
Solution Approach 2:
The display device implements a feedback mechanism that monitors operation duration and luminance characteristics of different regions. Based on this feedback, the controller determines when to switch from multi-frequency driving mode to compensation mode, adjusting driving parameters to correct or prevent afterimage deviation and maintain luminance uniformity across regions after prolonged differential operation.
Data Source
AI summary
Provided is a display device including a display panel, a data driving circuit configured to drive a plurality of data lines, a scan driving circuit configured to drive a plurality of scan lines, and a driving controller configured to determine an operation mode based on an input signal, and configured to control the data driving circuit and the scan driving circuit in order to drive a first display region of the display panel at a first driving frequency and drive a second display region of the display panel at a second driving frequency while the operation mode is a multi-frequency mode, wherein the driving controller may change the operation mode to a compensation mode in which the second display region is periodically driven at the first driving frequency when the duration of the multi-frequency mode is greater than a reference time.