Display Panel Feedback Lines for Charging Time Compensation
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Solution Overview
Problem
The increasing resolution and refresh rate of display panels lead to uneven pixel charging times due to resistive and capacitive load differences, resulting in inconsistent display brightness and potential color casts.
Innovation Solution
A display panel with a control module connected to feedback lines that detect turn-on times of pixel units in different areas and adjust data signal output times to equalize charging times across the panel, using a timing controller and microprocessor to synchronize data signal delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the refresh rate of the panel is increased, then the panel charging time is shortened, but the resistive and capacitive load increases causing uneven pixel charging time
Solution Approach 1:
The pixel array is divided into multiple pixel areas, with feedback lines distributed across different regions. This segmentation allows independent detection and compensation of turn-on time variations in different areas, addressing the uneven charging caused by increased refresh rates and load.
Solution Approach 2:
Feedback lines are introduced to detect the turn-on time of pixel units in different areas. The control module uses this feedback information to calculate time differences and adjust data signal output timing, creating a closed-loop system that compensates for charging inconsistencies caused by resistive and capacitive load variations.
2Manufacturing precision
If the resolution requirements are improved, then the display quality is enhanced, but the resistive and capacitive load increases causing scan signal transmission delay
Solution Approach 1:
Feedback lines detect the actual turn-on time of pixels, providing information about scan signal transmission delays caused by increased resolution and load. The control module uses this feedback to calculate compensation times and adjust data signal timing, offsetting the delays introduced by higher resolution requirements.
Solution Approach 2:
The control module pre-calculates compensation times based on feedback information and adjusts data signal output timing in advance. This preliminary adjustment ensures that pixels at different distances from the gate driver receive data signals at appropriately timed moments, compensating for transmission delays before they affect display performance.
3Quantity of substance
If the panel has large resistance and capacitance load, then more pixels can be driven, but transmission delay increases leading to inconsistent pixel charging time
Solution Approach 1:
Feedback lines are distributed across different pixel areas in a spatial arrangement, adding a dimensional aspect to the detection system. This allows simultaneous monitoring of turn-on times across multiple regions, enabling the system to handle larger numbers of pixels while compensating for transmission delays through multi-point feedback.
Solution Approach 2:
Multiple feedback lines distributed across different pixel areas provide comprehensive feedback on charging timing. The control module processes this feedback to determine time differences between areas and adjusts data signal output timing accordingly, ensuring consistent charging times across a large number of pixels despite increased load.
Data Source
AI summary
A display panel, a driving method, and a display device are disclosed. The display panel includes a plurality of pixel units, a gate driver, a source driver, a plurality of feedback lines, and a control module. The display panel is provided with the plurality of feedback lines electrically connected to the gate driver and the control module, such that the control module can detect turn-on time of the pixel units respectively located in at least two pixel areas through the plurality of feedback lines and adjust time when the source driver outputs data signals according to the turn-on time. This solves an issue of uneven display brightness due to inconsistent pixel charging time in the prior art.