Display Device Timing Control for Single-Side Driver
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display devices using the single side driving method, the non-uniform RC load across scan lines leads to desynchronization of scan and data signal timings, causing deviations in data charging rates and deteriorating display quality due to varying lengths of scan lines and distances from drivers to pixels.
Innovation Solution
A controller is used to adjust the output timing of data signals based on the load of scan and data signals, considering the positions of pixels and distances from drivers, by generating timing control signals that include delay values stored in a look-up table, allowing for adaptive timing control to synchronize signal supply across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If scan driver and data driver are disposed together on one side to implement narrow bezel, then device complexity is reduced and bezel width is minimized, but scan lines have different lengths causing non-uniform RC load and timing desynchronization
Solution Approach 1:
The controller performs preliminary calculation of RC loads for each scan line and data line, and pre-determines the delay values needed for data signals before actual display operation. This advance preparation allows the system to compensate for timing differences caused by non-uniform scan line lengths, ensuring synchronized signal arrival at pixels despite the single-side driver arrangement.
Solution Approach 2:
The system dynamically adjusts the output timing parameter of data signals based on calculated RC loads. By changing the timing parameter (adding variable delays) according to the specific RC load characteristics of each pixel location, the system compensates for the non-uniform scan line lengths and achieves timing synchronization across all pixels.
2Length of stationary object
If scan lines have different lengths due to single side driving structure, then narrow bezel is achieved, but RC load becomes non-uniform causing deviation in data charging rate
Solution Approach 1:
The controller applies different delay values to data signals destined for different pixel locations, creating local quality variations in signal timing. Each pixel receives a customized delay adjustment based on its specific RC load characteristics, ensuring that despite non-uniform scan line lengths, all pixels achieve consistent data charging rates.
3Manufacturing precision
If timing control is applied to synchronize data and scan signals, then display quality is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The controller performs multiple functions: it drives both the scan driver and data driver, calculates RC loads for all scan and data lines, determines appropriate delay values, and generates timing control signals. By consolidating these functions in a single controller, the system achieves timing synchronization without proportionally increasing overall device complexity.
Solution Approach 2:
The controller automatically calculates RC loads and determines delay values based on the known physical characteristics of the display panel and driver locations. This self-service approach eliminates the need for external calibration or manual adjustment mechanisms, achieving timing synchronization through automated internal processing.
Data Source
AI summary
A display device of the present invention includes a pixel unit including a plurality of pixels connected to data lines and scan lines; a data driver disposed on one side of the pixel unit to drive the data lines; a scan driver disposed on the one side of the pixel unit together with the data driver to drive the scan lines; and a controller which controls an output timing of a data signal in units of pixel columns and units of pixel rows based on a load of a scan signal supplied to the scan lines and a load of the data signal supplied to the data lines.