Display Controller Timing and Frequency Adjustment
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Solution Overview
Problem
Display devices face challenges in improving the charging rate of display panels, particularly due to limitations in adjusting image signal resolutions and frame frequencies, which affect the gate-on period of pixel lines.
Innovation Solution
A display device with a controller that includes a timing changing unit to adjust image signal pixel size to panel pixel size and a frequency changing unit to reduce frame frequency, thereby increasing the gate-on period and improving charging rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image signal resolution is adjusted to match panel pixel size, then the display compatibility is improved, but the charging rate of the display panel deteriorates
Solution Approach 1:
The patent applies dynamics by making the frame frequency adjustable rather than fixed. The controller dynamically changes the frame frequency of the image signal to match the charging capabilities of the display panel, allowing the system to adapt between compatibility mode (standard frame frequencies) and performance mode (reduced frame frequencies for faster charging).
Solution Approach 2:
The patent changes the frame frequency parameter of the image signal from its original value to a reduced value that matches the panel's charging rate. By modifying this temporal parameter rather than spatial resolution, the system achieves faster charging while maintaining display compatibility through software-based scaling.
2Productivity
If the frame frequency is reduced to increase gate-on period, then the charging rate is improved, but the display refresh performance deteriorates
Solution Approach 1:
The system dynamically adjusts frame frequency based on operational mode. During charging operations, the frame frequency is reduced to extend the gate-on period and improve charging rate. During normal display operations, the frame frequency returns to standard values to maintain refresh performance. This dynamic switching resolves the contradiction between charging speed and display refresh rate.
3Productivity
If the gate-on period is increased to improve charging rate, then the pixel line charging efficiency is improved, but the active period duration increases causing potential timing conflicts
Solution Approach 1:
The patent changes the frame frequency parameter to indirectly control the gate-on period duration. By reducing the frame frequency, the time available for each frame increases, which allows for a longer gate-on period within the active period. This parameter change achieves faster charging while the controller manages timing to prevent conflicts with other display operations.
Data Source
AI summary
A display device includes a display panel which includes pixels arranged in a matrix form and a controller which receives a first image signal corresponding to a first active period of a first frame, outputs a first final output signal corresponding to a first conversion active period of the first frame, and drives the display panel based on the first final image signal. The controller includes a timing changing unit which receives the first image signal and changes a first image signal pixel size corresponding to the first image signal to a panel pixel size corresponding to the display panel to generate the first output signal, and a frequency changing unit which receives the first output signal from the timing changing unit and reduces a frame frequency of the first output signal based on the first image signal to output the first final output signal.