Display Timing Controller Adjusting Porch Periods for Luminance
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Solution Overview
Problem
Existing display devices face challenges in maintaining consistent display quality due to variations in frame periods, leading to inconsistent image luminance during precise image processing.
Innovation Solution
A display device and method that adjust the lengths of front porch and back porch periods within frame periods while maintaining equal blank periods, allowing for flexible cycle changes in the vertical synchronization signal to ensure consistent image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frame period of the display device is changed for precise image processing, then image processing flexibility is improved, but display quality becomes inconsistent due to varying blank periods
Solution Approach 1:
The patent applies dynamics by making the porch periods (front porch and back porch) adjustable and variable. The timing controller dynamically changes the lengths of front porch and back porch periods based on the frame period requirements, allowing the display device to adapt to different frame periods while maintaining consistent blank period lengths, thus resolving the contradiction between frame period flexibility and display quality consistency
Solution Approach 2:
The patent changes the parameters of the porch periods (front porch period length and back porch period length) to maintain constant blank period lengths. By adjusting these parameters according to different frame periods, the system achieves both flexible frame period changes and consistent display quality, as the blank periods remain equal across different driving modes
2Stability of the object's composition
If the vertical synchronization signal is supplied in constant cycle, then display stability is improved, but frame period flexibility is limited
Solution Approach 1:
The patent makes the vertical synchronization signal cycle dynamic rather than fixed. The timing controller adjusts the cycle of the vertical synchronization signal based on the required frame period, enabling the display device to operate in different driving modes (first driving mode with constant cycle and second driving mode with variable cycle) while maintaining display stability through controlled porch period adjustments
3Adaptability or versatility
If the blank period length varies with frame period changes, then frame period flexibility is improved, but image luminance consistency deteriorates
Solution Approach 1:
The patent changes the parameters of the porch periods (front porch and back porch) to compensate for frame period variations. By adjusting these parameters, the system maintains equal blank period lengths across different frame periods, ensuring consistent image luminance while allowing flexible frame period changes for different display requirements
Data Source
AI summary
A display device includes a display unit which includes pixels and displays an image, a data driver which supplies a data signal to the pixels, and a timing controller which controls the data driver using a timing control signal. Here, the timing control signal may include a vertical synchronization signal for defining a frame period and a data enable signal for defining a display period during which an image is displayed and a blank period during which an image is not displayed. Here, lengths of blank periods may be equal to each other in a first driving mode in which the vertical synchronization signal is supplied to the timing controller in a constant cycle and in a second driving mode in which the vertical synchronization signal is supplied in different cycles.