Display Frame Rate Conversion for Polarity Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses face image quality degradation due to differences between varying input frame rates and fixed refresh rates, leading to potential imbalances in polarity that can cause direct current components to be superposed on liquid crystal devices.
Innovation Solution
A display apparatus with a conversion unit that sets and converts frame rates of input signals to ensure equal output frame periods for alternating polarity frames, thereby maintaining balanced operation and reducing image quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display apparatus receives video signals with dynamically varying frame rates to adapt to host device performance, then adaptability is improved, but image quality degradation occurs due to imbalance between alternating polarities
Solution Approach 1:
The patent applies dynamics by making the frame rate conversion adaptive rather than fixed. The conversion unit dynamically adjusts the output frame period based on the input frame rate while maintaining a fixed relationship with the display refresh rate. This allows the system to adapt to varying host device performance while preserving the balanced polarity operation required for image quality.
Solution Approach 2:
The patent changes the frame period parameter to resolve the contradiction. By converting the variable input frame rate into a controlled output frame period that maintains a fixed relationship with the display refresh rate, the system adapts to different frame rates while preventing polarity imbalance. The conversion unit adjusts the frame period parameter dynamically to ensure that alternating polarity frames remain balanced.
2Ease of operation
If frames are output with alternating polarities to drive liquid crystal devices, then display function is achieved, but direct current components are superposed when frame periods are unequal
Solution Approach 1:
The patent applies preliminary anti-action by pre-converting the frame rates before display output. The conversion unit proactively adjusts the output frame periods to ensure equality before the alternating polarity frames are sent to the display unit. This preliminary adjustment prevents the harmful direct current component superposition from occurring in the first place, rather than attempting to correct it afterward.
Solution Approach 2:
The conversion unit acts as an intermediary between the variable frame rate input and the fixed refresh rate display. It mediates the frame rate differences by converting them into equal output frame periods, ensuring that the alternating polarity frames maintain balance. This intermediary function prevents the direct current component issue while preserving the alternating polarity display operation.
3Productivity
If frame rates are individually set for each frame according to host device performance, then productivity is improved, but frame period imbalance occurs between alternating polarity frames
Solution Approach 1:
The patent applies segmentation by separating the frame rate conversion into individual frame processing while maintaining overall balance. The conversion unit processes each frame's rate individually based on host device performance, then adjusts each output frame period to maintain equality with alternating polarity frames. This segmented approach preserves productivity benefits while ensuring stability through individual frame period adjustment.
Solution Approach 2:
The conversion unit serves multiple functions: it adapts to varying frame rates from the host device, converts variable frame periods into equal output frame periods, and maintains the balance required for alternating polarity display. This multi-functional approach allows the system to process frames with individually set rates while preserving the stability of frame period balance across all alternating polarity frames.
Data Source
AI summary
A display apparatus includes a conversion unit, and an output unit. The conversion unit receives an input signal in which frame rates are respectively set for frames, individually sets received frames of the input signal as a first frame to be output with a first polarity or a second frame to be output with a second polarity opposite to the first polarity, and converts the frame rates of the first frames and the frame rates of the second frames so that the first frame period taken to output the first frames and the second frame period taken to output the second frames are equal within a predetermined time period. The output unit outputs the first frames with the first polarity to a display unit, and outputs the second frames with the second polarity to the display unit.