Display Panel Driving Apparatus with Reordering Circuit for Power Reduction
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Solution Overview
Problem
In dual-gate amorphous-Si display panels, the frequent switching of colors for a single data line increases power consumption due to the need for the source driver to continuously change voltage levels, as each data line drives sub-pixels of different colors.
Innovation Solution
A driving apparatus with a reordering circuit that clusters sub-pixel data of the same color together, reducing the color switching number by rearranging the scanning sequence of the scan lines to drive the target data line with reordered sub-pixel voltage strings, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If each data line drives sub-pixels of different colors in dual-gate amorphous-Si display panels, then the display can show full-color images, but the source driver must continuously change voltage levels increasing power consumption
Solution Approach 1:
The patent segments the scanning process by dividing scan lines into different scanning orders based on the color of sub-pixels they drive. The reordering circuit separates the scanning of red, green, and blue sub-pixels into distinct time periods, allowing the source driver to maintain stable voltage levels for each color rather than continuously switching between them.
Solution Approach 2:
The patent applies preliminary action by pre-reordering the scan line sequence before data transmission. The reordering circuit rearranges the scanning order in advance based on sub-pixel color distribution, so that all sub-pixels of the same color are scanned contiguously. This preliminary reorganization enables the source driver to operate with stable voltage levels without frequent switching.
2Adaptability or versatility
If the source driver frequently switches color data for the same data line, then full-color display is achieved, but the color switching number increases leading to higher power consumption
Solution Approach 1:
The patent introduces dynamic scanning control where the scanning order is adaptively adjusted based on the color distribution of sub-pixels. The reordering circuit dynamically reorganizes the scan line sequence to group same-color sub-pixels together, making the scanning process dynamic rather than fixed, thereby reducing color switching events.
Solution Approach 2:
The patent implements periodic action by organizing the scanning of different color sub-pixels into distinct time periods. Each color group (red, green, blue) is scanned in a dedicated time window, creating a periodic scanning pattern that minimizes transitions between color voltage levels and reduces overall color switching frequency.
3Device complexity
If dual-gate amorphous-Si panel uses shared data lines for two sub-pixel columns, then the number of data lines is reduced, but each data line must drive sub-pixels of different colors increasing color switching
Solution Approach 1:
The patent merges the scanning of multiple scan lines into organized groups based on color criteria. By combining all red sub-pixel scanning, then all green, then all blue into sequential time periods, the system handles the complexity of shared data lines driving different colors through intelligent grouping and merging of scan operations.
Data Source
AI summary
This disclosure relates to techniques for a driving apparatus including a reordering circuit and a source driving circuit. The reordering circuit can be configured to reorder a plurality of sub-pixel data of an input data string to generate a reordered data string so as to reduce a color switching number associated with a target data line. The source driving circuit can be coupled to the reordering circuit to receive the reordered data string. The source driving circuit can be configured to drive the target data line of a display panel according to the reordered data string.