Source Driver Color Swapping Tagging
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Solution Overview
Problem
Current color swapping techniques for OLED display panels are complex and increase chip area and circuit complexity due to the need for multiple gamma voltage adjustments across various panel types and orientations, leading to potential errors and inefficiencies.
Innovation Solution
A source driver and method that adds a tag to each sub-pixel data to indicate color information, allowing for selective gamma voltage adjustment post-color swapping, thereby simplifying the process and reducing circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional color swapping techniques are used for OLED display panels, then color correction can be achieved, but chip area and circuit complexity increase significantly
Solution Approach 1:
The patent extracts the color swapping logic from the analog circuit domain and relocates it to the digital processing domain. By implementing color swapping through digital data processing rather than analog circuit manipulation, the complexity of the analog circuit is significantly reduced while maintaining color correction accuracy. The digital processor handles the color swapping algorithms, leaving the analog circuit to focus only on signal amplification and output.
Solution Approach 2:
The patent creates a universal color swapping solution that can handle multiple panel types (OLED, LCD, Mini LED), various panel orientations (normal, flipped horizontally, flipped vertically), and different PenTile architectures through a single digital processing module. This multi-functional digital processor replaces the need for separate dedicated circuits for each panel type and orientation, thereby reducing overall circuit complexity while maintaining comprehensive color correction capability.
2Reliability
If multiple gamma voltage adjustments are implemented for different panel types and orientations, then color accuracy is maintained, but chip area increases
Solution Approach 1:
The patent segments the color correction process into distinct digital processing steps (color swapping based on panel type, orientation detection, gamma voltage selection) that can be executed sequentially by a digital processor. This segmentation allows comprehensive color correction for multiple panel types and orientations without requiring parallel dedicated circuits for each case, thereby reducing chip area while maintaining color accuracy through systematic digital processing.
3Measurement precision
If dedicated color swapping circuits are designed for each panel type, then color correction precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a digital processor as an intermediary between the display panel and the analog amplifier circuit. This digital intermediary handles all color swapping and correction calculations, translating various panel types and orientations into standardized correction parameters. The analog circuit then receives pre-processed signals requiring minimal additional processing, thereby maintaining color correction precision while significantly reducing analog circuit complexity.
Data Source
AI summary
A source driver and a method for color swapping are provided. The source driver includes: a processor configured to: obtain, from an application processor, a plurality of sub-pixel data, add a tag to each of the plurality of sub-pixel data to generate a plurality of new sub-pixel data, the tag indicating color information of the sub-pixel data, and perform color swapping on the plurality of new sub-pixel data; a multiplexer circuit communicatively coupled to the processor and configured to: obtain each of the plurality of color swapped new sub-pixel data in sequence, and select a corresponding gamma voltage according to the tag of the color swapped new sub-pixel data; and an analog amplifier circuit communicatively coupled to the multiplexer circuit and configured to provide a source driving signal to a corresponding sub-pixel in a pixel array according to the color swapped new sub-pixel data and the corresponding gamma voltage.