Display Driver Signal Control for FRC Grayscale Saturation
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Solution Overview
Problem
Frame rate control (FRC) technology in display apparatuses leads to grayscale saturation and image flickering due to a high number of frames and long calculation time, resulting in gridding and flickering issues during image display.
Innovation Solution
A system and method for driving displays that includes a data drive module and a signal control module with a color correspondence module to convert image data, a data processing module to divide bits, and a data construction module to perform table lookups for FRC patterns, reducing the number of frames and bits, and using a random FRC algorithm to remove lowest-order bits, thereby reducing grayscale saturation and flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional FRC technology uses 12-bit to 8-bit conversion with 4×4 space arrangement and 16 frames in time, then high grayscale display effect can be achieved, but the number of frames is large and calculation time is long, causing image flickers
Solution Approach 1:
The patent segments the 12-bit image data into high-order bits and low-order bits separately. The high-order bits undergo table lookup for grayscale conversion, while the low-order bits are processed through FRC algorithm. This segmentation allows independent optimization of grayscale precision and frame rate control, reducing overall calculation time while maintaining display quality.
Solution Approach 2:
The patent pre-calculates and stores grayscale conversion data in lookup tables during the design phase. During actual display operation, the system directly retrieves pre-computed values rather than performing real-time calculations, significantly reducing FRC processing time and eliminating image flickers.
2Manufacturing precision
If traditional FRC technology uses 12-bit to 8-bit conversion with 4×4 space arrangement and 16 frames in time, then high grayscale display effect can be achieved, but gridding phenomenon occurs due to grayscale saturation
Solution Approach 1:
By separating high-order and low-order bit processing, the patent applies different algorithms to each segment. The high-order bits use precise table lookup for accurate grayscale representation, while the low-order bits use FRC to distribute remaining values across multiple frames, preventing grayscale saturation and eliminating gridding artifacts.
Solution Approach 2:
The patent implements periodic FRC processing where low-order bit values are distributed across multiple display frames in a cyclic manner. This periodic distribution prevents any single frame from having excessive grayscale values that would cause saturation, thereby eliminating the gridding phenomenon while maintaining overall grayscale precision.
Data Source
AI summary
This application provides a system for driving a display, includes: a display panel; a data drive module, electrically connected to the display panel; and a signal control module, electrically connected to the data drive module. The signal control module includes: a color correspondence module, configured to receive image data of first bits, and convert the image data of first bits into image data of second bits; a data processing module, configured to divide the second bits into third bits and fourth bits; and a data construction module, according to a table lookup result, image data of which the number of frames and the number of bits are the same as those of data of the fourth bits, and sequentially providing the image data to the data drive module, so as to generate a corresponding data power supply for controlling the display panel to perform image display.