Display Panel Driving Method for Narrow White Line Color Cast
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Solution Overview
Problem
Existing display panels face issues with color cast phenomena when displaying narrow white lines due to inadequate backlight modulation, leading to unsatisfactory image quality, especially when viewed from different angles.
Innovation Solution
A driving method for a display panel that includes a dimming screen and a display screen, where the dimming screen performs backlight modulation based on a processed dimming picture. This method determines white and black dimming pixels, adjusts grayscale values of adjacent black dimming pixels adjacent to white dimming patterns, and uses specific expansion coefficients to prevent color cast by ensuring all pixels within the dimming pattern are adjusted to match the white level, thereby avoiding color discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional backlight modulation is used for displaying narrow white lines, then power consumption is reduced and basic display function is maintained, but color cast phenomenon occurs and image quality deteriorates when viewed from different angles
Solution Approach 1:
The patent applies local quality by differentiating the treatment of dimming pixels based on their spatial relationship to white dimming patterns. Adjacent black dimming pixels are identified and processed differently from isolated black pixels, with specific grayscale value adjustments applied only to pixels neighboring white patterns. This localized processing ensures that narrow white lines maintain consistent color appearance across viewing angles while avoiding unnecessary processing of other pixels, thus resolving the contradiction between power consumption and image quality consistency.
2Manufacturing precision
If grayscale values of adjacent black dimming pixels are adjusted to match white level, then color cast phenomenon is eliminated and image quality is improved, but processing complexity and computation time increase
Solution Approach 1:
The patent implements preliminary action by first identifying and marking all white dimming pixels and their adjacent black dimming pixels before performing grayscale value adjustments. The processing sequence is structured to first determine which pixels require adjustment, then apply the appropriate grayscale values in a systematic manner. This preliminary identification step simplifies the overall processing complexity by clearly defining the scope of adjustment needed, rather than attempting to process all pixels uniformly or through more complex algorithms.
Solution Approach 2:
The patent applies parameter changes by systematically adjusting the grayscale values of adjacent black dimming pixels based on their proximity to white dimming patterns. Specific grayscale parameters are assigned to different pixel types (white dimming pixels, adjacent black dimming pixels, and other black pixels) to achieve consistent white level appearance. This parameter-based approach provides a controlled and manageable method for improving color consistency without requiring overly complex processing logic.
3Ease of operation
If all black dimming pixels are processed uniformly, then processing is simplified, but color cast cannot be effectively prevented as adjacent pixels have different requirements
Solution Approach 1:
The patent resolves this contradiction by implementing local quality differentiation in the processing approach. Instead of uniform processing, it identifies adjacent black dimming pixels specifically and applies targeted grayscale adjustments only to those pixels neighboring white dimming patterns. This selective processing maintains reasonable simplicity while achieving accurate color results, as it focuses computational effort only where needed rather than applying complex algorithms to all pixels.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces or eliminates the color cast phenomenon, ensuring consistent image quality across different viewing angles by ensuring all pixels within the dimming pattern are adjusted to match the white level, thereby enhancing the display's overall performance and image fidelity.
Implementation Method 1
the dimming screen is provided at a backlight side of the display screen and is configured to perform backlight modulation on the display screen
Data Source
AI summary
A driving method of a display panel, a driving device, a display device, and a storage medium are provided. The driving method of the display panel includes: obtaining an input image that is to be displayed; determining a display picture corresponding to the plurality of display pixels of the display screen according to the input image; determining a first dimming picture corresponding to the plurality of dimming pixels of the dimming screen according to the input image, and processing the first dimming picture to obtain a second dimming picture; providing the display picture to make the dimming screen perform backlight modulation on the display screen according to the second dimming picture, and providing the second dimming picture to make the display screen display the input image according to the display picture.