Display Panel Spatial Rendering for Low-Grayscale PWM Uniformity
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Solution Overview
Problem
Existing display panels face issues with power consumption, display uniformity, and image expression reliability, particularly in Micro-LED display panels using pulse width modulation (PWM) due to brightness distortion and uncontrollable light-emitting durations at low grayscales.
Innovation Solution
A rendering method that adjusts pixel data by increasing the light-emitting duration of pixels with initial grayscales less than a preset value, converting them to rendered grayscales greater than the preset value, and maintaining a balance of 0 grayscales to achieve ideal brightness through spatially rendered regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If pulse width modulation (PWM) is used to drive display panel, then power consumption can be controlled, but brightness distortion and uncontrollable light-emitting durations occur at low grayscales
Solution Approach 1:
The patent changes the grayscale parameter distribution by converting low grayscale values (≤preset value) to high grayscale values (>preset value) through spatial rendering, while maintaining the overall brightness through coordinated pixel adjustments. This parameter transformation resolves the PWM control issue at low grayscales.
Solution Approach 2:
The patent introduces a spatial dimension to grayscale rendering by creating spatially rendered regions where pixels are coordinated to achieve the desired brightness effect. Instead of adjusting individual pixel grayscale values directly, the solution operates in the spatial domain by grouping and coordinating multiple pixels.
2Device complexity
If traditional rendering methods are used, then processing is simple, but display uniformity and image quality deteriorate
Solution Approach 1:
The patent applies different rendering strategies to different spatial regions: pixels within spatially rendered regions undergo grayscale transformation, while pixels outside these regions maintain their original characteristics. This local differentiation achieves display uniformity without requiring complex global processing.
3Use of energy by moving object
If low grayscale values are used to reduce power consumption, then brightness distortion occurs and display uniformity deteriorates
Solution Approach 1:
The patent transforms the grayscale parameter distribution by converting low grayscale values to high grayscale values through spatial rendering coordination. This parameter change allows the system to maintain higher brightness uniformity while still achieving power consumption reduction through the spatial rendering mechanism.
Data Source
AI summary
Provided are a rendering method for a display panel, a display panel and a display device. The display panel includes pixels. The rendering method includes: determining a to-be-rendered pixel data group according to image data of a to-be-displayed image, where the to-be-rendered pixel data group includes initial grayscales respectively corresponding to a plurality of pixels, and a reference grayscale of the to-be-rendered pixel data group is smaller than or equal to a first preset value; and obtaining a corresponding spatially rendered pixel data group based on the initial grayscales in the to-be-rendered pixel data group, where the spatially rendered pixel data group includes rendered grayscales respectively corresponding to the plurality of pixels, and each rendered grayscale other than the 0 grayscale in the spatially rendered pixel data group is greater than the first preset value.