Display Data Processing for Dual-Screen Local Dimming Noise Reduction
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Solution Overview
Problem
In high-precision liquid crystal display panels with dual screens for local dimming, excessive dark-field noise occurs due to light leakage, causing significant brightness differences even at identical display screen gray-scale values, especially in low gray-scale regions where human sensitivity is higher.
Innovation Solution
A display data processing method that involves a dimming screen with dimming pixels configured for backlight modulation, using a noise reduction function to determine gray-scale values for dimming pixels based on input gray-scale values from the display screen, reducing noise and maintaining detail in low gray-scale areas by adjusting the dimming pixel's gray-scale values through specific mathematical operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dual-screen local dimming is implemented to improve contrast, then contrast ratio is improved, but dark-field noise increases due to light leakage
Solution Approach 1:
The patent applies parameter changes by using a noise reduction function with adjustable parameters (A and B) to transform the gray-scale values. By modifying the function parameters, the system can control the degree of noise reduction while preserving the contrast improvement benefits of dual-screen local dimming.
Solution Approach 2:
The patent converts the harmful light leakage effect into a benefit by using the noise reduction function to process the gray-scale values. The function is specifically designed to reduce the impact of light leakage in low gray-scale regions while maintaining the overall contrast enhancement achieved by the dual-screen structure.
2Object-generated harmful factors
If gray-scale values are reduced in low gray-scale regions to minimize light leakage, then dark-field noise is reduced, but display details are lost
Solution Approach 1:
The patent uses parameter changes in the noise reduction function to achieve selective noise reduction. The function parameters are optimized to reduce noise in low gray-scale regions while preserving the detail information, thus avoiding loss of display details while minimizing dark-field noise.
Solution Approach 2:
The patent applies local quality by using the noise reduction function that operates differently on different gray-scale regions. The function specifically targets low gray-scale regions where noise is most problematic while preserving details in other regions, thus achieving localized noise reduction without overall detail loss.
3Object-generated harmful factors
If conventional noise reduction methods are applied, then dark-field noise is minimized, but gray-scale transitions become unnatural
Solution Approach 1:
The patent uses parameter changes in the noise reduction function to maintain natural gray-scale transitions. By carefully selecting and adjusting the function parameters (A and B), the system achieves noise reduction while preserving the smoothness and naturalness of gray-scale transitions across the display.
Solution Approach 2:
The patent implements feedback by using the noise reduction function that continuously processes the gray-scale values based on the relationship between input and output values. The function incorporates an intersection point with y=x to ensure that the processed values maintain natural transitions while reducing noise.
Data Source
AI summary
A display data processing method of a display device, a display device, an electronic device, and a storage medium are disclosed. The display data processing method includes: in response to a frequency of the dimming screen being consistent with a frequency of the display screen: determining a first gray-scale value of the first dimming pixel according to a plurality of input gray-scale values in an input image; determining a second gray-scale value of the first dimming pixel according to the first gray-scale value and a noise reduction function, where the noise reduction function is a monotonically increasing function in an interval (0, 1); obtaining a dimming gray-scale value of the first dimming pixel based on the second gray-scale value; and determining a plurality of target gray-scale values corresponding to the plurality of first display pixels according to the plurality of input gray-scale values and the dimming gray-scale value.