Display Panel Dimming Method for Contrast and Alignment
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Solution Overview
Problem
Existing display technologies face challenges in achieving high contrast and dynamic dimming while maintaining efficient backlight power consumption, especially in scenarios where the alignment between dimming and display screens is unknown.
Innovation Solution
A dimming method for a display panel that includes a dimming screen and a display screen, where the dimming screen is arranged on the backlight side of the display screen. The method involves acquiring image data, determining initial dimming pixel data, filtering dimming pixels based on their data, and updating dimming pixel data using filtering parameters calculated from relationships between dimming pixels and their initial data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a double-cell liquid crystal display panel with two overlapping liquid crystal screens is used for local dimming, then contrast and dynamic dimming capabilities are significantly improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent divides the display panel into two independent liquid crystal screens: a display screen for image rendering and a dimming screen for backlight modulation. Each screen operates independently with its own pixel structure and control circuitry, allowing the contrast improvement function to be achieved through structural segmentation while managing complexity through modular design
Solution Approach 2:
The dimming screen serves multiple functions: it acts as both a liquid crystal display layer and a backlight modulation layer. By making the dimming screen universally functional (both displaying and dimming), the patent reduces the need for separate dedicated components, thereby improving contrast while controlling overall device complexity
2Measurement precision
If precise alignment between dimming screen and display screen is required for optimal dimming performance, then dimming accuracy is improved, but manufacturing precision requirements and production difficulty increase
Solution Approach 1:
The patent implements self-alignment mechanisms where the dimming screen automatically adapts to the display screen's position and orientation. Through self-service alignment features (such as self-registering pixel structures or adaptive control algorithms), the system achieves accurate dimming without requiring extremely tight manufacturing tolerances, thereby improving dimming accuracy while reducing manufacturing precision requirements
Solution Approach 2:
The patent employs parameter adjustment mechanisms that allow the dimming screen to compensate for alignment variations by changing operational parameters (such as pixel selection criteria, dimming thresholds, or control signals). This dynamic parameter adjustment enables the system to maintain high dimming accuracy across a range of alignment conditions, reducing the stringency of manufacturing precision requirements
3Illumination intensity
If filtering algorithms are applied to dimming pixel data to improve dimming quality, then image quality is improved, but processing time and computational resources increase
Solution Approach 1:
The patent applies filtering algorithms selectively rather than uniformly across all pixels. By identifying specific regions or pixel types that benefit most from filtering (such as high-contrast areas or boundary regions) and applying filtering only there, the system improves image quality in critical areas while minimizing overall processing time and computational resource consumption
Solution Approach 2:
The patent implements spatially varying filtering strategies where different filtering parameters and intensities are applied to different regions of the image based on local characteristics. High-frequency filtering may be applied to edge regions while low-frequency filtering is used in uniform areas, thereby improving overall image quality while reducing total processing time through localized optimization
Data Source
AI summary
A dimming method for a display panel is provided, including: acquiring image data of an image to be displayed; determining initial dimming pixel data of each of dimming pixels according to the image data; determining a dimming pixel to be filtered in the dimming screen according to the initial dimming pixel data of each of dimming pixels; determining a first filtering region according to the determined dimming pixel to be filtered; determining a filtering parameter of each of dimming pixels in the first filtering region according to a relationship between each of dimming pixels in the first filtering region and initial dimming pixel data of each of dimming pixels in the first filtering region; and updating dimming pixel data of the dimming pixel to be filtered according to the filtering parameter of each of dimming pixels in the first filtering region, so as to obtain updated dimming pixel data.