Curvature-Adjustable Display Device Backlight Control
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Solution Overview
Problem
Curved LCD display devices with initial horizontal alignment suffer from optical axis deviation and light leakage due to bending stresses, leading to brightness and color deviations, which severely affect image uniformity and display quality.
Innovation Solution
A curvature-adjustable display device with a detection module, backlight module, and driver module that adjusts backlight and image data parameters based on detected curvature, ensuring uniform backlight distribution and compensating for color deviations across different areas of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display device is subjected to bending process to achieve curved display, then the display form is improved and viewing experience is enhanced, but optical axis deviation is produced between substrates and light leakage occurs in peripheral regions
Solution Approach 1:
The backlight module is divided into multiple independent backlight substructures, each corresponding to different areas of the display device. This segmentation allows independent control of backlight parameters in different regions, enabling compensation for optical axis deviation and light leakage caused by bending.
Solution Approach 2:
Different backlight driving parameters are applied to different backlight substructures based on their specific positions and the local curvature characteristics. This local quality adjustment ensures that each region receives appropriate backlight compensation tailored to its specific optical issues.
2Ease of operation
If the display device is bent into curved surface, then the distance from viewer's eyes to various positions is equalized, but brightness deviation and color deviation occur in curved border areas
Solution Approach 1:
The system applies different backlight driving parameters and image data adjustment parameters to different display areas based on their specific curvature characteristics. This local adjustment compensates for brightness and color deviations in curved border areas while maintaining uniformity in central regions.
Solution Approach 2:
The detection module detects the actual curvature of the bent display device and provides feedback to the driver module. The driver module then adjusts backlight and image data parameters based on the detected curvature and preset corresponding relationships, creating a closed-loop control system that adaptively compensates for curvature-induced deviations.
3Reliability
If curvature detection and dynamic parameter adjustment system is added, then display quality at different curvatures is improved, but device complexity increases
Solution Approach 1:
The display device performs self-detection of its own curvature using the integrated detection module and automatically adjusts its backlight and image data parameters through the driver module. This self-service mechanism eliminates the need for external calibration equipment or complex manual adjustment systems.
Solution Approach 2:
The system changes operational parameters (backlight driving parameters and image data adjustment parameters) based on detected curvature values and preset corresponding relationships. This parameter-based approach is simpler than structural modifications and allows dynamic adaptation to different curvature states.
Data Source
AI summary
A curvature-adjustable display device includes: a detection module configured to detect a curvature of the display device and send the curvature; a backlight module including a plurality of backlight substructures, in which each backlight substructure is configured to provide backlight for different areas of the display device according to a backlight driving parameter matched with the backlight substructure; a driver module which is configured to receive the curvature sent by the detection module, determine the backlight driving parameter required by each backlight substructure according to the received curvature and a preset corresponding relationship between the curvature and the backlight driving parameter, and send the backlight driving parameter to each corresponding backlight substructure, respectively, so that the backlight substructures can provide backlight for different areas of the display device according to the backlight driving parameter matched with the backlight substructure; and a display panel configured to display images.