Dual-Screen Display Panel Dynamic Luminance Control
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Solution Overview
Problem
Conventional display devices with global dimming technology suffer from low contrast, high energy consumption, and heat generation due to fixed backlight luminance, while local dimming technologies face limitations in accuracy and image quality due to manufacturing process constraints and response speed issues.
Innovation Solution
A dual-screen display panel system that generates dimming and display driving voltages based on grayscale relationships to adjust luminance dynamically, using a dimming screen between the backlight and display screen, and employing a method to establish and adjust these voltages to achieve desired transmittance and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If global dimming technology is used with fixed backlight luminance, then the display device is simple to implement, but the image contrast is low and energy consumption is high
Solution Approach 1:
The patent divides the backlight system into multiple independently controllable local dimming zones, where each zone can adjust its luminance separately based on the local image content. This segmentation allows different regions to have different brightness levels, thereby improving image contrast while maintaining reasonable system complexity through modular control architecture.
Solution Approach 2:
The patent implements local dimming by assigning different brightness characteristics to different spatial zones of the backlight. Each local zone adjusts its luminance according to the specific image data in that region, creating locally optimized image quality with enhanced contrast in dark areas while preserving brightness in light areas.
2Illumination intensity
If local dimming technology is used to adjust backlight locally in real time, then image contrast is improved, but manufacturing precision requirements increase and response speed may be limited
Solution Approach 1:
The backlight is divided into a finite number of discrete dimming zones with clearly defined boundaries. This segmentation approach simplifies the manufacturing requirements by creating distinct, manageable zones that can be independently controlled, reducing the precision demands compared to continuous local dimming while still achieving effective local brightness adjustment.
Solution Approach 2:
The patent uses a predetermined number of dimming zones that may be fewer than the maximum possible locations for local adjustment. This partial action approach balances manufacturing feasibility with performance requirements, achieving sufficient image contrast improvement without demanding extreme manufacturing precision for every possible zone.
3Use of energy by moving object
If local dimming is implemented with multiple dimming zones, then energy consumption is reduced, but device complexity and heat management challenges increase
Solution Approach 1:
The patent implements dynamic backlight control where each dimming zone adjusts its luminance in real-time based on the local image content and brightness requirements. This dynamic adjustment allows the system to consume energy only where and when needed, significantly reducing overall power consumption compared to global dimming while managing complexity through efficient real-time control algorithms.
Solution Approach 2:
The system dynamically changes the luminance parameter of each dimming zone based on image data analysis. By adjusting the backlight intensity parameter locally and temporally, the system optimizes energy consumption to match actual display needs, reducing power usage in dark scenes and specific dark regions without requiring complex hardware modifications.
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
This approach enhances image contrast, reduces power consumption, and minimizes heat generation by dynamically adjusting luminance, thereby improving the overall display quality and accuracy of the dual-screen display panel.
Implementation Method 1
determining dimming driving voltages for the plurality of dimming areas corresponding to the first image data according to a grayscale-dimming driving voltage relationship for the dimming screen
Implementation Method 2
determining display driving voltages for the plurality of display areas corresponding to the image data according to a grayscale-display driving voltage relationship for the display screen
Data Source
AI summary
The embodiments of the present disclosure provide a method for displaying an image on a dual-screen display panel. According to an embodiment, the dual-screen display panel comprises a dimming screen and a display screen. The method comprises: generating first image data for the dimming screen according to image data; determining dimming driving voltages for a plurality of dimming areas based on the first image data according to a grayscale-dimming driving voltage relationship; determining display driving voltages for a plurality of display areas based on the image data according to a grayscale-display driving voltage relationship; and driving the dimming screen and the display screen with the determined dimming driving voltages and display driving voltages, respectively, to display the image.