Composite Display Brightness Control for Outdoor Color Consistency
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Solution Overview
Problem
Outdoor displays face challenges in maintaining image quality under sunlight due to increased power consumption and heat accumulation, and simultaneous operation of active and cholesteric liquid crystal displays leads to uneven color and interference.
Innovation Solution
A composite display device comprising a first display panel (ChLCD) and a second display panel (active LED) with a brightness acquisition module, image management module, and panel controlling module to adjust display modes based on ambient light, ensuring color consistency and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If screen brightness is increased to combat bright ambient light, then image quality is improved, but power consumption increases and heat energy accumulates
Solution Approach 1:
The patent combines a ChLCD panel and an active light-emitting display panel into a stacked composite display structure. The ChLCD panel reflects ambient light in bright conditions while the active display provides self-emissive images in low-light conditions, eliminating the need to continuously increase brightness and thus reducing power consumption and heat generation.
Solution Approach 2:
The system dynamically switches between reflective mode (ChLCD dominant in bright ambient light) and emissive mode (active display dominant in low ambient light) based on real-time ambient light sensing. This dynamic adaptation allows the display to maintain image quality across different lighting conditions without continuously operating at high power consumption levels.
2Use of energy by moving object
If both ChLCD and active light-emitting display operate simultaneously, then energy is saved, but image decay and interference occur causing uneven color
Solution Approach 1:
The patent applies different display technologies to different spatial locations in the stacked structure: the ChLCD panel is positioned on the front surface to handle reflective display in bright conditions, while the active light-emitting display is positioned on the back surface to provide emissive display in low-light conditions. This spatial differentiation allows each panel to operate in its optimal mode without causing color interference.
Solution Approach 2:
The system changes operational parameters (which panel is active, brightness levels, contrast settings) based on ambient light conditions. In bright conditions, the ChLCD panel is activated with high reflectivity settings while the active display is dimmed or turned off. In low-light conditions, the roles are reversed or both operate at reduced intensity, maintaining color consistency while saving energy.
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
The solution maintains image quality and color consistency while reducing power consumption and heat, enabling simultaneous operation with multiple visual effects like static/dynamic images and 3D effects.
Implementation Method 1
The brightness acquisition module is connected to the composite display and configured to acquire an ambient brightness around the composite display
Implementation Method 2
Among the characteristics of cholesteric liquid crystal display (ChLCD), besides a planar state for controlling the reflectivity of the panel to reflect ambient light to provide an image
Implementation Method 3
If an active light-emitting display is disposed on and combined with the back of ChLCD
Data Source
AI summary
A composite display device includes a composite display, a brightness acquisition module, an image management module and a panel controlling module. The composite display includes a first display panel and a second display panel. The brightness acquisition module is connected to the composite display and acquires an ambient brightness around the composite display. The image management module is connected to the brightness acquisition module and generates a first image setting signal and a second image setting signal according to the ambient brightness. The panel controlling module is connected to the image management module and the composite display, and respectively controls the first display panel and the second display panel to display a first and second images based on the first and second image setting signals to form a composite image.