Stacked AMOLED and Cholesteric LCD Display for Adaptive Power Management
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Solution Overview
Problem
Current display technologies, such as transmissive, reflective, and transflective LCDs, face issues with high power consumption, low outdoor visibility, and limited color reproduction, making them unsuitable for both high picture quality and low power consumption requirements, especially in mobile terminals and e-book applications.
Innovation Solution
An Active Matrix Organic Light Emitting Diode (AMOLED) display with a cholesteric Liquid Crystal Display (LCD) configuration that can switch between high picture quality mode and low power mode by determining the display mode based on the environment, using a controller to select between AMOLED and cholesteric LCD operation, with stacked cholesteric liquid crystal color layers for adaptive functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If AMOLED display is used to achieve high optical characteristics and picture quality, then display quality is improved, but power consumption increases
Solution Approach 1:
The display system dynamically switches between AMOLED and cholesteric LCD modes based on environmental conditions (indoor/outdoor) and usage scenarios (motion picture/e-book). The controller adjusts the operating mode in real-time to optimize the balance between display quality and power consumption, making the system adaptive rather than static.
Solution Approach 2:
The stacked display module integrates two different display technologies (AMOLED and cholesteric LCD) into a single universal display system that can perform multiple functions: high-quality indoor display, outdoor visible display, motion picture playback, and e-book reading. This multi-functional design resolves the contradiction by allowing each technology to excel in its optimal operating conditions.
2Use of energy by moving object
If cholesteric LCD is used to achieve low power consumption, then power efficiency is improved, but outdoor visibility and picture quality deteriorate
Solution Approach 1:
The system dynamically switches from cholesteric LCD mode to AMOLED mode when outdoor visibility is required, detecting environmental conditions and adjusting the display technology accordingly. This dynamic adaptation ensures optimal performance for each operating condition.
Solution Approach 2:
The stacked display module creates a universal display solution that combines the low power consumption advantage of cholesteric LCD with the high outdoor visibility and picture quality of AMOLED, allowing the single system to excel in both power efficiency and visibility across different environments.
3Illumination intensity
If transmissive LCD with backlight is used to achieve good indoor visibility, then indoor display quality is improved, but power consumption and current usage increase
Solution Approach 1:
The invention extracts and removes the power-consuming backlight unit from the display system. By eliminating the backlight and using the AMOLED's self-emissive capability or the cholesteric LCD's reflective property, the system achieves good indoor visibility without the continuous power consumption associated with backlight illumination.
Solution Approach 2:
The AMOLED layer serves itself as the light source through self-emission, eliminating the need for an external backlight. The cholesteric LCD layer utilizes ambient light reflection, making the display system self-sufficient and independent of power-consuming backlight illumination.
4Use of energy by moving object
If reflective LCD is used to achieve low power consumption with external light, then power efficiency is improved, but visibility in low light conditions deteriorates
Solution Approach 1:
The stacked display module creates a universal display system that adapts to both high light (outdoor) and low light (indoor) environments by switching between cholesteric LCD and AMOLED modes, maintaining visibility across all lighting conditions while optimizing power consumption for each scenario.
Solution Approach 2:
The system dynamically detects ambient light conditions and switches from cholesteric LCD mode (for bright outdoor conditions) to AMOLED mode (for low light indoor conditions), ensuring continuous visibility while maintaining power efficiency appropriate for each environmental context.
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
Enables high picture quality in indoor environments and super low power consumption in outdoor settings, reducing power usage and improving visibility while maintaining reduced thickness and cost compared to traditional combinations.
Implementation Method 1
a first cholesteric liquid crystal color layer 22 stacked at an upper surface of the AMOLED 21, a second cholesteric liquid crystal color layer 23 stacked at an upper part of the first cholesteric liquid crystal color layer 22, and a third cholesteric liquid crystal color layer 24 stacked at an upper part of the second cholesteric liquid crystal color layer 23
Implementation Method 2
Active Matrix Organic Light Emitting Diode (AMOLED) display
Data Source
AI summary
An method and apparatus are provided. The method includes, at an apparatus, determining a display mode to present content, selecting, based at least in part on the display mode, a display from a display module comprising a plurality of stacked displays, operatively coupled with the apparatus, and presenting at least a part of the content via the display.