Liquid Crystal Light-Emitting Display Switching Modes
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Solution Overview
Problem
Current display devices lack the ability to switch between normal display and see-through modes effectively, compromising user safety and visibility in diverse applications such as augmented reality and digital signage.
Innovation Solution
A display device incorporating a light-emitting element and a liquid crystal element with transmissive properties, where the liquid crystal element can switch between transmitting and blocking visible light, allowing for a dual-mode display that combines high contrast and see-through capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-emitting element is used for normal display, then high contrast and low power consumption are achieved, but the ability to switch to see-through mode is lost
Solution Approach 1:
The patent combines a light-emitting element and a liquid crystal element into a single integrated display device. The light-emitting element provides normal display with high contrast, while the liquid crystal element enables see-through mode by controlling light transmission. This merging allows the device to achieve multiple display modes without requiring separate devices, resolving the contradiction between adaptability and structure complexity.
Solution Approach 2:
The display device is designed to perform multiple functions: it can operate in normal display mode using the light-emitting element, and switch to see-through mode using the liquid crystal element. This multi-functionality allows the same device to serve different purposes (normal display and see-through display) without requiring additional components, thus improving adaptability while maintaining reasonable structural complexity.
2Illumination intensity
If a liquid crystal element is added for see-through capability, then visibility is improved, but power consumption increases
Solution Approach 1:
The liquid crystal element is controlled to switch between transparent and opaque states based on the desired display mode. In see-through mode, the liquid crystal element is activated to control light transmission; in normal display mode, it remains inactive or in a default state. This periodic activation only when needed reduces the overall power consumption compared to continuously operating the liquid crystal element, thus improving visibility while minimizing energy usage.
3Illumination intensity
If the liquid crystal element is always transparent, then see-through visibility is maximized, but normal display contrast is reduced
Solution Approach 1:
The liquid crystal element's light transmission property is dynamically controlled based on the operating mode. When see-through mode is required, the liquid crystal element is set to a transparent state to maximize visibility. When normal display mode is required, it switches to an opaque or light-blocking state to ensure high contrast. This dynamic adjustment allows the device to optimize for either see-through visibility or display contrast depending on the current mode, resolving the contradiction between these two requirements.
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 seamless switching between normal display and see-through modes, enhancing user safety and visibility while maintaining high contrast and low power consumption, suitable for various applications including augmented reality and digital signage.
Implementation Method 1
The liquid crystal element transmits light when applied with an electric field, and blocks light when applied with no electric field
Implementation Method 2
By voltage application to this element, the light-emitting organic compound can emit light
Data Source
AI summary
A display device that can switch between normal display and see-through display is provided. Visibility in see-through display is improved. A liquid crystal element overlaps with a light-emitting element. The light-emitting element, a transistor, and the like overlapping with the liquid crystal element transmit visible light. When the liquid crystal element blocks external light, an image is displayed with the light-emitting element. When the liquid crystal element transmits external light, an image displayed with the light-emitting element is superimposed on a transmission image through the liquid crystal element.