Viewing-Angle Switching Display Structure for Ambient Light Reduction
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Solution Overview
Problem
Existing electronic devices suffer from high reflectivity of ambient light due to metal wiring, affecting visibility and safety, particularly in environments like vehicles.
Innovation Solution
Incorporation of a light-emitting layer, light-controlling layer, retardation layer, and a viewing angle switching structure with linear polarizers and liquid-crystal layers to manage light polarization and reduce reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal wiring is used in the electronic device, then electrical conductivity is improved, but reflectivity of ambient light increases causing visibility problems
Solution Approach 1:
A retardation layer is introduced as an intermediary component between the metal wiring layer and the display surface. This layer modifies the polarization state of reflected light, converting linearly polarized reflected light into circularly polarized light, thereby reducing the intensity of reflected light reaching the user's eyes and improving visibility while maintaining the metal wiring's electrical conductivity function
2Reliability
If privacy functions are implemented, then information security is improved, but visibility for authorized users may be affected
Solution Approach 1:
The patent utilizes changes in polarization parameters to achieve both privacy and visibility requirements. By employing a retardation layer that converts polarization states, the device maintains high visibility for front-facing users while blocking side-viewing users, thus achieving privacy protection without compromising authorized visibility
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 effectively reduces ambient light reflectivity while maintaining privacy functions and visibility, enhancing user experience and safety.
Implementation Method 1
The liquid-crystal layer is disposed between the first linear polarizer and the second linear polarizer
Implementation Method 2
The first linear polarizer has a first transmission direction, the second linear polarizer has a second transmission direction, and the first transmission direction and the second transmission direction are parallel
Implementation Method 3
The retardation layer is disposed between the light-controlling layer and the first linear polarizer
Data Source
AI summary
An electronic device is provided. The electronic device includes a light-emitting layer, a light-controlling layer, a retardation layer, and a viewing angle switching structure. The light-controlling layer is disposed on the light-emitting layer. The light-controlling layer is disposed between the light-emitting layer and the retardation layer. The viewing angle switching structure includes a first linear polarizer, a liquid-crystal layer, and a second linear polarizer. The retardation layer is disposed between the light-controlling layer and the first linear polarizer. The liquid-crystal layer is disposed between the first linear polarizer and the second linear polarizer. The first linear polarizer has a first transmission direction, the second linear polarizer has a second transmission direction, and the first transmission direction and the second transmission direction are parallel.