Phase Retarder for Polarized Sunglass Visibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display images from flat display devices, such as LCDs and OLEDs, cannot be seen when viewed by individuals wearing polarized sunglasses due to the absorption of light by the sunglasses when the polarization direction of the light emitted from the device is perpendicular to the transmission axis of the sunglasses.
Innovation Solution
Incorporating a phase retarder on the light-emitting side of the display module with a compensation value range of [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is the wavelength of light emitted, to convert linearly polarized light into elliptically polarized light, allowing images to be visible from different angles even when worn with polarized sunglasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a flat display device emits linearly polarized light, then the display can be made thin and power-efficient, but the display images cannot be seen when viewed by individuals wearing polarized sunglasses
Solution Approach 1:
The patent changes the polarization state parameter of the light emitted by the display device from linear polarization to elliptical polarization by introducing a phase retarder. This parameter change allows the light to not be completely absorbed by polarized sunglasses, making the display visible to users wearing such sunglasses while maintaining the thin and power-efficient characteristics of flat display devices
Solution Approach 2:
The patent introduces a phase retarder as an intermediary component between the light source and the display module. This intermediary device modifies the polarization state of the light without affecting the underlying display technology, thereby resolving the conflict between maintaining flat display advantages and ensuring visibility for users with polarized sunglasses
2Object-affected harmful factors
If a phase retarder is added to convert polarization state, then visibility for polarized sunglasses users is improved, but device complexity increases
Solution Approach 1:
The patent employs a phase retarder in the form of a thin film or layer that can be integrated into the existing display module structure. This thin film approach minimizes the increase in device complexity while achieving the desired polarization conversion effect, allowing the phase retarder to be incorporated without significantly altering the overall device architecture
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 phase retarder enables display images to be seen by individuals wearing polarized sunglasses by converting linearly polarized light into elliptically polarized light, preventing complete absorption and maintaining visibility regardless of the device's orientation relative to the sunglasses.
Implementation Method 1
a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein, a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16]
Data Source
AI summary
The present disclosure provides a display device and an electronic equipment. The display device includes: a display module, the display module having a light emitting side; a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.