Reflection Polarizer Layout for Brighter Camera-Through Displays
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Solution Overview
Problem
Display devices using a polarizing plate and a half mirror suffer from dimming of display light, leading to reduced video quality.
Innovation Solution
A display device incorporating a reflection type polarizing plate that selectively transmits and reflects polarized light to align the user's line-of-sight with the camera's imaging direction, allowing the camera to capture images with improved quality while minimizing dimming of display light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a polarizing plate and a half mirror are used to align user line-of-sight with camera imaging direction, then the camera can capture images, but display light is dimmed and video quality lowers
Solution Approach 1:
The patent combines the polarizing plate and half mirror into a single integrated reflection type polarizing plate that performs both functions: aligning polarization directions and reflecting light. This merging eliminates the need for separate components and reduces light loss that would occur with multiple optical elements in the light path.
Solution Approach 2:
The reflection type polarizing plate serves multiple functions simultaneously: it acts as both a polarizing element to control light polarization and a mirror to reflect light between the display and camera. This multi-functionality reduces the number of components needed and minimizes dimming effects.
2Illumination intensity
If a reflection type polarizing plate is used to reduce dimming, then display light brightness is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the polarizing plate and half mirror into a single reflection type polarizing plate, reducing structural complexity while maintaining or improving display light brightness. This integration eliminates the need for separate mounting and alignment of multiple components.
Solution Approach 2:
The reflection type polarizing plate performs multiple optical functions (polarization control and light reflection) in a single component, simplifying the overall device structure while achieving the desired brightness improvement.
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 use of a reflection type polarizing plate enhances video quality by reducing dimming and aligning the user's line-of-sight with the camera's imaging direction, improving both the presented video and captured images without the need for a half mirror.
Implementation Method 1
a reflection type polarizing plate configured to selectively transmit first polarized light having a first polarization direction and selectively reflect second polarized light having a second polarization direction different from the first polarization direction
Implementation Method 2
the reflection type polarizing plate is disposed in an imaging direction of the camera so that the reflection type polarizing plate transmits one of an image of natural light including the first polarized light and the second polarized light and a video on the display and reflects the other of the image of natural light and the video on the display
Data Source
AI summary
The present disclosure relates to a display device that makes it possible to provide a display device in which dimming of display light is reduced by using a reflection type polarizing plate.The display device includes a display, a camera, and a reflection type polarizing plate configured to selectively transmit first polarized light having a first polarization direction and selectively reflect second polarized light having a second polarization direction different from the first polarization direction. The reflection type polarizing plate is disposed in an imaging direction of the camera so that the reflection type polarizing plate transmits one of an image of natural light including first polarized light and second polarized light and a video on the display and reflects the other of the image of natural light and the video on the display, and the camera is configured to capture the image of natural light including only one of the first polarized light and the second polarized light provided through the reflection type polarizing plate. The technology of the present disclosure can be applied to, for example, a telecommunication apparatus and the like.