Under-Display Camera Polarizer With Shape-Memory Slit Switching
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Solution Overview
Problem
The challenge is to increase the amount of incoming light for the camera while ensuring the imaging effect during photography and hiding the camera when not in use, without affecting the normal display of the screen.
Innovation Solution
A display device with a light admission hole and orientation release structure, utilizing linear memory structures made of shape-memory alloys, which form oriented slits to act as a polarizer when the camera is not in use and release these slits when activated, allowing the camera to receive more light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the camera is hidden under the display screen to increase screen-to-body ratio, then the appearance is improved and screen ratio is increased, but the loss of light transmittance is large which affects the imaging effect during photography
Solution Approach 1:
The patent applies a dynamic polarizer structure that can switch between two states: when the camera is not in use, the polarizer is in its original state to maintain display functionality; when the camera is activated, the polarizer rotates to change its orientation, allowing light to pass through to the camera sensor. This dynamic transformation resolves the contradiction by adapting the light transmittance property based on operational state.
Solution Approach 2:
The patent changes the orientation parameter of the polarizer material based on the operational state. By rotating the polarizer or changing its angular orientation, the system controls the amount of light transmitted to the camera while maintaining the hidden camera appearance during display operations.
2Illumination intensity
If the polarizers at the camera position are removed to ensure imaging effect, then the light transmittance is improved, but the camera cannot be hidden and the screen cannot display normally
Solution Approach 1:
Instead of permanently removing the polarizer, the patent implements a dynamic polarizer that can rotate or change orientation based on operational state. During display, the polarizer maintains its original orientation for normal display function; during camera use, it rotates to allow light transmission, thus dynamically adapting to different functional requirements.
Solution Approach 2:
The dynamic polarizer structure serves multiple functions: it acts as a normal polarizer for display operations and simultaneously functions as a light-controlling element for camera operations. This multi-functionality eliminates the need to choose between display quality and camera imaging quality.
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
Ensures the camera receives sufficient light for imaging while maintaining the screen's normal display by controlling the polarization function of the linear memory structures, enhancing the screen-to-body ratio and aesthetic appeal.
Implementation Method 1
linear memory structures made of shape-memory alloys, which form oriented slits to act as a polarizer when the camera is not in use and release these slits when activated
Implementation Method 2
the plurality of linear memory structures are regularly arranged to form an oriented slit... the oriented state in which the plurality of linear memory structures are regularly arranged to form the oriented slit is consistent with the oriented state of the first polarizer
Data Source
AI summary
A display device and an electronic apparatus are disclosed. The display device includes a display panel, and a first polarizer and a second polarizer that are respectively arranged on both sides of the display panel. A light admission hole is defined in at least one of the first polarizer and the second polarizer and disposed corresponding to the camera. The display device further includes at least one orientation release structure arranged corresponding to the light admission hole. A linear memory structure is transfer-printed to the orientation release structure at the position corresponding to the light hole. When the orientation release structure is not working, the linear memory structures are regularly arranged to form oriented slits. When the orientation release structure is working, the linear memory structures release the oriented slit.