Back-Mounted Camera With Variable Transmittance Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the pursuit of an ultra-high screen ratio for portable mobile display terminals, existing designs face challenges such as compromised aesthetics and mechanical risks due to grooves, openings, or elevating cameras, which do not effectively achieve high transmittance and are prone to damage.
Innovation Solution
A display device with a transparent substrate and electroluminescent devices in a display area, incorporating a device with variable transmittance that switches between high and low transmittance states, allowing external light to pass through when the image acquisition device is active and blocking reflected light when inactive, thereby optimizing screen ratio and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a groove or opening is designed in the display panel to accommodate the image acquisition device, then the image acquisition device can be integrated, but the aesthetics are compromised and the screen ratio is reduced
Solution Approach 1:
The image acquisition device is extracted from the front display area and relocated to the backplane side of the display panel. This allows the front surface to maintain a complete, uninterrupted display area without grooves or openings, thereby preserving aesthetics and achieving ultra-high screen ratio while still accommodating the camera functionality.
Solution Approach 2:
The image acquisition device is moved from the traditional front-facing horizontal plane to the backplane side, utilizing the vertical dimension and the space between the display panel and the backplane circuit assembly. This dimensional relocation resolves the conflict between integration and aesthetics.
2Ease of operation
If the image acquisition device is placed on the front surface, then it can capture images, but reflected light from the device affects display quality
Solution Approach 1:
The image acquisition device is extracted from the front display surface and relocated to the backplane side. This spatial separation eliminates the reflected light from the device that would otherwise interfere with the display quality, while the device retains its image capture functionality through optical pathways designed to pass through or reflect off the display panel.
Solution Approach 2:
The display panel itself acts as an intermediary between the image acquisition device and the external environment. By positioning the device on the backplane side, the display panel mediates the optical paths, allowing light to reach the sensor while preventing reflected light from returning to the display area, thus eliminating the harmful reflection effect.
3Illumination intensity
If the transmittance of the device with variable transmittance is increased to allow more external light, then image acquisition is improved, but light reflection increases when the device is inactive
Solution Approach 1:
The device with variable transmittance dynamically adjusts its optical properties based on operational state. When the image acquisition device is active, the variable transmittance device switches to high transmittance mode to maximize external light transmission for image capture. When inactive, it switches to low transmittance mode to minimize light reflection and maintain display quality, thus resolving the contradiction between light transmission and reflection.
Solution Approach 2:
The transmittance parameter of the device with variable transmittance is changed based on operational requirements. By controlling the transmittance parameter to switch between high and low states, the system optimizes both image acquisition performance and display quality, preventing light reflection when the device is inactive while ensuring sufficient light transmission during operation.
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 enables an ultra-high screen ratio by allowing maximum external light to reach the image acquisition device during operation while minimizing light reflection and ensuring normal display functionality, thus providing a better user experience without the need for mechanical compromises.
Implementation Method 1
the device with variable transmittance comprises an electrochromic device, the electrochromic device comprising a first transparent conductive layer, an ion storage layer, an ion conductor layer, an electrochromic layer, and a second transparent conductive layer which are sequentially stacked
Implementation Method 2
a plurality of electroluminescent devices arranged in an array on the substrate, the plurality of electroluminescent devices being located in a display area of the display device
Data Source
AI summary
A display device, a method for controlling the same, and a display panel are provided, the display device includes: a transparent substrate; a plurality of electroluminescent devices arranged in an array on the substrate, a device with variable transmittance located between the electroluminescent devices and the substrate, the device with variable transmittance is configured so that a transmittance of the device with variable transmittance is switchable between a first transmittance and a second transmittance, and the first transmittance is greater than the second transmittance; and an image acquisition device on a side of the substrate away from the electroluminescent devices, in a case where the transmittance of the device with variable transmittance is switched to the first transmittance, external light irradiating the display device can pass through the device with variable transmittance and be incident on the image acquisition device.