Transparent Conductive Interconnections for Under-Display Camera Aperture
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Solution Overview
Problem
The placement of cameras underneath displays in electronic devices leads to significant image quality degradation due to light diffraction, reflection, and transmission loss, resulting in reduced image resolution, haze, ghost images, and decreased signal-to-noise ratio.
Innovation Solution
The use of non-reflective materials to cover the bottom and sides of pixel groups and transparent conductive interconnections to reduce light reflections and diffraction, combined with a lower pixel density in the camera aperture region to minimize transmission loss, effectively mitigating image quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a camera is placed underneath the display, then the display can be full screen, but image quality degrades due to light diffraction, reflection, and transmission loss
Solution Approach 1:
The patent applies different properties to different regions of the display. Non-reflective material is applied specifically to the bottom and sides of pixel groups above the camera aperture region, while transparent conductive interconnections are used in the camera aperture region instead of traditional metal interconnections. This local differentiation allows the display to maintain full screen coverage while minimizing optical interference in the critical camera region.
Solution Approach 2:
The patent introduces intermediary materials between the pixel groups and the camera to reduce optical interference. Non-reflective material serves as an intermediary to absorb stray light, while transparent conductive interconnections act as intermediaries that conduct electricity with minimal light diffraction. These intermediaries mediate between the display structure and the camera to improve image quality.
2Reliability
If traditional metal interconnections are used to couple pixels, then electrical conductivity is achieved, but light diffraction and reflection occur
Solution Approach 1:
The patent changes the material parameter of the interconnections from traditional metal to transparent conductive material in the camera aperture region. This parameter change maintains electrical conductivity while fundamentally altering the optical properties to reduce light diffraction and reflection. The transparent conductive material has both the electrical properties needed for pixel coupling and the optical transparency needed to minimize interference with camera imaging.
3Measurement precision
If pixel density is maintained uniformly across the display, then display resolution is optimized, but transmission loss increases over the camera aperture region
Solution Approach 1:
The patent applies non-reflective material specifically to the bottom and sides of pixel groups in the camera aperture region, creating a local modification that reduces light scattering and transmission loss in the critical region above the camera while maintaining normal pixel density and display resolution across the rest of the display.
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
This approach significantly reduces image quality issues by minimizing light reflections and diffraction while increasing the effective camera aperture size, resulting in improved image resolution and reduced noise.
Implementation Method 1
the non-reflective material absorbs at least 80% of light incident on the non-reflective material
Implementation Method 2
Coupling pixels with transparent conductive interconnections may also reduce light diffraction caused by the interconnections
Implementation Method 3
Some major problems caused by the display's structure on image quality from a camera may include light diffraction, light reflection, and transmission loss
Data Source
AI summary
A device (100) includes a display (110) itself including pixel groups. A bottom and sides of each of the pixel groups are covered with non-reflective material. The pixel groups are electrically coupled together with transparent conductive interconnections. A camera (122) is located beneath the display and the camera is configured to sense light that passes through the display.