Lensless Display Panel Infrared Mask Imaging
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Solution Overview
Problem
The challenge in miniaturizing cameras lies in reducing or eliminating complex optical lenses, which are difficult to shrink due to their volume, necessitating a lensless imaging solution for integration in compact electronic devices like mobile phones.
Innovation Solution
A display panel incorporating a photosensitive layer and an infrared mask with hollowed-out regions, where the infrared mask has a preset pattern to allow infrared light to pass through and be converted into an image signal by the photosensitive layer, effectively serving as a lensless camera for image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex optical lenses are used for image capture, then imaging quality is improved, but device volume increases
Solution Approach 1:
The patent extracts the lens component from the imaging system and replaces it with a lensless direct imaging structure. The display panel directly captures images through its display area without requiring external optical lenses, thereby eliminating the volume occupation of lenses while maintaining imaging functionality.
Solution Approach 2:
The patent merges the imaging function with the display panel by integrating a photosensitive layer and infrared mask directly onto the display structure. This combination allows the display panel to serve dual purposes: displaying information and capturing images, thereby eliminating the need for separate camera modules with optical lenses.
2Measurement precision
If multiple lenses are used for imaging, then imaging performance is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent removes the complex multi-lens optical system and replaces it with a simplified lensless imaging structure consisting of an infrared mask and photosensitive layer integrated on the display panel. This extraction of the lens component dramatically simplifies the manufacturing process while maintaining imaging capability.
Solution Approach 2:
The display panel is designed to perform multiple functions: display output and image capture. By integrating the imaging function directly into the display panel structure, the system eliminates the need for separate camera assembly processes, thereby improving ease of manufacture while maintaining imaging performance.
3Volume of moving object
If optical lenses are reduced in size, then device compactness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent completely eliminates the lens component from the system, removing the need for lens miniaturization and its associated high manufacturing precision requirements. The lensless direct imaging approach uses the display panel's native structure for image capture, thereby achieving device compactness without compromising manufacturing precision.
4Device complexity
If lensless imaging is implemented, then device complexity is reduced, but imaging quality may deteriorate
Solution Approach 1:
The patent uses an infrared mask with specific patterns (such as hash patterns or dot patterns) to modulate infrared light before it reaches the photosensitive layer. By carefully designing the pattern parameters and using infrared wavelengths, the system achieves acceptable imaging quality with a simplified lensless structure, thereby reducing device complexity while maintaining functional imaging capability.
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 solution enables a compact, lightweight, and simplified camera design within the display panel, enhancing user experience by increasing screen-to-body ratio and supporting features like face recognition and night vision imaging without affecting normal display functionality.
Implementation Method 1
The photosensitive layer is configured to receive infrared light passing though the hollowed-out regions and the light-transmitting portions, and convert the infrared light into an image signal
Data Source
AI summary
A display panel includes a display layer, a photosensitive layer and an infrared mask. The display layer is configured to display an image, the display layer has light-transmitting portions, and the light-transmitting portions are configured to transmit infrared light. The photosensitive layer is disposed on a side of the display layer. The infrared mask is disposed on a side of the photosensitive layer proximate to the display layer, the infrared mask has hollowed-out regions, the hollowed-out regions are configured to make the infrared mask have a preset pattern, and a region in the infrared mask except the hollowed-out regions is configured to prevent transmission of the infrared light. The photosensitive layer is configured to receive infrared light passing though the hollowed-out regions and the light-transmitting portions, and convert the infrared light into an image signal.