Under-display Camera Assembly with Iris Diaphragm for Full-Screen Display
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Solution Overview
Problem
Existing under-display camera technologies face challenges in achieving a full-screen display due to limitations in light transmittance and alignment issues between the OLED screen and the camera module, leading to incomplete imaging and visual impact.
Innovation Solution
The solution involves designing an under-display camera assembly with an organic light-emitting diode (OLED) screen that has a reduced pixel density in the under-display camera area, allowing for increased light transmittance. A physical iris diaphragm is placed between the lens barrel and the OLED screen, enabling aperture adjustment and reflection to compensate for brightness, ensuring accurate alignment through a specially designed lens holder, and maintaining the integrity of the display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the front camera module is arranged on the top frame to form a notch or water drop screen, then the camera function is achieved, but the screen-to-body ratio is reduced and visual impact is insufficient
Solution Approach 1:
The patent moves the camera module from the traditional top-frame position (2D plane arrangement) to the backside of the display screen (3D spatial arrangement), utilizing the z-dimension to achieve full-screen display while maintaining camera functionality. The camera module is positioned at a specific distance from the display screen through a lens holder, creating a three-dimensional optical path that allows light to pass through the display screen to the camera sensor.
2Area of stationary object
If a telescopic camera module is used to hide and use the camera, then the full screen is achieved, but the camera is prone to damage from external forces during expansion and contraction
Solution Approach 1:
The patent pre-positions the camera module on the backside of the display screen at a fixed location, establishing the optical path in advance before any imaging operation. The lens holder is designed with a predetermined height that ensures the camera module maintains the correct distance from the display screen, eliminating the need for dynamic adjustment mechanisms and preventing damage from repeated expansion and contraction movements.
3Area of stationary object
If the front camera module is placed at the back end of the existing OLED screen, then the full screen appearance is achieved, but the complex microstructures inside the OLED screen block light and prevent imaging
Solution Approach 1:
The patent modifies the optical parameters of the system by controlling the distance between the display screen and the camera module through the lens holder. By optimizing this distance, the system compensates for the light blocking effect of the OLED microstructures, allowing sufficient light to reach the camera sensor for clear imaging while maintaining the full-screen appearance. The lens holder height is specifically designed to achieve the optimal focal distance.
4Ease of manufacture
If the distance between the main board and the OLED screen is not equal to the camera module height, then the assembly is easier to manufacture, but the camera module cannot be aligned with the light-transmitting region of the OLED screen
Solution Approach 1:
The patent introduces the lens holder as an intermediary component between the display screen and the camera module. The lens holder serves as a mounting structure that precisely positions the camera module at the correct distance from the display screen, decoupling the camera module height from the main board to display screen distance. This intermediary structure enables both easy assembly and precise alignment of the optical components.
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 enhances light transmittance in the under-display camera area, compensates for brightness variations, and ensures accurate alignment, resulting in a complete full-screen display effect with greater visual impact and improved user experience.
Implementation Method 1
in the closed state, the iris diaphragm reflects light from the organic light-emitting diode display screen
Implementation Method 2
organic light-emitting diode displays (i.e., OLED screens, wherein OLED is the abbreviation of Organic Light-Emitting Diode) can emit light without a backlight
Data Source
Figure 1~2
Figure 3~4A
Figure 4B~4C
AI summary
The present application provides an under-display camera assembly, including: an organic light-emitting diode display screen, wherein a display region of said display screen includes an under-display camera region and a non-under-display camera region, and a pixel density of the under-display camera region is configured to be less than that of the non-under-display camera region; and a camera module located at a rear end of the under-display camera region, and including an iris diaphragm, a lens group, and a photosensitive component, wherein the iris diaphragm is provided between a bottom surface of a pixel light-emission layer and a top surface of the foremost lens of the lens group, and has a closed state and a transmission state. The iris diaphragm, in the closed state, reflects light from the display screen or emits light by itself from the front of the display screen, and the transmission state refers to a state in which a light path of the camera module is opened. The application further provides a corresponding terminal device. Th application can produce full-screen display effects, provide an added aperture adjustment function, and facilitate alignment during an assembly process.